make union merge an xdl merge favor

The current union merge driver is implemented as an post process.  But the
xdl_merge code is quite capable to produce the result by itself.  Therefore
move it there.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/ll-merge.c b/ll-merge.c
index 4c7f11ba84c67089dce7d725d87a4dd32a245c7f..a4b2f4c964cd308bda05755cd83a047fd64e802e 100644 (file)
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -98,44 +98,11 @@ static int ll_union_merge(const struct ll_merge_driver *drv_unused,
                          mmfile_t *src2, const char *name2,
                          int flag, int marker_size)
 {
-       char *src, *dst;
-       long size;
-       int status, saved_style;
-
-       /* We have to force the RCS "merge" style */
-       saved_style = git_xmerge_style;
-       git_xmerge_style = 0;
-       status = ll_xdl_merge(drv_unused, result, path_unused,
-                             orig, src1, NULL, src2, NULL,
-                             flag, marker_size);
-       git_xmerge_style = saved_style;
-       if (status <= 0)
-               return status;
-       size = result->size;
-       src = dst = result->ptr;
-       while (size) {
-               char ch;
-               if ((marker_size < size) &&
-                   (*src == '<' || *src == '=' || *src == '>')) {
-                       int i;
-                       ch = *src;
-                       for (i = 0; i < marker_size; i++)
-                               if (src[i] != ch)
-                                       goto not_a_marker;
-                       if (src[marker_size] != '\n')
-                               goto not_a_marker;
-                       src += marker_size + 1;
-                       size -= marker_size + 1;
-                       continue;
-               }
-       not_a_marker:
-               do {
-                       ch = *src++;
-                       *dst++ = ch;
-                       size--;
-               } while (ch != '\n' && size);
-       }
-       result->size = dst - result->ptr;
+       /* Use union favor */
+       flag = (flag & 1) | (XDL_MERGE_FAVOR_UNION << 1);
+       return ll_xdl_merge(drv_unused, result, path_unused,
+                           orig, src1, NULL, src2, NULL,
+                           flag, marker_size);
        return 0;
 }
 

diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h
index 3f6229edbeb21bb1ca0c423d88390f3b5a05b5a2..22614d56ed0dac646027b8f51cfc70231c6c6532 100644 (file)
--- a/xdiff/xdiff.h
+++ b/xdiff/xdiff.h
@@ -61,6 +61,7 @@ extern "C" {
 /* merge favor modes */
 #define XDL_MERGE_FAVOR_OURS 1
 #define XDL_MERGE_FAVOR_THEIRS 2
+#define XDL_MERGE_FAVOR_UNION 3
 #define XDL_MERGE_FAVOR(flags) (((flags)>>4) & 3)
 #define XDL_MERGE_FLAGS(level, style, favor) ((level)|(style)|((favor)<<4))
 

diff --git a/xdiff/xmerge.c b/xdiff/xmerge.c
index 8cbe45e6755487dbe3759398375a11d05f6d91bc..c901ecb99c3369febcd7b8f66c3ededf31fc59ea 100644 (file)
--- a/xdiff/xmerge.c
+++ b/xdiff/xmerge.c
@@ -28,6 +28,7 @@ typedef struct s_xdmerge {
         * 0 = conflict,
         * 1 = no conflict, take first,
         * 2 = no conflict, take second.
+        * 3 = no conflict, take both.
         */
        int mode;
        /*
@@ -230,14 +231,19 @@ static int xdl_fill_merge_buffer(xdfenv_t *xe1, const char *name1,
                        size = fill_conflict_hunk(xe1, name1, xe2, name2,
                                                  size, i, style, m, dest,
                                                  marker_size);
-               else if (m->mode == 1)
-                       size += xdl_recs_copy(xe1, i, m->i1 + m->chg1 - i, 0,
+               else if (m->mode & 3) {
+                       /* Before conflicting part */
+                       size += xdl_recs_copy(xe1, i, m->i1 - i, 0,
                                              dest ? dest + size : NULL);
-               else if (m->mode == 2)
-                       size += xdl_recs_copy(xe2, m->i2 - m->i1 + i,
-                                             m->i1 + m->chg2 - i, 0,
-                                             dest ? dest + size : NULL);
-               else
+                       /* Postimage from side #1 */
+                       if (m->mode & 1)
+                               size += xdl_recs_copy(xe1, m->i1, m->chg1, 1,
+                                                     dest ? dest + size : NULL);
+                       /* Postimage from side #2 */
+                       if (m->mode & 2)
+                               size += xdl_recs_copy(xe2, m->i2, m->chg2, 1,
+                                                     dest ? dest + size : NULL);
+               } else
                        continue;
                i = m->i1 + m->chg1;
        }