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parse-options: factor out parse_options_count() 

Add a helper function to count the number of options (excluding the
final OPT_END()) and use it to simplify parse_options_dup() and
parse_options_concat().

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2020-02-09 16:56:47 +01:00 committed by Junio C Hamano
parent a277d0a67f
commit f904f9025f
1 changed files with 12 additions and 12 deletions
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24
parse-options-cb.c
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@ -159,16 +159,20 @@ int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
return 0;
}
static size_t parse_options_count(const struct option *opt)
{
size_t n = 0;
for (; opt && opt->type != OPTION_END; opt++)
n++;
return n;
}
struct option *parse_options_dup(const struct option *o)
{
const struct option *orig = o;
struct option *opts;
int nr = 0;
while (o && o->type != OPTION_END) {
nr++;
o++;
}
size_t nr = parse_options_count(o);
ALLOC_ARRAY(opts, nr + 1);
COPY_ARRAY(opts, orig, nr);
@ -180,12 +184,8 @@ struct option *parse_options_dup(const struct option *o)
struct option *parse_options_concat(struct option *a, struct option *b)
{
struct option *ret;
size_t i, a_len = 0, b_len = 0;
for (i = 0; a[i].type != OPTION_END; i++)
a_len++;
for (i = 0; b[i].type != OPTION_END; i++)
b_len++;
size_t a_len = parse_options_count(a);
size_t b_len = parse_options_count(b);
ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
COPY_ARRAY(ret, a, a_len);