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/* EINA - EFL data type library
* Copyright (C) 2011 Gustavo Sverzut Barbieri
* 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/>.
*/
#ifndef EINA_SIMPLE_XML_H_
#define EINA_SIMPLE_XML_H_
#include "eina_config.h"
#include "eina_types.h"
#include "eina_magic.h"
#include "eina_inlist.h"
/**
* @defgroup Eina_Simple_XML_Group Simple_XML
*
* Simplistic relaxed SAX-like XML parser.
*
* This parser is far from being compliant with XML standard, but will
* do for most XMLs out there. If you know that your format is simple
* and will not vary in future with strange corner cases, then you can
* use it safely.
*
* The parser is SAX like, that is, it will tokenize contents and call
* you back so you can take some action. No contents are allocated
* during this parser work and it's not recursive, so you can use it
* with a very large document without worries.
*
* It will not validate the document anyhow, neither it will create a
* tree hierarchy. That's up to you.
*
* Accordingly to XML, open tags may contain attributes. This parser
* will not tokenize this. If you want you can use
* eina_simple_xml_tag_attributes_find() and then
* eina_simple_xml_attributes_parse().
*/
/**
* @addtogroup Eina_Tools_Group Tools
*
* @{
*/
/**
* @defgroup Eina_Simple_XML_Group Simple_XML
*
* @{
*/
typedef struct _Eina_Simple_XML_Node Eina_Simple_XML_Node;
typedef struct _Eina_Simple_XML_Node_Tag Eina_Simple_XML_Node_Root;
typedef struct _Eina_Simple_XML_Node_Tag Eina_Simple_XML_Node_Tag;
typedef struct _Eina_Simple_XML_Node_Data Eina_Simple_XML_Node_Data;
typedef struct _Eina_Simple_XML_Node_Data Eina_Simple_XML_Node_CData;
typedef struct _Eina_Simple_XML_Node_Data Eina_Simple_XML_Node_Processing;
typedef struct _Eina_Simple_XML_Node_Data Eina_Simple_XML_Node_Doctype;
typedef struct _Eina_Simple_XML_Node_Data Eina_Simple_XML_Node_Comment;
typedef struct _Eina_Simple_XML_Attribute Eina_Simple_XML_Attribute;
struct _Eina_Simple_XML_Attribute
{
EINA_INLIST;
EINA_MAGIC;
Eina_Simple_XML_Node_Tag *parent;
const char *key;
const char *value;
};
typedef enum _Eina_Simple_XML_Node_Type
{
EINA_SIMPLE_XML_NODE_ROOT = 0,
EINA_SIMPLE_XML_NODE_TAG,
EINA_SIMPLE_XML_NODE_DATA,
EINA_SIMPLE_XML_NODE_CDATA,
EINA_SIMPLE_XML_NODE_PROCESSING,
EINA_SIMPLE_XML_NODE_DOCTYPE,
EINA_SIMPLE_XML_NODE_COMMENT
} Eina_Simple_XML_Node_Type;
struct _Eina_Simple_XML_Node
{
EINA_INLIST;
EINA_MAGIC;
Eina_Simple_XML_Node_Tag *parent;
Eina_Simple_XML_Node_Type type;
};
struct _Eina_Simple_XML_Node_Tag
{
Eina_Simple_XML_Node base;
Eina_Inlist *children;
Eina_Inlist *attributes;
const char *name;
};
struct _Eina_Simple_XML_Node_Data
{
Eina_Simple_XML_Node base;
size_t length;
char data[];
};
typedef enum _Eina_Simple_XML_Type
{
EINA_SIMPLE_XML_OPEN = 0, /*!< <tag attribute="value"> */
EINA_SIMPLE_XML_OPEN_EMPTY, /*!< <tag attribute="value" /> */
EINA_SIMPLE_XML_CLOSE, /*!< </tag> */
EINA_SIMPLE_XML_DATA, /*!< tag text data */
EINA_SIMPLE_XML_CDATA, /*!< <![CDATA[something]]> */
EINA_SIMPLE_XML_ERROR, /*!< error contents */
EINA_SIMPLE_XML_PROCESSING, /*!< <?xml ... ?> <?php .. ?> */
EINA_SIMPLE_XML_DOCTYPE, /*!< <!DOCTYPE html */
EINA_SIMPLE_XML_COMMENT, /*!< <!-- something --> */
EINA_SIMPLE_XML_IGNORED /*!< whatever is ignored by parser, like whitespace */
} Eina_Simple_XML_Type;
typedef Eina_Bool (*Eina_Simple_XML_Cb)(void *data, Eina_Simple_XML_Type type, const char *content, unsigned offset, unsigned length);
typedef Eina_Bool (*Eina_Simple_XML_Attribute_Cb)(void *data, const char *key, const char *value);
/**
* Parse a section of XML string text
*
* @param buf the input string. May not contain \0 terminator.
* @param buflen the input string size.
* @param strip whenever this parser should strip leading and trailing
* whitespace. These whitespace will still be issued, but as type
* #EINA_SIMPLE_XML_IGNORED.
* @param func what to call back while parse to do some action. The
* first parameter is the given user @a data, the second is the
* token type, the third is the pointer to content start (it's
* not a NULL terminated string!), the forth is where this
* content is located inside @a buf (does not include tag
* start, for instance "<!DOCTYPE value>" the offset points at
* "value"), the fifth is the size of the content. Whenever this
* function return EINA_FALSE the parser will abort. @param
* data what to give as context to @a func.
*
* @return EINA_TRUE on success or EINA_FALSE if it was aborted by user or
* parsing error.
*/
EAPI Eina_Bool eina_simple_xml_parse(const char *buf, unsigned buflen,
Eina_Bool strip,
Eina_Simple_XML_Cb func, const void *data);
/**
* Given the contents of a tag, find where the attributes start.
*
* @param buf the input string. May not contain \0 terminator.
* @param buflen the input string size.
* @return pointer to the start of attributes, it can be used
* to feed eina_simple_xml_attributes_parse(). NULL is returned
* if no attributes were found.
*
* The tag contents is returned by eina_simple_xml_parse() when
* type is #EINA_SIMPLE_XML_OPEN or #EINA_SIMPLE_XML_OPEN_EMPTY.
*
*/
EAPI const char * eina_simple_xml_tag_attributes_find(const char *buf, unsigned buflen);
/**
* Given a buffer with xml attributes, parse them to key=value pairs.
*
* @param buf the input string. May not contain \0 terminator.
* @param buflen the input string size.
* @param func what to call back while parse to do some action. The
* first parameter is the given user @a data, the second is the
* key (null-terminated) and the last is the value (null
* terminated). These strings should not be modified and
* reference is just valid until the function return.
* @param data data to pass to the callback function.
*
* @return EINA_TRUE on success or EINA_FALSE if it was aborted by user or
* parsing error.
*/
EAPI Eina_Bool eina_simple_xml_attributes_parse(const char *buf, unsigned buflen,
Eina_Simple_XML_Attribute_Cb func, const void *data);
/**
* Create (and append) new attribute to tag.
*
* @param parent if provided, will be set in the resulting structure
* as well as the attribute will be appended to attributes list.
* @param key null-terminated string. Must not be NULL.
* @param value null-terminated string. If NULL, the empty string will be used.
*
* @return newly allocated memory or NULL on error. This memory should be
* released with eina_simple_xml_attribute_free() or indirectly
* with eina_simple_xml_node_tag_free().
*/
EAPI Eina_Simple_XML_Attribute * eina_simple_xml_attribute_new(Eina_Simple_XML_Node_Tag *parent, const char *key, const char *value);
/**
* Remove attribute from parent and delete it.
*
* @param attr attribute to release memory.
*/
EAPI void eina_simple_xml_attribute_free(Eina_Simple_XML_Attribute *attr);
/**
* Create new tag. If parent is provided, it is automatically appended.
*
* @param parent if provided, will be set in the resulting structure
* as well as the tag will be appended to children list.
* @param name null-terminated string. Must not be NULL.
*
* @return newly allocated memory or NULL on error. This memory should be
* released with eina_simple_xml_node_tag_free() or indirectly
* with eina_simple_xml_node_tag_free() of the parent.
*/
EAPI Eina_Simple_XML_Node_Tag * eina_simple_xml_node_tag_new(Eina_Simple_XML_Node_Tag *parent, const char *name);
/**
* Remove tag from parent and delete it.
*
* @param tag to release memory.
*/
EAPI void eina_simple_xml_node_tag_free(Eina_Simple_XML_Node_Tag *tag);
/**
* Create new data. If parent is provided, it is automatically appended.
*
* @param parent if provided, will be set in the resulting structure
* as well as the data will be appended to children list.
* @param contents string to be used. Must not be NULL.
* @param length size in bytes of @a contents.
*
* @return newly allocated memory or NULL on error. This memory should be
* released with eina_simple_xml_node_data_free() or indirectly
* with eina_simple_xml_node_tag_free() of the parent.
*/
EAPI Eina_Simple_XML_Node_Data * eina_simple_xml_node_data_new(Eina_Simple_XML_Node_Tag *parent, const char *contents, size_t length);
/**
* Remove data from parent and delete it.
*
* @param node to release memory.
*/
EAPI void eina_simple_xml_node_data_free(Eina_Simple_XML_Node_Data *node);
/**
* Create new cdata. If parent is provided, it is automatically appended.
*
* @param parent if provided, will be set in the resulting structure
* as well as the cdata will be appended to children list.
* @param contents string to be used. Must not be NULL.
* @param length size in bytes of @a content.
*
* @return newly allocated memory or NULL on error. This memory should be
* released with eina_simple_xml_node_cdata_free() or indirectly
* with eina_simple_xml_node_tag_free() of the parent.
*/
EAPI Eina_Simple_XML_Node_CData * eina_simple_xml_node_cdata_new(Eina_Simple_XML_Node_Tag *parent, const char *contents, size_t length);
/**
* Remove cdata from parent and delete it.
*
* @param node to release memory.
*/
EAPI void eina_simple_xml_node_cdata_free(Eina_Simple_XML_Node_Data *node);
/**
* Create new processing. If parent is provided, it is automatically appended.
*
* @param parent if provided, will be set in the resulting structure
* as well as the processing will be appended to children list.
* @param contents string to be used. Must not be NULL.
* @param length size in bytes of @a contents.
*
* @return newly allocated memory or NULL on error. This memory should be
* released with eina_simple_xml_node_processing_free() or indirectly
* with eina_simple_xml_node_tag_free() of the parent.
*/
EAPI Eina_Simple_XML_Node_Processing * eina_simple_xml_node_processing_new(Eina_Simple_XML_Node_Tag *parent, const char *contents, size_t length);
/**
* Remove processing from parent and delete it.
*
* @param node processing to release memory.
*/
EAPI void eina_simple_xml_node_processing_free(Eina_Simple_XML_Node_Data *node);
/**
* Create new doctype. If parent is provided, it is automatically appended.
*
* @param parent if provided, will be set in the resulting structure
* as well as the doctype will be appended to children list.
* @param contents string to be used. Must not be NULL.
* @param length size in bytes of @a contents.
*
* @return newly allocated memory or NULL on error. This memory should be
* released with eina_simple_xml_node_doctype_free() or indirectly
* with eina_simple_xml_node_tag_free() of the parent.
*/
EAPI Eina_Simple_XML_Node_Doctype * eina_simple_xml_node_doctype_new(Eina_Simple_XML_Node_Tag *parent, const char *contents, size_t length);
/**
* Remove doctype from parent and delete it.
*
* @param node doctype to release memory.
*/
EAPI void eina_simple_xml_node_doctype_free(Eina_Simple_XML_Node_Data *node);
/**
* Create new comment. If parent is provided, it is automatically appended.
*
* @param parent if provided, will be set in the resulting structure
* as well as the comment will be appended to children list.
* @param contents string to be used. Must not be NULL.
* @param length size in bytes of @a contents.
*
* @return newly allocated memory or NULL on error. This memory should be
* released with eina_simple_xml_node_comment_free() or indirectly
* with eina_simple_xml_node_tag_free() of the parent.
*/
EAPI Eina_Simple_XML_Node_Comment * eina_simple_xml_node_comment_new(Eina_Simple_XML_Node_Tag *parent, const char *contents, size_t length);
/**
* Remove comment from parent and delete it.
*
* @param node comment to release memory.
*/
EAPI void eina_simple_xml_node_comment_free(Eina_Simple_XML_Node_Data *node);
/**
* Load a XML node tree based on the given string.
*
* @param buf the input string. May not contain \0 terminator.
* @param buflen the input string size.
* @param strip whenever this parser should strip leading and trailing
* whitespace.
*
* @return document root with children tags, or NULL on errors.
* Document with errors may return partial tree instead of NULL,
* we'll do our best to avoid returning nothing.
*/
EAPI Eina_Simple_XML_Node_Root * eina_simple_xml_node_load(const char *buf, unsigned buflen, Eina_Bool strip);
/**
* Free node tree build with eina_simple_xml_node_load()
*
* @param root memory returned by eina_simple_xml_node_load()
*/
EAPI void eina_simple_xml_node_root_free(Eina_Simple_XML_Node_Root *root);
/**
* Converts the node tree under the given element to a XML string.
*
* @param node the base node to convert.
* @param indent indentation string, or NULL to disable it.
*
* @return NULL on errors or a newly allocated string on success.
*/
EAPI char * eina_simple_xml_node_dump(Eina_Simple_XML_Node *node, const char *indent);
/**
* @}
*/
/**
* @}
*/
#endif /* EINA_SIMPLE_XML_H_ */
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