From 6b0209f04a7a2fd3f8aec78808225177647c3aec Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Tue, 16 May 2023 10:24:29 -0400 Subject: int: Backport C23's _WIDTH macros --- tests/int.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 tests/int.c (limited to 'tests') diff --git a/tests/int.c b/tests/int.c new file mode 100644 index 0000000..db59e90 --- /dev/null +++ b/tests/int.c @@ -0,0 +1,54 @@ +// Copyright © Tavian Barnes +// SPDX-License-Identifier: 0BSD + +#include "../src/int.h" +#include "../src/diag.h" +#include +#include + +bfs_static_assert(UMAX_WIDTH(0x1) == 1); +bfs_static_assert(UMAX_WIDTH(0x3) == 2); +bfs_static_assert(UMAX_WIDTH(0x7) == 3); +bfs_static_assert(UMAX_WIDTH(0xF) == 4); +bfs_static_assert(UMAX_WIDTH(0xFF) == 8); +bfs_static_assert(UMAX_WIDTH(0xFFF) == 12); +bfs_static_assert(UMAX_WIDTH(0xFFFF) == 16); + +#define UWIDTH_MAX(n) (2 * ((UINTMAX_C(1) << ((n) - 1)) - 1) + 1) +#define IWIDTH_MAX(n) UWIDTH_MAX((n) - 1) +#define IWIDTH_MIN(n) (-(intmax_t)IWIDTH_MAX(n) - 1) + +bfs_static_assert(UCHAR_MAX == UWIDTH_MAX(UCHAR_WIDTH)); +bfs_static_assert(SCHAR_MIN == IWIDTH_MIN(SCHAR_WIDTH)); +bfs_static_assert(SCHAR_MAX == IWIDTH_MAX(SCHAR_WIDTH)); + +bfs_static_assert(USHRT_MAX == UWIDTH_MAX(USHRT_WIDTH)); +bfs_static_assert(SHRT_MIN == IWIDTH_MIN(SHRT_WIDTH)); +bfs_static_assert(SHRT_MAX == IWIDTH_MAX(SHRT_WIDTH)); + +bfs_static_assert(UINT_MAX == UWIDTH_MAX(UINT_WIDTH)); +bfs_static_assert(INT_MIN == IWIDTH_MIN(INT_WIDTH)); +bfs_static_assert(INT_MAX == IWIDTH_MAX(INT_WIDTH)); + +bfs_static_assert(ULONG_MAX == UWIDTH_MAX(ULONG_WIDTH)); +bfs_static_assert(LONG_MIN == IWIDTH_MIN(LONG_WIDTH)); +bfs_static_assert(LONG_MAX == IWIDTH_MAX(LONG_WIDTH)); + +bfs_static_assert(ULLONG_MAX == UWIDTH_MAX(ULLONG_WIDTH)); +bfs_static_assert(LLONG_MIN == IWIDTH_MIN(LLONG_WIDTH)); +bfs_static_assert(LLONG_MAX == IWIDTH_MAX(LLONG_WIDTH)); + +bfs_static_assert(SIZE_MAX == UWIDTH_MAX(SIZE_WIDTH)); +bfs_static_assert(PTRDIFF_MIN == IWIDTH_MIN(PTRDIFF_WIDTH)); +bfs_static_assert(PTRDIFF_MAX == IWIDTH_MAX(PTRDIFF_WIDTH)); + +bfs_static_assert(UINTPTR_MAX == UWIDTH_MAX(UINTPTR_WIDTH)); +bfs_static_assert(INTPTR_MIN == IWIDTH_MIN(INTPTR_WIDTH)); +bfs_static_assert(INTPTR_MAX == IWIDTH_MAX(INTPTR_WIDTH)); + +bfs_static_assert(UINTMAX_MAX == UWIDTH_MAX(UINTMAX_WIDTH)); +bfs_static_assert(INTMAX_MIN == IWIDTH_MIN(INTMAX_WIDTH)); +bfs_static_assert(INTMAX_MAX == IWIDTH_MAX(INTMAX_WIDTH)); + +int main(void) { +} -- cgit v1.2.3