src/base/match.cc

   1 /*
   2  * Copyright (c) 2019 The Regents of the University of California
   3  * Copyright (c) 2004-2005 The Regents of The University of Michigan
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met: redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer;
  10  * redistributions in binary form must reproduce the above copyright
  11  * notice, this list of conditions and the following disclaimer in the
  12  * documentation and/or other materials provided with the distribution;
  13  * neither the name of the copyright holders nor the names of its
  14  * contributors may be used to endorse or promote products derived from
  15  * this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include "base/match.hh"
  31
  32 #include "base/str.hh"
  33
  34 using namespace std;
  35
  36 ObjectMatch::ObjectMatch()
  37 {
  38 }
  39
  40 ObjectMatch::ObjectMatch(const string &expr)
  41 {
  42     setExpression(expr);
  43 }
  44
  45 void
  46 ObjectMatch::add(const ObjectMatch &other)
  47 {
  48     tokens.insert(tokens.end(), other.tokens.begin(), other.tokens.end());
  49 }
  50
  51 void
  52 ObjectMatch::setExpression(const string &expr)
  53 {
  54     tokens.resize(1);
  55     tokenize(tokens[0], expr, '.');
  56 }
  57
  58 void
  59 ObjectMatch::setExpression(const vector<string> &expr)
  60 {
  61     if (expr.empty()) {
  62         tokens.resize(0);
  63     } else {
  64         tokens.resize(expr.size());
  65         for (vector<string>::size_type i = 0; i < expr.size(); ++i)
  66             tokenize(tokens[i], expr[i], '.');
  67     }
  68 }
  69
  70 /**
  71  * @todo this should probably be changed to just use regular
  72  * expression code
  73  */
  74 bool
  75 ObjectMatch::domatch(const string &name) const
  76 {
  77     vector<string> name_tokens;
  78     tokenize(name_tokens, name, '.');
  79     int ntsize = name_tokens.size();
  80
  81     int num_expr = tokens.size();
  82     for (int i = 0; i < num_expr; ++i) {
  83         const vector<string> &token = tokens[i];
  84         int jstop = token.size();
  85
  86         bool match = true;
  87         for (int j = 0; j < jstop; ++j) {
  88             if (j >= ntsize)
  89                 break;
  90
  91             const string &var = token[j];
  92             if (var != "*" && var != name_tokens[j]) {
  93                 match = false;
  94                 break;
  95             }
  96         }
  97
  98         if (match)
  99             return true;
 100     }
 101
 102     return false;
 103 }
 104
 105 std::vector<std::vector<std::string> >
 106 ObjectMatch::getExpressions()
 107 {
 108     std::vector<std::vector<std::string> > to_return;
 109     for (const auto &expression: tokens) {
 110         std::vector<std::string> to_add;
 111         to_add.insert(to_add.end(), expression.begin(), expression.end());
 112         to_return.push_back(to_add);
 113     }
 114
 115     return to_return;
 116 }
 117