aboutsummaryrefslogtreecommitdiff
path: root/fastjar/compress.c
diff options
context:
space:
mode:
Diffstat (limited to 'fastjar/compress.c')
-rw-r--r--fastjar/compress.c562
1 files changed, 0 insertions, 562 deletions
diff --git a/fastjar/compress.c b/fastjar/compress.c
deleted file mode 100644
index 84b3dad..0000000
--- a/fastjar/compress.c
+++ /dev/null
@@ -1,562 +0,0 @@
-/* $Id: compress.c,v 1.2 2000/12/14 18:45:35 ghazi Exp $
-
- $Log: compress.c,v $
- Revision 1.2 2000/12/14 18:45:35 ghazi
- Warning fixes:
-
- * compress.c: Include stdlib.h and compress.h.
- (rcsid): Delete.
- (report_str_error): Make static.
- (ez_inflate_str): Delete unused variable. Add parens in if-stmt.
- (hrd_inflate_str): Likewise.
-
- * compress.h (init_compression, end_compression, init_inflation,
- end_inflation): Prototype void arguments.
-
- * dostime.c (rcsid): Delete.
-
- * jargrep.c: Include ctype.h, stdlib.h, zlib.h and compress.h.
- Make functions static. Cast ctype function argument to `unsigned
- char'. Add parens in if-stmts. Constify.
- (Usage): Change into a macro.
- (jargrep): Remove unused parameter.
-
- * jartool.c: Constify. Add parens in if-stmts. Align
- signed/unsigned char pointers in functions calls using casts.
- (rcsid): Delete.
- (list_jar): Fix printf format specifier.
- (usage): Chop long string into bits. Reformat.
-
- * pushback.c (rcsid): Delete.
-
- Revision 1.1 2000/12/09 03:08:23 apbianco
- 2000-12-08 Alexandre Petit-Bianco <apbianco@cygnus.com>
-
- * fastjar: Imported.
-
- Revision 1.7 2000/09/13 14:02:02 cory
- Reformatted some of the code to more closly match the layout of the orriginal
- fastjar utility.
-
- Revision 1.6 2000/09/12 22:29:36 cory
- Jargrep now seems to do what I want it to do. Performs properly on Linux x86,
- will test some other platforms later.
-
- Revision 1.1.1.1 1999/12/06 03:09:16 toast
- initial checkin..
-
-
-
- Revision 1.7 1999/05/10 08:50:05 burnsbr
- *** empty log message ***
-
- Revision 1.6 1999/05/10 08:38:44 burnsbr
- *** empty log message ***
-
- Revision 1.5 1999/05/10 08:30:29 burnsbr
- added inflation code
-
- Revision 1.4 1999/04/27 10:03:33 burnsbr
- added configure support
-
- Revision 1.3 1999/04/26 02:35:32 burnsbr
- compression now works.. yahoo
-
- Revision 1.2 1999/04/23 12:01:59 burnsbr
- added licence stuff.
-
- Revision 1.1 1999/04/23 11:58:25 burnsbr
- Initial revision
-
-
-*/
-
-/*
- compress.c - code for handling deflation
- Copyright (C) 1999 Bryan Burns
- Copyright (C) 2004 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License
- as published by the Free Software Foundation; either version 2
- of the License, or (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#include "config.h"
-
-#include <zlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <errno.h>
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#ifdef STDC_HEADERS
-#include <stdlib.h>
-#endif
-
-#include <sys/types.h>
-
-#include "jartool.h"
-#include "pushback.h"
-#include "compress.h"
-#include "shift.h"
-
-int write_data (int, void *, size_t, struct zipentry *);
-
-extern int seekable;
-extern off_t end_of_entries;
-
-static z_stream zs;
-
-void init_compression(){
-
- memset(&zs, 0, sizeof(z_stream));
-
- zs.zalloc = Z_NULL;
- zs.zfree = Z_NULL;
- zs.opaque = Z_NULL;
-
- /* Why -MAX_WBITS? zlib has an undocumented feature, where if the windowbits
- parameter is negative, it omits the zlib header, which seems to kill
- any other zip/unzip program. This caused me SO much pain.. */
- if(deflateInit2(&zs, Z_DEFAULT_COMPRESSION, Z_DEFLATED, -MAX_WBITS,
- 9, Z_DEFAULT_STRATEGY) != Z_OK){
-
- fprintf(stderr, "Error initializing deflation!\n");
- exit(1);
- }
-}
-
-int
-write_data (int fd, void *buf, size_t len,
- struct zipentry *ze __attribute__((unused)))
-{
-#ifdef WITH_SHIFT_DOWN
- struct zipentry *next = NULL;
- off_t here = lseek (fd, 0, SEEK_CUR);
- /*
- * If we are updating and there is not enough space before the next
- * entry, expand the file.
- */
- if (ze)
- {
- next = ze->next_entry;
- if (next && here + len >= next->offset)
- {
- if (shift_down (fd, next->offset, (here + len) - next->offset, next))
- {
- perror ("can't expand file");
- exit (1);
- }
- }
- }
-#endif /* WITH_SHIFT_DOWN */
-
- return write (fd, buf, len);
-}
-
-int compress_file(int in_fd, int out_fd, struct zipentry *ze,
- struct zipentry *existing)
-{
- Bytef in_buff[RDSZ];
- Bytef out_buff[RDSZ];
- unsigned int rdamt, wramt;
- unsigned long tr = 0;
- int rtval;
-
- rdamt = 0;
-
- zs.avail_in = 0;
- zs.next_in = in_buff;
-
- zs.next_out = out_buff;
- zs.avail_out = (uInt)RDSZ;
-
- ze->crc = crc32(0L, Z_NULL, 0);
-
- for(; ;){
-
- /* If deflate is out of input, fill the input buffer for it */
- if(zs.avail_in == 0 && zs.avail_out > 0){
- if((rtval = read(in_fd, in_buff, RDSZ)) == 0)
- break;
-
- if(rtval == -1){
- perror("read");
- exit(1);
- }
-
- rdamt = rtval;
-
- /* compute the CRC while we're at it */
- ze->crc = crc32(ze->crc, in_buff, rdamt);
-
- /* update the total amount read sofar */
- tr += rdamt;
-
- zs.next_in = in_buff;
- zs.avail_in = rdamt;
- }
-
- /* deflate the data */
- if(deflate(&zs, 0) != Z_OK){
- fprintf(stderr, "Error deflating! %s:%d\n", __FILE__, __LINE__);
- exit(1);
- }
-
- /* If the output buffer is full, dump it to disk */
- if(zs.avail_out == 0){
-
- if (write_data (out_fd, out_buff, RDSZ, existing) != RDSZ)
- {
- perror("write");
- exit(1);
- }
-
- /* clear the output buffer */
- zs.next_out = out_buff;
- zs.avail_out = (uInt)RDSZ;
- }
-
- }
-
- /* If we have any data waiting in the buffer after we're done with the file
- we can flush it */
- if(zs.avail_out < RDSZ){
-
- wramt = RDSZ - zs.avail_out;
-
- if (write_data (out_fd, out_buff, wramt, existing) != (int)wramt)
- {
- perror("write");
- exit(1);
- }
- /* clear the output buffer */
- zs.next_out = out_buff;
- zs.avail_out = (uInt)RDSZ;
- }
-
-
- /* finish deflation. This purges zlib's internal data buffers */
- while(deflate(&zs, Z_FINISH) == Z_OK){
- wramt = RDSZ - zs.avail_out;
-
- if (write_data (out_fd, out_buff, wramt, existing) != (int)wramt)
- {
- perror("write");
- exit(1);
- }
-
- zs.next_out = out_buff;
- zs.avail_out = (uInt)RDSZ;
- }
-
- /* If there's any data left in the buffer, write it out */
- if(zs.avail_out != RDSZ){
- wramt = RDSZ - zs.avail_out;
-
- if (write_data (out_fd, out_buff, wramt, existing) != (int)wramt)
- {
- perror("write");
- exit(1);
- }
- }
-
- /* update fastjar's entry information */
- ze->usize = (ub4)zs.total_in;
- ze->csize = (ub4)zs.total_out;
-
- /* Reset the deflation for the next time around */
- if(deflateReset(&zs) != Z_OK){
- fprintf(stderr, "Error resetting deflation\n");
- exit(1);
- }
-
- return 0;
-}
-
-void end_compression(){
- int rtval;
-
- /* Oddly enough, zlib always returns Z_DATA_ERROR if you specify no
- zlib header. Go fig. */
- if((rtval = deflateEnd(&zs)) != Z_OK && rtval != Z_DATA_ERROR){
- fprintf(stderr, "Error calling deflateEnd\n");
- fprintf(stderr, "error: (%d) %s\n", rtval, zs.msg);
- exit(1);
- }
-}
-
-
-void init_inflation(){
-
- memset(&zs, 0, sizeof(z_stream));
-
- zs.zalloc = Z_NULL;
- zs.zfree = Z_NULL;
- zs.opaque = Z_NULL;
-
- if(inflateInit2(&zs, -15) != Z_OK){
- fprintf(stderr, "Error initializing deflation!\n");
- exit(1);
- }
-
-}
-
-int inflate_file(pb_file *pbf, int out_fd, struct zipentry *ze){
- Bytef in_buff[RDSZ];
- Bytef out_buff[RDSZ];
- unsigned int rdamt;
- int rtval;
- ub4 crc = 0;
-
- zs.avail_in = 0;
-
- crc = crc32(crc, NULL, 0); /* initialize crc */
-
- /* loop until we've consumed all the compressed data */
- for(;;){
-
- if(zs.avail_in == 0){
- if((rdamt = pb_read(pbf, in_buff, RDSZ)) == 0)
- break;
- else if((int)rdamt < 0){
- perror("read");
- exit(1);
- }
-
-#ifdef DEBUG
- printf("%d bytes read\n", rdamt);
-#endif
-
- zs.next_in = in_buff;
- zs.avail_in = rdamt;
- }
-
- zs.next_out = out_buff;
- zs.avail_out = RDSZ;
-
- if((rtval = inflate(&zs, 0)) != Z_OK){
- if(rtval == Z_STREAM_END){
-#ifdef DEBUG
- printf("end of stream\n");
-#endif
- if(zs.avail_out != RDSZ){
- crc = crc32(crc, out_buff, (RDSZ - zs.avail_out));
-
- if(out_fd >= 0)
- if(write(out_fd, out_buff, (RDSZ - zs.avail_out)) !=
- (int)(RDSZ - zs.avail_out)){
- perror("write");
- exit(1);
- }
- }
-
- break;
- } else {
- fprintf(stderr, "Error inflating file! (%d)\n", rtval);
- exit(1);
- }
- } else {
- if(zs.avail_out != RDSZ){
- crc = crc32(crc, out_buff, (RDSZ - zs.avail_out));
-
- if(out_fd >= 0)
- if(write(out_fd, out_buff, (RDSZ - zs.avail_out)) !=
- (int)(RDSZ - zs.avail_out)){
- perror("write");
- exit(1);
- }
- zs.next_out = out_buff;
- zs.avail_out = RDSZ;
- }
- }
- }
-#ifdef DEBUG
- printf("done inflating\n");
-#endif
-
-#ifdef DEBUG
- printf("%d bytes left over\n", zs.avail_in);
-#endif
-
-#ifdef DEBUG
- printf("CRC is %x\n", crc);
-#endif
-
- ze->crc = crc;
-
- pb_push(pbf, zs.next_in, zs.avail_in);
-
- ze->usize = zs.total_out;
-
- inflateReset(&zs);
- return 0;
-}
-
-/*
-Function name: report_str_error
-args: val Error code returned from zlib.
-purpose: Put out an error message corresponding to error code returned from zlib.
-Be suitably cryptic seeing I don't really know exactly what these errors mean.
-*/
-
-static void report_str_error(int val) {
- switch(val) {
- case Z_STREAM_END:
- break;
- case Z_NEED_DICT:
- fprintf(stderr, "Need a dictionary?\n");
- exit(1);
- case Z_DATA_ERROR:
- fprintf(stderr, "Z_DATA_ERROR\n");
- exit(1);
- case Z_STREAM_ERROR:
- fprintf(stderr, "Z_STREAM_ERROR\n");
- exit(1);
- case Z_MEM_ERROR:
- fprintf(stderr, "Z_MEM_ERROR\n");
- exit(1);
- case Z_BUF_ERROR:
- fprintf(stderr, "Z_BUF_ERROR\n");
- exit(1);
- case Z_OK:
- break;
- default:
- fprintf(stderr, "Unknown behavior from inflate\n");
- exit(1);
- }
-}
-
-/*
-Function name: ez_inflate_str
-args: pbf Pointer to pushback handle for file.
- csize Compressed size of embedded file.
- usize Uncompressed size of embedded file.
-purpose: Read in and decompress the contents of an embedded file and store it in a
-byte array.
-returns: Byte array of uncompressed embedded file.
-*/
-
-static Bytef *ez_inflate_str(pb_file *pbf, ub4 csize, ub4 usize) {
- Bytef *out_buff;
- Bytef *in_buff;
- unsigned int rdamt;
-
- if((zs.next_in = in_buff = (Bytef *) malloc(csize))) {
- if((zs.next_out = out_buff = (Bytef *) malloc(usize + 1))) {
- if((rdamt = pb_read(pbf, zs.next_in, csize)) == csize) {
- zs.avail_in = csize;
- zs.avail_out = usize;
- report_str_error(inflate(&zs, 0));
- free(in_buff);
- inflateReset(&zs);
- out_buff[usize] = '\0';
- }
- else {
- fprintf(stderr, "Read failed on input file.\n");
- fprintf(stderr, "Tried to read %u but read %u instead.\n", csize, rdamt);
- free(in_buff);
- free(out_buff);
- exit(1);
- }
- }
- else {
- fprintf(stderr, "Malloc of out_buff failed.\n");
- fprintf(stderr, "Error: %s\n", strerror(errno));
- free(in_buff);
- exit(1);
- }
- }
- else {
- fprintf(stderr, "Malloc of in_buff failed.\n");
- fprintf(stderr, "Error: %s\n", strerror(errno));
- exit(1);
- }
-
- return out_buff;
-}
-
-/*
-Function name: hrd_inflate_str
-args: pbf Pointer to pushback handle for file.
- csize Pointer to compressed size of embedded file.
- usize Pointer to uncompressed size of embedded file.
-purpose: Read and decompress an embedded file into a string. Set csize and usize
-accordingly. This function does the reading for us in the case there is not size
-information in the header for the embedded file.
-returns: Byte array of the contents of the embedded file.
-*/
-
-static Bytef *hrd_inflate_str(pb_file *pbf, ub4 *csize, ub4 *usize) {
- Bytef *out_buff;
- Bytef *tmp;
- Bytef in_buff[RDSZ];
- unsigned int rdamt;
- int i;
- int zret;
-
- i = 1;
- out_buff = NULL;
- zret = Z_OK;
- while(zret != Z_STREAM_END && (rdamt = pb_read(pbf, in_buff, RDSZ)))
- {
- zs.avail_in = rdamt;
- zs.avail_out = 0;
- zs.next_in = in_buff;
- do {
- if((tmp = (Bytef *) realloc(out_buff, (RDSZ * i) + 1))) {
- out_buff = tmp;
- zs.next_out = &(out_buff[(RDSZ * (i - 1)) - zs.avail_out]);
- zs.avail_out += RDSZ;
- i++;
- }
- else {
- fprintf(stderr, "Realloc of out_buff failed.\n");
- fprintf(stderr, "Error: %s\n", strerror(errno));
- exit(1);
- }
- } while((zret = inflate(&zs, 0)) == Z_OK);
- report_str_error(zret);
- }
- pb_push(pbf, zs.next_in, zs.avail_in);
-
- out_buff[(RDSZ * (i - 1)) - zs.avail_out] = '\0';
- *usize = zs.total_out;
- *csize = zs.total_in;
-
- inflateReset(&zs);
-
- return out_buff;
-}
-
-/*
-Function name: inflate_string
-args: pbf Pointer to pushback handle for file.
- csize Pointer to compressed size of embedded file. May be 0 if not set.
- usize Pointer to uncompressed size of embedded file. May be 0 if not set.
-purpose: Decide the easiest (in computer terms) methos of decompressing this embedded
-file to a string.
-returns: Pointer to a string containing the decompressed contents of the embedded file.
-If csize and usize are not set set them to correct numbers.
-*/
-
-Bytef *inflate_string(pb_file *pbf, ub4 *csize, ub4 *usize) {
-Bytef *ret_buf;
-
- if(*csize && *usize) ret_buf = ez_inflate_str(pbf, *csize, *usize);
- else ret_buf = hrd_inflate_str(pbf, csize, usize);
-
- return ret_buf;
-}
generated by cgit v1.1 at 2025-08-10 06:16:44 +0000