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().

For more information, see this example.

Functions
Eina_Bool	eina_simple_xml_parse (const char buf, unsigned buflen, Eina_Bool strip, Eina_Simple_XML_Cb func, const void data)
	Parses a section of XML string text.
const char *	eina_simple_xml_tag_attributes_find (const char *buf, unsigned buflen)
	Given the contents of a tag, find where the attributes start.
Eina_Bool	eina_simple_xml_attributes_parse (const char buf, unsigned buflen, Eina_Simple_XML_Attribute_Cb func, const void data)
	Given a buffer with xml attributes, parse them to key=value pairs.
Eina_Bool	eina_simple_xml_attribute_w3c_parse (const char buf, Eina_Simple_XML_Attribute_Cb func, const void data)
	Given a buffer with the xml value of an attributes, parse them to key:value pairs.
Eina_Simple_XML_Attribute *	eina_simple_xml_attribute_new (Eina_Simple_XML_Node_Tag parent, const char key, const char *value)
	Creates (and appends) new attribute to tag.
void	eina_simple_xml_attribute_free (Eina_Simple_XML_Attribute *attr)
	Removes attribute from parent and delete it.
Eina_Simple_XML_Node_Tag *	eina_simple_xml_node_tag_new (Eina_Simple_XML_Node_Tag parent, const char name)
	Creates new tag. If parent is provided, it is automatically appended.
void	eina_simple_xml_node_tag_free (Eina_Simple_XML_Node_Tag *tag)
	Removes tag from parent and delete it.
Eina_Simple_XML_Node_Data *	eina_simple_xml_node_data_new (Eina_Simple_XML_Node_Tag parent, const char contents, size_t length)
	Creates new data. If parent is provided, it is automatically appended.
void	eina_simple_xml_node_data_free (Eina_Simple_XML_Node_Data *node)
	Removes data from parent and delete it.
Eina_Simple_XML_Node_CData *	eina_simple_xml_node_cdata_new (Eina_Simple_XML_Node_Tag parent, const char contents, size_t length)
	Creates new cdata. If parent is provided, it is automatically appended.
void	eina_simple_xml_node_cdata_free (Eina_Simple_XML_Node_Data *node)
	Removes cdata from parent and delete it.
Eina_Simple_XML_Node_Doctype_Child *	eina_simple_xml_node_doctype_child_new (Eina_Simple_XML_Node_Tag parent, const char contents, size_t length)
	Creates new doctype child. If parent is provided, it is automatically appended.
void	eina_simple_xml_node_doctype_child_free (Eina_Simple_XML_Node_Data *node)
	Removes doctype child from parent and delete it.
Eina_Simple_XML_Node_Processing *	eina_simple_xml_node_processing_new (Eina_Simple_XML_Node_Tag parent, const char contents, size_t length)
	Creates new processing. If parent is provided, it is automatically appended.
void	eina_simple_xml_node_processing_free (Eina_Simple_XML_Node_Data *node)
	Removes processing from parent and delete it.
Eina_Simple_XML_Node_Doctype *	eina_simple_xml_node_doctype_new (Eina_Simple_XML_Node_Tag parent, const char contents, size_t length)
	Creates new doctype. If parent is provided, it is automatically appended.
void	eina_simple_xml_node_doctype_free (Eina_Simple_XML_Node_Data *node)
	Removes doctype from parent and delete it.
Eina_Simple_XML_Node_Comment *	eina_simple_xml_node_comment_new (Eina_Simple_XML_Node_Tag parent, const char contents, size_t length)
	Creates new comment. If parent is provided, it is automatically appended.
void	eina_simple_xml_node_comment_free (Eina_Simple_XML_Node_Data *node)
	Removes comment from parent and delete it.
Eina_Simple_XML_Node_Root *	eina_simple_xml_node_load (const char *buf, unsigned buflen, Eina_Bool strip)
	Loads a XML node tree based on the given string.
void	eina_simple_xml_node_root_free (Eina_Simple_XML_Node_Root *root)
	Frees node tree build with eina_simple_xml_node_load()
char *	eina_simple_xml_node_dump (Eina_Simple_XML_Node node, const char indent)
	Converts the node tree under the given element to a XML string.
Typedefs
typedef struct _Eina_Simple_XML_Node_Data	Eina_Simple_XML_Node_Doctype_Child

Typedef Documentation

typedef struct _Eina_Simple_XML_Node_Data Eina_Simple_XML_Node_Doctype_Child

Since (EFL) :: 1.8

Enumeration Type Documentation

enum _Eina_Simple_XML_Node_Type

Enumerator:

EINA_SIMPLE_XML_NODE_DOCTYPE_CHILD

Since (EFL) :: 1.8

enum _Eina_Simple_XML_Type

a simple XML type.

Enumerator:

EINA_SIMPLE_XML_OPEN	<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_DOCTYPE_CHILD	<!DOCTYPE_CHILD Since (EFL) : 1.8

Function Documentation

void eina_simple_xml_attribute_free ( Eina_Simple_XML_Attribute * attr )

Removes attribute from parent and delete it.

Parameters:

attr	attribute to release memory.

Since :: 2.3

Eina_Simple_XML_Attribute* eina_simple_xml_attribute_new	(	Eina_Simple_XML_Node_Tag *	parent,
		const char *	key,
		const char *	value
	)

Creates (and appends) new attribute to tag.

Parameters:

parent	If provided, will be set in the resulting structure as well as the attribute will be appended to attributes list.
key	Null-terminated string. Must not be `NULL`.
value	Null-terminated string. If `NULL`, the empty string will be used.

Returns:: 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().

Since :: 2.3

Eina_Bool eina_simple_xml_attribute_w3c_parse	(	const char *	buf,
		Eina_Simple_XML_Attribute_Cb	func,
		const void *	data
	)

Given a buffer with the xml value of an attributes, parse them to key:value pairs.

Parameters:

buf	the input string. Need to contain \0 terminator.
func	what to call back while parse to do some action. The first parameter is the given user 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.
data	data to pass to the callback function.

Returns:: EINA_TRUE on success or EINA_FALSE if it was aborted by user or parsing error.

Since (EFL) :: 1.14

Since :: 3.0

Eina_Bool eina_simple_xml_attributes_parse	(	const char *	buf,
		unsigned	buflen,
		Eina_Simple_XML_Attribute_Cb	func,
		const void *	data
	)

Given a buffer with xml attributes, parse them to key=value pairs.

Parameters:

buf	The input string. May not contain \0 terminator.
buflen	The input string size.
func	What to call back while parse to do some action. The first parameter is the given user 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.
data	Data to pass to the callback function.

Returns:: EINA_TRUE on success, or EINA_FALSE if it was aborted by user or parsing error.

Since :: 2.3

Examples:: eina_simple_xml_parser_01.c.

void eina_simple_xml_node_cdata_free ( Eina_Simple_XML_Node_Data * node )

Removes cdata from parent and delete it.

Parameters:

node	to release memory.

Since :: 2.3

Eina_Simple_XML_Node_CData* eina_simple_xml_node_cdata_new	(	Eina_Simple_XML_Node_Tag *	parent,
		const char *	contents,
		size_t	length
	)

Creates new cdata. If parent is provided, it is automatically appended.

Parameters:

parent	If provided, will be set in the resulting structure as well as the cdata will be appended to children list.
contents	String to be used. Must not be `NULL`.
length	Size in bytes of content.

Returns:: 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.

Since :: 2.3

void eina_simple_xml_node_comment_free ( Eina_Simple_XML_Node_Data * node )

Removes comment from parent and delete it.

Parameters:

node	comment to release memory.

Since :: 2.3

Eina_Simple_XML_Node_Comment* eina_simple_xml_node_comment_new	(	Eina_Simple_XML_Node_Tag *	parent,
		const char *	contents,
		size_t	length
	)

Creates new comment. If parent is provided, it is automatically appended.

Parameters:

parent	If provided, will be set in the resulting structure as well as the comment will be appended to children list.
contents	String to be used. Must not be `NULL`.
length	Size in bytes of contents.

Returns:: 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.

Since :: 2.3

void eina_simple_xml_node_data_free ( Eina_Simple_XML_Node_Data * node )

Removes data from parent and delete it.

Parameters:

node	to release memory.

Since :: 2.3

Eina_Simple_XML_Node_Data* eina_simple_xml_node_data_new	(	Eina_Simple_XML_Node_Tag *	parent,
		const char *	contents,
		size_t	length
	)

Creates new data. If parent is provided, it is automatically appended.

Parameters:

parent	If provided, will be set in the resulting structure as well as the data will be appended to children list.
contents	String to be used. Must not be `NULL`.
length	Size in bytes of contents.

Returns:: 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.

Since :: 2.3

void eina_simple_xml_node_doctype_child_free ( Eina_Simple_XML_Node_Data * node )

Removes doctype child from parent and delete it.

Parameters:

node	to release memory.

Since (EFL) :: 1.8

Since :: 2.3

Eina_Simple_XML_Node_Doctype_Child* eina_simple_xml_node_doctype_child_new	(	Eina_Simple_XML_Node_Tag *	parent,
		const char *	contents,
		size_t	length
	)

Creates new doctype child. If parent is provided, it is automatically appended.

Parameters:

parent	If provided, will be set in the resulting structure as well as the doctype child will be appended to children list.
contents	String to be used. Must not be `NULL`.
length	size in bytes of content.

Returns:: Newly allocated memory or NULL on error. This memory should be released with eina_simple_xml_node_doctype_child_free() or indirectly with eina_simple_xml_node_tag_free() of the parent.

Since (EFL) :: 1.8

Since :: 2.3

void eina_simple_xml_node_doctype_free ( Eina_Simple_XML_Node_Data * node )

Removes doctype from parent and delete it.

Parameters:

node	doctype to release memory.

Since :: 2.3

Eina_Simple_XML_Node_Doctype* eina_simple_xml_node_doctype_new	(	Eina_Simple_XML_Node_Tag *	parent,
		const char *	contents,
		size_t	length
	)

Creates new doctype. If parent is provided, it is automatically appended.

Parameters:

parent	If provided, will be set in the resulting structure as well as the doctype will be appended to children list.
contents	String to be used. Must not be `NULL`.
length	Size in bytes of contents.

Returns:: 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.

Since :: 2.3

char* eina_simple_xml_node_dump	(	Eina_Simple_XML_Node *	node,
		const char *	indent
	)

Converts the node tree under the given element to a XML string.

Parameters:

node	The base node to convert.
indent	Indentation string, or `NULL` to disable it.

Returns:: NULL on errors, or a newly allocated string on success.

Since :: 2.3

Eina_Simple_XML_Node_Root* eina_simple_xml_node_load	(	const char *	buf,
		unsigned	buflen,
		Eina_Bool	strip
	)

Loads a XML node tree based on the given string.

Parameters:

buf	The input string. May not contain \0 terminator.
buflen	The input string size.
strip	Whenever this parser should strip leading and trailing whitespace.

Returns:: 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.

Since :: 2.3

void eina_simple_xml_node_processing_free ( Eina_Simple_XML_Node_Data * node )

Removes processing from parent and delete it.

Parameters:

node	processing to release memory.

Since :: 2.3

Eina_Simple_XML_Node_Processing* eina_simple_xml_node_processing_new	(	Eina_Simple_XML_Node_Tag *	parent,
		const char *	contents,
		size_t	length
	)

Creates new processing. If parent is provided, it is automatically appended.

Parameters:

parent	If provided, will be set in the resulting structure as well as the processing will be appended to children list.
contents	String to be used. Must not be `NULL`.
length	Size in bytes of contents.

Returns:: 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.

Since :: 2.3

void eina_simple_xml_node_root_free ( Eina_Simple_XML_Node_Root * root )

Frees node tree build with eina_simple_xml_node_load()

Parameters:

root	Memory returned by eina_simple_xml_node_load()

Since :: 2.3

void eina_simple_xml_node_tag_free ( Eina_Simple_XML_Node_Tag * tag )

Removes tag from parent and delete it.

Parameters:

tag	to release memory.

Since :: 2.3

Eina_Simple_XML_Node_Tag* eina_simple_xml_node_tag_new	(	Eina_Simple_XML_Node_Tag *	parent,
		const char *	name
	)

Creates new tag. If parent is provided, it is automatically appended.

Parameters:

parent	If provided, will be set in the resulting structure as well as the tag will be appended to children list.
name	Null-terminated string. Must not be `NULL`.

Returns:: 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.

Since :: 2.3

Eina_Bool eina_simple_xml_parse	(	const char *	buf,
		unsigned	buflen,
		Eina_Bool	strip,
		Eina_Simple_XML_Cb	func,
		const void *	data
	)

Parses a section of XML string text.

Parameters:

buf	The input string. May not contain \0 terminator.
buflen	The input string size.
strip	Whenever this parser should strip leading and trailing whitespace. These whitespace will still be issued, but as type EINA_SIMPLE_XML_IGNORED.
func	What to call back while parse to do some action. The first parameter is the given user 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 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.
data	What to give as context to func.

Returns:: EINA_TRUE on success, or EINA_FALSE if it was aborted by user or parsing error.

Since :: 2.3

Examples:: eina_simple_xml_parser_01.c.

const char* eina_simple_xml_tag_attributes_find	(	const char *	buf,
		unsigned	buflen
	)

Given the contents of a tag, find where the attributes start.

Parameters:

buf	The input string. May not contain \0 terminator.
buflen	The input string size.

Returns:: 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.

Since :: 2.3

Examples:: eina_simple_xml_parser_01.c.

Functions

Typedefs

Typedef Documentation

Enumeration Type Documentation

Function Documentation