Locate and position the current Audacity source code, and clear a variety of old junk out of the way into junk-branches

src/xml/XMLFileReader.cpp

@@ -0,0 +1,152 @@
+/**********************************************************************
+
+  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 "../Internat.h"
+#include "XMLFileReader.h"
+
+XMLFileReader::XMLFileReader()
+{
+   mParser = XML_ParserCreate(NULL);
+   XML_SetUserData(mParser, (void *)this);
+   XML_SetElementHandler(mParser, startElement, endElement);
+   XML_SetCharacterDataHandler(mParser, charHandler); 
+   mBaseHandler = NULL;
+   mMaxDepth = 128;
+   mHandler = new XMLTagHandler*[mMaxDepth];
+   mDepth = -1;
+   mErrorStr = wxT("");
+}
+
+XMLFileReader::~XMLFileReader()
+{
+   delete[] mHandler;
+   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.c_str());
+      return false;
+   }
+
+   mBaseHandler = baseHandler;
+   mHandler[0] = NULL;
+
+   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 (mHandler[0])
+      return true;
+   else {
+      mErrorStr.Printf(_("Could not load file: \"%s\""), fname.c_str());
+      return false;
+   }
+}
+
+wxString XMLFileReader::GetErrorStr()
+{
+   return mErrorStr;
+}
+
+// static
+void XMLFileReader::startElement(void *userData, const char *name,
+                                 const char **atts)
+{
+   XMLFileReader *This = (XMLFileReader *)userData;
+
+   This->mDepth++;
+
+   if (This->mDepth >= This->mMaxDepth) {
+      XMLTagHandler  **newHandler = new XMLTagHandler*[This->mMaxDepth*2];
+      for(int i=0; i<This->mMaxDepth; i++)
+         newHandler[i] = This->mHandler[i];
+      delete[] This->mHandler;
+      This->mHandler = newHandler;
+      This->mMaxDepth *= 2;
+   }
+
+   if (This->mDepth==0)
+      This->mHandler[This->mDepth] = This->mBaseHandler;
+   else {
+      if (This->mHandler[This->mDepth-1])
+         This->mHandler[This->mDepth] =
+            This->mHandler[This->mDepth-1]->ReadXMLChild(name);
+      else
+         This->mHandler[This->mDepth] = NULL;
+   }
+
+   if (This->mHandler[This->mDepth]) {
+      if (!This->mHandler[This->mDepth]->ReadXMLTag(name, atts))
+         This->mHandler[This->mDepth] = 0;
+   }
+}
+
+// static
+void XMLFileReader::endElement(void *userData, const char *name)
+{
+   XMLFileReader *This = (XMLFileReader *)userData;
+
+   if (This->mHandler[This->mDepth])
+      This->mHandler[This->mDepth]->ReadXMLEndTag(name);
+
+   This->mDepth--;
+}
+
+// static
+void XMLFileReader::charHandler(void *userData, const char *s, int len)
+{
+   XMLFileReader *This = (XMLFileReader *)userData;
+
+   if (This->mHandler[This->mDepth])
+      This->mHandler[This->mDepth]->ReadXMLContent(s, len);
+}
+
+// Indentation settings for Vim and Emacs and unique identifier for Arch, a
+// version control system. Please do not modify past this point.
+//
+// Local Variables:
+// c-basic-offset: 3
+// indent-tabs-mode: nil
+// End:
+//
+// vim: et sts=3 sw=3
+// arch-tag: 0a51946d-5a9f-46c9-92d9-ee09698a9bc3
+