diff: add --ignore-blank-lines option

[thirdparty/git.git] / xdiff / xdiffi.c

diff --git a/xdiff/xdiffi.c b/xdiff/xdiffi.c
index b2eb6db2c851aea7eb08b17d802155876bef211c..2358a2d6326e54308413cb8a5e6b61eba06324e9 100644 (file)
--- a/xdiff/xdiffi.c
+++ b/xdiff/xdiffi.c
@@ -394,6 +394,7 @@ static xdchange_t *xdl_add_change(xdchange_t *xscr, long i1, long i2, long chg1,
        xch->i2 = i2;
        xch->chg1 = chg1;
        xch->chg2 = chg2;
+       xch->ignore = 0;
 
        return xch;
 }
@@ -544,7 +545,9 @@ static int xdl_call_hunk_func(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
        xdchange_t *xch, *xche;
 
        for (xch = xscr; xch; xch = xche->next) {
-               xche = xdl_get_hunk(xch, xecfg);
+               xche = xdl_get_hunk(&xch, xecfg);
+               if (!xch)
+                       break;
                if (xecfg->hunk_func(xch->i1, xche->i1 + xche->chg1 - xch->i1,
                                     xch->i2, xche->i2 + xche->chg2 - xch->i2,
                                     ecb->priv) < 0)
@@ -553,6 +556,27 @@ static int xdl_call_hunk_func(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
        return 0;
 }
 
+static void xdl_mark_ignorable(xdchange_t *xscr, xdfenv_t *xe, long flags)
+{
+       xdchange_t *xch;
+
+       for (xch = xscr; xch; xch = xch->next) {
+               int ignore = 1;
+               xrecord_t **rec;
+               long i;
+
+               rec = &xe->xdf1.recs[xch->i1];
+               for (i = 0; i < xch->chg1 && ignore; i++)
+                       ignore = xdl_blankline(rec[i]->ptr, rec[i]->size, flags);
+
+               rec = &xe->xdf2.recs[xch->i2];
+               for (i = 0; i < xch->chg2 && ignore; i++)
+                       ignore = xdl_blankline(rec[i]->ptr, rec[i]->size, flags);
+
+               xch->ignore = ignore;
+       }
+}
+
 int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
             xdemitconf_t const *xecfg, xdemitcb_t *ecb) {
        xdchange_t *xscr;
@@ -571,6 +595,9 @@ int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
                return -1;
        }
        if (xscr) {
+               if (xpp->flags & XDF_IGNORE_BLANK_LINES)
+                       xdl_mark_ignorable(xscr, &xe, xpp->flags);
+
                if (ef(&xe, xscr, ecb, xecfg) < 0) {
 
                        xdl_free_script(xscr);