Make on-disk index representation separate from in-core one

diff --git a/xdiff-interface.c b/xdiff-interface.c
index 9ee877c6f4d281ad86c8760aa9ee7b4289f647ac..4b8e5cca804198b0e227454a585fa025281bbe2d 100644 (file)
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -115,17 +115,20 @@ static void trim_common_tail(mmfile_t *a, mmfile_t *b, long ctx)
        char *bp = b->ptr + b->size;
        long smaller = (a->size < b->size) ? a->size : b->size;
 
+       if (ctx)
+               return;
+
        while (blk + trimmed <= smaller && !memcmp(ap - blk, bp - blk, blk)) {
                trimmed += blk;
                ap -= blk;
                bp -= blk;
        }
 
-       while (recovered < trimmed && 0 <= ctx)
+       while (recovered < trimmed)
                if (ap[recovered++] == '\n')
-                       ctx--;
-       a->size -= (trimmed - recovered);
-       b->size -= (trimmed - recovered);
+                       break;
+       a->size -= trimmed - recovered;
+       b->size -= trimmed - recovered;
 }
 
 int xdi_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t const *xecfg, xdemitcb_t *xecb)