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Diffstat (limited to 'lzo/examples/dict.c')
| -rw-r--r-- | lzo/examples/dict.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/lzo/examples/dict.c b/lzo/examples/dict.c deleted file mode 100644 index 04db2453..00000000 --- a/lzo/examples/dict.c +++ /dev/null @@ -1,281 +0,0 @@ -/* dict.c -- example program: how to use preset dictionaries - - 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/ - */ - - -/************************************************************************* -// This program shows how to use preset dictionaries. -// -// 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" - - -#define DICT_LEN 0xbfff -static lzo_bytep dict; -static lzo_uint dict_len = 0; -static lzo_uint32 dict_adler32; - - -/************************************************************************* -// -**************************************************************************/ - -static lzo_uint total_n = 0; -static lzo_uint total_c_len = 0; -static lzo_uint total_d_len = 0; - -static void print_file ( const char *name, lzo_uint d_len, lzo_uint c_len ) -{ - double perc; - - perc = (d_len > 0) ? c_len * 100.0 / d_len : 0; - printf(" | %-30s %9ld -> %9ld %7.2f%% |\n", - name, (long) d_len, (long) c_len, perc); - - total_n++; - total_c_len += c_len; - total_d_len += d_len; -} - - -/************************************************************************* -// -**************************************************************************/ - -int do_file ( const char *in_name, int compression_level ) -{ - int r; - lzo_bytep in; - lzo_bytep out; - lzo_bytep newb; - lzo_voidp wrkmem; - lzo_uint in_len; - lzo_uint out_len; - lzo_uint new_len; - long l; - FILE *fp; - -/* - * Step 1: open the input file - */ - fp = fopen(in_name,"rb"); - if (fp == 0) - { - printf("%s: cannot open file %s\n", progname, in_name); - return 0; /* no error */ - } - fseek(fp, 0, SEEK_END); - l = ftell(fp); - fseek(fp, 0, SEEK_SET); - if (l <= 0) - { - printf("%s: %s: empty file -- skipping\n", progname, in_name); - fclose(fp); fp = NULL; - return 0; - } - in_len = (lzo_uint) l; - -/* - * Step 2: allocate compression buffers and read the file - */ - in = (lzo_bytep) xmalloc(in_len); - out = (lzo_bytep) xmalloc(in_len + in_len / 16 + 64 + 3); - newb = (lzo_bytep) xmalloc(in_len); - wrkmem = (lzo_voidp) xmalloc(LZO1X_999_MEM_COMPRESS); - if (in == NULL || out == NULL || newb == NULL || wrkmem == NULL) - { - printf("%s: out of memory\n", progname); - exit(1); - } - in_len = (lzo_uint) lzo_fread(fp, in, in_len); - fclose(fp); fp = NULL; - -/* - * Step 3: compress from 'in' to 'out' with LZO1X-999 - */ - r = lzo1x_999_compress_level(in,in_len,out,&out_len,wrkmem, - dict, dict_len, 0, compression_level); - if (r != LZO_E_OK) - { - /* this should NEVER happen */ - printf("internal error - compression failed: %d\n", r); - return 1; - } - - print_file(in_name,in_len,out_len); - -/* - * Step 4: decompress again, now going from 'out' to 'newb' - */ - new_len = in_len; - r = lzo1x_decompress_dict_safe(out,out_len,newb,&new_len,NULL,dict,dict_len); - if (r != LZO_E_OK) - { - /* this should NEVER happen */ - printf("internal error - decompression failed: %d\n", r); - return 1; - } - -/* - * Step 5: verify decompression - */ - if (new_len != in_len || lzo_memcmp(in,newb,in_len) != 0) - { - /* this should NEVER happen */ - printf("internal error - decompression data error\n"); - return 1; - } - - /* free buffers in reverse order to help malloc() */ - lzo_free(wrkmem); - lzo_free(newb); - lzo_free(out); - lzo_free(in); - return 0; -} - - -/************************************************************************* -// -**************************************************************************/ - -int __lzo_cdecl_main main(int argc, char *argv[]) -{ - int i = 1; - int r; - const char *dict_name; - FILE *fp; - time_t t_total; - int compression_level = 7; - - lzo_wildargv(&argc, &argv); - - 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"); - - progname = argv[0]; - - if (i < argc && argv[i][0] == '-' && isdigit(argv[i][1])) - compression_level = atoi(&argv[i++][1]); - - if (i + 1 >= argc || compression_level < 1 || compression_level > 9) - { - printf("usage: %s [-level] [ dictionary-file | -n ] file...\n", progname); - exit(1); - } - printf("Compression level is LZO1X-999/%d\n", compression_level); - -/* - * 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: prepare the dictionary - */ - dict = (lzo_bytep) xmalloc(DICT_LEN); - if (dict == NULL) - { - printf("%s: out of memory\n", progname); - exit(1); - } - dict_name = argv[i++]; - if (strcmp(dict_name,"-n") == 0) - { - dict_name = "empty"; - dict_len = 0; - } - else - { - fp = fopen(dict_name,"rb"); - if (!fp) - { - printf("%s: cannot open dictionary file %s\n", progname, dict_name); - exit(1); - } - dict_len = (lzo_uint) lzo_fread(fp, dict, DICT_LEN); - fclose(fp); fp = NULL; - } - - dict_adler32 = lzo_adler32(0,NULL,0); - dict_adler32 = lzo_adler32(dict_adler32,dict,dict_len); - printf("Using dictionary '%s', %ld bytes, ID 0x%08lx.\n", - dict_name, (long) dict_len, (long) dict_adler32); - -/* - * Step 3: process files - */ - t_total = time(NULL); - for (r = 0; r == 0 && i < argc; i++) - r = do_file(argv[i], compression_level); - t_total = time(NULL) - t_total; - - lzo_free(dict); - - if (total_n > 1) - print_file("***TOTALS***",total_d_len,total_c_len); - - printf("Dictionary compression test %s, execution time %lu seconds.\n", - r == 0 ? "passed" : "FAILED", (unsigned long) t_total); - return r; -} - -/* -vi:ts=4:et -*/ - |