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debug.h

00001 // 00002 // The Worldforge Project 00003 // Copyright (C) 1998,1999 The Worldforge Project 00004 // 00005 // This program is free software; you can redistribute it and/or modify 00006 // it under the terms of the GNU Lesser General Public License as 00007 // published by the Free Software Foundation; either version 2.1 of the 00008 // License, or (at your option) any later version. 00009 // 00010 // This program is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 // GNU General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU General Public License 00016 // along with this program; if not, write to the Free Software 00017 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, SA. 00018 // 00019 // For information about Worldforge and its authors, please contact 00020 // the Worldforge Web Site at http://www.worldforge.org. 00021 // 00022 00023 // Originally written by Karsten Laux 00024 // C++ and streaming modifications by Ron Steinke 00025 00026 #ifndef _WFTK_DEBUG_H_ 00027 #define _WFTK_DEBUG_H_ 00028 00029 #ifdef DEBUG 00030 #include <iostream> 00031 #endif 00032 00033 namespace wftk { 00034 00046 class Debug { 00047 public: 00048 00050 00055 enum { 00056 INVALIDATE = 1 << 16, 00057 GENERIC = 1 << 17, 00058 DRAWING = 1 << 18, 00059 MAINLOOP = 1 << 19, 00060 STARTUP = 1 << 20, // and shutdown 00061 SOUND = 1 << 21, 00062 EVENTS = 1 << 22, 00063 WIDGET_CREATE = 1 << 23, // and destroy 00064 TEXT_WIDGETS = 1 << 24, 00065 FONTS = 1 << 25, 00066 PACKING = 1 << 26, 00067 OPENGL = 1 << 27, 00068 DRAW_TIMING = 1 << 28, 00069 APP_MASK = 0xffff, 00070 LIB_MASK = 0xffff0000 00071 }; 00072 00074 typedef unsigned long Mask; 00075 00077 static void init(Mask mask) 00078 { 00079 #ifdef DEBUG 00080 if(mask) 00081 std::cerr<<"debugging enabled.("<<mask<<")"<<std::endl; 00082 else if(mask_) 00083 std::cerr<<"debugging disabled."<<std::endl; 00084 mask_ = mask; 00085 out.valid_ = (mask != 0); 00086 #endif 00087 } 00088 00090 static void addChannels(Mask mask) 00091 { 00092 #ifdef DEBUG 00093 if(mask) 00094 out.valid_ = true; 00095 mask_ |= mask; 00096 #endif 00097 } 00098 00100 static void removeChannels(Mask mask) 00101 { 00102 #ifdef DEBUG 00103 mask_ &= ~mask; 00104 if(!mask_) 00105 out.valid_ = false; 00106 #endif 00107 } 00108 00110 Debug() : valid_(mask_ != 0) {} 00112 Debug(Mask mask) : valid_((mask_ & mask) != 0) {} 00113 00115 static Debug out; 00117 static Debug& channel(Mask mask) {return (mask_ & mask) ? out : dummy_;} 00118 00120 template<class C> 00121 Debug& operator<<(const C& c) 00122 { 00123 #ifdef DEBUG 00124 if(valid_) 00125 std::cerr << c; 00126 #endif // DEBUG 00127 return *this; 00128 } 00129 00131 operator bool() const 00132 { 00133 #ifdef DEBUG 00134 return valid_; 00135 #else 00136 // we could return valid_ here too, but it wouldn't optimise as well 00137 return false; 00138 #endif 00139 } 00140 00142 class Endl 00143 { 00144 // don't need this if DEBUG isn't defined, since 00145 // 'out << endl;' doesn't write to std::cerr in that case 00146 #ifdef DEBUG 00147 inline friend std::ostream& operator<<(std::ostream& os, const Endl& e) 00148 { 00149 os << std::endl; 00150 return os; 00151 } 00152 #endif 00153 }; 00154 00156 static Endl endl; 00157 00159 class Flush 00160 { 00161 // don't need this if DEBUG isn't defined, since 00162 // 'out << flush;' doesn't write to std::cerr in that case 00163 #ifdef DEBUG 00164 inline friend std::ostream& operator<<(std::ostream& os, const Flush& e) 00165 { 00166 os << std::flush; 00167 return os; 00168 } 00169 #endif 00170 }; 00171 00173 static Flush flush; 00174 00175 private: 00176 bool valid_; 00177 static Mask mask_; 00178 static Debug dummy_; 00179 }; 00180 00181 } // namespace 00182 00183 #endif // _DEBUG_H_

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