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LogOrigin.h
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1 //# LogOrigin.h: The source code location of the originator of a LogMessageLogOrig
2 //# Copyright (C) 1996,1999,2000,2001
3 //# Associated Universities, Inc. Washington DC, USA.
4 //#
5 //# This library is free software; you can redistribute it and/or modify it
6 //# under the terms of the GNU Library General Public License as published by
7 //# the Free Software Foundation; either version 2 of the License, or (at your
8 //# option) any later version.
9 //#
10 //# This library is distributed in the hope that it will be useful, but WITHOUT
11 //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 //# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
13 //# License for more details.
14 //#
15 //# You should have received a copy of the GNU Library General Public License
16 //# along with this library; if not, write to the Free Software Foundation,
17 //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
18 //#
19 //# Correspondence concerning AIPS++ should be addressed as follows:
20 //# Internet email: aips2-request@nrao.edu.
21 //# Postal address: AIPS++ Project Office
22 //# National Radio Astronomy Observatory
23 //# 520 Edgemont Road
24 //# Charlottesville, VA 22903-2475 USA
25 //#
26 //#
27 //# $Id$
28 
29 #ifndef CASA_LOGORIGIN_H
30 #define CASA_LOGORIGIN_H
31 
32 #include <casacore/casa/aips.h>
35 #include <casacore/casa/iosfwd.h>
36 
37 namespace casacore { //# NAMESPACE CASACORE - BEGIN
38 
39 struct SourceLocation;
40 
41 // <summary>
42 // LogOrigin: The source code location of the originator of a LogMessage.
43 // </summary>
44 
45 // <use visibility=export>
46 
47 // <reviewed reviewer="wbrouw" date="1996/08/21" tests="tLogging.cc" demos="dLogging.cc">
48 // </reviewed>
49 
50 // <prerequisite>
51 // <li> <linkto class="ObjectID">ObjectID</linkto> if you are interested in
52 // logging from Distributed Objects (don't worry if you don't know what
53 // that means - in that case ignore it!).
54 // </prerequisite>
55 //
56 // <etymology>
57 // Log[message] Origin[ation point].
58 // </etymology>
59 //
60 // <synopsis>
61 // The <src>LogOriging</src> class is used to record the location at which a
62 // <linkto class="LogMessage">LogMessage</linkto> originates. It consists of:
63 // <ul>
64 // <li> A class name, which is blank in the case of a global function.
65 // <li> A function name - global or member. You should "cut and paste" not only
66 // the function name, but also the arguments (but not the return type) to
67 // ensure that the function name is unique in the face of overloading.
68 // <li> A source file name, usually filled in with the <src>WHERE</src>
69 // predefined macro.
70 // <li> A line number, usually filled in with the <src>__LINE__</src> or
71 // <src>WHERE</src> macros.
72 // <li> An <linkto class="ObjectID">ObjectID</linkto> if the log message comes
73 // from a distributed object (if you don't know what this means,
74 // you don't need to worry about it).
75 // <li> Eventually we may want to canonicalize the path in the filename.
76 // </ul>
77 // </synopsis>
78 //
79 // <example>
80 
81 // </example>
82 // See the examples for <linkto class="LogMessage">LogMessage</linkto> and in
83 // <linkto file="Logging.h">Logging.h</linkto>.
84 //
85 // <motivation>
86 // It can be very useful for debugging if you know where a message is coming
87 // from.
88 // </motivation>
89 //
90 // <todo asof="1996/07/23">
91 // <li> Nothing known
92 // </todo>
93 
94 class LogOrigin
95 {
96 public:
97 
98  // The default constructor sets a null class name, function name, object id,
99  // source file name, and sets the line number to zero.
100  LogOrigin();
101 
102  // Use this constructor if the log message origination is from a
103  // global function. Normally <src>where</src> is provided using
104  // the <src>WHERE</src> macro.
105  LogOrigin(const String &globalFunctionName, const SourceLocation *where = 0);
106 
107  // Use this constructor if the log message origination is from a
108  // class member function. Normally <src>where</src> is provided using
109  // the <src>WHERE</src> macro.
110  LogOrigin(const String &className, const String &memberFuncName,
111  const SourceLocation *where = 0);
112 
113  // Use this constructor if the log message origination is from a
114  // distributed object (don't worry if you don't know what this
115  // means). Normally <src>where</src> is provided using the
116  // <src>WHERE</src> macro.
117  LogOrigin(const String &className, const String &memberFuncName,
118  const ObjectID &id, const SourceLocation *where = 0);
119 
120  // Make <src>this</src> LogOrigin a copy of <src>other</src>.
121  // <group>
122  LogOrigin(const LogOrigin &other);
123  LogOrigin &operator=(const LogOrigin &other);
124  // </group>
125 
126  ~LogOrigin();
127 
128  // Get or set the corresponding element of the source location. Note that
129  // the "set" functions can be strung together:
130  // <srcBlock>
131  // LogOrigin where;
132  // ...
133  // where.function("anotherFunc").line(__LINE__);
134  // </srcBlock>
135  // <group>
136  const String &taskName() const;
137  LogOrigin &taskName(const String &funcName);
138 
139  const String &functionName() const;
140  LogOrigin &functionName(const String &funcName);
141 
142  const String &className() const;
143  LogOrigin &className(const String &className);
144 
145  const ObjectID &objectID() const;
146  LogOrigin &objectID(const ObjectID &id);
147 
148  uInt line() const;
149  LogOrigin &line(uInt which);
150 
151  const String &fileName() const;
152  LogOrigin &fileName(const String &fileName);
153  // </group>
154 
155  // Set the file name and line number at the same time. Normally
156  // <src>where</src> will be defined with the <src>WHERE</src> macro.
157  LogOrigin &sourceLocation(const SourceLocation *where);
158 
159  // Returns <src>class\::function</src> for a member function, or
160  // <src>\::function</src> for a global function.
161  String fullName() const;
162 
163  // Turn the entire origin into a String.
164  String toString() const;
165 
166  // Turns the entire origin except for the ObjectID into a String. The
167  // ObjectID can be turned into a string vie ObjectID::toString.
168  String location() const;
169 
170  // Return true if the line number and file name are not set.
171  Bool isUnset() const;
172 
173 private:
181 
182  // Return a String with the MPI rank
183  String getNode();
184 
185  // Provide common implementation for copy constructor and
186  // assignment operator.
187  void copy_other(const LogOrigin &other);
188 };
189 
190 // <summary>
191 // Write a LogOrigin to an ostream.
192 // </summary>
193 // Write a LogOrigin as a string to an ostream. Merely calls
194 // <src>LogOrigin::toString()</src>
195 // <group name=LogOrigin_ostream>
196 ostream &operator<<(ostream &os, const LogOrigin &origin);
197 // </group>
198 
199 // <summary>
200 // Helper struct to get the source line.
201 // </summary>
202 // The user should only use the <src>WHERE</src> macro.
203 // <group name=SourceLocation>
205 {
206  const char *fileName;
207  Int lineNumber;
208  static const SourceLocation *canonicalize(const char *file, Int line);
209 };
210 
211 #define WHERE casacore::SourceLocation::canonicalize(__FILE__, __LINE__)
212 
213 // </group>
214 
215 
216 } //# NAMESPACE CASACORE - END
217 
218 #endif
Bool isUnset() const
Return true if the line number and file name are not set.
int Int
Definition: aipstype.h:50
String getNode()
Return a String with the MPI rank.
LogOrigin & sourceLocation(const SourceLocation *where)
Set the file name and line number at the same time.
const String & className() const
ObjectID: A unique identifier for distributed and other objects.
Definition: ObjectID.h:79
const String & taskName() const
Get or set the corresponding element of the source location.
String fullName() const
Returns class::function for a member function, or ::function for a global function.
ostream & operator<<(ostream &os, const std::pair< T, U > &p)
String location() const
Turns the entire origin except for the ObjectID into a String.
const ObjectID & objectID() const
uInt line() const
bool Bool
Define the standard types used by Casacore.
Definition: aipstype.h:42
const String & functionName() const
LogOrigin()
The default constructor sets a null class name, function name, object id, source file name...
virtual Origin origin() const =0
ABSTRACT METHODS //.
LogOrigin: The source code location of the originator of a LogMessage.
Definition: LogOrigin.h:94
String toString() const
Turn the entire origin into a String.
String: the storage and methods of handling collections of characters.
Definition: String.h:223
const String & fileName() const
LogOrigin & operator=(const LogOrigin &other)
unsigned int uInt
Definition: aipstype.h:51
void copy_other(const LogOrigin &other)
Provide common implementation for copy constructor and assignment operator.
Defines nreal time structures used by the VLA table filler.
Definition: nreal.h:100
#define casacore
&lt;X11/Intrinsic.h&gt; #defines true, false, casacore::Bool, and String.
Definition: X11Intrinsic.h:42