/**
	
 * Ansi C "itoa" based on Kernighan & Ritchie's "Ansi C"
	
 * with slight modification to optimize for specific architecture:
	
 */
	
void strreverse(char* begin, char* end) {
	
	char aux;
	
	while(end>begin)
	
		aux=*end, *end--=*begin, *begin++=aux;
	
}
	
void itoa(int value, char* str, int base) {
	
	static char num[] = "0123456789abcdefghijklmnopqrstuvwxyz";
	
	char* wstr=str;
	
	int sign;
	
	div_t res;
	

	
	// Validate base
	
	if (base<2 || base>35){ *wstr='\0'; return; }
	

	
	// Take care of sign
	
	if ((sign=value) < 0) value = -value;
	

	
	// Conversion. Number is reversed.
	
	do {
	
		res = div(value,base);
	
		*wstr++ = num[res.rem];
	
	}while(value=res.quot);
	
	if(sign<0) *wstr++='-';
	
	*wstr='\0';
	

	
	// Reverse string
	
	strreverse(str,wstr-1);
	
}