source: GTP/trunk/Lib/Vis/Preprocessing/src/Timer/merror.cpp @ 2015

Revision 2015, 7.7 KB checked in by bittner, 18 years ago (diff)

pvs efficiency tuning

  • Property svn:executable set to *
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1 /* ========================================================================
2  * (C) 2000 Vienna University of Technology
3  * ========================================================================
4  * PROJECT: Urban Viz
5  * ========================================================================*/
6/** several error checking/log facilities.
7  *
8  * for char-strings, 'String' is typedef'd for convenience
9  * This library can be used with old style iostreams
10  * (define \c OLDSTREAM for that)
11  *
12  * $Header: /usr/local/cvsyare/cvsyamp/src/yareutils/merror.cpp,v 1.1 2002/11/14 15:22:58 wimmer Exp $
13  * @author      Michael Wimmer
14  * @file                                                                   */
15 /* ========================================================================*/
16
17#include "merror.h"
18
19// The following is to allow this to be compiled with new and old style
20// iostreams. Special care has to be taken because in ms iostreams,
21// strstream has a different name and behaves differently!
22#ifndef OLDSTREAM
23# include <fstream>
24# include <strstream>
25# define ERRSTD std
26#else
27# include <fstream.h>
28# if defined(_MSC_VER) && !defined(__SGI_STL)
29#  define MS_STRSTREAM
30#  include <strstrea.h>
31# else
32#  include <strstream.h>
33# endif
34# define ERRSTD
35#endif
36
37
38
39
40// ---------------------------------------------------------------------------
41//  PrivateErrHandler class definition
42// ---------------------------------------------------------------------------
43
44
45// a few functions encapsulated in a class so initialization is easier
46class PrivateErrHandler
47{
48public:
49        /// constructor
50        PrivateErrHandler();
51       
52        /// will be forwarded to outside macros
53        inline ERRSTD::ostream &GetCurrentLogStream();
54
55        /// output the current logstream
56        inline void PrintLogStream(bool overrideconsole);
57
58        /// init the logstream (especially the logfile)
59        void InitLogStream(const char *filename, bool _logtoconsole);
60
61        /// who handles the console stream
62        void SetConsoleStreamHandler(LogStreamToConsoleFunc handler);
63
64        /// console only on/off
65        bool SetLogStream(bool _logtoconsole);
66
67        /// whether to log to file or not
68        void SetLogToFile(bool yesno);
69
70private:
71        // the logfile
72        ERRSTD::ofstream log_ofstream;
73
74        // the logstring (i.e., the primary logging target)
75        ERRSTD::strstream log_ostrstream;
76
77        // log only to console?
78        bool logtoconsole;
79
80        // log to file also?
81        bool logtofile;
82
83        LogStreamToConsoleFunc CurrentLogStreamToConsoleFunc;
84
85        /// just goes to cout
86        inline static void DefaultLogStreamToConsoleFunc(
87                const char *consolestring);
88
89        // shoudn't be used
90        PrivateErrHandler(const PrivateErrHandler &) {}
91        PrivateErrHandler &operator=(const PrivateErrHandler &) { return *this; }
92};
93
94// ---------------------------------------------------------------------------
95//  PrivateErrHandler class implementation
96// ---------------------------------------------------------------------------
97
98
99PrivateErrHandler::PrivateErrHandler()
100        :CurrentLogStreamToConsoleFunc(DefaultLogStreamToConsoleFunc),
101         logtoconsole(false), logtofile(true)
102{
103}
104
105
106void PrivateErrHandler::SetLogToFile(bool yesno)
107{
108        logtofile = yesno;
109}
110
111
112inline ERRSTD::ostream &PrivateErrHandler::GetCurrentLogStream()
113{
114        return log_ostrstream;
115}
116
117inline void PrivateErrHandler::PrintLogStream(bool overrideconsole)
118{
119        // Note: this is only used with the old strstream, not with ostringstream
120        log_ostrstream << ERRSTD::ends;
121
122        if (log_ofstream && (logtofile || !logtoconsole))
123                log_ofstream << log_ostrstream.str() << ERRSTD::flush;
124
125        if (logtoconsole || overrideconsole || !log_ofstream)
126                CurrentLogStreamToConsoleFunc(log_ostrstream.str());
127       
128        // Note: this was used with ostringstream, but not compatible
129        // with old iostreams
130        //log_ostringstream.str("");
131       
132        log_ostrstream.rdbuf()->freeze(false);
133        log_ostrstream.seekp(0);
134}
135
136
137void PrivateErrHandler::InitLogStream(const char *filename,
138                                                                          bool _logtoconsole)
139{
140        // Note: only works on new iostreams!
141#ifdef MS_STRSTREAM
142        log_ofstream.rdbuf()->setbuf(NULL, 0);
143#else
144        log_ofstream.rdbuf()->pubsetbuf(NULL, 0);
145#endif
146               
147        // SGI bug: ios::in assumed!
148        log_ofstream.open(filename,ERRSTD::ios::out|ERRSTD::ios::trunc);
149       
150        if (!log_ofstream)
151        {
152                EOUT("Could not open logfile!");
153        }
154
155        SetLogStream(_logtoconsole);
156
157        OUT0("Logfile opened\n");
158}
159
160void PrivateErrHandler::SetConsoleStreamHandler(
161                                                        LogStreamToConsoleFunc handler)
162{
163        if (handler == NULL)
164                CurrentLogStreamToConsoleFunc = DefaultLogStreamToConsoleFunc;
165        else
166                CurrentLogStreamToConsoleFunc = handler;
167}
168
169bool PrivateErrHandler::SetLogStream(bool _logtoconsole)
170{
171        bool x = logtoconsole;
172        logtoconsole = _logtoconsole;
173        return x;
174}
175
176void PrivateErrHandler::DefaultLogStreamToConsoleFunc(
177                                                                const char *consolestring)
178{
179        ERRSTD::cout << consolestring;
180}
181
182
183// ---------------------------------------------------------------------------
184//  Private C-access functions
185// ---------------------------------------------------------------------------
186
187static PrivateErrHandler *theErrHandler = NULL;
188
189inline static void _ErrInitDefault()
190{
191        static bool initialized = false;
192        if (!initialized)
193        {
194                theErrHandler = new PrivateErrHandler;
195                initialized = true;
196        }
197}
198
199// ---------------------------------------------------------------------------
200//  Public interface - exposed to macros
201// ---------------------------------------------------------------------------
202
203// logstream used by macros - this is necessary so that logstreams don't
204// give an error if used in global constructors (which are constructed
205// prior to the logfile)
206ERRSTD::ostream &_GetLogStream()
207{
208        _ErrInitDefault();
209       
210        return theErrHandler->GetCurrentLogStream();
211}
212
213ERRSTD::ostream &_LogStreamDone(ERRSTD::ostream &os, bool overrideconsole)
214{
215        _ErrInitDefault();
216        theErrHandler->PrintLogStream(overrideconsole);
217
218        return os;
219}
220
221
222// ---------------------------------------------------------------------------
223//  Public interface - exposed directly to application
224// ---------------------------------------------------------------------------
225
226void SetConsoleStreamHandler(LogStreamToConsoleFunc handler)
227{
228        _ErrInitDefault();
229
230        theErrHandler->SetConsoleStreamHandler(handler);
231}
232
233void InitLogStream(const char *filename, bool logtofile)
234{
235        _ErrInitDefault();
236       
237        theErrHandler->InitLogStream(filename, !logtofile);
238}
239
240bool SetLogStream(bool logtofile)
241{
242        _ErrInitDefault();
243
244        return !theErrHandler->SetLogStream(!logtofile);
245}
246
247void SetLogToFile(bool yesno)
248{
249        _ErrInitDefault();
250
251        theErrHandler->SetLogToFile(yesno);
252}
253
254
255// ---------------------------------------------------------------------------
256//  Win32-stuff
257// ---------------------------------------------------------------------------
258
259#ifdef WIN32
260
261#define WIN32_LEAN_AND_MEAN
262#define NOMINMAX
263#include <windows.h>    // for MessageBox and stuff
264
265void Msg(const char *msg, const char *title)
266{
267  //    MessageBox(NULL, msg, title, MB_OK);
268}
269
270/// gets WIN32 API error message (used by CHKMS-macros)
271char *GetErrorStringMS(DWORD errorValue)
272{
273        LPVOID lpMsgBuf;
274
275        FormatMessage(
276                FORMAT_MESSAGE_ALLOCATE_BUFFER |
277                FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_MAX_WIDTH_MASK,
278                NULL,
279                errorValue,
280                MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
281                (LPTSTR) &lpMsgBuf,
282                0,
283                NULL
284        );
285
286        //String message;
287        char *message;
288        if (lpMsgBuf)
289        {
290                message = (char *)lpMsgBuf;
291
292                // Free the buffer.
293                LocalFree( lpMsgBuf );
294        }
295        else
296        {
297                message = "No error message returned";
298        }
299
300        return message;
301}
302
303#else
304// nop functions for non-Win32 systems
305void Msg(const char *msg, const char *title) {}
306char *GetErrorStringMS(unsigned long errorValue) { return ""; }
307#endif
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