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-/* EINA - EFL data type library
- * Copyright (C) 2002-2008 Carsten Haitzler, Jorge Luis Zapata Muga, Cedric Bail
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library;
- * if not, see <http://www.gnu.org/licenses/>.
- *
- * This file incorporates work covered by the following copyright and
- * permission notice:
- *
- * Copyright (C) 2008 Peter Wehrfritz
- *
- *  Permission is hereby granted, free of charge, to any person obtaining a copy
- *  of this software and associated documentation files (the "Software"), to
- *  deal in the Software without restriction, including without limitation the
- *  rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- *  sell copies of the Software, and to permit persons to whom the Software is
- *  furnished to do so, subject to the following conditions:
- *
- *  The above copyright notice and this permission notice shall be included in
- *  all copies of the Software and its Copyright notices. In addition publicly
- *  documented acknowledgment must be given that this software has been used if no
- *  source code of this software is made available publicly. This includes
- *  acknowledgments in either Copyright notices, Manuals, Publicity and Marketing
- *  documents or any documentation provided with any product containing this
- *  software. This License does not apply to any software that links to the
- *  libraries provided by this software (statically or dynamically), but only to
- *  the software provided.
- *
- *  Please see the OLD-COPYING.PLAIN for a plain-english explanation of this notice
- *  and it's intent.
- *
- *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- *  THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
- *  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- *  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#ifndef EINA_STRINGSHARE_H_
-#define EINA_STRINGSHARE_H_
-
-#include <stdarg.h>
-
-#include "eina_types.h"
-
-/**
- * @page eina_stringshare_example_01_page
- * @dontinclude eina_stringshare_01.c
- *
- * Like all examples we start by including Eina:
- * @skip #include
- * @line #include
- *
- * Here we declare some variables and initialize eina:
- * @until eina_init
- *
- * We start the substantive part of the example by showing how to make a part
- * of a string shared and how to get the length of a shared string:
- * @until stringshare_strlen
- * As we add shared strings we also need to delete them when done using them:
- * @line del
- *
- * There are many ways of creating shared strings including an equivalent to
- * sprintf:
- * @until del
- *
- * An equivalent to snprintf:
- * @until printf
- *
- * But the simplest way of creating a shared string is through
- * eina_stringshare_add():
- * @until printf
- *
- * Sometimes you already have a pointer to a shared string and want to use it,
- * so to make sure the provider of the pointer won't free it while you're using
- * it you can increase the shared string's ref count:
- * @until printf
- *
- * Whenever you have a pointer to a shared string and would like to change it's
- * value you should use eina_stringshare_replace():
- * @until printf
- * @warning @b Don't use eina_stringshare_del() followed by
- * eina_share_common_add(), under some circunstances you might end up deleting
- * a shared string some other piece of code is using.
- *
- * We created str but haven't deleted it yet, and while we called
- * eina_stringshare_del() on str2, we created it and then increased the ref
- * count so it's still alive:
- * @until str2
- *
- * You can see the full source code @ref eina_stringshare_example_01 "here".
- */
-/**
- * @page eina_stringshare_example_01
- * @include eina_stringshare_01.c
- * @example eina_stringshare_01.c
- */
-/**
- * @addtogroup Eina_Stringshare_Group Stringshare
- *
- * These functions allow you to store a single copy of a string, and use in
- * multiple places throughout your program.
- *
- * This is a method to reduce the number of duplicated strings kept in
- * memory. It's pretty common for the same strings to be dynamically
- * allocated repeatedly between applications and libraries, especially in
- * circumstances where you could have multiple copies of a structure that
- * allocates the string. So rather than duplicating and freeing these
- * strings, you request a read-only pointer to an existing string and
- * only incur the overhead of a hash lookup.
- *
- * It sounds like micro-optimizing, but profiling has shown this can have
- * a significant impact as you scale the number of copies up. It improves
- * string creation/destruction speed, reduces memory use and decreases
- * memory fragmentation, so a win all-around.
- *
- * Using eina stringshares usually boils down to:
- * @code
- * const char *str = eina_stringshare_add("My string");
- * ...
- * //Use str
- * ...
- * eina_stringshare_del(str);
- * @endcode
- * @note It's very important to note that string shares are @b @c const,
- * changing them will result in undefined behavior.
- * @note eina_stringshare_del() @b doesn't guarantee the string share will be
- * freed, it releases a reference to it, but if other references to it still
- * exist the string share will live until those are released.
- *
- * The following diagram gives an idea of what happens as you create strings
- * with eina_stringshare_add():
- *
- * @image html eina_stringshare.png
- * @image latex eina_stringshare.eps height=\textheight
- *
- * For more information, see @ref eina_stringshare_example_01_page
- * "this example".
- */
-
-/**
- * @addtogroup Eina_Data_Types_Group Data Types
- *
- * @{
- */
-
-/**
- * @defgroup Eina_Stringshare_Group Stringshare
- *
- * @{
- */
-
-/**
- * @typedef Eina_Stringshare
- *
- * Interchangeable with "const char *" but still a good visual hint for the
- * purpose. Maybe in the far far future we'll even add strict type checking.
- *
- * @since 1.2.0
- */
-typedef const char Eina_Stringshare;
-
-/**
- * @brief Retrieve an instance of a string for use in a program.
- *
- * @param   str The string to retrieve an instance of.
- * @param   slen The string size (<= strlen(str)).
- * @return  A pointer to an instance of the string on success.
- *          @c NULL on failure.
- *
- * This function retrieves an instance of @p str. If @p str is
- * @c NULL, then @c NULL is returned. If @p str is already stored, it
- * is just returned and its reference counter is increased. Otherwise
- * a duplicated string of @p str is returned.
- *
- * This function does not check string size, but uses the
- * exact given size. This can be used to share_common part of a larger
- * buffer or substring.
- *
- * @see eina_share_common_add()
- */
-EAPI Eina_Stringshare  *eina_stringshare_add_length(const char *str, unsigned int slen) EINA_WARN_UNUSED_RESULT;
-
-/**
- * @brief Retrieve an instance of a string for use in a program.
- *
- * @param   str The NULL terminated string to retrieve an instance of.
- * @return  A pointer to an instance of the string on success.
- *          @c NULL on failure.
- *
- * This function retrieves an instance of @p str. If @p str is
- * @c NULL, then @c NULL is returned. If @p str is already stored, it
- * is just returned and its reference counter is increased. Otherwise
- * a duplicated string of @p str is returned.
- *
- * The string @p str must be NULL terminated ('@\0') and its full
- * length will be used. To use part of the string or non-null
- * terminated, use eina_stringshare_add_length() instead.
- *
- * @see eina_stringshare_add_length()
- */
-EAPI Eina_Stringshare  *eina_stringshare_add(const char *str) EINA_WARN_UNUSED_RESULT;
-
-/**
- * @brief Retrieve an instance of a string for use in a program
- * from a format string.
- *
- * @param   fmt The NULL terminated format string to retrieve an instance of.
- * @return  A pointer to an instance of the string on success.
- *          @c NULL on failure.
- *
- * This function retrieves an instance of @p fmt. If @p fmt is
- * @c NULL, then @c NULL is returned. If @p fmt is already stored, it
- * is just returned and its reference counter is increased. Otherwise
- * a duplicated string is returned.
- *
- * The format string @p fmt must be NULL terminated ('@\0') and its full
- * length will be used. To use part of the format string or non-null
- * terminated, use eina_stringshare_nprintf() instead.
- *
- * @see eina_stringshare_nprintf()
- */
-EAPI Eina_Stringshare  *eina_stringshare_printf(const char *fmt, ...) EINA_WARN_UNUSED_RESULT EINA_PRINTF(1, 2);
-
-/**
- * @brief Retrieve an instance of a string for use in a program
- * from a format string.
- *
- * @param   fmt The NULL terminated format string to retrieve an instance of.
- * @param   args The va_args for @p fmt
- * @return  A pointer to an instance of the string on success.
- *          @c NULL on failure.
- *
- * This function retrieves an instance of @p fmt with @p args. If @p fmt is
- * @c NULL, then @c NULL is returned. If @p fmt with @p args is already stored, it
- * is just returned and its reference counter is increased. Otherwise
- * a duplicated string is returned.
- *
- * The format string @p fmt must be NULL terminated ('@\0') and its full
- * length will be used. To use part of the format string or non-null
- * terminated, use eina_stringshare_nprintf() instead.
- *
- * @see eina_stringshare_nprintf()
- */
-EAPI Eina_Stringshare  *eina_stringshare_vprintf(const char *fmt, va_list args) EINA_WARN_UNUSED_RESULT;
-
-/**
- * @brief Retrieve an instance of a string for use in a program
- * from a format string with size limitation.
- * @param   len The length of the format string to use
- * @param   fmt The format string to retrieve an instance of.
- * @return  A pointer to an instance of the string on success.
- *          @c NULL on failure.
- *
- * This function retrieves an instance of @p fmt limited by @p len. If @p fmt is
- * @c NULL or @p len is < 1, then @c NULL is returned. If the resulting string
- * is already stored, it is returned and its reference counter is increased.
- * Otherwise a duplicated string is returned.
- *
- * @p len length of the format string will be used. To use the
- * entire format string, use eina_stringshare_printf() instead.
- *
- * @see eina_stringshare_printf()
- */
-EAPI Eina_Stringshare  *eina_stringshare_nprintf(unsigned int len, const char *fmt, ...) EINA_WARN_UNUSED_RESULT EINA_PRINTF(2, 3);
-
-/**
- * Increment references of the given shared string.
- *
- * @param str The shared string.
- * @return    A pointer to an instance of the string on success.
- *            @c NULL on failure.
- *
- * This is similar to eina_share_common_add(), but it's faster since it will
- * avoid lookups if possible, but on the down side it requires the parameter
- * to be shared string. In other words, it must be the return of a previous
- * call to one of the stringshare functions.
- *
- * There is no unref since this is the work of eina_share_common_del().
- */
-EAPI Eina_Stringshare  *eina_stringshare_ref(Eina_Stringshare *str);
-
-/**
- * @brief Note that the given string has lost an instance.
- *
- * @param str string The given string.
- *
- * This function decreases the reference counter associated to @p str
- * if it exists. If that counter reaches 0, the memory associated to
- * @p str is freed. If @p str is NULL, the function returns
- * immediately.
- *
- * Note that if the given pointer is not shared or NULL, bad things
- * will happen, likely a segmentation fault.
- */
-EAPI void               eina_stringshare_del(Eina_Stringshare *str);
-
-/**
- * @brief Note that the given string @b must be shared.
- *
- * @param str the shared string to know the length. It is safe to
- *        give NULL, in that case -1 is returned.
- * @return The length of a shared string.
- *
- * This function is a cheap way to known the length of a shared
- * string. Note that if the given pointer is not shared, bad
- * things will happen, likely a segmentation fault. If in doubt, try
- * strlen().
- */
-EAPI int                eina_stringshare_strlen(Eina_Stringshare *str) EINA_PURE EINA_WARN_UNUSED_RESULT;
-
-/**
- * @brief Dump the contents of the share_common.
- *
- * This function dumps all strings in the share_common to stdout with a
- * DDD: prefix per line and a memory usage summary.
- */
-EAPI void               eina_stringshare_dump(void);
-
-static inline Eina_Bool eina_stringshare_replace(Eina_Stringshare **p_str, const char *news) EINA_ARG_NONNULL(1);
-static inline Eina_Bool eina_stringshare_replace_length(Eina_Stringshare **p_str, const char *news, unsigned int slen) EINA_ARG_NONNULL(1);
-
-#include "eina_inline_stringshare.x"
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-#endif /* EINA_STRINGSHARE_H_ */