Make "git checkout" create new branches on demand

diff --git a/diffcore.h b/diffcore.h
index 5eca32afcc570c83338b6afbbba0db68bf8d2f84..f1b5ca748cae8d40f599552c3605080808da7803 100644 (file)
--- a/diffcore.h
+++ b/diffcore.h
@@ -8,12 +8,19 @@
  * (e.g. diffcore-rename, diffcore-pickaxe).  Never include this header
  * in anything else.
  */
-#define MAX_SCORE 10000
-#define DEFAULT_MINIMUM_SCORE 5000
 
-#define RENAME_DST_MATCHED 01
-#define RENAME_SRC_GONE    02
-#define RENAME_SCORE_SHIFT 8
+/* We internally use unsigned short as the score value,
+ * and rely on an int capable to hold 32-bits.  -B can take
+ * -Bmerge_score/break_score format and the two scores are
+ * passed around in one int (high 16-bit for merge and low 16-bit
+ * for break).
+ */
+#define MAX_SCORE 60000
+#define DEFAULT_RENAME_SCORE 30000 /* rename/copy similarity minimum (50%) */
+#define DEFAULT_BREAK_SCORE  30000 /* minimum for break to happen (50%)*/
+#define DEFAULT_MERGE_SCORE  48000 /* maximum for break-merge to happen (80%)*/
+
+#define MINIMUM_BREAK_SIZE     400 /* do not break a file smaller than this */
 
 struct diff_filespec {
        unsigned char sha1[20];
@@ -35,16 +42,34 @@ extern struct diff_filespec *alloc_filespec(const char *);
 extern void fill_filespec(struct diff_filespec *, const unsigned char *,
                          unsigned short);
 
-extern int diff_populate_filespec(struct diff_filespec *);
+extern int diff_populate_filespec(struct diff_filespec *, int);
 extern void diff_free_filespec_data(struct diff_filespec *);
 
 struct diff_filepair {
        struct diff_filespec *one;
        struct diff_filespec *two;
-       char *xfrm_msg;
-       int orig_order; /* the original order of insertion into the queue */
-       int xfrm_work; /* for use by tramsformers, not by diffcore */
+       unsigned short int score;
+       char status; /* M C R N D U (see Documentation/diff-format.txt) */
+       unsigned source_stays : 1; /* all of R/C are copies */
+       unsigned broken_pair : 1;
 };
+#define DIFF_PAIR_UNMERGED(p) \
+       (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
+
+#define DIFF_PAIR_RENAME(p) (strcmp((p)->one->path, (p)->two->path))
+
+#define DIFF_PAIR_BROKEN(p) \
+       ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \
+         ((p)->broken_pair != 0) )
+
+#define DIFF_PAIR_TYPE_CHANGED(p) \
+       ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
+
+#define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
+
+extern void diff_free_filepair(struct diff_filepair *);
+
+extern int diff_unmodified_pair(struct diff_filepair *);
 
 struct diff_queue_struct {
        struct diff_filepair **queue;
@@ -56,5 +81,24 @@ extern struct diff_queue_struct diff_queued_diff;
 extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
                                        struct diff_filespec *,
                                        struct diff_filespec *);
+extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);
+
+extern void diffcore_pathspec(const char **pathspec);
+extern void diffcore_break(int);
+extern void diffcore_rename(int rename_copy, int);
+extern void diffcore_merge_broken(void);
+extern void diffcore_pickaxe(const char *needle, int opts);
+extern void diffcore_order(const char *orderfile);
+
+#define DIFF_DEBUG 0
+#if DIFF_DEBUG
+void diff_debug_filespec(struct diff_filespec *, int, const char *);
+void diff_debug_filepair(const struct diff_filepair *, int);
+void diff_debug_queue(const char *, struct diff_queue_struct *);
+#else
+#define diff_debug_filespec(a,b,c) do {} while(0)
+#define diff_debug_filepair(a,b) do {} while(0)
+#define diff_debug_queue(a,b) do {} while(0)
+#endif
 
 #endif