/*****************************************************************************
* UnZipBuffer
*
* It should be noted that there is a limit of 5MB total size for any ROM
******************************************************************************/
int UnZipBuffer (unsigned char *outbuffer, u64 discoffset, char *filename)
{
PKZIPHEADER pkzip;
int zipoffset = 0;
int zipchunk = 0;
char out[ZIPCHUNK];
z_stream zs;
int res;
int bufferoffset = 0;
int have = 0;
char readbuffer[2048];
char msg[128];
FILE *fatfile = NULL;
/*** FAT file support ***/
if (filename)
{
fatfile = fopen(filename, "rb");
if (fatfile == NULL) return 0;
}
/*** Read Zip Header ***/
if (fatfile)
{
fseek(fatfile, 0, SEEK_SET);
fread(readbuffer, FATCHUNK, 1, fatfile);
}
else
{
dvd_read (&readbuffer, DVDCHUNK, discoffset);
}
/*** Copy PKZip header to local, used as info ***/
memcpy (&pkzip, &readbuffer, sizeof (PKZIPHEADER));
sprintf (msg, "Unzipping %d bytes ...", FLIP32 (pkzip.uncompressedSize));
GUI_MsgBoxOpen("Information",msg,1);
/*** Prepare the zip stream ***/
memset (&zs, 0, sizeof (z_stream));
zs.zalloc = Z_NULL;
zs.zfree = Z_NULL;
zs.opaque = Z_NULL;
zs.avail_in = 0;
zs.next_in = Z_NULL;
res = inflateInit2 (&zs, -MAX_WBITS);
if (res != Z_OK)
{
GUI_WaitPrompt("Error","Unable to unzip file !");
return 0;
}
/*** Set ZipChunk for first pass ***/
zipoffset = (sizeof (PKZIPHEADER) + FLIP16 (pkzip.filenameLength) + FLIP16 (pkzip.extraDataLength));
zipchunk = ZIPCHUNK - zipoffset;
/*** Now do it! ***/
do
{
zs.avail_in = zipchunk;
zs.next_in = (Bytef *) & readbuffer[zipoffset];
/*** Now inflate until input buffer is exhausted ***/
do
{
zs.avail_out = ZIPCHUNK;
zs.next_out = (Bytef *) & out;
res = inflate (&zs, Z_NO_FLUSH);
if (res == Z_MEM_ERROR)
{
inflateEnd (&zs);
GUI_WaitPrompt("Error","Unable to unzip file !");
return 0;
}
have = ZIPCHUNK - zs.avail_out;
if (have)
{
/*** Copy to normal block buffer ***/
memcpy (&outbuffer[bufferoffset], &out, have);
bufferoffset += have;
}
}
while (zs.avail_out == 0);
/*** Readup the next 2k block ***/
zipoffset = 0;
zipchunk = ZIPCHUNK;
if (fatfile)
{
fread(readbuffer, FATCHUNK, 1, fatfile);
}
else
{
discoffset += DVDCHUNK;
dvd_read (&readbuffer, DVDCHUNK, discoffset);
}
}
while (res != Z_STREAM_END);
inflateEnd (&zs);
/* close file */
if (fatfile) fclose(fatfile);
if (res == Z_STREAM_END)
{
if (FLIP32 (pkzip.uncompressedSize) == (u32) bufferoffset) return bufferoffset;
else return FLIP32 (pkzip.uncompressedSize);
}
return 0;
}
int load_archive(char *filename, unsigned char *buffer, int maxsize, char *extension)
{
int size = 0;
char in[CHUNKSIZE];
char msg[64];
char type[16];
/* Open file */
FILE *fd = fopen(filename, "rb");
/* Autodetect needed System ROM files */
if (filename == CD_BIOS_US)
{
sprintf(type,"CD BIOS (USA)");
}
else if (filename == CD_BIOS_EU)
{
sprintf(type,"CD BIOS (PAL)");
}
else if (filename == CD_BIOS_JP)
{
sprintf(type,"CD BIOS (JAP)");
}
else if (filename == AR_ROM)
{
sprintf(type,"Action Replay");
}
else if (filename == GG_ROM)
{
sprintf(type,"Game Genie");
}
else if (filename == SK_ROM)
{
sprintf(type,"S&K (2MB ROM)");
}
else if (filename == SK_UPMEM)
{
sprintf(type,"S2&K (256K ROM)");
}
else if ((filename == MS_BIOS_US) || (filename == MS_BIOS_EU) || (filename == MS_BIOS_JP) || (filename == GG_BIOS) || (filename == MD_BIOS))
{
/* Mega Drive / Genesis, Master System & Game Gear BIOS are optional so we disable error messages */
SILENT = 1;
}
else
{
sprintf(type,"file");
}
if (!fd)
{
sprintf(msg,"Unable to open %s", type);
GUI_WaitPrompt("Error", msg);
SILENT = 0;
return 0;
}
/* Read first chunk */
fread(in, CHUNKSIZE, 1, fd);
/* Detect Zip file */
if (memcmp(in, "PK", 2) == 0)
{
/* Inflate buffer */
char out[CHUNKSIZE];
/* PKZip header pointer */
PKZIPHEADER *pkzip = (PKZIPHEADER *) in;
/* Retrieve uncompressed ROM size */
size = FLIP32(pkzip->uncompressedSize);
/* Check ROM size */
if (size > MAXROMSIZE)
{
fclose(fd);
GUI_WaitPrompt("Error","File is too large");
SILENT = 0;
return 0;
}
else if (size > maxsize)
{
size = maxsize;
}
sprintf (msg, "Unzipping %d bytes ...", size);
GUI_MsgBoxUpdate("Information",msg);
/* Initialize zip stream */
z_stream zs;
memset (&zs, 0, sizeof (z_stream));
zs.zalloc = Z_NULL;
zs.zfree = Z_NULL;
zs.opaque = Z_NULL;
zs.avail_in = 0;
zs.next_in = Z_NULL;
int res = inflateInit2(&zs, -MAX_WBITS);
if (res != Z_OK)
{
fclose(fd);
sprintf(msg,"Unable to unzip %s", type);
GUI_WaitPrompt("Error",msg);
SILENT = 0;
return 0;
}
/* Compressed filename offset */
int offset = sizeof (PKZIPHEADER) + FLIP16(pkzip->filenameLength);
if (extension)
{
memcpy(extension, &in[offset - 3], 3);
extension[3] = 0;
}
/* Initial Zip buffer offset */
offset += FLIP16(pkzip->extraDataLength);
zs.next_in = (Bytef *)&in[offset];
/* Initial Zip remaining chunk size */
zs.avail_in = CHUNKSIZE - offset;
/* Initialize output size */
size = 0;
/* Start unzipping file */
do
{
/* Inflate data until output buffer is empty */
do
{
zs.avail_out = CHUNKSIZE;
zs.next_out = (Bytef *) out;
res = inflate(&zs, Z_NO_FLUSH);
if (res == Z_MEM_ERROR)
{
inflateEnd(&zs);
fclose(fd);
sprintf(msg,"Unable to unzip %s", type);
GUI_WaitPrompt("Error",msg);
SILENT = 0;
return 0;
}
offset = CHUNKSIZE - zs.avail_out;
if ((size + offset) > maxsize)
{
offset = maxsize - size;
}
if (offset)
{
memcpy(buffer, out, offset);
buffer += offset;
size += offset;
}
}
while ((zs.avail_out == 0) && (size < maxsize));
/* Read next chunk of zipped data */
fread(in, CHUNKSIZE, 1, fd);
zs.next_in = (Bytef *)&in[0];
zs.avail_in = CHUNKSIZE;
}
while ((res != Z_STREAM_END) && (size < maxsize));
inflateEnd (&zs);
}
else
{
/* Get file size */
fseek(fd, 0, SEEK_END);
size = ftell(fd);
fseek(fd, 0, SEEK_SET);
/* Check ROM size */
if (size > MAXROMSIZE)
{
fclose(fd);
GUI_WaitPrompt("Error","File is too large");
SILENT = 0;
return 0;
}
else if (size > maxsize)
{
size = maxsize;
}
sprintf((char *)msg,"Loading %d bytes ...", size);
GUI_MsgBoxUpdate("Information", (char *)msg);
/* filename extension */
if (extension)
{
memcpy(extension, &filename[strlen(filename) - 3], 3);
extension[3] = 0;
}
/* Read into buffer */
int left = size;
while (left > CHUNKSIZE)
{
fread(buffer, CHUNKSIZE, 1, fd);
buffer += CHUNKSIZE;
left -= CHUNKSIZE;
}
/* Read remaining bytes */
fread(buffer, left, 1, fd);
}
/* Close file */
fclose(fd);
/* Return loaded ROM size */
SILENT = 0;
return size;
}
size_t
UnZipBuffer (unsigned char *outbuffer)
{
PKZIPHEADER pkzip;
size_t zipoffset = 0;
size_t zipchunk = 0;
char out[ZIPCHUNK];
z_stream zs;
int res;
size_t bufferoffset = 0;
size_t have = 0;
char readbuffer[ZIPCHUNK];
size_t sizeread = 0;
// Read Zip Header
fseek(file, 0, SEEK_SET);
sizeread = fread (readbuffer, 1, ZIPCHUNK, file);
if(sizeread <= 0)
return 0;
/*** Copy PKZip header to local, used as info ***/
memcpy (&pkzip, readbuffer, sizeof (PKZIPHEADER));
pkzip.uncompressedSize = FLIP32 (pkzip.uncompressedSize);
ShowProgress ("Loading...", 0, pkzip.uncompressedSize);
/*** Prepare the zip stream ***/
memset (&zs, 0, sizeof (z_stream));
zs.zalloc = Z_NULL;
zs.zfree = Z_NULL;
zs.opaque = Z_NULL;
zs.avail_in = 0;
zs.next_in = Z_NULL;
res = inflateInit2 (&zs, -MAX_WBITS);
if (res != Z_OK)
goto done;
/*** Set ZipChunk for first pass ***/
zipoffset =
(sizeof (PKZIPHEADER) + FLIP16 (pkzip.filenameLength) +
FLIP16 (pkzip.extraDataLength));
zipchunk = ZIPCHUNK - zipoffset;
/*** Now do it! ***/
do
{
zs.avail_in = zipchunk;
zs.next_in = (Bytef *) & readbuffer[zipoffset];
/*** Now inflate until input buffer is exhausted ***/
do
{
zs.avail_out = ZIPCHUNK;
zs.next_out = (Bytef *) & out;
res = inflate (&zs, Z_NO_FLUSH);
if (res == Z_MEM_ERROR)
{
goto done;
}
have = ZIPCHUNK - zs.avail_out;
if (have)
{
/*** Copy to normal block buffer ***/
memcpy (&outbuffer[bufferoffset], &out, have);
bufferoffset += have;
}
}
while (zs.avail_out == 0);
// Readup the next 2k block
zipoffset = 0;
zipchunk = ZIPCHUNK;
sizeread = fread (readbuffer, 1, ZIPCHUNK, file);
if(sizeread <= 0)
goto done; // read failure
ShowProgress ("Loading...", bufferoffset, pkzip.uncompressedSize);
}
while (res != Z_STREAM_END);
done:
inflateEnd (&zs);
CancelAction();
if (res == Z_STREAM_END)
return pkzip.uncompressedSize;
else
return 0;
}
int
LoadSDFile (char *filename, int length)
{
char zipbuffer[2048];
char filepath[MAXPATHLEN];
FILE *handle;
char *rbuffer;
PKZIPHEADER pkzip;
z_stream zs;
int res, outbytes = 0;
int size;
int have;
rbuffer = (char *) Memory.ROM;
/* Check filename length */
if ((strlen(currSDdir)+1+strlen(filelist[selection].filename)) < MAXPATHLEN)
sprintf(filepath, "%s/%s",currSDdir,filelist[selection].filename);
else
{
WaitPrompt((char*) "Maximum Filename Length reached !");
haveSDdir = 0; // reset everything before next access
return -1;
}
handle = fopen (filepath, "rb");
if (handle > 0)
{
fread (zipbuffer, 1, 2048, handle);
if (IsZipFile (zipbuffer))
{
/*** Unzip the ROM ***/
memcpy (&pkzip, zipbuffer, sizeof (PKZIPHEADER));
pkzip.uncompressedSize = FLIP32 (pkzip.uncompressedSize);
memset (&zs, 0, sizeof (zs));
zs.zalloc = Z_NULL;
zs.zfree = Z_NULL;
zs.opaque = Z_NULL;
zs.avail_in = 0;
zs.next_in = Z_NULL;
res = inflateInit2 (&zs, -MAX_WBITS);
if (res != Z_OK)
{
fclose (handle);
return 0;
}
size = (sizeof (PKZIPHEADER) +
FLIP16 (pkzip.filenameLength) +
FLIP16 (pkzip.extraDataLength));
do
{
zs.avail_in = 2048 - size;
zs.next_in = (Bytef *) zipbuffer + size;
do
{
zs.avail_out = 16384;
zs.next_out = (Bytef *) output;
res = inflate (&zs, Z_NO_FLUSH);
have = 16384 - zs.avail_out;
if (have)
{
memcpy (rbuffer + outbytes, output, have);
outbytes += have;
}
}
while (zs.avail_out == 0);
sprintf (filepath, "Read %d bytes of %d", outbytes,
pkzip.uncompressedSize);
//ShowAction (filepath);
ShowProgress (filepath, outbytes, pkzip.uncompressedSize);
size = 0;
fread (zipbuffer, 1, 2048, handle);
}
while (res != Z_STREAM_END
&& (u32) outbytes < pkzip.uncompressedSize);
inflateEnd (&zs);
fclose (handle);
return pkzip.uncompressedSize;
}
else
{
/*** Just load the file up ***/
fseek(handle, 0, SEEK_END);
length = ftell(handle); // get filesize
fseek(handle, 2048, SEEK_SET); // seek back to point where we left off
sprintf (filepath, "Loading %d bytes", length);
ShowAction (filepath);
memcpy (rbuffer, zipbuffer, 2048); // copy what we already read
fread (rbuffer + 2048, 1, length - 2048, handle);
fclose (handle);
return length;
}
}
else
{
WaitPrompt((char*) "Error opening file");
return 0;
}
return 0;
}
int
UnZipBuffer (unsigned char *outbuffer, int method)
{
PKZIPHEADER pkzip;
int zipoffset = 0;
int zipchunk = 0;
char out[ZIPCHUNK];
z_stream zs;
int res;
int bufferoffset = 0;
int readoffset = 0;
int have = 0;
char readbuffer[ZIPCHUNK];
u64 discoffset = 0;
// Read Zip Header
switch (method)
{
case METHOD_SD:
case METHOD_USB:
fseek(fatfile, 0, SEEK_SET);
fread (readbuffer, 1, ZIPCHUNK, fatfile);
break;
case METHOD_DVD:
discoffset = dvddir;
dvd_read (readbuffer, ZIPCHUNK, discoffset);
break;
case METHOD_SMB:
SMB_ReadFile(readbuffer, ZIPCHUNK, 0, smbfile);
break;
}
/*** Copy PKZip header to local, used as info ***/
memcpy (&pkzip, readbuffer, sizeof (PKZIPHEADER));
pkzip.uncompressedSize = FLIP32 (pkzip.uncompressedSize);
ShowProgress ((char *)"Loading...", 0, pkzip.uncompressedSize);
/*** Prepare the zip stream ***/
memset (&zs, 0, sizeof (z_stream));
zs.zalloc = Z_NULL;
zs.zfree = Z_NULL;
zs.opaque = Z_NULL;
zs.avail_in = 0;
zs.next_in = Z_NULL;
res = inflateInit2 (&zs, -MAX_WBITS);
if (res != Z_OK)
return 0;
/*** Set ZipChunk for first pass ***/
zipoffset =
(sizeof (PKZIPHEADER) + FLIP16 (pkzip.filenameLength) +
FLIP16 (pkzip.extraDataLength));
zipchunk = ZIPCHUNK - zipoffset;
/*** Now do it! ***/
do
{
zs.avail_in = zipchunk;
zs.next_in = (Bytef *) & readbuffer[zipoffset];
/*** Now inflate until input buffer is exhausted ***/
do
{
zs.avail_out = ZIPCHUNK;
zs.next_out = (Bytef *) & out;
res = inflate (&zs, Z_NO_FLUSH);
if (res == Z_MEM_ERROR)
{
inflateEnd (&zs);
return 0;
}
have = ZIPCHUNK - zs.avail_out;
if (have)
{
/*** Copy to normal block buffer ***/
memcpy (&outbuffer[bufferoffset], &out, have);
bufferoffset += have;
}
}
while (zs.avail_out == 0);
// Readup the next 2k block
zipoffset = 0;
zipchunk = ZIPCHUNK;
switch (method)
{
case METHOD_SD:
case METHOD_USB:
fread (readbuffer, 1, ZIPCHUNK, fatfile);
break;
case METHOD_DVD:
readoffset += ZIPCHUNK;
dvd_read (readbuffer, ZIPCHUNK, discoffset+readoffset);
break;
case METHOD_SMB:
readoffset += ZIPCHUNK;
SMB_ReadFile(readbuffer, ZIPCHUNK, readoffset, smbfile);
break;
}
ShowProgress ((char *)"Loading...", bufferoffset, pkzip.uncompressedSize);
}
while (res != Z_STREAM_END);
inflateEnd (&zs);
if (res == Z_STREAM_END)
{
if (pkzip.uncompressedSize == (u32) bufferoffset)
return bufferoffset;
else
return pkzip.uncompressedSize;
}
return 0;
}
/*****************************************************************************
* unzip
*
* It should be noted that there is a limit of 5MB total size for any ROM
******************************************************************************/
int
UnZipBuffer (unsigned char *outbuffer, u64 discoffset, short where, FILE* filehandle)
{
PKZIPHEADER pkzip;
int zipoffset = 0;
int zipchunk = 0;
char out[ZIPCHUNK];
z_stream zs;
int res;
int bufferoffset = 0;
int have = 0;
char readbuffer[2048];
char msg[128];
/*** Read Zip Header ***/
switch (where) {
case 0: // SD Card
fseek(filehandle, 0, SEEK_SET);
fread (readbuffer, 1, 2048, filehandle); break;
case 1: // DVD
dvd_read (readbuffer, 2048, discoffset); break;
}
/*** Copy PKZip header to local, used as info ***/
memcpy (&pkzip, readbuffer, sizeof (PKZIPHEADER));
pkzip.uncompressedSize = FLIP32 (pkzip.uncompressedSize);
sprintf (msg, "Unzipping %d bytes ... Wait",
pkzip.uncompressedSize);
ShowAction (msg);
/*** Prepare the zip stream ***/
memset (&zs, 0, sizeof (z_stream));
zs.zalloc = Z_NULL;
zs.zfree = Z_NULL;
zs.opaque = Z_NULL;
zs.avail_in = 0;
zs.next_in = Z_NULL;
res = inflateInit2 (&zs, -MAX_WBITS);
if (res != Z_OK)
return 0;
/*** Set ZipChunk for first pass ***/
zipoffset =
(sizeof (PKZIPHEADER) + FLIP16 (pkzip.filenameLength) +
FLIP16 (pkzip.extraDataLength));
zipchunk = ZIPCHUNK - zipoffset;
/*** Now do it! ***/
do
{
zs.avail_in = zipchunk;
zs.next_in = (Bytef *) & readbuffer[zipoffset];
/*** Now inflate until input buffer is exhausted ***/
do
{
zs.avail_out = ZIPCHUNK;
zs.next_out = (Bytef *) & out;
res = inflate (&zs, Z_NO_FLUSH);
if (res == Z_MEM_ERROR)
{
inflateEnd (&zs);
return 0;
}
have = ZIPCHUNK - zs.avail_out;
if (have)
{
/*** Copy to normal block buffer ***/
memcpy (&outbuffer[bufferoffset], &out, have);
bufferoffset += have;
}
}
while (zs.avail_out == 0);
/*** Readup the next 2k block ***/
zipoffset = 0;
zipchunk = ZIPCHUNK;
switch (where) {
case 0: // SD Card
fread (readbuffer, 1, 2048, filehandle); break;
case 1: // DVD
discoffset += 2048;
dvd_read (readbuffer, 2048, discoffset); break;
}
}
while (res != Z_STREAM_END);
inflateEnd (&zs);
if (res == Z_STREAM_END)
{
if (pkzip.uncompressedSize == (u32) bufferoffset)
return bufferoffset;
else
return pkzip.uncompressedSize;
}
return 0;
}
int UnZipBuffer (unsigned char *outbuffer, long discoffset, char *filename)
{
PKZIPHEADER pkzip;
int zipoffset = 0;
int zipchunk = 0;
char out[ZIPCHUNK];
z_stream zs;
int res;
int bufferoffset = 0;
int have = 0;
char readbuffer[2048];
char msg[128];
FILE *fatfile = NULL;
int size=0;
/*** FAT file support ***/
if (filename)
{
fatfile = fopen(filename, "rb");
if (fatfile == NULL) return 0;
}
/*** Read Zip Header ***/
if (fatfile)
{
fseek(fatfile, 0, SEEK_SET);
fread(readbuffer, 1, 2048, fatfile);
}
else
{
printf("\t\t\tUnable to unzip file nt found\n");
return 0;
}
/*** Copy PKZip header to local, used as info ***/
memcpy (&pkzip, &readbuffer, sizeof (PKZIPHEADER));
sprintf (msg, "\t\t\t\tUnzipping %d bytes ...\n", FLIP32 (pkzip.uncompressedSize));
printf(msg);
/*** Prepare the zip stream ***/
memset (&zs, 0, sizeof (z_stream));
zs.zalloc = Z_NULL;
zs.zfree = Z_NULL;
zs.opaque = Z_NULL;
zs.avail_in = 0;
zs.next_in = Z_NULL;
res = inflateInit2 (&zs, -MAX_WBITS);
if (res != Z_OK)
{
printf("\t\t\tUnable to unzip file\n");
return 0;
}
/*** Set ZipChunk for first pass ***/
zipoffset = (sizeof (PKZIPHEADER) + FLIP16 (pkzip.filenameLength) + FLIP16 (pkzip.extraDataLength));
zipchunk = ZIPCHUNK - zipoffset;
/*** Now do it! ***/
do
{
zs.avail_in = zipchunk;
zs.next_in = (Bytef *) & readbuffer[zipoffset];
/*** Now inflate until input buffer is exhausted ***/
do
{
zs.avail_out = ZIPCHUNK;
zs.next_out = (Bytef *) & out;
res = inflate (&zs, Z_NO_FLUSH);
if (res == Z_MEM_ERROR)
{
inflateEnd (&zs);
printf("\t\t\tUnable to unzip file\n");
return 0;
}
have = ZIPCHUNK - zs.avail_out;
if (have)
{
/*** Copy to normal block buffer ***/
memcpy (&outbuffer[bufferoffset], &out, have);
bufferoffset += have;
}
}
while (zs.avail_out == 0);
/*** Readup the next 2k block ***/
zipoffset = 0;
zipchunk = ZIPCHUNK;
if (fatfile)
{
fread(readbuffer, 1, 2048, fatfile);
}
//avance le chargement ...
char loadingTxt[256];
//sprintf(loadingTxt,"Loading %s (%d%%)\n", filename, (pkzip.uncompressedSize - size) * 100 /pkzip.uncompressedSize);
sprintf(loadingTxt,"Loading %s (%d%%)\n",filename,(pkzip.compressedSize - size) * 100 /pkzip.compressedSize);
fastPrintf(200,240,0x00000000,loadingTxt);
size+=2048;
}
while (res != Z_STREAM_END);
inflateEnd (&zs);
/* close file */
if (fatfile) fclose(fatfile);
if (res == Z_STREAM_END)
{
if (FLIP32 (pkzip.uncompressedSize) == (int) bufferoffset) return bufferoffset;
else return FLIP32 (pkzip.uncompressedSize);
}
return 0;
}
/*****************************************************************************
* UnZipBuffer
*
* It should be noted that there is a limit of 5MB total size for any ROM
******************************************************************************/
int UnZipBuffer (unsigned char *outbuffer, FILE *fd)
{
PKZIPHEADER pkzip;
int zipoffset = 0;
int zipchunk = 0;
char out[ZIPCHUNK];
z_stream zs;
int res;
int bufferoffset = 0;
int have = 0;
char readbuffer[ZIPCHUNK];
char msg[64];
/*** Read Zip Header ***/
fread(readbuffer, ZIPCHUNK, 1, fd);
/*** Copy PKZip header to local, used as info ***/
memcpy (&pkzip, &readbuffer, sizeof (PKZIPHEADER));
if (FLIP32 (pkzip.uncompressedSize) > MAXROMSIZE)
{
printf("Error","File is too large !");
return 0;
}
sprintf (msg, "Unzipping %d bytes ...", FLIP32 (pkzip.uncompressedSize));
printf("Information",msg,1);
/*** Prepare the zip stream ***/
memset (&zs, 0, sizeof (z_stream));
zs.zalloc = Z_NULL;
zs.zfree = Z_NULL;
zs.opaque = Z_NULL;
zs.avail_in = 0;
zs.next_in = Z_NULL;
res = inflateInit2 (&zs, -MAX_WBITS);
if (res != Z_OK)
{
printf("Error","Unable to unzip file !");
return 0;
}
/*** Set ZipChunk for first pass ***/
zipoffset = (sizeof (PKZIPHEADER) + FLIP16 (pkzip.filenameLength) + FLIP16 (pkzip.extraDataLength));
zipchunk = ZIPCHUNK - zipoffset;
/*** Now do it! ***/
do
{
zs.avail_in = zipchunk;
zs.next_in = (Bytef *) & readbuffer[zipoffset];
/*** Now inflate until input buffer is exhausted ***/
do
{
zs.avail_out = ZIPCHUNK;
zs.next_out = (Bytef *) & out;
res = inflate (&zs, Z_NO_FLUSH);
if (res == Z_MEM_ERROR)
{
inflateEnd (&zs);
printf("Error","Unable to unzip file !");
return 0;
}
have = ZIPCHUNK - zs.avail_out;
if (have)
{
/*** Copy to normal block buffer ***/
memcpy (&outbuffer[bufferoffset], &out, have);
bufferoffset += have;
}
}
while (zs.avail_out == 0);
/*** Readup the next 2k block ***/
zipoffset = 0;
zipchunk = ZIPCHUNK;
fread(readbuffer, ZIPCHUNK, 1, fd);
}
while (res != Z_STREAM_END);
inflateEnd (&zs);
if (res == Z_STREAM_END)
{
if (FLIP32 (pkzip.uncompressedSize) == (unsigned int) bufferoffset)
return bufferoffset;
else
return FLIP32 (pkzip.uncompressedSize);
}
return 0;
}
