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#include "stdlib.h"
#include "stdbool.h"
#include "string.h"
#include "stddef.h"
static void strreverse( char *s )
{
char *end = s + strlen( s ) - 1;
while( s < end ) {
/* XOR swap; */
*s ^= *end;
*end ^= *s;
*s ^= *end;
s++;
end--;
}
}
char *itoa( int v, char *s, int base )
{
static char digit[] = "0123456789ABCDEF";
bool sign = false;
char *p = s;
if( base < 2 || base > 16 ) {
return NULL;
}
if( v < 0 ) {
v = -v;
sign = true;
}
do {
*p++ = digit[v % base];
} while( ( v /= base ) > 0 );
if( sign ) {
*p++ = '-';
}
*p = '\0';
strreverse( s );
return s;
}
/* TODO: this is the Linux hosted environment */
#define _GNU_SOURCE
#include <unistd.h>
#include <sys/syscall.h>
void exit( int status )
{
syscall( __NR_exit, status );
}
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