From: John Maddock (john_at_[hidden])
Date: 2004-12-14 07:58:43
> i try to use the regex library for binary data.
> I tried this code:
>
> string h("\x81\x05\x00\x48");
> regex e2("\x81\x05\x00(.)");
> smatch m;
> if (regex_match(h, m, e2))
> {
> cout << "0. matched=" << (m[0].matched?"true":"false") << endl;
> cout << "0. match length=" << m[0].str().size() << endl;
> cout << "0. match character=" << m[0].str() << endl;
> cout << "1. matched=" << (m[1].matched?"true":"false") << endl;
> cout << "1. match length=" << m[1].str().size() << endl;
> cout << "1. match character=" << m[1].str() << endl;
> }
The thing is if you pass a const char* to either basic_string or
boost::regex then it will assume that the string is null-terminated, which
as you have found does the wrong thing in this case. In both cases use the
constructor that takes a string length as well as a pointer:
string h("\x81\x05\x00\x48", 4);
regex e2("\x81\x05\x00(.)", 7, regex::perl);
Hope this helps,
John.