Implement line-history search (git log -L)

diff --git a/builtin/apply.c b/builtin/apply.c
index 445fea7af63c73d52facfaecc18f82d014d05217..06f5320b18bc5690ae944a722d19ec5496687228 100644 (file)
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -1041,15 +1041,17 @@ static int gitdiff_renamedst(const char *line, struct patch *patch)
 
 static int gitdiff_similarity(const char *line, struct patch *patch)
 {
-       if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
-               patch->score = 0;
+       unsigned long val = strtoul(line, NULL, 10);
+       if (val <= 100)
+               patch->score = val;
        return 0;
 }
 
 static int gitdiff_dissimilarity(const char *line, struct patch *patch)
 {
-       if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
-               patch->score = 0;
+       unsigned long val = strtoul(line, NULL, 10);
+       if (val <= 100)
+               patch->score = val;
        return 0;
 }
 
@@ -2095,7 +2097,7 @@ static void update_pre_post_images(struct image *preimage,
                                   char *buf,
                                   size_t len, size_t postlen)
 {
-       int i, ctx;
+       int i, ctx, reduced;
        char *new, *old, *fixed;
        struct image fixed_preimage;
 
@@ -2105,8 +2107,10 @@ static void update_pre_post_images(struct image *preimage,
         * free "oldlines".
         */
        prepare_image(&fixed_preimage, buf, len, 1);
-       assert(fixed_preimage.nr == preimage->nr);
-       for (i = 0; i < preimage->nr; i++)
+       assert(postlen
+              ? fixed_preimage.nr == preimage->nr
+              : fixed_preimage.nr <= preimage->nr);
+       for (i = 0; i < fixed_preimage.nr; i++)
                fixed_preimage.line[i].flag = preimage->line[i].flag;
        free(preimage->line_allocated);
        *preimage = fixed_preimage;
@@ -2126,7 +2130,8 @@ static void update_pre_post_images(struct image *preimage,
        else
                new = old;
        fixed = preimage->buf;
-       for (i = ctx = 0; i < postimage->nr; i++) {
+
+       for (i = reduced = ctx = 0; i < postimage->nr; i++) {
                size_t len = postimage->line[i].len;
                if (!(postimage->line[i].flag & LINE_COMMON)) {
                        /* an added line -- no counterparts in preimage */
@@ -2145,8 +2150,15 @@ static void update_pre_post_images(struct image *preimage,
                        fixed += preimage->line[ctx].len;
                        ctx++;
                }
-               if (preimage->nr <= ctx)
-                       die(_("oops"));
+
+               /*
+                * preimage is expected to run out, if the caller
+                * fixed addition of trailing blank lines.
+                */
+               if (preimage->nr <= ctx) {
+                       reduced++;
+                       continue;
+               }
 
                /* and copy it in, while fixing the line length */
                len = preimage->line[ctx].len;
@@ -2159,6 +2171,7 @@ static void update_pre_post_images(struct image *preimage,
 
        /* Fix the length of the whole thing */
        postimage->len = new - postimage->buf;
+       postimage->nr -= reduced;
 }
 
 static int match_fragment(struct image *img,