cpp_common: cpp_common: platform.h Source File

00001 /*
00002  * Copyright (C) 2010, Willow Garage, Inc.
00003  *
00004  * Redistribution and use in source and binary forms, with or without
00005  * modification, are permitted provided that the following conditions are met:
00006  *   * Redistributions of source code must retain the above copyright notice,
00007  *     this list of conditions and the following disclaimer.
00008  *   * Redistributions in binary form must reproduce the above copyright
00009  *     notice, this list of conditions and the following disclaimer in the
00010  *     documentation and/or other materials provided with the distribution.
00011  *   * Neither the names of Willow Garage, Inc. nor the names of its
00012  *     contributors may be used to endorse or promote products derived from
00013  *     this software without specific prior written permission.
00014  *
00015  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00016  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00017  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00018  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00019  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00020  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00021  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00022  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00023  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00024  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00025  * POSSIBILITY OF SUCH DAMAGE.
00026  */
00027 /*
00028  * Some common cross platform utilities.
00029  */
00030 #ifndef CPP_COMMON_PLATFORM_H_
00031 #define CPP_COMMON_PLATFORM_H_
00032 
00033 /******************************************************************************
00034 * Includes
00035 ******************************************************************************/
00036 
00037 #ifdef WIN32
00038   #ifdef _MSC_VER
00039     #define WIN32_LEAN_AND_MEAN // slimmer compile times
00040     #define _WINSOCKAPI_ // stops windows.h from including winsock.h (and lets us include winsock2.h)
00041     #define NOMINMAX // windows c++ pollutes the environment like any factory
00042   #endif
00043   #include <windows.h>
00044 #endif
00045 
00046 
00047 
00048 /******************************************************************************
00049 * Cross Platform Functions
00050 ******************************************************************************/
00051 
00052 #ifndef _MSC_VER
00053   #include <stdlib.h> // getenv
00054 #endif
00055 #include <string>
00056 
00057 namespace ros {
00058 
00063 inline bool get_environment_variable(std::string &str, const char* environment_variable) {
00064         char* env_var_cstr = NULL;
00065         #ifdef _MSC_VER
00066           _dupenv_s(&env_var_cstr, NULL,environment_variable);
00067         #else
00068           env_var_cstr = getenv(environment_variable);
00069         #endif
00070         if ( env_var_cstr ) {
00071                 str = std::string(env_var_cstr);
00072         #ifdef _MSC_VER
00073                   free(env_var_cstr);
00074         #endif
00075                 return true;
00076         } else {
00077                 str = std::string("");
00078                 return false;
00079         }
00080 }
00081 
00082 } // namespace ros
00083 
00084 #endif /* CPP_COMMON_PLATFORM_H_ */