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Diffstat (limited to 'lzo/tests/align.c')
| -rw-r--r-- | lzo/tests/align.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/lzo/tests/align.c b/lzo/tests/align.c new file mode 100644 index 00000000..1b2c5406 --- /dev/null +++ b/lzo/tests/align.c @@ -0,0 +1,205 @@ +/* align.c -- test alignment (important for 16-bit systems) + + This file is part of the LZO real-time data compression library. + + 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/ + */ + + +#if 0 +#include "src/lzo_conf.h" +#include "src/lzo_ptr.h" +#endif +#include "lzo/lzoconf.h" + +/* utility layer */ +#define WANT_LZO_MALLOC 1 +#include "examples/portab.h" + + +int opt_verbose = 0; + + +/************************************************************************* +// +**************************************************************************/ + +long align_test(lzo_bytep block, lzo_uint len, lzo_uint step) +{ + lzo_bytep b1 = block; + lzo_bytep b2 = block; + lzo_bytep k1 = NULL; + lzo_bytep k2 = NULL; + lzo_bytep k; + lzo_bytep x; + lzo_uint offset = 0; + long i = 0; + + assert(step > 0); + assert(step <= 65536L); + assert((step & (step - 1)) == 0); + + for (offset = step; offset < len; offset += step) + { + k1 = LZO_PTR_ALIGN_UP(b1+1,step); + k2 = b2 + offset; + if (k1 != k2) + { + printf("error 1: i %ld step %ld offset %ld: " + "%p (%ld) %p (%ld)\n", + i, (long) step, (long) offset, + k1, (long) (k1 - block), + k2, (long) (k2 - block)); + return 0; + } + if (k1 - step != b1) + { + printf("error 2: i %ld step %ld offset %ld: " + "%p (%ld) %p (%ld)\n", + i, (long) step, (long) offset, + b1, (long) (b1 - block), + k1, (long) (k1 - block)); + return 0; + } + + assert(k1 > b1); + assert(k2 > b2); + assert((lzo_uint)(k2 - b2) == offset); + assert(k1 - offset == b2); +#if defined(PTR_ALIGNED_4) + if (step == 4) + { + assert(PTR_ALIGNED_4(k1)); + assert(PTR_ALIGNED_4(k2)); + assert(PTR_ALIGNED2_4(k1,k2)); + } +#endif +#if defined(PTR_ALIGNED_8) + if (step == 8) + { + assert(PTR_ALIGNED_8(k1)); + assert(PTR_ALIGNED_8(k2)); + assert(PTR_ALIGNED2_8(k1,k2)); + } +#endif +#if defined(PTR_LINEAR) + assert((PTR_LINEAR(k1) & (step-1)) == 0); + assert((PTR_LINEAR(k2) & (step-1)) == 0); +#endif + + for (k = b1 + 1; k <= k1; k++) + { + x = LZO_PTR_ALIGN_UP(k,step); + if (x != k1) + { + printf("error 3: base: %p %p %p i %ld step %ld offset %ld: " + "%p (%ld) %p (%ld) %p (%ld)\n", + block, b1, b2, + i, (long) step, (long) offset, + k1, (long) (k1 - block), + k, (long) (k - block), + x, (long) (x - block)); + return 0; + } + } + + b1 = k1; + i++; + } + + return i; +} + + +/************************************************************************* +// +**************************************************************************/ + +#define BLOCK_LEN (128*1024L) + +int main(int argc, char *argv[]) +{ + lzo_bytep buf; + lzo_uint step; + + if (argc >= 2 && strcmp(argv[1],"-v") == 0) + opt_verbose = 1; + + if (lzo_init() != LZO_E_OK) + { + printf("lzo_init() failed !!!\n"); + return 3; + } + buf = (lzo_bytep) lzo_malloc(2*BLOCK_LEN + 256); + if (buf == NULL) + { + printf("out of memory\n"); + return 2; + } + + printf("Align init: %p ( 0x%lx )\n", buf, (unsigned long) buf); + + for (step = 1; step <= 65536L; step *= 2) + { + lzo_bytep block = buf; + long n; + unsigned gap; + + gap = __lzo_align_gap(block,step); + block = LZO_PTR_ALIGN_UP(block,step); + if (opt_verbose >= 1) + printf("STEP %5ld: GAP: %5lu %p %p %5ld\n", + (long) step, (long) gap, buf, block, + (long) (block - buf)); + n = align_test(block,BLOCK_LEN,step); + if (n == 0) + return 1; + if ((n + 1) * step != BLOCK_LEN) + { + printf("error 4: %ld %ld\n",(long)step,n); + return 1; + } + } + + lzo_free(buf); + printf("Alignment test passed.\n"); + return 0; +} + + +/* +vi:ts=4:et +*/ + |