xdiff: drop XDL_EMIT_COMMON

There are no more callers that use this mode, and none
likely to be added (as our xdl_merge() eliminates the common
use of it for generating 3-way merge bases).

This is effectively a revert of a9ed376 (xdiff: generate
"anti-diffs" aka what is common to two files, 2006-06-28),
though of course trying to revert that ancient commit
directly produces many textual conflicts.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h
index c033991..4fb7e79 100644 (file)
--- a/xdiff/xdiff.h
+++ b/xdiff/xdiff.h
@@ -42,7 +42,6 @@ extern "C" {
 #define XDF_IGNORE_BLANK_LINES (1 << 7)
 
 #define XDL_EMIT_FUNCNAMES (1 << 0)
-#define XDL_EMIT_COMMON (1 << 1)
 #define XDL_EMIT_FUNCCONTEXT (1 << 2)
 
 #define XDL_MMB_READONLY (1 << 0)

diff --git a/xdiff/xemit.c b/xdiff/xemit.c
index 4266ada..993724b 100644 (file)
--- a/xdiff/xemit.c
+++ b/xdiff/xemit.c
@@ -120,21 +120,6 @@ static long def_ff(const char *rec, long len, char *buf, long sz, void *priv)
        return -1;
 }
 
-static int xdl_emit_common(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
-                           xdemitconf_t const *xecfg) {
-       xdfile_t *xdf = &xe->xdf2;
-       const char *rchg = xdf->rchg;
-       long ix;
-
-       for (ix = 0; ix < xdf->nrec; ix++) {
-               if (rchg[ix])
-                       continue;
-               if (xdl_emit_record(xdf, ix, "", ecb))
-                       return -1;
-       }
-       return 0;
-}
-
 struct func_line {
        long len;
        char buf[80];
@@ -170,9 +155,6 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
        long funclineprev = -1;
        struct func_line func_line = { 0 };
 
-       if (xecfg->flags & XDL_EMIT_COMMON)
-               return xdl_emit_common(xe, xscr, ecb, xecfg);
-
        for (xch = xscr; xch; xch = xche->next) {
                xche = xdl_get_hunk(&xch, xecfg);
                if (!xch)