zypp/base/Regex.cc

   1 /*---------------------------------------------------------------------\
   2 |                          ____ _   __ __ ___                          |
   3 |                         |__  / \ / / . \ . \                         |
   4 |                           / / \ V /|  _/  _/                         |
   5 |                          / /__ | | | | | |                           |
   6 |                         /_____||_| |_| |_|                           |
   7 |                                                                      |
   8 \---------------------------------------------------------------------*/
   9 /** \file zypp/base/Regex.cc
  10  *
  11 */
  12 #include <cstdio>
  13 #include <cstdarg>
  14
  15 #include <iostream>
  16
  17 #include "zypp/base/Regex.h"
  18
  19 using namespace zypp::str;
  20
  21 regex::regex(const std::string& str, int flags)
  22 {
  23     m_valid = true;
  24     if (regcomp(&m_preg, str.c_str(), REG_EXTENDED))
  25         m_valid = false;
  26 }
  27
  28 regex::~regex() throw()
  29 {
  30     if (m_valid)
  31         regfree(&m_preg);
  32 }
  33
  34 bool zypp::str::regex_match(const std::string& s, smatch& matches, const regex& regex)
  35 {
  36     bool r = regex.m_valid && !regexec(&regex.m_preg, s.c_str(), 12, &matches.pmatch[0], 0);
  37     if (r)
  38         matches.match_str = s;
  39     return r;
  40 }
  41
  42 bool zypp::str::regex_match(const std::string& s,  const regex& regex)
  43 {
  44     return !regexec(&regex.m_preg, s.c_str(), 0, NULL, 0);
  45 }
  46
  47 bool zypp::str::regex_search(const std::string& s, smatch& matches, const regex& regex)
  48 {
  49     bool r= regex.m_valid && !regexec(&regex.m_preg, s.c_str(), 12, &matches.pmatch[0], 0);
  50     if (r)
  51         matches.match_str = s;
  52     return r;
  53 }
  54
  55 smatch::smatch()
  56 {
  57     memset(&pmatch, -1, sizeof(pmatch));
  58 }
  59
  60 std::string smatch::operator[](unsigned i) const
  61 {
  62     if (i < 12 && pmatch[i].rm_so != -1)
  63         return match_str.substr(pmatch[i].rm_so, pmatch[i].rm_eo-pmatch[i].rm_so);
  64     return std::string();
  65 }
  66
  67
  68 unsigned smatch::size() const
  69 {
  70     unsigned matches = 0;
  71     while (matches < 12 && pmatch[matches+1].rm_so != -1) {
  72     //    std::cout << "match[" << matches << "]: *" << (*this)[matches
  73     //        +1] << "*" << std::endl;
  74         matches++;
  75     }
  76
  77     return matches;
  78 }