xmlparse.c

《unix/Linux下的Curses库开发指南》综合示例程序

/*
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in
compliance with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/

Software distributed under the License is distributed on an "AS IS"
basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
License for the specific language governing rights and limitations
under the License.

The Original Code is expat.

The Initial Developer of the Original Code is James Clark.
Portions created by James Clark are Copyright (C) 1998, 1999
James Clark. All Rights Reserved.

Contributor(s):

Alternatively, the contents of this file may be used under the terms
of the GNU General Public License (the "GPL"), in which case the
provisions of the GPL are applicable instead of those above.  If you
wish to allow use of your version of this file only under the terms of
the GPL and not to allow others to use your version of this file under
the MPL, indicate your decision by deleting the provisions above and
replace them with the notice and other provisions required by the
GPL. If you do not delete the provisions above, a recipient may use
your version of this file under either the MPL or the GPL.
*/

#include "xmldef.h"
#include "xmlparse.h"

#ifdef XML_UNICODE
#define XML_ENCODE_MAX XML_UTF16_ENCODE_MAX
#define XmlConvert XmlUtf16Convert
#define XmlGetInternalEncoding XmlGetUtf16InternalEncoding
#define XmlGetInternalEncodingNS XmlGetUtf16InternalEncodingNS
#define XmlEncode XmlUtf16Encode
#define MUST_CONVERT(enc, s) (!(enc)->isUtf16 || (((unsigned long)s) & 1))
typedef unsigned short ICHAR;
#else
#define XML_ENCODE_MAX XML_UTF8_ENCODE_MAX
#define XmlConvert XmlUtf8Convert
#define XmlGetInternalEncoding XmlGetUtf8InternalEncoding
#define XmlGetInternalEncodingNS XmlGetUtf8InternalEncodingNS
#define XmlEncode XmlUtf8Encode
#define MUST_CONVERT(enc, s) (!(enc)->isUtf8)
typedef char ICHAR;
#endif


#ifndef XML_NS

#define XmlInitEncodingNS XmlInitEncoding
#define XmlInitUnknownEncodingNS XmlInitUnknownEncoding
#undef XmlGetInternalEncodingNS
#define XmlGetInternalEncodingNS XmlGetInternalEncoding
#define XmlParseXmlDeclNS XmlParseXmlDecl

#endif


#ifdef XML_UNICODE_WCHAR_T
#define XML_T(x) L ## x
#else
#define XML_T(x) x
#endif

/* Round up n to be a multiple of sz, where sz is a power of 2. */
#define ROUND_UP(n, sz) (((n) + ((sz) - 1)) & ~((sz) - 1))

#include "xmltok.h"
#include "xmlrole.h"
#include "hashtable.h"

#define INIT_TAG_BUF_SIZE 32  /* must be a multiple of sizeof(XML_Char) */
#define INIT_DATA_BUF_SIZE 1024
#define INIT_ATTS_SIZE 16
#define INIT_BLOCK_SIZE 1024
#define INIT_BUFFER_SIZE 1024

#define EXPAND_SPARE 24

typedef struct binding {
  struct prefix *prefix;
  struct binding *nextTagBinding;
  struct binding *prevPrefixBinding;
  const struct attribute_id *attId;
  XML_Char *uri;
  int uriLen;
  int uriAlloc;
} BINDING;

typedef struct prefix {
  const XML_Char *name;
  BINDING *binding;
} PREFIX;

typedef struct {
  const XML_Char *str;
  const XML_Char *localPart;
  int uriLen;
} TAG_NAME;

typedef struct tag {
  struct tag *parent;
  const char *rawName;
  int rawNameLength;
  TAG_NAME name;
  char *buf;
  char *bufEnd;
  BINDING *bindings;
} TAG;

typedef struct {
  const XML_Char *name;
  const XML_Char *textPtr;
  int textLen;
  const XML_Char *systemId;
  const XML_Char *base;
  const XML_Char *publicId;
  const XML_Char *notation;
  char open;
} ENTITY;

typedef struct block {
  struct block *next;
  int size;
  XML_Char s[1];
} BLOCK;

typedef struct {
  BLOCK *blocks;
  BLOCK *freeBlocks;
  const XML_Char *end;
  XML_Char *ptr;
  XML_Char *start;
} STRING_POOL;

/* The XML_Char before the name is used to determine whether
an attribute has been specified. */
typedef struct attribute_id {
  XML_Char *name;
  PREFIX *prefix;
  char maybeTokenized;
  char xmlns;
} ATTRIBUTE_ID;

typedef struct {
  const ATTRIBUTE_ID *id;
  char isCdata;
  const XML_Char *value;
} DEFAULT_ATTRIBUTE;

typedef struct {
  const XML_Char *name;
  PREFIX *prefix;
  int nDefaultAtts;
  int allocDefaultAtts;
  DEFAULT_ATTRIBUTE *defaultAtts;
} ELEMENT_TYPE;

typedef struct {
  HASH_TABLE generalEntities;
  HASH_TABLE elementTypes;
  HASH_TABLE attributeIds;
  HASH_TABLE prefixes;
  STRING_POOL pool;
  int complete;
  int standalone;
  const XML_Char *base;
  PREFIX defaultPrefix;
} DTD;

typedef struct open_internal_entity {
  const char *internalEventPtr;
  const char *internalEventEndPtr;
  struct open_internal_entity *next;
  ENTITY *entity;
} OPEN_INTERNAL_ENTITY;

typedef enum XML_Error Processor(XML_Parser parser,
				 const char *start,
				 const char *end,
				 const char **endPtr);

static Processor prologProcessor;
static Processor prologInitProcessor;
static Processor contentProcessor;
static Processor cdataSectionProcessor;
static Processor epilogProcessor;
static Processor errorProcessor;
static Processor externalEntityInitProcessor;
static Processor externalEntityInitProcessor2;
static Processor externalEntityInitProcessor3;
static Processor externalEntityContentProcessor;

static enum XML_Error
handleUnknownEncoding(XML_Parser parser, const XML_Char *encodingName);
static enum XML_Error
processXmlDecl(XML_Parser parser, int isGeneralTextEntity, const char *, const char *);
static enum XML_Error
initializeEncoding(XML_Parser parser);
static enum XML_Error
doContent(XML_Parser parser, int startTagLevel, const ENCODING *enc,
	  const char *start, const char *end, const char **endPtr);
static enum XML_Error
doCdataSection(XML_Parser parser, const ENCODING *, const char **startPtr, const char *end, const char **nextPtr);
static enum XML_Error storeAtts(XML_Parser parser, const ENCODING *, const char *s,
				TAG_NAME *tagNamePtr, BINDING **bindingsPtr);
static
int addBinding(XML_Parser parser, PREFIX *prefix, const ATTRIBUTE_ID *attId, const XML_Char *uri, BINDING **bindingsPtr);
static int
defineAttribute(ELEMENT_TYPE *type, ATTRIBUTE_ID *, int isCdata, const XML_Char *dfltValue);
static enum XML_Error
storeAttributeValue(XML_Parser parser, const ENCODING *, int isCdata, const char *, const char *,
		    STRING_POOL *);
static enum XML_Error
appendAttributeValue(XML_Parser parser, const ENCODING *, int isCdata, const char *, const char *,
		    STRING_POOL *);
static ATTRIBUTE_ID *
getAttributeId(XML_Parser parser, const ENCODING *enc, const char *start, const char *end);
static int setElementTypePrefix(XML_Parser parser, ELEMENT_TYPE *);
static enum XML_Error
storeEntityValue(XML_Parser parser, const char *start, const char *end);
static int
reportProcessingInstruction(XML_Parser parser, const ENCODING *enc, const char *start, const char *end);
static int
reportComment(XML_Parser parser, const ENCODING *enc, const char *start, const char *end);
static void
reportDefault(XML_Parser parser, const ENCODING *enc, const char *start, const char *end);

static const XML_Char *getContext(XML_Parser parser);
static int setContext(XML_Parser parser, const XML_Char *context);
static void normalizePublicId(XML_Char *s);
static int dtdInit(DTD *);
static void dtdDestroy(DTD *);
static int dtdCopy(DTD *newDtd, const DTD *oldDtd);
static void poolInit(STRING_POOL *);
static void poolClear(STRING_POOL *);
static void poolDestroy(STRING_POOL *);
static XML_Char *poolAppend(STRING_POOL *pool, const ENCODING *enc,
			    const char *ptr, const char *end);
static XML_Char *poolStoreString(STRING_POOL *pool, const ENCODING *enc,
				  const char *ptr, const char *end);
static int poolGrow(STRING_POOL *pool);
static const XML_Char *poolCopyString(STRING_POOL *pool, const XML_Char *s);
static const XML_Char *poolCopyStringN(STRING_POOL *pool, const XML_Char *s, int n);

#define poolStart(pool) ((pool)->start)
#define poolEnd(pool) ((pool)->ptr)
#define poolLength(pool) ((pool)->ptr - (pool)->start)
#define poolChop(pool) ((void)--(pool->ptr))
#define poolLastChar(pool) (((pool)->ptr)[-1])
#define poolDiscard(pool) ((pool)->ptr = (pool)->start)
#define poolFinish(pool) ((pool)->start = (pool)->ptr)
#define poolAppendChar(pool, c) \
  (((pool)->ptr == (pool)->end && !poolGrow(pool)) \
   ? 0 \
   : ((*((pool)->ptr)++ = c), 1))

typedef struct {
  /* The first member must be userData so that the XML_GetUserData macro works. */
  void *m_userData;
  void *m_handlerArg;
  char *m_buffer;
  /* first character to be parsed */
  const char *m_bufferPtr;
  /* past last character to be parsed */
  char *m_bufferEnd;
  /* allocated end of buffer */
  const char *m_bufferLim;
  long m_parseEndByteIndex;
  const char *m_parseEndPtr;
  XML_Char *m_dataBuf;
  XML_Char *m_dataBufEnd;
  XML_StartElementHandler m_startElementHandler;
  XML_EndElementHandler m_endElementHandler;
  XML_CharacterDataHandler m_characterDataHandler;
  XML_ProcessingInstructionHandler m_processingInstructionHandler;
  XML_CommentHandler m_commentHandler;
  XML_StartCdataSectionHandler m_startCdataSectionHandler;
  XML_EndCdataSectionHandler m_endCdataSectionHandler;
  XML_DefaultHandler m_defaultHandler;
  XML_UnparsedEntityDeclHandler m_unparsedEntityDeclHandler;
  XML_NotationDeclHandler m_notationDeclHandler;
  XML_StartNamespaceDeclHandler m_startNamespaceDeclHandler;
  XML_EndNamespaceDeclHandler m_endNamespaceDeclHandler;
  XML_NotStandaloneHandler m_notStandaloneHandler;
  XML_ExternalEntityRefHandler m_externalEntityRefHandler;
  void *m_externalEntityRefHandlerArg;
  XML_UnknownEncodingHandler m_unknownEncodingHandler;
  const ENCODING *m_encoding;
  INIT_ENCODING m_initEncoding;
  const XML_Char *m_protocolEncodingName;
  int m_ns;
  void *m_unknownEncodingMem;
  void *m_unknownEncodingData;
  void *m_unknownEncodingHandlerData;
  void (*m_unknownEncodingRelease)(void *);
  PROLOG_STATE m_prologState;
  Processor *m_processor;
  enum XML_Error m_errorCode;
  const char *m_eventPtr;
  const char *m_eventEndPtr;
  const char *m_positionPtr;
  OPEN_INTERNAL_ENTITY *m_openInternalEntities;
  int m_defaultExpandInternalEntities;
  int m_tagLevel;
  ENTITY *m_declEntity;
  const XML_Char *m_declNotationName;
  const XML_Char *m_declNotationPublicId;
  ELEMENT_TYPE *m_declElementType;
  ATTRIBUTE_ID *m_declAttributeId;
  char m_declAttributeIsCdata;
  DTD m_dtd;
  TAG *m_tagStack;
  TAG *m_freeTagList;
  BINDING *m_inheritedBindings;
  BINDING *m_freeBindingList;
  int m_attsSize;
  int m_nSpecifiedAtts;
  ATTRIBUTE *m_atts;
  POSITION m_position;
  STRING_POOL m_tempPool;
  STRING_POOL m_temp2Pool;
  char *m_groupConnector;
  unsigned m_groupSize;
  int m_hadExternalDoctype;
  XML_Char m_namespaceSeparator;
} Parser;

#define userData (((Parser *)parser)->m_userData)
#define handlerArg (((Parser *)parser)->m_handlerArg)
#define startElementHandler (((Parser *)parser)->m_startElementHandler)
#define endElementHandler (((Parser *)parser)->m_endElementHandler)
#define characterDataHandler (((Parser *)parser)->m_characterDataHandler)
#define processingInstructionHandler (((Parser *)parser)->m_processingInstructionHandler)
#define commentHandler (((Parser *)parser)->m_commentHandler)
#define startCdataSectionHandler (((Parser *)parser)->m_startCdataSectionHandler)
#define endCdataSectionHandler (((Parser *)parser)->m_endCdataSectionHandler)
#define defaultHandler (((Parser *)parser)->m_defaultHandler)
#define unparsedEntityDeclHandler (((Parser *)parser)->m_unparsedEntityDeclHandler)
#define notationDeclHandler (((Parser *)parser)->m_notationDeclHandler)
#define startNamespaceDeclHandler (((Parser *)parser)->m_startNamespaceDeclHandler)
#define endNamespaceDeclHandler (((Parser *)parser)->m_endNamespaceDeclHandler)
#define notStandaloneHandler (((Parser *)parser)->m_notStandaloneHandler)
#define externalEntityRefHandler (((Parser *)parser)->m_externalEntityRefHandler)
#define externalEntityRefHandlerArg (((Parser *)parser)->m_externalEntityRefHandlerArg)
#define unknownEncodingHandler (((Parser *)parser)->m_unknownEncodingHandler)
#define encoding (((Parser *)parser)->m_encoding)
#define initEncoding (((Parser *)parser)->m_initEncoding)
#define unknownEncodingMem (((Parser *)parser)->m_unknownEncodingMem)
#define unknownEncodingData (((Parser *)parser)->m_unknownEncodingData)
#define unknownEncodingHandlerData \
  (((Parser *)parser)->m_unknownEncodingHandlerData)
#define unknownEncodingRelease (((Parser *)parser)->m_unknownEncodingRelease)
#define protocolEncodingName (((Parser *)parser)->m_protocolEncodingName)
#define ns (((Parser *)parser)->m_ns)
#define prologState (((Parser *)parser)->m_prologState)
#define processor (((Parser *)parser)->m_processor)
#define errorCode (((Parser *)parser)->m_errorCode)
#define eventPtr (((Parser *)parser)->m_eventPtr)
#define eventEndPtr (((Parser *)parser)->m_eventEndPtr)
#define positionPtr (((Parser *)parser)->m_positionPtr)
#define position (((Parser *)parser)->m_position)
#define openInternalEntities (((Parser *)parser)->m_openInternalEntities)
#define defaultExpandInternalEntities (((Parser *)parser)->m_defaultExpandInternalEntities)
#define tagLevel (((Parser *)parser)->m_tagLevel)
#define buffer (((Parser *)parser)->m_buffer)
#define bufferPtr (((Parser *)parser)->m_bufferPtr)
#define bufferEnd (((Parser *)parser)->m_bufferEnd)
#define parseEndByteIndex (((Parser *)parser)->m_parseEndByteIndex)
#define parseEndPtr (((Parser *)parser)->m_parseEndPtr)
#define bufferLim (((Parser *)parser)->m_bufferLim)
#define dataBuf (((Parser *)parser)->m_dataBuf)
#define dataBufEnd (((Parser *)parser)->m_dataBufEnd)
#define dtd (((Parser *)parser)->m_dtd)
#define declEntity (((Parser *)parser)->m_declEntity)
#define declNotationName (((Parser *)parser)->m_declNotationName)
#define declNotationPublicId (((Parser *)parser)->m_declNotationPublicId)
#define declElementType (((Parser *)parser)->m_declElementType)
#define declAttributeId (((Parser *)parser)->m_declAttributeId)
#define declAttributeIsCdata (((Parser *)parser)->m_declAttributeIsCdata)
#define freeTagList (((Parser *)parser)->m_freeTagList)
#define freeBindingList (((Parser *)parser)->m_freeBindingList)
#define inheritedBindings (((Parser *)parser)->m_inheritedBindings)
#define tagStack (((Parser *)parser)->m_tagStack)
#define atts (((Parser *)parser)->m_atts)
#define attsSize (((Parser *)parser)->m_attsSize)
#define nSpecifiedAtts (((Parser *)parser)->m_nSpecifiedAtts)
#define tempPool (((Parser *)parser)->m_tempPool)
#define temp2Pool (((Parser *)parser)->m_temp2Pool)
#define groupConnector (((Parser *)parser)->m_groupConnector)
#define groupSize (((Parser *)parser)->m_groupSize)
#define hadExternalDoctype (((Parser *)parser)->m_hadExternalDoctype)
#define namespaceSeparator (((Parser *)parser)->m_namespaceSeparator)

#ifdef _MSC_VER
#ifdef _DEBUG
Parser *asParser(XML_Parser parser)
{
  return parser;
}
#endif
#endif

XML_Parser XML_ParserCreate(const XML_Char *encodingName)
{
  XML_Parser parser = malloc(sizeof(Parser));
  if (!parser)
    return parser;
  processor = prologInitProcessor;
  XmlPrologStateInit(&prologState);
  userData = 0;
  handlerArg = 0;
  startElementHandler = 0;
  endElementHandler = 0;
  characterDataHandler = 0;
  processingInstructionHandler = 0;
  commentHandler = 0;
  startCdataSectionHandler = 0;
  endCdataSectionHandler = 0;
  defaultHandler = 0;
  unparsedEntityDeclHandler = 0;
  notationDeclHandler = 0;
  startNamespaceDeclHandler = 0;
  endNamespaceDeclHandler = 0;
  notStandaloneHandler = 0;
  externalEntityRefHandler = 0;
  externalEntityRefHandlerArg = parser;
  unknownEncodingHandler = 0;
  buffer = 0;
  bufferPtr = 0;
  bufferEnd = 0;
  parseEndByteIndex = 0;
  parseEndPtr = 0;
  bufferLim = 0;
  declElementType = 0;
  declAttributeId = 0;
  declEntity = 0;
  declNotationName = 0;
  declNotationPublicId = 0;
  memset(&position, 0, sizeof(POSITION));
  errorCode = XML_ERROR_NONE;
  eventPtr = 0;
  eventEndPtr = 0;
  positionPtr = 0;
  openInternalEntities = 0;
  tagLevel = 0;
  tagStack = 0;
  freeTagList = 0;