source: asp3_tinet_ecnl_arm/trunk/musl-1.1.18/src/stdlib/atoll.c@ 352

#include <stdlib.h>
#include <ctype.h>

long long atoll(const char *s)
{
        long long n=0;
        int neg=0;
        while (isspace(*s)) s++;
        switch (*s) {
        case '-': neg=1;
        case '+': s++;
        }
        /* Compute n as a negative number to avoid overflow on LLONG_MIN */
        while (isdigit(*s))
                n = 10*n - (*s++ - '0');
        return neg ? n : -n;
}