ansi utf8 unicode 三者之间相互转换

转载地址：https://www.jianshu.com/p/1d54f59f8785
 1 #include <iostream>
 2 #include <string>
 3 #include <fstream>
 4 
 5 using std::string;
 6 using namespace std;
 7 
 8 wchar_t* AnsiToUnicode(char *sAnsi) 
 9 {
10 
11     //ansi to unicode
12     int sLen = MultiByteToWideChar(CP_ACP, NULL, sAnsi, -1, NULL, 0); 
13     wchar_t* sUnicode = new wchar_t[sLen];
14     //wchar_t* sUnicode = (wchar_t*)malloc(sLen*sizeof(wchar_t));
15     MultiByteToWideChar(CP_ACP, NULL, sAnsi, -1, sUnicode, sLen);
16 
17 
18     return sUnicode;
19     //delete[] sUnicode; 
20     //sUnicode =NULL; 
21     //free(sUnicode);
22 }
23 
24 char *UnicodeToUtf8(wchar_t *sUnicode)
25 {
26     int sLen = WideCharToMultiByte(CP_UTF8, NULL, sUnicode, -1, NULL, 0, NULL, NULL); 
27     //UTF8虽然是Unicode的压缩形式，但也是多字节字符串，所以可以以char的形式保存 
28     char* sUtf8 = new char[sLen];  
29     //unicode版对应的strlen是wcslen 
30     WideCharToMultiByte(CP_UTF8, NULL, sUnicode, -1, sUtf8, sLen, NULL, NULL); 
31     printf("");
32     return sUtf8;
33     /*delete[] sUtf8; 
34     sUtf8 =NULL; */
35 }
36 
37 
38 //ansi转换为utf-8
39 char *AnsiToUtf8(char *sAnsi){
40     wchar_t *unicode = AnsiToUnicode(sAnsi);
41     free(sAnsi);
42 
43     if(unicode != NULL){
44         /*setlocale(LC_ALL,"chs");
45         wprintf(L"%s\n",unicode);*/
46 
47         char *utf_8 = UnicodeToUtf8(unicode);
48         if(utf_8){
49             free(unicode);
50             return utf_8;
51         }
52         else{
53             free(unicode);
54             return NULL;
55         }
56     }else
57         return NULL;
58     
59 }

标签：sLen,utf8,char,ansi,sUnicode,unicode,wchar,NULL
来源： https://www.cnblogs.com/wllwqdeai/p/14691088.html