Fix rewrite_diff() name quoting.

This moves the logic to quote two paths (prefix + path) in
C-style introduced in the previous commit from the
dump_quoted_path() in combine-diff.c to quote.c, and uses it to
fix rewrite_diff() that never C-quoted the pathnames correctly.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/quote.c b/quote.c
index 6986b44..d061626 100644
--- a/quote.c
+++ b/quote.c
@@ -213,6 +213,22 @@ size_t quote_c_style(const char *name, struct strbuf *sb, FILE *fp, int nodq)
 	return quote_c_style_counted(name, -1, sb, fp, nodq);
 }
 
+void quote_two_c_style(struct strbuf *sb, const char *prefix, const char *path, int nodq)
+{
+	if (quote_c_style(prefix, NULL, NULL, 0) ||
+	    quote_c_style(path, NULL, NULL, 0)) {
+		if (!nodq)
+			strbuf_addch(sb, '"');
+		quote_c_style(prefix, sb, NULL, 1);
+		quote_c_style(path, sb, NULL, 1);
+		if (!nodq)
+			strbuf_addch(sb, '"');
+	} else {
+		strbuf_addstr(sb, prefix);
+		strbuf_addstr(sb, path);
+	}
+}
+
 void write_name_quoted(const char *name, FILE *fp, int terminator)
 {
 	if (terminator) {