-/*
- * Give path as relative to prefix.
- *
- * The strbuf may or may not be used, so do not assume it contains the
- * returned path.
- */
-static const char *path_relative(const char *in, int len,
- struct strbuf *sb, const char *prefix,
- int prefix_len)
-{
- int off, i;
-
- if (len < 0)
- len = strlen(in);
- if (prefix_len < 0) {
- if (prefix)
- prefix_len = strlen(prefix);
- else
- prefix_len = 0;
- }
-
- off = 0;
- i = 0;
- while (i < prefix_len && i < len && prefix[i] == in[i]) {
- if (prefix[i] == '/')
- off = i + 1;
- i++;
- }
- in += off;
- len -= off;
-
- if (i >= prefix_len)
- return in;
-
- strbuf_reset(sb);
- strbuf_grow(sb, len);
-
- while (i < prefix_len) {
- if (prefix[i] == '/')
- strbuf_addstr(sb, "../");
- i++;
- }
- strbuf_add(sb, in, len);
-
- return sb->buf;
-}
-