format-patch -n: make sorting easier by padding number
[git/git.git] / log-tree.c
index 4e3c7fd..ac86194 100644 (file)
@@ -102,6 +102,16 @@ static int append_signoff(char *buf, int buf_sz, int at, const char *signoff)
        return at;
 }
 
+static unsigned int digits_in_number(unsigned int number)
+{
+       unsigned int i = 10, result = 1;
+       while (i <= number) {
+               i *= 10;
+               result++;
+       }
+       return result;
+}
+
 void show_log(struct rev_info *opt, const char *sep)
 {
        static char this_header[16384];
@@ -155,7 +165,8 @@ void show_log(struct rev_info *opt, const char *sep)
                if (opt->total > 0) {
                        static char buffer[64];
                        snprintf(buffer, sizeof(buffer),
-                                       "Subject: [PATCH %d/%d] ",
+                                       "Subject: [PATCH %0*d/%d] ",
+                                       digits_in_number(opt->total),
                                        opt->nr, opt->total);
                        subject = buffer;
                } else if (opt->total == 0)