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xmlwriter.c
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/*
* xmlwriter.c: XML text writer implementation
*
* For license and disclaimer see the license and disclaimer of
* libxml2.
*
*/
#define IN_LIBXML
#include "libxml.h"
#include <string.h>
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/uri.h>
#include <libxml/HTMLtree.h>
#ifdef LIBXML_WRITER_ENABLED
#include <libxml/xmlwriter.h>
#include "buf.h"
#include "enc.h"
#include "save.h"
#define B64LINELEN 72
#define B64CRLF "\r\n"
/*
* The following VA_COPY was coded following an example in
* the Samba project. It may not be sufficient for some
* esoteric implementations of va_list but (hopefully) will
* be sufficient for libxml2.
*/
#ifndef VA_COPY
#ifdef HAVE_VA_COPY
#define VA_COPY(dest, src) va_copy(dest, src)
#else
#ifdef HAVE___VA_COPY
#define VA_COPY(dest,src) __va_copy(dest, src)
#else
#ifndef VA_LIST_IS_ARRAY
#define VA_COPY(dest,src) (dest) = (src)
#else
#include <string.h>
#define VA_COPY(dest,src) memcpy((char *)(dest),(char *)(src),sizeof(va_list))
#endif
#endif
#endif
#endif
/*
* Types are kept private
*/
typedef enum {
XML_TEXTWRITER_NONE = 0,
XML_TEXTWRITER_NAME,
XML_TEXTWRITER_ATTRIBUTE,
XML_TEXTWRITER_TEXT,
XML_TEXTWRITER_PI,
XML_TEXTWRITER_PI_TEXT,
XML_TEXTWRITER_CDATA,
XML_TEXTWRITER_DTD,
XML_TEXTWRITER_DTD_TEXT,
XML_TEXTWRITER_DTD_ELEM,
XML_TEXTWRITER_DTD_ELEM_TEXT,
XML_TEXTWRITER_DTD_ATTL,
XML_TEXTWRITER_DTD_ATTL_TEXT,
XML_TEXTWRITER_DTD_ENTY, /* entity */
XML_TEXTWRITER_DTD_ENTY_TEXT,
XML_TEXTWRITER_DTD_PENT, /* parameter entity */
XML_TEXTWRITER_COMMENT
} xmlTextWriterState;
typedef struct _xmlTextWriterStackEntry xmlTextWriterStackEntry;
struct _xmlTextWriterStackEntry {
xmlChar *name;
xmlTextWriterState state;
};
typedef struct _xmlTextWriterNsStackEntry xmlTextWriterNsStackEntry;
struct _xmlTextWriterNsStackEntry {
xmlChar *prefix;
xmlChar *uri;
xmlLinkPtr elem;
};
struct _xmlTextWriter {
xmlOutputBufferPtr out; /* output buffer */
xmlListPtr nodes; /* element name stack */
xmlListPtr nsstack; /* name spaces stack */
int level;
int indent; /* enable indent */
int doindent; /* internal indent flag */
xmlChar *ichar; /* indent character */
char qchar; /* character used for quoting attribute values */
xmlParserCtxtPtr ctxt;
int no_doc_free;
xmlDocPtr doc;
};
static void xmlFreeTextWriterStackEntry(xmlLinkPtr lk);
static int xmlCmpTextWriterStackEntry(const void *data0,
const void *data1);
static int xmlTextWriterOutputNSDecl(xmlTextWriterPtr writer);
static void xmlFreeTextWriterNsStackEntry(xmlLinkPtr lk);
static int xmlCmpTextWriterNsStackEntry(const void *data0,
const void *data1);
static int xmlTextWriterWriteDocCallback(void *context,
const char *str, int len);
static int xmlTextWriterCloseDocCallback(void *context);
static xmlChar *xmlTextWriterVSprintf(const char *format, va_list argptr) LIBXML_ATTR_FORMAT(1,0);
static int xmlOutputBufferWriteBase64(xmlOutputBufferPtr out, int len,
const unsigned char *data);
static void xmlTextWriterStartDocumentCallback(void *ctx);
static int xmlTextWriterWriteIndent(xmlTextWriterPtr writer);
static int
xmlTextWriterHandleStateDependencies(xmlTextWriterPtr writer,
xmlTextWriterStackEntry * p);
/**
* xmlWriterErrMsg:
* @ctxt: a writer context
* @error: the error number
* @msg: the error message
*
* Handle a writer error
*/
static void
xmlWriterErrMsg(xmlTextWriterPtr ctxt, xmlParserErrors error,
const char *msg)
{
if (ctxt != NULL) {
__xmlRaiseError(NULL, NULL, NULL, ctxt->ctxt,
NULL, XML_FROM_WRITER, error, XML_ERR_FATAL,
NULL, 0, NULL, NULL, NULL, 0, 0, "%s", msg);
} else {
__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_WRITER, error,
XML_ERR_FATAL, NULL, 0, NULL, NULL, NULL, 0, 0, "%s", msg);
}
}
/**
* xmlWriterErrMsgInt:
* @ctxt: a writer context
* @error: the error number
* @msg: the error message
* @val: an int
*
* Handle a writer error
*/
static void LIBXML_ATTR_FORMAT(3,0)
xmlWriterErrMsgInt(xmlTextWriterPtr ctxt, xmlParserErrors error,
const char *msg, int val)
{
if (ctxt != NULL) {
__xmlRaiseError(NULL, NULL, NULL, ctxt->ctxt,
NULL, XML_FROM_WRITER, error, XML_ERR_FATAL,
NULL, 0, NULL, NULL, NULL, val, 0, msg, val);
} else {
__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_WRITER, error,
XML_ERR_FATAL, NULL, 0, NULL, NULL, NULL, val, 0, msg, val);
}
}
/**
* xmlNewTextWriter:
* @out: an xmlOutputBufferPtr
*
* Create a new xmlNewTextWriter structure using an xmlOutputBufferPtr
* NOTE: the @out parameter will be deallocated when the writer is closed
* (if the call succeed.)
*
* Returns the new xmlTextWriterPtr or NULL in case of error
*/
xmlTextWriterPtr
xmlNewTextWriter(xmlOutputBufferPtr out)
{
xmlTextWriterPtr ret;
ret = (xmlTextWriterPtr) xmlMalloc(sizeof(xmlTextWriter));
if (ret == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_NO_MEMORY,
"xmlNewTextWriter : out of memory!\n");
return NULL;
}
memset(ret, 0, (size_t) sizeof(xmlTextWriter));
ret->nodes = xmlListCreate(xmlFreeTextWriterStackEntry,
xmlCmpTextWriterStackEntry);
if (ret->nodes == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_NO_MEMORY,
"xmlNewTextWriter : out of memory!\n");
xmlFree(ret);
return NULL;
}
ret->nsstack = xmlListCreate(xmlFreeTextWriterNsStackEntry,
xmlCmpTextWriterNsStackEntry);
if (ret->nsstack == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_NO_MEMORY,
"xmlNewTextWriter : out of memory!\n");
xmlListDelete(ret->nodes);
xmlFree(ret);
return NULL;
}
ret->out = out;
ret->ichar = xmlStrdup(BAD_CAST " ");
ret->qchar = '"';
if (!ret->ichar) {
xmlListDelete(ret->nodes);
xmlListDelete(ret->nsstack);
xmlFree(ret);
xmlWriterErrMsg(NULL, XML_ERR_NO_MEMORY,
"xmlNewTextWriter : out of memory!\n");
return NULL;
}
ret->doc = xmlNewDoc(NULL);
ret->no_doc_free = 0;
return ret;
}
/**
* xmlNewTextWriterFilename:
* @uri: the URI of the resource for the output
* @compression: compress the output?
*
* Create a new xmlNewTextWriter structure with @uri as output
*
* Returns the new xmlTextWriterPtr or NULL in case of error
*/
xmlTextWriterPtr
xmlNewTextWriterFilename(const char *uri, int compression)
{
xmlTextWriterPtr ret;
xmlOutputBufferPtr out;
out = xmlOutputBufferCreateFilename(uri, NULL, compression);
if (out == NULL) {
xmlWriterErrMsg(NULL, XML_IO_EIO,
"xmlNewTextWriterFilename : cannot open uri\n");
return NULL;
}
ret = xmlNewTextWriter(out);
if (ret == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_NO_MEMORY,
"xmlNewTextWriterFilename : out of memory!\n");
xmlOutputBufferClose(out);
return NULL;
}
ret->indent = 0;
ret->doindent = 0;
return ret;
}
/**
* xmlNewTextWriterMemory:
* @buf: xmlBufferPtr
* @compression: compress the output?
*
* Create a new xmlNewTextWriter structure with @buf as output
* TODO: handle compression
*
* Returns the new xmlTextWriterPtr or NULL in case of error
*/
xmlTextWriterPtr
xmlNewTextWriterMemory(xmlBufferPtr buf, int compression ATTRIBUTE_UNUSED)
{
xmlTextWriterPtr ret;
xmlOutputBufferPtr out;
/*::todo handle compression */
out = xmlOutputBufferCreateBuffer(buf, NULL);
if (out == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_NO_MEMORY,
"xmlNewTextWriterMemory : out of memory!\n");
return NULL;
}
ret = xmlNewTextWriter(out);
if (ret == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_NO_MEMORY,
"xmlNewTextWriterMemory : out of memory!\n");
xmlOutputBufferClose(out);
return NULL;
}
return ret;
}
/**
* xmlNewTextWriterPushParser:
* @ctxt: xmlParserCtxtPtr to hold the new XML document tree
* @compression: compress the output?
*
* Create a new xmlNewTextWriter structure with @ctxt as output
* NOTE: the @ctxt context will be freed with the resulting writer
* (if the call succeeds).
* TODO: handle compression
*
* Returns the new xmlTextWriterPtr or NULL in case of error
*/
xmlTextWriterPtr
xmlNewTextWriterPushParser(xmlParserCtxtPtr ctxt,
int compression ATTRIBUTE_UNUSED)
{
xmlTextWriterPtr ret;
xmlOutputBufferPtr out;
if (ctxt == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewTextWriterPushParser : invalid context!\n");
return NULL;
}
out = xmlOutputBufferCreateIO(xmlTextWriterWriteDocCallback,
xmlTextWriterCloseDocCallback,
(void *) ctxt, NULL);
if (out == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewTextWriterPushParser : error at xmlOutputBufferCreateIO!\n");
return NULL;
}
ret = xmlNewTextWriter(out);
if (ret == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewTextWriterPushParser : error at xmlNewTextWriter!\n");
xmlOutputBufferClose(out);
return NULL;
}
ret->ctxt = ctxt;
return ret;
}
/**
* xmlNewTextWriterDoc:
* @doc: address of a xmlDocPtr to hold the new XML document tree
* @compression: compress the output?
*
* Create a new xmlNewTextWriter structure with @*doc as output
*
* Returns the new xmlTextWriterPtr or NULL in case of error
*/
xmlTextWriterPtr
xmlNewTextWriterDoc(xmlDocPtr * doc, int compression)
{
xmlTextWriterPtr ret;
xmlSAXHandler saxHandler;
xmlParserCtxtPtr ctxt;
memset(&saxHandler, '\0', sizeof(saxHandler));
xmlSAX2InitDefaultSAXHandler(&saxHandler, 1);
saxHandler.startDocument = xmlTextWriterStartDocumentCallback;
saxHandler.startElement = xmlSAX2StartElement;
saxHandler.endElement = xmlSAX2EndElement;
ctxt = xmlCreatePushParserCtxt(&saxHandler, NULL, NULL, 0, NULL);
if (ctxt == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewTextWriterDoc : error at xmlCreatePushParserCtxt!\n");
return NULL;
}
/*
* For some reason this seems to completely break if node names
* are interned.
*/
ctxt->dictNames = 0;
ctxt->myDoc = xmlNewDoc(BAD_CAST XML_DEFAULT_VERSION);
if (ctxt->myDoc == NULL) {
xmlFreeParserCtxt(ctxt);
xmlWriterErrMsg(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewTextWriterDoc : error at xmlNewDoc!\n");
return NULL;
}
ret = xmlNewTextWriterPushParser(ctxt, compression);
if (ret == NULL) {
xmlFreeDoc(ctxt->myDoc);
xmlFreeParserCtxt(ctxt);
xmlWriterErrMsg(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewTextWriterDoc : error at xmlNewTextWriterPushParser!\n");
return NULL;
}
xmlSetDocCompressMode(ctxt->myDoc, compression);
if (doc != NULL) {
*doc = ctxt->myDoc;
ret->no_doc_free = 1;
}
return ret;
}
/**
* xmlNewTextWriterTree:
* @doc: xmlDocPtr
* @node: xmlNodePtr or NULL for doc->children
* @compression: compress the output?
*
* Create a new xmlNewTextWriter structure with @doc as output
* starting at @node
*
* Returns the new xmlTextWriterPtr or NULL in case of error
*/
xmlTextWriterPtr
xmlNewTextWriterTree(xmlDocPtr doc, xmlNodePtr node, int compression)
{
xmlTextWriterPtr ret;
xmlSAXHandler saxHandler;
xmlParserCtxtPtr ctxt;
if (doc == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewTextWriterTree : invalid document tree!\n");
return NULL;
}
memset(&saxHandler, '\0', sizeof(saxHandler));
xmlSAX2InitDefaultSAXHandler(&saxHandler, 1);
saxHandler.startDocument = xmlTextWriterStartDocumentCallback;
saxHandler.startElement = xmlSAX2StartElement;
saxHandler.endElement = xmlSAX2EndElement;
ctxt = xmlCreatePushParserCtxt(&saxHandler, NULL, NULL, 0, NULL);
if (ctxt == NULL) {
xmlWriterErrMsg(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewTextWriterDoc : error at xmlCreatePushParserCtxt!\n");
return NULL;
}
/*
* For some reason this seems to completely break if node names
* are interned.
*/
ctxt->dictNames = 0;
ret = xmlNewTextWriterPushParser(ctxt, compression);
if (ret == NULL) {
xmlFreeParserCtxt(ctxt);
xmlWriterErrMsg(NULL, XML_ERR_INTERNAL_ERROR,
"xmlNewTextWriterDoc : error at xmlNewTextWriterPushParser!\n");
return NULL;
}
ctxt->myDoc = doc;
ctxt->node = node;
ret->no_doc_free = 1;
xmlSetDocCompressMode(doc, compression);
return ret;
}
/**
* xmlFreeTextWriter:
* @writer: the xmlTextWriterPtr
*
* Deallocate all the resources associated to the writer
*/
void
xmlFreeTextWriter(xmlTextWriterPtr writer)
{
if (writer == NULL)
return;
if (writer->out != NULL)
xmlOutputBufferClose(writer->out);
if (writer->nodes != NULL)
xmlListDelete(writer->nodes);
if (writer->nsstack != NULL)
xmlListDelete(writer->nsstack);
if (writer->ctxt != NULL) {
if ((writer->ctxt->myDoc != NULL) && (writer->no_doc_free == 0)) {
xmlFreeDoc(writer->ctxt->myDoc);
writer->ctxt->myDoc = NULL;
}
xmlFreeParserCtxt(writer->ctxt);
}
if (writer->doc != NULL)
xmlFreeDoc(writer->doc);
if (writer->ichar != NULL)
xmlFree(writer->ichar);
xmlFree(writer);
}
/**
* xmlTextWriterStartDocument:
* @writer: the xmlTextWriterPtr
* @version: the xml version ("1.0") or NULL for default ("1.0")
* @encoding: the encoding or NULL for default
* @standalone: "yes" or "no" or NULL for default
*
* Start a new xml document
*
* Returns the bytes written (may be 0 because of buffering) or -1 in case of error
*/
int
xmlTextWriterStartDocument(xmlTextWriterPtr writer, const char *version,
const char *encoding, const char *standalone)
{
int count;
int sum;
xmlLinkPtr lk;
xmlCharEncodingHandlerPtr encoder;
if ((writer == NULL) || (writer->out == NULL)) {
xmlWriterErrMsg(writer, XML_ERR_INTERNAL_ERROR,
"xmlTextWriterStartDocument : invalid writer!\n");
return -1;
}
lk = xmlListFront(writer->nodes);
if ((lk != NULL) && (xmlLinkGetData(lk) != NULL)) {
xmlWriterErrMsg(writer, XML_ERR_INTERNAL_ERROR,
"xmlTextWriterStartDocument : not allowed in this context!\n");
return -1;
}
encoder = NULL;
if (encoding != NULL) {
encoder = xmlFindCharEncodingHandler(encoding);
if (encoder == NULL) {
xmlWriterErrMsg(writer, XML_ERR_NO_MEMORY,
"xmlTextWriterStartDocument : out of memory!\n");
return -1;
}
}
writer->out->encoder = encoder;
if (encoder != NULL) {
if (writer->out->conv == NULL) {
writer->out->conv = xmlBufCreateSize(4000);
}
xmlCharEncOutput(writer->out, 1);
if ((writer->doc != NULL) && (writer->doc->encoding == NULL))
writer->doc->encoding = xmlStrdup((xmlChar *)writer->out->encoder->name);
} else
writer->out->conv = NULL;
sum = 0;
count = xmlOutputBufferWriteString(writer->out, "<?xml version=");
if (count < 0)
return -1;
sum += count;
count = xmlOutputBufferWrite(writer->out, 1, &writer->qchar);
if (count < 0)
return -1;
sum += count;
if (version != 0)
count = xmlOutputBufferWriteString(writer->out, version);
else
count = xmlOutputBufferWriteString(writer->out, "1.0");
if (count < 0)
return -1;
sum += count;
count = xmlOutputBufferWrite(writer->out, 1, &writer->qchar);
if (count < 0)
return -1;
sum += count;
if (writer->out->encoder != 0) {
count = xmlOutputBufferWriteString(writer->out, " encoding=");
if (count < 0)
return -1;
sum += count;
count = xmlOutputBufferWrite(writer->out, 1, &writer->qchar);
if (count < 0)
return -1;
sum += count;
count =
xmlOutputBufferWriteString(writer->out,
writer->out->encoder->name);
if (count < 0)
return -1;
sum += count;
count = xmlOutputBufferWrite(writer->out, 1, &writer->qchar);
if (count < 0)
return -1;
sum += count;
}
if (standalone != 0) {
count = xmlOutputBufferWriteString(writer->out, " standalone=");
if (count < 0)
return -1;
sum += count;
count = xmlOutputBufferWrite(writer->out, 1, &writer->qchar);
if (count < 0)
return -1;
sum += count;
count = xmlOutputBufferWriteString(writer->out, standalone);
if (count < 0)
return -1;
sum += count;
count = xmlOutputBufferWrite(writer->out, 1, &writer->qchar);
if (count < 0)
return -1;
sum += count;
}
count = xmlOutputBufferWriteString(writer->out, "?>\n");
if (count < 0)
return -1;
sum += count;
return sum;
}
/**
* xmlTextWriterEndDocument:
* @writer: the xmlTextWriterPtr
*
* End an xml document. All open elements are closed, and
* the content is flushed to the output.
*
* Returns the bytes written or -1 in case of error
*/
int
xmlTextWriterEndDocument(xmlTextWriterPtr writer)
{
int count;
int sum;
xmlLinkPtr lk;
xmlTextWriterStackEntry *p;
if (writer == NULL) {
xmlWriterErrMsg(writer, XML_ERR_INTERNAL_ERROR,
"xmlTextWriterEndDocument : invalid writer!\n");
return -1;
}
sum = 0;
while ((lk = xmlListFront(writer->nodes)) != NULL) {
p = (xmlTextWriterStackEntry *) xmlLinkGetData(lk);
if (p == 0)
break;
switch (p->state) {
case XML_TEXTWRITER_NAME:
case XML_TEXTWRITER_ATTRIBUTE:
case XML_TEXTWRITER_TEXT:
count = xmlTextWriterEndElement(writer);
if (count < 0)
return -1;
sum += count;
break;
case XML_TEXTWRITER_PI:
case XML_TEXTWRITER_PI_TEXT:
count = xmlTextWriterEndPI(writer);
if (count < 0)
return -1;
sum += count;
break;
case XML_TEXTWRITER_CDATA:
count = xmlTextWriterEndCDATA(writer);
if (count < 0)
return -1;
sum += count;
break;
case XML_TEXTWRITER_DTD:
case XML_TEXTWRITER_DTD_TEXT:
case XML_TEXTWRITER_DTD_ELEM:
case XML_TEXTWRITER_DTD_ELEM_TEXT:
case XML_TEXTWRITER_DTD_ATTL:
case XML_TEXTWRITER_DTD_ATTL_TEXT:
case XML_TEXTWRITER_DTD_ENTY:
case XML_TEXTWRITER_DTD_ENTY_TEXT:
case XML_TEXTWRITER_DTD_PENT:
count = xmlTextWriterEndDTD(writer);
if (count < 0)
return -1;
sum += count;
break;
case XML_TEXTWRITER_COMMENT:
count = xmlTextWriterEndComment(writer);
if (count < 0)
return -1;
sum += count;
break;
default:
break;
}
}
if (!writer->indent) {
count = xmlOutputBufferWriteString(writer->out, "\n");
if (count < 0)
return -1;
sum += count;
}
sum += xmlTextWriterFlush(writer);
return sum;
}
/**
* xmlTextWriterStartComment:
* @writer: the xmlTextWriterPtr
*
* Start an xml comment.
*
* Returns the bytes written (may be 0 because of buffering) or -1 in case of error
*/
int
xmlTextWriterStartComment(xmlTextWriterPtr writer)
{
int count;
int sum;
xmlLinkPtr lk;
xmlTextWriterStackEntry *p;
if (writer == NULL) {
xmlWriterErrMsg(writer, XML_ERR_INTERNAL_ERROR,
"xmlTextWriterStartComment : invalid writer!\n");
return -1;
}
sum = 0;
lk = xmlListFront(writer->nodes);
if (lk != 0) {
p = (xmlTextWriterStackEntry *) xmlLinkGetData(lk);
if (p != 0) {
switch (p->state) {
case XML_TEXTWRITER_TEXT:
case XML_TEXTWRITER_NONE:
break;
case XML_TEXTWRITER_NAME:
/* Output namespace declarations */
count = xmlTextWriterOutputNSDecl(writer);
if (count < 0)
return -1;
sum += count;
count = xmlOutputBufferWriteString(writer->out, ">");
if (count < 0)
return -1;
sum += count;
if (writer->indent) {
count =
xmlOutputBufferWriteString(writer->out, "\n");
if (count < 0)
return -1;
sum += count;
}
p->state = XML_TEXTWRITER_TEXT;
break;
default:
return -1;
}
}
}
p = (xmlTextWriterStackEntry *)
xmlMalloc(sizeof(xmlTextWriterStackEntry));
if (p == 0) {
xmlWriterErrMsg(writer, XML_ERR_NO_MEMORY,
"xmlTextWriterStartElement : out of memory!\n");
return -1;
}
p->name = NULL;
p->state = XML_TEXTWRITER_COMMENT;
xmlListPushFront(writer->nodes, p);
if (writer->indent) {
count = xmlTextWriterWriteIndent(writer);
if (count < 0)
return -1;
sum += count;
}
count = xmlOutputBufferWriteString(writer->out, "<!--");
if (count < 0)
return -1;
sum += count;
return sum;
}
/**
* xmlTextWriterEndComment:
* @writer: the xmlTextWriterPtr
*
* End the current xml coment.
*
* Returns the bytes written (may be 0 because of buffering) or -1 in case of error
*/
int
xmlTextWriterEndComment(xmlTextWriterPtr writer)
{
int count;
int sum;
xmlLinkPtr lk;
xmlTextWriterStackEntry *p;
if (writer == NULL) {
xmlWriterErrMsg(writer, XML_ERR_INTERNAL_ERROR,
"xmlTextWriterEndComment : invalid writer!\n");
return -1;
}
lk = xmlListFront(writer->nodes);
if (lk == 0) {
xmlWriterErrMsg(writer, XML_ERR_INTERNAL_ERROR,
"xmlTextWriterEndComment : not allowed in this context!\n");
return -1;
}
p = (xmlTextWriterStackEntry *) xmlLinkGetData(lk);
if (p == 0)
return -1;
sum = 0;
switch (p->state) {
case XML_TEXTWRITER_COMMENT:
count = xmlOutputBufferWriteString(writer->out, "-->");
if (count < 0)
return -1;
sum += count;
break;
default:
return -1;
}
if (writer->indent) {
count = xmlOutputBufferWriteString(writer->out, "\n");
if (count < 0)
return -1;
sum += count;
}
xmlListPopFront(writer->nodes);
return sum;
}
/**
* xmlTextWriterWriteFormatComment:
* @writer: the xmlTextWriterPtr
* @format: format string (see printf)
* @...: extra parameters for the format
*
* Write an xml comment.
*
* Returns the bytes written (may be 0 because of buffering) or -1 in case of error
*/
int XMLCDECL
xmlTextWriterWriteFormatComment(xmlTextWriterPtr writer,
const char *format, ...)
{
int rc;
va_list ap;
va_start(ap, format);
rc = xmlTextWriterWriteVFormatComment(writer, format, ap);
va_end(ap);
return rc;
}
/**
* xmlTextWriterWriteVFormatComment:
* @writer: the xmlTextWriterPtr
* @format: format string (see printf)
* @argptr: pointer to the first member of the variable argument list.
*
* Write an xml comment.
*
* Returns the bytes written (may be 0 because of buffering) or -1 in case of error
*/
int
xmlTextWriterWriteVFormatComment(xmlTextWriterPtr writer,
const char *format, va_list argptr)
{
int rc;
xmlChar *buf;
if (writer == NULL) {
xmlWriterErrMsg(writer, XML_ERR_INTERNAL_ERROR,
"xmlTextWriterWriteVFormatComment : invalid writer!\n");
return -1;
}
buf = xmlTextWriterVSprintf(format, argptr);
if (buf == NULL)
return -1;
rc = xmlTextWriterWriteComment(writer, buf);
xmlFree(buf);
return rc;
}
/**
* xmlTextWriterWriteComment:
* @writer: the xmlTextWriterPtr
* @content: comment string
*
* Write an xml comment.
*
* Returns the bytes written (may be 0 because of buffering) or -1 in case of error
*/
int
xmlTextWriterWriteComment(xmlTextWriterPtr writer, const xmlChar * content)
{
int count;
int sum;
sum = 0;
count = xmlTextWriterStartComment(writer);
if (count < 0)
return -1;
sum += count;
count = xmlTextWriterWriteString(writer, content);
if (count < 0)
return -1;
sum += count;
count = xmlTextWriterEndComment(writer);
if (count < 0)
return -1;
sum += count;
return sum;
}
/**
* xmlTextWriterStartElement:
* @writer: the xmlTextWriterPtr
* @name: element name
*
* Start an xml element.
*
* Returns the bytes written (may be 0 because of buffering) or -1 in case of error
*/
int
xmlTextWriterStartElement(xmlTextWriterPtr writer, const xmlChar * name)
{
int count;
int sum;
xmlLinkPtr lk;
xmlTextWriterStackEntry *p;
if ((writer == NULL) || (name == NULL) || (*name == '\0'))
return -1;
sum = 0;
lk = xmlListFront(writer->nodes);
if (lk != 0) {
p = (xmlTextWriterStackEntry *) xmlLinkGetData(lk);
if (p != 0) {
switch (p->state) {
case XML_TEXTWRITER_PI:
case XML_TEXTWRITER_PI_TEXT:
return -1;
case XML_TEXTWRITER_NONE:
break;
case XML_TEXTWRITER_ATTRIBUTE:
count = xmlTextWriterEndAttribute(writer);
if (count < 0)
return -1;
sum += count;
/* fallthrough */
case XML_TEXTWRITER_NAME:
/* Output namespace declarations */
count = xmlTextWriterOutputNSDecl(writer);
if (count < 0)
return -1;
sum += count;
count = xmlOutputBufferWriteString(writer->out, ">");
if (count < 0)
return -1;
sum += count;
if (writer->indent)
count =
xmlOutputBufferWriteString(writer->out, "\n");
p->state = XML_TEXTWRITER_TEXT;
break;
default:
break;
}