标签： 编码转换

Windows下编码转换


Warning: WP_Syntax::substituteToken(): Argument #1 ($match) must be passed by reference, value given in /www/wwwroot/fawdlstty.com/wp-content/plugins/wp-syntax/wp-syntax.php on line 383

对于网络程序来说经常需要用到编码转换，比如访问utf8编码网页下载之后，转为unicode进行显示。windows自带的编码API比较难用，所以对其进行简单的封装。分SDK和MFC两个版本代码，SDK版本如下

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59

#pragma once
#ifndef __HCODEC_HPP__
#define __HCODEC_HPP__
 
#include <windows .h>
#include <string>
 
class hCodec {
    //不可实例化
    hCodec () = delete;
    ~hCodec () = delete;
 
    static bool hCodec::_conv_Down (std::wstring& _old, std::string& _new, UINT ToType) {
        int lenOld = lstrlenW (_old.c_str ());
        int lenNew = ::WideCharToMultiByte (ToType, 0, _old.c_str (), lenOld, NULL, 0, NULL, NULL);
        std::string s;
        s.resize (lenNew);
        bool bRet = ::WideCharToMultiByte (ToType, 0, _old.c_str (), lenOld, const_cast<char *>(s.c_str ()), lenNew, NULL, NULL);
        _new.clear ();
        _new = s.c_str ();
        return bRet;
    }
    static bool hCodec::_conv_Up (std::string& _old, std::wstring& _new, UINT ToType) {
        int lenOld = lstrlenA (_old.c_str ());
        int lenNew = ::MultiByteToWideChar (ToType, 0, _old.c_str (), lenOld, NULL, 0);
        std::wstring s;
        s.resize (lenNew);
        bool bRet = ::MultiByteToWideChar (ToType, 0, _old.c_str (), lenOld, const_cast<wchar_t *>(s.c_str ()), lenNew);
        _new.clear ();
        _new = s.c_str ();
        return bRet;
    }
 
public:
    static bool hCodec::AnsiToUnicode (std::string& _old, std::wstring& _new) {
        return hCodec::_conv_Up (_old, _new, CP_ACP);
    }
    static bool hCodec::UnicodeToAnsi (std::wstring& _old, std::string& _new) {
        return hCodec::_conv_Down (_old, _new, CP_ACP);
    }
    static bool hCodec::Utf8ToUnicode (std::string& _old, std::wstring& _new) {
        return hCodec::_conv_Up (_old, _new, CP_UTF8);
    }
    static bool hCodec::UnicodeToUtf8 (std::wstring& _old, std::string& _new) {
        return hCodec::_conv_Down (_old, _new, CP_UTF8);
    }
    static bool hCodec::AnsiToUtf8 (std::string& _old, std::string& _new) {
        std::wstring t;
        if (!hCodec::AnsiToUnicode (_old, t)) return false;
        return hCodec::UnicodeToUtf8 (t, _new);
    }
    static bool hCodec::Utf8ToAnsi (std::string& _old, std::string& _new) {
        std::wstring t;
        if (!hCodec::Utf8ToUnicode (_old, t)) return false;
        return hCodec::UnicodeToAnsi (t, _new);
    }
};
 
#endif //__HCODEC_HPP__</wchar_t></char></string></windows>

继续阅读Windows下编码转换