diff options
Diffstat (limited to '')
| -rw-r--r-- | tests/unit/ist.c | 25 | ||||
| -rw-r--r-- | tests/unit/test-int-range.c | 198 |
2 files changed, 223 insertions, 0 deletions
diff --git a/tests/unit/ist.c b/tests/unit/ist.c index 43b3438..e0d2b00 100644 --- a/tests/unit/ist.c +++ b/tests/unit/ist.c @@ -129,6 +129,30 @@ int test_istzero() return 0; } +struct ist f_iststrip(struct ist ist) { return iststrip(ist); } +int test_iststrip() +{ + if (iststrip(ist("foo")).len != 3) + return __LINE__; + + if (iststrip(ist("foo\n")).len != 3) + return __LINE__; + + if (iststrip(ist("foo\r")).len != 3) + return __LINE__; + + if (iststrip(ist("foo\r\n")).len != 3) + return __LINE__; + + if (iststrip(ist("")).len != 0) + return __LINE__; + + if (iststrip(ist("\n")).len != 0) + return __LINE__; + + return 0; +} + int f_istdiff(const struct ist ist1, const struct ist ist2) { return istdiff(ist1, ist2); } int test_istdiff() { @@ -682,6 +706,7 @@ int main(void) printf("%4d istpad()\n", test_istpad()); printf("%4d isttrim()\n", test_isttrim()); printf("%4d istzero()\n", test_istzero()); + printf("%4d iststrip()\n", test_iststrip()); printf("%4d istdiff()\n", test_istdiff()); printf("%4d istmatch()\n", test_istmatch()); printf("%4d istnmatch()\n", test_istnmatch()); diff --git a/tests/unit/test-int-range.c b/tests/unit/test-int-range.c new file mode 100644 index 0000000..f62c51c --- /dev/null +++ b/tests/unit/test-int-range.c @@ -0,0 +1,198 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <inttypes.h> + +/* generic function for 32-bit, 4-bytes at a time */ +static inline __attribute__((always_inline)) +uint32_t is_char4_outside(uint32_t x, uint8_t min8, uint8_t max8) +{ + uint32_t min32 = min8 * 0x01010101U; + uint32_t max32 = max8 * 0x01010101U; + return (((x - min32) | (max32 - x)) & 0x80808080U); +} + +/* generic function for 64-bit, 4-bytes at a time */ +static inline __attribute__((always_inline)) +uint64_t is_char8_outside_by4(uint64_t x, uint8_t min8, uint8_t max8) +{ + return is_char4_outside(x, min8, max8) | is_char4_outside(x >> 32, min8, max8); +} + +/* generic function for 64-bit, 8-bytes at a time */ +static inline __attribute__((always_inline)) +uint64_t is_char8_outside_by8(uint64_t x, uint8_t min8, uint8_t max8) +{ + uint64_t min64 = min8 * 0x0101010101010101ULL; + uint64_t max64 = max8 * 0x0101010101010101ULL; + return (((x - min64) | (max64 - x)) & 0x8080808080808080ULL); +} + +/* generic function for 64-bit, 4- or 8-bytes at a time */ +static inline __attribute__((always_inline)) +uint64_t is_char8_outside(uint64_t x, uint8_t min8, uint8_t max8) +{ + if (sizeof(long) >= 8) + return is_char8_outside_by8(x, min8, max8); + else + return is_char8_outside_by4(x, min8, max8); +} + +/* reference function for 32-bit, one byte at a time */ +static inline int slow32_ref(uint32_t x) +{ + uint8_t a, b, c, d; + + a = x >> 0; b = x >> 8; c = x >> 16; d = x >> 24; + + return a < 0x24 || a > 0x7e || b < 0x24 || b > 0x7e || + c < 0x24 || c > 0x7e || d < 0x24 || d > 0x7e; +} + +/* reference function for 64-bit, one byte at a time */ +static inline int slow64_ref(uint64_t x) +{ + uint8_t a, b, c, d, e, f, g, h; + + a = x >> 0; b = x >> 8; c = x >> 16; d = x >> 24; + e = x >> 32; f = x >> 40; g = x >> 48; h = x >> 56; + + return a < 0x24 || a > 0x7e || b < 0x24 || b > 0x7e || + c < 0x24 || c > 0x7e || d < 0x24 || d > 0x7e || + e < 0x24 || e > 0x7e || f < 0x24 || f > 0x7e || + g < 0x24 || g > 0x7e || h < 0x24 || h > 0x7e; +} + +/* optimal function for 32-bit, 4-bytes at a time */ +static inline int fast32_gen(uint32_t x) +{ + return !!is_char4_outside(x, 0x24, 0x7e); +} + +/* optimal function for 64-bit, 4-bytes at a time */ +static inline int fast64_gen4(uint64_t x) +{ + return !!is_char8_outside_by4(x, 0x24, 0x7e); +} + +/* optimal function for 64-bit, 8-bytes at a time */ +static inline int fast64_gen8(uint64_t x) +{ + return !!is_char8_outside_by8(x, 0x24, 0x7e); +} + +/* optimal function for 64-bit, 4- or 8-bytes at a time */ +static inline int fast64_gen(uint64_t x) +{ + return !!is_char8_outside(x, 0x24, 0x7e); +} + +/* specific function for 32-bit, 4- or 8-bytes at a time */ +static inline int fast32_spec(uint32_t x) +{ + return !!(((x - 0x24242424) | (0x7e7e7e7e - x)) & 0x80808080U); +} + +/* specific function for 32-bit, 4- or 8-bytes at a time */ +static inline int fast64_spec(uint64_t x) +{ + return !!(((x - 0x2424242424242424ULL) | (0x7e7e7e7e7e7e7e7eULL - x)) & 0x8080808080808080ULL); +} + +/* xorshift 64-bit PRNG */ +#define RND64SEED 0x9876543210abcdefull +static uint64_t rnd64seed = RND64SEED; +static inline uint64_t rnd64() +{ + rnd64seed ^= rnd64seed << 13; + rnd64seed ^= rnd64seed >> 7; + rnd64seed ^= rnd64seed << 17; + return rnd64seed; +} + +int main(int argc, char **argv) +{ + uint32_t base = 0; + uint32_t step = 1; + uint32_t loops = 0; + int size = 32; + int ref; + + /* usage: cmd [<bits> [<base> [<step>]]] */ + + if (argc > 1) + size = atoi(argv[1]); + + if (argc > 2) + base = atol(argv[2]); + + if (argc > 3) + step = atol(argv[3]); + + if (size == 32) { + do { + ref = slow32_ref(base); + + if (fast32_gen(base) != ref) { + printf("fast32_gen() fails at 0x%08x: %d / ref=%d\n", base, !ref, ref); + return 1; + } + + if (fast32_spec(base) != ref) { + printf("fast32_spec() fails at 0x%08x: %d / ref=%d\n", base, !ref, ref); + return 1; + } + + base += step; + loops++; + if (!(loops & 0x7ffff)) + printf("0x%08x: 0x%08x\r", loops, base); + } while (base >= step); + } + else if (size == 64) { /* 64-bit on randoms but no more than 2^32 tests */ + uint32_t ctr; + uint64_t rnd; + + /* offset the RNG if using multiple workers */ + for (ctr = 0; ctr < base; ctr++) + rnd64(); + + do { + rnd = rnd64(); + ref = slow64_ref(rnd); + + if (fast64_gen(rnd) != ref) { + printf("fast64_gen() fails at 0x%08x: fct(0x%16llx)=%d / ref=%d\n", base, (long long)rnd, !ref, ref); + return 1; + } + + if (fast64_gen4(rnd) != ref) { + printf("fast64_gen4() fails at 0x%08x: fct(0x%16llx)=%d / ref=%d\n", base, (long long)rnd, !ref, ref); + return 1; + } + + if (fast64_gen8(rnd) != ref) { + printf("fast64_gen8() fails at 0x%08x: fct(0x%16llx)=%d / ref=%d\n", base, (long long)rnd, !ref, ref); + return 1; + } + + if (fast64_spec(rnd) != ref) { + printf("fast64_spec() fails at 0x%08x: fct(0x%16llx)=%d / ref=%d\n", base, (long long)rnd, !ref, ref); + return 1; + } + + base += step; + loops++; + if (!(loops & 0x7ffff)) + printf("0x%08x: 0x%08x -> 0x%16llx\r", loops, base, (long long)rnd); + } while (base >= step); + } + else { + printf("unknown size, usage: %s [<bits> [<base> [<step>]]]\n", argv[0]); + return 1; + } + + printf("%llu checks passed. \n", + (unsigned long long)((uint32_t)(base - step) / step) + 1); + return 0; +} |