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ext/xxHash/xxhsum.1.md  view on Meta::CPAN

* `-b`:
  Benchmark mode.  See [EXAMPLES](#EXAMPLES) for details.

* `-B`<BLOCKSIZE>:
  Only useful for benchmark mode (`-b`). See [EXAMPLES](#EXAMPLES) for details.
  <BLOCKSIZE> specifies benchmark mode's test data block size in bytes.
  Default value is 102400

* `-i`<ITERATIONS>:
  Only useful for benchmark mode (`-b`). See [EXAMPLES](#EXAMPLES) for details.
  <ITERATIONS> specifies number of iterations in benchmark. Single iteration
  takes at least 2500 milliseconds. Default value is 3

EXIT STATUS
-----------

`xxhsum` exit `0` on success, `1` if at least one file couldn't be read or
doesn't have the same checksum as the `-c` option.

EXAMPLES
--------

ext/xxHash/xxhsum.c  view on Meta::CPAN

#define EXPAND_AND_QUOTE(str) QUOTE(str)
#define PROGRAM_VERSION EXPAND_AND_QUOTE(LIB_VERSION)
static const int g_nbBits = (int)(sizeof(void*)*8);
static const char g_lename[] = "little endian";
static const char g_bename[] = "big endian";
#define ENDIAN_NAME (BMK_isLittleEndian() ? g_lename : g_bename)
#define COMPILED __DATE__
static const char author[] = "Yann Collet";
#define WELCOME_MESSAGE(exename) "%s %s (%i-bits %s), by %s (%s) \n", exename, PROGRAM_VERSION,  g_nbBits, ENDIAN_NAME, author, COMPILED

#define NBLOOPS    3                              /* Default number of benchmark iterations */
#define TIMELOOP_S 1
#define TIMELOOP  (TIMELOOP_S * CLOCKS_PER_SEC)   /* Minimum timing per iteration */
#define XXHSUM32_DEFAULT_SEED 0                   /* Default seed for algo_xxh32 */
#define XXHSUM64_DEFAULT_SEED 0                   /* Default seed for algo_xxh64 */

#define KB *( 1<<10)
#define MB *( 1<<20)
#define GB *(1U<<30)

#define MAX_MEM    (2 GB - 64 MB)

ext/xxHash/xxhsum.c  view on Meta::CPAN

static int usage_advanced(const char* exename)
{
    usage(exename);
    DISPLAY( "Advanced :\n");
    DISPLAY( " --little-endian : hash printed using little endian convention (default: big endian)\n");
    DISPLAY( " -V, --version   : display version\n");
    DISPLAY( " -h, --help      : display long help and exit\n");
    DISPLAY( " -b  : benchmark mode \n");
    DISPLAY( " -i# : number of iterations (benchmark mode; default %i)\n", g_nbIterations);
    DISPLAY( "\n");
    DISPLAY( "The following four options are useful only when verifying checksums (-c):\n");
    DISPLAY( "--strict : don't print OK for each successfully verified file\n");
    DISPLAY( "--status : don't output anything, status code shows success\n");
    DISPLAY( "--quiet  : exit non-zero for improperly formatted checksum lines\n");
    DISPLAY( "--warn   : warn about improperly formatted checksum lines\n");
    return 0;
}

static int badusage(const char* exename)