这段时间在做一个图片传输的功能,因为图片不是很大而且传输频率也不是非常的频繁,于是就做的是一次传输。先把图片读入内存,然后再转为16进制,然后发送。
std::string ReadFiletoHex(std::string path)
{
unsigned char c;
char buf[2];
std::string result = "";
std::ifstream fread(path,std::ios::binary);
while(fread.read((char*)(&c), sizeof(c)))
{
sprintf(buf, "%02X", c);
result += buf;
}
fread.close();
return result;
}
int WriteHextoFile(std::string file,std::string path)
{
std::string hex = file;
int len = hex.length();
std::string newString;
for(int i=0; i< len; i+=2)
{
std::string byte = hex.substr(i,2);
char chr = (char) (int)strtol(byte.c_str(), NULL, 16);
newString.push_back(chr);
}
std::ofstream fwrite;
fwrite.open(path, std::ofstream::out |std::ios::binary);
fwrite.write(newString.c_str(), sizeof(char) * (newString.size()));
fwrite.close();
return 0;
}
原文:http://my.oschina.net/bobwei/blog/523873