Function usage

freebsd/contrib/zstd/programs/zstdcli.c:113–133

-************************************ * Command Line **************************************/ print help either in `stderr` or `stdout` depending on originating request * error (badusage) => stderr * help (usage_advanced) => stdout */

 * help (usage_advanced) => stdout
 */
static void usage(FILE* f, const char* programName)
{
    DISPLAY_F(f, "Usage : \n");
    DISPLAY_F(f, "      %s [args] [FILE(s)] [-o file] \n", programName);
    DISPLAY_F(f, "\n");
    DISPLAY_F(f, "FILE    : a filename \n");
    DISPLAY_F(f, "          with no FILE, or when FILE is - , read standard input\n");
    DISPLAY_F(f, "Arguments : \n");
#ifndef ZSTD_NOCOMPRESS
    DISPLAY_F(f, " -#     : # compression level (1-%d, default: %d) \n", ZSTDCLI_CLEVEL_MAX, ZSTDCLI_CLEVEL_DEFAULT);
#endif
#ifndef ZSTD_NODECOMPRESS
    DISPLAY_F(f, " -d     : decompression \n");
#endif
    DISPLAY_F(f, " -D DICT: use DICT as Dictionary for compression or decompression \n");
    DISPLAY_F(f, " -o file: result stored into `file` (only 1 output file) \n");
    DISPLAY_F(f, " -f     : overwrite output without prompting, also (de)compress links \n");
    DISPLAY_F(f, "--rm    : remove source file(s) after successful de/compression \n");
    DISPLAY_F(f, " -k     : preserve source file(s) (default) \n");
    DISPLAY_F(f, " -h/-H  : display help/long help and exit \n");
}

static void usage_advanced(const char* programName)
{