fsck: make fsck_ident() warn-friendly

When fsck_ident() identifies a problem with the ident, it should still
advance the pointer to the next line so that fsck can continue in the
case of a mere warning.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

fsck.c

@@ -482,40 +482,45 @@ static int require_end_of_header(const void *data, unsigned long size,
 
 static int fsck_ident(const char **ident, struct object *obj, struct fsck_options *options)
 {
+	const char *p = *ident;
 	char *end;
 
-	if (**ident == '<')
+	*ident = strchrnul(*ident, '\n');
+	if (**ident == '\n')
+		(*ident)++;
+
+	if (*p == '<')
 		return report(options, obj, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email");
-	*ident += strcspn(*ident, "<>\n");
-	if (**ident == '>')
+	p += strcspn(p, "<>\n");
+	if (*p == '>')
 		return report(options, obj, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name");
-	if (**ident != '<')
+	if (*p != '<')
 		return report(options, obj, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email");
-	if ((*ident)[-1] != ' ')
+	if (p[-1] != ' ')
 		return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email");
-	(*ident)++;
-	*ident += strcspn(*ident, "<>\n");
-	if (**ident != '>')
+	p++;
+	p += strcspn(p, "<>\n");
+	if (*p != '>')
 		return report(options, obj, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email");
-	(*ident)++;
-	if (**ident != ' ')
+	p++;
+	if (*p != ' ')
 		return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date");
-	(*ident)++;
-	if (**ident == '0' && (*ident)[1] != ' ')
+	p++;
+	if (*p == '0' && p[1] != ' ')
 		return report(options, obj, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date");
-	if (date_overflows(strtoul(*ident, &end, 10)))
+	if (date_overflows(strtoul(p, &end, 10)))
 		return report(options, obj, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow");
-	if (end == *ident || *end != ' ')
+	if ((end == p || *end != ' '))
 		return report(options, obj, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date");
-	*ident = end + 1;
-	if ((**ident != '+' && **ident != '-') ||
-	    !isdigit((*ident)[1]) ||
-	    !isdigit((*ident)[2]) ||
-	    !isdigit((*ident)[3]) ||
-	    !isdigit((*ident)[4]) ||
-	    ((*ident)[5] != '\n'))
+	p = end + 1;
+	if ((*p != '+' && *p != '-') ||
+	    !isdigit(p[1]) ||
+	    !isdigit(p[2]) ||
+	    !isdigit(p[3]) ||
+	    !isdigit(p[4]) ||
+	    (p[5] != '\n'))
 		return report(options, obj, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone");
-	(*ident) += 6;
+	p += 6;
 	return 0;
 }