link_alt_odb_entries(): use string_list_split_in_place()

Change link_alt_odb_entry() to take a NUL-terminated string instead of
(char *, len).  Use string_list_split_in_place() rather than inline
code in link_alt_odb_entries().

This approach saves some code and also avoids the (probably harmless)
error of passing a non-NUL-terminated string to is_absolute_path().

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Jeff King <peff@peff.net>

diff --git a/sha1_file.c b/sha1_file.c
index 9152974642986de2307ec4ed6beda4efa49e8383..c3524131c180e0ca2e01d1959286cdfdb43811f9 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -7,6 +7,7 @@
  * creation etc.
  */
 #include "cache.h"
+#include "string-list.h"
 #include "delta.h"
 #include "pack.h"
 #include "blob.h"
@@ -246,7 +247,7 @@ static int git_open_noatime(const char *name);
  * SHA1, an extra slash for the first level indirection, and the
  * terminating NUL.
  */
-static int link_alt_odb_entry(const char * entry, int len, const char * relative_base, int depth)
+static int link_alt_odb_entry(const char *entry, const char *relative_base, int depth)
 {
        const char *objdir = get_object_directory();
        struct alternate_object_database *ent;
@@ -258,7 +259,7 @@ static int link_alt_odb_entry(const char * entry, int len, const char * relative
                strbuf_addstr(&pathbuf, real_path(relative_base));
                strbuf_addch(&pathbuf, '/');
        }
-       strbuf_add(&pathbuf, entry, len);
+       strbuf_addstr(&pathbuf, entry);
 
        normalize_path_copy(pathbuf.buf, pathbuf.buf);
 
@@ -319,7 +320,9 @@ static int link_alt_odb_entry(const char * entry, int len, const char * relative
 static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
                                 const char *relative_base, int depth)
 {
-       const char *cp, *last;
+       struct string_list entries = STRING_LIST_INIT_NODUP;
+       char *alt_copy;
+       int i;
 
        if (depth > 5) {
                error("%s: ignoring alternate object stores, nesting too deep.",
@@ -327,30 +330,21 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
                return;
        }
 
-       last = alt;
-       while (last < ep) {
-               cp = last;
-               if (cp < ep && *cp == '#') {
-                       while (cp < ep && *cp != sep)
-                               cp++;
-                       last = cp + 1;
+       alt_copy = xmemdupz(alt, ep - alt);
+       string_list_split_in_place(&entries, alt_copy, sep, -1);
+       for (i = 0; i < entries.nr; i++) {
+               const char *entry = entries.items[i].string;
+               if (entry[0] == '\0' || entry[0] == '#')
                        continue;
+               if (!is_absolute_path(entry) && depth) {
+                       error("%s: ignoring relative alternate object store %s",
+                                       relative_base, entry);
+               } else {
+                       link_alt_odb_entry(entry, relative_base, depth);
                }
-               while (cp < ep && *cp != sep)
-                       cp++;
-               if (last != cp) {
-                       if (!is_absolute_path(last) && depth) {
-                               error("%s: ignoring relative alternate object store %s",
-                                               relative_base, last);
-                       } else {
-                               link_alt_odb_entry(last, cp - last,
-                                               relative_base, depth);
-                       }
-               }
-               while (cp < ep && *cp == sep)
-                       cp++;
-               last = cp;
        }
+       string_list_clear(&entries, 0);
+       free(alt_copy);
 }
 
 void read_info_alternates(const char * relative_base, int depth)