Jeff King <[email protected]> writes:
>> Yeah, unrolling the loop is probably better. You may even be able
>> to do so in a single pass with an extra "last > seen" pointer
>> variable without too much additional code complexity, I would think.
>
> I'm not sure what you mean here.
> If you mean doing a single pass to find the final ">", that is easy,
> because we know the length of the line already and can jump past and
> start from the back.
I meant a single forward pass, like this.
ident.c | 29 +++++++++++------------------
1 file changed, 11 insertions(+), 18 deletions(-)
diff --git a/ident.c b/ident.c
index 7d1c79c..ff29779 100644
--- a/ident.c
+++ b/ident.c
@@ -200,7 +200,7 @@ static void strbuf_addstr_without_crud(struct strbuf *sb,
const char *src)
*/
int split_ident_line(struct ident_split *split, const char *line, int len)
{
- const char *cp;
+ const char *cp, *last_ket;
size_t span;
int status = -1;
@@ -225,29 +225,22 @@ int split_ident_line(struct ident_split *split, const
char *line, int len)
split->name_end = split->name_begin;
}
- for (cp = split->mail_begin; cp < line + len; cp++)
- if (*cp == '>') {
+ for (cp = split->mail_begin, last_ket = NULL; cp < line + len; cp++) {
+ if (*cp != '>')
+ continue;
+ if (!last_ket)
split->mail_end = cp;
- break;
- }
+ last_ket = cp;
+ }
if (!split->mail_end)
return status;
/*
- * Look from the end-of-line to find the trailing ">" of the mail
- * address, even though we should already know it as split->mail_end.
- * This can help in cases of broken idents with an extra ">" somewhere
- * in the email address. Note that we are assuming the timestamp will
- * never have a ">" in it.
- *
- * Note that we will always find some ">" before going off the front of
- * the string, because will always hit the split->mail_end closing
- * bracket.
+ * Typically, last_ket is the same as split_mail_end, but with
+ * a broken identity line, there may be multiple closing ket '>';
+ * read the timestamp after the last one.
*/
- for (cp = line + len - 1; *cp != '>'; cp--)
- ;
-
- for (cp = cp + 1; cp < line + len && isspace(*cp); cp++)
+ for (cp = last_ket + 1; cp < line + len && isspace(*cp); cp++)
;
if (line + len <= cp)
goto person_only;
--
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