parse-opt: add PARSE_OPT_KEEP_ARGV0 parser option.

diff --git a/quote.c b/quote.c
index d061626c34f1e62c538db6e931c29751be4fdbcf..d5cf9d8f94f37fe8ff9f964998c7f0525617e5bc 100644 (file)
--- a/quote.c
+++ b/quote.c
@@ -260,6 +260,48 @@ extern void write_name_quotedpfx(const char *pfx, size_t pfxlen,
        fputc(terminator, fp);
 }
 
+/* quote path as relative to the given prefix */
+char *quote_path_relative(const char *in, int len,
+                         struct strbuf *out, const char *prefix)
+{
+       int needquote;
+
+       if (len < 0)
+               len = strlen(in);
+
+       /* "../" prefix itself does not need quoting, but "in" might. */
+       needquote = next_quote_pos(in, len) < len;
+       strbuf_setlen(out, 0);
+       strbuf_grow(out, len);
+
+       if (needquote)
+               strbuf_addch(out, '"');
+       if (prefix) {
+               int off = 0;
+               while (prefix[off] && off < len && prefix[off] == in[off])
+                       if (prefix[off] == '/') {
+                               prefix += off + 1;
+                               in += off + 1;
+                               len -= off + 1;
+                               off = 0;
+                       } else
+                               off++;
+
+               for (; *prefix; prefix++)
+                       if (*prefix == '/')
+                               strbuf_addstr(out, "../");
+       }
+
+       quote_c_style_counted (in, len, out, NULL, 1);
+
+       if (needquote)
+               strbuf_addch(out, '"');
+       if (!out->len)
+               strbuf_addstr(out, "./");
+
+       return out->buf;
+}
+
 /*
  * C-style name unquoting.
  *
@@ -288,7 +330,7 @@ int unquote_c_style(struct strbuf *sb, const char *quoted, const char **endp)
                switch (*quoted++) {
                  case '"':
                        if (endp)
-                               *endp = quoted + 1;
+                               *endp = quoted;
                        return 0;
                  case '\\':
                        break;