原文地址：http://cjmxp007.blog.163.com/blog/static/35473837201061541933667/
1
#ifndef TRANSFORM
2 #define TRANSFORM
3 #include < map >
4 using namespace std;
5 // 是否启用map转换，建议启用
6 // 使用map转换的话，同一个常量字符串不会做两次转换
7 #define TEST_TYPE_MAP
8
9 typedef map < const char * , const char *> strmap;
10
11 class CUtf8String
12 {
13 public :
14 inline CUtf8String( const char * gb2312)
15 {
16 m_bIsConst = true ;
17 #ifdef TEST_TYPE_MAP
18 if (m[gb2312])
19 {
20 m_utf8 = m[gb2312];
21 return ;
22 }
23 #endif
24 int buffLen = 0 ;
25 WCHAR wbuff[ 5120 ];
26 MultiByteToWideChar(CP_ACP, 0 , gb2312, - 1 , wbuff, 5120 );
27 buffLen = WideCharToMultiByte(CP_UTF8, 0 , wbuff, - 1 , NULL, 0 , 0 , 0 );
28 m_utf8 = new char [buffLen + 1 ];
29 WideCharToMultiByte(CP_UTF8, 0 , wbuff, - 1 , (LPSTR)m_utf8, buffLen, 0 , 0 );
30 #ifdef TEST_TYPE_MAP
31 m[gb2312] = m_utf8;
32 #endif
33 }
34
35 inline CUtf8String( char * gb2312)
36 {
37 m_bIsConst = false ;
38 int buffLen = 0 ;
39 WCHAR wbuff[ 5120 ];
40 MultiByteToWideChar(CP_ACP, 0 , gb2312, - 1 , wbuff, 5120 );
41 buffLen = WideCharToMultiByte(CP_UTF8, 0 , wbuff, - 1 , NULL, 0 , 0 , 0 );
42 m_utf8 = new char [buffLen + 1 ];
43 WideCharToMultiByte(CP_UTF8, 0 , wbuff, - 1 , (LPSTR)m_utf8, buffLen, 0 , 0 );
44 }
45
46 inline ~ CUtf8String()
47 {
48 #ifndef TEST_TYPE_MAP
49 if (m_utf8)
50 {
51 delete m_utf8;
52 m_utf8 = 0 ;
53 }
54 #else
55 if ( ! m_bIsConst)
56 {
57 if (m_utf8)
58 {
59 delete m_utf8;
60 m_utf8 = 0 ;
61 }
62 }
63 #endif
64 }
65
66 inline operator char * ()
67 {
68 return ( char * )m_utf8;
69 }
70 private :
71 const char * m_utf8;
72 bool m_bIsConst;
73 #ifdef TEST_TYPE_MAP
74 static strmap m;
75 #endif
76 };
77
78 class CGb2312String
79 {
80 public :
81 inline CGb2312String( const char * utf8)
82 {
83 #ifdef TEST_TYPE_MAP
84 if (m[utf8])
85 {
86 m_gb2312 = 0 ;
87 m_gb2312 = m[utf8];
88 }
89 #endif
90 int buffLen = 0 ;
91 WCHAR wbuff[ 5120 ];
92 MultiByteToWideChar(CP_UTF8, 0 , utf8, - 1 , wbuff, 5120 );
93 buffLen = WideCharToMultiByte(CP_ACP, 0 , wbuff, - 1 , NULL, 0 , 0 , 0 );
94 m_gb2312 = new char [buffLen + 1 ];
95 WideCharToMultiByte(CP_ACP, 0 , wbuff, - 1 , (LPSTR)m_gb2312, buffLen, 0 , 0 );
96 #ifdef TEST_TYPE_MAP
97 m[utf8] = m_gb2312;
98 #endif
99 }
100
101 inline CGb2312String( char * utf8)
102 {
103 #ifdef TEST_TYPE_MAP
104 if (m[utf8])
105 {
106 m_gb2312 = 0 ;
107 m_gb2312 = m[utf8];
108 }
109 #endif
110 int buffLen = 0 ;
111 WCHAR wbuff[ 5120 ];
112 MultiByteToWideChar(CP_UTF8, 0 , utf8, - 1 , wbuff, 5120 );
113 buffLen = WideCharToMultiByte(CP_ACP, 0 , wbuff, - 1 , NULL, 0 , 0 , 0 );
114 m_gb2312 = new char [buffLen + 1 ];
115 WideCharToMultiByte(CP_ACP, 0 , wbuff, - 1 , (LPSTR)m_gb2312, buffLen, 0 , 0 );
116 #ifdef TEST_TYPE_MAP
117 m[utf8] = m_gb2312;
118 #endif
119 }
120
121 inline ~ CGb2312String()
122 {
123 #ifndef TEST_TYPE_MAP
124 if (m_gb2312)
125 {
126 delete m_gb2312;
127 m_gb2312 = 0 ;
128 }
129 #endif
130 }
131
132 inline operator char * ()
133 {
134 return ( char * )m_gb2312;
135 }
136 private :
137 const char * m_gb2312;
138 #ifdef TEST_TYPE_MAP
139 static strmap m;
140 #endif
141 };
142
143 #ifdef TEST_TYPE_MAP
144 strmap CUtf8String::m;
145 strmap CGb2312String::m;
146 #endif
147 #endif
148
149
150 // ===================无聊的分割线==========================
151
152 #define U (CUtf8String)
153
154 #define W (CGb2312String)
155
156 // 使用方法
157 int main( int argc, char * argv[])
158 {
159 // 打印出乱码即为UTF8的编码，方便吧。C++还是确实很强悍的
160 printf( " %s " , U " 你好中国! " );
161 }
2 #define TRANSFORM
3 #include < map >
4 using namespace std;
5 // 是否启用map转换，建议启用
6 // 使用map转换的话，同一个常量字符串不会做两次转换
7 #define TEST_TYPE_MAP
8
9 typedef map < const char * , const char *> strmap;
10
11 class CUtf8String
12 {
13 public :
14 inline CUtf8String( const char * gb2312)
15 {
16 m_bIsConst = true ;
17 #ifdef TEST_TYPE_MAP
18 if (m[gb2312])
19 {
20 m_utf8 = m[gb2312];
21 return ;
22 }
23 #endif
24 int buffLen = 0 ;
25 WCHAR wbuff[ 5120 ];
26 MultiByteToWideChar(CP_ACP, 0 , gb2312, - 1 , wbuff, 5120 );
27 buffLen = WideCharToMultiByte(CP_UTF8, 0 , wbuff, - 1 , NULL, 0 , 0 , 0 );
28 m_utf8 = new char [buffLen + 1 ];
29 WideCharToMultiByte(CP_UTF8, 0 , wbuff, - 1 , (LPSTR)m_utf8, buffLen, 0 , 0 );
30 #ifdef TEST_TYPE_MAP
31 m[gb2312] = m_utf8;
32 #endif
33 }
34
35 inline CUtf8String( char * gb2312)
36 {
37 m_bIsConst = false ;
38 int buffLen = 0 ;
39 WCHAR wbuff[ 5120 ];
40 MultiByteToWideChar(CP_ACP, 0 , gb2312, - 1 , wbuff, 5120 );
41 buffLen = WideCharToMultiByte(CP_UTF8, 0 , wbuff, - 1 , NULL, 0 , 0 , 0 );
42 m_utf8 = new char [buffLen + 1 ];
43 WideCharToMultiByte(CP_UTF8, 0 , wbuff, - 1 , (LPSTR)m_utf8, buffLen, 0 , 0 );
44 }
45
46 inline ~ CUtf8String()
47 {
48 #ifndef TEST_TYPE_MAP
49 if (m_utf8)
50 {
51 delete m_utf8;
52 m_utf8 = 0 ;
53 }
54 #else
55 if ( ! m_bIsConst)
56 {
57 if (m_utf8)
58 {
59 delete m_utf8;
60 m_utf8 = 0 ;
61 }
62 }
63 #endif
64 }
65
66 inline operator char * ()
67 {
68 return ( char * )m_utf8;
69 }
70 private :
71 const char * m_utf8;
72 bool m_bIsConst;
73 #ifdef TEST_TYPE_MAP
74 static strmap m;
75 #endif
76 };
77
78 class CGb2312String
79 {
80 public :
81 inline CGb2312String( const char * utf8)
82 {
83 #ifdef TEST_TYPE_MAP
84 if (m[utf8])
85 {
86 m_gb2312 = 0 ;
87 m_gb2312 = m[utf8];
88 }
89 #endif
90 int buffLen = 0 ;
91 WCHAR wbuff[ 5120 ];
92 MultiByteToWideChar(CP_UTF8, 0 , utf8, - 1 , wbuff, 5120 );
93 buffLen = WideCharToMultiByte(CP_ACP, 0 , wbuff, - 1 , NULL, 0 , 0 , 0 );
94 m_gb2312 = new char [buffLen + 1 ];
95 WideCharToMultiByte(CP_ACP, 0 , wbuff, - 1 , (LPSTR)m_gb2312, buffLen, 0 , 0 );
96 #ifdef TEST_TYPE_MAP
97 m[utf8] = m_gb2312;
98 #endif
99 }
100
101 inline CGb2312String( char * utf8)
102 {
103 #ifdef TEST_TYPE_MAP
104 if (m[utf8])
105 {
106 m_gb2312 = 0 ;
107 m_gb2312 = m[utf8];
108 }
109 #endif
110 int buffLen = 0 ;
111 WCHAR wbuff[ 5120 ];
112 MultiByteToWideChar(CP_UTF8, 0 , utf8, - 1 , wbuff, 5120 );
113 buffLen = WideCharToMultiByte(CP_ACP, 0 , wbuff, - 1 , NULL, 0 , 0 , 0 );
114 m_gb2312 = new char [buffLen + 1 ];
115 WideCharToMultiByte(CP_ACP, 0 , wbuff, - 1 , (LPSTR)m_gb2312, buffLen, 0 , 0 );
116 #ifdef TEST_TYPE_MAP
117 m[utf8] = m_gb2312;
118 #endif
119 }
120
121 inline ~ CGb2312String()
122 {
123 #ifndef TEST_TYPE_MAP
124 if (m_gb2312)
125 {
126 delete m_gb2312;
127 m_gb2312 = 0 ;
128 }
129 #endif
130 }
131
132 inline operator char * ()
133 {
134 return ( char * )m_gb2312;
135 }
136 private :
137 const char * m_gb2312;
138 #ifdef TEST_TYPE_MAP
139 static strmap m;
140 #endif
141 };
142
143 #ifdef TEST_TYPE_MAP
144 strmap CUtf8String::m;
145 strmap CGb2312String::m;
146 #endif
147 #endif
148
149
150 // ===================无聊的分割线==========================
151
152 #define U (CUtf8String)
153
154 #define W (CGb2312String)
155
156 // 使用方法
157 int main( int argc, char * argv[])
158 {
159 // 打印出乱码即为UTF8的编码，方便吧。C++还是确实很强悍的
160 printf( " %s " , U " 你好中国! " );
161 }