Make default merge messages denser.

diff --git a/commit.c b/commit.c
index a466f7da6648da80737805b392658c317772770b..21ac2fe9d71832896c21cae6528a2355068e654a 100644 (file)
--- a/commit.c
+++ b/commit.c
@@ -1,3 +1,4 @@
+#include <ctype.h>
 #include "tag.h"
 #include "commit.h"
 #include "cache.h"
@@ -129,7 +130,7 @@ void free_commit_list(struct commit_list *list)
        }
 }
 
-static void insert_by_date(struct commit_list **list, struct commit *item)
+void insert_by_date(struct commit_list **list, struct commit *item)
 {
        struct commit_list **pp = list;
        struct commit_list *p;
@@ -174,3 +175,130 @@ struct commit *pop_most_recent_commit(struct commit_list **list,
        }
        return ret;
 }
+
+/*
+ * Generic support for pretty-printing the header
+ */
+static int get_one_line(const char *msg, unsigned long len)
+{
+       int ret = 0;
+
+       while (len--) {
+               char c = *msg++;
+               ret++;
+               if (c == '\n')
+                       break;
+               if (!c)
+                       return 0;
+       }
+       return ret;
+}
+
+static int add_author_info(enum cmit_fmt fmt, char *buf, const char *line, int len)
+{
+       char *date;
+       unsigned int namelen;
+       unsigned long time;
+       int tz, ret;
+
+       line += strlen("author ");
+       date = strchr(line, '>');
+       if (!date)
+               return 0;
+       namelen = ++date - line;
+       time = strtoul(date, &date, 10);
+       tz = strtol(date, NULL, 10);
+
+       ret = sprintf(buf, "Author: %.*s\n", namelen, line);
+       if (fmt == CMIT_FMT_MEDIUM)
+               ret += sprintf(buf + ret, "Date:   %s\n", show_date(time, tz));
+       return ret;
+}
+
+static int is_empty_line(const char *line, int len)
+{
+       while (len && isspace(line[len-1]))
+               len--;
+       return !len;
+}
+
+unsigned long pretty_print_commit(enum cmit_fmt fmt, const char *msg, unsigned long len, char *buf, unsigned long space)
+{
+       int hdr = 1, body = 0;
+       unsigned long offset = 0;
+
+       for (;;) {
+               const char *line = msg;
+               int linelen = get_one_line(msg, len);
+
+               if (!linelen)
+                       break;
+
+               /*
+                * We want some slop for indentation and a possible
+                * final "...". Thus the "+ 20".
+                */
+               if (offset + linelen + 20 > space) {
+                       memcpy(buf + offset, "    ...\n", 8);
+                       offset += 8;
+                       break;
+               }
+
+               msg += linelen;
+               len -= linelen;
+               if (hdr) {
+                       if (linelen == 1) {
+                               hdr = 0;
+                               buf[offset++] = '\n';
+                               continue;
+                       }
+                       if (fmt == CMIT_FMT_RAW) {
+                               memcpy(buf + offset, line, linelen);
+                               offset += linelen;
+                               continue;
+                       }
+                       if (!memcmp(line, "author ", 7))
+                               offset += add_author_info(fmt, buf + offset, line, linelen);
+                       continue;
+               }
+
+               if (is_empty_line(line, linelen)) {
+                       if (!body)
+                               continue;
+                       if (fmt == CMIT_FMT_SHORT)
+                               break;
+               } else {
+                       body = 1;
+               }
+               memset(buf + offset, ' ', 4);
+               memcpy(buf + offset + 4, line, linelen);
+               offset += linelen + 4;
+       }
+       /* Make sure there is an EOLN */
+       if (buf[offset - 1] != '\n')
+               buf[offset++] = '\n';
+       buf[offset] = '\0';
+       return offset;
+}
+
+struct commit *pop_commit(struct commit_list **stack)
+{
+       struct commit_list *top = *stack;
+       struct commit *item = top ? top->item : NULL;
+
+       if (top) {
+               *stack = top->next;
+               free(top);
+       }
+       return item;
+}
+
+int count_parents(struct commit * commit)
+{
+        int count = 0;
+        struct commit_list * parents = commit->parents;
+        for (count=0;parents; parents=parents->next,count++)
+          ;
+        return count;
+}
+