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Diffstat (limited to 'app/lzo/examples/simple.c')
| -rw-r--r-- | app/lzo/examples/simple.c | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/app/lzo/examples/simple.c b/app/lzo/examples/simple.c deleted file mode 100644 index 42f814a7..00000000 --- a/app/lzo/examples/simple.c +++ /dev/null @@ -1,156 +0,0 @@ -/* simple.c -- the annotated simple example program for the LZO library - - This file is part of the LZO real-time data compression library. - - Copyright (C) 1996-2014 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 the basic usage of the LZO library. -// We will compress a block of data and decompress again. -// -// See also LZO.FAQ -**************************************************************************/ - -/* We will be using the LZO1X-1 algorithm, so we have - * to include <lzo1x.h> - */ - -#include "lzo/lzoconf.h" -#include "lzo/lzo1x.h" - -/* portability layer */ -static const char *progname = NULL; -#define WANT_LZO_MALLOC 1 -#define WANT_XMALLOC 1 -#include "examples/portab.h" - - -/* We want to compress the data block at 'in' with length 'IN_LEN' to - * the block at 'out'. Because the input block may be incompressible, - * we must provide a little more output space in case that compression - * is not possible. - */ - -#ifndef IN_LEN -#define IN_LEN (128*1024L) -#endif -#define OUT_LEN (IN_LEN + IN_LEN / 16 + 64 + 3) - - -/************************************************************************* -// -**************************************************************************/ - -int __lzo_cdecl_main main(int argc, char *argv[]) -{ - int r; - lzo_bytep in; - lzo_bytep out; - lzo_voidp wrkmem; - lzo_uint in_len; - lzo_uint out_len; - lzo_uint new_len; - - if (argc < 0 && argv == NULL) /* avoid warning about unused args */ - return 0; - - printf("\nLZO real-time data compression library (v%s, %s).\n", - lzo_version_string(), lzo_version_date()); - printf("Copyright (C) 1996-2014 Markus Franz Xaver Johannes Oberhumer\nAll Rights Reserved.\n\n"); - -/* - * 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"); - return 4; - } - -/* - * Step 2: allocate blocks and the work-memory - */ - in = (lzo_bytep) xmalloc(IN_LEN); - out = (lzo_bytep) xmalloc(OUT_LEN); - wrkmem = (lzo_voidp) xmalloc(LZO1X_1_MEM_COMPRESS); - if (in == NULL || out == NULL || wrkmem == NULL) - { - printf("out of memory\n"); - return 3; - } - -/* - * Step 3: prepare the input block that will get compressed. - * We just fill it with zeros in this example program, - * but you would use your real-world data here. - */ - in_len = IN_LEN; - lzo_memset(in,0,in_len); - -/* - * Step 4: compress from 'in' to 'out' with LZO1X-1 - */ - r = lzo1x_1_compress(in, in_len, out, &out_len, wrkmem); - if (r == LZO_E_OK) - printf("compressed %lu bytes into %lu bytes\n", - (unsigned long) in_len, (unsigned long) out_len); - else - { - /* this should NEVER happen */ - printf("internal error - compression failed: %d\n", r); - return 2; - } - /* check for an incompressible block */ - if (out_len >= in_len) - { - printf("This block contains incompressible data.\n"); - return 0; - } - -/* - * Step 5: decompress again, now going from 'out' to 'in' - */ - new_len = in_len; - r = lzo1x_decompress(out, out_len, in, &new_len, NULL); - if (r == LZO_E_OK && new_len == in_len) - printf("decompressed %lu bytes back into %lu bytes\n", - (unsigned long) out_len, (unsigned long) in_len); - else - { - /* this should NEVER happen */ - printf("internal error - decompression failed: %d\n", r); - return 1; - } - - lzo_free(wrkmem); - lzo_free(out); - lzo_free(in); - printf("Simple compression test passed.\n"); - return 0; -} - - -/* vim:set ts=4 sw=4 et: */ |