xmlparse.c

一个很好用的解析

}

void
xmlrpc_XML_SetUnparsedEntityDeclHandler(XML_Parser parser,
                                        XML_UnparsedEntityDeclHandler handler)
{
  unparsedEntityDeclHandler = handler;
}

void
xmlrpc_XML_SetExternalParsedEntityDeclHandler(
    XML_Parser parser,
    XML_ExternalParsedEntityDeclHandler handler)
{
  externalParsedEntityDeclHandler = handler;
}

void
xmlrpc_XML_SetInternalParsedEntityDeclHandler(
    XML_Parser parser,
    XML_InternalParsedEntityDeclHandler handler)
{
  internalParsedEntityDeclHandler = handler;
}

void
xmlrpc_XML_SetNotationDeclHandler(XML_Parser parser,
                                  XML_NotationDeclHandler handler)
{
  notationDeclHandler = handler;
}

void
xmlrpc_XML_SetNamespaceDeclHandler(XML_Parser parser,
                                   XML_StartNamespaceDeclHandler start,
                                   XML_EndNamespaceDeclHandler end)
{
  startNamespaceDeclHandler = start;
  endNamespaceDeclHandler = end;
}

void
xmlrpc_XML_SetNotStandaloneHandler(XML_Parser parser,
                                   XML_NotStandaloneHandler handler)
{
  notStandaloneHandler = handler;
}

void
xmlrpc_XML_SetExternalEntityRefHandler(XML_Parser parser,
                                       XML_ExternalEntityRefHandler handler)
{
  externalEntityRefHandler = handler;
}

void
xmlrpc_XML_SetExternalEntityRefHandlerArg(XML_Parser parser, void *arg)
{
  if (arg)
    externalEntityRefHandlerArg = arg;
  else
    externalEntityRefHandlerArg = parser;
}

void
xmlrpc_XML_SetUnknownEncodingHandler(XML_Parser parser,
                                     XML_UnknownEncodingHandler handler,
                                     void *data)
{
  unknownEncodingHandler = handler;
  unknownEncodingHandlerData = data;
}



int
xmlrpc_XML_SetParamEntityParsing(
    XML_Parser                  const parser  ATTR_UNUSED,
    enum XML_ParamEntityParsing const parsing) {
    
    int retval;

#ifdef XML_DTD
    paramEntityParsing = parsing;
    retval = 1;
#else
    retval = parsing == XML_PARAM_ENTITY_PARSING_NEVER;
#endif

    return retval;
}



int
xmlrpc_XML_Parse(XML_Parser parser, const char *s, int len, int isFinal)
{
  if (len == 0) {
    if (!isFinal)
      return 1;
    positionPtr = bufferPtr;
    errorCode = processor(parser, bufferPtr, parseEndPtr = bufferEnd, 0);
    if (errorCode == XML_ERROR_NONE)
      return 1;
    eventEndPtr = eventPtr;
    processor = errorProcessor;
    return 0;
  }
  else if (bufferPtr == bufferEnd) {
    const char *end;
    int nLeftOver;
    parseEndByteIndex += len;
    positionPtr = s;
    if (isFinal) {
      errorCode = processor(parser, s, parseEndPtr = s + len, 0);
      if (errorCode == XML_ERROR_NONE)
        return 1;
      eventEndPtr = eventPtr;
      processor = errorProcessor;
      return 0;
    }
    errorCode = processor(parser, s, parseEndPtr = s + len, &end);
    if (errorCode != XML_ERROR_NONE) {
      eventEndPtr = eventPtr;
      processor = errorProcessor;
      return 0;
    }
    XmlUpdatePosition(encoding, positionPtr, end, &position);
    nLeftOver = s + len - end;
    if (nLeftOver) {
      if (buffer == 0 || nLeftOver > bufferLim - buffer) {
        /* FIXME avoid integer overflow */
        buffer = buffer == 0 ? malloc(len * 2) : realloc(buffer, len * 2);
        /* FIXME storage leak if realloc fails */
        if (!buffer) {
          errorCode = XML_ERROR_NO_MEMORY;
          eventPtr = eventEndPtr = 0;
          processor = errorProcessor;
          return 0;
        }
        bufferLim = buffer + len * 2;
      }
      memcpy(buffer, end, nLeftOver);
      bufferPtr = buffer;
      bufferEnd = buffer + nLeftOver;
    }
    return 1;
  }
  else {
    memcpy(xmlrpc_XML_GetBuffer(parser, len), s, len);
    return xmlrpc_XML_ParseBuffer(parser, len, isFinal);
  }
}

int
xmlrpc_XML_ParseBuffer(XML_Parser parser, int len, int isFinal)
{
  const char *start = bufferPtr;
  positionPtr = start;
  bufferEnd += len;
  parseEndByteIndex += len;
  errorCode = processor(parser, start, parseEndPtr = bufferEnd,
                        isFinal ? (const char **)0 : &bufferPtr);
  if (errorCode == XML_ERROR_NONE) {
    if (!isFinal)
      XmlUpdatePosition(encoding, positionPtr, bufferPtr, &position);
    return 1;
  }
  else {
    eventEndPtr = eventPtr;
    processor = errorProcessor;
    return 0;
  }
}

void *
xmlrpc_XML_GetBuffer(XML_Parser parser, int len)
{
  if (len > bufferLim - bufferEnd) {
    /* FIXME avoid integer overflow */
    int neededSize = len + (bufferEnd - bufferPtr);
    if (neededSize  <= bufferLim - buffer) {
      memmove(buffer, bufferPtr, bufferEnd - bufferPtr);
      bufferEnd = buffer + (bufferEnd - bufferPtr);
      bufferPtr = buffer;
    }
    else {
      char *newBuf;
      int bufferSize = bufferLim - bufferPtr;
      if (bufferSize == 0)
        bufferSize = INIT_BUFFER_SIZE;
      do {
        bufferSize *= 2;
      } while (bufferSize < neededSize);
      newBuf = malloc(bufferSize);
      if (newBuf == 0) {
        errorCode = XML_ERROR_NO_MEMORY;
        return 0;
      }
      bufferLim = newBuf + bufferSize;
      if (bufferPtr) {
        memcpy(newBuf, bufferPtr, bufferEnd - bufferPtr);
        free(buffer);
      }
      bufferEnd = newBuf + (bufferEnd - bufferPtr);
      bufferPtr = buffer = newBuf;
    }
  }
  return bufferEnd;
}

enum XML_Error
xmlrpc_XML_GetErrorCode(XML_Parser parser)
{
  return errorCode;
}

long
xmlrpc_XML_GetCurrentByteIndex(XML_Parser parser)
{
  if (eventPtr)
    return parseEndByteIndex - (parseEndPtr - eventPtr);
  return -1;
}

int
xmlrpc_XML_GetCurrentByteCount(XML_Parser parser)
{
  if (eventEndPtr && eventPtr)
    return eventEndPtr - eventPtr;
  return 0;
}

int
xmlrpc_XML_GetCurrentLineNumber(XML_Parser parser)
{
  if (eventPtr) {
    XmlUpdatePosition(encoding, positionPtr, eventPtr, &position);
    positionPtr = eventPtr;
  }
  return position.lineNumber + 1;
}

int
xmlrpc_XML_GetCurrentColumnNumber(XML_Parser parser)
{
  if (eventPtr) {
    XmlUpdatePosition(encoding, positionPtr, eventPtr, &position);
    positionPtr = eventPtr;
  }
  return position.columnNumber;
}

void
xmlrpc_XML_DefaultCurrent(XML_Parser parser)
{
  if (defaultHandler) {
    if (openInternalEntities)
      reportDefault(parser,
                    internalEncoding,
                    openInternalEntities->internalEventPtr,
                    openInternalEntities->internalEventEndPtr);
    else
      reportDefault(parser, encoding, eventPtr, eventEndPtr);
  }
}

const XML_LChar *
xmlrpc_XML_ErrorString(int const code) {

    static const XML_LChar * const message[] = {
        NULL,
        XML_T("out of memory"),
        XML_T("syntax error"),
        XML_T("no element found"),
        XML_T("not well-formed"),
        XML_T("unclosed token"),
        XML_T("unclosed token"),
        XML_T("mismatched tag"),
        XML_T("duplicate attribute"),
        XML_T("junk after document element"),
        XML_T("illegal parameter entity reference"),
        XML_T("undefined entity"),
        XML_T("recursive entity reference"),
        XML_T("asynchronous entity"),
        XML_T("reference to invalid character number"),
        XML_T("reference to binary entity"),
        XML_T("reference to external entity in attribute"),
        XML_T("xml processing instruction not at start of external entity"),
        XML_T("unknown encoding"),
        XML_T("encoding specified in XML declaration is incorrect"),
        XML_T("unclosed CDATA section"),
        XML_T("error in processing external entity reference"),
        XML_T("document is not standalone")
    };

    const XML_LChar * retval;

    if (code > 0 && (unsigned)code < ARRAY_SIZE(message))
        retval = message[code];
    else
        retval = NULL;
    
    return retval;
}

static
enum XML_Error contentProcessor(XML_Parser parser,
                                const char *start,
                                const char *end,
                                const char **endPtr)
{
  return doContent(parser, 0, encoding, start, end, endPtr);
}

static
enum XML_Error externalEntityInitProcessor(XML_Parser parser,
                                           const char *start,
                                           const char *end,
                                           const char **endPtr)
{
  enum XML_Error result = initializeEncoding(parser);
  if (result != XML_ERROR_NONE)
    return result;
  processor = externalEntityInitProcessor2;
  return externalEntityInitProcessor2(parser, start, end, endPtr);
}

static
enum XML_Error externalEntityInitProcessor2(XML_Parser parser,
                                            const char *start,
                                            const char *end,
                                            const char **endPtr)
{
  const char *next;
  int tok = XmlContentTok(encoding, start, end, &next);
  switch (tok) {
  case XML_TOK_BOM:
    start = next;
    break;
  case XML_TOK_PARTIAL:
    if (endPtr) {
      *endPtr = start;
      return XML_ERROR_NONE;
    }
    eventPtr = start;
    return XML_ERROR_UNCLOSED_TOKEN;
  case XML_TOK_PARTIAL_CHAR:
    if (endPtr) {
      *endPtr = start;
      return XML_ERROR_NONE;
    }
    eventPtr = start;
    return XML_ERROR_PARTIAL_CHAR;
  }
  processor = externalEntityInitProcessor3;
  return externalEntityInitProcessor3(parser, start, end, endPtr);
}

static
enum XML_Error externalEntityInitProcessor3(XML_Parser parser,
                                            const char *start,
                                            const char *end,
                                            const char **endPtr)
{
  const char *next;
  int tok = XmlContentTok(encoding, start, end, &next);
  switch (tok) {
  case XML_TOK_XML_DECL:
    {
      enum XML_Error result = processXmlDecl(parser, 1, start, next);
      if (result != XML_ERROR_NONE)
        return result;
      start = next;
    }
    break;
  case XML_TOK_PARTIAL:
    if (endPtr) {
      *endPtr = start;
      return XML_ERROR_NONE;
    }
    eventPtr = start;
    return XML_ERROR_UNCLOSED_TOKEN;
  case XML_TOK_PARTIAL_CHAR:
    if (endPtr) {
      *endPtr = start;
      return XML_ERROR_NONE;
    }
    eventPtr = start;
    return XML_ERROR_PARTIAL_CHAR;
  }
  processor = externalEntityContentProcessor;
  tagLevel = 1;
  return doContent(parser, 1, encoding, start, end, endPtr);
}

static
enum XML_Error externalEntityContentProcessor(XML_Parser parser,
                                              const char *start,
                                              const char *end,
                                              const char **endPtr)
{
  return doContent(parser, 1, encoding, start, end, endPtr);
}

static enum XML_Error
doContent(XML_Parser parser,
          int startTagLevel,
          const ENCODING *enc,
          const char *s,
          const char *end,
          const char **nextPtr)
{
  const char **eventPP;
  const char **eventEndPP;
  if (enc == encoding) {
    eventPP = &eventPtr;