git.m6w6.name Git - m6w6/libmemcached/blob - libtest/stream.h

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   3  *  Data Differential YATL (i.e. libtest)  library
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  36
  37 #pragma once
  38
  39 #include <iostream>
  40 #include <cassert>
  41 #include <sstream>
  42 #include <ctime>
  43 #include <ostream>
  44
  45 namespace libtest {
  46 namespace stream {
  47
  48 namespace detail {
  49
  50 template<class Ch, class Tr, class A>
  51   class channel {
  52   private:
  53
  54   public:
  55     typedef std::basic_ostringstream<Ch, Tr, A> stream_buffer;
  56
  57   public:
  58     void operator()(const stream_buffer& s, std::ostream& _out,
  59                     const char* filename, int line_number, const char* func)
  60     {
  61       if (filename)
  62       {
  63         _out
  64           << filename
  65           << ":"
  66           << line_number
  67           << ": in "
  68           << func << "() "
  69           << s.str()
  70           << std::endl;
  71       }
  72       else
  73       {
  74         _out
  75           << s.str()
  76           << std::endl;
  77       }
  78     }
  79   };
  80
  81 template<class Ch, class Tr, class A>
  82   class channelln {
  83   private:
  84
  85   public:
  86     typedef std::basic_ostringstream<Ch, Tr, A> stream_buffer;
  87
  88   public:
  89     void operator()(const stream_buffer& s, std::ostream& _out,
  90                     const char* filename, int line_number, const char* func)
  91     {
  92       if (filename)
  93       {
  94         _out
  95           << std::endl
  96           << filename
  97           << ":"
  98           << line_number
  99           << ": in "
 100           << func << "() "
 101           << s.str()
 102           << std::endl;
 103       }
 104       else
 105       {
 106         _out
 107           << std::endl
 108           << s.str()
 109           << std::endl;
 110       }
 111     }
 112   };
 113
 114 template<template <class Ch, class Tr, class A> class OutputPolicy, class Ch = char, class Tr = std::char_traits<Ch>, class A = std::allocator<Ch> >
 115   class log {
 116   private:
 117     typedef OutputPolicy<Ch, Tr, A> output_policy;
 118
 119   private:
 120     std::ostream& _out;
 121     const char *_filename;
 122     int _line_number;
 123     const char *_func;
 124
 125   public:
 126     log(std::ostream& out_arg, const char* filename, int line_number, const char* func) :
 127       _out(out_arg),
 128       _filename(filename),
 129       _line_number(line_number),
 130       _func(func)
 131     { }
 132
 133     ~log()
 134     {
 135       output_policy()(arg, _out, _filename, _line_number, _func);
 136     }
 137
 138   public:
 139     template<class T>
 140       log &operator<<(const T &x)
 141       {
 142         arg << x;
 143         return *this;
 144       }
 145
 146   private:
 147     typename output_policy::stream_buffer arg;
 148   };
 149 } // namespace detail
 150
 151 class make_cerr : public detail::log<detail::channelln> {
 152 public:
 153   make_cerr(const char* filename, int line_number, const char* func) :
 154     detail::log<detail::channelln>(std::cerr, filename, line_number, func)
 155   { }
 156
 157 };
 158
 159 class cerr : public detail::log<detail::channel> {
 160 public:
 161   cerr(const char* filename, int line_number, const char* func) :
 162     detail::log<detail::channel>(std::cout, filename, line_number, func)
 163   { }
 164
 165 };
 166
 167 class clog : public detail::log<detail::channel> {
 168 public:
 169   clog(const char* filename, int line_number, const char* func) :
 170     detail::log<detail::channel>(std::clog, filename, line_number, func)
 171   { }
 172 };
 173
 174 class cout : public detail::log<detail::channel> {
 175 public:
 176   cout(const char* filename, int line_number, const char* func) :
 177     detail::log<detail::channel>(std::cout, filename, line_number, func)
 178   { }
 179 };
 180
 181
 182 } // namespace stream
 183
 184 #define Error stream::cerr(__FILE__, __LINE__, __func__)
 185
 186 #define Out stream::cout(NULL, __LINE__, __func__)
 187
 188 #define Outn() stream::cout(NULL, __LINE__, __func__) << " "
 189
 190 #define Log stream::clog(NULL, __LINE__, __func__)
 191
 192 #define Logn() stream::clog(NULL, __LINE__, __func__) << " "
 193
 194 } // namespace libtest