source/strings/format.cpp

   1 #include "format.h"
   2
   3 using namespace std;
   4
   5 namespace Msp {
   6
   7 Formatter::Formatter(const string &f):
   8         fmt(f),
   9         pos(fmt.begin())
  10 {
  11         advance();
  12 }
  13
  14 const string &Formatter::str() const
  15 {
  16         if(pos!=fmt.end())
  17                 throw format_error("Too few arguments for format");
  18
  19         return result;
  20 }
  21
  22 void Formatter::advance()
  23 {
  24         for(; pos!=fmt.end(); ++pos)
  25         {
  26                 if(*pos=='%')
  27                 {
  28                         ++pos;
  29                         if(pos==fmt.end())
  30                                 throw format_error("Malformed format string");
  31                         if(*pos!='%')
  32                                 break;
  33                 }
  34
  35                 result += *pos;
  36         }
  37 }
  38
  39 Fmt Formatter::get_conversion()
  40 {
  41         if(pos==fmt.end())
  42                 throw format_error("Too many arguments for format");
  43
  44         string::iterator i = pos;
  45         for(; i!=fmt.end(); ++i)
  46                 if(isalpha(*i))
  47                         break;
  48
  49         if(i==fmt.end())
  50                 throw format_error("Malformed format string");
  51
  52         ++i;
  53         string c(pos, i);
  54         pos = i;
  55
  56         return Fmt(c);
  57 }
  58
  59 } // namespace Msp