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Diffstat (limited to 'lzo/examples/lzopack.c')
-rw-r--r--lzo/examples/lzopack.c645
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diff --git a/lzo/examples/lzopack.c b/lzo/examples/lzopack.c
deleted file mode 100644
index e4e745df..00000000
--- a/lzo/examples/lzopack.c
+++ /dev/null
@@ -1,645 +0,0 @@
-/* lzopack.c -- LZO example program: a simple file packer
-
- This file is part of the LZO real-time data compression library.
-
- Copyright (C) 2011 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2010 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2009 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
- Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
- All Rights Reserved.
-
- The LZO library 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.
-
- The LZO library 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 the LZO library; see the file COPYING.
- If not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-
- Markus F.X.J. Oberhumer
- <markus@oberhumer.com>
- http://www.oberhumer.com/opensource/lzo/
- */
-
-
-/*************************************************************************
-// NOTE: this is an example program, so do not use to backup your data.
-//
-// This program lacks things like sophisticated file handling but is
-// pretty complete regarding compression - it should provide a good
-// starting point for adaption for your applications.
-//
-// Please study LZO.FAQ and simple.c first.
-**************************************************************************/
-
-#include "lzo/lzoconf.h"
-#include "lzo/lzo1x.h"
-
-/* portability layer */
-static const char *progname = NULL;
-#define WANT_LZO_MALLOC 1
-#define WANT_LZO_FREAD 1
-#define WANT_LZO_WILDARGV 1
-#define WANT_XMALLOC 1
-#include "examples/portab.h"
-
-
-static unsigned long total_in = 0;
-static unsigned long total_out = 0;
-static lzo_bool opt_debug = 0;
-
-/* magic file header for lzopack-compressed files */
-static const unsigned char magic[7] =
- { 0x00, 0xe9, 0x4c, 0x5a, 0x4f, 0xff, 0x1a };
-
-
-/*************************************************************************
-// file IO
-**************************************************************************/
-
-lzo_uint xread(FILE *fp, lzo_voidp buf, lzo_uint len, lzo_bool allow_eof)
-{
- lzo_uint l;
-
- l = (lzo_uint) lzo_fread(fp, buf, len);
- if (l > len)
- {
- fprintf(stderr, "\nsomething's wrong with your C library !!!\n");
- exit(1);
- }
- if (l != len && !allow_eof)
- {
- fprintf(stderr, "\nread error - premature end of file\n");
- exit(1);
- }
- total_in += (unsigned long) l;
- return l;
-}
-
-lzo_uint xwrite(FILE *fp, const lzo_voidp buf, lzo_uint len)
-{
- if (fp != NULL && lzo_fwrite(fp, buf, len) != len)
- {
- fprintf(stderr, "\nwrite error (disk full ?)\n");
- exit(1);
- }
- total_out += (unsigned long) len;
- return len;
-}
-
-
-int xgetc(FILE *fp)
-{
- unsigned char c;
- xread(fp, (lzo_voidp) &c, 1, 0);
- return c;
-}
-
-void xputc(FILE *fp, int c)
-{
- unsigned char cc = (unsigned char) (c & 0xff);
- xwrite(fp, (const lzo_voidp) &cc, 1);
-}
-
-/* read and write portable 32-bit integers */
-
-lzo_uint32 xread32(FILE *fp)
-{
- unsigned char b[4];
- lzo_uint32 v;
-
- xread(fp, b, 4, 0);
- v = (lzo_uint32) b[3] << 0;
- v |= (lzo_uint32) b[2] << 8;
- v |= (lzo_uint32) b[1] << 16;
- v |= (lzo_uint32) b[0] << 24;
- return v;
-}
-
-void xwrite32(FILE *fp, lzo_xint v)
-{
- unsigned char b[4];
-
- b[3] = (unsigned char) ((v >> 0) & 0xff);
- b[2] = (unsigned char) ((v >> 8) & 0xff);
- b[1] = (unsigned char) ((v >> 16) & 0xff);
- b[0] = (unsigned char) ((v >> 24) & 0xff);
- xwrite(fp, b, 4);
-}
-
-
-/*************************************************************************
-// compress
-//
-// possible improvement: we could use overlapping compression to
-// save some memory - see overlap.c. This would require some minor
-// changes in the decompression code as well, because if a block
-// turns out to be incompressible we would still have to store it in its
-// "compressed" (i.e. then slightly enlarged) form because the original
-// (uncompressed) data would have been lost during the overlapping
-// compression.
-**************************************************************************/
-
-int do_compress(FILE *fi, FILE *fo, int compression_level, lzo_uint block_size)
-{
- int r = 0;
- lzo_bytep in = NULL;
- lzo_bytep out = NULL;
- lzo_voidp wrkmem = NULL;
- lzo_uint in_len;
- lzo_uint out_len;
- lzo_uint32 wrk_len = 0;
- lzo_uint32 flags = 1; /* do compute a checksum */
- int method = 1; /* compression method: LZO1X */
- lzo_uint32 checksum;
-
- total_in = total_out = 0;
-
-/*
- * Step 1: write magic header, flags & block size, init checksum
- */
- xwrite(fo, magic, sizeof(magic));
- xwrite32(fo, flags);
- xputc(fo, method); /* compression method */
- xputc(fo, compression_level); /* compression level */
- xwrite32(fo, block_size);
- checksum = lzo_adler32(0, NULL, 0);
-
-/*
- * Step 2: allocate compression buffers and work-memory
- */
- in = (lzo_bytep) xmalloc(block_size);
- out = (lzo_bytep) xmalloc(block_size + block_size / 16 + 64 + 3);
- if (compression_level == 9)
- wrk_len = LZO1X_999_MEM_COMPRESS;
- else
- wrk_len = LZO1X_1_MEM_COMPRESS;
- wrkmem = (lzo_voidp) xmalloc(wrk_len);
- if (in == NULL || out == NULL || wrkmem == NULL)
- {
- printf("%s: out of memory\n", progname);
- r = 1;
- goto err;
- }
-
-/*
- * Step 3: process blocks
- */
- for (;;)
- {
- /* read block */
- in_len = xread(fi, in, block_size, 1);
- if (in_len == 0)
- break;
-
- /* update checksum */
- if (flags & 1)
- checksum = lzo_adler32(checksum, in, in_len);
-
- /* clear wrkmem (not needed, only for debug/benchmark purposes) */
- if (opt_debug)
- lzo_memset(wrkmem, 0xff, wrk_len);
-
- /* compress block */
- if (compression_level == 9)
- r = lzo1x_999_compress(in, in_len, out, &out_len, wrkmem);
- else
- r = lzo1x_1_compress(in, in_len, out, &out_len, wrkmem);
- if (r != LZO_E_OK || out_len > in_len + in_len / 16 + 64 + 3)
- {
- /* this should NEVER happen */
- printf("internal error - compression failed: %d\n", r);
- r = 2;
- goto err;
- }
-
- /* write uncompressed block size */
- xwrite32(fo, in_len);
-
- if (out_len < in_len)
- {
- /* write compressed block */
- xwrite32(fo, out_len);
- xwrite(fo, out, out_len);
- }
- else
- {
- /* not compressible - write uncompressed block */
- xwrite32(fo, in_len);
- xwrite(fo, in, in_len);
- }
- }
-
- /* write EOF marker */
- xwrite32(fo, 0);
-
- /* write checksum */
- if (flags & 1)
- xwrite32(fo, checksum);
-
- r = 0;
-err:
- lzo_free(wrkmem);
- lzo_free(out);
- lzo_free(in);
- return r;
-}
-
-
-/*************************************************************************
-// decompress / test
-//
-// We are using overlapping (in-place) decompression to save some
-// memory - see overlap.c.
-**************************************************************************/
-
-int do_decompress(FILE *fi, FILE *fo)
-{
- int r = 0;
- lzo_bytep buf = NULL;
- lzo_uint buf_len;
- unsigned char m [ sizeof(magic) ];
- lzo_uint32 flags;
- int method;
- int compression_level;
- lzo_uint block_size;
- lzo_uint32 checksum;
-
- total_in = total_out = 0;
-
-/*
- * Step 1: check magic header, read flags & block size, init checksum
- */
- if (xread(fi, m, sizeof(magic),1) != sizeof(magic) ||
- memcmp(m, magic, sizeof(magic)) != 0)
- {
- printf("%s: header error - this file is not compressed by lzopack\n", progname);
- r = 1;
- goto err;
- }
- flags = xread32(fi);
- method = xgetc(fi);
- compression_level = xgetc(fi);
- if (method != 1)
- {
- printf("%s: header error - invalid method %d (level %d)\n",
- progname, method, compression_level);
- r = 2;
- goto err;
- }
- block_size = xread32(fi);
- if (block_size < 1024 || block_size > 8*1024*1024L)
- {
- printf("%s: header error - invalid block size %ld\n",
- progname, (long) block_size);
- r = 3;
- goto err;
- }
- checksum = lzo_adler32(0,NULL,0);
-
-/*
- * Step 2: allocate buffer for in-place decompression
- */
- buf_len = block_size + block_size / 16 + 64 + 3;
- buf = (lzo_bytep) xmalloc(buf_len);
- if (buf == NULL)
- {
- printf("%s: out of memory\n", progname);
- r = 4;
- goto err;
- }
-
-/*
- * Step 3: process blocks
- */
- for (;;)
- {
- lzo_bytep in;
- lzo_bytep out;
- lzo_uint in_len;
- lzo_uint out_len;
-
- /* read uncompressed size */
- out_len = xread32(fi);
-
- /* exit if last block (EOF marker) */
- if (out_len == 0)
- break;
-
- /* read compressed size */
- in_len = xread32(fi);
-
- /* sanity check of the size values */
- if (in_len > block_size || out_len > block_size ||
- in_len == 0 || in_len > out_len)
- {
- printf("%s: block size error - data corrupted\n", progname);
- r = 5;
- goto err;
- }
-
- /* place compressed block at the top of the buffer */
- in = buf + buf_len - in_len;
- out = buf;
-
- /* read compressed block data */
- xread(fi, in, in_len, 0);
-
- if (in_len < out_len)
- {
- /* decompress - use safe decompressor as data might be corrupted
- * during a file transfer */
- lzo_uint new_len = out_len;
-
- r = lzo1x_decompress_safe(in, in_len, out, &new_len, NULL);
- if (r != LZO_E_OK || new_len != out_len)
- {
- printf("%s: compressed data violation\n", progname);
- r = 6;
- goto err;
- }
- /* write decompressed block */
- xwrite(fo, out, out_len);
- /* update checksum */
- if (flags & 1)
- checksum = lzo_adler32(checksum, out, out_len);
- }
- else
- {
- /* write original (incompressible) block */
- xwrite(fo, in, in_len);
- /* update checksum */
- if (flags & 1)
- checksum = lzo_adler32(checksum, in, in_len);
- }
- }
-
- /* read and verify checksum */
- if (flags & 1)
- {
- lzo_uint32 c = xread32(fi);
- if (c != checksum)
- {
- printf("%s: checksum error - data corrupted\n", progname);
- r = 7;
- goto err;
- }
- }
-
- r = 0;
-err:
- lzo_free(buf);
- return r;
-}
-
-
-/*************************************************************************
-//
-**************************************************************************/
-
-static void usage(void)
-{
- printf("usage: %s [-9] input-file output-file (compress)\n", progname);
- printf("usage: %s -d input-file output-file (decompress)\n", progname);
- printf("usage: %s -t input-file... (test)\n", progname);
- exit(1);
-}
-
-
-/* open input file */
-static FILE *xopen_fi(const char *name)
-{
- FILE *fp;
-
- fp = fopen(name, "rb");
- if (fp == NULL)
- {
- printf("%s: cannot open input file %s\n", progname, name);
- exit(1);
- }
-#if defined(HAVE_STAT) && defined(S_ISREG)
- {
- struct stat st;
- int is_regular = 1;
- if (stat(name, &st) != 0 || !S_ISREG(st.st_mode))
- is_regular = 0;
- if (!is_regular)
- {
- printf("%s: %s is not a regular file\n", progname, name);
- fclose(fp); fp = NULL;
- exit(1);
- }
- }
-#endif
- return fp;
-}
-
-
-/* open output file */
-static FILE *xopen_fo(const char *name)
-{
- FILE *fp;
-
-#if 0
- /* this is an example program, so make sure we don't overwrite a file */
- fp = fopen(name, "rb");
- if (fp != NULL)
- {
- printf("%s: file %s already exists -- not overwritten\n", progname, name);
- fclose(fp); fp = NULL;
- exit(1);
- }
-#endif
- fp = fopen(name, "wb");
- if (fp == NULL)
- {
- printf("%s: cannot open output file %s\n", progname, name);
- exit(1);
- }
- return fp;
-}
-
-
-/* close file */
-static void xclose(FILE *fp)
-{
- if (fp)
- {
- int err;
- err = ferror(fp);
- if (fclose(fp) != 0)
- err = 1;
- if (err)
- {
- printf("%s: error while closing file\n", progname);
- exit(1);
- }
- }
-}
-
-
-/*************************************************************************
-//
-**************************************************************************/
-
-int __lzo_cdecl_main main(int argc, char *argv[])
-{
- int i = 1;
- int r = 0;
- FILE *fi = NULL;
- FILE *fo = NULL;
- const char *in_name = NULL;
- const char *out_name = NULL;
- unsigned opt_decompress = 0;
- unsigned opt_test = 0;
- int opt_compression_level = 1;
- lzo_uint opt_block_size;
- const char *s;
-
- lzo_wildargv(&argc, &argv);
-
- progname = argv[0];
- for (s = progname; *s; s++)
- if ((*s == '/' || *s == '\\') && s[1])
- progname = s + 1;
-
- printf("\nLZO real-time data compression library (v%s, %s).\n",
- lzo_version_string(), lzo_version_date());
- printf("Copyright (C) 1996-2011 Markus Franz Xaver Johannes Oberhumer\nAll Rights Reserved.\n\n");
-
-#if 0
- printf(
-"*** DISCLAIMER ***\n"
-" This is an example program, do not use to backup your data !\n"
-" Get LZOP if you're interested into a full-featured packer.\n"
-" See http://www.oberhumer.com/opensource/lzop/\n"
-"\n");
-#endif
-
-
-/*
- * Step 1: initialize the LZO library
- */
- if (lzo_init() != LZO_E_OK)
- {
- printf("internal error - lzo_init() failed !!!\n");
- printf("(this usually indicates a compiler bug - try recompiling\nwithout optimizations, and enable '-DLZO_DEBUG' for diagnostics)\n");
- exit(1);
- }
-
-
-/*
- * Step 2: setup memory
- */
- opt_block_size = 256 * 1024L;
-
-#if defined(ACC_MM_AHSHIFT)
- /* reduce memory requirements for ancient 16-bit DOS 640kB real-mode */
- if (ACC_MM_AHSHIFT != 3)
- opt_block_size = 16 * 1024L;
-#endif
-
-
-/*
- * Step 3: get options
- */
-
- while (i < argc && argv[i][0] == '-')
- {
- if (strcmp(argv[i],"-d") == 0)
- opt_decompress = 1;
- else if (strcmp(argv[i],"-t") == 0)
- opt_test = 1;
- else if (strcmp(argv[i],"-9") == 0)
- opt_compression_level = 9;
- else if (argv[i][1] == 'b' && argv[i][2])
- {
- long b = atol(&argv[i][2]);
- if (b >= 1024L && b <= 8*1024*1024L)
- opt_block_size = (lzo_uint) b;
- else
- {
- printf("%s: invalid block_size in option '%s'.\n", progname, argv[i]);
- usage();
- }
- }
- else if (strcmp(argv[i],"--debug") == 0)
- opt_debug += 1;
- else
- usage();
- i++;
- }
- if (opt_test && i >= argc)
- usage();
- if (!opt_test && i + 2 != argc)
- usage();
-
-
-/*
- * Step 4: process file(s)
- */
-
- if (opt_test)
- {
- while (i < argc && r == 0)
- {
- in_name = argv[i++];
- fi = xopen_fi(in_name);
- r = do_decompress(fi, NULL);
- if (r == 0)
- printf("%s: %s tested ok (%lu -> %lu bytes)\n",
- progname, in_name, total_in, total_out);
- xclose(fi); fi = NULL;
- }
- }
- else if (opt_decompress)
- {
- in_name = argv[i++];
- out_name = argv[i++];
- fi = xopen_fi(in_name);
- fo = xopen_fo(out_name);
- r = do_decompress(fi, fo);
- if (r == 0)
- printf("%s: decompressed %lu into %lu bytes\n",
- progname, total_in, total_out);
- }
- else /* compress */
- {
- in_name = argv[i++];
- out_name = argv[i++];
- fi = xopen_fi(in_name);
- fo = xopen_fo(out_name);
- r = do_compress(fi, fo, opt_compression_level, opt_block_size);
- if (r == 0)
- printf("%s: compressed %lu into %lu bytes\n",
- progname, total_in, total_out);
- }
-
- xclose(fi); fi = NULL;
- xclose(fo); fo = NULL;
- return r;
-}
-
-/*
-vi:ts=4:et
-*/
-
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