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Module xmlIO from libxml2

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interface for the I/O interfaces used by the parser

Table of Contents

xmlOutputBufferPtr	xmlAllocOutputBuffer	(xmlCharEncodingHandlerPtr encoder)
xmlParserInputBufferPtr	xmlAllocParserInputBuffer	(xmlCharEncoding enc)
int	xmlCheckFilename		(const char * path)
xmlParserInputPtr	xmlCheckHTTPInput	(xmlParserCtxtPtr ctxt, 
						 xmlParserInputPtr ret)
void	xmlCleanupInputCallbacks	(void)
void	xmlCleanupOutputCallbacks	(void)
int	xmlFileClose			(void * context)
int	xmlFileMatch			(const char * filename)
void *	xmlFileOpen			(const char * filename)
int	xmlFileRead			(void * context, 
					 char * buffer, 
					 int len)
void	xmlFreeParserInputBuffer	(xmlParserInputBufferPtr in)
int	xmlIOFTPClose			(void * context)
int	xmlIOFTPMatch			(const char * filename)
void *	xmlIOFTPOpen			(const char * filename)
int	xmlIOFTPRead			(void * context, 
					 char * buffer, 
					 int len)
int	xmlIOHTTPClose			(void * context)
int	xmlIOHTTPMatch			(const char * filename)
void *	xmlIOHTTPOpen			(const char * filename)
void *	xmlIOHTTPOpenW			(const char * post_uri, 
					 int compression)
int	xmlIOHTTPRead			(void * context, 
					 char * buffer, 
					 int len)
Function type: xmlInputCloseCallback
int	xmlInputCloseCallback		(void * context)

Function type: xmlInputMatchCallback
int	xmlInputMatchCallback		(char const * filename)

Function type: xmlInputOpenCallback
void *	xmlInputOpenCallback		(char const * filename)

Function type: xmlInputReadCallback
int	xmlInputReadCallback		(void * context, 
					 char * buffer, 
					 int len)

xmlParserInputPtr	xmlNoNetExternalEntityLoader	(const char * URL, 
							 const char * ID, 
							 xmlParserCtxtPtr ctxt)
xmlChar *	xmlNormalizeWindowsPath	(const xmlChar * path)
int	xmlOutputBufferClose		(xmlOutputBufferPtr out)
xmlOutputBufferPtr	xmlOutputBufferCreateBuffer	(xmlBufferPtr buffer, 
							 xmlCharEncodingHandlerPtr encoder)
xmlOutputBufferPtr	xmlOutputBufferCreateFd	(int fd, 
						 xmlCharEncodingHandlerPtr encoder)
xmlOutputBufferPtr	xmlOutputBufferCreateFile	(FILE * file, 
							 xmlCharEncodingHandlerPtr encoder)
xmlOutputBufferPtr	xmlOutputBufferCreateFilename	(const char * URI, 
							 xmlCharEncodingHandlerPtr encoder, 
							 int compression)
xmlOutputBufferPtr	xmlOutputBufferCreateIO	(xmlOutputWriteCallback iowrite, 
						 xmlOutputCloseCallback ioclose, 
						 void * ioctx, 
						 xmlCharEncodingHandlerPtr encoder)
int	xmlOutputBufferFlush		(xmlOutputBufferPtr out)
const xmlChar *	xmlOutputBufferGetContent	(xmlOutputBufferPtr out)
size_t	xmlOutputBufferGetSize		(xmlOutputBufferPtr out)
int	xmlOutputBufferWrite		(xmlOutputBufferPtr out, 
					 int len, 
					 const char * buf)
int	xmlOutputBufferWriteEscape	(xmlOutputBufferPtr out, 
					 const xmlChar * str, 
					 xmlCharEncodingOutputFunc escaping)
int	xmlOutputBufferWriteString	(xmlOutputBufferPtr out, 
					 const char * str)
Function type: xmlOutputCloseCallback
int	xmlOutputCloseCallback		(void * context)

Function type: xmlOutputMatchCallback
int	xmlOutputMatchCallback		(char const * filename)

Function type: xmlOutputOpenCallback
void *	xmlOutputOpenCallback		(char const * filename)

Function type: xmlOutputWriteCallback
int	xmlOutputWriteCallback		(void * context, 
					 const char * buffer, 
					 int len)

char *	xmlParserGetDirectory		(const char * filename)
xmlParserInputBufferPtr	xmlParserInputBufferCreateFd	(int fd, 
							 xmlCharEncoding enc)
xmlParserInputBufferPtr	xmlParserInputBufferCreateFile	(FILE * file, 
							 xmlCharEncoding enc)
xmlParserInputBufferPtr	xmlParserInputBufferCreateFilename	(const char * URI, 
							 xmlCharEncoding enc)
xmlParserInputBufferPtr	xmlParserInputBufferCreateIO	(xmlInputReadCallback ioread, 
							 xmlInputCloseCallback ioclose, 
							 void * ioctx, 
							 xmlCharEncoding enc)
xmlParserInputBufferPtr	xmlParserInputBufferCreateMem	(const char * mem, 
							 int size, 
							 xmlCharEncoding enc)
xmlParserInputBufferPtr	xmlParserInputBufferCreateStatic	(const char * mem, 
							 int size, 
							 xmlCharEncoding enc)
int	xmlParserInputBufferGrow	(xmlParserInputBufferPtr in, 
					 int len)
int	xmlParserInputBufferPush	(xmlParserInputBufferPtr in, 
					 int len, 
					 const char * buf)
int	xmlParserInputBufferRead	(xmlParserInputBufferPtr in, 
					 int len)
int	xmlPopInputCallbacks		(void)
void	xmlRegisterDefaultInputCallbacks	(void)
void	xmlRegisterDefaultOutputCallbacks	(void)
void	xmlRegisterHTTPPostCallbacks	(void)
int	xmlRegisterInputCallbacks	(xmlInputMatchCallback matchFunc, 
					 xmlInputOpenCallback openFunc, 
					 xmlInputReadCallback readFunc, 
					 xmlInputCloseCallback closeFunc)
int	xmlRegisterOutputCallbacks	(xmlOutputMatchCallback matchFunc, 
					 xmlOutputOpenCallback openFunc, 
					 xmlOutputWriteCallback writeFunc, 
					 xmlOutputCloseCallback closeFunc)

Description

Function: xmlAllocOutputBuffer

xmlOutputBufferPtr	xmlAllocOutputBuffer	(xmlCharEncodingHandlerPtr encoder)

Create a buffered parser output

encoder:the encoding converter or NULL
Returns:the new parser output or NULL

Function: xmlAllocParserInputBuffer

xmlParserInputBufferPtr	xmlAllocParserInputBuffer	(xmlCharEncoding enc)

Create a buffered parser input for progressive parsing

enc:the charset encoding if known
Returns:the new parser input or NULL

Function: xmlCheckFilename

int	xmlCheckFilename		(const char * path)

function checks to see if @path is a valid source (file, socket...) for XML. if stat is not available on the target machine,

path:the path to check
Returns:1. if stat fails, returns 0 (if calling stat on the filename fails, it can't be right). if stat succeeds and the file is a directory, returns 2. otherwise returns 1.

Function: xmlCheckHTTPInput

xmlParserInputPtr	xmlCheckHTTPInput	(xmlParserCtxtPtr ctxt, 
						 xmlParserInputPtr ret)

Check an input in case it was created from an HTTP stream, in that case it will handle encoding and update of the base URL in case of redirection. It also checks for HTTP errors in which case the input is cleanly freed up and an appropriate error is raised in context

ctxt:an XML parser context
ret:an XML parser input
Returns:the input or NULL in case of HTTP error.

Function: xmlCleanupInputCallbacks

void	xmlCleanupInputCallbacks	(void)

clears the entire input callback table. this includes the compiled-in I/O.

Function: xmlCleanupOutputCallbacks

void	xmlCleanupOutputCallbacks	(void)

clears the entire output callback table. this includes the compiled-in I/O callbacks.

Function: xmlFileClose

int	xmlFileClose			(void * context)

Close an I/O channel

context:the I/O context
Returns:0 or -1 in case of error

Function: xmlFileMatch

int	xmlFileMatch			(const char * filename)

input from FILE *

filename:the URI for matching
Returns:1 if matches, 0 otherwise

Function: xmlFileOpen

void *	xmlFileOpen			(const char * filename)

Wrapper around xmlFileOpen_real that try it with an unescaped version of @filename, if this fails fallback to @filename

filename:the URI for matching
Returns:a handler or NULL in case or failure

Function: xmlFileRead

int	xmlFileRead			(void * context, 
					 char * buffer, 
					 int len)

Read @len bytes to @buffer from the I/O channel.

context:the I/O context
buffer:where to drop data
len:number of bytes to write
Returns:the number of bytes written or < 0 in case of failure

Function: xmlFreeParserInputBuffer

void	xmlFreeParserInputBuffer	(xmlParserInputBufferPtr in)

Free up the memory used by a buffered parser input

in:a buffered parser input

Function: xmlIOFTPClose

int	xmlIOFTPClose			(void * context)

Close an FTP I/O channel

context:the I/O context
Returns:0

Function: xmlIOFTPMatch

int	xmlIOFTPMatch			(const char * filename)

check if the URI matches an FTP one

filename:the URI for matching
Returns:1 if matches, 0 otherwise

Function: xmlIOFTPOpen

void *	xmlIOFTPOpen			(const char * filename)

open an FTP I/O channel

filename:the URI for matching
Returns:an I/O context or NULL in case of error

Function: xmlIOFTPRead

int	xmlIOFTPRead			(void * context, 
					 char * buffer, 
					 int len)

Read @len bytes to @buffer from the I/O channel.

context:the I/O context
buffer:where to drop data
len:number of bytes to write
Returns:the number of bytes written

Function: xmlIOHTTPClose

int	xmlIOHTTPClose			(void * context)

Close an HTTP I/O channel

context:the I/O context
Returns:0

Function: xmlIOHTTPMatch

int	xmlIOHTTPMatch			(const char * filename)

check if the URI matches an HTTP one

filename:the URI for matching
Returns:1 if matches, 0 otherwise

Function: xmlIOHTTPOpen

void *	xmlIOHTTPOpen			(const char * filename)

open an HTTP I/O channel

filename:the URI for matching
Returns:an I/O context or NULL in case of error

Function: xmlIOHTTPOpenW

void *	xmlIOHTTPOpenW			(const char * post_uri, 
					 int compression)

Open a temporary buffer to collect the document for a subsequent HTTP POST request. Non-static as is called from the output buffer creation routine.

post_uri:The destination URI for the document
compression:The compression desired for the document.
Returns:an I/O context or NULL in case of error.

Function: xmlIOHTTPRead

int	xmlIOHTTPRead			(void * context, 
					 char * buffer, 
					 int len)

Read @len bytes to @buffer from the I/O channel.

context:the I/O context
buffer:where to drop data
len:number of bytes to write
Returns:the number of bytes written

Function type: xmlInputCloseCallback

Function type: xmlInputCloseCallback
int	xmlInputCloseCallback		(void * context)

Callback used in the I/O Input API to close the resource

context:an Input context
Returns:0 or -1 in case of error

Function type: xmlInputMatchCallback

Function type: xmlInputMatchCallback
int	xmlInputMatchCallback		(char const * filename)

Callback used in the I/O Input API to detect if the current handler can provide input fonctionnalities for this resource.

filename:the filename or URI
Returns:1 if yes and 0 if another Input module should be used

Function type: xmlInputOpenCallback

Function type: xmlInputOpenCallback
void *	xmlInputOpenCallback		(char const * filename)

Callback used in the I/O Input API to open the resource

filename:the filename or URI
Returns:an Input context or NULL in case or error

Function type: xmlInputReadCallback

Function type: xmlInputReadCallback
int	xmlInputReadCallback		(void * context, 
					 char * buffer, 
					 int len)

Callback used in the I/O Input API to read the resource

context:an Input context
buffer:the buffer to store data read
len:the length of the buffer in bytes
Returns:the number of bytes read or -1 in case of error

Function: xmlNoNetExternalEntityLoader

xmlParserInputPtr	xmlNoNetExternalEntityLoader	(const char * URL, 
							 const char * ID, 
							 xmlParserCtxtPtr ctxt)

A specific entity loader disabling network accesses, though still allowing local catalog accesses for resolution.

URL:the URL for the entity to load
ID:the System ID for the entity to load
ctxt:the context in which the entity is called or NULL
Returns:a new allocated xmlParserInputPtr, or NULL.

Function: xmlNormalizeWindowsPath

xmlChar *	xmlNormalizeWindowsPath	(const xmlChar * path)

This function is obsolete. Please see xmlURIFromPath in uri.c for a better solution.

path:the input file path
Returns:a canonicalized version of the path

Function: xmlOutputBufferClose

int	xmlOutputBufferClose		(xmlOutputBufferPtr out)

flushes and close the output I/O channel and free up all the associated resources

out:a buffered output
Returns:the number of byte written or -1 in case of error.

Function: xmlOutputBufferCreateBuffer

xmlOutputBufferPtr	xmlOutputBufferCreateBuffer	(xmlBufferPtr buffer, 
							 xmlCharEncodingHandlerPtr encoder)

Create a buffered output for the progressive saving to a xmlBuffer

buffer:a xmlBufferPtr
encoder:the encoding converter or NULL
Returns:the new parser output or NULL

Function: xmlOutputBufferCreateFd

xmlOutputBufferPtr	xmlOutputBufferCreateFd	(int fd, 
						 xmlCharEncodingHandlerPtr encoder)

Create a buffered output for the progressive saving to a file descriptor

fd:a file descriptor number
encoder:the encoding converter or NULL
Returns:the new parser output or NULL

Function: xmlOutputBufferCreateFile

xmlOutputBufferPtr	xmlOutputBufferCreateFile	(FILE * file, 
							 xmlCharEncodingHandlerPtr encoder)

Create a buffered output for the progressive saving to a FILE * buffered C I/O

file:a FILE*
encoder:the encoding converter or NULL
Returns:the new parser output or NULL

Function: xmlOutputBufferCreateFilename

xmlOutputBufferPtr	xmlOutputBufferCreateFilename	(const char * URI, 
							 xmlCharEncodingHandlerPtr encoder, 
							 int compression)

Create a buffered output for the progressive saving of a file If filename is "-' then we use stdout as the output. Automatic support for ZLIB/Compress compressed document is provided by default if found at compile-time. TODO: currently if compression is set, the library only support writing to a local file.

URI:a C string containing the URI or filename
encoder:the encoding converter or NULL
compression:the compression ration (0 none, 9 max).
Returns:the new output or NULL

Function: xmlOutputBufferCreateIO

xmlOutputBufferPtr	xmlOutputBufferCreateIO	(xmlOutputWriteCallback iowrite, 
						 xmlOutputCloseCallback ioclose, 
						 void * ioctx, 
						 xmlCharEncodingHandlerPtr encoder)

Create a buffered output for the progressive saving to an I/O handler

iowrite:an I/O write function
ioclose:an I/O close function
ioctx:an I/O handler
encoder:the charset encoding if known
Returns:the new parser output or NULL

Function: xmlOutputBufferFlush

int	xmlOutputBufferFlush		(xmlOutputBufferPtr out)

flushes the output I/O channel

out:a buffered output
Returns:the number of byte written or -1 in case of error.

Function: xmlOutputBufferGetContent

const xmlChar *	xmlOutputBufferGetContent	(xmlOutputBufferPtr out)

Gives a pointer to the data currently held in the output buffer

out:an xmlOutputBufferPtr
Returns:a pointer to the data or NULL in case of error

Function: xmlOutputBufferGetSize

size_t	xmlOutputBufferGetSize		(xmlOutputBufferPtr out)

Gives the length of the data currently held in the output buffer

out:an xmlOutputBufferPtr
Returns:0 in case or error or no data is held, the size otherwise

Function: xmlOutputBufferWrite

int	xmlOutputBufferWrite		(xmlOutputBufferPtr out, 
					 int len, 
					 const char * buf)

Write the content of the array in the output I/O buffer This routine handle the I18N transcoding from internal UTF-8 The buffer is lossless, i.e. will store in case of partial or delayed writes.

out:a buffered parser output
len:the size in bytes of the array.
buf:an char array
Returns:the number of chars immediately written, or -1 in case of error.

Function: xmlOutputBufferWriteEscape

int	xmlOutputBufferWriteEscape	(xmlOutputBufferPtr out, 
					 const xmlChar * str, 
					 xmlCharEncodingOutputFunc escaping)

Write the content of the string in the output I/O buffer This routine escapes the caracters and then handle the I18N transcoding from internal UTF-8 The buffer is lossless, i.e. will store in case of partial or delayed writes.

out:a buffered parser output
str:a zero terminated UTF-8 string
escaping:an optional escaping function (or NULL)
Returns:the number of chars immediately written, or -1 in case of error.

Function: xmlOutputBufferWriteString

int	xmlOutputBufferWriteString	(xmlOutputBufferPtr out, 
					 const char * str)

Write the content of the string in the output I/O buffer This routine handle the I18N transcoding from internal UTF-8 The buffer is lossless, i.e. will store in case of partial or delayed writes.

out:a buffered parser output
str:a zero terminated C string
Returns:the number of chars immediately written, or -1 in case of error.

Function type: xmlOutputCloseCallback

Function type: xmlOutputCloseCallback
int	xmlOutputCloseCallback		(void * context)

Callback used in the I/O Output API to close the resource

context:an Output context
Returns:0 or -1 in case of error

Function type: xmlOutputMatchCallback

Function type: xmlOutputMatchCallback
int	xmlOutputMatchCallback		(char const * filename)

Callback used in the I/O Output API to detect if the current handler can provide output fonctionnalities for this resource.

filename:the filename or URI
Returns:1 if yes and 0 if another Output module should be used

Function type: xmlOutputOpenCallback

Function type: xmlOutputOpenCallback
void *	xmlOutputOpenCallback		(char const * filename)

Callback used in the I/O Output API to open the resource

filename:the filename or URI
Returns:an Output context or NULL in case or error

Function type: xmlOutputWriteCallback

Function type: xmlOutputWriteCallback
int	xmlOutputWriteCallback		(void * context, 
					 const char * buffer, 
					 int len)

Callback used in the I/O Output API to write to the resource

context:an Output context
buffer:the buffer of data to write
len:the length of the buffer in bytes
Returns:the number of bytes written or -1 in case of error

Function: xmlParserGetDirectory

char *	xmlParserGetDirectory		(const char * filename)

lookup the directory for that file

filename:the path to a file
Returns:a new allocated string containing the directory, or NULL.

Function: xmlParserInputBufferCreateFd

xmlParserInputBufferPtr	xmlParserInputBufferCreateFd	(int fd, 
							 xmlCharEncoding enc)

Create a buffered parser input for the progressive parsing for the input from a file descriptor

fd:a file descriptor number
enc:the charset encoding if known
Returns:the new parser input or NULL

Function: xmlParserInputBufferCreateFile

xmlParserInputBufferPtr	xmlParserInputBufferCreateFile	(FILE * file, 
							 xmlCharEncoding enc)

Create a buffered parser input for the progressive parsing of a FILE * buffered C I/O

file:a FILE*
enc:the charset encoding if known
Returns:the new parser input or NULL

Function: xmlParserInputBufferCreateFilename

xmlParserInputBufferPtr	xmlParserInputBufferCreateFilename	(const char * URI, 
							 xmlCharEncoding enc)

Create a buffered parser input for the progressive parsing of a file If filename is "-' then we use stdin as the input. Automatic support for ZLIB/Compress compressed document is provided by default if found at compile-time. Do an encoding check if enc == XML_CHAR_ENCODING_NONE

URI:a C string containing the URI or filename
enc:the charset encoding if known
Returns:the new parser input or NULL

Function: xmlParserInputBufferCreateIO

xmlParserInputBufferPtr	xmlParserInputBufferCreateIO	(xmlInputReadCallback ioread, 
							 xmlInputCloseCallback ioclose, 
							 void * ioctx, 
							 xmlCharEncoding enc)

Create a buffered parser input for the progressive parsing for the input from an I/O handler

ioread:an I/O read function
ioclose:an I/O close function
ioctx:an I/O handler
enc:the charset encoding if known
Returns:the new parser input or NULL

Function: xmlParserInputBufferCreateMem

xmlParserInputBufferPtr	xmlParserInputBufferCreateMem	(const char * mem, 
							 int size, 
							 xmlCharEncoding enc)

Create a buffered parser input for the progressive parsing for the input from a memory area.

mem:the memory input
size:the length of the memory block
enc:the charset encoding if known
Returns:the new parser input or NULL

Function: xmlParserInputBufferCreateStatic

xmlParserInputBufferPtr	xmlParserInputBufferCreateStatic	(const char * mem, 
							 int size, 
							 xmlCharEncoding enc)

Create a buffered parser input for the progressive parsing for the input from an immutable memory area. This will not copy the memory area to the buffer, but the memory is expected to be available until the end of the parsing, this is useful for example when using mmap'ed file.

mem:the memory input
size:the length of the memory block
enc:the charset encoding if known
Returns:the new parser input or NULL

Function: xmlParserInputBufferGrow

int	xmlParserInputBufferGrow	(xmlParserInputBufferPtr in, 
					 int len)

Grow up the content of the input buffer, the old data are preserved This routine handle the I18N transcoding to internal UTF-8 This routine is used when operating the parser in normal (pull) mode TODO: one should be able to remove one extra copy by copying directly onto in->buffer or in->raw

in:a buffered parser input
len:indicative value of the amount of chars to read
Returns:the number of chars read and stored in the buffer, or -1 in case of error.

Function: xmlParserInputBufferPush

int	xmlParserInputBufferPush	(xmlParserInputBufferPtr in, 
					 int len, 
					 const char * buf)

Push the content of the arry in the input buffer This routine handle the I18N transcoding to internal UTF-8 This is used when operating the parser in progressive (push) mode.

in:a buffered parser input
len:the size in bytes of the array.
buf:an char array
Returns:the number of chars read and stored in the buffer, or -1 in case of error.

Function: xmlParserInputBufferRead

int	xmlParserInputBufferRead	(xmlParserInputBufferPtr in, 
					 int len)

Refresh the content of the input buffer, the old data are considered consumed This routine handle the I18N transcoding to internal UTF-8

in:a buffered parser input
len:indicative value of the amount of chars to read
Returns:the number of chars read and stored in the buffer, or -1 in case of error.

Function: xmlPopInputCallbacks

int	xmlPopInputCallbacks		(void)

Clear the top input callback from the input stack. this includes the compiled-in I/O.

Returns:the number of input callback registered or -1 in case of error.

Function: xmlRegisterDefaultInputCallbacks

void	xmlRegisterDefaultInputCallbacks	(void)

Registers the default compiled-in I/O handlers.

Function: xmlRegisterDefaultOutputCallbacks

void	xmlRegisterDefaultOutputCallbacks	(void)

Registers the default compiled-in I/O handlers.

Function: xmlRegisterHTTPPostCallbacks

void	xmlRegisterHTTPPostCallbacks	(void)

By default, libxml submits HTTP output requests using the "PUT" method. Calling this method changes the HTTP output method to use the "POST" method instead.

Function: xmlRegisterInputCallbacks

int	xmlRegisterInputCallbacks	(xmlInputMatchCallback matchFunc, 
					 xmlInputOpenCallback openFunc, 
					 xmlInputReadCallback readFunc, 
					 xmlInputCloseCallback closeFunc)

Register a new set of I/O callback for handling parser input.

matchFunc:the xmlInputMatchCallback
openFunc:the xmlInputOpenCallback
readFunc:the xmlInputReadCallback
closeFunc:the xmlInputCloseCallback
Returns:the registered handler number or -1 in case of error

Function: xmlRegisterOutputCallbacks

int	xmlRegisterOutputCallbacks	(xmlOutputMatchCallback matchFunc, 
					 xmlOutputOpenCallback openFunc, 
					 xmlOutputWriteCallback writeFunc, 
					 xmlOutputCloseCallback closeFunc)

Register a new set of I/O callback for handling output.

matchFunc:the xmlOutputMatchCallback
openFunc:the xmlOutputOpenCallback
writeFunc:the xmlOutputWriteCallback
closeFunc:the xmlOutputCloseCallback
Returns:the registered handler number or -1 in case of error

Daniel Veillard