Add the base Enlightenment Foundation Libraries - eina, eet, evas, ecore, embryo, and edje.

Note that embryo wont be used, but I'm not sure yet if you can build edje without it.

1 files changed, 4156 insertions, 0 deletions

diff --git a/libraries/eet/src/lib/Eet.h b/libraries/eet/src/lib/Eet.h
new file mode 100644
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--- /dev/null
+++ b/libraries/eet/src/lib/Eet.h
@@ -0,0 +1,4156 @@
+/**
+   @brief Eet Data Handling Library Public API Calls
+
+   These routines are used for Eet Library interaction
+
+   @mainpage Eet Library Documentation
+
+   @version 1.5.0
+   @date 2000-2011
+
+   Please see the @ref authors page for contact details.
+
+   @section toc Table of Contents
+
+   @li @ref intro
+   @li @ref example
+   @li @ref compiling
+   @li @ref install
+   @li @ref next_steps
+   @li @ref intro_example
+
+   @section intro What is Eet?
+
+   It is a tiny library designed to write an arbitrary set of chunks of data
+   to a file and optionally compress each chunk (very much like a zip file)
+   and allow fast random-access reading of the file later on. It does not
+   do zip as a zip itself has more complexity than is needed, and it was much
+   simpler to implement this once here.
+
+   Eet is extremely fast, small and simple. Eet files can be very small and
+   highly compressed, making them very optimal for just sending across the
+   internet without having to archive, compress or decompress and install them.
+   They allow for lightning-fast random-acess reads once created, making them
+   perfect for storing data that is written once (or rarely) and read many
+   times, but the program does not want to have to read it all in at once.
+
+   It also can encode and decode data structures in memory, as well as image
+   data for saving to Eet files or sending across the network to other
+   machines, or just writing to arbitrary files on the system. All data is
+   encoded in a platform independent way and can be written and read by any
+   architecture.
+
+   @section example A simple example on using Eet
+
+   Here is a simple example on how to use Eet to save a series of strings to a
+   file and load them again. The advantage of using Eet over just
+   fprintf() and
+   fscanf() is that not only can these entries be strings, they need no special
+   parsing to handle delimiter characters or escaping, they can be binary data,
+   image data, data structures containing integers, strings, other data
+   structures, linked lists and much more, without the programmer having to
+   worry about parsing, and best of all, Eet is very fast.
+
+   This is just a very simple example that doesn't show all of the capabilities
+   of Eet, but it serves to illustrate its simplicity.
+
+   @include eet-basic.c
+
+   @section compiling How to compile using Eet ?
+
+   Eet is a library your application links to. The procedure for this is very
+   simple. You simply have to compile your application with the appropriate
+   compiler flags that the @p pkg-config script outputs. For example:
+
+   Compiling C or C++ files into object files:
+
+   @verbatim
+   gcc -c -o main.o main.c `pkg-config --cflags eet`
+   @endverbatim
+
+   Linking object files into a binary executable:
+
+   @verbatim
+   gcc -o my_application main.o `pkg-config --libs eet`
+   @endverbatim
+
+   You simply have to make sure that pkg-config is in your shell's PATH (see
+   the manual page for your appropriate shell) and eet.pc in /usr/lib/pkgconfig
+   or its path is in the PKG_CONFIG_PATH environment variable. It's that simple
+   to link and use Eet once you have written your code to use it.
+
+   Since the program is linked to Eet, it is now able to use any advertised
+   API calls to serialize your data.
+
+   You should make sure you add any extra compile and link flags to your
+   compile commands that your application may need as well. The above example
+   is only guaranteed to make Eet add it's own requirements.
+
+
+   @section install How is it installed?
+
+   Simple:
+
+   @verbatim
+   ./configure
+   make
+   su -
+   ...
+   make install
+   @endverbatim
+
+   @section next_steps Next Steps
+
+   After you understood what Eet is and installed it in your system you
+   should proceed understanding the programming interface. We'd recommend
+   you to take a while to learn Eina
+   (http://docs.enlightenment.org/auto/eina/) as it is very convenient
+   and optimized, and Eet provides integration with it.
+
+   Recommended reading:
+
+   @li @ref Eet_File_Group to know the basics to open and save files.
+   @li @ref Eet_Data_Group to know the convenient way to serialize and
+    parse your data structures automatically. Just create your
+    descriptors and let Eet do the work for you.
+
+   @section intro_example Introductory Examples
+
+   @ref Examples
+
+   @todo Document data format for images and data structures.
+
+ */
+
+/**
+   @page authors Authors
+   @author Carsten Haitzler <raster@@rasterman.com>
+   @author David Goodlad <dgoodlad@@gmail.com>
+   @author Cedric Bail <cedric.bail@@free.fr>
+   @author Arnaud de Turckheim <quarium@@gmail.com>
+   @author Luis Felipe Strano Moraes <lfelipe@@profusion.mobi>
+   @author Chidambar Zinnoury <illogict@@online.fr>
+   @author Vincent Torri <vtorri@@univ-evry.fr>
+   @author Gustavo Sverzut Barbieri <barbieri@@profusion.mobi>
+   @author Raphael Kubo da Costa <kubo@@profusion.mobi>
+   @author Mathieu Taillefumier <mathieu.taillefumier@@free.fr>
+   @author Albin "Lutin" Tonnerre <albin.tonnerre@@gmail.com>
+   @author Adam Simpkins <adam@@adamsimpkins.net>
+   @author Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
+
+   Please contact <enlightenment-devel@lists.sourceforge.net> to get in
+   contact with the developers and maintainers.
+ */
+
+#ifndef _EET_H
+#define _EET_H
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <Eina.h>
+
+#ifdef EAPI
+# undef EAPI
+#endif /* ifdef EAPI */
+
+#ifdef _WIN32
+# ifdef EFL_EET_BUILD
+#  ifdef DLL_EXPORT
+#   define EAPI __declspec(dllexport)
+#  else /* ifdef DLL_EXPORT */
+#   define EAPI
+#  endif /* ! DLL_EXPORT */
+# else /* ifdef EFL_EET_BUILD */
+#  define EAPI __declspec(dllimport)
+# endif /* ! EFL_EET_BUILD */
+#else /* ifdef _WIN32 */
+# ifdef __GNUC__
+#  if __GNUC__ >= 4
+#   define EAPI __attribute__ ((visibility("default")))
+#  else /* if __GNUC__ >= 4 */
+#   define EAPI
+#  endif /* if __GNUC__ >= 4 */
+# else /* ifdef __GNUC__ */
+#  define EAPI
+# endif /* ifdef __GNUC__ */
+#endif /* ! _WIN32 */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* ifdef __cplusplus */
+
+/**
+ * @file Eet.h
+ * @brief The file that provides the eet functions.
+ *
+ * This header provides the Eet management functions.
+ *
+ */
+
+#define EET_VERSION_MAJOR 1
+#define EET_VERSION_MINOR 4
+/**
+ * @typedef Eet_Version
+ *
+ * This is the Eet version information structure that can be used at
+ * runtime to detect which version of eet is being used and adapt
+ * appropriately as follows for example:
+ *
+ * @code
+ * #if defined(EET_VERSION_MAJOR) && (EET_VERSION_MAJOR >= 1) && defined(EET_VERSION_MINOR) && (EET_VERSION_MINOR > 2)
+ * printf("Eet version: %i.%i.%i\n",
+ *        eet_version->major,
+ *        eet_version->minor,
+ *        eet_version->micro);
+ * if (eet_version->revision > 0)
+ *   {
+ *     printf("  Built from SVN revision # %i\n", eet_version->revision);
+ *   }
+ * #endif
+ * @endcode
+ *
+ * Note the #if check can be dropped if your program refuses to compile or
+ * work with an Eet version less than 1.3.0.
+ */
+typedef struct _Eet_Version
+{
+   int major; /** < major (binary or source incompatible changes) */
+   int minor; /** < minor (new features, bugfixes, major improvements version) */
+   int micro; /** < micro (bugfix, internal improvements, no new features version) */
+   int revision; /** < svn revision (0 if a proper rlease or the svn revsion number Eet is built from) */
+} Eet_Version;
+
+EAPI extern Eet_Version *eet_version;
+
+/**
+ * @defgroup Eet_Group Top level functions
+ * Functions that affect Eet as a whole.
+ *
+ * @{
+ */
+
+/**
+ * @enum _Eet_Error
+ * All the error identifiers known by Eet.
+ */
+typedef enum _Eet_Error
+{
+   EET_ERROR_NONE, /**< No error, it's all fine! */
+   EET_ERROR_BAD_OBJECT, /**< Given object or handle is NULL or invalid */
+   EET_ERROR_EMPTY, /**< There was nothing to do */
+   EET_ERROR_NOT_WRITABLE, /**< Could not write to file or file is #EET_FILE_MODE_READ */
+   EET_ERROR_OUT_OF_MEMORY, /**< Could not allocate memory */
+   EET_ERROR_WRITE_ERROR, /**< Failed to write data to destination */
+   EET_ERROR_WRITE_ERROR_FILE_TOO_BIG, /**< Failed to write file since it is too big */
+   EET_ERROR_WRITE_ERROR_IO_ERROR, /**< Failed to write due a generic Input/Output error */
+   EET_ERROR_WRITE_ERROR_OUT_OF_SPACE, /**< Failed to write due out of space */
+   EET_ERROR_WRITE_ERROR_FILE_CLOSED, /**< Failed to write because file was closed */
+   EET_ERROR_MMAP_FAILED, /**< Could not mmap file */
+   EET_ERROR_X509_ENCODING_FAILED, /**< Could not encode using X509 */
+   EET_ERROR_SIGNATURE_FAILED, /**< Could not validate signature */
+   EET_ERROR_INVALID_SIGNATURE, /**< Signature is invalid */
+   EET_ERROR_NOT_SIGNED, /**< File or contents are not signed */
+   EET_ERROR_NOT_IMPLEMENTED, /**< Function is not implemented */
+   EET_ERROR_PRNG_NOT_SEEDED, /**< Could not introduce random seed */
+   EET_ERROR_ENCRYPT_FAILED, /**< Could not encrypt contents */
+   EET_ERROR_DECRYPT_FAILED /**< Could not decrypt contents */
+} Eet_Error; /**< Eet error identifiers */
+
+/**
+ * @}
+ */
+
+/**
+ * Initialize the EET library.
+ *
+ * The first time this function is called, it will perform all the internal
+ * initialization required for the library to function properly and incrememnt
+ * the initializiation counter. Any subsequent call only increment this counter
+ * and return its new value, so it's safe to call this function more than once.
+ *
+ * @return The new init count. Will be 0 if initialization failed.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Group
+ */
+EAPI int
+eet_init(void);
+
+/**
+ * Shut down the EET library.
+ *
+ * If eet_init() was called more than once for the running application,
+ * eet_shutdown() will decrement the initialization counter and return its
+ * new value, without doing anything else. When the counter reaches 0, all
+ * of the internal elements will be shutdown and any memory used freed.
+ *
+ * @return The new init count.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Group
+ */
+EAPI int
+eet_shutdown(void);
+
+/**
+ * Clear eet cache
+ *
+ * For a faster access to previously accessed data, Eet keeps an internal
+ * cache of files. These files will be freed automatically only when
+ * they are unused and the cache gets full, in order based on the last time
+ * they were used.
+ * On systems with little memory this may present an unnecessary constraint,
+ * so eet_clearcache() is available for users to reclaim the memory used by
+ * files that are no longer needed. Those that were open using
+ * ::EET_FILE_MODE_WRITE or ::EET_FILE_MODE_READ_WRITE and have modifications,
+ * will be written down to disk before flushing them from memory.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Group
+ */
+EAPI void
+eet_clearcache(void);
+
+/**
+ * @defgroup Eet_File_Group Eet File Main Functions
+ *
+ * Functions to create, destroy and do basic manipulation of
+ * #Eet_File handles.
+ *
+ * This sections explains how to use the most basic Eet functions, which
+ * are used to work with eet files, read data from them, store it back in or
+ * take a look at what entries it contains, without making use of the
+ * serialization capabilities explained in @ref Eet_Data_Group.
+ *
+ * The following example will serve as an introduction to most, if not all,
+ * of these functions.
+ *
+ * If you are only using Eet, this is the only header you need to include.
+ * @dontinclude eet-file.c
+ * @skipline Eet.h
+ *
+ * Now let's create ourselves an eet file to play with. The following function
+ * shows step by step how to open a file and write some data in it.
+ * First, we define our file handler and some other things we'll put in it.
+ * @line static int
+ * @skip Eet_File
+ * @until ";
+ * @skip eet_open
+ *
+ * We open a new file in write mode, and if it fails, we just return, since
+ * there's not much more we can do about it..
+ * @until return
+ *
+ * Now, we need to write some data in our file. For now, strings will suffice,
+ * so let's just dump a bunch of them in there.
+ * @until }
+ *
+ * As you can see, we copied a string into our static buffer, which is a bit
+ * bigger than the full length of the string, and then told Eet to write it
+ * into the file, compressed, returning the size of the data written into the
+ * file.
+ * This is all to show that Eet treats data as just data. It doesn't matter
+ * what that data represents (for now), it's all just bytes for it. As running
+ * the following code will show, we took a string of around 30 bytes and put it
+ * in a buffer of 1024 bytes, but the returned size won't be any of those.
+ * @until printf
+ *
+ * Next, we copy into our buffer our set of strings, including their null
+ * terminators and write them into the file. No error checking for the sake
+ * of brevitiy. And a call to eet_sync() to make sure all out data is
+ * properly written down to disk, even though we haven't yet closed the file.
+ * @until eet_sync
+ *
+ * One more write, this time our large array of binary data and... well, I
+ * couldn't come up with a valid use of the last set of strings we stored,
+ * so let's take it out from the file with eet_delete().
+ * @until eet_delete
+ *
+ * Finally, we close the file, saving any changes back to disk and return.
+ * Notice how, if there's any error closing the file or saving its contents,
+ * the return value from the function will be a false one, which later on
+ * will make the program exit with an error code.
+ * @until return
+ *
+ * Moving onto our main function, we will open the same file and read it back.
+ * Trivial, but it'll show how we can do so in more than one way. We'll skip
+ * the variable declarations, as they aren't very different from what we've
+ * seen already.
+ *
+ * We start from the beginning by initializing Eet so things in general work.
+ * Forgetting to do so will result in weird results or crashes when calling
+ * any eet function, so if you experience something like that, the first thing
+ * to look at is whether eet_init() is missing.
+ * Then we call our @p create_eet_file function, described above, to make
+ * sure we have something to work with. If the function fails it will return
+ * 0 and we just exit, since nothing from here onwards will work anyway.
+ * @skip eet_init
+ * @until return
+ *
+ * Let's take a look now at what entries our file has. For this, we use
+ * eet_list(), which will return a list of strings, each being the name of
+ * one entry. Since we skipped before, it may be worth noting that @p list
+ * is declared as a @p char **.
+ * The @p num parameter will, of course, have the number of entries contained
+ * in our file.
+ * If everything's fine, we'll get our list and print it to the screen, and
+ * once done with it, we free the list. That's just the list, not its contents,
+ * as they are internal strings used by Eet and trying to free them will surely
+ * break things.
+ * @until }
+ *
+ * Reading back plain data is simple. Just a call to eet_read() with the file
+ * to read from, and the name of the entry we are interested in. We get back
+ * our data and the passed @p size parameter will contain the size of it. If
+ * the data was stored compressed, it will decompressed first.
+ * @until }
+ *
+ * Another simple read for the set of strings from before, except those were
+ * deleted, so we should get a NULL return and continue normally.
+ * @until }
+ *
+ * Finally, we'll get our binary data in the same way we got the strings. Once
+ * again, it makes no difference for Eet what the data is, it's up to us to
+ * know how to handle it.
+ * @until {
+ *
+ * Now some cheating, we know that this data is an Eet file because, well...
+ * we just know it. So we are going to open it and take a look at its insides.
+ * For this, eet_open() won't work, as it needs to have a file on disk to read
+ * from and all we have is some data in RAM.
+ *
+ * So how do we do? One way would be to create a normal file and write down
+ * our data, then open it with eet_open(). Another, faster and more efficient
+ * if all we want to do is read the file, is to use eet_memopen_read().
+ * @until memopen
+ *
+ * As you can see, the size we got from our previous read was put to good use
+ * this time. Unlike the first one where all we had were strings, the size
+ * of the data read only serves to demonstrate that we are reading back the
+ * entire size of our original @p buf variable.
+ *
+ * A little peeking to see how many entries the file has and to make an
+ * example of eet_num_entries() to get that number when we don't care about
+ * their names.
+ * @until printf
+ *
+ * More cheating follows. Just like we knew this was an Eet file, we also know
+ * what key to read from, and ontop of that we know that the data in it is not
+ * compressed.
+ * Knowing all this allows us to take some shortcuts.
+ * @until read_direct
+ *
+ * That's a direct print of our data, whatever that data is. We don't want
+ * to worry about having to free it later, so we just used eet_direct_read()
+ * to tell Eet to gives a pointer to the internal data in the file, without
+ * duplicating it. Since we said that data was not compressed, we shouldn't
+ * worry about printing garbage to the screen (and yes, we also know the data
+ * is yet another string).
+ * We also don't care about the size of the data as it was stored in the file,
+ * so we passed NULL as the size parameter.
+ * One very important note about this, however, is that we don't care about
+ * the size parameter because the data in the file contains the null
+ * terminator for the string. So when using Eet to store strings this way,
+ * it's very important to consider whether you will keep that final null
+ * byte, or to always get the size read and do the necessary checks and copies.
+ * It's up to the user and the particular use cases to decide how this will
+ * be done.
+ *
+ * With everything done, close this second file and free the data used to open
+ * it. And this is important, we can't free that data until we are done with
+ * the file, as Eet is using it. When opening with eet_memopen_read(), the data
+ * passed to it must be available for as long as the the file is open.
+ * @until }
+ *
+ * Finally, we close the first file, shutdown all internal resources used by
+ * Eet and leave our main function, thus terminating our program.
+ * @until return
+ *
+ * You can look at the full code of the example @ref eet-file.c "here".
+ * @{
+ */
+
+/**
+ * @enum _Eet_File_Mode
+ * Modes that a file can be opened.
+ */
+typedef enum _Eet_File_Mode
+{
+   EET_FILE_MODE_INVALID = -1,
+   EET_FILE_MODE_READ, /**< File is read-only. */
+   EET_FILE_MODE_WRITE, /**< File is write-only. */
+   EET_FILE_MODE_READ_WRITE /**< File is for both read and write */
+} Eet_File_Mode; /**< Modes that a file can be opened. */
+
+/**
+ * @typedef Eet_File
+ * Opaque handle that defines an Eet file (or memory).
+ *
+ * This handle will be returned by the functions eet_open() and
+ * eet_memopen_read() and is used by every other function that affects the
+ * file in any way. When you are done with it, call eet_close() to clsoe it
+ * and, if the file was open for writing, write down to disk any changes made
+ * to it.
+ *
+ * @see eet_open()
+ * @see eet_memopen_read()
+ * @see eet_close()
+ */
+typedef struct _Eet_File Eet_File;
+
+/**
+ * @typedef Eet_Dictionary
+ * Opaque handle that defines a file-backed (mmaped) dictionary of strings.
+ */
+typedef struct _Eet_Dictionary Eet_Dictionary;
+
+/**
+ * @}
+ */
+
+/**
+ * Open an eet file on disk, and returns a handle to it.
+ * @param file The file path to the eet file. eg: @c "/tmp/file.eet".
+ * @param mode The mode for opening. Either #EET_FILE_MODE_READ,
+ *        #EET_FILE_MODE_WRITE or #EET_FILE_MODE_READ_WRITE.
+ * @return An opened eet file handle.
+ * @ingroup Eet_File_Group
+ *
+ * This function will open an exiting eet file for reading, and build
+ * the directory table in memory and return a handle to the file, if it
+ * exists and can be read, and no memory errors occur on the way, otherwise
+ * NULL will be returned.
+ *
+ * It will also open an eet file for writing. This will, if successful,
+ * delete the original file and replace it with a new empty file, till
+ * the eet file handle is closed or flushed. If it cannot be opened for
+ * writing or a memory error occurs, NULL is returned.
+ *
+ * You can also open the file for read/write. If you then write a key that
+ * does not exist it will be created, if the key exists it will be replaced
+ * by the new data.
+ *
+ * If the same file is opened multiple times, then the same file handle will
+ * be returned as eet maintains an internal list of all currently open
+ * files. Note that it considers files opened for read only and those opened
+ * for read/write and write only as 2 separate sets. Those that do not write
+ * to the file and those that do. Eet will allow 2 handles to the same file
+ * if they are in the 2 separate lists/groups. That means opening a file for
+ * read only looks in the read only set, and returns a handle to that file
+ * handle and increments its reference count. If you open a file for read/write
+ * or write only it looks in the write set and returns a handle after
+ * incrementing the reference count. You need to close an eet file handle
+ * as many times as it has been opened to maintain correct reference counts.
+ * Files whose modified timestamp or size do not match those of the existing
+ * referenced file handles will not be returned and a new handle will be
+ * returned instead.
+ *
+ * @since 1.0.0
+ */
+EAPI Eet_File *
+eet_open(const char *file,
+         Eet_File_Mode mode);
+
+/**
+ * Open an eet file directly from a memory location. The data is not copied,
+ * so you must keep it around as long as the eet file is open. There is
+ * currently no cache for this kind of Eet_File, so it's reopened every time
+ * you use eet_memopen_read.
+ * Files opened this way will always be in read-only mode.
+ *
+ * @since 1.1.0
+ * @ingroup Eet_File_Group
+ */
+EAPI Eet_File *
+eet_memopen_read(const void *data,
+                 size_t size);
+
+/**
+ * Get the mode an Eet_File was opened with.
+ * @param ef A valid eet file handle.
+ * @return The mode ef was opened with.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Group
+ */
+EAPI Eet_File_Mode
+eet_mode_get(Eet_File *ef);
+
+/**
+ * Close an eet file handle and flush and writes pending.
+ * @param ef A valid eet file handle.
+ *
+ * This function will flush any pending writes to disk if the eet file
+ * was opened for write, and free all data associated with the file handle
+ * and file, and close the file.
+ *
+ * If the eet file handle is not valid nothing will be done.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Group
+ */
+EAPI Eet_Error
+eet_close(Eet_File *ef);
+
+/**
+ * Sync content of an eet file handle, flushing pending writes.
+ * @param ef A valid eet file handle.
+ *
+ * This function will flush any pending writes to disk. The eet file must
+ * be opened for write.
+ *
+ * If the eet file handle is not valid nothing will be done.
+ *
+ * @since 1.2.4
+ * @ingroup Eet_File_Group
+ */
+EAPI Eet_Error
+eet_sync(Eet_File *ef);
+
+/**
+ * Return a handle to the shared string dictionary of the Eet file
+ * @param ef A valid eet file handle.
+ * @return A handle to the dictionary of the file
+ *
+ * This function returns a handle to the dictionary of an Eet file whose
+ * handle is @p ef, if a dictionary exists. NULL is returned otherwise or
+ * if the file handle is known to be invalid.
+ *
+ * @see eet_dictionary_string_check() to know if given string came
+ *      from the dictionary or it was dynamically allocated using
+ *      the #Eet_Data_Descriptor_Class instructrions.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Group
+ */
+EAPI Eet_Dictionary *
+eet_dictionary_get(Eet_File *ef);
+
+/**
+ * Check if a given string comes from a given dictionary
+ * @param ed A valid dictionary handle
+ * @param string A valid 0 byte terminated C string
+ * @return 1 if it is in the dictionary, 0 otherwise
+ *
+ * This checks the given dictionary to see if the given string is actually
+ * inside that dictionary (i.e. comes from it) and returns 1 if it does.
+ * If the dictionary handle is invalid, the string is NULL or the string is
+ * not in the dictionary, 0 is returned.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Group
+ */
+EAPI int
+eet_dictionary_string_check(Eet_Dictionary *ed,
+                            const char *string);
+
+/**
+ * Read a specified entry from an eet file and return data
+ * @param ef A valid eet file handle opened for reading.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param size_ret Number of bytes read from entry and returned.
+ * @return The data stored in that entry in the eet file.
+ *
+ * This function finds an entry in the eet file that is stored under the
+ * name specified, and returns that data, decompressed, if successful.
+ * NULL is returned if the lookup fails or if memory errors are
+ * encountered. It is the job of the calling program to call free() on
+ * the returned data. The number of bytes in the returned data chunk are
+ * placed in size_ret.
+ *
+ * If the eet file handle is not valid NULL is returned and size_ret is
+ * filled with 0.
+ *
+ * @see eet_read_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Group
+ */
+EAPI void *
+eet_read(Eet_File *ef,
+         const char *name,
+         int *size_ret);
+
+/**
+ * Read a specified entry from an eet file and return data
+ * @param ef A valid eet file handle opened for reading.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param size_ret Number of bytes read from entry and returned.
+ * @return The data stored in that entry in the eet file.
+ *
+ * This function finds an entry in the eet file that is stored under the
+ * name specified, and returns that data if not compressed and successful.
+ * NULL is returned if the lookup fails or if memory errors are
+ * encountered or if the data is comrpessed. The calling program must never
+ * call free() on the returned data. The number of bytes in the returned
+ * data chunk are placed in size_ret.
+ *
+ * If the eet file handle is not valid NULL is returned and size_ret is
+ * filled with 0.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Group
+ */
+EAPI const void *
+eet_read_direct(Eet_File *ef,
+                const char *name,
+                int *size_ret);
+
+/**
+ * Write a specified entry to an eet file handle
+ * @param ef A valid eet file handle opened for writing.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param data Pointer to the data to be stored.
+ * @param size Length in bytes in the data to be stored.
+ * @param compress Compression flags (1 == compress, 0 = don't compress).
+ * @return bytes written on successful write, 0 on failure.
+ *
+ * This function will write the specified chunk of data to the eet file
+ * and return greater than 0 on success. 0 will be returned on failure.
+ *
+ * The eet file handle must be a valid file handle for an eet file opened
+ * for writing. If it is not, 0 will be returned and no action will be
+ * performed.
+ *
+ * Name, and data must not be NULL, and size must be > 0. If these
+ * conditions are not met, 0 will be returned.
+ *
+ * The data will be copied (and optionally compressed) in ram, pending
+ * a flush to disk (it will stay in ram till the eet file handle is
+ * closed though).
+ *
+ * @see eet_write_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Group
+ */
+EAPI int
+eet_write(Eet_File *ef,
+          const char *name,
+          const void *data,
+          int size,
+          int compress);
+
+/**
+ * Delete a specified entry from an Eet file being written or re-written
+ * @param ef A valid eet file handle opened for writing.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @return Success or failure of the delete.
+ *
+ * This function will delete the specified chunk of data from the eet file
+ * and return greater than 0 on success. 0 will be returned on failure.
+ *
+ * The eet file handle must be a valid file handle for an eet file opened
+ * for writing. If it is not, 0 will be returned and no action will be
+ * performed.
+ *
+ * Name, must not be NULL, otherwise 0 will be returned.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Group
+ */
+EAPI int
+eet_delete(Eet_File *ef,
+           const char *name);
+
+/**
+ * Alias a specific section to another one. Destination may exist or not,
+ * no check are done.
+ * @param ef A valid eet file handle opened for writing.
+ * @param name Name of the new entry. eg: "/base/file_i_want".
+ * @param destination Actual source of the aliased entry eg: "/base/the_real_stuff_i_want".
+ * @param compress Compression flags (1 == compress, 0 = don't compress).
+ * @return EINA_TRUE on success, EINA_FALSE on failure.
+ *
+ * Name and Destination must not be NULL, otherwise EINA_FALSE will be returned.
+ * The equivalent of this would be calling 'ln -s destination name'
+ *
+ * @since 1.3.3
+ * @ingroup Eet_File_Group
+ */
+EAPI Eina_Bool
+eet_alias(Eet_File *ef,
+          const char *name,
+          const char *destination,
+          int compress);
+
+/**
+ * Retrieve the destination name of an alias
+ * @param ef A valid eet file handle opened for writing
+ * @param name Name of the entry. eg: "/base/file_i_want"
+ * @return Destination of the alias. eg: "/base/the_real_stuff_i_want", NULL on failure
+ *
+ * Name must not be NULL, otherwise NULL will be returned.
+ *
+ * @since 1.5
+ * @ingroup Eet_File_Group
+ */
+EAPI const char *
+eet_alias_get(Eet_File *ef,
+              const char *name);
+
+/**
+ * List all entries in eet file matching shell glob.
+ * @param ef A valid eet file handle.
+ * @param glob A shell glob to match against.
+ * @param count_ret Number of entries found to match.
+ * @return Pointer to an array of strings.
+ *
+ * This function will list all entries in the eet file matching the
+ * supplied shell glob and return an allocated list of their names, if
+ * there are any, and if no memory errors occur.
+ *
+ * The eet file handle must be valid and glob must not be NULL, or NULL
+ * will be returned and count_ret will be filled with 0.
+ *
+ * The calling program must call free() on the array returned, but NOT
+ * on the string pointers in the array. They are taken as read-only
+ * internals from the eet file handle. They are only valid as long as
+ * the file handle is not closed. When it is closed those pointers in the
+ * array are now not valid and should not be used.
+ *
+ * On success the array returned will have a list of string pointers
+ * that are the names of the entries that matched, and count_ret will have
+ * the number of entries in this array placed in it.
+ *
+ * Hint: an easy way to list all entries in an eet file is to use a glob
+ * value of "*".
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Group
+ */
+EAPI char **
+eet_list(Eet_File *ef,
+         const char *glob,
+         int *count_ret);
+
+/**
+ * Return the number of entries in the specified eet file.
+ * @param ef A valid eet file handle.
+ * @return Number of entries in ef or -1 if the number of entries
+ *         cannot be read due to open mode restrictions.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Group
+ */
+EAPI int
+eet_num_entries(Eet_File *ef);
+
+/**
+ * @defgroup Eet_File_Cipher_Group Eet File Ciphered Main Functions
+ *
+ * Most of the @ref Eet_File_Group have alternative versions that
+ * accounts for ciphers to protect their content.
+ *
+ * @see @ref Eet_Cipher_Group
+ *
+ * @ingroup Eet_File_Group
+ */
+
+/**
+ * Read a specified entry from an eet file and return data using a cipher.
+ * @param ef A valid eet file handle opened for reading.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param size_ret Number of bytes read from entry and returned.
+ * @param cipher_key The key to use as cipher.
+ * @return The data stored in that entry in the eet file.
+ *
+ * This function finds an entry in the eet file that is stored under the
+ * name specified, and returns that data, decompressed, if successful.
+ * NULL is returned if the lookup fails or if memory errors are
+ * encountered. It is the job of the calling program to call free() on
+ * the returned data. The number of bytes in the returned data chunk are
+ * placed in size_ret.
+ *
+ * If the eet file handle is not valid NULL is returned and size_ret is
+ * filled with 0.
+ *
+ * @see eet_read()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Cipher_Group
+ */
+EAPI void *
+eet_read_cipher(Eet_File *ef,
+                const char *name,
+                int *size_ret,
+                const char *cipher_key);
+
+/**
+ * Write a specified entry to an eet file handle using a cipher.
+ * @param ef A valid eet file handle opened for writing.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param data Pointer to the data to be stored.
+ * @param size Length in bytes in the data to be stored.
+ * @param compress Compression flags (1 == compress, 0 = don't compress).
+ * @param cipher_key The key to use as cipher.
+ * @return bytes written on successful write, 0 on failure.
+ *
+ * This function will write the specified chunk of data to the eet file
+ * and return greater than 0 on success. 0 will be returned on failure.
+ *
+ * The eet file handle must be a valid file handle for an eet file opened
+ * for writing. If it is not, 0 will be returned and no action will be
+ * performed.
+ *
+ * Name, and data must not be NULL, and size must be > 0. If these
+ * conditions are not met, 0 will be returned.
+ *
+ * The data will be copied (and optionally compressed) in ram, pending
+ * a flush to disk (it will stay in ram till the eet file handle is
+ * closed though).
+ *
+ * @see eet_write()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Cipher_Group
+ */
+EAPI int
+eet_write_cipher(Eet_File *ef,
+                 const char *name,
+                 const void *data,
+                 int size,
+                 int compress,
+                 const char *cipher_key);
+
+/**
+ * @defgroup Eet_File_Image_Group Image Store and Load
+ *
+ * Eet efficiently stores and loads images, including alpha
+ * channels and lossy compressions.
+ *
+ * Eet can handle both lossy compression with different levels of quality and
+ * non-lossy compression with different compression levels. It's also possible,
+ * given an image data, to only read its header to get the image information
+ * without decoding the entire content for it.
+ *
+ * The encode family of functions will take an image raw buffer and its
+ * parameters and compress it in memory, returning the new buffer.
+ * Likewise, the decode functions will read from the given location in memory
+ * and return the uncompressed image.
+ *
+ * The read and write functions will, respectively, encode and decode to or
+ * from an Eet file, under the specified key.
+ *
+ * These functions are fairly low level and the same functionality can be
+ * achieved using Evas and Edje, making it much easier to work with images
+ * as well as not needing to worry about things like scaling them.
+ */
+
+/**
+ * Read just the header data for an image and dont decode the pixels.
+ * @param ef A valid eet file handle opened for reading.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param w A pointer to the unsigned int to hold the width in pixels.
+ * @param h A pointer to the unsigned int to hold the height in pixels.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return 1 on successful decode, 0 otherwise
+ *
+ * Reads and decodes the image header data stored under the given key and
+ * Eet file.
+ *
+ * The information decoded is placed in each of the parameters, which must be
+ * provided. The width and height, measured in pixels, will be stored under
+ * the variables pointed by @p w and @p h, respectively. If the read or
+ * decode of the header fails, this values will be 0. The @p alpha parameter
+ * will be 1 or 0, denoting if the alpha channel of the image is used or not.
+ * If the image was losslessly compressed, the @p compress parameter will hold
+ * the compression amount used, ranging from 0 to 9 and @p lossy will be 0.
+ * In the case of lossy compression, @p lossy will be 1, and the compression
+ * quality will be placed under @p quality, with a value ranging from 0 to 100.
+ *
+ * @see eet_data_image_header_decode()
+ * @see eet_data_image_header_read_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Group
+ */
+EAPI int
+eet_data_image_header_read(Eet_File *ef,
+                           const char *name,
+                           unsigned int *w,
+                           unsigned int *h,
+                           int *alpha,
+                           int *compress,
+                           int *quality,
+                           int *lossy);
+
+/**
+ * Read image data from the named key in the eet file.
+ * @param ef A valid eet file handle opened for reading.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param w A pointer to the unsigned int to hold the width in pixels.
+ * @param h A pointer to the unsigned int to hold the height in pixels.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return The image pixel data decoded
+ *
+ * Reads and decodes the image stored in the given Eet file under the named
+ * key.
+ *
+ * The returned pixel data is a linear array of pixels starting from the
+ * top-left of the image, scanning row by row from left to right. Each pile
+ * is a 32bit value, with the high byte being the alpha channel, the next being
+ * red, then green, and the low byte being blue.
+ *
+ * The rest of the parameters are the same as in eet_data_image_header_read().
+ *
+ * On success the function returns a pointer to the image data decoded. The
+ * calling application is responsible for calling free() on the image data
+ * when it is done with it. On failure NULL is returned and the parameter
+ * values may not contain any sensible data.
+ *
+ * @see eet_data_image_header_read()
+ * @see eet_data_image_decode()
+ * @see eet_data_image_read_cipher()
+ * @see eet_data_image_read_to_surface()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Group
+ */
+EAPI void *
+eet_data_image_read(Eet_File *ef,
+                    const char *name,
+                    unsigned int *w,
+                    unsigned int *h,
+                    int *alpha,
+                    int *compress,
+                    int *quality,
+                    int *lossy);
+
+/**
+ * Read image data from the named key in the eet file and store it in the given buffer.
+ * @param ef A valid eet file handle opened for reading.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param src_x The starting x coordinate from where to dump the stream.
+ * @param src_y The starting y coordinate from where to dump the stream.
+ * @param d A pointer to the pixel surface.
+ * @param w The expected width in pixels of the pixel surface to decode.
+ * @param h The expected height in pixels of the pixel surface to decode.
+ * @param row_stride The length of a pixels line in the destination surface.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return 1 on success, 0 otherwise.
+ *
+ * Reads and decodes the image stored in the given Eet file, placing the
+ * resulting pixel data in the buffer pointed by the user.
+ *
+ * Like eet_data_image_read(), it takes the image data stored under the
+ * @p name key in the @p ef file, but instead of returning a new buffer with
+ * the pixel data, it places the result in the buffer pointed by @p d, which
+ * must be provided by the user and of sufficient size to hold the requested
+ * portion of the image.
+ *
+ * The @p src_x and @p src_y parameters indicate the top-left corner of the
+ * section of the image to decode. These have to be higher or equal than 0 and
+ * less than the respective total width and height of the image. The width
+ * and height of the section of the image to decode are given in @p w and @p h
+ * and also can't be higher than the total width and height of the image.
+ *
+ * The @p row_stride parameter indicates the length in bytes of each line in
+ * the destination buffer and it has to be at least @p w * 4.
+ *
+ * All the other parameters are the same as in eet_data_image_read().
+ *
+ * On success the function returns 1, and 0 on failure. On failure the
+ * parameter values may not contain any sensible data.
+ *
+ * @see eet_data_image_read()
+ * @see eet_data_image_decode()
+ * @see eet_data_image_decode_to_surface()
+ * @see eet_data_image_read_to_surface_cipher()
+ *
+ * @since 1.0.2
+ * @ingroup Eet_File_Image_Group
+ */
+EAPI int
+eet_data_image_read_to_surface(Eet_File *ef,
+                               const char *name,
+                               unsigned int src_x,
+                               unsigned int src_y,
+                               unsigned int *d,
+                               unsigned int w,
+                               unsigned int h,
+                               unsigned int row_stride,
+                               int *alpha,
+                               int *compress,
+                               int *quality,
+                               int *lossy);
+
+/**
+ * Write image data to the named key in an eet file.
+ * @param ef A valid eet file handle opened for writing.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param data A pointer to the image pixel data.
+ * @param w The width of the image in pixels.
+ * @param h The height of the image in pixels.
+ * @param alpha The alpha channel flag.
+ * @param compress The compression amount.
+ * @param quality The quality encoding amount.
+ * @param lossy The lossiness flag.
+ * @return Success if the data was encoded and written or not.
+ *
+ * This function takes image pixel data and encodes it in an eet file
+ * stored under the supplied name key, and returns how many bytes were
+ * actually written to encode the image data.
+ *
+ * The data expected is the same format as returned by eet_data_image_read.
+ * If this is not the case weird things may happen. Width and height must
+ * be between 1 and 8000 pixels. The alpha flags can be 0 or 1 (0 meaning
+ * the alpha values are not useful and 1 meaning they are). Compress can
+ * be from 0 to 9 (0 meaning no compression, 9 meaning full compression).
+ * This is only used if the image is not lossily encoded. Quality is used on
+ * lossy compression and should be a value from 0 to 100. The lossy flag
+ * can be 0 or 1. 0 means encode losslessly and 1 means to encode with
+ * image quality loss (but then have a much smaller encoding).
+ *
+ * On success this function returns the number of bytes that were required
+ * to encode the image data, or on failure it returns 0.
+ *
+ * @see eet_data_image_read()
+ * @see eet_data_image_encode()
+ * @see eet_data_image_write_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Group
+ */
+EAPI int
+eet_data_image_write(Eet_File *ef,
+                     const char *name,
+                     const void *data,
+                     unsigned int w,
+                     unsigned int h,
+                     int alpha,
+                     int compress,
+                     int quality,
+                     int lossy);
+
+/**
+ * Decode Image data header only to get information.
+ * @param data The encoded pixel data.
+ * @param size The size, in bytes, of the encoded pixel data.
+ * @param w A pointer to the unsigned int to hold the width in pixels.
+ * @param h A pointer to the unsigned int to hold the height in pixels.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return 1 on success, 0 on failure.
+ *
+ * This function works exactly like eet_data_image_header_read(), but instead
+ * of reading from an Eet file, it takes the buffer of size @p size pointed
+ * by @p data, which must be a valid Eet encoded image.
+ *
+ * On success the function returns 1 indicating the header was read and
+ * decoded properly, or 0 on failure.
+ *
+ * @see eet_data_image_header_read()
+ * @see eet_data_image_header_decode_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Group
+ */
+EAPI int
+eet_data_image_header_decode(const void *data,
+                             int size,
+                             unsigned int *w,
+                             unsigned int *h,
+                             int *alpha,
+                             int *compress,
+                             int *quality,
+                             int *lossy);
+
+/**
+ * Decode Image data into pixel data.
+ * @param data The encoded pixel data.
+ * @param size The size, in bytes, of the encoded pixel data.
+ * @param w A pointer to the unsigned int to hold the width in pixels.
+ * @param h A pointer to the unsigned int to hold the height in pixels.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return The image pixel data decoded
+ *
+ * This function takes encoded pixel data and decodes it into raw RGBA
+ * pixels on success.
+ *
+ * It works exactly like eet_data_image_read(), but it takes the encoded
+ * data in the @p data buffer of size @p size, instead of reading from a file.
+ * All the others parameters are also the same.
+ *
+ * On success the function returns a pointer to the image data decoded. The
+ * calling application is responsible for calling free() on the image data
+ * when it is done with it. On failure NULL is returned and the parameter
+ * values may not contain any sensible data.
+ *
+ * @see eet_data_image_read()
+ * @see eet_data_image_decode_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Group
+ */
+EAPI void *
+eet_data_image_decode(const void *data,
+                      int size,
+                      unsigned int *w,
+                      unsigned int *h,
+                      int *alpha,
+                      int *compress,
+                      int *quality,
+                      int *lossy);
+
+/**
+ * Decode Image data into pixel data and stores in the given buffer.
+ * @param data The encoded pixel data.
+ * @param size The size, in bytes, of the encoded pixel data.
+ * @param src_x The starting x coordinate from where to dump the stream.
+ * @param src_y The starting y coordinate from where to dump the stream.
+ * @param d A pointer to the pixel surface.
+ * @param w The expected width in pixels of the pixel surface to decode.
+ * @param h The expected height in pixels of the pixel surface to decode.
+ * @param row_stride The length of a pixels line in the destination surface.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return 1 on success, 0 otherwise.
+ *
+ * Like eet_data_image_read_to_surface(), but reading the given @p data buffer
+ * instead of a file.
+ *
+ * On success the function returns 1, and 0 on failure. On failure the
+ * parameter values may not contain any sensible data.
+ *
+ * @see eet_data_image_read_to_surface()
+ * @see eet_data_image_decode_to_surface_cipher()
+ *
+ * @since 1.0.2
+ * @ingroup Eet_File_Image_Group
+ */
+EAPI int
+eet_data_image_decode_to_surface(const void *data,
+                                 int size,
+                                 unsigned int src_x,
+                                 unsigned int src_y,
+                                 unsigned int *d,
+                                 unsigned int w,
+                                 unsigned int h,
+                                 unsigned int row_stride,
+                                 int *alpha,
+                                 int *compress,
+                                 int *quality,
+                                 int *lossy);
+
+/**
+ * Encode image data for storage or transmission.
+ * @param data A pointer to the image pixel data.
+ * @param size_ret A pointer to an int to hold the size of the returned data.
+ * @param w The width of the image in pixels.
+ * @param h The height of the image in pixels.
+ * @param alpha The alpha channel flag.
+ * @param compress The compression amount.
+ * @param quality The quality encoding amount.
+ * @param lossy The lossiness flag.
+ * @return The encoded image data.
+ *
+ * This function stakes image pixel data and encodes it with compression and
+ * possible loss of quality (as a trade off for size) for storage or
+ * transmission to another system.
+ *
+ * It works like eet_data_image_write(), but instead of writing the encoded
+ * image into an Eet file, it allocates a new buffer of the size required and
+ * returns the encoded data in it.
+ *
+ * On success this function returns a pointer to the encoded data that you
+ * can free with free() when no longer needed.
+ *
+ * @see eet_data_image_write()
+ * @see eet_data_image_read()
+ * @see eet_data_image_encode_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Group
+ */
+EAPI void *
+eet_data_image_encode(const void *data,
+                      int *size_ret,
+                      unsigned int w,
+                      unsigned int h,
+                      int alpha,
+                      int compress,
+                      int quality,
+                      int lossy);
+
+/**
+ * @defgroup Eet_File_Image_Cipher_Group Image Store and Load using a Cipher
+ *
+ * Most of the @ref Eet_File_Image_Group have alternative versions
+ * that accounts for ciphers to protect their content.
+ *
+ * @see @ref Eet_Cipher_Group
+ *
+ * @ingroup Eet_File_Image_Group
+ */
+
+/**
+ * Read just the header data for an image and dont decode the pixels using a cipher.
+ * @param ef A valid eet file handle opened for reading.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param cipher_key The key to use as cipher.
+ * @param w A pointer to the unsigned int to hold the width in pixels.
+ * @param h A pointer to the unsigned int to hold the height in pixels.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return 1 on successful decode, 0 otherwise
+ *
+ * This function reads an image from an eet file stored under the named
+ * key in the eet file and return a pointer to the decompressed pixel data.
+ *
+ * The other parameters of the image (width, height etc.) are placed into
+ * the values pointed to (they must be supplied). The pixel data is a linear
+ * array of pixels starting from the top-left of the image scanning row by
+ * row from left to right. Each pixel is a 32bit value, with the high byte
+ * being the alpha channel, the next being red, then green, and the low byte
+ * being blue. The width and height are measured in pixels and will be
+ * greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes
+ * that the alpha channel is not used. 1 denotes that it is significant.
+ * Compress is filled with the compression value/amount the image was
+ * stored with. The quality value is filled with the quality encoding of
+ * the image file (0 - 100). The lossy flags is either 0 or 1 as to if
+ * the image was encoded lossily or not.
+ *
+ * On success the function returns 1 indicating the header was read and
+ * decoded properly, or 0 on failure.
+ *
+ * @see eet_data_image_header_read()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Cipher_Group
+ */
+EAPI int
+eet_data_image_header_read_cipher(Eet_File *ef,
+                                  const char *name,
+                                  const char *cipher_key,
+                                  unsigned int *w,
+                                  unsigned int *h,
+                                  int *alpha,
+                                  int *compress,
+                                  int *quality,
+                                  int *lossy);
+
+/**
+ * Read image data from the named key in the eet file using a cipher.
+ * @param ef A valid eet file handle opened for reading.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param cipher_key The key to use as cipher.
+ * @param w A pointer to the unsigned int to hold the width in pixels.
+ * @param h A pointer to the unsigned int to hold the height in pixels.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return The image pixel data decoded
+ *
+ * This function reads an image from an eet file stored under the named
+ * key in the eet file and return a pointer to the decompressed pixel data.
+ *
+ * The other parameters of the image (width, height etc.) are placed into
+ * the values pointed to (they must be supplied). The pixel data is a linear
+ * array of pixels starting from the top-left of the image scanning row by
+ * row from left to right. Each pixel is a 32bit value, with the high byte
+ * being the alpha channel, the next being red, then green, and the low byte
+ * being blue. The width and height are measured in pixels and will be
+ * greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes
+ * that the alpha channel is not used. 1 denotes that it is significant.
+ * Compress is filled with the compression value/amount the image was
+ * stored with. The quality value is filled with the quality encoding of
+ * the image file (0 - 100). The lossy flags is either 0 or 1 as to if
+ * the image was encoded lossily or not.
+ *
+ * On success the function returns a pointer to the image data decoded. The
+ * calling application is responsible for calling free() on the image data
+ * when it is done with it. On failure NULL is returned and the parameter
+ * values may not contain any sensible data.
+ *
+ * @see eet_data_image_read()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Cipher_Group
+ */
+EAPI void *
+eet_data_image_read_cipher(Eet_File *ef,
+                           const char *name,
+                           const char *cipher_key,
+                           unsigned int *w,
+                           unsigned int *h,
+                           int *alpha,
+                           int *compress,
+                           int *quality,
+                           int *lossy);
+
+/**
+ * Read image data from the named key in the eet file using a cipher.
+ * @param ef A valid eet file handle opened for reading.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param cipher_key The key to use as cipher.
+ * @param src_x The starting x coordinate from where to dump the stream.
+ * @param src_y The starting y coordinate from where to dump the stream.
+ * @param d A pointer to the pixel surface.
+ * @param w The expected width in pixels of the pixel surface to decode.
+ * @param h The expected height in pixels of the pixel surface to decode.
+ * @param row_stride The length of a pixels line in the destination surface.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return 1 on success, 0 otherwise.
+ *
+ * This function reads an image from an eet file stored under the named
+ * key in the eet file and return a pointer to the decompressed pixel data.
+ *
+ * The other parameters of the image (width, height etc.) are placed into
+ * the values pointed to (they must be supplied). The pixel data is a linear
+ * array of pixels starting from the top-left of the image scanning row by
+ * row from left to right. Each pixel is a 32bit value, with the high byte
+ * being the alpha channel, the next being red, then green, and the low byte
+ * being blue. The width and height are measured in pixels and will be
+ * greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes
+ * that the alpha channel is not used. 1 denotes that it is significant.
+ * Compress is filled with the compression value/amount the image was
+ * stored with. The quality value is filled with the quality encoding of
+ * the image file (0 - 100). The lossy flags is either 0 or 1 as to if
+ * the image was encoded lossily or not.
+ *
+ * On success the function returns 1, and 0 on failure. On failure the
+ * parameter values may not contain any sensible data.
+ *
+ * @see eet_data_image_read_to_surface()
+ *
+ * @since 1.0.2
+ * @ingroup Eet_File_Image_Cipher_Group
+ */
+EAPI int
+eet_data_image_read_to_surface_cipher(Eet_File *ef,
+                                      const char *name,
+                                      const char *cipher_key,
+                                      unsigned int src_x,
+                                      unsigned int src_y,
+                                      unsigned int *d,
+                                      unsigned int w,
+                                      unsigned int h,
+                                      unsigned int row_stride,
+                                      int *alpha,
+                                      int *compress,
+                                      int *quality,
+                                      int *lossy);
+
+/**
+ * Write image data to the named key in an eet file using a cipher.
+ * @param ef A valid eet file handle opened for writing.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param cipher_key The key to use as cipher.
+ * @param data A pointer to the image pixel data.
+ * @param w The width of the image in pixels.
+ * @param h The height of the image in pixels.
+ * @param alpha The alpha channel flag.
+ * @param compress The compression amount.
+ * @param quality The quality encoding amount.
+ * @param lossy The lossiness flag.
+ * @return Success if the data was encoded and written or not.
+ *
+ * This function takes image pixel data and encodes it in an eet file
+ * stored under the supplied name key, and returns how many bytes were
+ * actually written to encode the image data.
+ *
+ * The data expected is the same format as returned by eet_data_image_read.
+ * If this is not the case weird things may happen. Width and height must
+ * be between 1 and 8000 pixels. The alpha flags can be 0 or 1 (0 meaning
+ * the alpha values are not useful and 1 meaning they are). Compress can
+ * be from 0 to 9 (0 meaning no compression, 9 meaning full compression).
+ * This is only used if the image is not lossily encoded. Quality is used on
+ * lossy compression and should be a value from 0 to 100. The lossy flag
+ * can be 0 or 1. 0 means encode losslessly and 1 means to encode with
+ * image quality loss (but then have a much smaller encoding).
+ *
+ * On success this function returns the number of bytes that were required
+ * to encode the image data, or on failure it returns 0.
+ *
+ * @see eet_data_image_write()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Cipher_Group
+ */
+EAPI int
+eet_data_image_write_cipher(Eet_File *ef,
+                            const char *name,
+                            const char *cipher_key,
+                            const void *data,
+                            unsigned int w,
+                            unsigned int h,
+                            int alpha,
+                            int compress,
+                            int quality,
+                            int lossy);
+
+/**
+ * Decode Image data header only to get information using a cipher.
+ * @param data The encoded pixel data.
+ * @param cipher_key The key to use as cipher.
+ * @param size The size, in bytes, of the encoded pixel data.
+ * @param w A pointer to the unsigned int to hold the width in pixels.
+ * @param h A pointer to the unsigned int to hold the height in pixels.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return 1 on success, 0 on failure.
+ *
+ * This function takes encoded pixel data and decodes it into raw RGBA
+ * pixels on success.
+ *
+ * The other parameters of the image (width, height etc.) are placed into
+ * the values pointed to (they must be supplied). The pixel data is a linear
+ * array of pixels starting from the top-left of the image scanning row by
+ * row from left to right. Each pixel is a 32bit value, with the high byte
+ * being the alpha channel, the next being red, then green, and the low byte
+ * being blue. The width and height are measured in pixels and will be
+ * greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes
+ * that the alpha channel is not used. 1 denotes that it is significant.
+ * Compress is filled with the compression value/amount the image was
+ * stored with. The quality value is filled with the quality encoding of
+ * the image file (0 - 100). The lossy flags is either 0 or 1 as to if
+ * the image was encoded lossily or not.
+ *
+ * On success the function returns 1 indicating the header was read and
+ * decoded properly, or 0 on failure.
+ *
+ * @see eet_data_image_header_decode()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Cipher_Group
+ */
+EAPI int
+eet_data_image_header_decode_cipher(const void *data,
+                                    const char *cipher_key,
+                                    int size,
+                                    unsigned int *w,
+                                    unsigned int *h,
+                                    int *alpha,
+                                    int *compress,
+                                    int *quality,
+                                    int *lossy);
+
+/**
+ * Decode Image data into pixel data using a cipher.
+ * @param data The encoded pixel data.
+ * @param cipher_key The key to use as cipher.
+ * @param size The size, in bytes, of the encoded pixel data.
+ * @param w A pointer to the unsigned int to hold the width in pixels.
+ * @param h A pointer to the unsigned int to hold the height in pixels.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return The image pixel data decoded
+ *
+ * This function takes encoded pixel data and decodes it into raw RGBA
+ * pixels on success.
+ *
+ * The other parameters of the image (width, height etc.) are placed into
+ * the values pointed to (they must be supplied). The pixel data is a linear
+ * array of pixels starting from the top-left of the image scanning row by
+ * row from left to right. Each pixel is a 32bit value, with the high byte
+ * being the alpha channel, the next being red, then green, and the low byte
+ * being blue. The width and height are measured in pixels and will be
+ * greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes
+ * that the alpha channel is not used. 1 denotes that it is significant.
+ * Compress is filled with the compression value/amount the image was
+ * stored with. The quality value is filled with the quality encoding of
+ * the image file (0 - 100). The lossy flags is either 0 or 1 as to if
+ * the image was encoded lossily or not.
+ *
+ * On success the function returns a pointer to the image data decoded. The
+ * calling application is responsible for calling free() on the image data
+ * when it is done with it. On failure NULL is returned and the parameter
+ * values may not contain any sensible data.
+ *
+ * @see eet_data_image_decode()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Cipher_Group
+ */
+EAPI void *
+eet_data_image_decode_cipher(const void *data,
+                             const char *cipher_key,
+                             int size,
+                             unsigned int *w,
+                             unsigned int *h,
+                             int *alpha,
+                             int *compress,
+                             int *quality,
+                             int *lossy);
+
+/**
+ * Decode Image data into pixel data using a cipher.
+ * @param data The encoded pixel data.
+ * @param cipher_key The key to use as cipher.
+ * @param size The size, in bytes, of the encoded pixel data.
+ * @param src_x The starting x coordinate from where to dump the stream.
+ * @param src_y The starting y coordinate from where to dump the stream.
+ * @param d A pointer to the pixel surface.
+ * @param w The expected width in pixels of the pixel surface to decode.
+ * @param h The expected height in pixels of the pixel surface to decode.
+ * @param row_stride The length of a pixels line in the destination surface.
+ * @param alpha A pointer to the int to hold the alpha flag.
+ * @param compress A pointer to the int to hold the compression amount.
+ * @param quality A pointer to the int to hold the quality amount.
+ * @param lossy A pointer to the int to hold the lossiness flag.
+ * @return 1 on success, 0 otherwise.
+ *
+ * This function takes encoded pixel data and decodes it into raw RGBA
+ * pixels on success.
+ *
+ * The other parameters of the image (alpha, compress etc.) are placed into
+ * the values pointed to (they must be supplied). The pixel data is a linear
+ * array of pixels starting from the top-left of the image scanning row by
+ * row from left to right. Each pixel is a 32bit value, with the high byte
+ * being the alpha channel, the next being red, then green, and the low byte
+ * being blue. The width and height are measured in pixels and will be
+ * greater than 0 when returned. The alpha flag is either 0 or 1. 0 denotes
+ * that the alpha channel is not used. 1 denotes that it is significant.
+ * Compress is filled with the compression value/amount the image was
+ * stored with. The quality value is filled with the quality encoding of
+ * the image file (0 - 100). The lossy flags is either 0 or 1 as to if
+ * the image was encoded lossily or not.
+ *
+ * On success the function returns 1, and 0 on failure. On failure the
+ * parameter values may not contain any sensible data.
+ *
+ * @see eet_data_image_decode_to_surface()
+ *
+ * @since 1.0.2
+ * @ingroup Eet_File_Image_Cipher_Group
+ */
+EAPI int
+eet_data_image_decode_to_surface_cipher(const void *data,
+                                        const char *cipher_key,
+                                        int size,
+                                        unsigned int src_x,
+                                        unsigned int src_y,
+                                        unsigned int *d,
+                                        unsigned int w,
+                                        unsigned int h,
+                                        unsigned int row_stride,
+                                        int *alpha,
+                                        int *compress,
+                                        int *quality,
+                                        int *lossy);
+
+/**
+ * Encode image data for storage or transmission using a cipher.
+ * @param data A pointer to the image pixel data.
+ * @param cipher_key The key to use as cipher.
+ * @param size_ret A pointer to an int to hold the size of the returned data.
+ * @param w The width of the image in pixels.
+ * @param h The height of the image in pixels.
+ * @param alpha The alpha channel flag.
+ * @param compress The compression amount.
+ * @param quality The quality encoding amount.
+ * @param lossy The lossiness flag.
+ * @return The encoded image data.
+ *
+ * This function stakes image pixel data and encodes it with compression and
+ * possible loss of quality (as a trade off for size) for storage or
+ * transmission to another system.
+ *
+ * The data expected is the same format as returned by eet_data_image_read.
+ * If this is not the case weird things may happen. Width and height must
+ * be between 1 and 8000 pixels. The alpha flags can be 0 or 1 (0 meaning
+ * the alpha values are not useful and 1 meaning they are). Compress can
+ * be from 0 to 9 (0 meaning no compression, 9 meaning full compression).
+ * This is only used if the image is not lossily encoded. Quality is used on
+ * lossy compression and should be a value from 0 to 100. The lossy flag
+ * can be 0 or 1. 0 means encode losslessly and 1 means to encode with
+ * image quality loss (but then have a much smaller encoding).
+ *
+ * On success this function returns a pointer to the encoded data that you
+ * can free with free() when no longer needed.
+ *
+ * @see eet_data_image_encode()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_File_Image_Cipher_Group
+ */
+EAPI void *
+eet_data_image_encode_cipher(const void *data,
+                             const char *cipher_key,
+                             unsigned int w,
+                             unsigned int h,
+                             int alpha,
+                             int compress,
+                             int quality,
+                             int lossy,
+                             int *size_ret);
+
+/**
+ * @defgroup Eet_Cipher_Group Cipher, Identity and Protection Mechanisms
+ *
+ * Eet allows one to protect entries of an #Eet_File
+ * individually. This may be used to ensure data was not tampered or
+ * that third party does not read your data.
+ *
+ * @see @ref Eet_File_Cipher_Group
+ * @see @ref Eet_File_Image_Cipher_Group
+ *
+ * @{
+ */
+
+/**
+ * @typedef Eet_Key
+ * Opaque handle that defines an identity (also known as key)
+ * in Eet's cipher system.
+ */
+typedef struct _Eet_Key Eet_Key;
+
+/**
+ * @}
+ */
+
+/**
+ * Callback used to request if needed the password of a private key.
+ *
+ * @param buffer the buffer where to store the password.
+ * @param size the maximum password size (size of buffer, including '@\0').
+ * @param rwflag if the buffer is also readable or just writable.
+ * @param data currently unused, may contain some context in future.
+ * @return 1 on success and password was set to @p buffer, 0 on failure.
+ *
+ * @since 1.2.0
+ * @ingroup Eet_Cipher_Group
+ */
+typedef int (*Eet_Key_Password_Callback)(char *buffer, int size, int rwflag, void *data);
+
+/**
+ * Create an Eet_Key needed for signing an eet file.
+ *
+ * The certificate should provide the public that match the private key.
+ * No verification is done to ensure that.
+ *
+ * @param certificate_file The file where to find the certificate.
+ * @param private_key_file The file that contains the private key.
+ * @param cb Function to callback if password is required to unlock
+ *        private key.
+ * @return A key handle to use, or @c NULL on failure.
+ *
+ * @see eet_identity_close()
+ *
+ * @since 1.2.0
+ * @ingroup Eet_Cipher_Group
+ */
+EAPI Eet_Key *
+eet_identity_open(const char *certificate_file,
+                  const char *private_key_file,
+                  Eet_Key_Password_Callback cb);
+
+/**
+ * Close and release all ressource used by an Eet_Key.  An
+ * reference counter prevent it from being freed until all file
+ * using it are also closed.
+ *
+ * @param key the key handle to close and free resources.
+ *
+ * @since 1.2.0
+ * @ingroup Eet_Cipher_Group
+ */
+EAPI void
+eet_identity_close(Eet_Key *key);
+
+/**
+ * Set a key to sign a file
+ *
+ * @param ef the file to set the identity.
+ * @param key the key handle to set as identity.
+ * @return #EET_ERROR_BAD_OBJECT if @p ef is invalid or
+ *         #EET_ERROR_NONE on success.
+ *
+ * @since 1.2.0
+ * @ingroup Eet_Cipher_Group
+ */
+EAPI Eet_Error
+eet_identity_set(Eet_File *ef,
+                 Eet_Key *key);
+
+/**
+ * Display both private and public key of an Eet_Key.
+ *
+ * @param key the handle to print.
+ * @param out where to print.
+ *
+ * @since 1.2.0
+ * @ingroup Eet_Cipher_Group
+ */
+EAPI void
+eet_identity_print(Eet_Key *key,
+                   FILE *out);
+
+/**
+ * Get the x509 der certificate associated with an Eet_File. Will return NULL
+ * if the file is not signed.
+ *
+ * @param ef The file handle to query.
+ * @param der_length The length of returned data, may be @c NULL.
+ * @return the x509 certificate or @c NULL on error.
+ *
+ * @since 1.2.0
+ * @ingroup Eet_Cipher_Group
+ */
+EAPI const void *
+eet_identity_x509(Eet_File *ef,
+                  int *der_length);
+
+/**
+ * Get the raw signature associated with an Eet_File. Will return NULL
+ * if the file is not signed.
+ *
+ * @param ef The file handle to query.
+ * @param signature_length The length of returned data, may be @c NULL.
+ * @return the raw signature or @c NULL on error.
+ *
+ * @ingroup Eet_Cipher_Group
+ */
+EAPI const void *
+eet_identity_signature(Eet_File *ef,
+                       int *signature_length);
+
+/**
+ * Get the SHA1 associated with a file. Could be the one used to
+ * sign the data or if the data where not signed, it will be the
+ * SHA1 of the file.
+ *
+ * @param ef The file handle to query.
+ * @param sha1_length The length of returned data, may be @c NULL.
+ * @return the associated SHA1 or @c NULL on error.
+ *
+ * @since 1.2.0
+ * @ingroup Eet_Cipher_Group
+ */
+EAPI const void *
+eet_identity_sha1(Eet_File *ef,
+                  int *sha1_length);
+
+/**
+ * Display the x509 der certificate to out.
+ *
+ * @param certificate the x509 certificate to print
+ * @param der_length The length the certificate.
+ * @param out where to print.
+ *
+ * @since 1.2.0
+ * @ingroup Eet_Cipher_Group
+ */
+EAPI void
+eet_identity_certificate_print(const unsigned char *certificate,
+                               int der_length,
+                               FILE *out);
+
+/**
+ * @defgroup Eet_Data_Group Eet Data Serialization
+ *
+ * Convenience functions to serialize and parse complex data
+ * structures to binary blobs.
+ *
+ * While Eet core just handles binary blobs, it is often required
+ * to save some structured data of different types, such as
+ * strings, integers, lists, hashes and so on.
+ *
+ * Eet can serialize and then parse data types given some
+ * construction instructions. These are defined in two levels:
+ *
+ * - #Eet_Data_Descriptor_Class to tell generic memory handling,
+ *   such as the size of the type, how to allocate memory, strings,
+ *   lists, hashes and so on.
+ *
+ * - #Eet_Data_Descriptor to tell inside such type, the members and
+ *   their offsets inside the memory blob, their types and
+ *   names. These members can be simple types or other
+ *   #Eet_Data_Descriptor, allowing hierarchical types to be
+ *   defined.
+ *
+ * Given that C provides no introspection, this process can be
+ * quite cumbersome, so we provide lots of macros and convenience
+ * functions to aid creating the types.
+ *
+ * We make now a quick overview of some of the most commonly used elements
+ * of this part of the library. A simple example of a configuration system
+ * will work as a somewhat real life example that is still simple enough to
+ * follow.
+ * Only the relevant sections will be shown here, but you can get the full
+ * code @ref eet-data-simple.c "here".
+ *
+ * Ignoring the included headers, we'll begin by defining our configuration
+ * struct.
+ * @dontinclude eet-data-simple.c
+ * @skip typedef
+ * @until }
+ *
+ * When using Eet, you don't think in matters of what data the program needs
+ * to run and which you would like to store. It's all the same and if it makes
+ * more sense to keep them together, it's perfectly fine to do so. At the time
+ * of telling Eet how your data is comprised you can leave out the things
+ * that are runtime only and let Eet take care of the rest for you.
+ *
+ * The key used to store the config follows, as well as the variable used to
+ * store our data descriptor.
+ * This last one is very important. It's the one thing that Eet will use to
+ * identify your data, both at the time of writing it to the file and when
+ * loading from it.
+ * @skipline MY_CONF
+ * @skipline Eet_Data_Descriptor
+ *
+ * Now we'll see how to create this descriptor, so Eet knows how to handle
+ * our data later on.
+ * Begin our function by declaring an Eet_Data_Descriptor_Class, which is
+ * used to create the actual descriptor. This class contains the name of
+ * our data type, its size and several functions that dictate how Eet should
+ * handle memory to allocate the necessary bits to bring our data to life.
+ * You, as a user, will very hardly set this class' contents directly. The
+ * most common scenario is to use one of the provided macros that set it using
+ * the Eina data types, so that's what we'll be doing across all our examples.
+ * @skip static void
+ * @until eet_data_descriptor_stream_new
+ *
+ * Now that we have our descriptor, we need to make it describe something.
+ * We do so by telling it which members of our struct we want it to know about
+ * and their types.
+ * The eet_data_descriptor_element_add() function takes care of this, but it's
+ * too cumbersome for normal use, so several macros are provided that make
+ * it easier to handle. Even with them, however, code can get very repetitive
+ * and it's not uncommon to define custom macros using them to save on typing.
+ * @skip #define
+ * @until }
+ *
+ * Now our descriptor knows about the parts of our structure that we are
+ * interesting in saving. You can see that not all of them are there, yet Eet
+ * will find those that need saving and do the right thing. When loading our
+ * data, any non-described fields in the structure will be zeroed, so there's
+ * no need to worry about garbage memory in them.
+ * Refer to the documentation of #EET_DATA_DESCRIPTOR_ADD_BASIC to understand
+ * what our macro does.
+ *
+ * We are done with our descriptor init function and it's proper to have the
+ * relevant shutdown. Proper coding guidelines indiciate that all memory
+ * allocated should be freed when the program ends, and since you will most
+ * likely keep your descriptor around for the life or your application, it's
+ * only right to free it at the end.
+ * @skip static void
+ * @until }
+ *
+ * Not listed here, but included in the full example are functions to create
+ * a blank configuration and free it. The first one will only be used when
+ * no file exists to load from, or nothing is found in it, but the latter is
+ * used regardless of where our data comes from. Unless you are reading direct
+ * data from the Eet file, you will be in charge of freeing anything loaded
+ * from it.
+ *
+ * Now it's time to look at how we can load our config from some file.
+ * Begin by opening the Eet file normally.
+ * @skip static My_Conf_Type
+ * @until }
+ *
+ * And now we need to read the data from the file and decode it using our
+ * descriptor. Fortunately, that's all done in one single step.
+ * @until goto
+ *
+ * And that's it for all Eet cares about. But since we are dealing with a
+ * common case, as is save and load of user configurations, the next fragment
+ * of code shows why we have a version field in our struct, and how you can
+ * use it to load older configuration files and update them as needed.
+ * @until }
+ *
+ * Finally, clsoe the file and return the newly loaded config data.
+ * @until }
+ *
+ * Saving data is just as easy. The full version of the following function
+ * includes code to save to a temporary file first, so you can be sure not
+ * to lose all your data in the case of a failure mid-writing. You can look
+ * at it @ref eet-data-simple.c "here".
+ * @skip static Eina_Bool
+ * @until {
+ * @skipline Eina_Bool ret
+ * @skip eet_open
+ * @until eet_close
+ * @skip return
+ * @until }
+ *
+ * To close, our main function, which doesn't do much. Just take some arguments
+ * from the command line with the name of the file to load and another one
+ * where to save again. If input file doesn't exist, a new config structure
+ * will be created and saved to our output file.
+ * @skip int main
+ * @until return ret
+ * @until }
+ *
+ * The following is a list of more advanced and detailed examples.
+ * @li @ref eet_data_nested_example
+ * @li @ref eet_data_file_descriptor
+ * @li @ref Example_Eet_Data_File_Descriptor_02
+ * @li @ref Example_Eet_Data_Cipher_Decipher
+ */
+
+/**
+ * @page eet_data_nested_example Nested structures and Eet Data Descriptors
+ *
+ * We've seen already a simple example of how to use Eet Data Descriptors
+ * to handle our structures, but it didn't show how this works when you
+ * have structures inside other structures.
+ *
+ * Now, there's a very simple case of this, for when you have inline structs
+ * to keep your big structure more organized, you don't need anything else
+ * besides what @ref eet-data-simple.c "this simple example does".
+ * Just use something like @p some_struct.sub_struct.member when adding the
+ * member to the descriptor and it will work.
+ *
+ * For example:
+ * @code
+ * typedef struct
+ * {
+ *    int a_number;
+ *    char *a_string;
+ *    struct {
+ *       int other_num;
+ *       int one_more;
+ *    } sub;
+ * } some_struct;
+ *
+ * void some_function()
+ * {
+ *    ...
+ *    my_desc = eet_data_descriptor_stream_new(&eddc);
+ *    EET_DATA_DESCRIPTOR_ADD_BASIC(my_desc, some_struct, "a_number",
+ *                                  a_number, EET_T_INT);
+ *    EET_DATA_DESCRIPTOR_ADD_BASIC(my_desc, some_struct, "a_string",
+ *                                  a_string, EET_T_STRING);
+ *    EET_DATA_DESCRIPTOR_ADD_BASIC(my_desc, some_struct, "sub.other_num",
+ *                                  sub.other_num, EET_T_INT);
+ *    EET_DATA_DESCRIPTOR_ADD_BASIC(my_desc, some_struct, "sub.one_more",
+ *                                  sub.one_more", EET_T_INT);
+ *    ...
+ * }
+ * @endcode
+ *
+ * But this is not what we are here for today. When we talk about nested
+ * structures, what we really want are things like lists and hashes to be
+ * taken into consideration automatically, and all their contents saved and
+ * loaded just like ordinary integers and strings are.
+ *
+ * And of course, Eet can do that, and considering the work it saves you as a
+ * programmer, we could say it's even easier to do than handling just integers.
+ *
+ * Let's begin with our example then, which is not all too different from the
+ * simple one introduced earlier.
+ *
+ * We won't ignore the headers this time to show how easy it is to use Eina
+ * data types with Eet, but we'll still skip most of the code that is not
+ * pertinent to what we want to show now, but as usual, you can get it full
+ * by follwing @ref eet-data-nested.c "this link".
+ *
+ * @dontinclude eet-data-nested.c
+ * @skipline Eina.h
+ * @skipline Eet.h
+ * @skip typedef struct
+ * @until } My_Conf_Subtype
+ *
+ * Extremely similar to our previous example. Just a new struct in there, and
+ * a pointer to a list in the one we already had. Handling a list of subtypes
+ * is easy on our program, but now we'll see what Eet needs to work with them
+ * (Hint: it's easy too).
+ * @skip _my_conf_descriptor
+ * @until _my_conf_sub_descriptor
+ *
+ * Since we have two structures now, it's only natural that we'll need two
+ * descriptors. One for each, which will be defined exactly as before.
+ * @skip static void
+ * @until eddc
+ * @skip EET_EINA_STREAM_DATA_DESCRIPTOR_CLASS_SET
+ * @until _my_conf_sub_descriptor
+ *
+ * We create our descriptors, each for one type, and as before, we are going to
+ * use a simple macro to set their contents, to save on typing.
+ * @skip #define
+ * @until EET_T_UCHAR
+ *
+ * So far, nothing new. We have our descriptors and we know already how to
+ * save them separately. But what we want is to link them together, and even
+ * more so, we want our main type to hold a list of more than one of the new
+ * sub type. So how do we do that?
+ *
+ * Simple enough, we tell Eet that our main descriptor will hold a list, of
+ * which each node will point to some type described by our new descriptor.
+ * @skip EET_DATA_DESCRIPTOR_ADD_LIST
+ * @until _my_conf_sub_descriptor
+ *
+ * And that's all. We are closing the function now so as to not leave dangling
+ * curly braces, but there's nothing more to show in this example. Only other
+ * additions are the necessary code to free our new data, but you can see it
+ * in the full code listing.
+ * @until }
+ */
+
+/**
+ * @page eet_data_file_descriptor Advanced use of Eet Data Descriptors
+ *
+ * A real life example is usually the best way to see how things are used,
+ * but they also involve a lot more code than what needs to be shown, so
+ * instead of going that way, we'll be borrowing some pieces from one in
+ * the following example. It's been slightly modified from the original
+ * source to show more of the varied ways in which Eet can handle our data.
+ *
+ * @ref eet-data-file_descriptor_01.c "This example" shows a cache of user
+ * accounts and messages received, and it's a bit more interactive than
+ * previous examples.
+ *
+ * Let's begin by looking at the structures we'll be using. First we have
+ * one to define the messages the user receives and one for the one he posts.
+ * Straight forward and nothing new here.
+ * @dontinclude eet-data-file_descriptor_01.c
+ * @skip typedef
+ * @until My_Post
+ *
+ * One more to declare the account itself. This one will contain a list of
+ * all messages received, and the posts we make ourselves will be kept in an
+ * array. No special reason other than to show how to use arrays with Eet.
+ * @until My_Account
+ *
+ * Finally, the main structure to hold our cache of accounts. We'll be looking
+ * for these accounts by their names, so let's keep them in a hash, using
+ * that name as the key.
+ * @until My_Cache
+ *
+ * As explained before, we need one descriptor for each struct we want Eet
+ * to handle, but this time we also want to keep around our Eet file and its
+ * string dictionary. You will see why in a moment.
+ * @skip Eet_Data_Descriptor
+ * @until _my_post_descriptor
+ * @skip Eet_File
+ * @until Eet_Dictionary
+ *
+ * The differences begin now. They aren't much, but we'll be creating our
+ * descriptors differently. Things can be added to our cache, but we won't
+ * be modifying the current contents, so we can consider the data read from
+ * it to be read-only, and thus allow Eet to save time and memory by not
+ * duplicating thins unnecessary.
+ * @skip static void
+ * @until _my_post_descriptor
+ *
+ * As the comment in the code explains, we are asking Eet to give us strings
+ * directly from the mapped file, which avoids having to load it in memory
+ * and data duplication.
+ * Of course, there are things to take into account when doing things this
+ * way, and they will be mentioned as we encounter those special cases.
+ *
+ * Next comes the actual description of our data, just like we did in the
+ * previous examples.
+ * @skip #define
+ * @until #undef
+ * @until #define
+ * @until #undef
+ *
+ * And the account struct's description doesn't add much new, but it's worth
+ * commenting on it.
+ * @skip #define
+ * @until _my_post_descriptor
+ *
+ * How to add a list we've seen before, but now we are also adding an array.
+ * There's nothing really special about it, but it's important to note that
+ * the EET_DATA_DESCRIPTOR_ADD_VAR_ARRAY is used to add arrays of variable
+ * length to a descriptor. That is, arrays just like the one we defined.
+ * Since there's no way in C to know how long they are, we need to keep
+ * track of the count ourselves and Eet needs to know how to do so as well.
+ * That's what the @p posts_count member of our struct is for. When adding
+ * our array member, this macro will look for another variable in the struct
+ * named just like the array, but with @p _count attached to the end.
+ * When saving our data, Eet will know how many elements the array contains
+ * by looking into this count variable. When loading back from a file, this
+ * variable will be set to the right number of elements.
+ *
+ * Another option for arrays is to use EET_DATA_DESCRIPTOR_ADD_ARRAY, which
+ * takes care of fixed sized arrays.
+ * For example, let's suppose that we want to keep track of only the last
+ * ten posts the user sent, and we declare our account struct as follows
+ * @code
+ * typedef struct
+ * {
+ *    unsigned int id;
+ *    const char  *name;
+ *    Eina_List   *messages;
+ *    My_Post      posts[10];
+ * } My_Account;
+ * @endcode
+ * Then we would add the array to our descriptor with
+ * @code
+ * EET_DATA_DESCRIPTOR_ADD_ARRAY(_my_account_descriptor, My_Account, "posts",
+ *                               posts, _my_post_descriptor);
+ * @endcode
+ *
+ * Notice how this time we don't have a @p posts_count variable in our struct.
+ * We could have it for the program to keep track of how many posts the
+ * array actually contains, but Eet no longer needs it. Being defined that
+ * way the array is already taking up all the memory needed for the ten
+ * elements, and it is possible in C to determine how much it is in code.
+ * When saving our data, Eet will just dump the entire memory blob into the
+ * file, regardless of how much of it is really used. So it's important to
+ * take into consideration this kind of things when defining your data types.
+ * Each has its uses, its advantages and disadvantages and it's up to you
+ * to decide which to use.
+ *
+ * Now, going back to our example, we have to finish adding our data to the
+ * descriptors. We are only missing the main one for the cache, which
+ * contains our hash of accounts.
+ * Unless you are using your own hash functions when setting the descriptor
+ * class, always use hashes with string type keys.
+ * @skip #define
+ * @until }
+ *
+ * If you remember, we told Eet not to duplicate memory when possible at the
+ * time of loading back our data. But this doesn't mean everything will be
+ * loaded straight from disk and we don't have to worry about freeing it.
+ * Data in the Eet file is compressed and encoded, so it still needs to be
+ * decoded and memory will be allocated to convert it back into something we
+ * can use. We also need to take care of anything we add in the current
+ * instance of the program.
+ * To summarize, any string we get from Eet is likely to be a pointer to the
+ * internal dictionary, and trying to free it will, in the best case, crash
+ * our application right away.
+ *
+ * So how do we know if we have to free a string? We check if it's part of
+ * the dictionary, and if it's not there we can be sure it's safe to get
+ * rid of it.
+ * @skip static void
+ * @skip }
+ * @skip static void
+ * @until }
+ *
+ * See how this is used when adding a new message to our cache.
+ * @skip static My_Message
+ * @until return msg
+ * @until free(msg)
+ * @until }
+ *
+ * Skipping all the utility functions used by our program (remember you can
+ * look at the full example @ref eet-data-file_descriptor_01.c "here") we get to
+ * our cache loading code. Nothing out of the ordinary at first, just the
+ * same old open file, read data using our main descriptor to decode it
+ * into something we can use and check version of loaded data and if it doesn't
+ * match, do something accordingly.
+ * @skip static My_Cache
+ * @until }
+ * @until }
+ * @until }
+ *
+ * Then comes the interesting part. Remember how we kept two more global
+ * variables with our descriptors? One of them we already used to check if
+ * it was right to free a string or not, but we didn't know where it came from.
+ * Loading our data straight from the mmapped file means that we can't close
+ * it until we are done using it, so we need to keep its handler around until
+ * then. It also means that any changes done to the file can, and will,
+ * invalidate all our pointers to the file backed data, so if we add something
+ * and save the file, we need to reload our cache.
+ *
+ * Thus our load function checks if we had an open file, if there is it gets
+ * closed and our variable is updated to the new handler. Then we get the
+ * string dictionary we use to check if a string is part of it or not.
+ * Updating any references to the cache data is up you as a programmer to
+ * handle properly, there's nothing Eet can do in this situation.
+ * @until }
+ *
+ * The save function doesn't have anything new, and all that's left after it
+ * is the main program, which doesn't really have anything of interest within
+ * the scope of what we are learning.
+ */
+
+/**
+ * @addtogroup Eet_Data_Group
+ * @{
+ */
+#define EET_T_UNKNOW         0 /**< Unknown data encoding type */
+#define EET_T_CHAR           1 /**< Data type: char */
+#define EET_T_SHORT          2 /**< Data type: short */
+#define EET_T_INT            3 /**< Data type: int */
+#define EET_T_LONG_LONG      4 /**< Data type: long long */
+#define EET_T_FLOAT          5 /**< Data type: float */
+#define EET_T_DOUBLE         6 /**< Data type: double */
+#define EET_T_UCHAR          7 /**< Data type: unsigned char */
+#define EET_T_USHORT         8 /**< Data type: unsigned short */
+#define EET_T_UINT           9 /**< Data type: unsigned int */
+#define EET_T_ULONG_LONG     10 /**< Data type: unsigned long long */
+#define EET_T_STRING         11 /**< Data type: char * */
+#define EET_T_INLINED_STRING 12 /**< Data type: char * (but compressed inside the resulting eet) */
+#define EET_T_NULL           13 /**< Data type: (void *) (only use it if you know why) */
+#define EET_T_F32P32         14 /**< Data type: fixed point 32.32 */
+#define EET_T_F16P16         15 /**< Data type: fixed point 16.16 */
+#define EET_T_F8P24          16 /**< Data type: fixed point 8.24 */
+#define EET_T_LAST           18 /**< Last data type */
+
+#define EET_G_UNKNOWN        100 /**< Unknown group data encoding type */
+#define EET_G_ARRAY          101 /**< Fixed size array group type */
+#define EET_G_VAR_ARRAY      102 /**< Variable size array group type */
+#define EET_G_LIST           103 /**< Linked list group type */
+#define EET_G_HASH           104 /**< Hash table group type */
+#define EET_G_UNION          105 /**< Union group type */
+#define EET_G_VARIANT        106 /**< Selectable subtype group */
+#define EET_G_LAST           107 /**< Last group type */
+
+#define EET_I_LIMIT          128 /**< Other type exist but are reserved for internal purpose. */
+
+/**
+ * @typedef Eet_Data_Descriptor
+ *
+ * Opaque handle that have information on a type members.
+ *
+ * Descriptors are created using an #Eet_Data_Descriptor_Class, and they
+ * describe the contents of the structure that will be serialized by Eet.
+ * Not all members need be described by it, just those that should be handled
+ * by Eet. This way it's possible to have one structure with both data to be
+ * saved to a file, like application configuration, and runtime information
+ * that would be meaningless to store, but is appropriate to keep together
+ * during the program execution.
+ * The members are added by means of
+ * EET_DATA_DESCRIPTOR_ADD_BASIC(), EET_DATA_DESCRIPTOR_ADD_SUB(),
+ * EET_DATA_DESCRIPTOR_ADD_LIST(), EET_DATA_DESCRIPTOR_ADD_HASH()
+ * or eet_data_descriptor_element_add().
+ *
+ * @see eet_data_descriptor_stream_new()
+ * @see eet_data_descriptor_file_new()
+ * @see eet_data_descriptor_free()
+ */
+typedef struct _Eet_Data_Descriptor Eet_Data_Descriptor;
+
+/**
+ * @def EET_DATA_DESCRIPTOR_CLASS_VERSION
+ * The version of #Eet_Data_Descriptor_Class at the time of the
+ * distribution of the sources. One should define this to its
+ * version member so it is compatible with abi changes, or at least
+ * will not crash with them.
+ */
+#define EET_DATA_DESCRIPTOR_CLASS_VERSION 4
+
+/**
+ * @typedef Eet_Data_Descriptor_Class
+ *
+ * Instructs Eet about memory management for different needs under
+ * serialization and parse process.
+ */
+typedef struct _Eet_Data_Descriptor_Class Eet_Data_Descriptor_Class;
+
+typedef int                             (*Eet_Descriptor_Hash_Foreach_Callback_Callback)(void *h, const char *k, void *dt, void *fdt);
+
+typedef void *                          (*Eet_Descriptor_Mem_Alloc_Callback)(size_t size);
+typedef void                            (*Eet_Descriptor_Mem_Free_Callback)(void *mem);
+typedef char *                          (*Eet_Descriptor_Str_Alloc_Callback)(const char *str);
+typedef void                            (*Eet_Descriptor_Str_Free_Callback)(const char *str);
+typedef void *                          (*Eet_Descriptor_List_Next_Callback)(void *l);
+typedef void *                          (*Eet_Descriptor_List_Append_Callback)(void *l, void *d);
+typedef void *                          (*Eet_Descriptor_List_Data_Callback)(void *l);
+typedef void *                          (*Eet_Descriptor_List_Free_Callback)(void *l);
+typedef void                            (*Eet_Descriptor_Hash_Foreach_Callback)(void *h, Eet_Descriptor_Hash_Foreach_Callback_Callback func, void *fdt);
+typedef void *                          (*Eet_Descriptor_Hash_Add_Callback)(void *h, const char *k, void *d);
+typedef void                            (*Eet_Descriptor_Hash_Free_Callback)(void *h);
+typedef char *                          (*Eet_Descriptor_Str_Direct_Alloc_Callback)(const char *str);
+typedef void                            (*Eet_Descriptor_Str_Direct_Free_Callback)(const char *str);
+typedef const char *                    (*Eet_Descriptor_Type_Get_Callback)(const void *data, Eina_Bool *unknow);
+typedef Eina_Bool                       (*Eet_Descriptor_Type_Set_Callback)(const char *type, void *data, Eina_Bool unknow);
+typedef void *                          (*Eet_Descriptor_Array_Alloc_Callback)(size_t size);
+typedef void                            (*Eet_Descriptor_Array_Free_Callback)(void *mem);
+/**
+ * @struct _Eet_Data_Descriptor_Class
+ *
+ * Instructs Eet about memory management for different needs under
+ * serialization and parse process.
+ *
+ * The list and hash methods match the Eina API, so for a more detalied
+ * reference on them, look at the Eina_List and Eina_Hash documentation,
+ * respectively.
+ * For the most part these will be used with the standard Eina functions,
+ * so using EET_EINA_STREAM_DATA_DESCRIPTOR_CLASS_SET() and
+ * EET_EINA_FILE_DATA_DESCRIPTOR_CLASS_SET() will set up everything
+ * accordingly.
+ */
+struct _Eet_Data_Descriptor_Class
+{
+   int         version;  /**< ABI version. Should always be set to #EET_DATA_DESCRIPTOR_CLASS_VERSION */
+   const char *name;  /**< Name of the user data type to be serialized */
+   int         size;  /**< Size in bytes of the user data type to be serialized */
+   struct
+   {
+      Eet_Descriptor_Mem_Alloc_Callback        mem_alloc; /**< how to allocate memory (usually malloc()) */
+      Eet_Descriptor_Mem_Free_Callback         mem_free; /**< how to free memory (usually free()) */
+      Eet_Descriptor_Str_Alloc_Callback        str_alloc; /**< how to allocate a string */
+      Eet_Descriptor_Str_Free_Callback         str_free; /**< how to free a string */
+      Eet_Descriptor_List_Next_Callback        list_next; /**< how to iterate to the next element of a list. Receives and should return the list node. */
+      Eet_Descriptor_List_Append_Callback      list_append; /**< how to append data @p d to list which head node is @p l */
+      Eet_Descriptor_List_Data_Callback        list_data; /**< retrieves the data from node @p l */
+      Eet_Descriptor_List_Free_Callback        list_free; /**< free all the nodes from the list which head node is @p l */
+      Eet_Descriptor_Hash_Foreach_Callback     hash_foreach; /**< iterates over all elements in the hash @p h in no specific order */
+      Eet_Descriptor_Hash_Add_Callback         hash_add; /**< add a new data @p d with key @p k in hash @p h */
+      Eet_Descriptor_Hash_Free_Callback        hash_free; /**< free all entries from the hash @p h */
+      Eet_Descriptor_Str_Direct_Alloc_Callback str_direct_alloc; /**< how to allocate a string directly from file backed/mmaped region pointed by @p str */
+      Eet_Descriptor_Str_Direct_Free_Callback  str_direct_free; /**< how to free a string returned by str_direct_alloc */
+      Eet_Descriptor_Type_Get_Callback         type_get; /**< get the type, as used in the union or variant mapping, that should be used to store the given data into the eet file. */
+      Eet_Descriptor_Type_Set_Callback         type_set; /**< called when loading a mapped type with the given @p type used to describe the type in the descriptor */
+      Eet_Descriptor_Array_Alloc_Callback      array_alloc; /**< how to allocate memory for array (usually malloc()) */
+      Eet_Descriptor_Array_Free_Callback       array_free; /**< how to free memory for array (usually free()) */
+   } func;
+};
+
+/**
+ * @}
+ */
+
+/**
+ * Create a new empty data structure descriptor.
+ * @param name The string name of this data structure (most be a
+ *        global constant and never change).
+ * @param size The size of the struct (in bytes).
+ * @param func_list_next The function to get the next list node.
+ * @param func_list_append The function to append a member to a list.
+ * @param func_list_data The function to get the data from a list node.
+ * @param func_list_free The function to free an entire linked list.
+ * @param func_hash_foreach The function to iterate through all
+ *        hash table entries.
+ * @param func_hash_add The function to add a member to a hash table.
+ * @param func_hash_free The function to free an entire hash table.
+ * @return A new empty data descriptor.
+ *
+ * This function creates a new data descriptore and returns a handle to the
+ * new data descriptor. On creation it will be empty, containing no contents
+ * describing anything other than the shell of the data structure.
+ *
+ * You add structure members to the data descriptor using the macros
+ * EET_DATA_DESCRIPTOR_ADD_BASIC(), EET_DATA_DESCRIPTOR_ADD_SUB() and
+ * EET_DATA_DESCRIPTOR_ADD_LIST(), depending on what type of member you are
+ * adding to the description.
+ *
+ * Once you have described all the members of a struct you want loaded, or
+ * saved eet can load and save those members for you, encode them into
+ * endian-independent serialised data chunks for transmission across a
+ * a network or more.
+ *
+ * The function pointers to the list and hash table functions are only
+ * needed if you use those data types, else you can pass NULL instead.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ *
+ * @deprecated use eet_data_descriptor_stream_new() or
+ *             eet_data_descriptor_file_new()
+ */
+EINA_DEPRECATED EAPI Eet_Data_Descriptor *
+eet_data_descriptor_new(const char *name,
+                        int size,
+                        Eet_Descriptor_List_Next_Callback func_list_next,
+                        Eet_Descriptor_List_Append_Callback func_list_append,
+                        Eet_Descriptor_List_Data_Callback func_list_data,
+                        Eet_Descriptor_List_Free_Callback func_list_free,
+                        Eet_Descriptor_Hash_Foreach_Callback func_hash_foreach,
+                        Eet_Descriptor_Hash_Add_Callback func_hash_add,
+                        Eet_Descriptor_Hash_Free_Callback func_hash_free);
+/*
+ * FIXME:
+ *
+ * moving to this api from the old above. this will break things when the
+ * move happens - but be warned
+ */
+EINA_DEPRECATED EAPI Eet_Data_Descriptor *
+ eet_data_descriptor2_new(const Eet_Data_Descriptor_Class *eddc);
+EINA_DEPRECATED EAPI Eet_Data_Descriptor *
+ eet_data_descriptor3_new(const Eet_Data_Descriptor_Class *eddc);
+
+/**
+ * This function creates a new data descriptor and returns a handle to the
+ * new data descriptor. On creation it will be empty, containing no contents
+ * describing anything other than the shell of the data structure.
+ * @param eddc The class from where to create the data descriptor.
+ *
+ * You add structure members to the data descriptor using the macros
+ * EET_DATA_DESCRIPTOR_ADD_BASIC(), EET_DATA_DESCRIPTOR_ADD_SUB() and
+ * EET_DATA_DESCRIPTOR_ADD_LIST(), depending on what type of member you are
+ * adding to the description.
+ *
+ * Once you have described all the members of a struct you want loaded or
+ * savedi, eet can load and save those members for you, encode them into
+ * endian-independent serialised data chunks for transmission across a
+ * a network or more.
+ *
+ * This function specially ignores str_direct_alloc and str_direct_free. It
+ * is useful when the eet_data you are reading doesn't have a dictionary,
+ * like network stream or IPC. It also mean that all string will be allocated
+ * and duplicated in memory.
+ *
+ * @since 1.2.3
+ * @ingroup Eet_Data_Group
+ */
+EAPI Eet_Data_Descriptor *
+eet_data_descriptor_stream_new(const Eet_Data_Descriptor_Class *eddc);
+
+/**
+ * This function creates a new data descriptor and returns a handle to the
+ * new data descriptor. On creation it will be empty, containing no contents
+ * describing anything other than the shell of the data structure.
+ * @param eddc The class from where to create the data descriptor.
+ *
+ * You add structure members to the data descriptor using the macros
+ * EET_DATA_DESCRIPTOR_ADD_BASIC(), EET_DATA_DESCRIPTOR_ADD_SUB() and
+ * EET_DATA_DESCRIPTOR_ADD_LIST(), depending on what type of member you are
+ * adding to the description.
+ *
+ * Once you have described all the members of a struct you want loaded or
+ * savedi, eet can load and save those members for you, encode them into
+ * endian-independent serialised data chunks for transmission across a
+ * a network or more.
+ *
+ * This function uses str_direct_alloc and str_direct_free. It is
+ * useful when the eet_data you are reading come from a file and
+ * have a dictionary. This will reduce memory use and improve the
+ * possibility for the OS to page this string out.
+ * However, the load speed and memory saving comes with some drawbacks to keep
+ * in mind. If you never modify the contents of the structures loaded from
+ * the file, all you need to remember is that closing the eet file will make
+ * the strings go away. On the other hand, should you need to free a string,
+ * before doing so you have to verify that it's not part of the eet dictionary.
+ * You can do this in the following way, assuming @p ef is a valid Eet_File
+ * and @p str is a string loaded from said file.
+ *
+ * @code
+ * void eet_string_free(Eet_File *ef, const char *str)
+ * {
+ *    Eet_Dictionary *dict = eet_dictionary_get(ef);
+ *    if (dict && eet_dictionary_string_check(dict, str))
+ *      {
+ *         // The file contains a dictionary and the given string is a part of
+ *         // of it, so we can't free it, just return.
+ *         return;
+ *      }
+ *    // We assume eina_stringshare was used on the descriptor
+ *    eina_stringshare_del(str);
+ * }
+ * @endcode
+ *
+ * @since 1.2.3
+ * @ingroup Eet_Data_Group
+ */
+EAPI Eet_Data_Descriptor *
+eet_data_descriptor_file_new(const Eet_Data_Descriptor_Class *eddc);
+
+/**
+ * This function is an helper that set all the parameters of an
+ * Eet_Data_Descriptor_Class correctly when you use Eina data type
+ * with a stream.
+ * @param eddc The Eet_Data_Descriptor_Class you want to set.
+ * @param eddc_size The size of the Eet_Data_Descriptor_Class at the compilation time.
+ * @param name The name of the structure described by this class.
+ * @param size The size of the structure described by this class.
+ * @return EINA_TRUE if the structure was correctly set (The only
+ *         reason that could make it fail is if you did give wrong
+ *         parameter).
+ *
+ * @note Unless there's a very specific reason to use this function directly,
+ * the EET_EINA_STREAM_DATA_DESCRIPTOR_CLASS_SET macro is recommended.
+ *
+ * @since 1.2.3
+ * @ingroup Eet_Data_Group
+ */
+EAPI Eina_Bool
+eet_eina_stream_data_descriptor_class_set(Eet_Data_Descriptor_Class *eddc,
+                                          unsigned int eddc_size,
+                                          const char *name,
+                                          int size);
+
+/**
+ * This macro is an helper that set all the parameter of an
+ * Eet_Data_Descriptor_Class correctly when you use Eina data type
+ * with stream.
+ * @param clas The Eet_Data_Descriptor_Class you want to set.
+ * @param type The type of the structure described by this class.
+ * @return EINA_TRUE if the structure was correctly set (The only
+ *         reason that could make it fail is if you did give wrong
+ *         parameter).
+ *
+ * @see eet_data_descriptor_stream_new
+ * @since 1.2.3
+ * @ingroup Eet_Data_Group
+ */
+#define EET_EINA_STREAM_DATA_DESCRIPTOR_CLASS_SET(clas, type) \
+  (eet_eina_stream_data_descriptor_class_set(clas, sizeof (*(clas)), # type, sizeof(type)))
+
+/**
+ * This function is an helper that set all the parameter of an
+ * Eet_Data_Descriptor_Class correctly when you use Eina data type
+ * with a file.
+ * @param eddc The Eet_Data_Descriptor_Class you want to set.
+ * @param eddc_size The size of the Eet_Data_Descriptor_Class at the compilation time.
+ * @param name The name of the structure described by this class.
+ * @param size The size of the structure described by this class.
+ * @return EINA_TRUE if the structure was correctly set (The only
+ *         reason that could make it fail is if you did give wrong
+ *         parameter).
+ *
+ * @note Unless there's a very specific reason to use this function directly,
+ * the EET_EINA_FILE_DATA_DESCRIPTOR_CLASS_SET macro is recommended.
+ *
+ * @since 1.2.3
+ * @ingroup Eet_Data_Group
+ */
+EAPI Eina_Bool
+eet_eina_file_data_descriptor_class_set(Eet_Data_Descriptor_Class *eddc,
+                                        unsigned int eddc_size,
+                                        const char *name,
+                                        int size);
+
+/**
+ * This macro is an helper that set all the parameter of an
+ * Eet_Data_Descriptor_Class correctly when you use Eina data type
+ * with file.
+ * @param clas The Eet_Data_Descriptor_Class you want to set.
+ * @param type The type of the structure described by this class.
+ * @return EINA_TRUE if the structure was correctly set (The only
+ *         reason that could make it fail is if you did give wrong
+ *         parameter).
+ *
+ * @see eet_data_descriptor_file_new
+ * @since 1.2.3
+ * @ingroup Eet_Data_Group
+ */
+#define EET_EINA_FILE_DATA_DESCRIPTOR_CLASS_SET(clas, type) \
+  (eet_eina_file_data_descriptor_class_set(clas, sizeof (*(clas)), # type, sizeof(type)))
+
+/**
+ * This function frees a data descriptor when it is not needed anymore.
+ * @param edd The data descriptor to free.
+ *
+ * This function takes a data descriptor handle as a parameter and frees all
+ * data allocated for the data descriptor and the handle itself. After this
+ * call the descriptor is no longer valid.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+EAPI void
+eet_data_descriptor_free(Eet_Data_Descriptor *edd);
+
+/**
+ * This function is an internal used by macros.
+ *
+ * This function is used by macros EET_DATA_DESCRIPTOR_ADD_BASIC(),
+ * EET_DATA_DESCRIPTOR_ADD_SUB() and EET_DATA_DESCRIPTOR_ADD_LIST(). It is
+ * complex to use by hand and should be left to be used by the macros, and
+ * thus is not documented.
+ *
+ * @param edd The data descriptor handle to add element (member).
+ * @param name The name of element to be serialized.
+ * @param type The type of element to be serialized, like
+ *        #EET_T_INT. If #EET_T_UNKNOW, then it is considered to be a
+ *        group, list or hash.
+ * @param group_type If element type is #EET_T_UNKNOW, then the @p
+ *        group_type will speficy if it is a list (#EET_G_LIST),
+ *        array (#EET_G_ARRAY) and so on. If #EET_G_UNKNOWN, then
+ *        the member is a subtype (pointer to another type defined by
+ *        another #Eet_Data_Descriptor).
+ * @param offset byte offset inside the source memory to be serialized.
+ * @param count number of elements (if #EET_G_ARRAY or #EET_G_VAR_ARRAY).
+ * @param counter_name variable that defines the name of number of elements.
+ * @param subtype If contains a subtype, then its data descriptor.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+EAPI void
+eet_data_descriptor_element_add(Eet_Data_Descriptor *edd,
+                                const char *name,
+                                int type,
+                                int group_type,
+                                int offset,
+     /* int                  count_offset, */
+                                int count,
+                                const char *counter_name,
+                                Eet_Data_Descriptor *subtype);
+
+/**
+ * Read a data structure from an eet file and decodes it.
+ * @param ef The eet file handle to read from.
+ * @param edd The data descriptor handle to use when decoding.
+ * @param name The key the data is stored under in the eet file.
+ * @return A pointer to the decoded data structure.
+ *
+ * This function decodes a data structure stored in an eet file, returning
+ * a pointer to it if it decoded successfully, or NULL on failure. This
+ * can save a programmer dozens of hours of work in writing configuration
+ * file parsing and writing code, as eet does all that work for the program
+ * and presents a program-friendly data structure, just as the programmer
+ * likes. Eet can handle members being added or deleted from the data in
+ * storage and safely zero-fills unfilled members if they were not found
+ * in the data. It checks sizes and headers whenever it reads data, allowing
+ * the programmer to not worry about corrupt data.
+ *
+ * Once a data structure has been described by the programmer with the
+ * fields they wish to save or load, storing or retrieving a data structure
+ * from an eet file, or from a chunk of memory is as simple as a single
+ * function call.
+ *
+ * @see eet_data_read_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+EAPI void *
+eet_data_read(Eet_File *ef,
+              Eet_Data_Descriptor *edd,
+              const char *name);
+
+/**
+ * Write a data structure from memory and store in an eet file.
+ * @param ef The eet file handle to write to.
+ * @param edd The data descriptor to use when encoding.
+ * @param name The key to store the data under in the eet file.
+ * @param data A pointer to the data structure to ssave and encode.
+ * @param compress Compression flags for storage.
+ * @return bytes written on successful write, 0 on failure.
+ *
+ * This function is the reverse of eet_data_read(), saving a data structure
+ * to an eet file. The file must have been opening in write mode and the data
+ * will be kept in memory until the file is either closed or eet_sync() is
+ * called to flush any unwritten changes.
+ *
+ * @see eet_data_write_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+EAPI int
+eet_data_write(Eet_File *ef,
+               Eet_Data_Descriptor *edd,
+               const char *name,
+               const void *data,
+               int compress);
+
+typedef void (*Eet_Dump_Callback)(void *data, const char *str);
+
+/**
+ * Dump an eet encoded data structure into ascii text
+ * @param data_in The pointer to the data to decode into a struct.
+ * @param size_in The size of the data pointed to in bytes.
+ * @param dumpfunc The function to call passed a string when new
+ *        data is converted to text
+ * @param dumpdata The data to pass to the @p dumpfunc callback.
+ * @return 1 on success, 0 on failure
+ *
+ * This function will take a chunk of data encoded by
+ * eet_data_descriptor_encode() and convert it into human readable
+ * ascii text.  It does this by calling the @p dumpfunc callback
+ * for all new text that is generated. This callback should append
+ * to any existing text buffer and will be passed the pointer @p
+ * dumpdata as a parameter as well as a string with new text to be
+ * appended.
+ *
+ * Example:
+ *
+ * @code
+ * void output(void *data, const char *string)
+ * {
+ *   printf("%s", string);
+ * }
+ *
+ * void dump(const char *file)
+ * {
+ *   FILE *f;
+ *   int len;
+ *   void *data;
+ *
+ *   f = fopen(file, "r");
+ *   fseek(f, 0, SEEK_END);
+ *   len = ftell(f);
+ *   rewind(f);
+ *   data = malloc(len);
+ *   fread(data, len, 1, f);
+ *   fclose(f);
+ *   eet_data_text_dump(data, len, output, NULL);
+ * }
+ * @endcode
+ *
+ * @see eet_data_text_dump_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+EAPI int
+eet_data_text_dump(const void *data_in,
+                   int size_in,
+                   Eet_Dump_Callback dumpfunc,
+                   void *dumpdata);
+
+/**
+ * Take an ascii encoding from eet_data_text_dump() and re-encode in binary.
+ * @param text The pointer to the string data to parse and encode.
+ * @param textlen The size of the string in bytes (not including 0
+ *        byte terminator).
+ * @param size_ret This gets filled in with the encoded data blob
+ *        size in bytes.
+ * @return The encoded data on success, NULL on failure.
+ *
+ * This function will parse the string pointed to by @p text and return
+ * an encoded data lump the same way eet_data_descriptor_encode() takes an
+ * in-memory data struct and encodes into a binary blob. @p text is a normal
+ * C string.
+ *
+ * @see eet_data_text_undump_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+EAPI void *
+eet_data_text_undump(const char *text,
+                     int textlen,
+                     int *size_ret);
+
+/**
+ * Dump an eet encoded data structure from an eet file into ascii text
+ * @param ef A valid eet file handle.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param dumpfunc The function to call passed a string when new
+ *        data is converted to text
+ * @param dumpdata The data to pass to the @p dumpfunc callback.
+ * @return 1 on success, 0 on failure
+ *
+ * This function will take an open and valid eet file from
+ * eet_open() request the data encoded by
+ * eet_data_descriptor_encode() corresponding to the key @p name
+ * and convert it into human readable ascii text. It does this by
+ * calling the @p dumpfunc callback for all new text that is
+ * generated. This callback should append to any existing text
+ * buffer and will be passed the pointer @p dumpdata as a parameter
+ * as well as a string with new text to be appended.
+ *
+ * @see eet_data_dump_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+EAPI int
+eet_data_dump(Eet_File *ef,
+              const char *name,
+              Eet_Dump_Callback dumpfunc,
+              void *dumpdata);
+
+/**
+ * Take an ascii encoding from eet_data_dump() and re-encode in binary.
+ * @param ef A valid eet file handle.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param text The pointer to the string data to parse and encode.
+ * @param textlen The size of the string in bytes (not including 0
+ *        byte terminator).
+ * @param compress Compression flags (1 == compress, 0 = don't compress).
+ * @return 1 on success, 0 on failure
+ *
+ * This function will parse the string pointed to by @p text,
+ * encode it the same way eet_data_descriptor_encode() takes an
+ * in-memory data struct and encodes into a binary blob.
+ *
+ * The data (optionally compressed) will be in ram, pending a flush to
+ * disk (it will stay in ram till the eet file handle is closed though).
+ *
+ * @see eet_data_undump_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+EAPI int
+eet_data_undump(Eet_File *ef,
+                const char *name,
+                const char *text,
+                int textlen,
+                int compress);
+
+/**
+ * Decode a data structure from an arbitrary location in memory.
+ * @param edd The data  descriptor to use when decoding.
+ * @param data_in The pointer to the data to decode into a struct.
+ * @param size_in The size of the data pointed to in bytes.
+ * @return NULL on failure, or a valid decoded struct pointer on success.
+ *
+ * This function will decode a data structure that has been encoded using
+ * eet_data_descriptor_encode(), and return a data structure with all its
+ * elements filled out, if successful, or NULL on failure.
+ *
+ * The data to be decoded is stored at the memory pointed to by @p data_in,
+ * and is described by the descriptor pointed to by @p edd. The data size is
+ * passed in as the value to @p size_in, ande must be greater than 0 to
+ * succeed.
+ *
+ * This function is useful for decoding data structures delivered to the
+ * application by means other than an eet file, such as an IPC or socket
+ * connection, raw files, shared memory etc.
+ *
+ * Please see eet_data_read() for more information.
+ *
+ * @see eet_data_descriptor_decode_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+EAPI void *
+eet_data_descriptor_decode(Eet_Data_Descriptor *edd,
+                           const void *data_in,
+                           int size_in);
+
+/**
+ * Encode a dsata struct to memory and return that encoded data.
+ * @param edd The data  descriptor to use when encoding.
+ * @param data_in The pointer to the struct to encode into data.
+ * @param size_ret pointer to the an int to be filled with the decoded size.
+ * @return NULL on failure, or a valid encoded data chunk on success.
+ *
+ * This function takes a data structutre in memory and encodes it into a
+ * serialised chunk of data that can be decoded again by
+ * eet_data_descriptor_decode(). This is useful for being able to transmit
+ * data structures across sockets, pipes, IPC or shared file mechanisms,
+ * without having to worry about memory space, machine type, endianess etc.
+ *
+ * The parameter @p edd must point to a valid data descriptor, and
+ * @p data_in must point to the right data structure to encode. If not, the
+ * encoding may fail.
+ *
+ * On success a non NULL valid pointer is returned and what @p size_ret
+ * points to is set to the size of this decoded data, in bytes. When the
+ * encoded data is no longer needed, call free() on it. On failure NULL is
+ * returned and what @p size_ret points to is set to 0.
+ *
+ * Please see eet_data_write() for more information.
+ *
+ * @see eet_data_descriptor_encode_cipher()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+EAPI void *
+eet_data_descriptor_encode(Eet_Data_Descriptor *edd,
+                           const void *data_in,
+                           int *size_ret);
+
+/**
+ * Add a basic data element to a data descriptor.
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ * @param type The type of the member to encode.
+ *
+ * This macro is a convenience macro provided to add a member to
+ * the data descriptor @p edd. The type of the structure is
+ * provided as the @p struct_type parameter (for example: struct
+ * my_struct). The @p name parameter defines a string that will be
+ * used to uniquely name that member of the struct (it is suggested
+ * to use the struct member itself).  The @p member parameter is
+ * the actual struct member itself (for example: values), and @p type is the
+ * basic data type of the member which must be one of: EET_T_CHAR, EET_T_SHORT,
+ * EET_T_INT, EET_T_LONG_LONG, EET_T_FLOAT, EET_T_DOUBLE, EET_T_UCHAR,
+ * EET_T_USHORT, EET_T_UINT, EET_T_ULONG_LONG or EET_T_STRING.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+#define EET_DATA_DESCRIPTOR_ADD_BASIC(edd, struct_type, name, member, type) \
+  do {                                                                      \
+       struct_type ___ett;                                                  \
+       eet_data_descriptor_element_add(edd, name, type, EET_G_UNKNOWN,      \
+                                       (char *)(& (___ett.member)) -        \
+                                       (char *)(& (___ett)),                \
+                                       0, /* 0,  */ NULL, NULL);            \
+    } while(0)
+
+/**
+ * Add a sub-element type to a data descriptor
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ * @param subtype The type of sub-type struct to add.
+ *
+ * This macro lets you easily add a sub-type (a struct that's pointed to
+ * by this one). All the parameters are the same as for
+ * EET_DATA_DESCRIPTOR_ADD_BASIC(), with the @p subtype being the exception.
+ * This must be the data descriptor of the struct that is pointed to by
+ * this element.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+#define EET_DATA_DESCRIPTOR_ADD_SUB(edd, struct_type, name, member, subtype)   \
+  do {                                                                         \
+       struct_type ___ett;                                                     \
+       eet_data_descriptor_element_add(edd, name, EET_T_UNKNOW, EET_G_UNKNOWN, \
+                                       (char *)(& (___ett.member)) -           \
+                                       (char *)(& (___ett)),                   \
+                                       0, /* 0,  */ NULL, subtype);            \
+    } while (0)
+
+/**
+ * Add a linked list type to a data descriptor
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ * @param subtype The type of linked list member to add.
+ *
+ * This macro lets you easily add a linked list of other data types. All the
+ * parameters are the same as for EET_DATA_DESCRIPTOR_ADD_BASIC(), with the
+ * @p subtype being the exception. This must be the data descriptor of the
+ * element that is in each member of the linked list to be stored.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+#define EET_DATA_DESCRIPTOR_ADD_LIST(edd, struct_type, name, member, subtype) \
+  do {                                                                        \
+       struct_type ___ett;                                                    \
+       eet_data_descriptor_element_add(edd, name, EET_T_UNKNOW, EET_G_LIST,   \
+                                       (char *)(& (___ett.member)) -          \
+                                       (char *)(& (___ett)),                  \
+                                       0, /* 0,  */ NULL, subtype);           \
+    } while (0)
+
+/**
+ * Add a linked list of string to a data descriptor
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ *
+ * This macro lets you easily add a linked list of char *. All the
+ * parameters are the same as for EET_DATA_DESCRIPTOR_ADD_BASIC().
+ *
+ * @since 1.5.0
+ * @ingroup Eet_Data_Group
+ */
+#define EET_DATA_DESCRIPTOR_ADD_LIST_STRING(edd, struct_type, name, member) \
+  do {                                                                      \
+       struct_type ___ett;                                                  \
+       eet_data_descriptor_element_add(edd, name, EET_T_STRING, EET_G_LIST, \
+                                       (char *)(& (___ett.member)) -        \
+                                       (char *)(& (___ett)),                \
+                                       0, /* 0,  */ NULL, NULL);            \
+    } while (0)
+
+/**
+ * Add a hash type to a data descriptor
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ * @param subtype The type of hash member to add.
+ *
+ * This macro lets you easily add a hash of other data types. All the
+ * parameters are the same as for EET_DATA_DESCRIPTOR_ADD_BASIC(), with the
+ * @p subtype being the exception. This must be the data descriptor of the
+ * element that is in each member of the hash to be stored.
+ * The hash keys must be strings.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Group
+ */
+#define EET_DATA_DESCRIPTOR_ADD_HASH(edd, struct_type, name, member, subtype) \
+  do {                                                                        \
+       struct_type ___ett;                                                    \
+       eet_data_descriptor_element_add(edd, name, EET_T_UNKNOW, EET_G_HASH,   \
+                                       (char *)(& (___ett.member)) -          \
+                                       (char *)(& (___ett)),                  \
+                                       0, /* 0,  */ NULL, subtype);           \
+    } while (0)
+
+/**
+ * Add a hash of string to a data descriptor
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ *
+ * This macro lets you easily add a hash of string elements. All the
+ * parameters are the same as for EET_DATA_DESCRIPTOR_ADD_HASH().
+ *
+ * @since 1.3.4
+ * @ingroup Eet_Data_Group
+ */
+#define EET_DATA_DESCRIPTOR_ADD_HASH_STRING(edd, struct_type, name, member) \
+  do {                                                                      \
+       struct_type ___ett;                                                  \
+       eet_data_descriptor_element_add(edd, name, EET_T_STRING, EET_G_HASH, \
+                                       (char *)(& (___ett.member)) -        \
+                                       (char *)(& (___ett)),                \
+                                       0, /* 0,  */ NULL, NULL);            \
+    } while (0)
+
+/**
+ * Add an array of basic data elements to a data descriptor.
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ * @param type The type of the member to encode.
+ *
+ * This macro lets you easily add a fixed size array of basic data
+ * types. All the parameters are the same as for
+ * EET_DATA_DESCRIPTOR_ADD_BASIC().
+ * The array must be defined with a fixed size in the declaration of the
+ * struct containing it.
+ *
+ * @since 1.5.0
+ * @ingroup Eet_Data_Group
+ */
+#define EET_DATA_DESCRIPTOR_ADD_BASIC_ARRAY(edd, struct_type, name, member, type) \
+  do {                                                                            \
+       struct_type ___ett;                                                        \
+       eet_data_descriptor_element_add(edd, name, type, EET_G_ARRAY,              \
+                                       (char *)(& (___ett.member)) -              \
+                                       (char *)(& (___ett)),                      \
+                                       sizeof(___ett.member) /                    \
+                                       sizeof(___ett.member[0]),                  \
+                                       NULL, NULL);                               \
+    } while(0)
+
+/**
+ * Add a fixed size array type to a data descriptor
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ * @param subtype The type of hash member to add.
+ *
+ * This macro lets you easily add a fixed size array of other data
+ * types. All the parameters are the same as for
+ * EET_DATA_DESCRIPTOR_ADD_BASIC(), with the @p subtype being the
+ * exception. This must be the data descriptor of the element that
+ * is in each member of the array to be stored.
+ * The array must be defined with a fixed size in the declaration of the
+ * struct containing it.
+ *
+ * @since 1.0.2
+ * @ingroup Eet_Data_Group
+ */
+#define EET_DATA_DESCRIPTOR_ADD_ARRAY(edd, struct_type, name, member, subtype)   \
+  do {                                                                           \
+       struct_type ___ett;                                                       \
+       eet_data_descriptor_element_add(edd, name, EET_T_UNKNOW, EET_G_ARRAY,     \
+                                       (char *)(& (___ett.member)) -             \
+                                       (char *)(& (___ett)),                     \
+                                       /* 0,  */ sizeof(___ett.member) /         \
+                                       sizeof(___ett.member[0]), NULL, subtype); \
+    } while (0)
+
+/**
+ * Add a variable size array type to a data descriptor
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ * @param subtype The type of hash member to add.
+ *
+ * This macro lets you easily add a variable size array of other data
+ * types. All the parameters are the same as for
+ * EET_DATA_DESCRIPTOR_ADD_BASIC(), with the @p subtype being the
+ * exception. This must be the data descriptor of the element that
+ * is in each member of the array to be stored. This assumes you have
+ * a struct member (of type EET_T_INT) called member_count (note the
+ * _count appended to the member) that holds the number of items in
+ * the array. This array will be allocated separately to the struct it
+ * is in.
+ *
+ * @since 1.0.2
+ * @ingroup Eet_Data_Group
+ */
+#define EET_DATA_DESCRIPTOR_ADD_VAR_ARRAY(edd, struct_type, name, member, subtype) \
+  do {                                                                             \
+       struct_type ___ett;                                                         \
+       eet_data_descriptor_element_add(edd,                                        \
+                                       name,                                       \
+                                       EET_T_UNKNOW,                               \
+                                       EET_G_VAR_ARRAY,                            \
+                                       (char *)(& (___ett.member)) -               \
+                                       (char *)(& (___ett)),                       \
+                                       (char *)(& (___ett.member ## _count)) -     \
+                                       (char *)(& (___ett)),                       \
+                                       /* 0,  */ NULL,                             \
+                                       subtype);                                   \
+    } while (0)
+
+/**
+ * Add a variable size array type to a data descriptor
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ *
+ * This macro lets you easily add a variable size array of strings. All
+ * the parameters are the same as for EET_DATA_DESCRIPTOR_ADD_BASIC().
+ *
+ * @since 1.4.0
+ * @ingroup Eet_Data_Group
+ */
+#define EET_DATA_DESCRIPTOR_ADD_VAR_ARRAY_STRING(edd, struct_type, name, member) \
+  do {                                                                           \
+       struct_type ___ett;                                                       \
+       eet_data_descriptor_element_add(edd,                                      \
+                                       name,                                     \
+                                       EET_T_STRING,                             \
+                                       EET_G_VAR_ARRAY,                          \
+                                       (char *)(& (___ett.member)) -             \
+                                       (char *)(& (___ett)),                     \
+                                       (char *)(& (___ett.member ## _count)) -   \
+                                       (char *)(& (___ett)),                     \
+                                       /* 0,  */ NULL,                           \
+                                       NULL);                                    \
+    } while (0)
+
+/**
+ * Add an union type to a data descriptor
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ * @param type_member The member that give hints on what is in the union.
+ * @param unified_type Describe all possible type the union could handle.
+ *
+ * This macro lets you easily add an union with a member that specify what is inside.
+ * The @p unified_type is an Eet_Data_Descriptor, but only the entry that match the name
+ * returned by type_get will be used for each serialized data. The type_get and type_set
+ * callback of unified_type should be defined.
+ *
+ * @since 1.2.4
+ * @ingroup Eet_Data_Group
+ * @see Eet_Data_Descriptor_Class
+ */
+#define EET_DATA_DESCRIPTOR_ADD_UNION(edd, struct_type, name, member, type_member, unified_type) \
+  do {                                                                                           \
+       struct_type ___ett;                                                                       \
+       eet_data_descriptor_element_add(edd, name, EET_T_UNKNOW, EET_G_UNION,                     \
+                                       (char *)(& (___ett.member)) -                             \
+                                       (char *)(& (___ett)),                                     \
+                                       (char *)(& (___ett.type_member)) -                        \
+                                       (char *)(& (___ett)),                                     \
+                                       NULL, unified_type);                                      \
+    } while (0)
+
+/**
+ * Add a automatically selectable type to a data descriptor
+ * @param edd The data descriptor to add the type to.
+ * @param struct_type The type of the struct.
+ * @param name The string name to use to encode/decode this member
+ *        (must be a constant global and never change).
+ * @param member The struct member itself to be encoded.
+ * @param type_member The member that give hints on what is in the union.
+ * @param unified_type Describe all possible type the union could handle.
+ *
+ * This macro lets you easily define what the content of @p member points to depending of
+ * the content of @p type_member. The type_get and type_set callback of unified_type should
+ * be defined. If the the type is not know at the time of restoring it, eet will still call
+ * type_set of @p unified_type but the pointer will be set to a serialized binary representation
+ * of what eet know. This make it possible, to save this pointer again by just returning the string
+ * given previously and telling it by setting unknow to EINA_TRUE.
+ *
+ * @since 1.2.4
+ * @ingroup Eet_Data_Group
+ * @see Eet_Data_Descriptor_Class
+ */
+#define EET_DATA_DESCRIPTOR_ADD_VARIANT(edd, struct_type, name, member, type_member, unified_type) \
+  do {                                                                                             \
+       struct_type ___ett;                                                                         \
+       eet_data_descriptor_element_add(edd, name, EET_T_UNKNOW, EET_G_VARIANT,                     \
+                                       (char *)(& (___ett.member)) -                               \
+                                       (char *)(& (___ett)),                                       \
+                                       (char *)(& (___ett.type_member)) -                          \
+                                       (char *)(& (___ett)),                                       \
+                                       NULL, unified_type);                                        \
+    } while (0)
+
+/**
+ * Add a mapping to a data descriptor that will be used by union, variant or inherited type
+ * @param unified_type The data descriptor to add the mapping to.
+ * @param name The string name to get/set type.
+ * @param subtype The matching data descriptor.
+ *
+ * @since 1.2.4
+ * @ingroup Eet_Data_Group
+ * @see Eet_Data_Descriptor_Class
+ */
+#define EET_DATA_DESCRIPTOR_ADD_MAPPING(unified_type, name, subtype) \
+  eet_data_descriptor_element_add(unified_type,                      \
+                                  name,                              \
+                                  EET_T_UNKNOW,                      \
+                                  EET_G_UNKNOWN,                     \
+                                  0,                                 \
+                                  0,                                 \
+                                  NULL,                              \
+                                  subtype)
+
+/**
+ * @defgroup Eet_Data_Cipher_Group Eet Data Serialization using A Ciphers
+ *
+ * Most of the @ref Eet_Data_Group have alternative versions that
+ * accounts for ciphers to protect their content.
+ *
+ * @see @ref Eet_Cipher_Group
+ *
+ * @ingroup Eet_Data_Group
+ */
+
+/**
+ * Read a data structure from an eet file and decodes it using a cipher.
+ * @param ef The eet file handle to read from.
+ * @param edd The data descriptor handle to use when decoding.
+ * @param name The key the data is stored under in the eet file.
+ * @param cipher_key The key to use as cipher.
+ * @return A pointer to the decoded data structure.
+ *
+ * This function decodes a data structure stored in an eet file, returning
+ * a pointer to it if it decoded successfully, or NULL on failure. This
+ * can save a programmer dozens of hours of work in writing configuration
+ * file parsing and writing code, as eet does all that work for the program
+ * and presents a program-friendly data structure, just as the programmer
+ * likes. Eet can handle members being added or deleted from the data in
+ * storage and safely zero-fills unfilled members if they were not found
+ * in the data. It checks sizes and headers whenever it reads data, allowing
+ * the programmer to not worry about corrupt data.
+ *
+ * Once a data structure has been described by the programmer with the
+ * fields they wish to save or load, storing or retrieving a data structure
+ * from an eet file, or from a chunk of memory is as simple as a single
+ * function call.
+ *
+ * @see eet_data_read()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Cipher_Group
+ */
+EAPI void *
+eet_data_read_cipher(Eet_File *ef,
+                     Eet_Data_Descriptor *edd,
+                     const char *name,
+                     const char *cipher_key);
+
+/**
+ * Read a data structure from an eet extended attribute and decodes it using a cipher.
+ * @param filename The file to extract the extended attribute from.
+ * @param attribute The attribute to get the data from.
+ * @param edd The data descriptor handle to use when decoding.
+ * @param cipher_key The key to use as cipher.
+ * @return A pointer to the decoded data structure.
+ *
+ * This function decodes a data structure stored in an eet extended attribute,
+ * returning a pointer to it if it decoded successfully, or NULL on failure.
+ * Eet can handle members being added or deleted from the data in
+ * storage and safely zero-fills unfilled members if they were not found
+ * in the data. It checks sizes and headers whenever it reads data, allowing
+ * the programmer to not worry about corrupt data.
+ *
+ * Once a data structure has been described by the programmer with the
+ * fields they wish to save or load, storing or retrieving a data structure
+ * from an eet file, from a chunk of memory or from an extended attribute
+ * is as simple as a single function call.
+ *
+ * @since 1.5.0
+ * @ingroup Eet_Data_Cipher_Group
+ */
+EAPI void *
+eet_data_xattr_cipher_get(const char *filename,
+                          const char *attribute,
+                          Eet_Data_Descriptor *edd,
+                          const char *cipher_key);
+
+/**
+ * Write a data structure from memory and store in an eet file
+ * using a cipher.
+ * @param ef The eet file handle to write to.
+ * @param edd The data descriptor to use when encoding.
+ * @param name The key to store the data under in the eet file.
+ * @param cipher_key The key to use as cipher.
+ * @param data A pointer to the data structure to ssave and encode.
+ * @param compress Compression flags for storage.
+ * @return bytes written on successful write, 0 on failure.
+ *
+ * This function is the reverse of eet_data_read_cipher(), saving a data structure
+ * to an eet file.
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Cipher_Group
+ */
+EAPI int
+eet_data_write_cipher(Eet_File *ef,
+                      Eet_Data_Descriptor *edd,
+                      const char *name,
+                      const char *cipher_key,
+                      const void *data,
+                      int compress);
+
+/**
+ * Write a data structure from memory and store in an eet extended attribute
+ * using a cipher.
+ * @param filename The file to write the extended attribute to.
+ * @param attribute The attribute to store the data to.
+ * @param edd The data descriptor to use when encoding.
+ * @param cipher_key The key to use as cipher.
+ * @param data A pointer to the data structure to ssave and encode.
+ * @param flags The policy to use when setting the data.
+ * @return EINA_TRUE on success, EINA_FALSE on failure.
+ *
+ * This function is the reverse of eet_data_xattr_cipher_get(), saving a data structure
+ * to an eet extended attribute.
+ *
+ * @since 1.5.0
+ * @ingroup Eet_Data_Cipher_Group
+ */
+EAPI Eina_Bool
+eet_data_xattr_cipher_set(const char *filename,
+                          const char *attribute,
+                          Eet_Data_Descriptor *edd,
+                          const char *cipher_key,
+                          const void *data,
+                          Eina_Xattr_Flags flags);
+
+/**
+ * Dump an eet encoded data structure into ascii text using a cipher.
+ * @param data_in The pointer to the data to decode into a struct.
+ * @param cipher_key The key to use as cipher.
+ * @param size_in The size of the data pointed to in bytes.
+ * @param dumpfunc The function to call passed a string when new
+ *        data is converted to text
+ * @param dumpdata The data to pass to the @p dumpfunc callback.
+ * @return 1 on success, 0 on failure
+ *
+ * This function will take a chunk of data encoded by
+ * eet_data_descriptor_encode() and convert it into human readable
+ * ascii text.  It does this by calling the @p dumpfunc callback
+ * for all new text that is generated. This callback should append
+ * to any existing text buffer and will be passed the pointer @p
+ * dumpdata as a parameter as well as a string with new text to be
+ * appended.
+ *
+ * Example:
+ *
+ * @code
+ * void output(void *data, const char *string)
+ * {
+ *   printf("%s", string);
+ * }
+ *
+ * void dump(const char *file)
+ * {
+ *   FILE *f;
+ *   int len;
+ *   void *data;
+ *
+ *   f = fopen(file, "r");
+ *   fseek(f, 0, SEEK_END);
+ *   len = ftell(f);
+ *   rewind(f);
+ *   data = malloc(len);
+ *   fread(data, len, 1, f);
+ *   fclose(f);
+ *   eet_data_text_dump_cipher(data, cipher_key, len, output, NULL);
+ * }
+ * @endcode
+ *
+ * @see eet_data_text_dump()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Cipher_Group
+ */
+EAPI int
+eet_data_text_dump_cipher(const void *data_in,
+                          const char *cipher_key,
+                          int size_in,
+                          Eet_Dump_Callback dumpfunc,
+                          void *dumpdata);
+
+/**
+ * Take an ascii encoding from eet_data_text_dump() and re-encode
+ * in binary using a cipher.
+ * @param text The pointer to the string data to parse and encode.
+ * @param cipher_key The key to use as cipher.
+ * @param textlen The size of the string in bytes (not including 0
+ *        byte terminator).
+ * @param size_ret This gets filled in with the encoded data blob
+ *        size in bytes.
+ * @return The encoded data on success, NULL on failure.
+ *
+ * This function will parse the string pointed to by @p text and return
+ * an encoded data lump the same way eet_data_descriptor_encode() takes an
+ * in-memory data struct and encodes into a binary blob. @p text is a normal
+ * C string.
+ *
+ * @see eet_data_text_undump()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Cipher_Group
+ */
+EAPI void *
+eet_data_text_undump_cipher(const char *text,
+                            const char *cipher_key,
+                            int textlen,
+                            int *size_ret);
+
+/**
+ * Dump an eet encoded data structure from an eet file into ascii
+ * text using a cipher.
+ * @param ef A valid eet file handle.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param cipher_key The key to use as cipher.
+ * @param dumpfunc The function to call passed a string when new
+ *        data is converted to text
+ * @param dumpdata The data to pass to the @p dumpfunc callback.
+ * @return 1 on success, 0 on failure
+ *
+ * This function will take an open and valid eet file from
+ * eet_open() request the data encoded by
+ * eet_data_descriptor_encode() corresponding to the key @p name
+ * and convert it into human readable ascii text. It does this by
+ * calling the @p dumpfunc callback for all new text that is
+ * generated. This callback should append to any existing text
+ * buffer and will be passed the pointer @p dumpdata as a parameter
+ * as well as a string with new text to be appended.
+ *
+ * @see eet_data_dump()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Cipher_Group
+ */
+EAPI int
+eet_data_dump_cipher(Eet_File *ef,
+                     const char *name,
+                     const char *cipher_key,
+                     Eet_Dump_Callback dumpfunc,
+                     void *dumpdata);
+
+/**
+ * Take an ascii encoding from eet_data_dump() and re-encode in
+ * binary using a cipher.
+ * @param ef A valid eet file handle.
+ * @param name Name of the entry. eg: "/base/file_i_want".
+ * @param cipher_key The key to use as cipher.
+ * @param text The pointer to the string data to parse and encode.
+ * @param textlen The size of the string in bytes (not including 0
+ *        byte terminator).
+ * @param compress Compression flags (1 == compress, 0 = don't compress).
+ * @return 1 on success, 0 on failure
+ *
+ * This function will parse the string pointed to by @p text,
+ * encode it the same way eet_data_descriptor_encode() takes an
+ * in-memory data struct and encodes into a binary blob.
+ *
+ * The data (optionally compressed) will be in ram, pending a flush to
+ * disk (it will stay in ram till the eet file handle is closed though).
+ *
+ * @see eet_data_undump()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Cipher_Group
+ */
+EAPI int
+eet_data_undump_cipher(Eet_File *ef,
+                       const char *name,
+                       const char *cipher_key,
+                       const char *text,
+                       int textlen,
+                       int compress);
+
+/**
+ * Decode a data structure from an arbitrary location in memory
+ * using a cipher.
+ * @param edd The data  descriptor to use when decoding.
+ * @param data_in The pointer to the data to decode into a struct.
+ * @param cipher_key The key to use as cipher.
+ * @param size_in The size of the data pointed to in bytes.
+ * @return NULL on failure, or a valid decoded struct pointer on success.
+ *
+ * This function will decode a data structure that has been encoded using
+ * eet_data_descriptor_encode(), and return a data structure with all its
+ * elements filled out, if successful, or NULL on failure.
+ *
+ * The data to be decoded is stored at the memory pointed to by @p data_in,
+ * and is described by the descriptor pointed to by @p edd. The data size is
+ * passed in as the value to @p size_in, ande must be greater than 0 to
+ * succeed.
+ *
+ * This function is useful for decoding data structures delivered to the
+ * application by means other than an eet file, such as an IPC or socket
+ * connection, raw files, shared memory etc.
+ *
+ * Please see eet_data_read() for more information.
+ *
+ * @see eet_data_descriptor_decode()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Cipher_Group
+ */
+EAPI void *
+eet_data_descriptor_decode_cipher(Eet_Data_Descriptor *edd,
+                                  const void *data_in,
+                                  const char *cipher_key,
+                                  int size_in);
+
+/**
+ * Encode a data struct to memory and return that encoded data
+ * using a cipher.
+ * @param edd The data  descriptor to use when encoding.
+ * @param data_in The pointer to the struct to encode into data.
+ * @param cipher_key The key to use as cipher.
+ * @param size_ret pointer to the an int to be filled with the decoded size.
+ * @return NULL on failure, or a valid encoded data chunk on success.
+ *
+ * This function takes a data structutre in memory and encodes it into a
+ * serialised chunk of data that can be decoded again by
+ * eet_data_descriptor_decode(). This is useful for being able to transmit
+ * data structures across sockets, pipes, IPC or shared file mechanisms,
+ * without having to worry about memory space, machine type, endianess etc.
+ *
+ * The parameter @p edd must point to a valid data descriptor, and
+ * @p data_in must point to the right data structure to encode. If not, the
+ * encoding may fail.
+ *
+ * On success a non NULL valid pointer is returned and what @p size_ret
+ * points to is set to the size of this decoded data, in bytes. When the
+ * encoded data is no longer needed, call free() on it. On failure NULL is
+ * returned and what @p size_ret points to is set to 0.
+ *
+ * Please see eet_data_write() for more information.
+ *
+ * @see eet_data_descriptor_encode()
+ *
+ * @since 1.0.0
+ * @ingroup Eet_Data_Cipher_Group
+ */
+EAPI void *
+eet_data_descriptor_encode_cipher(Eet_Data_Descriptor *edd,
+                                  const void *data_in,
+                                  const char *cipher_key,
+                                  int *size_ret);
+
+/**
+ * @defgroup Eet_Node_Group Low-level Serialization Structures.
+ *
+ * Functions that create, destroy and manipulate serialization nodes
+ * used by @ref Eet_Data_Group.
+ *
+ * @{
+ */
+
+/**
+ * @typedef Eet_Node
+ * Opaque handle to manage serialization node.
+ */
+typedef struct _Eet_Node Eet_Node;
+
+/**
+ * @typedef Eet_Node_Data
+ * Contains an union that can fit any kind of node.
+ */
+typedef struct _Eet_Node_Data Eet_Node_Data;
+
+/**
+ * @struct _Eet_Node_Data
+ * Contains an union that can fit any kind of node.
+ */
+struct _Eet_Node_Data
+{
+   union {
+      char               c;
+      short              s;
+      int                i;
+      long long          l;
+      float              f;
+      double             d;
+      unsigned char      uc;
+      unsigned short     us;
+      unsigned int       ui;
+      unsigned long long ul;
+      const char        *str;
+   } value;
+};
+
+/**
+ * @}
+ */
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_char_new(const char *name,
+                  char c);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_short_new(const char *name,
+                   short s);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_int_new(const char *name,
+                 int i);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_long_long_new(const char *name,
+                       long long l);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_float_new(const char *name,
+                   float f);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_double_new(const char *name,
+                    double d);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_unsigned_char_new(const char *name,
+                           unsigned char uc);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_unsigned_short_new(const char *name,
+                            unsigned short us);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_unsigned_int_new(const char *name,
+                          unsigned int ui);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_unsigned_long_long_new(const char *name,
+                                unsigned long long l);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_string_new(const char *name,
+                    const char *str);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_inlined_string_new(const char *name,
+                            const char *str);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_null_new(const char *name);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_list_new(const char *name,
+                  Eina_List *nodes);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_array_new(const char *name,
+                   int count,
+                   Eina_List *nodes);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_var_array_new(const char *name,
+                       Eina_List *nodes);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_hash_new(const char *name,
+                  const char *key,
+                  Eet_Node *node);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_struct_new(const char *name,
+                    Eina_List *nodes);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_node_struct_child_new(const char *parent,
+                          Eet_Node *child);
+
+/**
+ * @brief Get a node's child nodes
+ * @param node The node
+ * @return The first child node which contains a pointer to the
+ * next child node and the parent.
+ * @since 1.5
+ */
+EAPI Eet_Node *
+eet_node_children_get(Eet_Node *node);
+
+/**
+ * @brief Get the next node in a list of nodes
+ * @param node The node
+ * @return A node which contains a pointer to the
+ * next child node and the parent.
+ * @since 1.5
+ */
+EAPI Eet_Node *
+eet_node_next_get(Eet_Node *node);
+
+/**
+ * @brief Get the parent node of a node
+ * @param node The node
+ * @return The parent node of @p node
+ * @since 1.5
+ */
+EAPI Eet_Node *
+eet_node_parent_get(Eet_Node *node);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI void
+eet_node_list_append(Eet_Node *parent,
+                     const char *name,
+                     Eet_Node *child);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI void
+eet_node_struct_append(Eet_Node *parent,
+                       const char *name,
+                       Eet_Node *child);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI void
+eet_node_hash_add(Eet_Node *parent,
+                  const char *name,
+                  const char *key,
+                  Eet_Node *child);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI void
+eet_node_dump(Eet_Node *n,
+              int dumplevel,
+              Eet_Dump_Callback dumpfunc,
+              void *dumpdata);
+
+/**
+ * @brief Return the type of a node
+ * @param node The node
+ * @return The node's type (EET_T_$TYPE)
+ * @since 1.5
+ */
+EAPI int
+eet_node_type_get(Eet_Node *node);
+
+/**
+ * @brief Return the node's data
+ * @param node The node
+ * @return The data contained in the node
+ * @since 1.5
+ */
+EAPI Eet_Node_Data *
+eet_node_value_get(Eet_Node *node);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI void
+eet_node_del(Eet_Node *n);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI void *
+eet_data_node_encode_cipher(Eet_Node *node,
+                            const char *cipher_key,
+                            int *size_ret);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_data_node_decode_cipher(const void *data_in,
+                            const char *cipher_key,
+                            int size_in);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI Eet_Node *
+eet_data_node_read_cipher(Eet_File *ef,
+                          const char *name,
+                          const char *cipher_key);
+
+/**
+ * TODO FIX ME
+ * @ingroup Eet_Node_Group
+ */
+EAPI int
+eet_data_node_write_cipher(Eet_File *ef,
+                           const char *name,
+                           const char *cipher_key,
+                           Eet_Node *node,
+                           int compress);
+
+/* EXPERIMENTAL: THIS API MAY CHANGE IN THE FUTURE, USE IT ONLY IF YOU KNOW WHAT YOU ARE DOING. */
+
+/**
+ * @typedef Eet_Node_Walk
+ * Describes how to walk trees of #Eet_Node.
+ */
+typedef struct _Eet_Node_Walk Eet_Node_Walk;
+
+typedef void *              (*Eet_Node_Walk_Struct_Alloc_Callback)(const char *type, void *user_data);
+typedef void                (*Eet_Node_Walk_Struct_Add_Callback)(void *parent, const char *name, void *child, void *user_data);
+typedef void *              (*Eet_Node_Walk_Array_Callback)(Eina_Bool variable, const char *name, int count, void *user_data);
+typedef void                (*Eet_Node_Walk_Insert_Callback)(void *array, int index, void *child, void *user_data);
+typedef void *              (*Eet_Node_Walk_List_Callback)(const char *name, void *user_data);
+typedef void                (*Eet_Node_Walk_Append_Callback)(void *list, void *child, void *user_data);
+typedef void *              (*Eet_Node_Walk_Hash_Callback)(void *parent, const char *name, const char *key, void *value, void *user_data);
+typedef void *              (*Eet_Node_Walk_Simple_Callback)(int type, Eet_Node_Data *data, void *user_data);
+
+/**
+ * @struct _Eet_Node_Walk
+ * Describes how to walk trees of #Eet_Node.
+ */
+struct _Eet_Node_Walk
+{
+   Eet_Node_Walk_Struct_Alloc_Callback struct_alloc;
+   Eet_Node_Walk_Struct_Add_Callback   struct_add;
+   Eet_Node_Walk_Array_Callback        array;
+   Eet_Node_Walk_Insert_Callback       insert;
+   Eet_Node_Walk_List_Callback         list;
+   Eet_Node_Walk_Append_Callback       append;
+   Eet_Node_Walk_Hash_Callback         hash;
+   Eet_Node_Walk_Simple_Callback       simple;
+};
+
+EAPI void *
+eet_node_walk(void *parent,
+              const char *name,
+              Eet_Node *root,
+              Eet_Node_Walk *cb,
+              void *user_data);
+
+/*******/
+
+/**
+ * @defgroup Eet_Connection_Group Helper function to use eet over a network link
+ *
+ * Function that reconstruct and prepare packet of @ref Eet_Data_Group to be send.
+ *
+ */
+
+/**
+ * @typedef Eet_Connection
+ * Opaque handle to track paquet for a specific connection.
+ *
+ * @ingroup Eet_Connection_Group
+ */
+typedef struct _Eet_Connection Eet_Connection;
+
+/**
+ * @typedef Eet_Read_Cb
+ * Called back when an @ref Eet_Data_Group has been received completly and could be used.
+ *
+ * @ingroup Eet_Connection_Group
+ */
+typedef Eina_Bool Eet_Read_Cb (const void *eet_data, size_t size, void *user_data);
+
+/**
+ * @typedef Eet_Write_Cb
+ * Called back when a packet containing @ref Eet_Data_Group data is ready to be send.
+ *
+ * @ingroup Eet_Connection_Group
+ */
+typedef Eina_Bool Eet_Write_Cb (const void *data, size_t size, void *user_data);
+
+/**
+ * Instanciate a new connection to track.
+ * @param eet_read_cb Function to call when one Eet_Data packet has been fully assemble.
+ * @param eet_write_cb Function to call when one Eet_Data packet is ready to be send over the wire.
+ * @param user_data Pointer provided to both functions to be used as a context handler.
+ * @return NULL on failure, or a valid Eet_Connection handler.
+ *
+ * For every connection to track you will need a separate Eet_Connection provider.
+ *
+ * @since 1.2.4
+ * @ingroup Eet_Connection_Group
+ */
+EAPI Eet_Connection *
+eet_connection_new(Eet_Read_Cb *eet_read_cb,
+                   Eet_Write_Cb *eet_write_cb,
+                   const void *user_data);
+
+/**
+ * Process a raw packet received over the link
+ * @param conn Connection handler to track.
+ * @param data Raw data packet.
+ * @param size The size of that packet.
+ * @return 0 on complete success, any other value indicate where in the stream it got wrong (It could be before that packet).
+ *
+ * Every time you receive a packet related to your connection, you should pass
+ * it to that function so that it could process and assemble packet has you
+ * receive it. It will automatically call Eet_Read_Cb when one is fully received.
+ *
+ * @since 1.2.4
+ * @ingroup Eet_Connection_Group
+ */
+EAPI int
+eet_connection_received(Eet_Connection *conn,
+                        const void *data,
+                        size_t size);
+
+/**
+ * Convert a complex structure and prepare it to be send.
+ * @param conn Connection handler to track.
+ * @param edd The data descriptor to use when encoding.
+ * @param data_in The pointer to the struct to encode into data.
+ * @param cipher_key The key to use as cipher.
+ * @return EINA_TRUE if the data where correctly send, EINA_FALSE if they don't.
+ *
+ * This function serialize data_in with edd, assemble the packet and call
+ * Eet_Write_Cb when ready. The data passed Eet_Write_Cb are temporary allocated
+ * and will vanish just after the return of the callback.
+ *
+ * @see eet_data_descriptor_encode_cipher
+ *
+ * @since 1.2.4
+ * @ingroup Eet_Connection_Group
+ */
+EAPI Eina_Bool
+eet_connection_send(Eet_Connection *conn,
+                    Eet_Data_Descriptor *edd,
+                    const void *data_in,
+                    const char *cipher_key);
+
+/**
+ * Convert a Eet_Node tree and prepare it to be send.
+ * @param conn Connection handler to track.
+ * @param node The data tree to use when encoding.
+ * @param cipher_key The key to use as cipher.
+ * @return EINA_TRUE if the data where correctly send, EINA_FALSE if they don't.
+ *
+ * This function serialize node, assemble the packet and call
+ * Eet_Write_Cb when ready. The data passed Eet_Write_Cb are temporary allocated
+ * and will vanish just after the return of the callback.
+ *
+ * @see eet_data_node_encode_cipher
+ *
+ * @since 1.2.4
+ * @ingroup Eet_Connection_Group
+ */
+EAPI Eina_Bool
+eet_connection_node_send(Eet_Connection *conn,
+                         Eet_Node *node,
+                         const char *cipher_key);
+
+/**
+ * Close a connection and lost its track.
+ * @param conn Connection handler to close.
+ * @param on_going Signal if a partial packet wasn't completed.
+ * @return the user_data passed to both callback.
+ *
+ * @since 1.2.4
+ * @ingroup Eet_Connection_Group
+ */
+EAPI void *
+eet_connection_close(Eet_Connection *conn,
+                     Eina_Bool *on_going);
+
+/***************************************************************************/
+
+#ifdef __cplusplus
+}
+#endif /* ifdef __cplusplus */
+
+#endif /* ifndef _EET_H */