signature: Strip crud just like Git does

src/signature.c

@@ -34,13 +34,27 @@ static bool contains_angle_brackets(const char *input)
 	return strchr(input, '<') != NULL || strchr(input, '>') != NULL;
 }
 
+static bool is_crud(unsigned char c)
+{
+	return  c <= 32  ||
+		c == '.' ||
+		c == ',' ||
+		c == ':' ||
+		c == ';' ||
+		c == '<' ||
+		c == '>' ||
+		c == '"' ||
+		c == '\\' ||
+		c == '\'';
+}
+
 static char *extract_trimmed(const char *ptr, size_t len)
 {
-	while (len && git__isspace(ptr[0])) {
+	while (len && is_crud((unsigned char)ptr[0])) {
 		ptr++; len--;
 	}
 
-	while (len && git__isspace(ptr[len - 1])) {
+	while (len && is_crud((unsigned char)ptr[len - 1])) {
 		len--;
 	}
 

tests/commit/signature.c

@@ -35,6 +35,13 @@ void test_commit_signature__leading_and_trailing_spaces_are_trimmed(void)
 	assert_name_and_email("nulltoken", "emeric.fermas@gmail.com", " \t nulltoken \n", " \n  emeric.fermas@gmail.com  \n");
 }
 
+void test_commit_signature__leading_and_trailing_crud_is_trimmed(void)
+{
+	assert_name_and_email("nulltoken", "emeric.fermas@gmail.com", "\"nulltoken\"", "\"emeric.fermas@gmail.com\"");
+	assert_name_and_email("nulltoken w", "emeric.fermas@gmail.com", "nulltoken w.", "emeric.fermas@gmail.com");
+	assert_name_and_email("nulltoken \xe2\x98\xba", "emeric.fermas@gmail.com", "nulltoken \xe2\x98\xba", "emeric.fermas@gmail.com");
+}
+
 void test_commit_signature__angle_brackets_in_names_are_not_supported(void)
 {
 	cl_git_fail(try_build_signature("<Phil Haack", "phil@haack", 1234567890, 60));

tests/revwalk/signatureparsing.c

@@ -38,7 +38,7 @@ void test_revwalk_signatureparsing__do_not_choke_when_name_contains_angle_bracke
 
 	signature = git_commit_committer(commit);
 	cl_assert_equal_s("foo@example.com", signature->email);
-	cl_assert_equal_s("<Yu V. Bin Haacked>", signature->name);
+	cl_assert_equal_s("Yu V. Bin Haacked", signature->name);
 	cl_assert_equal_i(1323847743, (int)signature->when.time);
 	cl_assert_equal_i(60, signature->when.offset);