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physx/samples/sampleframework/framework/include/SampleCommandLine.h

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+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//  * Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  * Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+//  * Neither the name of NVIDIA CORPORATION nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Copyright (c) 2008-2021 NVIDIA Corporation. All rights reserved.
+#ifndef SAMPLE_COMMANDLINE_H
+#define SAMPLE_COMMANDLINE_H
+
+#include <assert.h>
+
+namespace SampleFramework
+{
+
+	// Container for command-line arguments.
+	// This class assumes argument 0 is always the executable path!
+	class SampleCommandLine
+	{
+	public:
+		//! commandLineFilePathFallback is an optional fall-back to a configuration file containing command line arguments.
+		//  Its contents are only processed and used if the other constructor arguments yield only an executable path.
+		//	This is especially useful in the case of an Andriod platform, which does not support command line options.
+		//  e.g. commandLineFilePathFallback = "commandline.txt"
+		//  e.g. contents of commandline.txt = --argument1 --argument2
+
+		SampleCommandLine(unsigned int argc, const char *const* argv, const char * commandLineFilePathFallback = 0);
+		SampleCommandLine(const char *args, const char * commandLineFilePathFallback = 0);
+		~SampleCommandLine(void);
+
+		//! has a given command-line switch?
+		//  e.g. s=="foo" checks for -foo
+		bool hasSwitch(const char *s, const unsigned int argNum = invalidArgNum) const;
+
+		//! gets the value of a switch... 
+		//  e.g. s="foo" returns "bar" if '-foo=bar' is in the commandline.
+		const char* getValue(const char *s, unsigned int argNum = invalidArgNum) const;
+
+		// return how many command line arguments there are
+		unsigned int getNumArgs(void) const;
+
+		// what is the program name
+		const char* getProgramName(void) const;
+
+		// get the string that contains the unsued args
+		unsigned int unusedArgsBufSize(void) const;
+
+		// get the string that contains the unsued args
+		const char* getUnusedArgs(char *buf, unsigned int bufSize) const;
+
+		//! if the first argument is the given command.
+		bool isCommand(const char *s) const;
+
+		//! get the first argument assuming it isn't a switch.
+		//  e.g. for the command-line "myapp.exe editor -foo" it will return "editor".
+		const char *getCommand(void) const;
+
+		//! get the raw command-line argument list...
+		unsigned int      getArgC(void) const { return m_argc; }
+		const char *const*getArgV(void) const { return m_argv; }
+
+		//! whether or not an argument has been read already
+		bool isUsed(unsigned int argNum) const;
+
+	private:
+		SampleCommandLine(const SampleCommandLine&);
+		SampleCommandLine(void);
+		SampleCommandLine operator=(const SampleCommandLine&);
+		void initCommon(const char * commandLineFilePathFallback);
+		unsigned int		m_argc;
+		const char *const	*m_argv;
+		void				*m_freeme;
+		static const unsigned int invalidArgNum = 0xFFFFFFFFU;
+		bool*				m_argUsed;
+	};
+
+} // namespace SampleFramework
+
+#endif // SAMPLE_COMMANDLINE_H