parse-options: normalize arg and long_name before comparison
Strip "no-" from arg and long_name before comparing them. This way we
no longer have to repeat the comparison with an offset of 3 for negated
arguments.
Note that we must not modify the "flags" value, which tracks whether arg
is negated, inside the loop. When registering "--n", "--no" or "--no-"
as abbreviation for any negative option, we used to OR it with OPT_UNSET
and end the loop. We can simply hard-code OPT_UNSET and leave flags
unchanged instead.
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/parse-options.c b/parse-options.c
index 008c0f3..d45efa4 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -382,28 +382,42 @@ static enum parse_opt_result parse_long_opt(
const struct option *options)
{
const char *arg_end = strchrnul(arg, '=');
+ const char *arg_start = arg;
+ enum opt_parsed flags = OPT_LONG;
+ int arg_starts_with_no_no = 0;
struct parsed_option abbrev = { .option = NULL, .flags = OPT_LONG };
struct parsed_option ambiguous = { .option = NULL, .flags = OPT_LONG };
+ if (skip_prefix(arg_start, "no-", &arg_start)) {
+ if (skip_prefix(arg_start, "no-", &arg_start))
+ arg_starts_with_no_no = 1;
+ else
+ flags |= OPT_UNSET;
+ }
+
for (; options->type != OPTION_END; options++) {
const char *rest, *long_name = options->long_name;
- enum opt_parsed flags = OPT_LONG, opt_flags = OPT_LONG;
+ enum opt_parsed opt_flags = OPT_LONG;
+ int allow_unset = !(options->flags & PARSE_OPT_NONEG);
if (options->type == OPTION_SUBCOMMAND)
continue;
if (!long_name)
continue;
- if (!starts_with(arg, "no-") &&
- !(options->flags & PARSE_OPT_NONEG) &&
- skip_prefix(long_name, "no-", &long_name))
+ if (skip_prefix(long_name, "no-", &long_name))
opt_flags |= OPT_UNSET;
+ else if (arg_starts_with_no_no)
+ continue;
- if (!skip_prefix(arg, long_name, &rest))
+ if (((flags ^ opt_flags) & OPT_UNSET) && !allow_unset)
+ continue;
+
+ if (!skip_prefix(arg_start, long_name, &rest))
rest = NULL;
if (!rest) {
/* abbreviated? */
- if (!strncmp(long_name, arg, arg_end - arg)) {
+ if (!strncmp(long_name, arg_start, arg_end - arg_start)) {
register_abbrev(p, options, flags ^ opt_flags,
&abbrev, &ambiguous);
}
@@ -412,24 +426,10 @@ static enum parse_opt_result parse_long_opt(
continue;
/* negated and abbreviated very much? */
if (starts_with("no-", arg)) {
- flags |= OPT_UNSET;
- register_abbrev(p, options, flags ^ opt_flags,
+ register_abbrev(p, options, OPT_UNSET ^ opt_flags,
&abbrev, &ambiguous);
- continue;
}
- /* negated? */
- if (!starts_with(arg, "no-"))
- continue;
- flags |= OPT_UNSET;
- if (!skip_prefix(arg + 3, long_name, &rest)) {
- /* abbreviated and negated? */
- if (!strncmp(long_name, arg + 3,
- arg_end - arg - 3))
- register_abbrev(p, options,
- flags ^ opt_flags,
- &abbrev, &ambiguous);
- continue;
- }
+ continue;
}
if (*rest) {
if (*rest != '=')
