github publish

DDLReader/DDLFile.cpp

@@ -0,0 +1,93 @@
+#include "stdafx.h"
+#include ".\ddlfile.h"
+
+DDLFile::DDLFile(void)
+{
+  _hFile=0;
+}
+
+DDLFile::~DDLFile(void)
+{
+  if (_hFile!=0) CloseHandle(_hFile);
+}
+
+
+
+
+bool DDLFile::OpenDDLFile(WString filename)
+{
+  _hFile=CreateFile(filename,GENERIC_READ,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,
+    OPEN_EXISTING,FILE_FLAG_RANDOM_ACCESS,NULL);
+  if (_hFile==INVALID_HANDLE_VALUE) 
+  {
+    _hFile=0;
+    return false;
+  }
+  return true;
+}
+
+bool DDLFile::ReadFile(void *data, size_t sz)
+{
+  DWORD readed=0;
+  if (::ReadFile(_hFile,data,sz,&readed,NULL)==FALSE) return false;
+  if (readed!=sz) return false;
+  return true;
+}
+
+bool DDLFile::EnumFiles(IDDLFileEnumerator &enmClass)
+{
+  unsigned long firstGroup;
+  unsigned long groupEndOffset;
+  unsigned long endGroups;
+  int i;
+  int ngroups;
+  SetFilePointer(_hFile,0,0,FILE_BEGIN);
+  if (ReadFile(&firstGroup,sizeof(firstGroup))==false) return false;
+  if (ReadFile(&groupEndOffset,sizeof(firstGroup))==false) return false;
+  unsigned long *group=(unsigned long *)alloca(groupEndOffset);
+  group[0]=firstGroup;
+  group[1]=groupEndOffset;
+  ngroups=groupEndOffset/8;
+  if (groupEndOffset!=8 && ReadFile(group+2,groupEndOffset-8)==false) return false;
+  SetFilePointer(_hFile,12,0,FILE_CURRENT);
+  if (ReadFile(&endGroups,sizeof(endGroups))==false) return false;
+  for (i=0;i<ngroups && group[i*2+1]<endGroups;i++);
+  ngroups=i;
+  WString fname;
+  for (i=0;i<ngroups;i++)
+  {
+    unsigned long endGroup=(i+1)<ngroups?group[i*2+3]:endGroups;
+    SetFilePointer(_hFile,group[i*2+1],0,FILE_BEGIN);
+    unsigned long pos=group[i*2+1];
+    while (pos<endGroup)
+    {
+      char buff[13];
+      unsigned long offset;
+      if (ReadFile(buff,12)==false) return false;
+      if (ReadFile(&offset,4)==false) return false;
+      buff[12]=0;
+      fname.SetUTF8(buff);
+      enmClass.File(fname,group[i*2],offset);
+      pos+=12+4;
+    }
+  }
+  return true;
+}
+
+unsigned long DDLFile::GetFileSize(unsigned long offset)
+{
+  unsigned long sz=0;
+  SetFilePointer(_hFile,offset,0,FILE_BEGIN);
+  ReadFile(&sz,4);
+  return sz;
+}
+
+DDLData DDLFile::ExtractFile(unsigned long offset)
+{
+  SetFilePointer(_hFile,offset,0,FILE_BEGIN);
+  DDLData data;
+  if (ReadFile(&data.sz,4)==false) return DDLData();
+  data.data=malloc(data.sz);
+  if (ReadFile(data.data,data.sz)==false) return DDLData();
+  return data;
+}