从小端C++ -16编码字节中获取UTF std::string的过程如下:
下面是一个示例代码,演示了如何从小端C++ -16编码字节中获取UTF std::string:
#include <iostream>
#include <string>
std::string getUTF8StringFromLE16(const char* data, int length) {
std::string utf8String;
int i = 0;
while (i < length) {
// 提取低位字节
unsigned char lowByte = data[i++];
// 提取高位字节
unsigned char highByte = data[i++];
// 将高位字节和低位字节组合成UTF-16编码字符
unsigned short utf16Char = (highByte << 8) | lowByte;
// 转换为UTF-8编码格式
if (utf16Char <= 0x7F) {
utf8String += static_cast<char>(utf16Char);
} else if (utf16Char <= 0x7FF) {
utf8String += static_cast<char>(0xC0 | ((utf16Char >> 6) & 0x1F));
utf8String += static_cast<char>(0x80 | (utf16Char & 0x3F));
} else {
utf8String += static_cast<char>(0xE0 | ((utf16Char >> 12) & 0x0F));
utf8String += static_cast<char>(0x80 | ((utf16Char >> 6) & 0x3F));
utf8String += static_cast<char>(0x80 | (utf16Char & 0x3F));
}
}
return utf8String;
}
int main() {
const char data[] = {0x68, 0x00, 0x65, 0x00, 0x6C, 0x00, 0x6C, 0x00, 0x6F, 0x00}; // "hello"的UTF-16编码
int length = sizeof(data) / sizeof(data[0]);
std::string utf8String = getUTF8StringFromLE16(data, length);
std::cout << "UTF-8 String: " << utf8String << std::endl;
return 0;
}
这段示例代码将从小端C++ -16编码字节中获取UTF-16编码的字符串"hello",并将其转换为UTF-8编码的std::string对象。输出结果为"hello"。
请注意,这只是一个简单的示例,实际应用中可能需要考虑更多的边界情况和错误处理。
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