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src/test/test-macro.c
1 127 строк
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Zbigniew Jędrzejewski-Szmek
fundamental: add ABS_DIFF macro
11 апр 2026, 15:58
11 апр 2026, 15:58
efbd8a2
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/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include "tests.h" TEST(saturate_add) { assert_se(saturate_add(1, 2, UINT8_MAX) == 3); assert_se(saturate_add(1, UINT8_MAX-2, UINT8_MAX) == UINT8_MAX-1); assert_se(saturate_add(1, UINT8_MAX-1, UINT8_MAX) == UINT8_MAX); assert_se(saturate_add(1, UINT8_MAX, UINT8_MAX) == UINT8_MAX); assert_se(saturate_add(2, UINT8_MAX, UINT8_MAX) == UINT8_MAX); assert_se(saturate_add(60, 60, 50) == 50); } TEST(ALIGN_POWER2) { unsigned long i, p2; assert_se(ALIGN_POWER2(0) == 0); assert_se(ALIGN_POWER2(1) == 1); assert_se(ALIGN_POWER2(2) == 2); assert_se(ALIGN_POWER2(3) == 4); assert_se(ALIGN_POWER2(4) == 4); assert_se(ALIGN_POWER2(5) == 8); assert_se(ALIGN_POWER2(6) == 8); assert_se(ALIGN_POWER2(7) == 8); assert_se(ALIGN_POWER2(9) == 16); assert_se(ALIGN_POWER2(10) == 16); assert_se(ALIGN_POWER2(11) == 16); assert_se(ALIGN_POWER2(12) == 16); assert_se(ALIGN_POWER2(13) == 16); assert_se(ALIGN_POWER2(14) == 16); assert_se(ALIGN_POWER2(15) == 16); assert_se(ALIGN_POWER2(16) == 16); assert_se(ALIGN_POWER2(17) == 32); assert_se(ALIGN_POWER2(ULONG_MAX) == 0); assert_se(ALIGN_POWER2(ULONG_MAX - 1) == 0); assert_se(ALIGN_POWER2(ULONG_MAX - 1024) == 0); assert_se(ALIGN_POWER2(ULONG_MAX / 2) == ULONG_MAX / 2 + 1); assert_se(ALIGN_POWER2(ULONG_MAX + 1) == 0); for (i = 1; i < 131071; ++i) { for (p2 = 1; p2 < i; p2 <<= 1) /* empty */ ; assert_se(ALIGN_POWER2(i) == p2); } for (i = ULONG_MAX - 1024; i < ULONG_MAX; ++i) { for (p2 = 1; p2 && p2 < i; p2 <<= 1) /* empty */ ; assert_se(ALIGN_POWER2(i) == p2); } } TEST(MAX) { static const struct { int a; int b[CONST_MAX(10, 100)]; } val1 = { .a = CONST_MAX(10, 100), }; int d = 0; unsigned long x = 12345; unsigned long y = 54321; const char str[] = "a_string_constant"; const unsigned long long arr[] = {9999ULL, 10ULL, 0ULL, 3000ULL, 2000ULL, 1000ULL, 100ULL, 9999999ULL}; void *p = (void *)str; void *q = (void *)&str[16]; assert_cc(sizeof(val1.b) == sizeof(int) * 100); /* CONST_MAX returns (void) instead of a value if the passed arguments * are not of the same type or not constant expressions. */ assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 10)), int)); assert_cc(__builtin_types_compatible_p(typeof(CONST_MAX(1, 1U)), typeof(VOID_0))); assert_se(val1.a == 100); assert_se(MAX(++d, 0) == 1); assert_se(d == 1); assert_cc(MAXSIZE(char[3], uint16_t) == 3); assert_cc(MAXSIZE(char[3], uint32_t) == 4); assert_cc(MAXSIZE(char, long) == sizeof(long)); assert_se(MAX(-5, 5) == 5); assert_se(MAX(5, 5) == 5); assert_se(MAX(MAX(1, MAX(2, MAX(3, 4))), 5) == 5); assert_se(MAX(MAX(1, MAX(2, MAX(3, 2))), 1) == 3); assert_se(MAX(MIN(1, MIN(2, MIN(3, 4))), 5) == 5); assert_se(MAX(MAX(1, MIN(2, MIN(3, 2))), 1) == 2); assert_se(LESS_BY(8, 4) == 4); assert_se(LESS_BY(8, 8) == 0); assert_se(LESS_BY(4, 8) == 0); assert_se(LESS_BY(16, LESS_BY(8, 4)) == 12); assert_se(LESS_BY(4, LESS_BY(8, 4)) == 0); assert_se(CMP(3, 5) == -1); assert_se(CMP(5, 3) == 1); assert_se(CMP(5, 5) == 0); assert_se(CMP(x, y) == -1); assert_se(CMP(y, x) == 1); assert_se(CMP(x, x) == 0); assert_se(CMP(y, y) == 0); assert_se(CMP(UINT64_MAX, (uint64_t) 0) == 1); assert_se(CMP((uint64_t) 0, UINT64_MAX) == -1); assert_se(CMP(UINT64_MAX, UINT64_MAX) == 0); assert_se(CMP(INT64_MIN, INT64_MAX) == -1); assert_se(CMP(INT64_MAX, INT64_MIN) == 1); assert_se(CMP(INT64_MAX, INT64_MAX) == 0); assert_se(CMP(INT64_MIN, INT64_MIN) == 0); assert_se(CMP(INT64_MAX, (int64_t) 0) == 1); assert_se(CMP((int64_t) 0, INT64_MIN) == 1); assert_se(CMP(INT64_MIN, (int64_t) 0) == -1); assert_se(CMP((int64_t) 0, INT64_MAX) == -1); assert_se(CMP(&str[2], &str[7]) == -1); assert_se(CMP(&str[2], &str[2]) == 0); assert_se(CMP(&str[7], (const char *)str) == 1); assert_se(CMP(str[2], str[7]) == 1); assert_se(CMP(str[7], *str) == 1); assert_se(CMP((const unsigned long long *)arr, &arr[3]) == -1); assert_se(CMP(*arr, arr[3]) == 1); assert_se(CMP(p, q) == -1); assert_se(CMP(q, p) == 1); assert_se(CMP(p, p) == 0); assert_se(CMP(q, q) == 0); assert_se(CLAMP(-5, 0, 1) == 0); assert_se(CLAMP(5, 0, 1) == 1); assert_se(CLAMP(5, -10, 1) == 1); assert_se(CLAMP(5, -10, 10) == 5); assert_se(CLAMP(CLAMP(0, -10, 10), CLAMP(-5, 10, 20), CLAMP(100, -5, 20)) == 10); } TEST(ABS_DIFF) { ASSERT_EQ(ABS_DIFF(5, 3), 2); ASSERT_EQ(ABS_DIFF(3, 5), 2); ASSERT_EQ(ABS_DIFF(5llu, 2llu), 3llu); ASSERT_EQ(ABS_DIFF(3llu, 5llu), 2llu); } #pragma GCC diagnostic push #ifdef __clang__ # pragma GCC diagnostic ignored "-Waddress-of-packed-member" #endif TEST(container_of) { struct mytype { uint8_t pad1[3]; uint64_t v1; uint8_t pad2[2]; uint32_t v2; } myval = { }; assert_cc(sizeof(myval) >= 17); assert_se(container_of(&myval.v1, struct mytype, v1) == &myval); assert_se(container_of(&myval.v2, struct mytype, v2) == &myval); assert_se(container_of(&container_of(&myval.v2, struct mytype, v2)->v1, struct mytype, v1) == &myval); } #pragma GCC diagnostic pop #define TEST_OVERFLOW_MATH_BY_TYPE(type, min, max, lit) \ ({ \ type x; \ \ assert_se(ADD_SAFE(&x, lit(5), lit(10))); \ assert_se(x == lit(15)); \ if (IS_SIGNED_INTEGER_TYPE(type)) { \ assert_se(ADD_SAFE(&x, lit(5), lit(-10))); \ assert_se(x == lit(-5)); \ } \ assert_se(ADD_SAFE(&x, min, lit(0))); \ assert_se(x == min); \ assert_se(ADD_SAFE(&x, max, lit(0))); \ assert_se(x == max); \ if (IS_SIGNED_INTEGER_TYPE(type)) \ assert_se(!ADD_SAFE(&x, min, lit(-1))); \ assert_se(!ADD_SAFE(&x, max, lit(1))); \ \ x = lit(5); \ assert_se(INC_SAFE(&x, lit(10))); \ assert_se(x == lit(15)); \ if (IS_SIGNED_INTEGER_TYPE(type)) { \ assert_se(INC_SAFE(&x, lit(-20))); \ assert_se(x == lit(-5)); \ } \ x = min; \ assert_se(INC_SAFE(&x, lit(0))); \ assert_se(x == min); \ if (IS_SIGNED_INTEGER_TYPE(type)) \ assert_se(!INC_SAFE(&x, lit(-1))); \ x = max; \ assert_se(INC_SAFE(&x, lit(0))); \ assert_se(x == max); \ assert_se(!INC_SAFE(&x, lit(1))); \ \ assert_se(SUB_SAFE(&x, lit(10), lit(5))); \ assert_se(x == lit(5)); \ if (IS_SIGNED_INTEGER_TYPE(type)) { \ assert_se(SUB_SAFE(&x, lit(5), lit(10))); \ assert_se(x == lit(-5)); \ \ assert_se(SUB_SAFE(&x, lit(5), lit(-10))); \ assert_se(x == lit(15)); \ } else \ assert_se(!SUB_SAFE(&x, lit(5), lit(10))); \ assert_se(SUB_SAFE(&x, min, lit(0))); \ assert_se(x == min); \ assert_se(SUB_SAFE(&x, max, lit(0))); \ assert_se(x == max); \ assert_se(!SUB_SAFE(&x, min, lit(1))); \ if (IS_SIGNED_INTEGER_TYPE(type)) \ assert_se(!SUB_SAFE(&x, max, lit(-1))); \ \ x = lit(10); \ assert_se(DEC_SAFE(&x, lit(5))); \ assert_se(x == lit(5)); \ if (IS_SIGNED_INTEGER_TYPE(type)) { \ assert_se(DEC_SAFE(&x, lit(10))); \ assert_se(x == lit(-5)); \ \ x = lit(5); \ assert_se(DEC_SAFE(&x, lit(-10))); \ assert_se(x == lit(15)); \ } else \ assert_se(!DEC_SAFE(&x, lit(10))); \ x = min; \ assert_se(DEC_SAFE(&x, lit(0))); \ assert_se(x == min); \ assert_se(!DEC_SAFE(&x, lit(1))); \ x = max; \ assert_se(DEC_SAFE(&x, lit(0))); \ if (IS_SIGNED_INTEGER_TYPE(type)) \ assert_se(!DEC_SAFE(&x, lit(-1))); \ \ assert_se(MUL_SAFE(&x, lit(2), lit(4))); \ assert_se(x == lit(8)); \ if (IS_SIGNED_INTEGER_TYPE(type)) { \ assert_se(MUL_SAFE(&x, lit(2), lit(-4))); \ assert_se(x == lit(-8)); \ } \ assert_se(MUL_SAFE(&x, lit(5), lit(0))); \ assert_se(x == lit(0)); \ assert_se(MUL_SAFE(&x, min, lit(1))); \ assert_se(x == min); \ if (IS_SIGNED_INTEGER_TYPE(type)) \ assert_se(!MUL_SAFE(&x, min, lit(2))); \ assert_se(MUL_SAFE(&x, max, lit(1))); \ assert_se(x == max); \ assert_se(!MUL_SAFE(&x, max, lit(2))); \ \ x = lit(2); \ assert_se(MUL_ASSIGN_SAFE(&x, lit(4))); \ assert_se(x == lit(8)); \ if (IS_SIGNED_INTEGER_TYPE(type)) { \ assert_se(MUL_ASSIGN_SAFE(&x, lit(-1))); \ assert_se(x == lit(-8)); \ } \ assert_se(MUL_ASSIGN_SAFE(&x, lit(0))); \ assert_se(x == lit(0)); \ x = min; \ assert_se(MUL_ASSIGN_SAFE(&x, lit(1))); \ assert_se(x == min); \ if IS_SIGNED_INTEGER_TYPE(type) \ assert_se(!MUL_ASSIGN_SAFE(&x, lit(2))); \ x = max; \ assert_se(MUL_ASSIGN_SAFE(&x, lit(1))); \ assert_se(x == max); \ assert_se(!MUL_ASSIGN_SAFE(&x, lit(2))); \ }) TEST(overflow_safe_math) { int64_t i; uint64_t u, *p; /* basic tests */ TEST_OVERFLOW_MATH_BY_TYPE(int8_t, INT8_MIN, INT8_MAX, INT8_C); TEST_OVERFLOW_MATH_BY_TYPE(int16_t, INT16_MIN, INT16_MAX, INT16_C); TEST_OVERFLOW_MATH_BY_TYPE(int32_t, INT32_MIN, INT32_MAX, INT32_C); TEST_OVERFLOW_MATH_BY_TYPE(int64_t, INT64_MIN, INT64_MAX, INT64_C); #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wtype-limits" /* Otherwise the compiler complains about comparisons to negative numbers always being false */ TEST_OVERFLOW_MATH_BY_TYPE(uint8_t, UINT8_C(0), UINT8_MAX, UINT8_C); TEST_OVERFLOW_MATH_BY_TYPE(uint16_t, UINT16_C(0), UINT16_MAX, UINT16_C); TEST_OVERFLOW_MATH_BY_TYPE(uint32_t, UINT32_C(0), UINT32_MAX, UINT32_C); TEST_OVERFLOW_MATH_BY_TYPE(uint64_t, UINT64_C(0), UINT64_MAX, UINT64_C); #pragma GCC diagnostic pop /* make sure we handle pointers correctly */ p = &u; assert_se(ADD_SAFE(p, 35, 15) && (u == 50)); assert_se(SUB_SAFE(p, 35, 15) && (u == 20)); assert_se(MUL_SAFE(p, 5, 10) && (u == 50)); assert_se(INC_SAFE(p, 10) && (u == 60)); assert_se(DEC_SAFE(p, 10) && (u == 50)); assert_se(MUL_ASSIGN_SAFE(p, 3) && (u == 150)); assert_se(!ADD_SAFE(p, UINT64_MAX, 1)); assert_se(!SUB_SAFE(p, 0, 1)); /* cross-type sanity checks */ assert_se(ADD_SAFE(&i, INT32_MAX, 1)); assert_se(SUB_SAFE(&i, INT32_MIN, 1)); assert_se(!ADD_SAFE(&i, UINT64_MAX, 0)); assert_se(ADD_SAFE(&u, INT32_MAX, 1)); assert_se(MUL_SAFE(&u, INT32_MAX, 2)); } TEST(DIV_ROUND_UP) { int div; /* basic tests */ assert_se(DIV_ROUND_UP(0, 8) == 0); assert_se(DIV_ROUND_UP(1, 8) == 1); assert_se(DIV_ROUND_UP(8, 8) == 1); assert_se(DIV_ROUND_UP(12, 8) == 2); assert_se(DIV_ROUND_UP(16, 8) == 2); /* test multiple evaluation */ div = 0; assert_se(DIV_ROUND_UP(div++, 8) == 0 && div == 1); assert_se(DIV_ROUND_UP(++div, 8) == 1 && div == 2); assert_se(DIV_ROUND_UP(8, div++) == 4 && div == 3); assert_se(DIV_ROUND_UP(8, ++div) == 2 && div == 4); /* overflow test with exact division */ assert_se(sizeof(0U) == 4); assert_se(0xfffffffaU % 10U == 0U); assert_se(0xfffffffaU / 10U == 429496729U); assert_se(DIV_ROUND_UP(0xfffffffaU, 10U) == 429496729U); assert_se((0xfffffffaU + 10U - 1U) / 10U == 0U); assert_se(0xfffffffaU / 10U + !!(0xfffffffaU % 10U) == 429496729U); /* overflow test with rounded division */ assert_se(0xfffffffdU % 10U == 3U); assert_se(0xfffffffdU / 10U == 429496729U); assert_se(DIV_ROUND_UP(0xfffffffdU, 10U) == 429496730U); assert_se((0xfffffffdU + 10U - 1U) / 10U == 0U); assert_se(0xfffffffdU / 10U + !!(0xfffffffdU % 10U) == 429496730U); } TEST(PTR_TO_INT) { /* Primary reason to have this test is to validate that pointers are large enough to hold entire int range */ assert_se(PTR_TO_INT(INT_TO_PTR(0)) == 0); assert_se(PTR_TO_INT(INT_TO_PTR(1)) == 1); assert_se(PTR_TO_INT(INT_TO_PTR(-1)) == -1); assert_se(PTR_TO_INT(INT_TO_PTR(INT_MAX)) == INT_MAX); assert_se(PTR_TO_INT(INT_TO_PTR(INT_MIN)) == INT_MIN); } TEST(IN_SET) { assert_se(IN_SET(1, 1, 2)); assert_se(IN_SET(1, 1, 2, 3, 4)); assert_se(IN_SET(2, 1, 2, 3, 4)); assert_se(IN_SET(3, 1, 2, 3, 4)); assert_se(IN_SET(4, 1, 2, 3, 4)); assert_se(!IN_SET(0, 1, 2)); assert_se(!IN_SET(0, 1, 2, 3, 4)); struct { unsigned x:3; } t = { 1 }; assert_se(IN_SET(t.x, 1, 2)); assert_se(IN_SET(t.x, 1, 2, 3, 4)); assert_se(IN_SET(t.x, 2, 3, 4, 1)); assert_se(!IN_SET(t.x, 0, 2)); assert_se(!IN_SET(t.x, 2, 3, 4)); } TEST(FOREACH_ARGUMENT) { size_t i; i = 0; uint8_t u8, u8_1 = 1, u8_2 = 2, u8_3 = 3; FOREACH_ARGUMENT(u8, u8_2, 8, 0xff, u8_1, u8_3, 0, 1) { switch (i++) { case 0: assert_se(u8 == u8_2); break; case 1: assert_se(u8 == 8); break; case 2: assert_se(u8 == 0xff); break; case 3: assert_se(u8 == u8_1); break; case 4: assert_se(u8 == u8_3); break; case 5: assert_se(u8 == 0); break; case 6: assert_se(u8 == 1); break; default: assert_se(false); } } assert_se(i == 7); i = 0; FOREACH_ARGUMENT(u8, 0) { assert_se(u8 == 0); assert_se(i++ == 0); } assert_se(i == 1); i = 0; FOREACH_ARGUMENT(u8, 0xff) { assert_se(u8 == 0xff); assert_se(i++ == 0); } assert_se(i == 1); FOREACH_ARGUMENT(u8) assert_se(false); i = 0; uint32_t u32, u32_1 = 0xffff0000, u32_2 = 10, u32_3 = 0xffff; FOREACH_ARGUMENT(u32, 1, 100, u32_2, 1000, u32_3, u32_1, 1, 0) { switch (i++) { case 0: assert_se(u32 == 1); break; case 1: assert_se(u32 == 100); break; case 2: assert_se(u32 == u32_2); break; case 3: assert_se(u32 == 1000); break; case 4: assert_se(u32 == u32_3); break; case 5: assert_se(u32 == u32_1); break; case 6: assert_se(u32 == 1); break; case 7: assert_se(u32 == 0); break; default: assert_se(false); } } assert_se(i == 8); i = 0; FOREACH_ARGUMENT(u32, 0) { assert_se(u32 == 0); assert_se(i++ == 0); } assert_se(i == 1); i = 0; FOREACH_ARGUMENT(u32, 1000) { assert_se(u32 == 1000); assert_se(i++ == 0); } assert_se(i == 1); FOREACH_ARGUMENT(u32) assert_se(false); i = 0; uint64_t u64, u64_1 = 0xffffffffffffffff, u64_2 = 50, u64_3 = 0xffff; FOREACH_ARGUMENT(u64, 44, 0, u64_3, 100, u64_2, u64_1, 50000) { switch (i++) { case 0: assert_se(u64 == 44); break; case 1: assert_se(u64 == 0); break; case 2: assert_se(u64 == u64_3); break; case 3: assert_se(u64 == 100); break; case 4: assert_se(u64 == u64_2); break; case 5: assert_se(u64 == u64_1); break; case 6: assert_se(u64 == 50000); break; default: assert_se(false); } } assert_se(i == 7); i = 0; FOREACH_ARGUMENT(u64, 0) { assert_se(u64 == 0); assert_se(i++ == 0); } assert_se(i == 1); i = 0; FOREACH_ARGUMENT(u64, 0xff00ff00000000) { assert_se(u64 == 0xff00ff00000000); assert_se(i++ == 0); } assert_se(i == 1); FOREACH_ARGUMENT(u64) assert_se(false); struct test { int a; char b; }; i = 0; struct test s, s_1 = { .a = 0, .b = 'c', }, s_2 = { .a = 100000, .b = 'z', }, s_3 = { .a = 0xff, .b = 'q', }, s_4 = { .a = 1, .b = 'x', }; FOREACH_ARGUMENT(s, s_1, (struct test){ .a = 10, .b = 'd', }, s_2, (struct test){}, s_3, s_4) { switch (i++) { case 0: assert_se(s.a == 0 ); assert_se(s.b == 'c'); break; case 1: assert_se(s.a == 10 ); assert_se(s.b == 'd'); break; case 2: assert_se(s.a == 100000); assert_se(s.b == 'z'); break; case 3: assert_se(s.a == 0 ); assert_se(s.b == 0 ); break; case 4: assert_se(s.a == 0xff ); assert_se(s.b == 'q'); break; case 5: assert_se(s.a == 1 ); assert_se(s.b == 'x'); break; default: assert_se(false); } } assert_se(i == 6); i = 0; FOREACH_ARGUMENT(s, (struct test){ .a = 1, .b = 'A', }) { assert_se(s.a == 1); assert_se(s.b == 'A'); assert_se(i++ == 0); } assert_se(i == 1); FOREACH_ARGUMENT(s) assert_se(false); i = 0; struct test *p, *p_1 = &s_1, *p_2 = &s_2, *p_3 = &s_3, *p_4 = &s_4; FOREACH_ARGUMENT(p, p_1, NULL, p_2, p_3, NULL, p_4, NULL) { switch (i++) { case 0: assert_se(p == p_1); break; case 1: ASSERT_NULL(p); break; case 2: assert_se(p == p_2); break; case 3: assert_se(p == p_3); break; case 4: ASSERT_NULL(p); break; case 5: assert_se(p == p_4); break; case 6: ASSERT_NULL(p); break; default: assert_se(false); } } assert_se(i == 7); i = 0; FOREACH_ARGUMENT(p, p_3) { assert_se(p == p_3); assert_se(i++ == 0); } assert_se(i == 1); FOREACH_ARGUMENT(p) assert_se(false); i = 0; void *v, *v_1 = p_1, *v_2 = p_2, *v_3 = p_3; uint32_t *u32p = &u32; FOREACH_ARGUMENT(v, v_1, NULL, u32p, v_3, p_2, p_4, v_2, NULL) { switch (i++) { case 0: assert_se(v == v_1); break; case 1: ASSERT_NULL(v); break; case 2: assert_se(v == u32p); break; case 3: assert_se(v == v_3); break; case 4: assert_se(v == p_2); break; case 5: assert_se(v == p_4); break; case 6: assert_se(v == v_2); break; case 7: ASSERT_NULL(v); break; default: assert_se(false); } } assert_se(i == 8); i = 0; FOREACH_ARGUMENT(v, NULL) { ASSERT_NULL(v); assert_se(i++ == 0); } assert_se(i == 1); i = 0; FOREACH_ARGUMENT(v, v_1) { assert_se(v == v_1); assert_se(i++ == 0); } assert_se(i == 1); FOREACH_ARGUMENT(v) assert_se(false); } TEST(ALIGN_TO) { assert_se(ALIGN_TO(0, 1) == 0); assert_se(ALIGN_TO(1, 1) == 1); assert_se(ALIGN_TO(2, 1) == 2); assert_se(ALIGN_TO(3, 1) == 3); assert_se(ALIGN_TO(4, 1) == 4); assert_se(ALIGN_TO(SIZE_MAX-1, 1) == SIZE_MAX-1); assert_se(ALIGN_TO(SIZE_MAX, 1) == SIZE_MAX); assert_se(ALIGN_TO(0, 2) == 0); assert_se(ALIGN_TO(1, 2) == 2); assert_se(ALIGN_TO(2, 2) == 2); assert_se(ALIGN_TO(3, 2) == 4); assert_se(ALIGN_TO(4, 2) == 4); assert_se(ALIGN_TO(SIZE_MAX-3, 2) == SIZE_MAX-3); assert_se(ALIGN_TO(SIZE_MAX-2, 2) == SIZE_MAX-1); assert_se(ALIGN_TO(SIZE_MAX-1, 2) == SIZE_MAX-1); assert_se(ALIGN_TO(SIZE_MAX, 2) == SIZE_MAX); /* overflow */ assert_se(ALIGN_TO(0, 4) == 0); assert_se(ALIGN_TO(1, 4) == 4); assert_se(ALIGN_TO(2, 4) == 4); assert_se(ALIGN_TO(3, 4) == 4); assert_se(ALIGN_TO(4, 4) == 4); assert_se(ALIGN_TO(SIZE_MAX-3, 4) == SIZE_MAX-3); assert_se(ALIGN_TO(SIZE_MAX-2, 4) == SIZE_MAX); /* overflow */ assert_se(ALIGN_TO(SIZE_MAX-1, 4) == SIZE_MAX); /* overflow */ assert_se(ALIGN_TO(SIZE_MAX, 4) == SIZE_MAX); /* overflow */ assert_se(ALIGN_TO_U64(0, 1) == 0); assert_se(ALIGN_TO_U64(1, 1) == 1); assert_se(ALIGN_TO_U64(2, 1) == 2); assert_se(ALIGN_TO_U64(3, 1) == 3); assert_se(ALIGN_TO_U64(4, 1) == 4); assert_se(ALIGN_TO_U64(UINT64_MAX-1, 1) == UINT64_MAX-1); assert_se(ALIGN_TO_U64(UINT64_MAX, 1) == UINT64_MAX); assert_se(ALIGN_TO_U64(0, 2) == 0); assert_se(ALIGN_TO_U64(1, 2) == 2); assert_se(ALIGN_TO_U64(2, 2) == 2); assert_se(ALIGN_TO_U64(3, 2) == 4); assert_se(ALIGN_TO_U64(4, 2) == 4); assert_se(ALIGN_TO_U64(UINT64_MAX-3, 2) == UINT64_MAX-3); assert_se(ALIGN_TO_U64(UINT64_MAX-2, 2) == UINT64_MAX-1); assert_se(ALIGN_TO_U64(UINT64_MAX-1, 2) == UINT64_MAX-1); assert_se(ALIGN_TO_U64(UINT64_MAX, 2) == UINT64_MAX); /* overflow */ assert_se(ALIGN_TO_U64(0, 4) == 0); assert_se(ALIGN_TO_U64(1, 4) == 4); assert_se(ALIGN_TO_U64(2, 4) == 4); assert_se(ALIGN_TO_U64(3, 4) == 4); assert_se(ALIGN_TO_U64(4, 4) == 4); assert_se(ALIGN_TO_U64(UINT64_MAX-3, 4) == UINT64_MAX-3); assert_se(ALIGN_TO_U64(UINT64_MAX-2, 4) == UINT64_MAX); /* overflow */ assert_se(ALIGN_TO_U64(UINT64_MAX-1, 4) == UINT64_MAX); /* overflow */ assert_se(ALIGN_TO_U64(UINT64_MAX, 4) == UINT64_MAX); /* overflow */ assert_cc(CONST_ALIGN_TO(96, 512) == 512); assert_cc(CONST_ALIGN_TO(511, 512) == 512); assert_cc(CONST_ALIGN_TO(512, 512) == 512); assert_cc(CONST_ALIGN_TO(513, 512) == 1024); assert_cc(CONST_ALIGN_TO(sizeof(int), 64) == 64); assert_cc(__builtin_types_compatible_p(typeof(CONST_ALIGN_TO(4, 3)), typeof(VOID_0))); assert_cc(__builtin_types_compatible_p(typeof(CONST_ALIGN_TO(SIZE_MAX, 512)), typeof(VOID_0))); } TEST(align_down) { assert_se(ALIGN_DOWN(0, 1) == 0); assert_se(ALIGN_DOWN(1, 1) == 1); assert_se(ALIGN_DOWN(2, 1) == 2); assert_se(ALIGN_DOWN(3, 1) == 3); assert_se(ALIGN_DOWN(4, 1) == 4); assert_se(ALIGN_DOWN(SIZE_MAX-1, 1) == SIZE_MAX-1); assert_se(ALIGN_DOWN(SIZE_MAX, 1) == SIZE_MAX); assert_se(ALIGN_DOWN(0, 2) == 0); assert_se(ALIGN_DOWN(1, 2) == 0); assert_se(ALIGN_DOWN(2, 2) == 2); assert_se(ALIGN_DOWN(3, 2) == 2); assert_se(ALIGN_DOWN(4, 2) == 4); assert_se(ALIGN_DOWN(SIZE_MAX-1, 2) == SIZE_MAX-1); assert_se(ALIGN_DOWN(SIZE_MAX, 2) == SIZE_MAX-1); assert_se(ALIGN_DOWN(0, 4) == 0); assert_se(ALIGN_DOWN(1, 4) == 0); assert_se(ALIGN_DOWN(2, 4) == 0); assert_se(ALIGN_DOWN(3, 4) == 0); assert_se(ALIGN_DOWN(4, 4) == 4); assert_se(ALIGN_DOWN(SIZE_MAX-1, 4) == SIZE_MAX-3); assert_se(ALIGN_DOWN(SIZE_MAX, 4) == SIZE_MAX-3); assert_se(ALIGN_DOWN_U64(0, 1) == 0); assert_se(ALIGN_DOWN_U64(1, 1) == 1); assert_se(ALIGN_DOWN_U64(2, 1) == 2); assert_se(ALIGN_DOWN_U64(3, 1) == 3); assert_se(ALIGN_DOWN_U64(4, 1) == 4); assert_se(ALIGN_DOWN_U64(UINT64_MAX-1, 1) == UINT64_MAX-1); assert_se(ALIGN_DOWN_U64(UINT64_MAX, 1) == UINT64_MAX); assert_se(ALIGN_DOWN_U64(0, 2) == 0); assert_se(ALIGN_DOWN_U64(1, 2) == 0); assert_se(ALIGN_DOWN_U64(2, 2) == 2); assert_se(ALIGN_DOWN_U64(3, 2) == 2); assert_se(ALIGN_DOWN_U64(4, 2) == 4); assert_se(ALIGN_DOWN_U64(UINT64_MAX-1, 2) == UINT64_MAX-1); assert_se(ALIGN_DOWN_U64(UINT64_MAX, 2) == UINT64_MAX-1); assert_se(ALIGN_DOWN_U64(0, 4) == 0); assert_se(ALIGN_DOWN_U64(1, 4) == 0); assert_se(ALIGN_DOWN_U64(2, 4) == 0); assert_se(ALIGN_DOWN_U64(3, 4) == 0); assert_se(ALIGN_DOWN_U64(4, 4) == 4); assert_se(ALIGN_DOWN_U64(UINT64_MAX-1, 4) == UINT64_MAX-3); assert_se(ALIGN_DOWN_U64(UINT64_MAX, 4) == UINT64_MAX-3); } TEST(align_offset) { assert_se(ALIGN_OFFSET(0, 1) == 0); assert_se(ALIGN_OFFSET(1, 1) == 0); assert_se(ALIGN_OFFSET(2, 1) == 0); assert_se(ALIGN_OFFSET(3, 1) == 0); assert_se(ALIGN_OFFSET(4, 1) == 0); assert_se(ALIGN_OFFSET(SIZE_MAX-1, 1) == 0); assert_se(ALIGN_OFFSET(SIZE_MAX, 1) == 0); assert_se(ALIGN_OFFSET(0, 2) == 0); assert_se(ALIGN_OFFSET(1, 2) == 1); assert_se(ALIGN_OFFSET(2, 2) == 0); assert_se(ALIGN_OFFSET(3, 2) == 1); assert_se(ALIGN_OFFSET(4, 2) == 0); assert_se(ALIGN_OFFSET(SIZE_MAX-1, 2) == 0); assert_se(ALIGN_OFFSET(SIZE_MAX, 2) == 1); assert_se(ALIGN_OFFSET(0, 4) == 0); assert_se(ALIGN_OFFSET(1, 4) == 1); assert_se(ALIGN_OFFSET(2, 4) == 2); assert_se(ALIGN_OFFSET(3, 4) == 3); assert_se(ALIGN_OFFSET(4, 4) == 0); assert_se(ALIGN_OFFSET(SIZE_MAX-1, 4) == 2); assert_se(ALIGN_OFFSET(SIZE_MAX, 4) == 3); assert_se(ALIGN_OFFSET_U64(0, 1) == 0); assert_se(ALIGN_OFFSET_U64(1, 1) == 0); assert_se(ALIGN_OFFSET_U64(2, 1) == 0); assert_se(ALIGN_OFFSET_U64(3, 1) == 0); assert_se(ALIGN_OFFSET_U64(4, 1) == 0); assert_se(ALIGN_OFFSET_U64(UINT64_MAX-1, 1) == 0); assert_se(ALIGN_OFFSET_U64(UINT64_MAX, 1) == 0); assert_se(ALIGN_OFFSET_U64(0, 2) == 0); assert_se(ALIGN_OFFSET_U64(1, 2) == 1); assert_se(ALIGN_OFFSET_U64(2, 2) == 0); assert_se(ALIGN_OFFSET_U64(3, 2) == 1); assert_se(ALIGN_OFFSET_U64(4, 2) == 0); assert_se(ALIGN_OFFSET_U64(UINT64_MAX-1, 2) == 0); assert_se(ALIGN_OFFSET_U64(UINT64_MAX, 2) == 1); assert_se(ALIGN_OFFSET_U64(0, 4) == 0); assert_se(ALIGN_OFFSET_U64(1, 4) == 1); assert_se(ALIGN_OFFSET_U64(2, 4) == 2); assert_se(ALIGN_OFFSET_U64(3, 4) == 3); assert_se(ALIGN_OFFSET_U64(4, 4) == 0); assert_se(ALIGN_OFFSET_U64(UINT64_MAX-1, 4) == 2); assert_se(ALIGN_OFFSET_U64(UINT64_MAX, 4) == 3); } TEST(flags) { enum { F1 = 1 << 0, F2 = 1 << 1, F3 = 1 << 2, F_ALL = F1 | F2 | F3 }; unsigned n, f; assert_se(FLAGS_SET(0, 0)); assert_se(FLAGS_SET(F1, F1)); assert_se(FLAGS_SET(F1 | F2, F1)); assert_se(FLAGS_SET(F1 | F3, F1 | F3)); assert_se(FLAGS_SET(F1 | F2 | F3, F_ALL)); assert_se(!FLAGS_SET(0, F1)); assert_se(!FLAGS_SET(F2, F1)); assert_se(!FLAGS_SET(F1 | F2, F3)); assert_se(!FLAGS_SET(F1 | F2, F1 | F3)); assert_se(!FLAGS_SET(F1 | F2 | F3, ~F_ALL)); /* Check for no double eval. */ n = F2; f = F1; assert_se(!FLAGS_SET(--n, ++f)); assert_se(n == F1); assert_se(f == F2); SET_FLAG(n, F3, true); assert_se(n == (F1 | F3)); SET_FLAG(n, F2, false); assert_se(n == (F1 | F3)); SET_FLAG(n, F3, false); assert_se(n == F1); SET_FLAG(n, F1, true); assert_se(n == F1); SET_FLAG(n, F1 | F3, true); assert_se(n == (F1 | F3)); SET_FLAG(n, F_ALL, false); assert_se(n == 0); assert_se(UPDATE_FLAG(0, 0, true) == 0); assert_se(UPDATE_FLAG(0, F1, true) == F1); assert_se(UPDATE_FLAG(0, F1 | F2, true) == (F1 | F2)); assert_se(UPDATE_FLAG(F1, 0, true) == F1); assert_se(UPDATE_FLAG(F1, F1, true) == F1); assert_se(UPDATE_FLAG(F1, F3, true) == (F1 | F3)); assert_se(UPDATE_FLAG(F1, F1 | F3, true) == (F1 | F3)); assert_se(UPDATE_FLAG(F1, F_ALL, true) == F_ALL); assert_se(UPDATE_FLAG(0, 0, false) == 0); assert_se(UPDATE_FLAG(0, F1, false) == 0); assert_se(UPDATE_FLAG(0, F1 | F2, false) == 0); assert_se(UPDATE_FLAG(F1, 0, false) == F1); assert_se(UPDATE_FLAG(F1, F1, false) == 0); assert_se(UPDATE_FLAG(F1, F3, false) == F1); assert_se(UPDATE_FLAG(F1, F1 | F3, false) == 0); assert_se(UPDATE_FLAG(F1, F2 | F3, false) == F1); assert_se(UPDATE_FLAG(F1, F_ALL, false) == 0); assert_se(UPDATE_FLAG(F_ALL, F_ALL, false) == 0); /* Check for no double eval. */ n = F2; f = F1; assert_se(UPDATE_FLAG(--n, ++f, true) == (F1 | F2)); assert_se(n == F1); assert_se(f == F2); } TEST(DECIMAL_STR_WIDTH) { assert_se(DECIMAL_STR_WIDTH(0) == 1); assert_se(DECIMAL_STR_WIDTH(1) == 1); assert_se(DECIMAL_STR_WIDTH(2) == 1); assert_se(DECIMAL_STR_WIDTH(9) == 1); assert_se(DECIMAL_STR_WIDTH(10) == 2); assert_se(DECIMAL_STR_WIDTH(11) == 2); assert_se(DECIMAL_STR_WIDTH(99) == 2); assert_se(DECIMAL_STR_WIDTH(100) == 3); assert_se(DECIMAL_STR_WIDTH(101) == 3); assert_se(DECIMAL_STR_WIDTH(-1) == 2); assert_se(DECIMAL_STR_WIDTH(-2) == 2); assert_se(DECIMAL_STR_WIDTH(-9) == 2); assert_se(DECIMAL_STR_WIDTH(-10) == 3); assert_se(DECIMAL_STR_WIDTH(-11) == 3); assert_se(DECIMAL_STR_WIDTH(-99) == 3); assert_se(DECIMAL_STR_WIDTH(-100) == 4); assert_se(DECIMAL_STR_WIDTH(-101) == 4); assert_se(DECIMAL_STR_WIDTH(UINT64_MAX) == STRLEN("18446744073709551615")); assert_se(DECIMAL_STR_WIDTH(INT64_MAX) == STRLEN("9223372036854775807")); assert_se(DECIMAL_STR_WIDTH(INT64_MIN) == STRLEN("-9223372036854775808")); } TEST(DECIMAL_STR_MAX) { int8_t s8_longest = INT8_MIN; int16_t s16_longest = INT16_MIN; int32_t s32_longest = INT32_MIN; int64_t s64_longest = INT64_MIN; uint8_t u8_longest = UINT8_MAX; uint16_t u16_longest = UINT16_MAX; uint32_t u32_longest = UINT32_MAX; uint64_t u64_longest = UINT64_MAX; /* NB: Always add +1, because DECIMAL_STR_MAX() includes space for trailing NUL byte, but * DECIMAL_STR_WIDTH() does not! */ assert_se(DECIMAL_STR_MAX(int8_t) == DECIMAL_STR_WIDTH(s8_longest)+1); assert_se(DECIMAL_STR_MAX(int16_t) == DECIMAL_STR_WIDTH(s16_longest)+1); assert_se(DECIMAL_STR_MAX(int32_t) == DECIMAL_STR_WIDTH(s32_longest)+1); assert_se(DECIMAL_STR_MAX(int64_t) == DECIMAL_STR_WIDTH(s64_longest)+1); assert_se(DECIMAL_STR_MAX(uint8_t) == DECIMAL_STR_WIDTH(u8_longest)+1); assert_se(DECIMAL_STR_MAX(uint16_t) == DECIMAL_STR_WIDTH(u16_longest)+1); assert_se(DECIMAL_STR_MAX(uint32_t) == DECIMAL_STR_WIDTH(u32_longest)+1); assert_se(DECIMAL_STR_MAX(uint64_t) == DECIMAL_STR_WIDTH(u64_longest)+1); } TEST(PTR_SUB1) { static const uint64_t x[4] = { 2, 3, 4, 5 }; const uint64_t *p; p = x + ELEMENTSOF(x)-1; assert_se(*p == 5); p = PTR_SUB1(p, x); assert_se(*p == 4); p = PTR_SUB1(p, x); assert_se(*p == 3); p = PTR_SUB1(p, x); assert_se(*p == 2); p = PTR_SUB1(p, x); assert_se(!p); p = PTR_SUB1(p, x); assert_se(!p); } TEST(ISPOWEROF2) { uint64_t u; int64_t i; /* First, test constant expressions */ assert_se(!ISPOWEROF2(-2)); assert_se(!ISPOWEROF2(-1)); assert_se(!ISPOWEROF2(0)); assert_se(ISPOWEROF2(1)); assert_se(ISPOWEROF2(2)); assert_se(!ISPOWEROF2(3)); assert_se(ISPOWEROF2(4)); assert_se(!ISPOWEROF2(5)); assert_se(!ISPOWEROF2(6)); assert_se(!ISPOWEROF2(7)); assert_se(ISPOWEROF2(8)); assert_se(!ISPOWEROF2(9)); assert_se(!ISPOWEROF2(1022)); assert_se(ISPOWEROF2(1024)); assert_se(!ISPOWEROF2(1025)); assert_se(!ISPOWEROF2(UINT64_C(0xffffffff))); assert_se(ISPOWEROF2(UINT64_C(0x100000000))); assert_se(!ISPOWEROF2(UINT64_C(0x100000001))); /* Then, test dynamic expressions, and if they are side-effect free */ i = -2; assert_se(!ISPOWEROF2(i++)); assert_se(i == -1); assert_se(!ISPOWEROF2(i++)); assert_se(i == 0); assert_se(!ISPOWEROF2(i++)); assert_se(i == 1); assert_se(ISPOWEROF2(i++)); assert_se(i == 2); assert_se(ISPOWEROF2(i++)); assert_se(i == 3); assert_se(!ISPOWEROF2(i++)); assert_se(i == 4); assert_se(ISPOWEROF2(i++)); assert_se(i == 5); assert_se(!ISPOWEROF2(i)); u = 0; assert_se(!ISPOWEROF2(u++)); assert_se(u == 1); assert_se(ISPOWEROF2(u++)); assert_se(u == 2); assert_se(ISPOWEROF2(u++)); assert_se(u == 3); assert_se(!ISPOWEROF2(u++)); assert_se(u == 4); assert_se(ISPOWEROF2(u++)); assert_se(u == 5); assert_se(!ISPOWEROF2(u)); } TEST(ALIGNED) { assert_se(IS_ALIGNED16(NULL)); assert_se(IS_ALIGNED32(NULL)); assert_se(IS_ALIGNED64(NULL)); uint64_t u64; uint32_t u32; uint16_t u16; assert_se(IS_ALIGNED16(&u16)); assert_se(IS_ALIGNED16(&u32)); assert_se(IS_ALIGNED16(&u64)); assert_se(IS_ALIGNED32(&u32)); assert_se(IS_ALIGNED32(&u64)); assert_se(IS_ALIGNED64(&u64)); _align_(32) uint8_t ua256; _align_(8) uint8_t ua64; _align_(4) uint8_t ua32; _align_(2) uint8_t ua16; assert_se(IS_ALIGNED16(&ua256)); assert_se(IS_ALIGNED32(&ua256)); assert_se(IS_ALIGNED64(&ua256)); assert_se(IS_ALIGNED16(&ua64)); assert_se(IS_ALIGNED32(&ua64)); assert_se(IS_ALIGNED64(&ua64)); assert_se(IS_ALIGNED16(&ua32)); assert_se(IS_ALIGNED32(&ua32)); assert_se(IS_ALIGNED16(&ua16)); #ifdef __x86_64__ /* Conditionalized on x86-64, since there we know for sure that all three types are aligned to * their size. Too lazy to figure it out for other archs */ void *p = UINT_TO_PTR(1); /* definitely not aligned */ assert_se(!IS_ALIGNED16(p)); assert_se(!IS_ALIGNED32(p)); assert_se(!IS_ALIGNED64(p)); assert_se(IS_ALIGNED16(ALIGN2_PTR(p))); assert_se(IS_ALIGNED32(ALIGN4_PTR(p))); assert_se(IS_ALIGNED64(ALIGN8_PTR(p))); p = UINT_TO_PTR(-1); /* also definitely not aligned */ assert_se(!IS_ALIGNED16(p)); assert_se(!IS_ALIGNED32(p)); assert_se(!IS_ALIGNED64(p)); #endif } TEST(FOREACH_ARRAY) { int a[10] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; int b[10] = { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 }; int x, n; x = n = 0; FOREACH_ARRAY(i, a, 10) { x += *i; n++; } assert_se(x == 45); assert_se(n == 10); x = n = 0; FOREACH_ARRAY(i, a, 10) FOREACH_ARRAY(j, b, 10) { x += (*i) * (*j); n++; } assert_se(x == 45 * 45); assert_se(n == 10 * 10); x = n = 0; FOREACH_ARRAY(i, a, 5) FOREACH_ARRAY(j, b, 5) { x += (*i) * (*j); n++; } assert_se(x == 10 * 35); assert_se(n == 5 * 5); x = n = 0; FOREACH_ARRAY(i, a, 0) FOREACH_ARRAY(j, b, 0) { x += (*i) * (*j); n++; } assert_se(x == 0); assert_se(n == 0); x = n = 0; FOREACH_ARRAY(i, a, -1) FOREACH_ARRAY(j, b, -1) { x += (*i) * (*j); n++; } assert_se(x == 0); assert_se(n == 0); } #define TEST_ROUND_UP_BY_TYPE(type, max_value) \ ({ \ type x, y; \ x = 0, y = 1; \ assert_se(ROUND_UP(x, y) == 0); \ x = 0, y = 2; \ assert_se(ROUND_UP(x, y) == 0); \ x = 0, y = 3; \ assert_se(ROUND_UP(x, y) == 0); \ x = 0, y = 4; \ assert_se(ROUND_UP(x, y) == 0); \ x = 1, y = 1; \ assert_se(ROUND_UP(x, y) == 1); \ x = 1, y = 2; \ assert_se(ROUND_UP(x, y) == 2); \ x = 1, y = 3; \ assert_se(ROUND_UP(x, y) == 3); \ x = 1, y = 4; \ assert_se(ROUND_UP(x, y) == 4); \ x = 2, y = 1; \ assert_se(ROUND_UP(x, y) == 2); \ x = 2, y = 2; \ assert_se(ROUND_UP(x, y) == 2); \ x = 2, y = 3; \ assert_se(ROUND_UP(x, y) == 3); \ x = 2, y = 4; \ assert_se(ROUND_UP(x, y) == 4); \ x = 3, y = 1; \ assert_se(ROUND_UP(x, y) == 3); \ x = 3, y = 2; \ assert_se(ROUND_UP(x, y) == 4); \ x = 3, y = 3; \ assert_se(ROUND_UP(x, y) == 3); \ x = 3, y = 4; \ assert_se(ROUND_UP(x, y) == 4); \ x = 4, y = 1; \ assert_se(ROUND_UP(x, y) == 4); \ x = 4, y = 2; \ assert_se(ROUND_UP(x, y) == 4); \ x = 4, y = 3; \ assert_se(ROUND_UP(x, y) == 6); \ x = 4, y = 4; \ assert_se(ROUND_UP(x, y) == 4); \ x = max_value, y = 1; \ assert_se(ROUND_UP(x, y) == max_value); \ x = max_value, y = 2; \ assert_se(ROUND_UP(x, y) == max_value); \ x = max_value, y = 3; \ assert_se(ROUND_UP(x, y) == max_value); \ x = max_value, y = 4; \ assert_se(ROUND_UP(x, y) == max_value); \ x = max_value-1, y = 1; \ assert_se(ROUND_UP(x, y) == max_value-1); \ x = max_value-1, y = 2; \ assert_se(ROUND_UP(x, y) == max_value-1); \ x = max_value-1, y = 4; \ assert_se(ROUND_UP(x, y) == max_value); \ }) TEST(ROUND_UP) { TEST_ROUND_UP_BY_TYPE(uint8_t, UINT8_MAX); TEST_ROUND_UP_BY_TYPE(uint16_t, UINT16_MAX); TEST_ROUND_UP_BY_TYPE(uint32_t, UINT32_MAX); TEST_ROUND_UP_BY_TYPE(uint64_t, UINT64_MAX); } TEST(u64_multiply_safe) { assert_se(u64_multiply_safe(0, 0) == 0); assert_se(u64_multiply_safe(10, 0) == 0); assert_se(u64_multiply_safe(0, 10) == 0); assert_se(u64_multiply_safe(10, 10) == 100); assert_se(u64_multiply_safe(UINT64_MAX, 0) == 0); assert_se(u64_multiply_safe(UINT64_MAX, 1) == UINT64_MAX); assert_se(u64_multiply_safe(UINT64_MAX, 2) == 0); assert_se(u64_multiply_safe(0, UINT64_MAX) == 0); assert_se(u64_multiply_safe(1, UINT64_MAX) == UINT64_MAX); assert_se(u64_multiply_safe(2, UINT64_MAX) == 0); assert_se(u64_multiply_safe(UINT64_MAX / 2, 0) == 0); assert_se(u64_multiply_safe(UINT64_MAX / 2, 1) == UINT64_MAX / 2); assert_se(u64_multiply_safe(UINT64_MAX / 2, 2) == UINT64_MAX - 1); assert_se(u64_multiply_safe(UINT64_MAX / 2, 3) == 0); assert_se(u64_multiply_safe(0, UINT64_MAX / 2) == 0); assert_se(u64_multiply_safe(1, UINT64_MAX / 2) == UINT64_MAX / 2); assert_se(u64_multiply_safe(2, UINT64_MAX / 2) == UINT64_MAX - 1); assert_se(u64_multiply_safe(3, UINT64_MAX / 2) == 0); assert_se(u64_multiply_safe(UINT64_MAX, UINT64_MAX) == 0); } static void test_once_impl(void) { static unsigned count = 0; if (ONCE) { log_info("This should be logged only once."); count++; } ASSERT_EQ(count, 1u); } TEST(once) { for (unsigned i = 0; i < 20; i++) test_once_impl(); } DEFINE_TEST_MAIN(LOG_INFO);