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BAT: Change comments and interface of usage()

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1. Change comment strings to make the descriptions more clear;
2. Add indent for option lines that have no indent;
3. Use a const string instead of argv[0] as program name.

Signed-off-by: Lu, Han <han.lu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Lu, Han 2015-10-20 16:45:47 +08:00 committed by Takashi Iwai
parent 8c910830f0
commit 5a48606d94
1 changed files with 19 additions and 20 deletions
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39
bat/bat.c
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@ -268,28 +268,27 @@ static void test_capture(struct bat *bat)
}
}
static void usage(struct bat *bat, char *argv[])
static void usage(struct bat *bat)
{
fprintf(bat->log,
_("Usage:%s [Option]...\n"
_("Usage: bat [-options]...\n"
"\n"
"-h, --help help\n"
"-D sound card\n"
"-P playback pcm\n"
"-C capture pcm\n"
"-f sample size\n"
"-c number of channels\n"
"-r sampling rate\n"
"-n frames to capture\n"
"-k sigma k\n"
"-F target frequency\n"
"-p total number of periods to play/capture\n"
" --log=# path of log file. if not set, logs be put to stdout,\n"
" and errors be put to stderr.\n"
" --file=# input file\n"
" --saveplay=# save playback content to target file, for debug\n"
" --local internal loop, bypass hardware\n"
), argv[0]);
" -h, --help this help\n"
" -D pcm device for both playback and capture\n"
" -P pcm device for playback\n"
" -C pcm device for capture\n"
" -f sample format\n"
" -c number of channels\n"
" -r sampling rate\n"
" -n frames to playback or capture\n"
" -k parameter for frequency detecting threshold\n"
" -F target frequency\n"
" -p total number of periods to play/capture\n"
" --log=# file that both stdout and strerr redirecting to\n"
" --file=# file for playback\n"
" --saveplay=# file that storing playback content, for debug\n"
" --local internal loop, set to bypass pcm hardware devices\n"
));
fprintf(bat->log, _("Recognized sample formats are: %s %s %s %s\n"),
snd_pcm_format_name(SND_PCM_FORMAT_U8),
snd_pcm_format_name(SND_PCM_FORMAT_S16_LE),
@ -401,7 +400,7 @@ static void parse_arguments(struct bat *bat, int argc, char *argv[])
break;
case 'h':
default:
usage(bat, argv);
usage(bat);
exit(EXIT_SUCCESS);
}
}