From f05fdeb727a2fc8052900a159c225d328d603acc Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Fri, 5 Dec 2025 20:43:23 +0100 Subject: Second commit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- libj2_cto_j2u.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 libj2_cto_j2u.c (limited to 'libj2_cto_j2u.c') diff --git a/libj2_cto_j2u.c b/libj2_cto_j2u.c new file mode 100644 index 0000000..17ea8b6 --- /dev/null +++ b/libj2_cto_j2u.c @@ -0,0 +1,62 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" +#ifndef TEST + +extern inline unsigned libj2_cto_j2u(const struct libj2_j2u *a); +/* TODO Add man page */ + + +#else + +static uintmax_t +random_ju(void) +{ + size_t n = LIBJ2_JU_BIT; + uintmax_t r = 0; + while (n--) + if (rand() < rand()) + r |= (uintmax_t)1 << n; + return r; +} + + +int +main(void) +{ + struct libj2_j2u a, a_saved; + unsigned i, j; + + srand((unsigned)time(NULL)); + + for (i = 0; i <= LIBJ2_J2U_BIT; i++) { + for (j = 0; j < 64; j++) { + a.high = random_ju(); + a.low = random_ju(); + libj2_j2u_or_bit(&a, 0); + libj2_j2u_lsh(&a, i); + libj2_j2u_sub_ju(&a, 1); + a_saved = a; + + EXPECT(libj2_cto_j2u(&a) == i); + EXPECT(libj2_j2u_eq_j2u(&a, &a_saved)); + + if (i <= LIBJ2_JU_BIT) { + a.high = 0; + a_saved.high = 0; + EXPECT(libj2_cto_j2u(&a) == i); + EXPECT(libj2_j2u_eq_j2u(&a, &a_saved)); + } + + if (i < LIBJ2_JU_BIT) { + a.high = UINTMAX_MAX; + a_saved.high = UINTMAX_MAX; + EXPECT(libj2_cto_j2u(&a) == i); + EXPECT(libj2_j2u_eq_j2u(&a, &a_saved)); + } + } + } + + return 0; +} + +#endif -- cgit v1.2.3-70-g09d2