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parse-options: add parse_options_check to validate option specs. 

It only searches for now for the dreaded LASTARG_DEFAULT | OPTARG
combination, but can be extended to check for any other forbidden
combination.

Options are checked each time we call parse_options_start.

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Pierre Habouzit 2009-06-09 10:23:44 +02:00 committed by Junio C Hamano
parent 9a8531eeba
commit cb9d398c35
1 changed files with 24 additions and 0 deletions
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24
parse-options.c
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@ -306,6 +306,28 @@ static void check_typos(const char *arg, const struct option *options)
}
}
static void parse_options_check(const struct option *opts)
{
int err = 0;
for (; opts->type != OPTION_END; opts++) {
if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
(opts->flags & PARSE_OPT_OPTARG)) {
if (opts->long_name) {
error("`--%s` uses incompatible flags "
"LASTARG_DEFAULT and OPTARG", opts->long_name);
} else {
error("`-%c` uses incompatible flags "
"LASTARG_DEFAULT and OPTARG", opts->short_name);
}
err |= 1;
}
}
if (err)
exit(129);
}
void parse_options_start(struct parse_opt_ctx_t *ctx,
int argc, const char **argv, const char *prefix,
int flags)
@ -331,6 +353,8 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
{
int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
parse_options_check(options);
/* we must reset ->opt, unknown short option leave it dangling */
ctx->opt = NULL;