102 lines
2.2 KiB
Plaintext
102 lines
2.2 KiB
Plaintext
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2017 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_EnvVar
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#define OSG_EnvVar 1
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#include <osg/Config>
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#ifdef OSG_ENVVAR_SUPPORTED
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#include <sstream>
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#endif
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namespace osg {
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template<typename T>
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bool getEnvVar(const char* name, T& value)
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{
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#ifdef OSG_ENVVAR_SUPPORTED
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const char* ptr = getenv(name);
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if (!ptr) return false;
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std::istringstream str(ptr);
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str >> value;
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return !str.fail();
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#else
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return false;
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#endif
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}
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template<>
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bool getEnvVar(const char* name, std::string& value)
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{
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#ifdef OSG_ENVVAR_SUPPORTED
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const char* ptr = getenv(name);
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if (!ptr) return false;
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value = ptr;
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return true;
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#else
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return false;
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#endif
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}
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template<typename T1, typename T2>
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bool getEnvVar(const char* name, T1& value1, T2& value2)
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{
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#ifdef OSG_ENVVAR_SUPPORTED
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const char* ptr = getenv(name);
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if (!ptr) return false;
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std::istringstream str(ptr);
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str >> value1 >> value2;
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return !str.fail();
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#else
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return false;
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#endif
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}
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template<typename T1, typename T2, typename T3>
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bool getEnvVar(const char* name, T1& value1, T2& value2, T3& value3)
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{
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#ifdef OSG_ENVVAR_SUPPORTED
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const char* ptr = getenv(name);
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if (!ptr) return false;
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std::istringstream str(ptr);
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str >> value1 >> value2 >> value3;
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return !str.fail();
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#else
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return false;
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#endif
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}
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template<typename T1, typename T2, typename T3, typename T4>
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bool getEnvVar(const char* name, T1& value1, T2& value2, T3& value3, T4& value4)
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{
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#ifdef OSG_ENVVAR_SUPPORTED
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const char* ptr = getenv(name);
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if (!ptr) return false;
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std::istringstream str(ptr);
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str >> value1 >> value2 >> value3 >> value4;
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return !str.fail();
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#else
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return false;
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#endif
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}
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}
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# endif
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