Function strbuf_stripspace

strbuf.c:1095–1128

* Remove empty lines from the beginning and end * and also trailing spaces from every line. * * Turn multiple consecutive empty lines between paragraphs * into just one empty line. * * If the input has only empty lines and spaces, * no output will be produced. * * If last line does not have a newline at the end, one is added. * * Pass a non-NULL comment_prefix to skip every line startin

 * with it.
 */
void strbuf_stripspace(struct strbuf *sb, const char *comment_prefix)
{
	size_t empties = 0;
	size_t i, j, len, newlen;
	char *eol;

	/* We may have to add a newline. */
	strbuf_grow(sb, 1);

	for (i = j = 0; i < sb->len; i += len, j += newlen) {
		eol = memchr(sb->buf + i, '\n', sb->len - i);
		len = eol ? eol - (sb->buf + i) + 1 : sb->len - i;

		if (comment_prefix && len &&
		    starts_with(sb->buf + i, comment_prefix)) {
			newlen = 0;
			continue;
		}
		newlen = cleanup(sb->buf + i, len);

		/* Not just an empty line? */
		if (newlen) {
			if (empties > 0 && j > 0)
				sb->buf[j++] = '\n';
			empties = 0;
			memmove(sb->buf + j, sb->buf + i, newlen);
			sb->buf[newlen + j++] = '\n';
		} else {
			empties++;
		}
	}

	strbuf_setlen(sb, j);
}

void strbuf_strip_file_from_path(struct strbuf *sb)
{