161 lines
3.8 KiB
C++
161 lines
3.8 KiB
C++
#include "VrCodeFormatUtils.h"
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#ifdef _WIN32
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#include "windows.h"
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#endif
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//GB2312到UTF-8的转换
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int CVrCodeFormatUtils::GB2312ToUtf8(const char* gb2312, char* utf8)
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{
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int len = 0;
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#ifdef _WIN32
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len = MultiByteToWideChar(CP_ACP, 0, gb2312, -1, NULL, 0);
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wchar_t* wstr = new wchar_t[len + 1];
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memset(wstr, 0, len + 1);
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MultiByteToWideChar(CP_ACP, 0, gb2312, -1, wstr, len);
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len = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL);
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WideCharToMultiByte(CP_UTF8, 0, wstr, -1, utf8, len, NULL, NULL);
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if (wstr) delete[] wstr;
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#endif
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return len;
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}
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//判断是否是utf8
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bool CVrCodeFormatUtils::IsTextUTF8(const char* str, long length)
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{
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unsigned char chr;
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int nBytes = 0; // UFT8可用1-6个字节编码,ASCII用一个字节
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bool bAllAscii = true; // 如果全部都是ASCII, 说明不是UTF-8
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for (int i = 0; i < length; i++)
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{
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chr = *(str + i);
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if ((chr & 0x80) != 0) // 判断是否ASCII编码,如果不是,说明有可能是UTF-8, ASCII用7位编码,但用一个字节存,最高位标记为0,o0xxxxxxx
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{
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bAllAscii = false;
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}
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if (nBytes == 0) // 如果不是ASCII码,应该是多字节符,计算字节数
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{
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if (chr >= 0x80)
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{
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if (chr >= 0xFC && chr <= 0xFD)
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nBytes = 6;
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else if (chr >= 0xF8)
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nBytes = 5;
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else if (chr >= 0xF0)
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nBytes = 4;
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else if (chr >= 0xE0)
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nBytes = 3;
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else if (chr >= 0xC0)
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nBytes = 2;
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else
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return false;
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nBytes--;
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}
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}
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else // every char of ascii buffer looks like 10xxxxxx, except the first char
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{
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if ((chr & 0xC0) != 0x80)
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{
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return false;
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}
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nBytes--;
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}
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}
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if (nBytes > 0) // format error
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{
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return false;
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}
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if (bAllAscii) // if all chars are ascii, the buffer is not utf-8
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{
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return false;
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}
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return true;
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}
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//UTF-8到GB2312的转换
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int CVrCodeFormatUtils::Utf8ToGB2312(const char* utf8, char* gb2312)
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{
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int len = 0;
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#ifdef _WIN32
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len = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0);
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wchar_t* wstr = new wchar_t[len + 1];
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memset(wstr, 0, len + 1);
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MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wstr, len);
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len = WideCharToMultiByte(CP_ACP, 0, wstr, -1, NULL, 0, NULL, NULL);
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WideCharToMultiByte(CP_ACP, 0, wstr, -1, gb2312, len, NULL, NULL);
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if (wstr) delete[] wstr;
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#endif
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return len;
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}
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//GB2312到Unicode的转换
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int CVrCodeFormatUtils::GB2312ToUnicode(const char* gb2312, char* unicode)
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{
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int len = 0;
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#ifdef _WIN32
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UINT nCodePage = 936; //GB2312
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len = MultiByteToWideChar(nCodePage, 0, gb2312, -1, NULL, 0);
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wchar_t* wstr = new wchar_t[len + 1];
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memset(wstr, 0, len + 1);
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MultiByteToWideChar(nCodePage, 0, gb2312, -1, wstr, len);
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len = len * sizeof(wchar_t);
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memcpy(unicode, wstr, len);
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if (wstr) delete[] wstr;
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#endif
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return len;
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}
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//Unicode到GB2312的转换
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int CVrCodeFormatUtils::UnicodeToGB2312(const char* unicode, int size, char*gb2312)
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{
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int len = 0;
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#ifdef _WIN32
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UINT nCodePage = 936; //GB2312
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wchar_t* wstr = new wchar_t[size / 2 + 1];
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memcpy(wstr, unicode, size);
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len = WideCharToMultiByte(nCodePage, 0, wstr, -1, NULL, 0, NULL, NULL);
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WideCharToMultiByte(nCodePage, 0, wstr, -1, gb2312, len, NULL, NULL);
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if (wstr) delete[] wstr;
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#endif
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return len;
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}
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//UTF-8到Unicode的转换
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int CVrCodeFormatUtils::Utf8ToUnicode(const char* utf8, char*unicode)
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{
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int len = 0;
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#ifdef _WIN32
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MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0);
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wchar_t* wstr = new wchar_t[len + 1];
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memset(wstr, 0, len + 1);
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MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wstr, len);
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memcpy(unicode, wstr, len);
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if (wstr) delete[] wstr;
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#endif
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return len;
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}
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//Unicode到UTF-8的转换
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int CVrCodeFormatUtils::UnicodeToUtf8(const char* unicode, int size, char* utf8)
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{
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int len = 0;
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#ifdef _WIN32
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wchar_t* wstr = new wchar_t[size / 2 + 1];
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memcpy(wstr, unicode, size);
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len = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL);
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WideCharToMultiByte(CP_UTF8, 0, wstr, -1, utf8, len, NULL, NULL);
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if (wstr) delete[] wstr;
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#endif
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return len;
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} |