PackageSpecification.cc

   1 /*
   2  * Copyright (c) 2002, Robert Collins.
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     A copy of the GNU General Public License can be found at
  10  *     http://www.gnu.org/
  11  *
  12  * Written by Robert Collins  <rbtcollins@hotmail.com>
  13  *
  14  */
  15
  16 #include "PackageSpecification.h"
  17 #include <iostream>
  18 #include "package_version.h"
  19
  20 PackageSpecification::PackageSpecification (const std::string& packageName)
  21   : _packageName (packageName) , _operator (Equals), _version ()
  22 {
  23 }
  24
  25 const std::string&
  26 PackageSpecification::packageName () const
  27 {
  28   return _packageName;
  29 }
  30
  31 const PackageSpecification::_operators
  32 PackageSpecification::op() const
  33 {
  34   return _operator;
  35 }
  36
  37 const std::string&
  38 PackageSpecification::version() const
  39 {
  40   return _version;
  41 }
  42
  43 void
  44 PackageSpecification::setOperator (_operators anOperator)
  45 {
  46   _operator = anOperator;
  47 }
  48
  49 void
  50 PackageSpecification::setVersion (const std::string& aVersion)
  51 {
  52   _version = aVersion;
  53 }
  54
  55 bool
  56 PackageSpecification::satisfies (packageversion const &aPackage) const
  57 {
  58   if (casecompare(_packageName, aPackage.Name()) != 0)
  59     return false;
  60
  61   // The default values of _operator = Equals and _version is an empty-string
  62   // match any version
  63   if (_version.size())
  64     {
  65       int comparison = casecompare(aPackage.Canonical_version (), _version);
  66       switch (_operator)
  67         {
  68         case Equals:
  69           return (comparison == 0);
  70         case LessThan:
  71           return (comparison < 0);
  72         case MoreThan:
  73           return (comparison > 0);
  74         case LessThanEquals:
  75           return (comparison <= 0);
  76         case MoreThanEquals:
  77           return (comparison >= 0);
  78         default:
  79           return false;
  80         }
  81     }
  82   return true;
  83 }
  84
  85 std::ostream &
  86 operator << (std::ostream &os, PackageSpecification const &spec)
  87 {
  88   os << spec._packageName;
  89   if (spec._operator)
  90     os << " " << PackageSpecification::caption(spec._operator) << " " << spec._version;
  91   return os;
  92 }
  93
  94 char const *
  95 PackageSpecification::caption (_operators _value)
  96 {
  97   switch (_value)
  98     {
  99     case Equals:
 100     return "==";
 101     case LessThan:
 102     return "<";
 103     case MoreThan:
 104     return ">";
 105     case LessThanEquals:
 106     return "<=";
 107     case MoreThanEquals:
 108     return ">=";
 109     }
 110   // Pacify GCC: (all case options are checked above)
 111   return "Unknown operator";
 112 }