source/pattern.cpp

   1 #include <stdexcept>
   2 #include "pattern.h"
   3
   4 using namespace std;
   5
   6 Pattern::Pattern(const string &pat)
   7 {
   8         string::size_type percent = pat.find('%');
   9         if(percent==string::npos)
  10                 throw invalid_argument("No percent sign in pattern");
  11         prefix = pat.substr(0, percent);
  12         suffix = pat.substr(percent+1);
  13 }
  14
  15 string Pattern::apply(const string &body) const
  16 {
  17         string result = body;
  18         if(body.compare(0, prefix.size(), prefix))
  19                 result = prefix+result;
  20         if(body.size()<=suffix.size() || body.compare(body.size()-suffix.size(), suffix.size(), suffix))
  21                 result += suffix;
  22         return result;
  23 }
  24
  25 list<string> Pattern::apply_list(const list<Pattern> &patterns, const string &body)
  26 {
  27         list<string> result;
  28         for(list<Pattern>::const_iterator i=patterns.begin(); i!=patterns.end(); ++i)
  29                 result.push_back(i->apply(body));
  30         return result;
  31 }