To replace "%.*s" with "%s", all we have to do is use snprintf()
to interpolate "%s" into the pattern.
Signed-off-by: Michael Haggerty <mhag...@alum.mit.edu>
---
refs.c | 35 +++++++++--------------------------
1 file changed, 9 insertions(+), 26 deletions(-)
diff --git a/refs.c b/refs.c
index 9530480..ef9cdea 100644
--- a/refs.c
+++ b/refs.c
@@ -3334,29 +3334,6 @@ cleanup:
return ret;
}
-/*
- * generate a format suitable for scanf from a ref_rev_parse_rules
- * rule, that is replace the "%.*s" spec with a "%s" spec
- */
-static void gen_scanf_fmt(char *scanf_fmt, const char *rule)
-{
- char *spec;
-
- spec = strstr(rule, "%.*s");
- if (!spec || strstr(spec + 4, "%.*s"))
- die("invalid rule in ref_rev_parse_rules: %s", rule);
-
- /* copy all until spec */
- strncpy(scanf_fmt, rule, spec - rule);
- scanf_fmt[spec - rule] = '\0';
- /* copy new spec */
- strcat(scanf_fmt, "%s");
- /* copy remaining rule */
- strcat(scanf_fmt, spec + 4);
-
- return;
-}
-
char *shorten_unambiguous_ref(const char *refname, int strict)
{
int i;
@@ -3364,8 +3341,13 @@ char *shorten_unambiguous_ref(const char *refname, int
strict)
static int nr_rules;
char *short_name;
- /* pre generate scanf formats from ref_rev_parse_rules[] */
if (!nr_rules) {
+ /*
+ * Pre-generate scanf formats from ref_rev_parse_rules[].
+ * Generate a format suitable for scanf from a
+ * ref_rev_parse_rules rule by interpolating "%s" at the
+ * location of the "%.*s".
+ */
size_t total_len = 0;
size_t offset = 0;
@@ -3378,9 +3360,10 @@ char *shorten_unambiguous_ref(const char *refname, int
strict)
offset = 0;
for (i = 0; i < nr_rules; i++) {
+ assert(offset < total_len);
scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset;
- gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]);
- offset += strlen(ref_rev_parse_rules[i]);
+ offset += snprintf(scanf_fmts[i], total_len - offset,
+ ref_rev_parse_rules[i], 2, "%s") + 1;
}
}
--
1.8.5.2
--
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