ref: 433b9cd26eb5d27977eb8cde6bb1c019606e0ffa
dir: /src/libc/stdlib/atoll.c/
#include <ctype.h> #include <stdlib.h> #include "../libc.h" #undef atoll long long atoll(const char *s) { int d, sign = -1; long long n; while (isspace(*s)) ++s; switch (*s) { case '-': sign = 1; case '+': ++s; } /* Compute n as a negative number to avoid overflow on LLONG_MIN */ for (n = 0; (d = _dtoi(*s)) < 10; ++s) n = n*10 - d; return sign * n; }