Re: get some chars from a .txt file
In article <1169027836.050953.162390@11g2000cwr.googlegroups.com>,
James Kanze <james.kanze@gmail.com> wrote:
It's also possible to save a copy by reading directly into the
std::vector. The code to do so, however, is considerably more
difficult to get right, and unless your sequences have lengths
measuring in the tens of millions of characters, or more, you
probably won't notice any difference in response time.
A filtering streambuf to remove the end lines can be used
with istream_iterator<char> to fill the vector without the end lines.
class nolf_buf:public std::streambuf
{
std::vector<char> &data;
int overflow(int c = EOF)
{
try
{
if(c!=EOF && c!='\n')
data.push_back(char(c));
}
catch (...)
{
return EOF;
}
return '0'; // not eof
}
public:
nolf_buf(std::vector<char> &a):data(a){}
};
,,,
std::vector<char> data;
nolf_buf buf(data);
in_file >> &buf; // data now contains the file contents
.....
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