safe_create_leading_directories(): add explicit "slash" pointer

Keep track of the position of the slash character independently of
"pos", thereby making the purpose of each variable clearer and
working towards other upcoming changes.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/sha1_file.c b/sha1_file.c
index e52a0032e556fe0907de1a6f9e10b09c6bfc6dc9..a2b9e3c50293ea5edd2a425168ed506bdc78b22f 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -111,19 +111,21 @@ int safe_create_leading_directories(char *path)
 
        while (pos) {
                struct stat st;
+               char *slash = strchr(pos, '/');
 
-               pos = strchr(pos, '/');
-               if (!pos)
+               if (!slash)
                        break;
-               while (*++pos == '/')
-                       ;
+               while (*(slash + 1) == '/')
+                       slash++;
+               pos = slash + 1;
                if (!*pos)
                        break;
-               *--pos = '\0';
+
+               *slash = '\0';
                if (!stat(path, &st)) {
                        /* path exists */
                        if (!S_ISDIR(st.st_mode)) {
-                               *pos = '/';
+                               *slash = '/';
                                return -3;
                        }
                } else if (mkdir(path, 0777)) {
@@ -131,14 +133,14 @@ int safe_create_leading_directories(char *path)
                            !stat(path, &st) && S_ISDIR(st.st_mode)) {
                                ; /* somebody created it since we checked */
                        } else {
-                               *pos = '/';
+                               *slash = '/';
                                return -1;
                        }
                } else if (adjust_shared_perm(path)) {
-                       *pos = '/';
+                       *slash = '/';
                        return -2;
                }
-               *pos++ = '/';
+               *slash = '/';
        }
        return 0;
 }