1 // Copyright Contributors to the OpenVDB Project
2 // SPDX-License-Identifier: MPL-2.0
3 
4 #ifndef OPENVDB_EXCEPTIONS_HAS_BEEN_INCLUDED
5 #define OPENVDB_EXCEPTIONS_HAS_BEEN_INCLUDED
6 
7 #include <openvdb/version.h>
8 #include <exception>
9 #include <sstream>
10 #include <string>
11 
12 
13 namespace openvdb {
14 OPENVDB_USE_VERSION_NAMESPACE
15 namespace OPENVDB_VERSION_NAME {
16 
17 class OPENVDB_API Exception: public std::exception
18 {
19 public:
20     Exception(const Exception&) = default;
21     Exception(Exception&&) = default;
22     Exception& operator=(const Exception&) = default;
23     Exception& operator=(Exception&&) = default;
24     ~Exception() override = default;
25 
what()26     const char* what() const noexcept override
27     {
28         try { return mMessage.c_str(); } catch (...) {}
29         return nullptr;
30     }
31 
32 protected:
Exception()33     Exception() noexcept {}
34     explicit Exception(const char* eType, const std::string* const msg = nullptr) noexcept
35     {
36         try {
37             if (eType) mMessage = eType;
38             if (msg) mMessage += ": " + (*msg);
catch(...)39         } catch (...) {}
40     }
41 
42 private:
43     std::string mMessage;
44 };
45 
46 
47 #define OPENVDB_EXCEPTION(_classname) \
48 class OPENVDB_API _classname: public Exception \
49 { \
50 public: \
51     _classname() noexcept: Exception( #_classname ) {} \
52     explicit _classname(const std::string& msg) noexcept: Exception( #_classname , &msg) {} \
53 }
54 
55 
56 OPENVDB_EXCEPTION(ArithmeticError);
57 OPENVDB_EXCEPTION(IndexError);
58 OPENVDB_EXCEPTION(IoError);
59 OPENVDB_EXCEPTION(KeyError);
60 OPENVDB_EXCEPTION(LookupError);
61 OPENVDB_EXCEPTION(NotImplementedError);
62 OPENVDB_EXCEPTION(ReferenceError);
63 OPENVDB_EXCEPTION(RuntimeError);
64 OPENVDB_EXCEPTION(TypeError);
65 OPENVDB_EXCEPTION(ValueError);
66 
67 #undef OPENVDB_EXCEPTION
68 
69 
70 } // namespace OPENVDB_VERSION_NAME
71 } // namespace openvdb
72 
73 
74 #define OPENVDB_THROW(exception, message) \
75 { \
76     std::string _openvdb_throw_msg; \
77     try { \
78         std::ostringstream _openvdb_throw_os; \
79         _openvdb_throw_os << message; \
80         _openvdb_throw_msg = _openvdb_throw_os.str(); \
81     } catch (...) {} \
82     throw exception(_openvdb_throw_msg); \
83 } // OPENVDB_THROW
84 
85 #endif // OPENVDB_EXCEPTIONS_HAS_BEEN_INCLUDED
86