C/C++文本文件件编码格式

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判断一文本文件编码格式。打开.txt文件，文件－〉另存为－〉编码－〉ASCII,Unicode,Unicode big endian,UTF-8

根据文件头判断文件可能是上面的几种编码格式

WineHxe测试的文件头

unsigned char uniTxt[] = {0xFF, 0xFE};// Unicode file headerunsigned char endianTxt[] = {0xFE, 0xFF};// Unicode big endian file headerunsigned char utf8Txt[] = {0xEF, 0xBB, 0xBF};// UTF_8 file header

菜鸟求拍砖

bool TextEncode(const char *fPath){char srcBuff[1024];char header[2];unsigned char uniTxt[] = {0xFF, 0xFE};// Unicode file headerunsigned char endianTxt[] = {0xFE, 0xFF};// Unicode big endian file headerunsigned char utf8Txt[] = {0xEF, 0xBB, 0xBF};// UTF_8 file headerint len = 0;int ascii = 0;FILE *pFile;pFile = fopen(fPath, "rb");if (NULL == pFile){return false;}//  ASCII range(0~127)while (1){len = fread(srcBuff, 1, 1024, pFile);if (0 == len){break;}for (int i=0; i<len; i++){header[0] = srcBuff[0];header[1] = srcBuff[1];header[2] = srcBuff[2];if (srcBuff[i]<0 || srcBuff[i]>127){ascii++;}}}if (0 == ascii)// ASCII file{printf("ASCII text\n");}else if ((2 == ascii) && (0 == memcmp(header, uniTxt, sizeof(uniTxt))))// Unicode file{printf("Unicode text\n");}else if ((2 == ascii) && (0 == memcmp(header, endianTxt, sizeof(endianTxt))))//  Unicode big endian file{printf("Unicode big endian text\n");}else if ((3 == ascii) && (0 == memcmp(header, utf8Txt, sizeof(utf8Txt))))// UTF-8 file{printf("UTF-8 text\n");} else{printf("Unknow\n");}fclose(pFile);return true; }