Function remove_signature

commit.c:1249–1296

}

int remove_signature(struct strbuf *buf)
{
	const char *line = buf->buf;
	const char *tail = buf->buf + buf->len;
	int in_signature = 0;
	struct sigbuf {
		const char *start;
		const char *end;
	} sigs[2], *sigp = &sigs[0];
	int i;
	const char *orig_buf = buf->buf;

	memset(sigs, 0, sizeof(sigs));

	while (line < tail) {
		const char *next = memchr(line, '\n', tail - line);
		next = next ? next + 1 : tail;

		if (in_signature && line[0] == ' ')
			sigp->end = next;
		else if (starts_with(line, "gpgsig")) {
			int i;
			for (i = 1; i < GIT_HASH_NALGOS; i++) {
				const char *p;
				if (skip_prefix(line, gpg_sig_headers[i], &p) &&
				    *p == ' ') {
					sigp->start = line;
					sigp->end = next;
					in_signature = 1;
				}
			}
		} else {
			if (*line == '\n')
				/* dump the whole remainder of the buffer */
				next = tail;
			if (in_signature && sigp - sigs != ARRAY_SIZE(sigs))
				sigp++;
			in_signature = 0;
		}
		line = next;
	}

	for (i = ARRAY_SIZE(sigs) - 1; i >= 0; i--)
		if (sigs[i].start)
			strbuf_remove(buf, sigs[i].start - orig_buf, sigs[i].end - sigs[i].start);

	return sigs[0].start != NULL;
}

static void handle_signed_tag(const struct commit *parent, struct commit_extra_header ***tail)
{