[PATCH 1/3] count: Convert to new-style argument parsing
Jani Nikula
jani at nikula.org
Wed Jan 11 00:17:05 PST 2012
On Wed, 11 Jan 2012 00:02:51 -0500, Austin Clements <amdragon at MIT.EDU> wrote:
> ---
> notmuch-count.c | 53 +++++++++++++++++++++++++----------------------------
> 1 files changed, 25 insertions(+), 28 deletions(-)
>
> diff --git a/notmuch-count.c b/notmuch-count.c
> index 20ce334..fb7401b 100644
> --- a/notmuch-count.c
> +++ b/notmuch-count.c
> @@ -21,6 +21,11 @@
>
> #include "notmuch-client.h"
>
> +typedef enum {
> + OUTPUT_THREADS,
> + OUTPUT_MESSAGES,
> +} output_t;
> +
> int
> notmuch_count_command (void *ctx, int argc, char *argv[])
> {
> @@ -28,35 +33,23 @@ notmuch_count_command (void *ctx, int argc, char *argv[])
> notmuch_database_t *notmuch;
> notmuch_query_t *query;
> char *query_str;
> - int i;
> - notmuch_bool_t output_messages = TRUE;
> + int opt_index;
> + output_t output = OUTPUT_MESSAGES;
>
> - argc--; argv++; /* skip subcommand argument */
> + notmuch_opt_desc_t options[] = {
> + { NOTMUCH_OPT_KEYWORD, &output, "output", 'o',
> + (notmuch_keyword_t []){ { "threads", OUTPUT_THREADS },
> + { "messages", OUTPUT_MESSAGES },
> + { 0, 0 } } },
To be pedantic, parse_arguments() expects 'output_var' to be a pointer
to int for NOTMUCH_OPT_KEYWORD. sizeof(enum) is implementation
dependent. I would forget about output_t typedef, use plain enum, and
int type for 'output'.
In fact, this is exactly what I did in commits
e6d89ad723f775952d89d4f81b6072617c5caf18 and
be5619cca32452f1a398add85908d78d6e72f469. In the latter I could have
used notmuch_bool_t because it's a typedeffed int, but then I would've
depended on some external typedef not changing (it probably won't, but
this is defensive programming).
Otherwise, looks good.
BR,
Jani.
> + { 0, 0, 0, 0, 0 }
> + };
>
> - for (i = 0; i < argc && argv[i][0] == '-'; i++) {
> - if (strcmp (argv[i], "--") == 0) {
> - i++;
> - break;
> - }
> - if (STRNCMP_LITERAL (argv[i], "--output=") == 0) {
> - const char *opt = argv[i] + sizeof ("--output=") - 1;
> - if (strcmp (opt, "threads") == 0) {
> - output_messages = FALSE;
> - } else if (strcmp (opt, "messages") == 0) {
> - output_messages = TRUE;
> - } else {
> - fprintf (stderr, "Invalid value for --output: %s\n", opt);
> - return 1;
> - }
> - } else {
> - fprintf (stderr, "Unrecognized option: %s\n", argv[i]);
> - return 1;
> - }
> + opt_index = parse_arguments (argc, argv, options, 1);
> +
> + if (opt_index < 0) {
> + return 1;
> }
>
> - argc -= i;
> - argv += i;
> -
> config = notmuch_config_open (ctx, NULL, NULL);
> if (config == NULL)
> return 1;
> @@ -66,7 +59,7 @@ notmuch_count_command (void *ctx, int argc, char *argv[])
> if (notmuch == NULL)
> return 1;
>
> - query_str = query_string_from_args (ctx, argc, argv);
> + query_str = query_string_from_args (ctx, argc-opt_index, argv+opt_index);
> if (query_str == NULL) {
> fprintf (stderr, "Out of memory.\n");
> return 1;
> @@ -82,10 +75,14 @@ notmuch_count_command (void *ctx, int argc, char *argv[])
> return 1;
> }
>
> - if (output_messages)
> + switch (output) {
> + case OUTPUT_MESSAGES:
> printf ("%u\n", notmuch_query_count_messages (query));
> - else
> + break;
> + case OUTPUT_THREADS:
> printf ("%u\n", notmuch_query_count_threads (query));
> + break;
> + }
>
> notmuch_query_destroy (query);
> notmuch_database_close (notmuch);
> --
> 1.7.7.3
>
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