131 lines
3.3 KiB
C++
131 lines
3.3 KiB
C++
/**********************************************************************
|
|
|
|
Audacity: A Digital Audio Editor
|
|
|
|
XMLFileReader.cpp
|
|
|
|
Dominic Mazzoni
|
|
|
|
*******************************************************************//**
|
|
|
|
\class XMLFileReader
|
|
\brief Reads a file and passes the results through an XMLTagHandler.
|
|
|
|
*//*******************************************************************/
|
|
|
|
#include <wx/defs.h>
|
|
#include <wx/ffile.h>
|
|
#include <wx/intl.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include "XMLFileReader.h"
|
|
#include "../Internat.h"
|
|
|
|
XMLFileReader::XMLFileReader()
|
|
{
|
|
mParser = XML_ParserCreate(NULL);
|
|
XML_SetUserData(mParser, (void *)this);
|
|
XML_SetElementHandler(mParser, startElement, endElement);
|
|
XML_SetCharacterDataHandler(mParser, charHandler);
|
|
mBaseHandler = NULL;
|
|
mHandler.reserve(128);
|
|
}
|
|
|
|
XMLFileReader::~XMLFileReader()
|
|
{
|
|
XML_ParserFree(mParser);
|
|
}
|
|
|
|
bool XMLFileReader::Parse(XMLTagHandler *baseHandler,
|
|
const wxString &fname)
|
|
{
|
|
wxFFile theXMLFile(fname, wxT("rb"));
|
|
if (!theXMLFile.IsOpened()) {
|
|
mErrorStr.Printf(_("Could not open file: \"%s\""), fname);
|
|
return false;
|
|
}
|
|
|
|
mBaseHandler = baseHandler;
|
|
|
|
const size_t bufferSize = 16384;
|
|
char buffer[16384];
|
|
int done = 0;
|
|
do {
|
|
size_t len = fread(buffer, 1, bufferSize, theXMLFile.fp());
|
|
done = (len < bufferSize);
|
|
if (!XML_Parse(mParser, buffer, len, done)) {
|
|
mErrorStr.Printf(_("Error: %hs at line %lu"),
|
|
XML_ErrorString(XML_GetErrorCode(mParser)),
|
|
(long unsigned int)XML_GetCurrentLineNumber(mParser));
|
|
theXMLFile.Close();
|
|
return false;
|
|
}
|
|
} while (!done);
|
|
|
|
theXMLFile.Close();
|
|
|
|
// Even though there were no parse errors, we only succeed if
|
|
// the first-level handler actually got called, and didn't
|
|
// return false.
|
|
if (mBaseHandler)
|
|
return true;
|
|
else {
|
|
mErrorStr.Printf(_("Could not load file: \"%s\""), fname);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
wxString XMLFileReader::GetErrorStr()
|
|
{
|
|
return mErrorStr;
|
|
}
|
|
|
|
// static
|
|
void XMLFileReader::startElement(void *userData, const char *name,
|
|
const char **atts)
|
|
{
|
|
XMLFileReader *This = (XMLFileReader *)userData;
|
|
Handlers &handlers = This->mHandler;
|
|
|
|
if (handlers.empty()) {
|
|
handlers.push_back(This->mBaseHandler);
|
|
}
|
|
else {
|
|
if (XMLTagHandler *const handler = handlers.back())
|
|
handlers.push_back(handler->ReadXMLChild(name));
|
|
else
|
|
handlers.push_back(NULL);
|
|
}
|
|
|
|
if (XMLTagHandler *& handler = handlers.back()) {
|
|
if (!handler->ReadXMLTag(name, atts)) {
|
|
handler = nullptr;
|
|
if (handlers.size() == 1)
|
|
This->mBaseHandler = nullptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
// static
|
|
void XMLFileReader::endElement(void *userData, const char *name)
|
|
{
|
|
XMLFileReader *This = (XMLFileReader *)userData;
|
|
Handlers &handlers = This->mHandler;
|
|
|
|
if (XMLTagHandler *const handler = handlers.back())
|
|
handler->ReadXMLEndTag(name);
|
|
|
|
handlers.pop_back();
|
|
}
|
|
|
|
// static
|
|
void XMLFileReader::charHandler(void *userData, const char *s, int len)
|
|
{
|
|
XMLFileReader *This = (XMLFileReader *)userData;
|
|
Handlers &handlers = This->mHandler;
|
|
|
|
if (XMLTagHandler *const handler = handlers.back())
|
|
handler->ReadXMLContent(s, len);
|
|
}
|