diff options
| -rw-r--r-- | builtin-for-each-ref.c | 105 | ||||
| -rw-r--r-- | refs.c | 99 | ||||
| -rw-r--r-- | refs.h | 1 |
3 files changed, 101 insertions, 104 deletions
diff --git a/builtin-for-each-ref.c b/builtin-for-each-ref.c index 8796352eb6..c8114c8afd 100644 --- a/builtin-for-each-ref.c +++ b/builtin-for-each-ref.c @@ -546,109 +546,6 @@ static void grab_values(struct atom_value *val, int deref, struct object *obj, v } /* - * 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; -} - -/* - * Shorten the refname to an non-ambiguous form - */ -static char *get_short_ref(const char *ref) -{ - int i; - static char **scanf_fmts; - static int nr_rules; - char *short_name; - - /* pre generate scanf formats from ref_rev_parse_rules[] */ - if (!nr_rules) { - size_t total_len = 0; - - /* the rule list is NULL terminated, count them first */ - for (; ref_rev_parse_rules[nr_rules]; nr_rules++) - /* no +1 because strlen("%s") < strlen("%.*s") */ - total_len += strlen(ref_rev_parse_rules[nr_rules]); - - scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len); - - total_len = 0; - for (i = 0; i < nr_rules; i++) { - scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] - + total_len; - gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]); - total_len += strlen(ref_rev_parse_rules[i]); - } - } - - /* bail out if there are no rules */ - if (!nr_rules) - return xstrdup(ref); - - /* buffer for scanf result, at most ref must fit */ - short_name = xstrdup(ref); - - /* skip first rule, it will always match */ - for (i = nr_rules - 1; i > 0 ; --i) { - int j; - int short_name_len; - - if (1 != sscanf(ref, scanf_fmts[i], short_name)) - continue; - - short_name_len = strlen(short_name); - - /* - * check if the short name resolves to a valid ref, - * but use only rules prior to the matched one - */ - for (j = 0; j < i; j++) { - const char *rule = ref_rev_parse_rules[j]; - unsigned char short_objectname[20]; - char refname[PATH_MAX]; - - /* - * the short name is ambiguous, if it resolves - * (with this previous rule) to a valid ref - * read_ref() returns 0 on success - */ - mksnpath(refname, sizeof(refname), - rule, short_name_len, short_name); - if (!read_ref(refname, short_objectname)) - break; - } - - /* - * short name is non-ambiguous if all previous rules - * haven't resolved to a valid ref - */ - if (j == i) - return short_name; - } - - free(short_name); - return xstrdup(ref); -} - - -/* * Parse the object referred by ref, and grab needed value. */ static void populate_value(struct refinfo *ref) @@ -704,7 +601,7 @@ static void populate_value(struct refinfo *ref) if (formatp) { formatp++; if (!strcmp(formatp, "short")) - refname = get_short_ref(refname); + refname = shorten_unambiguous_ref(refname); else die("unknown %.*s format %s", (int)(formatp - name), name, formatp); @@ -1652,3 +1652,102 @@ struct ref *find_ref_by_name(const struct ref *list, const char *name) return (struct ref *)list; return NULL; } + +/* + * 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 *ref) +{ + int i; + static char **scanf_fmts; + static int nr_rules; + char *short_name; + + /* pre generate scanf formats from ref_rev_parse_rules[] */ + if (!nr_rules) { + size_t total_len = 0; + + /* the rule list is NULL terminated, count them first */ + for (; ref_rev_parse_rules[nr_rules]; nr_rules++) + /* no +1 because strlen("%s") < strlen("%.*s") */ + total_len += strlen(ref_rev_parse_rules[nr_rules]); + + scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len); + + total_len = 0; + for (i = 0; i < nr_rules; i++) { + scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + + total_len; + gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]); + total_len += strlen(ref_rev_parse_rules[i]); + } + } + + /* bail out if there are no rules */ + if (!nr_rules) + return xstrdup(ref); + + /* buffer for scanf result, at most ref must fit */ + short_name = xstrdup(ref); + + /* skip first rule, it will always match */ + for (i = nr_rules - 1; i > 0 ; --i) { + int j; + int short_name_len; + + if (1 != sscanf(ref, scanf_fmts[i], short_name)) + continue; + + short_name_len = strlen(short_name); + + /* + * check if the short name resolves to a valid ref, + * but use only rules prior to the matched one + */ + for (j = 0; j < i; j++) { + const char *rule = ref_rev_parse_rules[j]; + unsigned char short_objectname[20]; + char refname[PATH_MAX]; + + /* + * the short name is ambiguous, if it resolves + * (with this previous rule) to a valid ref + * read_ref() returns 0 on success + */ + mksnpath(refname, sizeof(refname), + rule, short_name_len, short_name); + if (!read_ref(refname, short_objectname)) + break; + } + + /* + * short name is non-ambiguous if all previous rules + * haven't resolved to a valid ref + */ + if (j == i) + return short_name; + } + + free(short_name); + return xstrdup(ref); +} @@ -80,6 +80,7 @@ extern int for_each_reflog(each_ref_fn, void *); extern int check_ref_format(const char *target); extern const char *prettify_ref(const struct ref *ref); +extern char *shorten_unambiguous_ref(const char *ref); /** rename ref, return 0 on success **/ extern int rename_ref(const char *oldref, const char *newref, const char *logmsg); |