Make git-prune submodule aware (and fix a SEGFAULT in the process)

diff --git a/xdiff/xutils.c b/xdiff/xutils.c
index 3653864e4bf704c024453df8d9abf26d89b4778d..bf91c0f73c658637d078ac93226148faa3bb0dc4 100644 (file)
--- a/xdiff/xutils.c
+++ b/xdiff/xutils.c
@@ -236,12 +236,13 @@ int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags)
        return 0;
 }
 
-unsigned long xdl_hash_record(char const **data, char const *top, long flags) {
+static unsigned long xdl_hash_record_with_whitespace(char const **data,
+               char const *top, long flags) {
        unsigned long ha = 5381;
        char const *ptr = *data;
 
        for (; ptr < top && *ptr != '\n'; ptr++) {
-               if (isspace(*ptr) && (flags & XDF_WHITESPACE_FLAGS)) {
+               if (isspace(*ptr)) {
                        const char *ptr2 = ptr;
                        while (ptr + 1 < top && isspace(ptr[1])
                                        && ptr[1] != '\n')
@@ -270,6 +271,23 @@ unsigned long xdl_hash_record(char const **data, char const *top, long flags) {
 }
 
 
+unsigned long xdl_hash_record(char const **data, char const *top, long flags) {
+       unsigned long ha = 5381;
+       char const *ptr = *data;
+
+       if (flags & XDF_WHITESPACE_FLAGS)
+               return xdl_hash_record_with_whitespace(data, top, flags);
+
+       for (; ptr < top && *ptr != '\n'; ptr++) {
+               ha += (ha << 5);
+               ha ^= (unsigned long) *ptr;
+       }
+       *data = ptr < top ? ptr + 1: ptr;
+
+       return ha;
+}
+
+
 unsigned int xdl_hashbits(unsigned int size) {
        unsigned int val = 1, bits = 0;