OW_Format.cpp

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#include "OW_config.h"
#include "OW_Format.hpp"

namespace OW_NAMESPACE
{

Format::operator String() const
{
   return oss.toString();
}
String Format::toString() const
{
   return oss.toString();
}
const char* Format::c_str() const
{
   return oss.c_str();
}
char Format::process(String& str, char numArgs)
{
   int len(str.length());
   char c(' ');
   bool err = false;
   int i = 0;
   while (i < len && c == ' ' && !err)
   {
      switch (str[i])
      {
         case '%':
            if (i + 1 < len)
            {
               ++i;
               switch (str[i])
               {
                  case '1': case '2': case '3': case '4': case '5': 
                  case '6': case '7': case '8': case '9':
                     c = str[i]; 
                     break;
                  case '%': 
                     oss << str[i]; 
                     break;
                  default: 
                     err = true;
               } // inner switch
            } else err = true; 
            break;
         default: 
            oss << str[i];
            break;
      } // outer switch
      ++i;
   } // for
   if ( i <= len && c > numArgs )
   {
      oss << "\n*** Parameter specifier too large.";
      err = true;
   }
   if (err)
   {
      oss << "\n*** Error in format string at \"" << str.substring(i-1) << "\".\n";
      str.erase();
      return '0';
   }
   str.erase(0, i);
   return c;
} // process
std::ostream&
operator<<(std::ostream& os, const Format& f)
{
   os.write(f.oss.c_str(), f.oss.length());
   return os;
}
void Format::put(const String& t)
{ // t is inserted into oss
   if (!oss.good())
   {
      return;
   }
   oss << t;
}
#define OW_DEFINE_PUT(type) \
void Format::put(type t) \
{ \
\
   if (!oss.good()) \
   { \
      return; \
   } \
\
   oss << t; \
}
OW_DEFINE_PUT(char);
OW_DEFINE_PUT(unsigned char);
OW_DEFINE_PUT(short);
OW_DEFINE_PUT(unsigned short);
OW_DEFINE_PUT(int);
OW_DEFINE_PUT(unsigned int);
OW_DEFINE_PUT(long);
OW_DEFINE_PUT(unsigned long);
OW_DEFINE_PUT(long long);
OW_DEFINE_PUT(unsigned long long);
#undef OW_DEFINE_PUT

Format::Format(const char* ca, const String& a) : oss()
{
   String fmt(ca);
   while (!fmt.empty())
   {
      switch (process(fmt, '1'))
      {
         case '1': put(a); break;
      }
   }
}
Format::Format(const char* ca, const String& a, const String& b) : oss()
{
   String fmt(ca);
   while (!fmt.empty())
   {
      switch (process(fmt, '2'))
      {
         case '1': put(a); break;
         case '2': put(b); break;
      }
   }
}
Format::Format(const char* ca, const String& a, const String& b, const String& c) : oss()
{
   String fmt(ca);
   while (!fmt.empty())
   {
      switch (process(fmt, '3'))
      {
         case '1': put(a); break;
         case '2': put(b); break;
         case '3': put(c); break;
      }
   }
}

} // end namespace OW_NAMESPACE

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