#include"NumToString.h" 

short NumToString_back(long num, char *cc, short len, char base);
short Reverse(char*);

short NumToString(long num, char *cc, short ccL, char base)
{ /*  Returns length of string if no error
	otherwise returns <= 0  */
ccL=NumToString_back(num,cc,ccL,base);
if(ccL>0) ccL=Reverse(cc);
return (ccL);
}


short NumToString_back(long num, char *cc, short ccL, char base)
{ /*  Returns length of string if no error
	otherwise returns <= 0 **/
	short	len;
	short	sign;
if(num<0) {sign=-1;num=-num;} else sign=1;
len=0;
do {
cc[len]=num%base;
switch(base) {
  case 2:case 3: case 4: case 5: case 6: case 7: case 8: case 9:
  case 10: cc[len]+='0';
  break;
  case 16:
	if(cc[len]<10) cc[len]+='0'; else cc[len]+='A'-10;
  break;
  default:
	printf("Bad Base %i\n", base);
	return(-1);
  break;
	}
len++;
num/=base;
} while(num>0 && len<ccL-2 );
if(len==ccL-2 && num>0) {return 0;}
if(sign<0) cc[len++]='-';
cc[len]=0;
return (len);
}

short Reverse(char *cc)
{ /** Error if string has more than 32000 characters.  */

short	len, i, j, tmp;
len=0; while(cc[len]!=0 && len<32000 ) len++;
if(len>=32000) return -1;
i=0;j=len-1;
while(i<j) {
	tmp=cc[i];
	cc[i]=cc[j];
	cc[j]=tmp;
	i++;j--;
	}
return len;
}