prefix_filename: simplify windows #ifdef

The prefix_filename function used to do an early return when
there was no prefix on non-Windows platforms, but always
allocated on Windows so that it could call convert_slashes().

Now that the function always allocates, we can unify the
logic and make convert_slashes() the only conditional part.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/abspath.c b/abspath.c
index 4addd1fde0a3df34b33599ac2f1ed72a90bd23ed..7f1cfe97929ea33efb81adfcc97b82f334dccb3d 100644 (file)
--- a/abspath.c
+++ b/abspath.c
@@ -251,18 +251,15 @@ char *prefix_filename(const char *pfx, const char *arg)
        struct strbuf path = STRBUF_INIT;
        size_t pfx_len = pfx ? strlen(pfx) : 0;
 
-#ifndef GIT_WINDOWS_NATIVE
-       if (!pfx_len || is_absolute_path(arg))
-               return xstrdup(arg);
-       strbuf_add(&path, pfx, pfx_len);
-       strbuf_addstr(&path, arg);
-#else
-       /* don't add prefix to absolute paths, but still replace '\' by '/' */
-       if (is_absolute_path(arg))
+       if (!pfx_len)
+               ; /* nothing to prefix */
+       else if (is_absolute_path(arg))
                pfx_len = 0;
-       else if (pfx_len)
+       else
                strbuf_add(&path, pfx, pfx_len);
+
        strbuf_addstr(&path, arg);
+#ifdef GIT_WINDOWS_NATIVE
        convert_slashes(path.buf + pfx_len);
 #endif
        return strbuf_detach(&path, NULL);