debug.h

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/* Copyright (C) 2013
   Oliver Lemke <olemke@core-dump.info>
 
   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 2, or (at your option) any
   later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
   USA. */
 
#ifndef debug_h
#define debug_h
 
#ifndef NDEBUG
 
#include <iostream>
 
// Use this macro around function parameter names and variable definitions
// which are only used in assertions
#define DEBUG_ONLY(...) __VA_ARGS__
 
// Use this macro to output a counter value everytime a
// certain place is reached
#define DEBUG_COUNTER(n)                                    \
  {                                                         \
    static Index n = 0;                                     \
    std::cerr << "DBG: " << #n << ": " << ++n << std::endl; \
  }
 
// Print value of expression for debugging
#define DEBUG_PRINT(e) \
  { std::cerr << "DBG: " << (e) << std::endl; }
 
// Print expression and value for debugging
#define DEBUG_VAR(e) \
  { std::cerr << "DBG: " << #e << ": " << (e) << std::endl; }
 
// Print expression and value with the given fp precision for debugging
#define DEBUG_VAR_FLT(p, e)                                           \
  {                                                                   \
    std::streamsize old_p = std::cerr.precision();                    \
    std::cerr << "DBG: " << #e << ": " << std::setprecision(p) << (e) \
              << std::endl                                            \
              << std::setprecision(old_p);                            \
  }
 
#else
 
#define DEBUG_ONLY(...)
 
#define DEBUG_COUNTER(n)
 
#define DEBUG_PRINT(e)
 
#define DEBUG_VAR(e)
 
#define DEBUG_VAR_FLT(p, e)
 
#endif /* NDEBUG */
 
#endif /* debug_h */