Function label_oid

sequencer.c:5763–5897

};

static const char *label_oid(struct object_id *oid, const char *label,
			     struct label_state *state)
{
	struct labels_entry *labels_entry;
	struct string_entry *string_entry;
	struct object_id dummy;
	int i;

	string_entry = oidmap_get(&state->commit2label, oid);
	if (string_entry)
		return string_entry->string;

	/*
	 * For "uninteresting" commits, i.e. commits that are not to be
	 * rebased, and which can therefore not be labeled, we use a unique
	 * abbreviation of the commit name. This is slightly more complicated
	 * than calling repo_find_unique_abbrev() because we also need to make
	 * sure that the abbreviation does not conflict with any other
	 * label.
	 *
	 * We disallow "interesting" commits to be labeled by a string that
	 * is a valid full-length hash, to ensure that we always can find an
	 * abbreviation for any uninteresting commit's names that does not
	 * clash with any other label.
	 */
	strbuf_reset(&state->buf);
	if (!label) {
		char *p;

		strbuf_grow(&state->buf, GIT_MAX_HEXSZ);
		label = p = state->buf.buf;

		repo_find_unique_abbrev_r(the_repository, p, oid,
					  default_abbrev);

		/*
		 * We may need to extend the abbreviated hash so that there is
		 * no conflicting label.
		 */
		if (hashmap_get_from_hash(&state->labels, strihash(p), p)) {
			size_t i = strlen(p) + 1;

			oid_to_hex_r(p, oid);
			for (; i < the_hash_algo->hexsz; i++) {
				char save = p[i];
				p[i] = '\0';
				if (!hashmap_get_from_hash(&state->labels,
							   strihash(p), p))
					break;
				p[i] = save;
			}
		}
	} else {
		struct strbuf *buf = &state->buf;
		int label_is_utf8 = 1; /* start with this assumption */
		size_t max_len = buf->len + state->max_label_length;

		/*