Module xmlsave from libxml2

# ## Module xmlsave from libxml2

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API to save document or subtree of document ## Table of Contents
    Structure xmlSaveCtxt
    struct _xmlSaveCtxt
    The content of this structure is not made public by the API.
    Typedef xmlSaveCtxt * xmlSaveCtxtPtr
    Enum xmlSaveOption
    int	xmlSaveClose			(xmlSaveCtxtPtr ctxt)
    long	xmlSaveDoc			(xmlSaveCtxtPtr ctxt,
    					 xmlDocPtr doc)
    int	xmlSaveFlush			(xmlSaveCtxtPtr ctxt)
    int	xmlSaveSetAttrEscape		(xmlSaveCtxtPtr ctxt,
    					 xmlCharEncodingOutputFunc escape)
    int	xmlSaveSetEscape		(xmlSaveCtxtPtr ctxt,
    					 xmlCharEncodingOutputFunc escape)
    xmlSaveCtxtPtr	xmlSaveToBuffer		(xmlBufferPtr buffer,
    					 const char * encoding,
    					 int options)
    xmlSaveCtxtPtr	xmlSaveToFd		(int fd,
    					 const char * encoding,
    					 int options)
    xmlSaveCtxtPtr	xmlSaveToFilename	(const char * filename,
    					 const char * encoding,
    					 int options)
    xmlSaveCtxtPtr	xmlSaveToIO		(xmlOutputWriteCallback iowrite,
    					 xmlOutputCloseCallback ioclose,
    					 void * ioctx,
    					 const char * encoding,
    					 int options)
    long	xmlSaveTree			(xmlSaveCtxtPtr ctxt,
    					 xmlNodePtr node)
## Description ### Structure xmlSaveCtxt
    Structure xmlSaveCtxt
    struct _xmlSaveCtxt {
    The content of this structure is not made public by the API.
    }
### Enum xmlSaveOption
    Enum xmlSaveOption {
        XML_SAVE_FORMAT = 1 : format save output
        XML_SAVE_NO_DECL = 2 : drop the xml declaration
        XML_SAVE_NO_EMPTY = 4 : no empty tags
        XML_SAVE_NO_XHTML = 8 : disable XHTML1 specific rules
        XML_SAVE_XHTML = 16 : force XHTML1 specific rules
        XML_SAVE_AS_XML = 32 : force XML serialization on HTML doc
        XML_SAVE_AS_HTML = 64 : force HTML serialization on XML doc
        XML_SAVE_WSNONSIG = 128 : format with non-significant whitespace
    }
### Function: xmlSaveClose
    int	xmlSaveClose			(xmlSaveCtxtPtr ctxt)
Close a document saving context, i.e. make sure that all bytes have been output and free the associated data.
`ctxt`: | a document saving context
`Returns`: | the number of byte written or -1 in case of error.
### Function: xmlSaveDoc
    long	xmlSaveDoc			(xmlSaveCtxtPtr ctxt,
    					 xmlDocPtr doc)
Save a full document to a saving context TODO: The function is not fully implemented yet as it does not return the byte count but 0 instead
`ctxt`: | a document saving context
`doc`: | a document
`Returns`: | the number of byte written or -1 in case of error
### Function: xmlSaveFlush
    int	xmlSaveFlush			(xmlSaveCtxtPtr ctxt)
Flush a document saving context, i.e. make sure that all bytes have been output.
`ctxt`: | a document saving context
`Returns`: | the number of byte written or -1 in case of error.
### Function: xmlSaveSetAttrEscape
    int	xmlSaveSetAttrEscape		(xmlSaveCtxtPtr ctxt,
    					 xmlCharEncodingOutputFunc escape)
Set a custom escaping function to be used for text in attribute content
`ctxt`: | a document saving context
`escape`: | the escaping function
`Returns`: | 0 if successful or -1 in case of error.
### Function: xmlSaveSetEscape
    int	xmlSaveSetEscape		(xmlSaveCtxtPtr ctxt,
    					 xmlCharEncodingOutputFunc escape)
Set a custom escaping function to be used for text in element content
`ctxt`: | a document saving context
`escape`: | the escaping function
`Returns`: | 0 if successful or -1 in case of error.
### Function: xmlSaveToBuffer
    xmlSaveCtxtPtr	xmlSaveToBuffer		(xmlBufferPtr buffer,
    					 const char * encoding,
    					 int options)
Create a document saving context serializing to a buffer with the encoding and the options given
`buffer`: | a buffer
`encoding`: | the encoding name to use or NULL
`options`: | a set of xmlSaveOptions
`Returns`: | a new serialization context or NULL in case of error.
### Function: xmlSaveToFd
    xmlSaveCtxtPtr	xmlSaveToFd		(int fd,
    					 const char * encoding,
    					 int options)
Create a document saving context serializing to a file descriptor with the encoding and the options given.
`fd`: | a file descriptor number
`encoding`: | the encoding name to use or NULL
`options`: | a set of xmlSaveOptions
`Returns`: | a new serialization context or NULL in case of error.
### Function: xmlSaveToFilename
    xmlSaveCtxtPtr	xmlSaveToFilename	(const char * filename,
    					 const char * encoding,
    					 int options)
Create a document saving context serializing to a filename or possibly to an URL (but this is less reliable) with the encoding and the options given.
`filename`: | a file name or an URL
`encoding`: | the encoding name to use or NULL
`options`: | a set of xmlSaveOptions
`Returns`: | a new serialization context or NULL in case of error.
### Function: xmlSaveToIO
    xmlSaveCtxtPtr	xmlSaveToIO		(xmlOutputWriteCallback iowrite,
    					 xmlOutputCloseCallback ioclose,
    					 void * ioctx,
    					 const char * encoding,
    					 int options)
Create a document saving context serializing to a file descriptor with the encoding and the options given
`iowrite`: | an I/O write function
`ioclose`: | an I/O close function
`ioctx`: | an I/O handler
`encoding`: | the encoding name to use or NULL
`options`: | a set of xmlSaveOptions
`Returns`: | a new serialization context or NULL in case of error.
### Function: xmlSaveTree
    long	xmlSaveTree			(xmlSaveCtxtPtr ctxt,
    					 xmlNodePtr node)
Save a subtree starting at the node parameter to a saving context TODO: The function is not fully implemented yet as it does not return the byte count but 0 instead
`ctxt`: | a document saving context
`node`: | the top node of the subtree to save
`Returns`: | the number of byte written or -1 in case of error
Daniel Veillard