// //  CCRadix.m //  CCFC // //  Created by xichen on 11-12-16. //  Copyright 2011年 __MyCompanyName__. All rights reserved. // #include "CCRadix.h" @implementation CCRadix + (NSString *)get2RadixStr:(unsigned)n {
   return [self getRadixStr:n withRadix:2]; } + (NSString *)get8RadixStr:(unsigned)n {
   return [self getRadixStr:n withRadix:8]; } + (NSString *)get10RadixStr:(unsigned)n {
   return [self getRadixStr:n withRadix:10]; } + (NSString *)get16RadixStr:(unsigned)n {
       NSMutableString *ret = [NSMutableString string]; while (n)         {
   int temp = n % 16; if(temp >= 10)                         temp = 'A' + temp - 10; if(temp < 10)                         [ret insertString:[NSString stringWithFormat:@"%d", temp]                       atIndex:0]; else                         [ret insertString:[NSString stringWithFormat:@"%c", temp]                                           atIndex:0];                 n /= 16;         } return ret; } // you should make sure the radix argument is less or equal to 10. + (NSString *)getRadixStr:(unsigned)n withRadix:(SMALL_INT)radix {
       NSMutableString *ret = [NSMutableString string]; while (n)         {
   int temp = n % radix;                 [ret insertString:[NSString stringWithFormat:@"%d", temp]                                   atIndex:0];                 n /= radix;         } return ret; } + (unsigned)getValueFromStr:(NSString *)str withRadix:(SMALL_INT)radix {
   int len = [str length]; if(len == 0) return  0;     unsigned sum = 0; for(int i = len - 1; i >= 0; --i)     {
           sum += ([str characterAtIndex:i] - '0') * pow(radix, len - i - 1);     } return sum; } // you should make sure the srcStr with srcRadix is valid and not overflow to UINT_MAX. + (NSString *)getRadixStr:(NSString *)srcStr                  srcRadix:(SMALL_INT)srcRadix                 destRadix:(SMALL_INT)destRadix {
       unsigned n = [self getValueFromStr:srcStr withRadix:srcRadix]; return [self getRadixStr:n withRadix:destRadix]; } @end

 

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