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1 // Copyright 2004-2009 Google Inc. | |
2 // | |
3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 // you may not use this file except in compliance with the License. | |
5 // You may obtain a copy of the License at | |
6 // | |
7 // http://www.apache.org/licenses/LICENSE-2.0 | |
8 // | |
9 // Unless required by applicable law or agreed to in writing, software | |
10 // distributed under the License is distributed on an "AS IS" BASIS, | |
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 // See the License for the specific language governing permissions and | |
13 // limitations under the License. | |
14 // ======================================================================== | |
15 // | |
16 // atlconvfix.h | |
17 // | |
18 // This file is included in the precompile headers. | |
19 // Do not include the base/basictypes.h here. | |
20 | |
21 #ifndef OMAHA_COMMON_ATLCONVFIX_H_ | |
22 #define OMAHA_COMMON_ATLCONVFIX_H_ | |
23 | |
24 #ifndef DISALLOW_EVIL_CONSTRUCTORS | |
25 // A macro to disallow the evil copy constructor and operator= functions | |
26 // This should be used in the private: declarations for a class | |
27 #define DISALLOW_EVIL_CONSTRUCTORS(TypeName) \ | |
28 TypeName(const TypeName&); \ | |
29 void operator=(const TypeName&) | |
30 #endif | |
31 | |
32 // These use alloca which can be dangerous, | |
33 // so we don't allow them to be used. Use | |
34 // CA2[C]W, etc. instead. | |
35 #undef A2W | |
36 #undef W2A | |
37 #undef A2W_EX | |
38 #undef W2A_EX | |
39 #undef USES_CONVERSION | |
40 | |
41 #ifdef DEBUG | |
42 // The DestroyBuffer template and the macros following it are | |
43 // all there to ensure that when the string classes get destroyed, | |
44 // so does the string that they return since it is no longer valid. | |
45 // Without them it is very easy to make simple and hard to catch mistakes | |
46 // when using the atl C*2[C]* string converstion classes. | |
47 | |
48 // In non-debug code, the atl string macros do not need to be destroyed, | |
49 // so they aren't wrapped there. | |
50 | |
51 template <int buffer_length, template <int buffer_length> class ConversionClass, | |
52 typename StringType> | |
53 class DestroyBuffer : public ConversionClass<buffer_length> { | |
54 public: | |
55 DestroyBuffer(StringType string) : ConversionClass<buffer_length>(string) { | |
56 } | |
57 | |
58 DestroyBuffer(StringType string, UINT code_page) : | |
59 ConversionClass<buffer_length>(string, code_page) { | |
60 } | |
61 | |
62 ~DestroyBuffer() { | |
63 memset(m_szBuffer, 0xdd, sizeof(m_szBuffer)); | |
64 } | |
65 | |
66 private: | |
67 DISALLOW_EVIL_CONSTRUCTORS(DestroyBuffer); | |
68 }; | |
69 | |
70 #define DECLARED_DESTROY_NAME(base_type) DestroyBuffer##base_type | |
71 #define DECLARE_DESTROY_TYPES(base_type, string_type) \ | |
72 template <int buffer_length = 128> \ | |
73 class DECLARED_DESTROY_NAME(base_type##EX) : \ | |
74 public DestroyBuffer<buffer_length, base_type##EX, string_type> { \ | |
75 public: \ | |
76 DECLARED_DESTROY_NAME(base_type##EX)(string_type string) : \ | |
77 DestroyBuffer<buffer_length, base_type##EX, string_type>(string) { \ | |
78 } \ | |
79 DECLARED_DESTROY_NAME(base_type##EX)(string_type string, \ | |
80 UINT code_page) : \ | |
81 DestroyBuffer<buffer_length, base_type##EX, string_type>(string, \ | |
82 code_page) { \ | |
83 } \ | |
84 private: \ | |
85 DISALLOW_EVIL_CONSTRUCTORS(DECLARED_DESTROY_NAME(base_type##EX)); \ | |
86 }; \ | |
87 typedef DECLARED_DESTROY_NAME(base_type##EX)<> \ | |
88 DECLARED_DESTROY_NAME(base_type) | |
89 | |
90 DECLARE_DESTROY_TYPES(CW2W, LPCWSTR); | |
91 DECLARE_DESTROY_TYPES(CW2A, LPCWSTR); | |
92 DECLARE_DESTROY_TYPES(CA2W, LPCSTR); | |
93 DECLARE_DESTROY_TYPES(CA2A, LPCSTR); | |
94 | |
95 #define CW2WEX DECLARED_DESTROY_NAME(CW2WEX) | |
96 #define CW2AEX DECLARED_DESTROY_NAME(CW2AEX) | |
97 #define CA2WEX DECLARED_DESTROY_NAME(CA2WEX) | |
98 #define CA2AEX DECLARED_DESTROY_NAME(CA2AEX) | |
99 #define CW2W DECLARED_DESTROY_NAME(CW2W) | |
100 #define CW2A DECLARED_DESTROY_NAME(CW2A) | |
101 #define CA2W DECLARED_DESTROY_NAME(CA2W) | |
102 #define CA2A DECLARED_DESTROY_NAME(CA2A) | |
103 #endif // DEBUG | |
104 | |
105 #endif // OMAHA_COMMON_ATLCONVFIX_H_ | |
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