1 #ifndef LIB2GEOM_EXCEPTION_HEADER
2 #define LIB2GEOM_EXCEPTION_HEADER
4 /**
5 * \file
6 * \brief Defines the different types of exceptions that 2geom can throw.
7 *
8 * Copyright 2007 Johan Engelen <goejendaagh@zonnet.nl>
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it either under the terms of the GNU Lesser General Public
12 * License version 2.1 as published by the Free Software Foundation
13 * (the "LGPL") or, at your option, under the terms of the Mozilla
14 * Public License Version 1.1 (the "MPL"). If you do not alter this
15 * notice, a recipient may use your version of this file under either
16 * the MPL or the LGPL.
17 *
18 * You should have received a copy of the LGPL along with this library
19 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * You should have received a copy of the MPL along with this library
22 * in the file COPYING-MPL-1.1
23 *
24 * The contents of this file are subject to the Mozilla Public License
25 * Version 1.1 (the "License"); you may not use this file except in
26 * compliance with the License. You may obtain a copy of the License at
27 * http://www.mozilla.org/MPL/
28 *
29 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
30 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
31 * the specific language governing rights and limitations.
32 *
33 */
35 #include <exception>
36 #include <sstream>
37 #include <string>
39 namespace Geom {
41 // Base exception class, all 2geom exceptions should be derived from this one.
42 class Exception : public std::exception {
43 public:
44 Exception(const char * message, const char *file, const int line) {
45 std::ostringstream os;
46 os << "lib2geom exception: " << message << " (" << file << ":" << line << ")";
47 msgstr = os.str();
48 }
50 virtual ~Exception() throw() {} // necessary to destroy the string object!!!
52 virtual const char* what() const throw () {
53 return msgstr.c_str();
54 }
55 protected:
56 std::string msgstr;
57 };
58 #define THROW_EXCEPTION(message) throw(Geom::Exception(message, __FILE__, __LINE__))
60 //-----------------------------------------------------------------------
61 // Two main exception classes: LogicalError and RangeError.
62 // Logical errors are 2geom faults/bugs, RangeErrors are 'user' faults.
63 // This way, the 'user' can distinguish between groups of exceptions
64 // ('user' is the coder that uses lib2geom)
65 class LogicalError : public Exception {
66 public:
67 LogicalError(const char * message, const char *file, const int line)
68 : Exception(message, file, line) {}
69 };
70 #define THROW_LOGICALERROR(message) throw(LogicalError(message, __FILE__, __LINE__))
72 class RangeError : public Exception {
73 public:
74 RangeError(const char * message, const char *file, const int line)
75 : Exception(message, file, line) {}
76 };
77 #define THROW_RANGEERROR(message) throw(RangeError(message, __FILE__, __LINE__))
79 //-----------------------------------------------------------------------
80 // Special case exceptions. Best used with the defines :)
82 class NotImplemented : public LogicalError {
83 public:
84 NotImplemented(const char *file, const int line)
85 : LogicalError("Method not implemented", file, line) {}
86 };
87 #define THROW_NOTIMPLEMENTED(i) throw(NotImplemented(__FILE__, __LINE__))
89 class InvariantsViolation : public LogicalError {
90 public:
91 InvariantsViolation(const char *file, const int line)
92 : LogicalError("Invariants violation", file, line) {}
93 };
94 #define THROW_INVARIANTSVIOLATION(i) throw(InvariantsViolation(__FILE__, __LINE__))
95 #define ASSERT_INVARIANTS(e) ((e) ? (void)0 : THROW_INVARIANTSVIOLATION())
97 class NotInvertible : public RangeError {
98 public:
99 NotInvertible(const char *file, const int line)
100 : RangeError("Function does not have a unique inverse", file, line) {}
101 };
102 #define THROW_NOTINVERTIBLE(i) throw(NotInvertible(__FILE__, __LINE__))
104 class InfiniteSolutions : public RangeError {
105 public:
106 InfiniteSolutions(const char *file, const int line)
107 : RangeError("There are infinite solutions", file, line) {}
108 };
109 #define THROW_INFINITESOLUTIONS(i) throw(InfiniteSolutions(__FILE__, __LINE__))
111 class ContinuityError : public RangeError {
112 public:
113 ContinuityError(const char *file, const int line)
114 : RangeError("Non-contiguous path", file, line) {}
115 };
116 #define THROW_CONTINUITYERROR(i) throw(ContinuityError(__FILE__, __LINE__))
118 struct SVGPathParseError : public std::exception {
119 char const *what() const throw() { return "parse error"; }
120 };
123 } // namespace Geom
125 #endif
128 /*
129 Local Variables:
130 mode:c++
131 c-file-style:"stroustrup"
132 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
133 indent-tabs-mode:nil
134 fill-column:99
135 End:
136 */
137 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :