t/t7800-difftool.sh: Skip with prereq on no PERL

[thirdparty/git.git] / ll-merge.c

diff --git a/ll-merge.c b/ll-merge.c
index 4c7f11ba84c67089dce7d725d87a4dd32a245c7f..3764a1ab72354a3ce643c899c1e8cf5443d4e7cb 100644 (file)
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -15,7 +15,7 @@ struct ll_merge_driver;
 typedef int (*ll_merge_fn)(const struct ll_merge_driver *,
                           mmbuffer_t *result,
                           const char *path,
-                          mmfile_t *orig,
+                          mmfile_t *orig, const char *orig_name,
                           mmfile_t *src1, const char *name1,
                           mmfile_t *src2, const char *name2,
                           int flag,
@@ -36,7 +36,7 @@ struct ll_merge_driver {
 static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
                           mmbuffer_t *result,
                           const char *path_unused,
-                          mmfile_t *orig,
+                          mmfile_t *orig, const char *orig_name,
                           mmfile_t *src1, const char *name1,
                           mmfile_t *src2, const char *name2,
                           int flag, int marker_size)
@@ -57,14 +57,12 @@ static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
 static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
                        mmbuffer_t *result,
                        const char *path,
-                       mmfile_t *orig,
+                       mmfile_t *orig, const char *orig_name,
                        mmfile_t *src1, const char *name1,
                        mmfile_t *src2, const char *name2,
                        int flag, int marker_size)
 {
        xmparam_t xmp;
-       int style = 0;
-       int favor = (flag >> 1) & 03;
 
        if (buffer_is_binary(orig->ptr, orig->size) ||
            buffer_is_binary(src1->ptr, src1->size) ||
@@ -73,69 +71,38 @@ static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
                        path, name1, name2);
                return ll_binary_merge(drv_unused, result,
                                       path,
-                                      orig, src1, name1,
+                                      orig, orig_name,
+                                      src1, name1,
                                       src2, name2,
                                       flag, marker_size);
        }
 
        memset(&xmp, 0, sizeof(xmp));
+       xmp.level = XDL_MERGE_ZEALOUS;
+       xmp.favor= (flag >> 1) & 03;
        if (git_xmerge_style >= 0)
-               style = git_xmerge_style;
+               xmp.style = git_xmerge_style;
        if (marker_size > 0)
                xmp.marker_size = marker_size;
-       return xdl_merge(orig,
-                        src1, name1,
-                        src2, name2,
-                        &xmp, XDL_MERGE_FLAGS(XDL_MERGE_ZEALOUS, style, favor),
-                        result);
+       xmp.ancestor = orig_name;
+       xmp.file1 = name1;
+       xmp.file2 = name2;
+       return xdl_merge(orig, src1, src2, &xmp, result);
 }
 
 static int ll_union_merge(const struct ll_merge_driver *drv_unused,
                          mmbuffer_t *result,
                          const char *path_unused,
-                         mmfile_t *orig,
+                         mmfile_t *orig, const char *orig_name,
                          mmfile_t *src1, const char *name1,
                          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, NULL, src1, NULL, src2, NULL,
+                           flag, marker_size);
        return 0;
 }
 
@@ -165,24 +132,24 @@ static void create_temp(mmfile_t *src, char *path)
 static int ll_ext_merge(const struct ll_merge_driver *fn,
                        mmbuffer_t *result,
                        const char *path,
-                       mmfile_t *orig,
+                       mmfile_t *orig, const char *orig_name,
                        mmfile_t *src1, const char *name1,
                        mmfile_t *src2, const char *name2,
                        int flag, int marker_size)
 {
        char temp[4][50];
        struct strbuf cmd = STRBUF_INIT;
-       struct strbuf_expand_dict_entry dict[] = {
-               { "O", temp[0] },
-               { "A", temp[1] },
-               { "B", temp[2] },
-               { "L", temp[3] },
-               { NULL }
-       };
+       struct strbuf_expand_dict_entry dict[5];
        const char *args[] = { NULL, NULL };
        int status, fd, i;
        struct stat st;
 
+       dict[0].placeholder = "O"; dict[0].value = temp[0];
+       dict[1].placeholder = "A"; dict[1].value = temp[1];
+       dict[2].placeholder = "B"; dict[2].value = temp[2];
+       dict[3].placeholder = "L"; dict[3].value = temp[3];
+       dict[4].placeholder = NULL; dict[4].value = NULL;
+
        if (fn->cmdline == NULL)
                die("custom merge driver %s lacks command line.", fn->name);
 
@@ -356,7 +323,7 @@ static int git_path_check_merge(const char *path, struct git_attr_check check[2]
 
 int ll_merge(mmbuffer_t *result_buf,
             const char *path,
-            mmfile_t *ancestor,
+            mmfile_t *ancestor, const char *ancestor_label,
             mmfile_t *ours, const char *our_label,
             mmfile_t *theirs, const char *their_label,
             int flag)
@@ -378,7 +345,7 @@ int ll_merge(mmbuffer_t *result_buf,
        driver = find_ll_merge_driver(ll_driver_name);
        if (virtual_ancestor && driver->recursive)
                driver = find_ll_merge_driver(driver->recursive);
-       return driver->fn(driver, result_buf, path, ancestor,
+       return driver->fn(driver, result_buf, path, ancestor, ancestor_label,
                          ours, our_label, theirs, their_label,
                          flag, marker_size);
 }