diff options
Diffstat (limited to 'examples/overlap.c')
| -rw-r--r-- | examples/overlap.c | 74 |
1 files changed, 27 insertions, 47 deletions
diff --git a/examples/overlap.c b/examples/overlap.c index b233768..114fe3b 100644 --- a/examples/overlap.c +++ b/examples/overlap.c @@ -2,22 +2,7 @@ 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 + Copyright (C) 1996-2014 Markus Franz Xaver Johannes Oberhumer All Rights Reserved. The LZO library is free software; you can redistribute it and/or @@ -71,15 +56,7 @@ static const char *progname = NULL; * will be needed. See step 4a) below. */ -static lzo_uint opt_overhead = 0; /* assume worst case */ - - -#if 0 && defined(LZO_USE_ASM) - /* just for testing */ -# include <lzo_asm.h> -# define lzo1x_decompress lzo1x_decompress_asm_fast -#endif - +static long opt_overhead = 0; /* assume worst case */ static unsigned long total_files = 0; static unsigned long total_in = 0; @@ -89,7 +66,7 @@ static unsigned long total_in = 0; // **************************************************************************/ -int do_file ( const char *in_name ) +static int do_file(const char *in_name) { int r; FILE *fp = NULL; @@ -127,6 +104,11 @@ int do_file ( const char *in_name ) goto next_file; } in_len = (lzo_uint) l; + if ((long) in_len != l || l > 256L * 1024L * 1024L) + { + printf("%s: %s: file is too big -- skipping\n", progname, in_name); + goto next_file; + } /* * Step 2: allocate compression buffers and read the file @@ -144,14 +126,14 @@ int do_file ( const char *in_name ) /* * Step 3: compress from 'in' to 'out' with LZO1X-1 */ - r = lzo1x_1_compress(in,in_len,out,&out_len,wrkmem); + 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); exit(1); } - printf("%-26s %8lu -> %8lu\n", "LZO1X-1:", (unsigned long) in_len, (unsigned long) out_len); + printf("%-25s %8lu -> %8lu\n", "LZO1X-1:", (unsigned long) in_len, (unsigned long) out_len); /***** Step 4: overlapping compression *****/ @@ -174,18 +156,18 @@ int do_file ( const char *in_name ) /* * Step 4c: do an in-place compression within the 'overlap' buffer */ - r = lzo1x_1_compress(overlap+offset,in_len,overlap,&new_len,wrkmem); + r = lzo1x_1_compress(overlap + offset, in_len, overlap, &new_len, wrkmem); if (r != LZO_E_OK) { /* this should NEVER happen */ - printf("overlapping compression failed: %d\n", r); + printf("in-place compression failed: %d\n", r); exit(1); } /* * Step 4d: verify overlapping compression */ - if (new_len != out_len || lzo_memcmp(out,overlap,out_len) != 0) + if (new_len != out_len || lzo_memcmp(out, overlap, out_len) != 0) { /* As compression is non-deterministic there can be a difference * in the representation of the compressed data (but this usually @@ -198,18 +180,18 @@ int do_file ( const char *in_name ) if (r != LZO_E_OK || ll != in_len || lzo_memcmp(in, tmp, ll) != 0) { /* this should NEVER happen */ - printf("overlapping compression data error\n"); + printf("in-place compression data error\n"); exit(1); } lzo_free(tmp); } - printf("overlapping compression: %8lu -> %8lu overhead: %7lu\n", + printf(" in-place compression: %8lu -> %8lu overhead: %7lu\n", (unsigned long) in_len, (unsigned long) new_len, (unsigned long) overhead); lzo_free(overlap); overlap = NULL; -/***** Step 5: overlapping decompression *****/ +/***** Step 5: in-place decompression *****/ /* * Step 5a: allocate the 'overlap' buffer for in-place decompression @@ -217,7 +199,7 @@ int do_file ( const char *in_name ) if (opt_overhead == 0 || out_len >= in_len) overhead = in_len / 16 + 64 + 3; else - overhead = opt_overhead; + overhead = (lzo_uint) opt_overhead; overlap = (lzo_bytep) xmalloc(in_len + overhead); /* @@ -231,24 +213,24 @@ int do_file ( const char *in_name ) * Step 5c: do an in-place decompression within the 'overlap' buffer */ new_len = in_len; - r = lzo1x_decompress(overlap+offset,out_len,overlap,&new_len,NULL); + r = lzo1x_decompress_safe(overlap + offset, out_len, overlap, &new_len, NULL); if (r != LZO_E_OK) { /* this may happen if overhead is too small */ - printf("overlapping decompression failed: %d - increase 'opt_overhead'\n", r); + printf("in-place decompression failed: %d - increase 'opt_overhead'\n", r); exit(1); } /* * Step 5d: verify decompression */ - if (new_len != in_len || lzo_memcmp(in,overlap,in_len) != 0) + if (new_len != in_len || lzo_memcmp(in, overlap, in_len) != 0) { /* this may happen if overhead is too small */ - printf("overlapping decompression data error - increase 'opt_overhead'\n"); + printf("in-place decompression data error - increase 'opt_overhead'\n"); exit(1); } - printf("overlapping decompression: %8lu -> %8lu overhead: %7lu\n", + printf(" in-place decompression: %8lu -> %8lu overhead: %7lu\n", (unsigned long) out_len, (unsigned long) new_len, (unsigned long) overhead); lzo_free(overlap); overlap = NULL; @@ -277,15 +259,15 @@ int __lzo_cdecl_main main(int argc, char *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"); + printf("Copyright (C) 1996-2014 Markus Franz Xaver Johannes Oberhumer\nAll Rights Reserved.\n\n"); progname = argv[0]; if (i < argc && argv[i][0] == '-') - opt_overhead = atoi(&argv[i++][1]); + opt_overhead = atol(&argv[i++][1]); #if 1 - if (opt_overhead != 0 && opt_overhead < 8) + if (opt_overhead != 0 && opt_overhead < 4) { - printf("%s: invalid overhead value %ld\n", progname, (long)opt_overhead); + printf("%s: invalid overhead value %ld\n", progname, opt_overhead); exit(1); } #endif @@ -316,7 +298,5 @@ int __lzo_cdecl_main main(int argc, char *argv[]) return r; } -/* -vi:ts=4:et -*/ +/* vim:set ts=4 sw=4 et: */ |