CachedFileStream::CachedFileStream(const char* stream, bool autoFree)
{
ExtractFileFromPath( filename, stream );
PathJoin( originalfile, core->CachePath, filename, NULL );
str = _fopen( originalfile, "rb" );
if (str == NULL) { // File was not found in cache
if (core->GameOnCD) {
_FILE* src = _fopen( stream, "rb" );
#ifdef _DEBUG
core->CachedFileStreamPtrCount++;
#endif
_FILE* dest = _fopen( originalfile, "wb" );
#ifdef _DEBUG
core->CachedFileStreamPtrCount++;
#endif
void* buff = malloc( 1024 * 1000 );
do {
size_t len = _fread( buff, 1, 1024 * 1000, src );
size_t c = _fwrite( buff, 1, len, dest );
if (c != len) {
printf("CachedFileStream failed to write to cached file '%s' (from '%s')\n", originalfile, stream);
abort();
}
} while (!_feof( src ));
free( buff );
_fclose( src );
#ifdef _DEBUG
core->CachedFileStreamPtrCount--;
#endif
_fclose( dest );
#ifdef _DEBUG
core->CachedFileStreamPtrCount--;
#endif
} else { // Don't cache files already on hdd
strncpy(originalfile, stream, _MAX_PATH);
}
str = _fopen( originalfile, "rb" );
}
#ifdef _DEBUG
core->CachedFileStreamPtrCount++;
#endif
startpos = 0;
_fseek( str, 0, SEEK_END );
size = _ftell( str );
_fseek( str, 0, SEEK_SET );
Pos = 0;
this->autoFree = autoFree;
}
/*!
\param Option
*/
xbShort xbDbf::GetDbtHeader( xbShort Option )
{
char *p;
xbShort i;
char MemoBlock[24];
/* Option = 0 --> read only first four bytes
1 --> read the entire thing */
if( !mfp )
return XB_NOT_OPEN;
if( _fseek( mfp, 0, SEEK_SET ))
return XB_SEEK_ERROR;
if(( fread( MemoBlock, 24, 1, mfp )) != 1 )
return XB_READ_ERROR;
p = MemoBlock;
MemoHeader.NextBlock = xbase->GetLong( p );
if(IsType3Dbt() || Option == 0)
return XB_NO_ERROR;
/* version IV stuff follows */
p+=8;
for( i = 0; i < 8; i++, p++ )
MemoHeader.FileName[i] = *p;
MemoHeader.Version = *p;
p+=4;
MemoHeader.BlockSize = xbase->GetShort( p );
return XB_NO_ERROR;
}
// Calculate number of additional pages required to be allocated on heap by bootloader.
Result CalcRequiredAllocSizeFor3DSX(Handle file, u32* numOut)
{
_fseek(file, 0x0, SEEK_SET);
_3DSX_Header hdr;
if (_fread(&hdr, sizeof(hdr), file) != 0)
return -1;
if (hdr.magic != _3DSX_MAGIC)
return -2;
_3DSX_LoadInfo d;
d.segSizes[0] = (hdr.codeSegSize+0xFFF) &~ 0xFFF;
SEC_ASSERT(d.segSizes[0] >= hdr.codeSegSize); // int overflow
d.segSizes[1] = (hdr.rodataSegSize+0xFFF) &~ 0xFFF;
SEC_ASSERT(d.segSizes[1] >= hdr.rodataSegSize); // int overflow
d.segSizes[2] = (hdr.dataSegSize+0xFFF) &~ 0xFFF;
SEC_ASSERT(d.segSizes[2] >= hdr.dataSegSize); // int overflow
// Calculate # of pages required.
u32 pagesRequired = d.segSizes[0]/0x1000 + d.segSizes[1]/0x1000 + d.segSizes[2]/0x1000; // XXX: int overflow
if(pagesRequired > CN_TOTAL3DSXPAGES)
*numOut = pagesRequired - CN_TOTAL3DSXPAGES + 1;
else
*numOut = 0;
//svc_closeHandle(file);
return 0;
}
xbShort xbDbf::ReadMemoBlock( xbLong BlockNo, xbShort Option )
{
size_t ReadSize;
CurMemoBlockNo = -1;
if( BlockNo < 1L )
return XB_INVALID_BLOCK_NO;
if( _fseek( mfp,((xbOffT)BlockNo*MemoHeader.BlockSize), SEEK_SET ))
return XB_SEEK_ERROR;
if( Option == 0 || Option == 1 )
ReadSize = MemoHeader.BlockSize;
else
ReadSize = 8L;
if(fread( mbb, ReadSize, 1, mfp ) != 1 )
return XB_READ_ERROR;
if( Option == 0 || Option == 4){ // 1st block of a set of valid data blocks
mfield1 = xbase->GetShort( (char *) mbb );
MStartPos = xbase->GetShort( (char *) mbb+2 );
MFieldLen = xbase->GetLong ( (char *) mbb+4 );
}
else if( Option == 2 ){ // 1st block of a set of free blocks
NextFreeBlock = xbase->GetLong( (char *) mbb );
FreeBlockCnt = xbase->GetLong( (char *) mbb+4 );
}
if( Option == 0 || Option == 1 )
CurMemoBlockNo = BlockNo;
return XB_NO_ERROR;
}
CachedFileStream::CachedFileStream(CachedFileStream* cfs, int startpos,
int size, bool autoFree)
{
this->size = size;
this->startpos = startpos;
this->autoFree = autoFree;
char cpath[_MAX_PATH];
PathJoin( cpath, core->CachePath, cfs->filename, NULL );
str = _fopen( cpath, "rb" );
if (str == NULL) {
str = _fopen( cfs->originalfile, "rb" );
if (str == NULL) {
printf( "Can't open stream (maybe leaking?)\n" );
return;
}
strncpy( originalfile, cfs->originalfile, sizeof(originalfile) );
strncpy( filename, cfs->filename, sizeof(filename) );
} else {
strncpy( originalfile, cpath, sizeof(originalfile) );
strncpy( filename, cfs->filename, sizeof(filename) );
}
#ifdef _DEBUG
core->CachedFileStreamPtrCount++;
#endif
_fseek( str, startpos, SEEK_SET );
Pos = 0;
}
/* A portable fseek() function
return 0 on success, non-zero on failure (with errno set) */
int my_fseek (FILE *fp, my_off_t offset, int whence) {
#if defined (HAVE_FSEEKO) && SIZEOF_OFF_T >= 8
return fseeko(fp, offset, whence);
#elif defined (HAVE_FSEEK64)
return fseek64(fp, offset, whence);
#elif defined (__BEOS__)
return _fseek(fp, offset, whence);
#elif SIZEOF_FPOS_T >= 8
/* lacking a 64-bit capable fseek(), use a 64-bit capable fsetpos()
and fgetpos() to implement fseek()*/
fpos_t pos;
switch (whence) {
case SEEK_END:
#ifdef MS_WINDOWS
fflush (fp);
if (_lseeki64 (fileno(fp), 0, 2) == -1)
return -1;
#else
if (fseek (fp, 0, SEEK_END) != 0)
return -1;
#endif
/* fall through */
case SEEK_CUR:
if (fgetpos (fp, &pos) != 0)
return -1;
offset += pos;
break;
/* case SEEK_SET: break; */
}
return fsetpos(fp, &offset);
#else
#error "Large file support, but no way to fseek."
#endif
}
/*!
*/
xbShort xbDbf::OpenMemoFile()
{
if (Version == (char)0xf5 || Version == (char)0x30)
return OpenFPTFile();
xbShort len, rc;
xbOffT Size, NewSize, l;
MemofileName = GetFileName();
len = GetFileName().len() - 1;
if( MemofileName[len] == 'F' )
MemofileName.putAt(len, 'T');
else if( MemofileName[len] == 'f' )
MemofileName.putAt(len, 't');
else
return XB_INVALID_NAME;
if(( mfp = fopen( MemofileName, "r+b" )) == NULL ){
//
// Try to open read only if can't open read/write
//
if(( mfp = fopen( MemofileName, "rb" )) == NULL )
return XB_OPEN_ERROR;
}
#ifdef XB_LOCKING_ON
setbuf( mfp, NULL );
#endif
if(( rc = GetDbtHeader(1)) != 0 ){
fclose( mfp );
return rc;
}
len = GetMemoBlockSize();
if( len == 0 || ((len % 512) != 0 )){
fclose( mfp );
return XB_INVALID_BLOCK_SIZE;
}
/* logic to verify file size is a multiple of block size */
if(( rc = _fseek( mfp, 0, SEEK_END )) != 0 ){
fclose( mfp );
return XB_SEEK_ERROR;
}
/* if the file is not a multiple of block size, fix it, append nulls */
Size = _ftell( mfp );
if(( Size % MemoHeader.BlockSize ) != 0 ){
NewSize = ( Size / MemoHeader.BlockSize + 1) * MemoHeader.BlockSize;
for( l = Size; l < NewSize; l++ )
fputc( 0x00, mfp );
}
if(( mbb = (void *) malloc(len)) == NULL ){
fclose( mfp );
return XB_NO_MEMORY;
}
return XB_NO_ERROR;
}
/*!
*/
xbShort xbDbf::UpdateHeadNextNode() const
{
char buf[4];
memset( buf, 0x00, 4 );
xbase->PutLong( buf, MemoHeader.NextBlock );
if(( _fseek( mfp, 0, SEEK_SET )) != 0 )
return XB_SEEK_ERROR;
if(( fwrite( &buf, 4, 1, mfp )) != 1 )
return XB_WRITE_ERROR;
return XB_NO_ERROR;
}
/*!
\param FieldNo
*/
xbLong xbDbf::GetFPTFieldLen( xbShort FieldNo )
{
xbLong BlockNo;
if(( BlockNo = GetLongField(FieldNo)) == 0L )
return 0L;
// Seek to start_of_block + 4
if(_fseek(mfp, ((xbOffT)BlockNo * MemoHeader.BlockSize + 4), SEEK_SET) != 0)
return XB_SEEK_ERROR;
char h[4];
if((fread(h, 4, 1, mfp)) != 1)
return XB_READ_ERROR;
return xbase->GetHBFULong(h);
}
int CachedFileStream::Seek(int newpos, int type)
{
switch (type) {
case GEM_CURRENT_POS:
_fseek( str, newpos, SEEK_CUR );
Pos += newpos;
break;
case GEM_STREAM_START:
_fseek( str, startpos + newpos, SEEK_SET );
Pos = newpos;
break;
default:
return GEM_ERROR;
}
//we went past the buffer
if (Pos>size) {
printf("[Streams]: Invalid seek position: %ld (limit: %ld)\n",Pos, size);
return GEM_ERROR;
}
return GEM_OK;
}
int fseek ( FILE * stream, long int offset, int origin )
{
//printf("INTERCEPTED fseek\n");
clock_t start = clock();
int ret = _fseek(stream,offset,origin);
clock_t end = clock();
double called_time = (double)(start-program_start)/(double)(CLOCKS_PER_SEC);
double exec_time = (double)(end-start)/(double)(CLOCKS_PER_SEC);
fprintf(logFile,"%lf %lf fseek %p %ld %d = %d\n",called_time,exec_time,stream,offset,origin,ret);
return ret;
}
/*!
\param BlockNo
\param Option
*/
xbShort xbDbf::WriteMemoBlock( xbLong BlockNo, xbShort Option )
{
/* Option = 0 - 1st Block of a set of valid data blocks, set buckets */
/* Option = 1 - subsequant block of data in a multi block set or db III */
/* Option = 2 - 1st block of a set offree blocks, set buckets */
xbLong WriteSize;
if( BlockNo < 1L )
return XB_INVALID_BLOCK_NO;
CurMemoBlockNo = -1;
if( Option == 0 ){
xbase->PutShort( (char *) mbb, mfield1 );
xbase->PutShort( (char *) mbb+2, MStartPos );
xbase->PutLong ( (char *) mbb+4, MFieldLen );
WriteSize = MemoHeader.BlockSize;
}
else if( Option == 2 ){
xbase->PutLong((char *) mbb, NextFreeBlock );
xbase->PutLong((char *) mbb+4, FreeBlockCnt );
WriteSize = 8L;
}
else
WriteSize = MemoHeader.BlockSize;
if( _fseek( mfp,((xbOffT)BlockNo*MemoHeader.BlockSize), SEEK_SET ))
return XB_SEEK_ERROR;
if(( fwrite( mbb, WriteSize, 1, mfp )) != 1 )
return XB_WRITE_ERROR;
if( Option == 0 || Option == 1 )
CurMemoBlockNo = BlockNo;
return XB_NO_ERROR;
}
/*!
*/
xbLong xbDbf::CalcLastDataBlock()
{
if( _fseek( mfp, 0, SEEK_END ) != 0 )
return XB_SEEK_ERROR;
return ( _ftell( mfp ) / MemoHeader.BlockSize );
}
/*!
\param FieldNo
\param len
\param Buf
\param LockOpt
*/
xbShort xbDbf::GetFPTField(xbShort FieldNo, xbLong len,
char * Buf, xbShort LockOpt) {
if (FieldNo < 0 || FieldNo > (NoOfFields - 1))
return XB_INVALID_FIELDNO;
if (GetFieldType(FieldNo) != 'M')
return XB_NOT_MEMO_FIELD;
#ifdef XB_LOCKING_ON
// if( LockOpt != -1 )
// if( LockMemoFile( XB_LOCK ) != XB_NO_ERROR )
// return XB_LOCK_FAILED;
#endif
xbLong BlockNo;
char buf[18];
if( Version == (char)0x30 ) {
memset( buf, 0x00, 18 ) ;
GetField( FieldNo, buf );
BlockNo = xbase->GetLong((char*) buf);
} else {
BlockNo = GetLongField(FieldNo);
}
if ( BlockNo == 0L )
return 0L;
// Seek to start_of_block + 4
// FIXME LOCK
#ifdef XB_LOCKING_ON
// try {
#endif
if (_fseek(mfp, ((xbOffT)BlockNo * MemoHeader.BlockSize + 4), SEEK_SET) != 0)
return XB_SEEK_ERROR;
char h[4];
if ((fread(h, 4, 1, mfp)) != 1)
return XB_READ_ERROR;
xbULong fLen = xbase->GetHBFULong(h);
xbULong l = (fLen < (xbULong)len) ? fLen : len;
if ((fread(Buf, l, 1, mfp)) != 1)
return XB_READ_ERROR;
Buf[l]=0;
#ifdef XB_LOCKING_ON
// }
// catch (...) {
// if (LockOpt != -1)
// LockMemoFile( XB_UNLOCK );
// throw;
// }
#endif
#ifdef XB_LOCKING_ON
// if (LockOpt != -1)
// LockMemoFile( XB_UNLOCK );
#endif
return XB_NO_ERROR;
}
int Load3DSX(Handle file, Handle process, void* baseAddr, u32 heapAddr)
{
// Extra heap must be deallocated before loading a new 3DSX.
if(hasExtraHeap)
return -5;
u32 i, j, k, m;
u32 endAddr = 0x00100000+CN_NEWTOTALPAGES*0x1000;
SEC_ASSERT(baseAddr >= (void*)0x00100000);
SEC_ASSERT((((u32) baseAddr) & 0xFFF) == 0); // page alignment
_fseek(file, 0x0, SEEK_SET);
_3DSX_Header hdr;
if (_fread(&hdr, sizeof(hdr), file) != 0)
return -1;
if (hdr.magic != _3DSX_MAGIC)
return -2;
_3DSX_LoadInfo d;
d.segSizes[0] = (hdr.codeSegSize+0xFFF) &~ 0xFFF;
SEC_ASSERT(d.segSizes[0] >= hdr.codeSegSize); // int overflow
d.segSizes[1] = (hdr.rodataSegSize+0xFFF) &~ 0xFFF;
SEC_ASSERT(d.segSizes[1] >= hdr.rodataSegSize); // int overflow
d.segSizes[2] = (hdr.dataSegSize+0xFFF) &~ 0xFFF;
SEC_ASSERT(d.segSizes[2] >= hdr.dataSegSize); // int overflow
// Map extra heap.
u32 pagesRequired = d.segSizes[0]/0x1000 + d.segSizes[1]/0x1000 + d.segSizes[2]/0x1000; // XXX: int overflow
u32 extendedPagesSize = 0;
if(pagesRequired > CN_TOTAL3DSXPAGES)
{
if(svc_unmapProcessMemory(process, 0x00100000, 0x02000000))return -12;
u32 extendedPages = pagesRequired - CN_TOTAL3DSXPAGES + 1;
u32 i;
for(i=0; i<extendedPages; i++)
{
if(svc_controlProcessMemory(process, endAddr+i*0x1000, heapAddr+i*0x1000, 0x1000, MEMOP_MAP, 0x7))
return -4;
}
if(svc_controlProcessMemory(process, heapAddr, 0, extendedPages*0x1000, MEMOP_PROTECT, 0x1))
return -5;
processHandle = process;
hasExtraHeap = 1;
extraHeapAddr = heapAddr;
extraHeapPages = extendedPages;
extendedPagesSize = extraHeapPages*0x1000;
endAddr += extendedPagesSize;
if(svc_mapProcessMemory(process, 0x00100000, 0x02000000))return -13;
}
u32 offsets[2] = { d.segSizes[0], d.segSizes[0] + d.segSizes[1] };
d.segPtrs[0] = baseAddr;
d.segPtrs[1] = (char*)d.segPtrs[0] + d.segSizes[0];
SEC_ASSERT((u32)d.segPtrs[1] >= d.segSizes[0]); // int overflow
d.segPtrs[2] = (char*)d.segPtrs[1] + d.segSizes[1];
SEC_ASSERT((u32)d.segPtrs[2] >= d.segSizes[1]); // int overflow
SEC_ASSERT((u32)d.segPtrs[2] < endAddr); // within user memory
// Skip header for future compatibility.
_fseek(file, hdr.headerSize, SEEK_SET);
// Read the relocation headers
SEC_ASSERT(hdr.dataSegSize >= hdr.bssSize); // int underflow
u32* relocs = (u32*)((char*)d.segPtrs[2] + hdr.dataSegSize - hdr.bssSize);
SEC_ASSERT((u32)relocs >= (u32)d.segPtrs[2]); // int overflow
SEC_ASSERT((u32)relocs < endAddr); // within user memory
u32 nRelocTables = hdr.relocHdrSize/4;
u32 relocsEnd = (u32)(relocs + 3*nRelocTables);
SEC_ASSERT((u32)relocsEnd >= (u32)relocs); // int overflow
SEC_ASSERT((u32)relocsEnd < endAddr); // within user memory
// XXX: Ensure enough RW pages exist at baseAddr to hold a memory block of length "totalSize".
// This also checks whether the memory region overflows into IPC data or loader data.
for (i = 0; i < 3; i ++)
if (_fread(&relocs[i*nRelocTables], nRelocTables*4, file) != 0)
return -3;
// Read the segments
if (_fread(d.segPtrs[0], hdr.codeSegSize, file) != 0) return -4;
if (_fread(d.segPtrs[1], hdr.rodataSegSize, file) != 0) return -5;
if (_fread(d.segPtrs[2], hdr.dataSegSize - hdr.bssSize, file) != 0) return -6;
// Relocate the segments
for (i = 0; i < 3; i ++)
{
for (j = 0; j < nRelocTables; j ++)
{
u32 nRelocs = relocs[i*nRelocTables+j];
if (j >= 2)
{
// We are not using this table - ignore it
_fseek(file, nRelocs*sizeof(_3DSX_Reloc), SEEK_CUR);
continue;
}
static _3DSX_Reloc relocTbl[RELOCBUFSIZE];
u32* pos = (u32*)d.segPtrs[i];
u32* endPos = pos + (d.segSizes[i]/4);
SEC_ASSERT(((u32) endPos) < endAddr); // within user memory
while (nRelocs)
{
u32 toDo = nRelocs > RELOCBUFSIZE ? RELOCBUFSIZE : nRelocs;
nRelocs -= toDo;
if (_fread(relocTbl, toDo*sizeof(_3DSX_Reloc), file) != 0)
return -7;
for (k = 0; k < toDo && pos < endPos; k ++)
{
pos += relocTbl[k].skip;
u32 num_patches = relocTbl[k].patch;
for (m = 0; m < num_patches && pos < endPos; m ++)
{
void* addr = TranslateAddr(*pos, &d, offsets);
SEC_ASSERT(((u32) pos) < endAddr); // within user memory
switch (j)
{
case 0: *pos = (u32)addr; break;
case 1: *pos = (int)addr - (int)pos; break;
}
pos++;
}
}
}
}
}
// Detect and fill _prm structure
u32* prmStruct = (u32*)baseAddr + 1;
if(prmStruct[0]==0x6D72705F)
{
// Write service handle table pointer
// the actual structure has to be filled out by cn_bootloader
prmStruct[1] = (u32)__service_ptr;
// XXX: other fields that need filling:
// prmStruct[2] <-- __apt_appid (default: 0x300)
// prmStruct[3] <-- __heap_size (default: 24*1024*1024)
// prmStruct[4] <-- __gsp_heap_size (default: 32*1024*1024)
// prmStruct[5] <-- __system_arglist (default: NULL)
prmStruct[2] = 0x300;
prmStruct[3] = 29*1024*1024 - extendedPagesSize;
prmStruct[4] = 32*1024*1024;
prmStruct[5] = CN_ARGCV_LOC;
prmStruct[6] = RUNFLAG_APTWORKAROUND; //__system_runflags
// XXX: Notes on __system_arglist:
// Contains a pointer to a u32 specifying the number of arguments immediately followed
// by the NULL-terminated argument strings themselves (no pointers). The first argument
// should always be the path to the file we are booting. Example:
// \x02\x00\x00\x00sd:/dir/file.3dsx\x00Argument1\x00
// Above corresponds to { "sd:/dir/file.3dsx", "Argument1" }.
}
// Protect memory at d.segPtrs[0] as CODE (r-x) -- npages = d.segSizes[0] / 0x1000
for(i=0;i<d.segSizes[0]>>12;i++)svc_controlProcessMemory(process, (u32)d.segPtrs[0]+i*0x1000, 0x0, 0x00001000, MEMOP_PROTECT, 0x5);
// Protect memory at d.segPtrs[1] as RODATA (r--) -- npages = d.segSizes[1] / 0x1000
for(i=0;i<d.segSizes[1]>>12;i++)svc_controlProcessMemory(process, (u32)d.segPtrs[1]+i*0x1000, 0x0, 0x00001000, MEMOP_PROTECT, 0x1);
// Protect memory at d.segPtrs[2] as DATA (rw-) -- npages = d.segSizes[2] / 0x1000
for(i=0;i<d.segSizes[2]>>12;i++)svc_controlProcessMemory(process, (u32)d.segPtrs[2]+i*0x1000, 0x0, 0x00001000, MEMOP_PROTECT, 0x3);
//svc_closeHandle(process); TODO
//svc_closeHandle(file);
return 0; // Success.
}
/*!
*/
xbShort xbDbf::CreateMemoFile( void )
{
xbShort len,i;
char *sp;
char buf[4];
len = GetMemoBlockSize();
if( len == 0 || len % 512 != 0 )
return XB_INVALID_BLOCK_SIZE;
if(( sp = (char*)strrchr(GetFileName(), PATH_SEPARATOR)) != NULL )
sp++;
else
sp = MemoHeader.FileName;
memset( MemoHeader.FileName, 0x00, 8 );
for( i = 0; i < 8 && *sp != '.'; i++ )
MemoHeader.FileName[i] = *sp++;
MemofileName = GetFileName();
len = GetFileName().len() - 1;
if( MemofileName[len] == 'F' )
MemofileName.putAt(len, 'T');
else if( MemofileName[len] == 'f' )
MemofileName.putAt(len, 't');
else
return XB_INVALID_NAME;
/* Initialize the variables */
MemoHeader.NextBlock = 1L;
if(( mfp = fopen( MemofileName, "w+b" )) == NULL )
return XB_OPEN_ERROR;
#ifdef XB_LOCKING_ON
setbuf( mfp, NULL );
#endif
if(( _fseek( mfp, 0, SEEK_SET )) != 0 ){
fclose( mfp );
return XB_SEEK_ERROR;
}
memset( buf, 0x00, 4 );
xbase->PutLong( buf, MemoHeader.NextBlock );
if(( fwrite( &buf, 4, 1, mfp )) != 1 ){
fclose( mfp );
return XB_WRITE_ERROR;
}
if( IsType3Dbt() ){ /* dBASE III+ */
for( i = 0; i < 12; i++ ) fputc( 0x00, mfp );
fputc( 0x03, mfp );
for( i = 0; i < 495; i++ ) fputc( 0x00, mfp );
}
else
{
for( i = 0; i < 4; i++ ) fputc( 0x00, mfp );
fwrite( &MemoHeader.FileName, 8, 1, mfp );
for( i = 0; i < 4; i++ ) fputc( 0x00, mfp );
memset( buf, 0x00, 2 );
xbase->PutShort( buf, MemoHeader.BlockSize );
if(( fwrite( &buf, 2, 1, mfp )) != 1 ){
fclose( mfp );
return XB_WRITE_ERROR;
}
for( i = 22; i < MemoHeader.BlockSize; i++ ) fputc( 0x00, mfp );
}
if(( mbb = (void *) malloc( MemoHeader.BlockSize )) == NULL ){
fclose( mfp );
return XB_NO_MEMORY;
}
return XB_NO_ERROR;
}
static INT
PAL_RNGReadFrame(
LPBYTE lpBuffer,
UINT uiBufferSize,
UINT uiRngNum,
UINT uiFrameNum,
FILE *fpRngMKF
)
/*++
Purpose:
Read a frame from a RNG animation.
Parameters:
[OUT] lpBuffer - pointer to the destination buffer.
[IN] uiBufferSize - size of the destination buffer.
[IN] uiRngNum - the number of the RNG animation in the MKF archive.
[IN] uiFrameNum - frame number in the RNG animation.
[IN] fpRngMKF - pointer to the fopen'ed MKF file.
Return value:
Integer value which indicates the size of the chunk.
-1 if there are error in parameters.
-2 if buffer size is not enough.
--*/
{
UINT uiOffset = 0;
UINT uiSubOffset = 0;
UINT uiNextOffset = 0;
UINT uiChunkCount = 0;
INT iChunkLen = 0;
if (lpBuffer == NULL || fpRngMKF == NULL || uiBufferSize == 0)
{
return -1;
}
//
// Get the total number of chunks.
//
uiChunkCount = PAL_MKFGetChunkCount(fpRngMKF);
if (uiRngNum >= uiChunkCount)
{
return -1;
}
//
// Get the offset of the chunk.
//
_fseek(fpRngMKF, 4 * uiRngNum, SEEK_SET);
_fread(&uiOffset, sizeof(UINT), 1, fpRngMKF);
_fread(&uiNextOffset, sizeof(UINT), 1, fpRngMKF);
uiOffset = SWAP32(uiOffset);
uiNextOffset = SWAP32(uiNextOffset);
//
// Get the length of the chunk.
//
iChunkLen = uiNextOffset - uiOffset;
if (iChunkLen != 0)
{
_fseek(fpRngMKF, uiOffset, SEEK_SET);
}
else
{
return -1;
}
//
// Get the number of sub chunks.
//
_fread(&uiChunkCount, sizeof(UINT), 1, fpRngMKF);
uiChunkCount = (SWAP32(uiChunkCount) - 4) / 4;
if (uiFrameNum >= uiChunkCount)
{
return -1;
}
//
// Get the offset of the sub chunk.
//
_fseek(fpRngMKF, uiOffset + 4 * uiFrameNum, SEEK_SET);
_fread(&uiSubOffset, sizeof(UINT), 1, fpRngMKF);
_fread(&uiNextOffset, sizeof(UINT), 1, fpRngMKF);
uiSubOffset = SWAP32(uiSubOffset);
uiNextOffset = SWAP32(uiNextOffset);
//
// Get the length of the sub chunk.
//
iChunkLen = uiNextOffset - uiSubOffset;
if ((UINT)iChunkLen > uiBufferSize)
{
return -2;
}
if (iChunkLen != 0)
{
_fseek(fpRngMKF, uiOffset + uiSubOffset, SEEK_SET);
_fread(lpBuffer, iChunkLen, 1, fpRngMKF);
}
else
{
return -1;
}
return iChunkLen;
}