[PATCH v2 1/4] t-ctype: allow NUL anywhere in the specification string
- From
René Scharfe <l.s.r@web.de>
- Date
- Mar 3, 2024, 10:13 UTC
- Message-ID
- <20240303101330.20187-2-l.s.r@web.de>
- In-Reply-To
- <20240303101330.20187-1-l.s.r@web.de>
Replace the custom function is_in() for looking up a character in the specification string with memchr(3) and sizeof. This is shorter, simpler and allows NUL anywhere in the string, which may come in handy if we ever want to support more character classes that contain it.
Getting the string size using sizeof only works in a macro and with a string constant. Use ARRAY_SIZE and compile-time checks to make sure we are not passed a string pointer.
Signed-off-by: René Scharfe <l.s.r@web.de> --- t/unit-tests/t-ctype.c | 18 ++++-------------- 1 file changed, 4 insertions(+), 14 deletions(-)
diff --git a/t/unit-tests/t-ctype.c b/t/unit-tests/t-ctype.c index f315489984..35473c41d8 100644 --- a/t/unit-tests/t-ctype.c +++ b/t/unit-tests/t-ctype.c @@ -1,23 +1,13 @@ #include "test-lib.h" -static int is_in(const char *s, int ch) -{ - /* - * We can't find NUL using strchr. Accept it as the first - * character in the spec -- there are no empty classes. - */ - if (ch == '\0') - return ch == *s; - if (*s == '\0') - s++; - return !!strchr(s, ch); -} - /* Macro to test a character type */ #define TEST_CTYPE_FUNC(func, string) \ static void test_ctype_##func(void) { \ + size_t len = ARRAY_SIZE(string) - 1 + \ + BUILD_ASSERT_OR_ZERO(ARRAY_SIZE(string) > 0) + \ + BUILD_ASSERT_OR_ZERO(sizeof(string[0]) == sizeof(char)); \ for (int i = 0; i < 256; i++) { \ - if (!check_int(func(i), ==, is_in(string, i))) \ + if (!check_int(func(i), ==, !!memchr(string, i, len))) \ test_msg(" i: 0x%02x", i); \ } \ if (!check(!func(EOF))) \ -- 2.44.0