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audacity/lib-src/redland/raptor/src/raptor_libxml.c
ra 58caf78a86 Move library tree where it belongs
2010-01-24 09:19:39 +00:00

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/* -*- Mode: c; c-basic-offset: 2 -*-
*
* raptor_libxml.c - Raptor libxml functions
*
* Copyright (C) 2000-2008, David Beckett http://www.dajobe.org/
* Copyright (C) 2000-2004, University of Bristol, UK http://www.bristol.ac.uk/
*
* This package is Free Software and part of Redland http://librdf.org/
*
* It is licensed under the following three licenses as alternatives:
* 1. GNU Lesser General Public License (LGPL) V2.1 or any newer version
* 2. GNU General Public License (GPL) V2 or any newer version
* 3. Apache License, V2.0 or any newer version
*
* You may not use this file except in compliance with at least one of
* the above three licenses.
*
* See LICENSE.html or LICENSE.txt at the top of this package for the
* complete terms and further detail along with the license texts for
* the licenses in COPYING.LIB, COPYING and LICENSE-2.0.txt respectively.
*
*
*/
#ifdef HAVE_CONFIG_H
#include <raptor_config.h>
#endif
#ifdef WIN32
#include <win32_raptor_config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdarg.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
/* Raptor includes */
#include "raptor.h"
#include "raptor_internal.h"
#ifdef RAPTOR_XML_LIBXML
/* prototypes */
static void raptor_libxml_warning(void* user_data, const char *msg, ...) RAPTOR_PRINTF_FORMAT(2, 3);
static void raptor_libxml_error_common(void* user_data, const char *msg, va_list args, const char *prefix, int is_fatal) RAPTOR_PRINTF_FORMAT(2, 0);
static void raptor_libxml_error(void *context, const char *msg, ...) RAPTOR_PRINTF_FORMAT(2, 3);
static void raptor_libxml_fatal_error(void *context, const char *msg, ...) RAPTOR_PRINTF_FORMAT(2, 3);
static const char* const xml_warning_prefix="XML parser warning - ";
static const char* const xml_error_prefix="XML parser error - ";
static const char* const xml_generic_error_prefix="XML error - ";
static const char* const xml_fatal_error_prefix="XML parser fatal error - ";
static const char* const xml_validation_error_prefix="XML parser validation error - ";
static const char* const xml_validation_warning_prefix="XML parser validation warning - ";
#ifdef HAVE_XMLSAX2INTERNALSUBSET
/* SAX2 - 2.6.0 or later */
#define libxml2_internalSubset xmlSAX2InternalSubset
#define libxml2_externalSubset xmlSAX2ExternalSubset
#define libxml2_isStandalone xmlSAX2IsStandalone
#define libxml2_hasInternalSubset xmlSAX2HasInternalSubset
#define libxml2_hasExternalSubset xmlSAX2HasExternalSubset
#define libxml2_resolveEntity xmlSAX2ResolveEntity
#define libxml2_getEntity xmlSAX2GetEntity
#define libxml2_getParameterEntity xmlSAX2GetParameterEntity
#define libxml2_entityDecl xmlSAX2EntityDecl
#define libxml2_unparsedEntityDecl xmlSAX2UnparsedEntityDecl
#define libxml2_startDocument xmlSAX2StartDocument
#define libxml2_endDocument xmlSAX2EndDocument
#else
/* SAX1 - before libxml2 2.6.0 */
#define libxml2_internalSubset internalSubset
#define libxml2_externalSubset externalSubset
#define libxml2_isStandalone isStandalone
#define libxml2_hasInternalSubset hasInternalSubset
#define libxml2_hasExternalSubset hasExternalSubset
#define libxml2_resolveEntity resolveEntity
#define libxml2_getEntity getEntity
#define libxml2_getParameterEntity getParameterEntity
#define libxml2_entityDecl entityDecl
#define libxml2_unparsedEntityDecl unparsedEntityDecl
#define libxml2_startDocument startDocument
#define libxml2_endDocument endDocument
#endif
static void
raptor_libxml_internalSubset(void* user_data, const xmlChar *name,
const xmlChar *ExternalID, const xmlChar *SystemID) {
raptor_sax2* sax2=(raptor_sax2*)user_data;
libxml2_internalSubset(sax2->xc, name, ExternalID, SystemID);
}
#ifdef RAPTOR_LIBXML_XMLSAXHANDLER_EXTERNALSUBSET
static void
raptor_libxml_externalSubset(void* user_data, const xmlChar *name,
const xmlChar *ExternalID, const xmlChar *SystemID)
{
raptor_sax2* sax2=(raptor_sax2*)user_data;
libxml2_externalSubset(sax2->xc, name, ExternalID, SystemID);
}
#endif
static int
raptor_libxml_isStandalone (void* user_data)
{
raptor_sax2* sax2=(raptor_sax2*)user_data;
return libxml2_isStandalone(sax2->xc);
}
static int
raptor_libxml_hasInternalSubset (void* user_data)
{
raptor_sax2* sax2=(raptor_sax2*)user_data;
return libxml2_hasInternalSubset(sax2->xc);
}
static int
raptor_libxml_hasExternalSubset (void* user_data)
{
raptor_sax2* sax2=(raptor_sax2*)user_data;
return libxml2_hasExternalSubset(sax2->xc);
}
static xmlParserInputPtr
raptor_libxml_resolveEntity(void* user_data,
const xmlChar *publicId, const xmlChar *systemId) {
raptor_sax2* sax2=(raptor_sax2*)user_data;
return libxml2_resolveEntity(sax2->xc, publicId, systemId);
}
static xmlEntityPtr
raptor_libxml_getEntity(void* user_data, const xmlChar *name) {
raptor_sax2* sax2=(raptor_sax2*)user_data;
return libxml2_getEntity(sax2->xc, name);
}
static xmlEntityPtr
raptor_libxml_getParameterEntity(void* user_data, const xmlChar *name) {
raptor_sax2* sax2=(raptor_sax2*)user_data;
return libxml2_getParameterEntity(sax2->xc, name);
}
static void
raptor_libxml_entityDecl(void* user_data, const xmlChar *name, int type,
const xmlChar *publicId, const xmlChar *systemId,
xmlChar *content) {
raptor_sax2* sax2=(raptor_sax2*)user_data;
libxml2_entityDecl(sax2->xc, name, type, publicId, systemId, content);
}
static void
raptor_libxml_unparsedEntityDecl(void* user_data, const xmlChar *name,
const xmlChar *publicId, const xmlChar *systemId,
const xmlChar *notationName) {
raptor_sax2* sax2=(raptor_sax2*)user_data;
libxml2_unparsedEntityDecl(sax2->xc, name, publicId, systemId, notationName);
}
static void
raptor_libxml_startDocument(void* user_data) {
raptor_sax2* sax2=(raptor_sax2*)user_data;
libxml2_startDocument(sax2->xc);
}
static void
raptor_libxml_endDocument(void* user_data) {
raptor_sax2* sax2=(raptor_sax2*)user_data;
xmlParserCtxtPtr xc=sax2->xc;
libxml2_endDocument(sax2->xc);
if(xc->myDoc) {
xmlFreeDoc(xc->myDoc);
xc->myDoc=NULL;
}
}
static void
raptor_libxml_set_document_locator(void* user_data, xmlSAXLocatorPtr loc)
{
raptor_sax2* sax2=(raptor_sax2*)user_data;
sax2->loc=loc;
}
void
raptor_libxml_update_document_locator(raptor_sax2* sax2,
raptor_locator* locator)
{
/* for storing error info */
xmlSAXLocatorPtr loc=sax2 ? sax2->loc : NULL;
xmlParserCtxtPtr xc= sax2 ? sax2->xc : NULL;
if(xc && xc->inSubset)
return;
if(!locator)
return;
locator->line= -1;
locator->column= -1;
if(!xc)
return;
if(loc) {
locator->line=loc->getLineNumber(xc);
/* Seems to be broken */
/* locator->column=loc->getColumnNumber(xc); */
}
}
static void
raptor_libxml_warning(void* user_data, const char *msg, ...)
{
raptor_sax2* sax2=NULL;
va_list args;
int prefix_length=strlen(xml_warning_prefix);
int length;
char *nmsg;
/* Work around libxml2 bug - sometimes the sax2->error
* returns a ctx, sometimes the userdata
*/
if(((raptor_sax2*)user_data)->magic == RAPTOR_LIBXML_MAGIC)
sax2=(raptor_sax2*)user_data;
else
/* user_data is not userData */
sax2=(raptor_sax2*)((xmlParserCtxtPtr)user_data)->userData;
va_start(args, msg);
raptor_libxml_update_document_locator(sax2, sax2->locator);
length=prefix_length+strlen(msg)+1;
nmsg=(char*)RAPTOR_MALLOC(cstring, length);
if(nmsg) {
strcpy(nmsg, xml_warning_prefix);
strcpy(nmsg+prefix_length, msg);
if(nmsg[length-2]=='\n')
nmsg[length-2]='\0';
}
raptor_log_error_varargs(RAPTOR_LOG_LEVEL_WARNING,
sax2->error_handlers->handlers[RAPTOR_LOG_LEVEL_WARNING].handler,
sax2->error_handlers->handlers[RAPTOR_LOG_LEVEL_WARNING].user_data,
sax2->locator,
nmsg ? nmsg : msg,
args);
if(nmsg)
RAPTOR_FREE(cstring,nmsg);
va_end(args);
}
static void
raptor_libxml_error_common(void* user_data, const char *msg, va_list args,
const char *prefix, int is_fatal)
{
raptor_sax2* sax2=NULL;
int prefix_length=strlen(prefix);
int length;
char *nmsg;
if(user_data) {
/* Work around libxml2 bug - sometimes the sax2->error
* returns a user_data, sometimes the userdata
*/
if(((raptor_sax2*)user_data)->magic == RAPTOR_LIBXML_MAGIC)
sax2=(raptor_sax2*)user_data;
else
/* user_data is not userData */
sax2=(raptor_sax2*)((xmlParserCtxtPtr)user_data)->userData;
}
if(sax2->locator)
raptor_libxml_update_document_locator(sax2, sax2->locator);
length=prefix_length+strlen(msg)+1;
nmsg=(char*)RAPTOR_MALLOC(cstring, length);
if(nmsg) {
strcpy(nmsg, prefix);
strcpy(nmsg+prefix_length, msg);
if(nmsg[length-1]=='\n')
nmsg[length-1]='\0';
}
if(is_fatal)
raptor_log_error_varargs(RAPTOR_LOG_LEVEL_FATAL,
sax2->error_handlers->handlers[RAPTOR_LOG_LEVEL_FATAL].handler,
sax2->error_handlers->handlers[RAPTOR_LOG_LEVEL_FATAL].user_data,
sax2->locator,
nmsg ? nmsg : msg,
args);
else
raptor_log_error_varargs(RAPTOR_LOG_LEVEL_ERROR,
sax2->error_handlers->handlers[RAPTOR_LOG_LEVEL_ERROR].handler,
sax2->error_handlers->handlers[RAPTOR_LOG_LEVEL_ERROR].user_data,
sax2->locator,
nmsg ? nmsg : msg,
args);
if(nmsg)
RAPTOR_FREE(cstring,nmsg);
}
static void
raptor_libxml_error(void* user_data, const char *msg, ...)
{
va_list args;
va_start(args, msg);
raptor_libxml_error_common(user_data, msg, args, xml_error_prefix, 0);
va_end(args);
}
void
raptor_libxml_generic_error(void* user_data, const char *msg, ...)
{
raptor_error_handlers* error_handlers=(raptor_error_handlers*)user_data;
va_list args;
const char* prefix=xml_generic_error_prefix;
int prefix_length=strlen(prefix);
int length;
char *nmsg;
va_start(args, msg);
/* no SAX2 and locator from error_handlers */
length=prefix_length+strlen(msg)+1;
nmsg=(char*)RAPTOR_MALLOC(cstring, length);
if(nmsg) {
strcpy(nmsg, prefix);
strcpy(nmsg+prefix_length, msg);
if(nmsg[length-1]=='\n')
nmsg[length-1]='\0';
}
raptor_log_error_varargs(RAPTOR_LOG_LEVEL_ERROR,
error_handlers->handlers[RAPTOR_LOG_LEVEL_ERROR].handler,
error_handlers->handlers[RAPTOR_LOG_LEVEL_ERROR].user_data,
error_handlers->locator,
nmsg ? nmsg : msg,
args);
if(nmsg)
RAPTOR_FREE(cstring,nmsg);
va_end(args);
}
static void
raptor_libxml_fatal_error(void* user_data, const char *msg, ...)
{
va_list args;
va_start(args, msg);
raptor_libxml_error_common(user_data, msg, args, xml_fatal_error_prefix, 1);
va_end(args);
}
void
raptor_libxml_validation_error(void* user_data, const char *msg, ...)
{
va_list args;
va_start(args, msg);
raptor_libxml_error_common(user_data, msg, args,
xml_validation_error_prefix, 1);
va_end(args);
}
void
raptor_libxml_validation_warning(void* user_data, const char *msg, ...)
{
va_list args;
raptor_sax2* sax2=(raptor_sax2*)user_data;
int prefix_length=strlen(xml_validation_warning_prefix);
int length;
char *nmsg;
va_start(args, msg);
raptor_libxml_update_document_locator(sax2, sax2->locator);
length=prefix_length+strlen(msg)+1;
nmsg=(char*)RAPTOR_MALLOC(cstring, length);
if(nmsg) {
strcpy(nmsg, xml_validation_warning_prefix);
strcpy(nmsg+prefix_length, msg);
if(nmsg[length-2]=='\n')
nmsg[length-2]='\0';
}
raptor_log_error_varargs(RAPTOR_LOG_LEVEL_WARNING,
sax2->error_handlers->handlers[RAPTOR_LOG_LEVEL_WARNING].handler,
sax2->error_handlers->handlers[RAPTOR_LOG_LEVEL_WARNING].user_data,
sax2->locator,
nmsg ? nmsg : msg,
args);
if(nmsg)
RAPTOR_FREE(cstring,nmsg);
va_end(args);
}
void
raptor_libxml_init(raptor_sax2* sax2, raptor_uri *base_uri)
{
xmlSAXHandler *sax=&sax2->sax;
sax->internalSubset = raptor_libxml_internalSubset;
sax->isStandalone = raptor_libxml_isStandalone;
sax->hasInternalSubset = raptor_libxml_hasInternalSubset;
sax->hasExternalSubset = raptor_libxml_hasExternalSubset;
sax->resolveEntity = raptor_libxml_resolveEntity;
sax->getEntity = raptor_libxml_getEntity;
sax->getParameterEntity = raptor_libxml_getParameterEntity;
sax->entityDecl = raptor_libxml_entityDecl;
sax->attributeDecl = NULL; /* attributeDecl */
sax->elementDecl = NULL; /* elementDecl */
sax->notationDecl = NULL; /* notationDecl */
sax->unparsedEntityDecl = raptor_libxml_unparsedEntityDecl;
sax->setDocumentLocator = raptor_libxml_set_document_locator;
sax->startDocument = raptor_libxml_startDocument;
sax->endDocument = raptor_libxml_endDocument;
sax->startElement= raptor_sax2_start_element;
sax->endElement= raptor_sax2_end_element;
sax->reference = NULL; /* reference */
sax->characters= raptor_sax2_characters;
sax->cdataBlock= raptor_sax2_cdata; /* like <![CDATA[...]> */
sax->ignorableWhitespace= raptor_sax2_cdata;
sax->processingInstruction = NULL; /* processingInstruction */
sax->comment = raptor_sax2_comment; /* comment */
sax->warning=(warningSAXFunc)raptor_libxml_warning;
sax->error=(errorSAXFunc)raptor_libxml_error;
sax->fatalError=(fatalErrorSAXFunc)raptor_libxml_fatal_error;
#ifdef RAPTOR_LIBXML_XMLSAXHANDLER_EXTERNALSUBSET
sax->externalSubset = raptor_libxml_externalSubset;
#endif
#ifdef RAPTOR_LIBXML_XMLSAXHANDLER_INITIALIZED
sax->initialized = 1;
#endif
}
void
raptor_libxml_init_sax_error_handlers(xmlSAXHandler *sax) {
sax->warning=(warningSAXFunc)raptor_libxml_warning;
sax->error=(errorSAXFunc)raptor_libxml_error;
sax->fatalError=(fatalErrorSAXFunc)raptor_libxml_fatal_error;
#ifdef RAPTOR_LIBXML_XMLSAXHANDLER_INITIALIZED
sax->initialized = 1;
#endif
}
void
raptor_libxml_free(xmlParserCtxtPtr xc) {
libxml2_endDocument(xc);
if(xc->myDoc) {
xmlFreeDoc(xc->myDoc);
xc->myDoc=NULL;
}
xmlFreeParserCtxt(xc);
}
#if LIBXML_VERSION >= 20621
#define XML_LAST_DL XML_FROM_I18N
#else
#if LIBXML_VERSION >= 20617
#define XML_LAST_DL XML_FROM_WRITER
#else
#if LIBXML_VERSION >= 20616
#define XML_LAST_DL XML_FROM_CHECK
#else
#if LIBXML_VERSION >= 20615
#define XML_LAST_DL XML_FROM_VALID
#else
#define XML_LAST_DL XML_FROM_XSLT
#endif
#endif
#endif
#endif
/* All other symbols not specifically below noted were added during
* the period 2-10 October 2003 which is before the minimum libxml2
* version 2.6.8 release date of Mar 23 2004.
*
* When the minimum libxml2 version goes up, the #ifdefs for
* older versions can be removed.
*/
static const char* const raptor_libxml_domain_labels[XML_LAST_DL+2]= {
NULL, /* XML_FROM_NONE */
"parser", /* XML_FROM_PARSER */
"tree", /* XML_FROM_TREE */
"namespace", /* XML_FROM_NAMESPACE */
"validity", /* XML_FROM_DTD */
"HTML parser", /* XML_FROM_HTML */
"memory", /* XML_FROM_MEMORY */
"output", /* XML_FROM_OUTPUT */
"I/O" , /* XML_FROM_IO */
"FTP", /* XML_FROM_FTP */
#if LIBXML_VERSION >= 20618
/* 2005-02-13 - v2.6.18 */
"HTTP", /* XML_FROM_HTTP */
#endif
"XInclude", /* XML_FROM_XINCLUDE */
"XPath", /* XML_FROM_XPATH */
"parser", /* XML_FROM_XPOINTER */
"regexp", /* XML_FROM_REGEXP */
"Schemas datatype", /* XML_FROM_DATATYPE */
"Schemas parser", /* XML_FROM_SCHEMASP */
"Schemas validity", /* XML_FROM_SCHEMASV */
"Relax-NG parser", /* XML_FROM_RELAXNGP */
"Relax-NG validity", /* XML_FROM_RELAXNGV */
"Catalog", /* XML_FROM_CATALOG */
"C14", /* XML_FROM_C14N */
"XSLT", /* XML_FROM_XSLT */
#if LIBXML_VERSION >= 20615
/* 2004-10-07 - v2.6.15 */
"validity", /* XML_FROM_VALID */
#endif
#if LIBXML_VERSION >= 20616
/* 2004-11-04 - v2.6.16 */
"checking", /* XML_FROM_CHECK */
#endif
#if LIBXML_VERSION >= 20617
/* 2005-01-04 - v2.6.17 */
"writer", /* XML_FROM_WRITER */
#endif
#if LIBXML_VERSION >= 20621
/* 2005-08-24 - v2.6.21 */
"module", /* XML_FROM_MODULE */
"encoding", /* XML_FROM_I18N */
#endif
NULL
};
void
raptor_libxml_xmlStructuredErrorFunc(void *user_data, xmlErrorPtr err)
{
raptor_error_handlers* error_handlers=(raptor_error_handlers*)user_data;
raptor_stringbuffer* sb;
char *nmsg;
raptor_message_handler handler=NULL;
void* handler_data=NULL;
raptor_log_level level=RAPTOR_LOG_LEVEL_ERROR;
if(err == NULL || err->code == XML_ERR_OK || err->level == XML_ERR_NONE)
return;
/* Do not warn about things with no location */
if(err->level == XML_ERR_WARNING && !err->file)
return;
/* XML fatal errors never cause an abort */
if(err->level == XML_ERR_FATAL)
err->level= XML_ERR_ERROR;
sb=raptor_new_stringbuffer();
if(err->domain != XML_FROM_HTML)
raptor_stringbuffer_append_counted_string(sb, (const unsigned char*)"XML ",
4, 1);
if(err->domain != XML_FROM_NONE && err->domain < XML_LAST_DL) {
const unsigned char* label;
label=(const unsigned char*)raptor_libxml_domain_labels[(int)err->domain];
raptor_stringbuffer_append_string(sb, label, 1);
raptor_stringbuffer_append_counted_string(sb,
(const unsigned char*)" ", 1, 1);
}
if(err->level == XML_ERR_WARNING)
raptor_stringbuffer_append_counted_string(sb,
(const unsigned char*)"warning: ",
9, 1);
else /* XML_ERR_ERROR or XML_ERR_FATAL */
raptor_stringbuffer_append_counted_string(sb, (const unsigned char*)"error: ",
7, 1);
if(err->message) {
unsigned char* msg;
size_t len;
msg=(unsigned char*)err->message;
len= strlen((const char*)msg);
if(len && msg[len-1] == '\n')
msg[--len]='\0';
raptor_stringbuffer_append_counted_string(sb, msg, len, 1);
}
#if LIBXML_VERSION >= 20618
/* 2005-02-13 - v2.6.18 */
/* str1 has the detailed HTTP error */
if(err->domain == XML_FROM_HTTP && err->str1) {
unsigned char* msg;
size_t len;
msg=(unsigned char*)err->str1;
len= strlen((const char*)msg);
if(len && msg[len-1] == '\n')
msg[--len]='\0';
raptor_stringbuffer_append_counted_string(sb, (const unsigned char*)" - ",
3, 1);
raptor_stringbuffer_append_counted_string(sb, msg, len, 1);
}
#endif
/* When err->domain == XML_FROM_XPATH then err->int1 is
* the offset into err->str1, the line with the error
*/
if(err->domain == XML_FROM_XPATH && err->str1) {
raptor_stringbuffer_append_counted_string(sb, (const unsigned char*)" in ",
4, 1);
raptor_stringbuffer_append_string(sb, (const unsigned char*)err->str1, 1);
}
if(error_handlers) {
if(error_handlers->magic != RAPTOR_ERROR_HANDLER_MAGIC) {
#ifdef RAPTOR_DEBUG
if(1) /* FIXME */
RAPTOR_DEBUG2("Received bogus error_handlers pointer %p\n",
error_handlers);
else
RAPTOR_FATAL2("Received bogus error_handlers pointer %p\n",
error_handlers);
#endif
error_handlers=NULL;
}
}
nmsg=(char*)raptor_stringbuffer_as_string(sb);
if(err->level == XML_ERR_FATAL)
level=RAPTOR_LOG_LEVEL_FATAL;
else if(err->level == XML_ERR_ERROR)
level=RAPTOR_LOG_LEVEL_ERROR;
else
level=RAPTOR_LOG_LEVEL_WARNING;
if(error_handlers && level <= error_handlers->last_log_level) {
handler=error_handlers->handlers[level].handler;
handler_data=error_handlers->handlers[level].user_data;
}
raptor_log_error(level, handler, handler_data,
(error_handlers ? error_handlers->locator : NULL),
nmsg);
raptor_free_stringbuffer(sb);
}
/* end if RAPTOR_XML_LIBXML */
#endif
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