XML_SetDoctypeDeclHandler(XML_Parser parser,
                          XML_StartDoctypeDeclHandler start,
                          XML_EndDoctypeDeclHandler end)
{
  startDoctypeDeclHandler = start;
  endDoctypeDeclHandler = end;
}

void XMLCALL
XML_SetStartDoctypeDeclHandler(XML_Parser parser,
                               XML_StartDoctypeDeclHandler start) {
  startDoctypeDeclHandler = start;
}

void XMLCALL
XML_SetEndDoctypeDeclHandler(XML_Parser parser,
                             XML_EndDoctypeDeclHandler end) {
  endDoctypeDeclHandler = end;
}

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

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

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

void XMLCALL
XML_SetStartNamespaceDeclHandler(XML_Parser parser,
                                 XML_StartNamespaceDeclHandler start) {
  startNamespaceDeclHandler = start;
}

void XMLCALL
XML_SetEndNamespaceDeclHandler(XML_Parser parser,
                               XML_EndNamespaceDeclHandler end) {
  endNamespaceDeclHandler = end;
}

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

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

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

void XMLCALL
XML_SetSkippedEntityHandler(XML_Parser parser,
                            XML_SkippedEntityHandler handler)
{
  skippedEntityHandler = handler;
}

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

void XMLCALL
XML_SetElementDeclHandler(XML_Parser parser,
                          XML_ElementDeclHandler eldecl)
{
  elementDeclHandler = eldecl;
}

void XMLCALL
XML_SetAttlistDeclHandler(XML_Parser parser,
                          XML_AttlistDeclHandler attdecl)
{
  attlistDeclHandler = attdecl;
}

void XMLCALL
XML_SetEntityDeclHandler(XML_Parser parser,
                         XML_EntityDeclHandler handler)
{
  entityDeclHandler = handler;
}

void XMLCALL
XML_SetXmlDeclHandler(XML_Parser parser,
                      XML_XmlDeclHandler handler) {
  xmlDeclHandler = handler;
}

int XMLCALL
XML_SetParamEntityParsing(XML_Parser parser,
                          enum XML_ParamEntityParsing peParsing)
{
  /* block after XML_Parse()/XML_ParseBuffer() has been called */
  if (parsing == XML_PARSING || parsing == XML_SUSPENDED)
    return 0;
#ifdef XML_DTD
  paramEntityParsing = peParsing;
  return 1;
#else
  return peParsing == XML_PARAM_ENTITY_PARSING_NEVER;
#endif
}

enum XML_Status XMLCALL
XML_Parse(XML_Parser parser, const char *s, int len, int isFinal)
{
  switch (parsing) {
  case XML_SUSPENDED:
    errorCode = XML_ERROR_SUSPENDED;
    return XML_STATUS_ERROR;
  case XML_FINISHED:
    errorCode = XML_ERROR_FINISHED;
    return XML_STATUS_ERROR;
  default:
    parsing = XML_PARSING;
  }

  if (len == 0) {
    finalBuffer = (XML_Bool)isFinal;
    if (!isFinal)
      return XML_STATUS_OK;
    positionPtr = bufferPtr;
    parseEndPtr = bufferEnd;

    /* If data are left over from last buffer, and we now know that these
       data are the final chunk of input, then we have to check them again
       to detect errors based on this information.
    */
    errorCode = processor(parser, bufferPtr, parseEndPtr, &bufferPtr);

    if (errorCode == XML_ERROR_NONE) {
      switch (parsing) {
      case XML_SUSPENDED:
        XmlUpdatePosition(encoding, positionPtr, bufferPtr, &position);
        positionPtr = bufferPtr;
        return XML_STATUS_SUSPENDED;
      case XML_INITIALIZED: 
      case XML_PARSING:
        parsing = XML_FINISHED;
        /* fall through */
      default:
        return XML_STATUS_OK;
      }
    }
    eventEndPtr = eventPtr;
    processor = errorProcessor;
    return XML_STATUS_ERROR;
  }
#ifndef XML_CONTEXT_BYTES
  else if (bufferPtr == bufferEnd) {
    const char *end;
    int nLeftOver;
    enum XML_Error result;
    parseEndByteIndex += len;
    positionPtr = s;
    finalBuffer = (XML_Bool)isFinal;

    errorCode = processor(parser, s, parseEndPtr = s + len, &end);

    if (errorCode != XML_ERROR_NONE) {
      eventEndPtr = eventPtr;
      processor = errorProcessor;
      return XML_STATUS_ERROR;
    }
    else {
      switch (parsing) {
      case XML_SUSPENDED:
        result = XML_STATUS_SUSPENDED;
        break;
      case XML_INITIALIZED:
      case XML_PARSING:
        result = XML_STATUS_OK;
        if (isFinal) {
          parsing = XML_FINISHED;
          return result;
        }
      }
    }

    XmlUpdatePosition(encoding, positionPtr, end, &position);
    positionPtr = end;
    nLeftOver = s + len - end;
    if (nLeftOver) {
      if (buffer == NULL || nLeftOver > bufferLim - buffer) {
        /* FIXME avoid integer overflow */
        char *temp;
        temp = (buffer == NULL
                ? (char *)MALLOC(len * 2)
                : (char *)REALLOC(buffer, len * 2));
        if (temp == NULL) {
          errorCode = XML_ERROR_NO_MEMORY;
          return XML_STATUS_ERROR;
        }
        buffer = temp;
        if (!buffer) {
          errorCode = XML_ERROR_NO_MEMORY;
          eventPtr = eventEndPtr = NULL;
          processor = errorProcessor;
          return XML_STATUS_ERROR;
        }
        bufferLim = buffer + len * 2;
      }
      memcpy(buffer, end, nLeftOver);
      bufferPtr = buffer;
      bufferEnd = buffer + nLeftOver;
    }
    return result;
  }
#endif  /* not defined XML_CONTEXT_BYTES */
  else {
    void *buff = XML_GetBuffer(parser, len);
    if (buff == NULL)
      return XML_STATUS_ERROR;
    else {
      memcpy(buff, s, len);
      return XML_ParseBuffer(parser, len, isFinal);
    }
  }
}

enum XML_Status XMLCALL
XML_ParseBuffer(XML_Parser parser, int len, int isFinal)
{
  const char *start;
  enum XML_Status result = XML_STATUS_OK;

  switch (parsing) {
  case XML_SUSPENDED:
    errorCode = XML_ERROR_SUSPENDED;
    return XML_STATUS_ERROR;
  case XML_FINISHED:
    errorCode = XML_ERROR_FINISHED;
    return XML_STATUS_ERROR;
  default:
    parsing = XML_PARSING;
  }

  start = bufferPtr;
  positionPtr = start;
  bufferEnd += len;
  parseEndPtr = bufferEnd;
  parseEndByteIndex += len;
  finalBuffer = (XML_Bool)isFinal;

  errorCode = processor(parser, start, parseEndPtr, &bufferPtr);

  if (errorCode != XML_ERROR_NONE) {
    eventEndPtr = eventPtr;
    processor = errorProcessor;
    return XML_STATUS_ERROR;
  }
  else {
    switch (parsing) {
    case XML_SUSPENDED:
      result = XML_STATUS_SUSPENDED;
      break;
    case XML_INITIALIZED: 
    case XML_PARSING:
      if (isFinal) {
        parsing = XML_FINISHED;
        return result;
      }
    default: ;  /* should not happen */
    }
  }

  XmlUpdatePosition(encoding, positionPtr, bufferPtr, &position);
  positionPtr = bufferPtr;
  return result;
}

void * XMLCALL
XML_GetBuffer(XML_Parser parser, int len)
{
  switch (parsing) {
  case XML_SUSPENDED:
    errorCode = XML_ERROR_SUSPENDED;
    return NULL;
  case XML_FINISHED:
    errorCode = XML_ERROR_FINISHED;
    return NULL;
  default: ;
  }

  if (len > bufferLim - bufferEnd) {
    /* FIXME avoid integer overflow */
    int neededSize = (int) (len + (bufferEnd - bufferPtr));
#ifdef XML_CONTEXT_BYTES
    int keep = (int) (bufferPtr - buffer);

    if (keep > XML_CONTEXT_BYTES)
      keep = XML_CONTEXT_BYTES;
    neededSize += keep;
#endif  /* defined XML_CONTEXT_BYTES */
    if (neededSize  <= bufferLim - buffer) {
#ifdef XML_CONTEXT_BYTES
      if (keep < bufferPtr - buffer) {
        int offset = (int) ((bufferPtr - buffer) - keep);
        memmove(buffer, &buffer[offset], bufferEnd - bufferPtr + keep);
        bufferEnd -= offset;
        bufferPtr -= offset;
      }
#else
      memmove(buffer, bufferPtr, bufferEnd - bufferPtr);
      bufferEnd = buffer + (bufferEnd - bufferPtr);
      bufferPtr = buffer;
#endif  /* not defined XML_CONTEXT_BYTES */
    }
    else {
      char *newBuf;
      int bufferSize = (int) (bufferLim - bufferPtr);
      if (bufferSize == 0)
        bufferSize = INIT_BUFFER_SIZE;
      do {
        bufferSize *= 2;
      } while (bufferSize < neededSize);
      newBuf = (char *)MALLOC(bufferSize);
      if (newBuf == 0) {
        errorCode = XML_ERROR_NO_MEMORY;
        return NULL;
      }
      bufferLim = newBuf + bufferSize;
#ifdef XML_CONTEXT_BYTES
      if (bufferPtr) {
        int keep = (int) (bufferPtr - buffer);
        if (keep > XML_CONTEXT_BYTES)
          keep = XML_CONTEXT_BYTES;
        memcpy(newBuf, &bufferPtr[-keep], bufferEnd - bufferPtr + keep);
        FREE(buffer);
        buffer = newBuf;
        bufferEnd = buffer + (bufferEnd - bufferPtr) + keep;
        bufferPtr = buffer + keep;
      }
      else {
        bufferEnd = newBuf + (bufferEnd - bufferPtr);
        bufferPtr = buffer = newBuf;
      }
#else
      if (bufferPtr) {
        memcpy(newBuf, bufferPtr, bufferEnd - bufferPtr);
        FREE(buffer);
      }
      bufferEnd = newBuf + (bufferEnd - bufferPtr);
      bufferPtr = buffer = newBuf;
#endif  /* not defined XML_CONTEXT_BYTES */
    }
  }
  return bufferEnd;
}

enum XML_Status XMLCALL
XML_StopParser(XML_Parser parser, XML_Bool resumable)
{
  switch (parsing) {
  case XML_SUSPENDED:
    if (resumable) {
      errorCode = XML_ERROR_SUSPENDED;
      return XML_STATUS_ERROR;
    }
    parsing = XML_FINISHED;
    break;
  case XML_FINISHED:
    errorCode = XML_ERROR_FINISHED;
    return XML_STATUS_ERROR;
  default:
    if (resumable) {
#ifdef XML_DTD
      if (isParamEntity) {
        errorCode = XML_ERROR_SUSPEND_PE;
        return XML_STATUS_ERROR;
      }
#endif
      parsing = XML_SUSPENDED;
    }
    else
      parsing = XML_FINISHED;
  }
  return XML_STATUS_OK;
}

enum XML_Status XMLCALL
XML_ResumeParser(XML_Parser parser)
{
  enum XML_Status result = XML_STATUS_OK;

  if (parsing != XML_SUSPENDED) {
    errorCode = XML_ERROR_NOT_SUSPENDED;
    return XML_STATUS_ERROR;
  }
  parsing = XML_PARSING;

  errorCode = processor(parser, bufferPtr, parseEndPtr, &bufferPtr);

  if (errorCode != XML_ERROR_NONE) {
    eventEndPtr = eventPtr;