Merge branch 'jc/commit-hook-authorship'

[git.git] / ident.c

diff --git a/ident.c b/ident.c
index f619619b82379c2d205c7d7ea101049e373ab90a..87c697c2b09692ec8a36d557aa0c73de38223492 100644 (file)
--- a/ident.c
+++ b/ident.c
@@ -220,6 +220,74 @@ static int copy(char *buf, size_t size, int offset, const char *src)
        return offset;
 }
 
+/*
+ * Reverse of fmt_ident(); given an ident line, split the fields
+ * to allow the caller to parse it.
+ * Signal a success by returning 0, but date/tz fields of the result
+ * can still be NULL if the input line only has the name/email part
+ * (e.g. reading from a reflog entry).
+ */
+int split_ident_line(struct ident_split *split, const char *line, int len)
+{
+       const char *cp;
+       size_t span;
+       int status = -1;
+
+       memset(split, 0, sizeof(*split));
+
+       split->name_begin = line;
+       for (cp = line; *cp && cp < line + len; cp++)
+               if (*cp == '<') {
+                       split->mail_begin = cp + 1;
+                       break;
+               }
+       if (!split->mail_begin)
+               return status;
+
+       for (cp = split->mail_begin - 2; line < cp; cp--)
+               if (!isspace(*cp)) {
+                       split->name_end = cp + 1;
+                       break;
+               }
+       if (!split->name_end)
+               return status;
+
+       for (cp = split->mail_begin; cp < line + len; cp++)
+               if (*cp == '>') {
+                       split->mail_end = cp;
+                       break;
+               }
+       if (!split->mail_end)
+               return status;
+
+       for (cp = split->mail_end + 1; cp < line + len && isspace(*cp); cp++)
+               ;
+       if (line + len <= cp)
+               goto person_only;
+       split->date_begin = cp;
+       span = strspn(cp, "0123456789");
+       if (!span)
+               goto person_only;
+       split->date_end = split->date_begin + span;
+       for (cp = split->date_end; cp < line + len && isspace(*cp); cp++)
+               ;
+       if (line + len <= cp || (*cp != '+' && *cp != '-'))
+               goto person_only;
+       split->tz_begin = cp;
+       span = strspn(cp + 1, "0123456789");
+       if (!span)
+               goto person_only;
+       split->tz_end = split->tz_begin + 1 + span;
+       return 0;
+
+person_only:
+       split->date_begin = NULL;
+       split->date_end = NULL;
+       split->tz_begin = NULL;
+       split->tz_end = NULL;
+       return 0;
+}
+
 static const char *env_hint =
 "\n"
 "*** Please tell me who you are.\n"