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 #if 0
  17 static const char *cvsid = "\n%%% $Id$\n";
  18 #endif
  19
  20 #include "PackageSpecification.h"
  21 #include "package_version.h"
  22
  23 PackageSpecification::PackageSpecification (String const &packageName)
  24   : _packageName (packageName) , _operator (0), _version ()
  25 {
  26 }
  27
  28 String const&
  29 PackageSpecification::packageName () const
  30 {
  31   return _packageName;
  32 }
  33
  34 void
  35 PackageSpecification::setOperator (_operators const &anOperator)
  36 {
  37   _operator = &anOperator;
  38 }
  39
  40 void
  41 PackageSpecification::setVersion (String const &aVersion)
  42 {
  43   _version = aVersion;
  44 }
  45
  46 bool
  47 PackageSpecification::satisfies (packageversion const &aPackage) const
  48 {
  49   if (_packageName.casecompare (aPackage.Name()) != 0)
  50     return false;
  51   if (_operator && _version.size()
  52       && !_operator->satisfies (aPackage.Canonical_version (), _version))
  53     return false;
  54   return true;
  55 }
  56
  57 String
  58 PackageSpecification::serialise () const
  59 {
  60   return _packageName;
  61 }
  62
  63 PackageSpecification &
  64 PackageSpecification::operator= (PackageSpecification const &rhs)
  65 {
  66   _packageName = rhs._packageName;
  67   return *this;
  68 }
  69
  70 std::ostream &
  71 operator << (std::ostream &os, PackageSpecification const &spec)
  72 {
  73   os << spec._packageName;
  74   if (spec._operator)
  75     os << " " << spec._operator->caption() << " " << spec._version;
  76   return os;
  77 }
  78
  79 const PackageSpecification::_operators PackageSpecification::Equals(0);
  80 const PackageSpecification::_operators PackageSpecification::LessThan(1);
  81 const PackageSpecification::_operators PackageSpecification::MoreThan(2);
  82 const PackageSpecification::_operators PackageSpecification::LessThanEquals(3);
  83 const PackageSpecification::_operators PackageSpecification::MoreThanEquals(4);
  84
  85 char const *
  86 PackageSpecification::_operators::caption () const
  87 {
  88   switch (_value)
  89     {
  90     case 0:
  91     return "==";
  92     case 1:
  93     return "<";
  94     case 2:
  95     return ">";
  96     case 3:
  97     return "<=";
  98     case 4:
  99     return ">=";
 100     }
 101   // Pacify GCC: (all case options are checked above)
 102   return "Unknown operator";
 103 }
 104
 105 bool
 106 PackageSpecification::_operators::satisfies (String const &lhs, String const &rhs) const
 107 {
 108   switch (_value)
 109     {
 110     case 0:
 111       return lhs.casecompare (rhs) == 0;
 112     case 1:
 113       return lhs.casecompare (rhs) < 0;
 114     case 2:
 115       return lhs.casecompare (rhs) > 0;
 116     case 3:
 117       return lhs.casecompare (rhs) <= 0;
 118     case 4:
 119       return lhs.casecompare (rhs) >= 0;
 120     }
 121   return false;
 122 }