MinGW: implement mmap

diff --git a/diffcore-break.c b/diffcore-break.c
index acb18db1db27dc29fdb76bd519174aa56f56121d..d7097bb576cef8900e8e0218ba82e1cc7a87a567 100644 (file)
--- a/diffcore-break.c
+++ b/diffcore-break.c
@@ -45,15 +45,17 @@ static int should_break(struct diff_filespec *src,
         * The value we return is 1 if we want the pair to be broken,
         * or 0 if we do not.
         */
-       unsigned long delta_size, base_size, src_copied, literal_added,
-               src_removed;
+       unsigned long delta_size, max_size;
+       unsigned long src_copied, literal_added, src_removed;
 
        *merge_score_p = 0; /* assume no deletion --- "do not break"
                             * is the default.
                             */
 
-       if (!S_ISREG(src->mode) || !S_ISREG(dst->mode))
-               return 0; /* leave symlink rename alone */
+       if (S_ISREG(src->mode) != S_ISREG(dst->mode)) {
+               *merge_score_p = (int)MAX_SCORE;
+               return 1; /* even their types are different */
+       }
 
        if (src->sha1_valid && dst->sha1_valid &&
            !hashcmp(src->sha1, dst->sha1))
@@ -62,12 +64,11 @@ static int should_break(struct diff_filespec *src,
        if (diff_populate_filespec(src, 0) || diff_populate_filespec(dst, 0))
                return 0; /* error but caught downstream */
 
-       base_size = ((src->size < dst->size) ? src->size : dst->size);
-       if (base_size < MINIMUM_BREAK_SIZE)
+       max_size = ((src->size > dst->size) ? src->size : dst->size);
+       if (max_size < MINIMUM_BREAK_SIZE)
                return 0; /* we do not break too small filepair */
 
-       if (diffcore_count_changes(src->data, src->size,
-                                  dst->data, dst->size,
+       if (diffcore_count_changes(src, dst,
                                   NULL, NULL,
                                   0,
                                   &src_copied, &literal_added))
@@ -89,13 +90,15 @@ static int should_break(struct diff_filespec *src,
         * merge the surviving pair together if the score is
         * less than the minimum, after rename/copy runs.
         */
-       *merge_score_p = src_removed * MAX_SCORE / src->size;
+       *merge_score_p = (int)(src_removed * MAX_SCORE / src->size);
+       if (*merge_score_p > break_score)
+               return 1;
 
        /* Extent of damage, which counts both inserts and
         * deletes.
         */
        delta_size = src_removed + literal_added;
-       if (delta_size * MAX_SCORE / base_size < break_score)
+       if (delta_size * MAX_SCORE / max_size < break_score)
                return 0;
 
        /* If you removed a lot without adding new material, that is
@@ -166,11 +169,13 @@ void diffcore_break(int break_score)
                struct diff_filepair *p = q->queue[i];
                int score;
 
-               /* We deal only with in-place edit of non directory.
+               /*
+                * We deal only with in-place edit of blobs.
                 * We do not break anything else.
                 */
                if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two) &&
-                   !S_ISDIR(p->one->mode) && !S_ISDIR(p->two->mode) &&
+                   object_type(p->one->mode) == OBJ_BLOB &&
+                   object_type(p->two->mode) == OBJ_BLOB &&
                    !strcmp(p->one->path, p->two->path)) {
                        if (should_break(p->one, p->two,
                                         break_score, &score)) {