[2015] | 1 | /* ========================================================================
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| 2 | * (C) 2000 Vienna University of Technology
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| 3 | * ========================================================================
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| 4 | * PROJECT: Urban Viz
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| 5 | * ========================================================================*/
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| 6 | /** several error checking/log facilities.
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| 7 | *
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| 8 | * for char-strings, 'String' is typedef'd for convenience
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| 9 | * This library can be used standalone, with old style iostreams
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| 10 | * (define \c OLDSTREAM for that) or new style iostreams
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| 11 | *
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| 12 | * $Header: /usr/local/cvsyare/cvsyamp/include/merror.h,v 1.3 2003/01/06 19:01:32 wimmer Exp $
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| 13 | * @author Michael Wimmer
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| 14 | * @file */
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| 15 | /* ========================================================================*/
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| 16 |
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| 17 | #ifndef NO_PRAGMA_ONCE
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| 18 | #pragma once
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| 19 | #endif
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| 20 |
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| 21 | #ifndef MERROR_H
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| 22 | #define MERROR_H
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| 23 |
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| 24 |
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| 25 | // this library can be used with new and old style iostreams
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| 26 | #ifndef OLDSTREAM
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| 27 | # include <iostream>
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| 28 | # define ERRSTD std
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| 29 | #else
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| 30 | # include <iostream.h>
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| 31 | # define ERRSTD
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| 32 | #endif
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| 33 |
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| 34 |
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| 35 | // ---------------------------------------------------------------------------
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| 36 | // General macros
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| 37 | // ---------------------------------------------------------------------------
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| 38 |
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| 39 | /// always use this to delete an object
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| 40 | #define DELPTR(ptr) do { if (ptr) { delete (ptr); (ptr) = NULL; } } while (0)
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| 41 | /// always use this to delete an array of objects
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| 42 | #define DELAPTR(ptr) do { if (ptr) { delete [] (ptr); (ptr) = NULL; } } while (0)
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| 43 |
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| 44 |
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| 45 | // ---------------------------------------------------------------------------
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| 46 | // Log file initialization
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| 47 | // ---------------------------------------------------------------------------
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| 48 |
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| 49 | // gets global logfile, used by OUT/ASSERT/etc macros, to allow
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| 50 | // logstream to be used in global constructors
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| 51 | ERRSTD::ostream &_GetLogStream();
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| 52 | // enables use of curses or other things
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| 53 | ERRSTD::ostream &_LogStreamDone(ERRSTD::ostream &os,
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| 54 | bool overrideconsole = false);
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| 55 |
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| 56 | /** an application can declare a function of this type to redirect
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| 57 | console output. */
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| 58 | typedef void (*LogStreamToConsoleFunc)(const char *consoleoutput);
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| 59 |
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| 60 | /// Set a handler to redirect console output
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| 61 | void SetConsoleStreamHandler(LogStreamToConsoleFunc handler);
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| 62 |
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| 63 | /// enables/disables logging to logfile (for performance reasons)
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| 64 | void SetLogToFile(bool yesno);
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| 65 |
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| 66 |
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| 67 | /** initializes the logfile for \c OUT/ASSERT etc macros - call once at
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| 68 | beginning if you desire file output
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| 69 | (for logtofile=false output goes to \c cerr initially) */
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| 70 | void InitLogStream(const char *filename = "error.log", bool logtofileonly = true);
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| 71 |
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| 72 | /// if true, logs to logfile, otherwise logs to console (\c cerr)
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| 73 | bool SetLogStream(bool logtofileonly);
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| 74 |
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| 75 |
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| 76 | // ---------------------------------------------------------------------------
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| 77 | // Log file definitions and macros
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| 78 | // ---------------------------------------------------------------------------
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| 79 |
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| 80 |
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| 81 | /** @name Logfile output macros
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| 82 | Any of those will write a string to the console and, if desired,
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| 83 | to the logfile.
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| 84 | They differ in the amount of tabs they prepend.
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| 85 | Note: all macros (except OUT0) PREPEND a carriage return!
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| 86 | */
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| 87 | //@{
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| 88 |
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| 89 |
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| 90 | /// stream a variable; example: \c OUT1(SV(refcount)) gives ' refcount = 5 '
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| 91 | #define SV(x) " " #x "=" << (x) << " "
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| 92 |
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| 93 | /// stream a string; example: \c OUT1(SS(filename)) gives ' filename = "abc" '
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| 94 | #define SS(x) "\"" << x << "\""
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| 95 |
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| 96 | // ------- logfile output macros
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| 97 |
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| 98 | /** stream to logfile.
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| 99 | (NOTE: don't insert \c endl here! use OUT1 for that - this is if you DON'T
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| 100 | want linebreaks!) */
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| 101 | #define OUT0(__xx) _LogStreamDone(_GetLogStream() << __xx)
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| 102 | /// stream to logfile (use if you want linebreaks!) - for normal use
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| 103 | #define OUT1(__xx) OUT0("\n" << __xx)
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| 104 | /// like \c OUT1, but with a TAB in front
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| 105 | #define OUT2(__xx) OUT1("\t" << __xx)
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| 106 | /// prepends 2 TABs
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| 107 | #define OUT3(__xx) OUT1("\t\t" << __xx)
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| 108 | /// prepends i TABs
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| 109 | #define OUTI(__ii,__xx) { _GetLogStream() << "\n"; \
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| 110 | for (int __jj = 0; __jj < __ii; __jj ++) \
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| 111 | _GetLogStream() << "\t"; \
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| 112 | _LogStreamDone(_GetLogStream() << __xx); }
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| 113 |
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| 114 | #define HERE " ("__FILE__", " << __LINE__ << ") ("__DATE__")"
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| 115 |
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| 116 | // internal macro to allow forced console output
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| 117 | #define _CONOUT(__xx) _LogStreamDone(_GetLogStream() << "\n" << __xx,true)
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| 118 |
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| 119 | /// error message with file, line and date information
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| 120 | #define EOUT(__xx) _CONOUT("ERROR: " << __xx << HERE)
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| 121 | /// warning message with file, line and date information
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| 122 | #define WOUT(__xx) _CONOUT("\tWARNING: " << __xx << HERE)
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| 123 |
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| 124 | //@}
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| 125 |
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| 126 | /* ---------------------------------------------------------------------------
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| 127 | Assertion macros: test the parameter result (if (!result) and take
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| 128 | approprate action if failed:
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| 129 |
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| 130 | ASM_xxx 2nd parameter specifies an error message for the logfile
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| 131 | ASS_xxx no error message
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| 132 | xxx if failed, just print error message
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| 133 | xxx_RETVAL if failed, the 3rd macro parameter is returned
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| 134 | xxx_RET return is called (for void functions)
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| 135 | xxx_ELSE if failed, output the error message, else execute following
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| 136 | statement
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| 137 | _ASM_TEMPLATE is used for creating the other macros.
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| 138 | -------------------------------------------------------------------------*/
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| 139 |
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| 140 | // used by ASM_*
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| 141 | #define _BLOCK do
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| 142 | #define _BLBEGIN _BLOCK {
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| 143 | #define _BLEND } while (0)
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| 144 | #define _NOP 4==4
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| 145 |
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| 146 | #ifndef RELEASE_BUILD
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| 147 | #define _ASM_TEMPLATE(result, errstr, stmt) \
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| 148 | _BLBEGIN if(!(result)) { EOUT(errstr); stmt; } _BLEND
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| 149 |
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| 150 | #define _ASS_TEMPLATE(result, stmt) \
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| 151 | _BLBEGIN if(!(result)) { stmt; } _BLEND
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| 152 |
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| 153 | #define _CHKM_TEMPLATE(result, errstr, stmt) \
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| 154 | _BLBEGIN if(!(result)) { EOUT(errstr); stmt; } _BLEND
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| 155 |
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| 156 | #define _CHKMS_TEMPLATE(result, stmt) \
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| 157 | _BLBEGIN if((result)==NULL) \
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| 158 | { DWORD errorValue = GetLastError(); EOUTMS( SV(errorValue) << \
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| 159 | GetErrorStringMS(errorValue)); stmt; } _BLEND
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| 160 |
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| 161 | #else
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| 162 | #define _ASM_TEMPLATE(result, errstr, stmt) _BLBEGIN _NOP; _BLEND
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| 163 | #define _ASS_TEMPLATE(result, stmt) _BLBEGIN _NOP; _BLEND
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| 164 | #define _CHKM_TEMPLATE(result, errstr, stmt) \
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| 165 | _BLBEGIN if (!(result)) { stmt }; _BLEND
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| 166 | #define _CHKMS_TEMPLATE(result, stmt) _CHKM_TEMPLATE(result, "", stmt)
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| 167 | #endif
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| 168 |
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| 169 | // ---------------------------------------------------------------------------
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| 170 | // ASSERT macros - code will NOT be executed in release builds
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| 171 | // ---------------------------------------------------------------------------
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| 172 |
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| 173 | /** @name Assertion and error checking macros
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| 174 | Use for ALL error checking in your code.
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| 175 | They are useful to check a return code, print a message
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| 176 | and take appropriate action.
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| 177 | Generally, ASM_* macros are for code consistency checks,
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| 178 | whereas CHK_* macros should be used for errors that could
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| 179 | occur also in the final program (like file not found etc.).
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| 180 | */
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| 181 | //@{
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| 182 |
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| 183 | /** logs error message, returns \c value if \c result==NULL
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| 184 | (all ASM_* map to a NOOP in Release builds - use CHKM_*
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| 185 | if the code needs to get executed!!!) */
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| 186 | #define ASM_RETVAL(result, errstr, value) \
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| 187 | _ASM_TEMPLATE(result, errstr, return (value))
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| 188 |
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| 189 | /// \c ASM_RETVAL for void-functions
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| 190 | #define ASM_RET(result, errstr) _ASM_TEMPLATE(result, errstr, return)
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| 191 |
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| 192 | /// like \c ASM_RETVAL, but does an \c exit(-1)
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| 193 | // NOTE: this should NOT have a CHKM-version, as this would result
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| 194 | // in a bad exit behaviour!
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| 195 | #define ASM_EXIT(result, errstr) _ASM_TEMPLATE(result, errstr, exit(-1))
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| 196 |
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| 197 | // ---------------------------------------------------------------------------
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| 198 | // CHECK macros - code WILL be executed in release builds
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| 199 | // ---------------------------------------------------------------------------
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| 200 |
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| 201 | /// \c ASM_RETVAL for code that needs to be executed also in release-builds
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| 202 | #define CHKM_RETVAL(result, errstr, value) \
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| 203 | _CHKM_TEMPLATE(result, errstr, return (value))
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| 204 | ///
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| 205 | #define CHKM_RET(result, errstr) _CHKM_TEMPLATE(result, errstr, return)
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| 206 |
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| 207 |
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| 208 | // ---------------------------------------------------------------------------
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| 209 | // Macros not used much
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| 210 | // ---------------------------------------------------------------------------
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| 211 |
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| 212 |
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| 213 | /// like \c ASM_RETVAL but without logging anything
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| 214 | #define ASS_RETVAL(result, value) _ASS_TEMPLATE(result, return (value))
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| 215 | /// like \c ASM_RET but without logging anything
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| 216 | #define ASS_RET(result, errstr) _ASS_TEMPLATE(result, return)
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| 217 |
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| 218 | #ifndef RELEASE_BUILD
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| 219 |
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| 220 | /// log error msg if result==NULL, no further action
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| 221 | #define ASM(result, errstr) _BLBEGIN if(!(result)) { EOUT(errstr); } _BLEND
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| 222 |
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| 223 | /** \c if(!result) and logs error msg. Example:
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| 224 | \code ASM_IF(res, "failed!") { do_cleanup; } else { do_good_code; }
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| 225 | \endcode */
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| 226 | #define ASM_IF(result, errstr) if((!(result)) ? (EOUT(errstr),true) : false)
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| 227 |
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| 228 | /** only the \c else -path of \c ASM_IF. Example:
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| 229 | \code ASM_ELSE(res, "bad input") { do_good_code; } \endcode */
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| 230 | #define ASM_ELSE(result, errstr) if (!(result)) { EOUT(errstr); } else
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| 231 |
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| 232 | /// \c ASM_IF that also evaluates \c result in release-builds
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| 233 | #define CHKM_IF(result, errstr) ASM_IF(result, errstr)
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| 234 |
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| 235 | /// see \c CHKM_IF
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| 236 | #define CHKM_ELSE(result, errstr) ASM_ELSE(result, errstr)
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| 237 |
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| 238 | /** special: if result is false, output the offending statement
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| 239 | (saves you the trouble of inventing error strings!) */
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| 240 | #define ASSERTSELF(result) _BLBEGIN if(!(result)) { EOUT(#result); } _BLEND
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| 241 |
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| 242 | /** for some Win32 API calls (those where the result contains errorcode):
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| 243 | print error msg if statement fails */
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| 244 | #define CHKMS_FORMAT(result) \
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| 245 | _BLBEGIN int hResult = (result); if((hResult) != NULL) \
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| 246 | { EOUT( GetAPIErrorString(hResult) + #result ); } _BLEND
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| 247 |
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| 248 | /// outputs any OpenGL error accumulated so far
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| 249 | #define CHKGL _BLBEGIN GLenum error; \
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| 250 | if ( (error = glGetError()) != GL_NO_ERROR) \
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[2539] | 251 | EOUT("gl error " << gluErrorString(error)); _BLEND;
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[2015] | 252 |
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| 253 | #ifdef WIN32
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| 254 | #include <malloc.h>
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| 255 | /// checks the heap for consistency (useful for errors seemingly in stl!)
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| 256 | #define CHKHEAP _BLBEGIN int hpres; if ( (hpres = _heapchk()) != _HEAPOK ) \
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| 257 | EOUT("Heap error: " << hpres); _BLEND;
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| 258 | #else
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| 259 | #define CHKHEAP
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| 260 | #endif
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| 261 |
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| 262 |
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| 263 | #ifndef DBG_LVL
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| 264 | /** override this define in C++-settings to change
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| 265 | behaviour of \c DBG and \c REL */
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| 266 | #define DBG_LVL 1
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| 267 | #endif
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| 268 |
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| 269 | #else
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| 270 |
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| 271 | #define ASM(result, errstr) _ASM_TEMPLATE(result, errstr, _NOP)
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| 272 |
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| 273 | #define ASSERTSELF(result) _BLBEGIN _NOP; _BLEND
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| 274 | #define CHKMS_FORMAT(result) _BLBEGIN (result); _BLEND
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| 275 |
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| 276 | #define ASM_IF(result, errstr) if(false)
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| 277 | #define ASM_ELSE(result, errstr) if (false) _NOP; else
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| 278 | #define CHKM_IF(result, errstr) if(!(result))
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| 279 | #define CHKM_ELSE(result, errstr) if(result)
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| 280 | #define CHKGL
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| 281 | #define CHKHEAP
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| 282 |
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| 283 | #ifndef DBG_LVL
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| 284 | #define DBG_LVL 0
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| 285 | #endif
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| 286 |
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| 287 | #endif
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| 288 |
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| 289 | #if DBG_LVL > 0
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| 290 | /** the following statement/block is only executed in debug-builds
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| 291 | (\c DBG_LVL = 1) */
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| 292 | #define DDBG if(true)
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| 293 | /** the following statement/block is only executed in release-builds
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| 294 | (\c DBG_LVL = 0) */
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| 295 | #define RREL if(false)
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| 296 | #else
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| 297 | #define DDBG if(false)
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| 298 | #define RREL if(true)
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| 299 | #endif
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| 300 |
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| 301 | //@}
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| 302 |
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| 303 | // ---------------------------------------------------------------------------
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| 304 | // Microsoft Win32 API errors
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| 305 | // ---------------------------------------------------------------------------
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| 306 |
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| 307 | /** @name Win32 only
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| 308 | These macros should be used for Win32 API-calls
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| 309 | */
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| 310 | //@{
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| 311 |
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| 312 | /// put a messagebox to screen - WIN32 only
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| 313 | void Msg(const char *message, const char *title = NULL);
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| 314 |
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| 315 | /// gets WIN32 API error message (used by CHKMS-macros)
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| 316 | extern char *GetErrorStringMS(unsigned long errorValue);
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| 317 |
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| 318 | #define EOUTMS(x) _CONOUT("\nERRMS: " << x << HERE)
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| 319 | #define WOUTMS(x) _CONOUT("\nWARNMS: " << x << HERE)
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| 320 |
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| 321 | /// for Win32 API calls: prints error message if statement fails
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| 322 | #define CHKMS(result) _CHKMS_TEMPLATE(result, _NOP)
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| 323 | /** for Win32 API calls: prints error message and returns value
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| 324 | if statement fails */
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| 325 | #define CHKMS_RETVAL(result, value) _CHKMS_TEMPLATE(result, return (value))
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| 326 | /// for Win32 API calls: prints error message and returns if statement fails
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| 327 | #define CHKMS_RET(result) _CHKMS_TEMPLATE(result, return)
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| 328 |
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| 329 | //@}
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| 330 |
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| 331 | // C4127: conditional expression is constant (because of merror)
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| 332 | // C4514 unreferenced inline function has been removed (also in stl.h)
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| 333 | #ifdef WIN32
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| 334 | #pragma warning(disable: 4127 4514)
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| 335 | #endif
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| 336 |
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| 337 | #undef ERRSTD
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| 338 |
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| 339 | #endif // MERROR_H
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