C語言-字符編碼轉換：UTF與GB2312

本文轉載自查看原文 2016-01-07 11:12 1929 gb2312/ c/ utf/ 轉換/ C編程/ iconv

依賴庫libiconv，libiconv庫的交叉編譯不做描述，網上很多

  1 #include <stdio.h>
  2 #include <stdlib.h>
  3 #include <stdint.h>
  4 #include "iconv.h"
  5 #include "eventlist.h"
  6 
  7 static int ChangeCode( const char* pFromCode, const char* pToCode, const char* pInBuf,
  8                  size_t* piInLen,  char* pOutBuf,  size_t* piOutLen )
  9 {
 10     int iRet;
 11     char **pin = &pInBuf;  
 12     char **pout = &pOutBuf;  
 13     iconv_t hIconv;
 14     
 15     //printf("%s: outlen=%d, inlen=%d\n", __FUNCTION__, *piOutLen, *piInLen);
 16 
 17     //打開字符集轉換
 18     hIconv = iconv_open( pToCode, pFromCode );
 19     if ( -1 == (int)hIconv )
 20     {
 21         perror("iconv_open");
 22         return -1;
 23     }
 24     //開始轉換
 25     printf("%s: 1 outlen=%d\n", __FUNCTION__, *piOutLen);
 26     iRet = iconv( hIconv, pin, piInLen, pout, piOutLen );
 27     if ( -1 == iRet )
 28     {
 29         perror("iconv");
 30         return -1;  
 31     }
 32     printf("%s: 2 outlen=%d\n", __FUNCTION__, *piOutLen);
 33     
 34     //關閉字符集轉換
 35     iconv_close( hIconv );
 36 
 37     **pout = '\0';
 38     return iRet;
 39 }
 40 
 41 static int MAIN_UTFToGb2312(char  * pcFrom, char * pcTo, int iMaxToLen)
 42 {
 43     char * psInBuf = NULL;
 44     char * psOutBuf = NULL;
 45     unsigned int iInLen = 0;
 46     unsigned int iOutLen = 0;
 47     int iRet;
 48 
 49     iInLen = strlen(pcFrom)+1;
 50     psInBuf = (char *)malloc(iInLen);
 51     if ( NULL == psInBuf )
 52     {
 53         return 0;
 54     }
 55     memset(psInBuf, 0x0, iInLen);
 56     memcpy(psInBuf, pcFrom, iInLen);
 57     
 58     iOutLen = iMaxToLen;
 59     psOutBuf = (char *)malloc(iOutLen);
 60     if ( NULL == psOutBuf )
 61     {
 62         free(psInBuf);
 63         psInBuf = NULL;
 64         return 0;
 65     }
 66     memset(psOutBuf, 0x0, iOutLen);
 67     
 68     iRet = ChangeCode( "utf-8", "gb2312",  psInBuf, &iInLen, psOutBuf, &iOutLen );
 69     //iRet = u2g(psInBuf, iInLen, psOutBuf, iOutLen);
 70     if ( 0 != iRet )
 71     {
 72         printf("ChangeCode: Error\n");
 73         //return 0;
 74     }
 75     memcpy(pcTo, psOutBuf, iOutLen);
 76     printf("%s: iOutLen = %d\n", __FUNCTION__, iOutLen);
 77 
 78     free(psInBuf);
 79     psInBuf = NULL;
 80     free(psOutBuf);
 81     psOutBuf = NULL;
 82     
 83     return iOutLen;
 84     
 85 }
 86 
 87 static int MAIN_GB2312ToUTF(char  * pcFrom, char * pcTo, int iMaxToLen)
 88 {
 89     char * psInBuf = NULL;
 90     char * psOutBuf = NULL;
 91     unsigned int iInLen = 0;
 92     unsigned int iOutLen = 0;
 93     int iRet;
 94 
 95     iInLen = strlen(pcFrom)+1;
 96     psInBuf = (char *)malloc(iInLen);
 97     if ( NULL == psInBuf )
 98     {
 99         return 0;
100     }
101     memset(psInBuf, 0x0, iInLen);
102     memcpy(psInBuf, pcFrom, iInLen);
103     
104     iOutLen = iMaxToLen;
105     psOutBuf = (char *)malloc(iOutLen);
106     if ( NULL == psOutBuf )
107     {
108         free(psInBuf);
109         psInBuf = NULL;
110         return 0;
111     }
112     memset(psOutBuf, 0x0, iOutLen);
113     
114     iRet = ChangeCode( "gb2312", "utf-8",  psInBuf, &iInLen, psOutBuf, &iOutLen );
115     //iRet = u2g(psInBuf, iInLen, psOutBuf, iOutLen);
116     if ( 0 != iRet )
117     {
118         printf("ChangeCode: Error\n");
119         //return 0;
120     }
121     memcpy(pcTo, psOutBuf, iOutLen);
122     printf("%s: iOutLen = %d\n", __FUNCTION__, iOutLen);
123 
124     free(psInBuf);
125     psInBuf = NULL;
126     free(psOutBuf);
127     psOutBuf = NULL;
128     
129     return iOutLen;
130     
131 }
132 
133 int main()
134 {
135     char strUTF[]={
136                      0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6, 0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6, 
137                      0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6, 0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6,
138                      0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6, 0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6,
139                      0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6, 0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6, 
140                      0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6, 0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6,
141                      0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6, 0xE5, 0xBC, 0x80, 0xE8,0xBD, 0xA6, 0xE4, 0xBA, 0x8B, 0xE4, 0xBB, 0xB6,
142                      0x00, 0x00, 0x00
143                   };
144     char chTmpStr[256];
145     int len = 0;
146     
147     memset(chTmpStr, 0x0, 256);
148     MAIN_UTF2Gb2312(strUTF, chTmpStr, 256);
149     printf("Main: change=%s\n", chTmpStr);
150     
151     return 0;
152 }

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