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#include <stdlib.h>
#include <errno.h>
#include <stdint.h>
#include <limits.h>
int
strtou16_strict(const char *str, uint16_t *result)
{
char *end;
long val;
if (!str)
return -EINVAL;
errno = 0;
val = strtol(str, &end, 10);
if (errno == ERANGE && (val == LONG_MAX || val == LONG_MIN))
return -EINVAL;
if (errno != 0 && val == 0)
return -EINVAL;
if (end == str)
return -EINVAL;
if (*end != '\0')
return -EINVAL;
if (val < 1 || val > UINT16_MAX)
return -EINVAL;
if (result)
*result = val;
return 0;
}
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