expat.cc File Reference

reading/writing xmlnodes from/to files, reading xmlnodes from strings More...

#include <jabberdlib.h>

Data Structures
struct	_expat_callback_data
Typedefs
typedef struct _expat_callback_data *	expat_callback_data
Functions
void	expat_startElement (void *userdata, const char *name, const char **atts)
void	expat_endElement (void *userdata, const char *name)
void	expat_charData (void *userdata, const char *s, int len)
xmlnode	xmlnode_str (const char *str, int len)
xmlnode	xmlnode_file (const char *file)
char const *	xmlnode_file_borked (char const *file)
int	xmlnode2file (char const *file, xmlnode node)
int	xmlnode2file_limited (char const *file, xmlnode node, size_t sizelimit)
void	xmlnode_put_expat_attribs (xmlnode owner, const char **atts, xmppd::ns_decl_list &nslist)

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Detailed Description

reading/writing xmlnodes from/to files, reading xmlnodes from strings

This file implements some tools for the xmlnode implementation in xmlnode.c

The name of this file is confusing. This file does not contain the expat implementation. It contains some code that uses expat to parse XML and build xmlnodes.

Note:

jabberd14's codebase up to jabberd 1.4.3 had included expat's source. Later versions dynamically link against expat and don't include the code anymore.

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Typedef Documentation

typedef struct _expat_callback_data * expat_callback_data

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Function Documentation

void expat_charData	(	void *	userdata,
		const char *	s,
		int	len
	)

callback function for CDATA nodes

This function will insert CDATA in an xmlnode

Parameters:

	userdata	pointer to the current xmlnode
	s	pointer to the CDATA string (not zero terminated!)
	len	length of the CDATA string

References _expat_callback_data::x, and xmlnode_insert_cdata().

Referenced by xmlnode_file(), and xmlnode_str().

void expat_endElement	(	void *	userdata,
		const char *	name
	)

callback function used for end elements

This function is used internally by expat.c as a callback function given to expat. It will complete an xmlnode and update the userdata pointer to point to the node that is parent of the next starting element.

Parameters:

	userdata	pointer to the current xmlnode
	name	name of the ending element (ignored by this function)

References _expat_callback_data::x, and xmlnode_get_parent().

Referenced by xmlnode_file(), and xmlnode_str().

void expat_startElement	(	void *	userdata,
		const char *	name,
		const char **	atts
	)

callback function used for start elements

This function is used internally by expat.c as a callback function given to expat. It will create a new xmlnode and add it to the already created xmlnode tree.

Parameters:

	userdata	pointer to the parent xmlnode instance (NULL if this function is called for the root note)
	name	name of the starting element
	atts	attributes that are contained in the start element

References xmppd::ns_decl_list::get_nsprefix(), j_strcmp(), _expat_callback_data::ns, NS_DIALBACK, NS_STREAM, _expat_callback_data::parse_pool, pstrdup(), _expat_callback_data::x, xmlnode_insert_tag_ns(), xmlnode_new_tag_ns(), xmlnode_put_expat_attribs(), and XMLNS_SEPARATOR.

Referenced by xmlnode_file(), and xmlnode_str().

int xmlnode2file	(	char const *	file,
		xmlnode	node
	)

write an xmlnode to a file (without a size limit)

Parameters:

	file	the target file
	node	the xmlnode that should be written

Returns:

1 on success, -1 on failure

References xmlnode2file_limited().

Referenced by jsm_serialize(), and main().

int xmlnode2file_limited	(	char const *	file,
		xmlnode	node,
		size_t	sizelimit
	)

write an xmlnode to a file, limited by size

Parameters:

	file	the target file
	node	the xmlnode that should be written
	sizelimit	the maximum length of the file to be written

Returns:

1 on success, 0 if failed due to size limit, -1 on failure

References j_strlen(), and xmlnode_serialize_string().

Referenced by xdb_file_phandler(), and xmlnode2file().

xmlnode xmlnode_file

(

const char *

file

)

create an xmlnode instance (possibly including other xmlnode instances) by parsing a file

This function will parse a file containing an XML document and create an xmlnode graph

Parameters:

file

the filename

Returns:

the graph of xmlnodes that represent the parsed document, NULL on failure

References expat_charData(), expat_endElement(), expat_startElement(), _expat_callback_data::ns, _expat_callback_data::parse_pool, pool_free(), pool_new, _expat_callback_data::x, xmlnode_free(), and XMLNS_SEPARATOR.

Referenced by configurate(), jsm_deserialize(), main(), and xdb_file_load().

char const* xmlnode_file_borked

(

char const *

file

)

get message why parsing of a file failed

This function can be used to get a textual message why parsing an XML file failed.

Parameters:

file

the filename

Returns:

pointer to a message why parsing failed, NULL if parsing did not fail

References XMLNS_SEPARATOR.

Referenced by configurate(), and main().

void xmlnode_put_expat_attribs	(	xmlnode	owner,
		const char **	atts,
		xmppd::ns_decl_list &	nslist
	)

append attributes in the expat format to an existing xmlnode

Parameters:

	owner	where to add the attributes
	atts	the attributes in expat format (even indexes are the attribute names, odd indexes the values)
	nslist	list of currently defined prefixes for namespace IRIs

References xmppd::ns_decl_list::get_nsprefix(), j_strcmp(), NS_DIALBACK, NS_STREAM, pstrdup(), xmlnode_pool(), xmlnode_put_attrib_ns(), and XMLNS_SEPARATOR.

Referenced by expat_startElement().

xmlnode xmlnode_str	(	const char *	str,
		int	len
	)

create an xmlnode instance (possibly including other xmlnode instances) by parsing a string

This function will parse a string containing an XML document and create an xmlnode graph

Parameters:

	str	the string containing the XML document (not necessarily zero terminated)
	len	the length of the string (without the zero byte, if present)

Returns:

the graph of xmlnodes that represent the parsed document, NULL on failure

References expat_charData(), expat_endElement(), expat_startElement(), _expat_callback_data::ns, _expat_callback_data::parse_pool, pool_free(), pool_new, _expat_callback_data::x, xmlnode_free(), and XMLNS_SEPARATOR.

Referenced by main(), and xdb_file_phandler().