AnsiToUtf8 和 Utf8ToAnsi

在服务端数据库的处理当中，涉及中文字符的结构体字段，需要转为Utf8后再存储到表项中。
从数据库中取出包含中文字符的字段后，如果需要保存到char *类型的结构体成员中，需要转为Ansi后再保存。
从数据库中取出类型数字的字段后，如果需要保存到int型的结构体成员中，需要调用atoi函数进行处理后再保存。

1 static char *AnsiToUtf8(char *pchAnsi)
2 {
3     int uSize=0;
4     WCHAR *pwText =NULL;
5     char *pchUtf8=NULL;
6     int nUtf8Len = 0;
7
8     if(NULL == pchAnsi)
9     {
10         return NULL;
11     }
12
13     do
14     {
15         uSize = MultiByteToWideChar(CP_ACP,0,pchAnsi,-1,NULL,0);
16         if(uSize <=0)
17         {
18             break;
19         }
20         pwText = (wchar_t*)malloc((uSize+1)*sizeof(wchar_t));
21         if(!pwText)
22         {
23             break;
24         }
25
26         memset((void*)pwText,0,sizeof(wchar_t)*(uSize+1));
27         MultiByteToWideChar(CP_ACP,0,pchAnsi,-1,pwText,uSize);
28
29         //widechar to utf8
30         nUtf8Len = WideCharToMultiByte(CP_UTF8, 0, pwText, -1, NULL, 0, NULL, NULL);
31         if (0 >= nUtf8Len)
32         {
33             break;
34         }
35
36         pchUtf8=(char *)malloc(nUtf8Len+2);
37         if(NULL == pchUtf8)
38         {
39             break;
40         }
41         memset(pchUtf8,0,nUtf8Len+2);
42
43         nUtf8Len = WideCharToMultiByte(CP_UTF8, 0, pwText, -1, pchUtf8, nUtf8Len, NULL, NULL);
44         if (0 >= nUtf8Len)
45         {
46             free(pchUtf8);
47             pchUtf8 = NULL;
48             break;
49         }
50
51
52     } while (0);
53
54     if(NULL!=pwText)
55     {
56         free(pwText);
57     }
58
59     return pchUtf8;
60 }
61
62 static char *Utf8ToAnsi(char *pchUtf8)
63 {
64     int uSize=0;
65     WCHAR *pwText =NULL;
66     char *pchAnsic=NULL;
67     int ansicStrLen = 0;
68
69     if(NULL == pchUtf8)
70     {
71         return NULL;
72     }
73
74     do
75     {
76         uSize = MultiByteToWideChar(CP_UTF8,0,pchUtf8,-1,NULL,0);
77         if(uSize <=0)
78         {
79             break;
80         }
81         pwText = (wchar_t*)malloc((uSize+1)*sizeof(wchar_t));
82         if(!pwText)
83         {
84             break;
85         }
86         memset((void*)pwText,0,sizeof(wchar_t)*(uSize+1));
87         MultiByteToWideChar(CP_UTF8,0,pchUtf8,-1,pwText,uSize);
88
89         //widechar to utf8
90         ansicStrLen = WideCharToMultiByte(CP_ACP, 0, pwText, -1, NULL, 0, NULL, NULL);
91         if (0 >= ansicStrLen)
92         {
93             break;
94         }
95
96         pchAnsic=(char *)malloc(ansicStrLen+2);
97         if(NULL == pchAnsic)
98         {
99             break;
100         }
101         memset(pchAnsic,0,ansicStrLen+2);
102
103         ansicStrLen = WideCharToMultiByte(CP_ACP, 0, pwText, -1, pchAnsic, ansicStrLen, NULL, NULL);
104         if (0 >= ansicStrLen)
105         {
106             free(pchAnsic);
107             pchAnsic = NULL;
108             break;
109         }
110
111     } while (0);
112
113     if(NULL != pwText)
114     {
115         free(pwText);
116     }
117
118     return pchAnsic;
119
120 }