winamp/Src/filereader/ResourceReader.cpp

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2024-09-24 12:54:57 +00:00
#include "ResourceReader.h"
ResourceReader::ResourceReader() : data(NULL), g(NULL), ptr(0)
{}
int ResourceReader::open(const wchar_t *filename, int mode)
{
if (_wcsnicmp(filename, L"res://", 6)) return 0;
filename += 6;
wchar_t blah[MAX_PATH];
lstrcpynW(blah, filename, MAX_PATH);
wchar_t *p = blah;
while (p && *p && *p != ',') p++;
if (p && *p != ',') return 0;
if (p) *p++ = 0;
HINSTANCE hInst = (HINSTANCE)_wtoi64(blah);
int id = _wtoi(p);
HRSRC r = FindResource(hInst, MAKEINTRESOURCE(id), RT_RCDATA);
if (r == NULL) return 0;
g = LoadResource(hInst, r);
if (g == NULL) return 0;
data = (char*)LockResource(g);
if (data == NULL)
{
FreeResource(g); // see win32 doc
g = NULL;
return 0;
}
size = SizeofResource(hInst, r);
ptr = 0;
return 1;
}
size_t ResourceReader::read(__int8 *buffer, size_t length)
{
size_t s = min(size - ptr, length);
if (s)
memcpy(buffer, data + ptr, s);
ptr += s;
return s;
}
size_t ResourceReader::write(const __int8 *buffer, size_t length)
{
return 0;
}
void ResourceReader::close()
{
if (g)
{
UnlockResource(g);
FreeResource(g); // see win32 doc
g = NULL;
data = NULL;
}
}
unsigned __int64 ResourceReader::getPos()
{
return ptr;
}
unsigned __int64 ResourceReader::getLength()
{
return size;
}
int ResourceReader::canSeek()
{
return 1;
}
int ResourceReader::seek(unsigned __int64 position)
{
ptr = (size_t)min(position, size);
return 1;
}
int ResourceReader::exists(const wchar_t *filename)
{
return 1;
} // always exists if open succeeded
#define CBCLASS ResourceReader
START_DISPATCH;
// CB(ISMINE, isMine);
CB(OPEN, open);
CB(READ, read);
CB(WRITE, write);
VCB(CLOSE, close);
// VCB(ABORT, abort);
CB(GETLENGTH, getLength);
CB(GETPOS, getPos);
CB(CANSEEK, canSeek);
// CB(SEEK, seek);
// CB(HASHEADERS,hasHeaders);
// CB(GETHEADER,getHeader);
CB(EXISTS,exists);
// CB(REMOVE,remove);
// CB(REMOVEUNDOABLE,removeUndoable);
// CB(MOVE,move);
// CB(BYTESAVAILABLE,bytesAvailable);
// VCB(SETMETADATACALLBACK,setMetaDataCallback);
// CB(CANPREFETCH,canPrefetch);
// CB(CANSETEOF, canSetEOF);
// CB(SETEOF, setEOF);
END_DISPATCH;
#undef CBCLASS