blame: avoid "diff -u0".

diff --git a/count-delta.c b/count-delta.c
index 3ee3a0ccf1b92f3f8838ca2e728bde9f60d1b8e8..058a2aadb1475801ea7573837867fa79bf1766c1 100644 (file)
--- a/count-delta.c
+++ b/count-delta.c
@@ -3,74 +3,11 @@
  * The delta-parsing part is almost straight copy of patch-delta.c
  * which is (C) 2005 Nicolas Pitre <nico@cam.org>.
  */
-#include "cache.h"
-#include "delta.h"
-#include "count-delta.h"
 #include <stdlib.h>
 #include <string.h>
 #include <limits.h>
-
-struct span {
-       struct span *next;
-       unsigned long ofs;
-       unsigned long end;
-};
-
-static void touch_range(struct span **span,
-                       unsigned long ofs, unsigned long end)
-{
-       struct span *e = *span;
-       struct span *p = NULL;
-
-       while (e && e->ofs <= ofs) {
-               again:
-               if (ofs < e->end) {
-                       while (e->end < end) {
-                               if (e->next && e->next->ofs <= end) {
-                                       e->end = e->next->ofs;
-                                       e = e->next;
-                               }
-                               else {
-                                       e->end = end;
-                                       return;
-                               }
-                       }
-                       return;
-               }
-               p = e;
-               e = e->next;
-       }
-       if (e && e->ofs <= end) {
-               e->ofs = ofs;
-               goto again;
-       }
-       else {
-               e = xmalloc(sizeof(*e));
-               e->ofs = ofs;
-               e->end = end;
-               if (p) {
-                       e->next = p->next;
-                       p->next = e;
-               }
-               else {
-                       e->next = *span;
-                       *span = e;
-               }
-       }
-}
-
-static unsigned long count_range(struct span *s)
-{
-       struct span *t;
-       unsigned long sz = 0;
-       while (s) {
-               t = s;
-               sz += s->end - s->ofs;
-               s = s->next;
-               free(t);
-       }
-       return sz;
-}
+#include "delta.h"
+#include "count-delta.h"
 
 /*
  * NOTE.  We do not _interpret_ delta fully.  As an approximation, we
@@ -84,11 +21,10 @@ static unsigned long count_range(struct span *s)
 int count_delta(void *delta_buf, unsigned long delta_size,
                unsigned long *src_copied, unsigned long *literal_added)
 {
-       unsigned long added_literal;
+       unsigned long copied_from_source, added_literal;
        const unsigned char *data, *top;
        unsigned char cmd;
        unsigned long src_size, dst_size, out;
-       struct span *span = NULL;
 
        if (delta_size < DELTA_SIZE_MIN)
                return -1;
@@ -99,7 +35,7 @@ int count_delta(void *delta_buf, unsigned long delta_size,
        src_size = get_delta_hdr_size(&data);
        dst_size = get_delta_hdr_size(&data);
 
-       added_literal = out = 0;
+       added_literal = copied_from_source = out = 0;
        while (data < top) {
                cmd = *data++;
                if (cmd & 0x80) {
@@ -113,7 +49,7 @@ int count_delta(void *delta_buf, unsigned long delta_size,
                        if (cmd & 0x40) cp_size |= (*data++ << 16);
                        if (cp_size == 0) cp_size = 0x10000;
 
-                       touch_range(&span, cp_off, cp_off+cp_size);
+                       copied_from_source += cp_size;
                        out += cp_size;
                } else {
                        /* write literal into dst */
@@ -123,8 +59,6 @@ int count_delta(void *delta_buf, unsigned long delta_size,
                }
        }
 
-       *src_copied = count_range(span);
-
        /* sanity check */
        if (data != top || out != dst_size)
                return -1;
@@ -132,6 +66,7 @@ int count_delta(void *delta_buf, unsigned long delta_size,
        /* delete size is what was _not_ copied from source.
         * edit size is that and literal additions.
         */
+       *src_copied = copied_from_source;
        *literal_added = added_literal;
        return 0;
 }