libyui  3.0.10
/usr/src/RPM/BUILD/libyui-3.0.10/src/YEnvVar.cc
00001 /*
00002   Copyright (C) 2000-2012 Novell, Inc
00003   This library is free software; you can redistribute it and/or modify
00004   it under the terms of the GNU Lesser General Public License as
00005   published by the Free Software Foundation; either version 2.1 of the
00006   License, or (at your option) version 3.0 of the License. This library
00007   is distributed in the hope that it will be useful, but WITHOUT ANY
00008   WARRANTY; without even the implied warranty of MERCHANTABILITY or 
00009   FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
00010   License for more details. You should have received a copy of the GNU
00011   Lesser General Public License along with this library; if not, write
00012   to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
00013   Floor, Boston, MA 02110-1301 USA
00014 */
00015 
00016 
00017 /*-/
00018 
00019   File:         YEnvVar.cc
00020 
00021   Author:       Stefan Hundhammer <sh@suse.de>
00022 
00023 /-*/
00024 
00025 
00026 #include <stdlib.h>     // getenv()
00027 #include <string.h>     // strcmp(), strcasecmp()
00028 #include <ctype.h>      // tolower()
00029 
00030 #define YUILogComponent "ui"
00031 #include "YUILog.h"
00032 
00033 #include <YEnvVar.h>
00034 
00035 
00036 YEnvVar::YEnvVar( const std::string & name )
00037     : _name( name )
00038     , _isSet( false )
00039 {
00040     if ( ! _name.empty() )
00041     {
00042         const char * val = getenv( _name.c_str() );
00043 
00044         if ( val )
00045         {
00046             _isSet = true;
00047             _value = val;
00048         }
00049     }
00050 }
00051 
00052 
00053 bool
00054 YEnvVar::isEqual( const std::string & str, bool caseSensitive ) const
00055 {
00056     if ( ! _isSet )
00057         return false;
00058 
00059     if ( caseSensitive )
00060         return strcmp( _value.c_str(), str.c_str() ) == 0;
00061     else
00062         return strcasecmp( _value.c_str(), str.c_str() ) == 0;
00063 }
00064 
00065 bool
00066 YEnvVar::contains( const std::string & str, bool caseSensitive ) const
00067 {
00068     if ( ! _isSet )
00069         return false;
00070 
00071     if ( caseSensitive )
00072     {
00073         return _value.find( str ) != std::string::npos;
00074     }
00075     else
00076     {
00077         return tolower( _value ).find( tolower( str ) ) != std::string::npos;
00078     }
00079 }
00080 
00081 
00082 std::string tolower( const std::string & str )
00083 {
00084     std::string lowStr;
00085     lowStr.reserve( str.size() );
00086 
00087     for ( std::string::const_iterator it = str.begin();
00088           it != str.end();
00089           ++it )
00090     {
00091         lowStr += ::tolower( *it );
00092     }
00093 
00094     return lowStr;
00095 }
00096 
00097 
00098 std::ostream &
00099 operator<<( std::ostream & stream, const YEnvVar env )
00100 {
00101     if ( env.name().empty() )
00102     {
00103         stream << "<unnamed environment variable>";
00104     }
00105     else
00106     {
00107         if ( env.isSet() )
00108             stream << "$" << env.name() << "=\"" << env.value() << "\"";
00109         else
00110             stream << "$" << env.name() << ": <not set>";
00111     }
00112 
00113     return stream;
00114 }
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