/*
* Read the PACK directory into memory. The optional offset to the
* start of the PACK file is given in "offset". The number of files in
* the directory is returned in *dirsize_r.
*/
PACKDirPtr ReadPACKDirectory(FILE *packfile, UInt32 offset, UInt16 *dirsize_r)
{
PACKDirPtr dir;
UInt32 pos, size;
UInt16 max, i;
*dirsize_r = 0;
if (packfile == NULL)
return NULL;
if ((fseek(packfile, offset, SEEK_SET) < 0)
|| (ReadMagic(packfile) != FTYPE_PACK)
|| (ReadInt32(packfile, &pos) == FALSE)
|| (ReadInt32(packfile, &size) == FALSE)
|| (size == 0L)
|| (size / sizeof(struct PACKDirectory) > 65535L)
|| (fseek(packfile, offset + pos, SEEK_SET) < 0))
return NULL;
dir = (PACKDirPtr)__qmalloc(size);
max = (UInt16)(size / sizeof(struct PACKDirectory));
for (i = 0; i < max; i++)
{
if (ReadBytes(packfile, &dir[i], sizeof(struct PACKDirectory)) == FALSE)
{
free(dir);
return NULL;
}
ConvertFilePath(dir[i].name);
dir[i].offset = SwapInt32(dir[i].offset);
dir[i].size = SwapInt32(dir[i].size);
}
*dirsize_r = max;
return dir;
}
FILE *OpenFileReadMagic(const char *filename, int *ftype_r)
{
FILE *f;
*ftype_r = FTYPE_ERROR;
if ((f = fopen(filename, "rb")) == NULL)
return NULL;
*ftype_r = ReadMagic(f);
if (*ftype_r == FTYPE_ERROR)
{
fclose(f);
return NULL;
}
return f;
}
LzopStreamReader::LzopStreamReader(const void* base, size_t length)
{
header_t header; // LZOP header information
if(!base) throw Exception(E_POINTER);
if(length == 0) throw Exception(E_INVALIDARG);
intptr_t baseptr = intptr_t(base);
// Verify the magic number and read the LZOP header information
baseptr = ReadMagic(baseptr, &length);
baseptr = ReadHeader(baseptr, &length, &header);
// Initialize the decompression block member variables
m_block = m_blockcurrent = NULL;
m_blocklen = 0;
m_blockremain = 0;
// Initialize the LZO input stream member variables
m_lzopos = baseptr;
m_lzoremain = length;
m_lzoflags = header.flags;
}
