CVS: msp430-libc/src/stdlib itoa.c,NONE,1.1

Update of /cvsroot/mspgcc/msp430-libc/src/stdlib
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv10864/src/stdlib

Added Files:
	itoa.c 
Log Message:
Added char *itoa(int number, char *str, int radix); function to stdlib.



--- NEW FILE: itoa.c ---
/*******************************************************
* Code contributed by Chris Takahashi,                 *
* ctakahashi (at) users (dot) sourceforge (dot) net.   *
* See stdlib.h for licence.                            *
* $Date: 2004/07/02 19:09:31 $                                             *
*******************************************************/
#include <stdlib.h>

char *itoa(int num, char *str, int radix) {
	char sign = 0;
	char temp[17];	//an int can only be 16 bits long
					//at radix 2 (binary) the string
					//is at most 16 + 1 null long.
	int temp_loc = 0;
	int digit;
	int str_loc = 0;

	//save sign for radix 10 conversion
	if (radix == 10 && num < 0) {
		sign = 1;
		num = -num;
	}
	
	//construct a backward string of the number.
	while ((unsigned int)num > 0) {
		digit = (unsigned int)num % radix;
		if (digit < 10) 
			temp[temp_loc++] = digit + '0';
		else
			temp[temp_loc++] = digit - 10 + 'A';
		((unsigned int)num) /= radix;
	}

	//now add the sign for radix 10
	if (radix == 10 && sign) {
		temp[temp_loc] = '-';
	} else {
		temp_loc--;
	}


	//now reverse the string.
	while ( temp_loc >=0 ) {// while there are still chars
		str[str_loc++] = temp[temp_loc--];	
	}
	str[str_loc] = 0; // add null termination.

	return str;
}



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