diff options
Diffstat (limited to 'test/ipedec.c')
| -rw-r--r-- | test/ipedec.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/test/ipedec.c b/test/ipedec.c index 800905f..5994fee 100644 --- a/test/ipedec.c +++ b/test/ipedec.c @@ -34,6 +34,11 @@ static int read_raw_file(const char *filename, char **buffer, size_t *length) return 0; } +static void usage(void) +{ + printf("usage: ipedec [--num-rows=ROWS] [--clear-frame] FILE [FILE ...]\n"); +} + static void process_file(const char *filename, int rows, int clear_frame) { char *buffer = NULL; @@ -100,14 +105,19 @@ int main(int argc, char const* argv[]) static struct option long_options[] = { { "num-rows", required_argument, 0, 'r' }, { "clear-frame", no_argument, 0, 'c' }, - { "help", no_argument, 0, '?' }, + { "help", no_argument, 0, 'h' }, { 0, 0, 0, 0 } }; int clear_frame = 0; int rows = -1; - while ((getopt_ret = getopt_long(argc, (char *const *) argv, "r:c:?", long_options, &index)) != -1) { + if (argc == 1) { + printf("ipedec: no input files\n"); + return 0; + } + + while ((getopt_ret = getopt_long(argc, (char *const *) argv, "r:c:h", long_options, &index)) != -1) { switch (getopt_ret) { case 'r': rows = atoi(optarg); @@ -115,6 +125,9 @@ int main(int argc, char const* argv[]) case 'c': clear_frame = 1; break; + case 'h': + usage(); + return 0; default: break; } |