Merge branch 'maint-1.7.6' into maint-1.7.7

[git.git] / xdiff / xprepare.c

diff --git a/xdiff/xprepare.c b/xdiff/xprepare.c
index eba31ffaeebb4fe15f45ce854aa2ed3f63489b8c..e419f4f726019a5b0365c589285439fb3bfb8db2 100644 (file)
--- a/xdiff/xprepare.c
+++ b/xdiff/xprepare.c
@@ -264,6 +264,8 @@ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
        long enl1, enl2, sample;
        xdlclassifier_t cf;
 
+       memset(&cf, 0, sizeof(cf));
+
        /*
         * For histogram diff, we can afford a smaller sample size and
         * thus a poorer estimate of the number of lines, as the hash
@@ -381,7 +383,7 @@ static int xdl_clean_mmatch(char const *dis, long i, long s, long e) {
  * might be potentially discarded if they happear in a run of discardable.
  */
 static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2) {
-       long i, nm, nreff;
+       long i, nm, nreff, mlim;
        xrecord_t **recs;
        xdlclass_t *rcrec;
        char *dis, *dis1, *dis2;
@@ -394,16 +396,20 @@ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xd
        dis1 = dis;
        dis2 = dis1 + xdf1->nrec + 1;
 
+       if ((mlim = xdl_bogosqrt(xdf1->nrec)) > XDL_MAX_EQLIMIT)
+               mlim = XDL_MAX_EQLIMIT;
        for (i = xdf1->dstart, recs = &xdf1->recs[xdf1->dstart]; i <= xdf1->dend; i++, recs++) {
                rcrec = cf->rcrecs[(*recs)->ha];
                nm = rcrec ? rcrec->len2 : 0;
-               dis1[i] = (nm == 0) ? 0: 1;
+               dis1[i] = (nm == 0) ? 0: (nm >= mlim) ? 2: 1;
        }
 
+       if ((mlim = xdl_bogosqrt(xdf2->nrec)) > XDL_MAX_EQLIMIT)
+               mlim = XDL_MAX_EQLIMIT;
        for (i = xdf2->dstart, recs = &xdf2->recs[xdf2->dstart]; i <= xdf2->dend; i++, recs++) {
                rcrec = cf->rcrecs[(*recs)->ha];
                nm = rcrec ? rcrec->len1 : 0;
-               dis2[i] = (nm == 0) ? 0: 1;
+               dis2[i] = (nm == 0) ? 0: (nm >= mlim) ? 2: 1;
        }
 
        for (nreff = 0, i = xdf1->dstart, recs = &xdf1->recs[xdf1->dstart];