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