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Diffstat (limited to '')
| -rw-r--r-- | strtoi32.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/strtoi32.c b/strtoi32.c new file mode 100644 index 0000000..4a768e8 --- /dev/null +++ b/strtoi32.c @@ -0,0 +1,54 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" +#ifndef TEST + +#define RET_MAX 2147483647LL +#define RET_MIN (-RET_MAX - 1LL) + + +int_least32_t +libsimple_strtoi32(const char *restrict nptr, char **restrict end, int base) +{ + intmax_t r = strtoimax(nptr, end, base); + if (r < RET_MIN) { + r = RET_MIN; + errno = ERANGE; + } else if (r > RET_MAX) { + r = RET_MAX; + errno = ERANGE; + } + return (int_least32_t)r; +} + + +#else +#include "test.h" + +int +main(void) +{ + char *e; + errno = 0; + assert(strtoi32("0x7FFFFFFF", NULL, 0) == INT32_C(0x7FFFFFFF) && !errno); + assert(strtoi32("0x7FFFFFFF", NULL, 16) == INT32_C(0x7FFFFFFF) && !errno); + assert(strtoi32("7FFFFFFF", NULL, 16) == INT32_C(0x7FFFFFFF) && !errno); + assert(strtoi32("0x7FFFFFFF", NULL, 10) == 0 && !errno); + assert(strtoi32("0x7FFFFFFF", &e, 0) == INT32_C(0x7FFFFFFF) && !*e && !errno); + assert(strtoi32("0x7FFFFFFF ", &e, 16) == INT32_C(0x7FFFFFFF) && *e == ' ' && !errno); + assert(strtoi32("0x7FFFFFFF", &e, 10) == 0 && *e == 'x' && !errno); + assert(strtoi32("2147483647", &e, 10) == INT32_C(0x7FFFFFFF) && !*e && !errno); + assert(strtoi32("-2147483647", &e, 10) == INT32_C(-2147483647) && !*e && !errno); + assert(strtoi32("-2147483648", &e, 10) == INT32_C(-2147483648) && !*e && !errno); + assert(strtoi32("1234", &e, 10) == 1234 && !*e && !errno); + assert(strtoi32("1234", &e, 8) == 01234 && !*e && !errno); + assert(strtoi32("01234", &e, 0) == 01234 && !*e && !errno); + assert(strtoi32("2147483648", &e, 10) == INT32_C(2147483647) && !*e && errno == ERANGE); + errno = 0; + assert(strtoi32("-2147483649", &e, 10) == INT32_C(-2147483648) && !*e && errno == ERANGE); + errno = 0; + assert(!strtoi32("1", &e, -10000) && errno == EINVAL); + errno = 0; + return 0; +} + +#endif |