unsigned String::replace(regex& expr, const char *cp, unsigned flags)
{
#ifdef HAVE_REGEX_H
size_t cpl = 0;
if(cp)
cpl = strlen(cp);
if(!str || str->len == 0)
return 0;
if(expr.match(str->text, flags))
return 0;
ssize_t adjust = 0;
unsigned member = 0;
while(member < expr.members()) {
ssize_t tcl = expr.size(member);
ssize_t offset = (expr.offset(member) + adjust);
if(!tcl)
break;
++member;
cut(offset, tcl);
if(cpl) {
paste(offset, cp);
adjust += (cpl - tcl);
}
}
return member;
#else
return 0;
#endif
}
void show_flags(const regex& rgx)
{ // extract and show flag values
regex::flag_type flags = rgx.flags();
if ((flags & regex::ECMAScript) == regex::ECMAScript)
cout << "ECMAScript";
else if ((flags & regex::basic) == regex::basic)
cout << "basic";
else if ((flags & regex::extended) == regex::extended)
cout << "extended";
else if ((flags & regex::grep) == regex::grep)
cout << "grep";
else if ((flags & regex::egrep) == regex::egrep)
cout << "egrep";
else if ((flags & regex::awk) == regex::awk)
cout << "awk";
else
cout << "unknown grammar";
if ((flags & regex::icase) == regex::icase)
cout << " | icase";
if ((flags & regex::collate) == regex::collate)
cout << " | collate";
if ((flags & regex::nosubs) == regex::nosubs)
cout << " | nosubs";
if ((flags & regex::optimize) == regex::optimize)
cout << " | optimize";
cout << '\n';
}
bool regex_match(const string & str, smatch & matches, const regex & re){
Poco::RegularExpression::MatchVec pocomatches;
auto ret = re.match( str, 0, pocomatches );
matches.clear();
for(const auto & m: pocomatches){
matches.push_back(regmatch(str,m));
}
return ret;
}
