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#include <u.h>
#include <libc.h>
long
atol(char *s)
{
long n;
int f, c;
n = 0;
f = 0;
while(*s == ' ' || *s == '\t')
s++;
if(*s == '-' || *s == '+') {
if(*s++ == '-')
f = 1;
while(*s == ' ' || *s == '\t')
s++;
}
if(s[0]=='0' && s[1]) {
if(s[1]=='x' || s[1]=='X'){
s += 2;
for(;;) {
c = *s;
if(c >= '0' && c <= '9')
n = n*16 + c - '0';
else
if(c >= 'a' && c <= 'f')
n = n*16 + c - 'a' + 10;
else
if(c >= 'A' && c <= 'F')
n = n*16 + c - 'A' + 10;
else
break;
s++;
}
} else
while(*s >= '0' && *s <= '7')
n = n*8 + *s++ - '0';
} else
while(*s >= '0' && *s <= '9')
n = n*10 + *s++ - '0';
if(f)
n = -n;
return n;
}
int
atoi(char *s)
{
return atol(s);
}
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