shithub: scc

ref: ba7282c77fe93ec17c42d1a3a11fbd4109d93616
dir: /src/libc/stdlib/atoi.c/

View raw version 
#include <ctype.h>
#include <stdlib.h>

#include "../libc.h"

#undef atoi

int
atoi(const char *s)
{
	int n, d, sign = -1;

	while (isspace(*s))
		++s;

	switch (*s) {
	case '-':
		sign = 1;
	case '+':
		++s;
	}

	/* Compute n as a negative number to avoid overflow on INT_MIN */
	for (n = 0; (d = _dtoi(*s)) < 10; ++s)
		n = n*10 - d;

	return sign * n;
}