git-svn: make Git::SVN::Fetcher a separate file

diff --git a/xdiff/xutils.c b/xdiff/xutils.c
index 1b3b471ac86a30474e3acabea3d2df3b6da072d8..9504eaecb8ac45248ea22b0779aa7492cd15d83e 100644 (file)
--- a/xdiff/xutils.c
+++ b/xdiff/xutils.c
@@ -122,35 +122,6 @@ void *xdl_cha_alloc(chastore_t *cha) {
        return data;
 }
 
-
-void *xdl_cha_first(chastore_t *cha) {
-       chanode_t *sncur;
-
-       if (!(cha->sncur = sncur = cha->head))
-               return NULL;
-
-       cha->scurr = 0;
-
-       return (char *) sncur + sizeof(chanode_t) + cha->scurr;
-}
-
-
-void *xdl_cha_next(chastore_t *cha) {
-       chanode_t *sncur;
-
-       if (!(sncur = cha->sncur))
-               return NULL;
-       cha->scurr += cha->isize;
-       if (cha->scurr == sncur->icurr) {
-               if (!(sncur = cha->sncur = sncur->next))
-                       return NULL;
-               cha->scurr = 0;
-       }
-
-       return (char *) sncur + sizeof(chanode_t) + cha->scurr;
-}
-
-
 long xdl_guess_lines(mmfile_t *mf, long sample) {
        long nl = 0, size, tsize = 0;
        char const *data, *cur, *top;
@@ -280,9 +251,11 @@ static unsigned long xdl_hash_record_with_whitespace(char const **data,
 
 #ifdef XDL_FAST_HASH
 
-#define ONEBYTES       0x0101010101010101ul
-#define NEWLINEBYTES   0x0a0a0a0a0a0a0a0aul
-#define HIGHBITS       0x8080808080808080ul
+#define REPEAT_BYTE(x)  ((~0ul / 0xff) * (x))
+
+#define ONEBYTES       REPEAT_BYTE(0x01)
+#define NEWLINEBYTES   REPEAT_BYTE(0x0a)
+#define HIGHBITS       REPEAT_BYTE(0x80)
 
 /* Return the high bit set in the first byte that is a zero */
 static inline unsigned long has_zero(unsigned long a)
@@ -299,21 +272,19 @@ static inline long count_masked_bytes(unsigned long mask)
                 * that works for the bytemasks without having to
                 * mask them first.
                 */
-               return mask * 0x0001020304050608 >> 56;
-       } else {
                /*
-                * Modified Carl Chatfield G+ version for 32-bit *
+                * return mask * 0x0001020304050608 >> 56;
                 *
-                * (a) gives us
-                *   -1 (0, ff), 0 (ffff) or 1 (ffffff)
-                * (b) gives us
-                *   0 for 0, 1 for (ff ffff ffffff)
-                * (a+b+1) gives us
-                *   correct 0-3 bytemask count result
+                * Doing it like this avoids warnings on 32-bit machines.
                 */
-               long a = (mask - 256) >> 23;
-               long b = mask & 1;
-               return a + b + 1;
+               long a = (REPEAT_BYTE(0x01) / 0xff + 1);
+               return mask * a >> (sizeof(long) * 7);
+       } else {
+               /* Carl Chatfield / Jan Achrenius G+ version for 32-bit */
+               /* (000000 0000ff 00ffff ffffff) -> ( 1 1 2 3 ) */
+               long a = (0x0ff0001 + mask) >> 23;
+               /* Fix the 1 for 00 case */
+               return a & mask;
        }
 }
 
@@ -430,20 +401,6 @@ int xdl_num_out(char *out, long val) {
        return str - out;
 }
 
-
-long xdl_atol(char const *str, char const **next) {
-       long val, base;
-       char const *top;
-
-       for (top = str; XDL_ISDIGIT(*top); top++);
-       if (next)
-               *next = top;
-       for (val = 0, base = 1, top--; top >= str; top--, base *= 10)
-               val += base * (long)(*top - '0');
-       return val;
-}
-
-
 int xdl_emit_hunk_hdr(long s1, long c1, long s2, long c2,
                      const char *func, long funclen, xdemitcb_t *ecb) {
        int nb = 0;