[PATCH] Fix math thinko in similarity estimator.
[gitweb.git] / diff-helper.c
index 3c39c96d7e854f784e2c2dd06182fd0ec6e586a6..2dd6bdac33a470d3ff4f6fe63149ba33f167a4a3 100644 (file)
 /*
  * Copyright (C) 2005 Junio C Hamano
  */
-#include <limits.h>
 #include "cache.h"
 #include "strbuf.h"
 #include "diff.h"
+#include "diffcore.h" /* just for MAX_SCORE */
 
-static int detect_rename = 0;
-static int diff_score_opt = 0;
-static int generate_patch = 1;
 static const char *pickaxe = NULL;
-
-static int parse_oneside_change(const char *cp, int *mode,
-                               unsigned char *sha1, char *path)
-{
-       int ch, m;
-
-       m = 0;
-       while ((ch = *cp) && '0' <= ch && ch <= '7') {
-               m = (m << 3) | (ch - '0');
-               cp++;
-       }
-       *mode = m;
-       if (strncmp(cp, "\tblob\t", 6) && strncmp(cp, " blob ", 6) &&
-           strncmp(cp, "\ttree\t", 6) && strncmp(cp, " tree ", 6))
-               return -1;
-       cp += 6;
-       if (get_sha1_hex(cp, sha1))
-               return -1;
-       cp += 40;
-       if ((*cp != '\t') && *cp != ' ')
-               return -1;
-       strcpy(path, ++cp);
-       return 0;
-}
-
-static int parse_diff_raw_output(const char *buf)
-{
-       char path[PATH_MAX];
-       unsigned char old_sha1[20], new_sha1[20];
-       const char *cp = buf;
-       int ch, old_mode, new_mode;
-
-       switch (*cp++) {
-       case 'U':
-               diff_unmerge(cp + 1);
-               break;
-       case '+':
-               if (parse_oneside_change(cp, &new_mode, new_sha1, path))
-                       return -1;
-               diff_addremove('+', new_mode, new_sha1, path, NULL);
-               break;
-       case '-':
-               if (parse_oneside_change(cp, &old_mode, old_sha1, path))
-                       return -1;
-               diff_addremove('-', old_mode, old_sha1, path, NULL);
-               break;
-       case '*':
-               old_mode = new_mode = 0;
-               while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
-                       old_mode = (old_mode << 3) | (ch - '0');
-                       cp++;
-               }
-               if (strncmp(cp, "->", 2))
-                       return -1;
-               cp += 2;
-               while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
-                       new_mode = (new_mode << 3) | (ch - '0');
-                       cp++;
-               }
-               if (strncmp(cp, "\tblob\t", 6) && strncmp(cp, " blob ", 6) &&
-                   strncmp(cp, "\ttree\t", 6) && strncmp(cp, " tree ", 6))
-                       return -1;
-               cp += 6;
-               if (get_sha1_hex(cp, old_sha1))
-                       return -1;
-               cp += 40;
-               if (strncmp(cp, "->", 2))
-                       return -1;
-               cp += 2;
-               if (get_sha1_hex(cp, new_sha1))
-                       return -1;
-               cp += 40;
-               if ((*cp != '\t') && *cp != ' ')
-                       return -1;
-               strcpy(path, ++cp);
-               diff_change(old_mode, new_mode, old_sha1, new_sha1, path, NULL);
-               break;
-       default:
-               return -1;
-       }
-       return 0;
-}
+static int line_termination = '\n';
+static int inter_name_termination = '\t';
 
 static const char *diff_helper_usage =
-       "git-diff-helper [-z] [-R] [-M] [-C] [-S<string>] paths...";
+       "git-diff-helper [-z] [-S<string>] paths...";
 
 int main(int ac, const char **av) {
        struct strbuf sb;
-       int reverse = 0;
-       int line_termination = '\n';
 
        strbuf_init(&sb);
 
        while (1 < ac && av[1][0] == '-') {
-               if (av[1][1] == 'R')
-                       reverse = 1;
-               else if (av[1][1] == 'z')
-                       line_termination = 0;
-               else if (av[1][1] == 'p') /* hidden from the help */
-                       generate_patch = 0;
-               else if (av[1][1] == 'M') {
-                       detect_rename = 1;
-                       diff_score_opt = diff_scoreopt_parse(av[1]);
-               }
-               else if (av[1][1] == 'C') {
-                       detect_rename = 2;
-                       diff_score_opt = diff_scoreopt_parse(av[1]);
-               }
+               if (av[1][1] == 'z')
+                       line_termination = inter_name_termination = 0;
                else if (av[1][1] == 'S') {
                        pickaxe = av[1] + 2;
                }
@@ -127,22 +30,115 @@ int main(int ac, const char **av) {
        }
        /* the remaining parameters are paths patterns */
 
-       diff_setup(detect_rename, diff_score_opt, pickaxe,
-                  reverse, (generate_patch ? -1 : line_termination),
-                  av+1, ac-1);
-
+       diff_setup(0);
        while (1) {
-               int status;
+               unsigned old_mode, new_mode;
+               unsigned char old_sha1[20], new_sha1[20];
+               char old_path[PATH_MAX];
+               int status, score, two_paths;
+               char new_path[PATH_MAX];
+
+               int ch;
+               char *cp, *ep;
+
                read_line(&sb, stdin, line_termination);
                if (sb.eof)
                        break;
-               status = parse_diff_raw_output(sb.buf);
-               if (status) {
-                       diff_flush();
-                       printf("%s%c", sb.buf, line_termination);
+               switch (sb.buf[0]) {
+               case ':':
+                       /* parse the first part up to the status */
+                       cp = sb.buf + 1;
+                       old_mode = new_mode = 0;
+                       while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
+                               old_mode = (old_mode << 3) | (ch - '0');
+                               cp++;
+                       }
+                       if (*cp++ != ' ')
+                               break;
+                       while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
+                               new_mode = (new_mode << 3) | (ch - '0');
+                               cp++;
+                       }
+                       if (*cp++ != ' ')
+                               break;
+                       if (get_sha1_hex(cp, old_sha1))
+                               break;
+                       cp += 40;
+                       if (*cp++ != ' ')
+                               break;
+                       if (get_sha1_hex(cp, new_sha1))
+                               break;
+                       cp += 40;
+                       if (*cp++ != ' ')
+                               break;
+                       status = *cp++;
+                       if (!strchr("MCRNDU", status))
+                               break;
+                       two_paths = score = 0;
+                       if (status == 'R' || status == 'C') {
+                               two_paths = 1;
+                               sscanf(cp, "%d", &score);
+                               score = score * MAX_SCORE / 100;
+                               if (line_termination) {
+                                       cp = strchr(cp,
+                                                   inter_name_termination);
+                                       if (!cp)
+                                               break;
+                               }
+                       }
+
+                       if (*cp++ != inter_name_termination)
+                               break;
+
+                       /* first pathname */
+                       if (!line_termination) {
+                               read_line(&sb, stdin, line_termination);
+                               if (sb.eof)
+                                       break;
+                               strcpy(old_path, sb.buf);
+                       }
+                       else if (!two_paths)
+                               strcpy(old_path, cp);
+                       else {
+                               ep = strchr(cp, inter_name_termination);
+                               if (!ep)
+                                       break;
+                               strncpy(old_path, cp, ep-cp);
+                               old_path[ep-cp] = 0;
+                               cp = ep + 1;
+                       }
+
+                       /* second pathname */
+                       if (!two_paths)
+                               strcpy(new_path, old_path);
+                       else {
+                               if (!line_termination) {
+                                       read_line(&sb, stdin,
+                                                 line_termination);
+                                       if (sb.eof)
+                                               break;
+                                       strcpy(new_path, sb.buf);
+                               }
+                               else
+                                       strcpy(new_path, cp);
+                       }
+                       diff_helper_input(old_mode, new_mode,
+                                         old_sha1, new_sha1,
+                                         old_path, status, score,
+                                         new_path);
+                       continue;
                }
+               if (pickaxe)
+                       diffcore_pickaxe(pickaxe);
+               if (1 < ac)
+                       diffcore_pathspec(av + 1);
+               diff_flush(DIFF_FORMAT_PATCH, 0);
+               printf("%s\n", sb.buf);
        }
-
-       diff_flush();
+       if (pickaxe)
+               diffcore_pickaxe(pickaxe);
+       if (1 < ac)
+               diffcore_pathspec(av + 1);
+       diff_flush(DIFF_FORMAT_PATCH, 0);
        return 0;
 }