CPPUtil/UtilPrettyPrinting.cpp

   1 //
   2 //  UtilPrettyPrinting.cpp
   3 //  CPPUtil
   4 //
   5 //  Created by James McIlree on 9/8/13.
   6 //  Copyright (c) 2013 Apple. All rights reserved.
   7 //
   8
   9 #include "CPPUtil.h"
  10
  11 BEGIN_UTIL_NAMESPACE
  12
  13 std::string formated_byte_size(uint64_t bytes) {
  14         if (bytes) {
  15                 char tmp[128];
  16                 const char *si_prefix[] = { "B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };
  17                 const int base = 1024;
  18                 int c = std::min((int)(log((double)bytes)/log((double)base)), (int)sizeof(si_prefix) - 1);
  19                 snprintf(tmp, sizeof(tmp), "%1.2f %s", bytes / pow((double)base, c), si_prefix[c]);
  20                 return std::string(tmp);
  21         }
  22
  23         return std::string("0.00 B");
  24 }
  25
  26 END_UTIL_NAMESPACE