Semi-working base for bgfx renderer

2015-09-08 16:13:59 +02:00
parent c7f17c8ef0
commit c24b039005
47 changed files with 11176 additions and 43 deletions
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2012-2015 Branimir Karadzic. All rights reserved.
+ * License: http://www.opensource.org/licenses/BSD-2-Clause
+ */
+
+#ifndef BX_TOKENIZE_CMD_H_HEADER_GUARD
+#define BX_TOKENIZE_CMD_H_HEADER_GUARD
+
+#include <stdint.h>
+#include <stdio.h>
+#include <ctype.h>
+
+namespace bx
+{
+	// Reference:
+	// http://msdn.microsoft.com/en-us/library/a1y7w461.aspx
+	static inline const char* tokenizeCommandLine(const char* _commandLine, char* _buffer, uint32_t& _bufferSize, int& _argc, char* _argv[], int _maxArgvs, char _term = '\0')
+	{
+		int argc = 0;
+		const char* curr = _commandLine;
+		char* currOut = _buffer;
+		char term = ' ';
+		bool sub = false;
+		
+		enum ParserState
+		{
+			SkipWhitespace,
+			SetTerm,
+			Copy,
+			Escape,
+			End,
+		};
+
+		ParserState state = SkipWhitespace;
+		
+		while ('\0' != *curr
+		&&     _term != *curr
+		&&     argc < _maxArgvs)
+		{
+			switch (state)
+			{
+				case SkipWhitespace:
+					for (; isspace(*curr); ++curr) {}; // skip whitespace
+					state = SetTerm;
+					break;
+					
+				case SetTerm:
+					if ('"' == *curr)
+					{
+						term = '"';
+						++curr; // skip begining quote
+					}
+					else
+					{
+						term = ' ';
+					}
+					
+					_argv[argc] = currOut;
+					++argc;
+					
+					state = Copy;
+					break;
+					
+				case Copy:
+					if ('\\' == *curr)
+					{
+						state = Escape;
+					}
+					else if ('"' == *curr
+						&&  '"' != term)
+					{
+						sub = !sub;
+					}
+					else if (isspace(*curr) && !sub)
+					{
+						state = End;
+					}
+					else if (term != *curr || sub)
+					{
+						*currOut = *curr;
+						++currOut;
+					}
+					else
+					{
+						state = End;
+					}
+					++curr;
+					break;
+					
+				case Escape:
+					{
+						const char* start = --curr;
+						for (; '\\' == *curr; ++curr) {};
+
+						if ('"' != *curr)
+						{
+							int count = (int)(curr-start);
+
+							curr = start;
+							for (int ii = 0; ii < count; ++ii)
+							{
+								*currOut = *curr;
+								++currOut;
+								++curr;
+							}
+						}
+						else
+						{
+							curr = start+1;
+							*currOut = *curr;
+							++currOut;
+							++curr;
+						}
+					}
+					state = Copy;
+					break;
+					
+				case End:
+					*currOut = '\0';
+					++currOut;
+					state = SkipWhitespace;
+					break;
+			}
+		}
+		
+		*currOut = '\0';
+		if (0 < argc
+		&&  '\0' == _argv[argc-1][0])
+		{
+			--argc;
+		}
+
+		_bufferSize = (uint32_t)(currOut - _buffer);
+		_argc = argc;
+
+		if ('\0' != *curr)
+		{
+			++curr;
+		}
+
+		return curr;
+	}
+
+} // namespace bx
+
+#endif // TOKENIZE_CMD_H_HEADER_GUARD