Check In tool source code based on Build tool project revision r1655.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8964 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 109 insertions, 0 deletions

diff --git a/BaseTools/Source/C/VfrCompile/Pccts/h/ATokenBuffer.h b/BaseTools/Source/C/VfrCompile/Pccts/h/ATokenBuffer.h
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+/* ANTLRTokenBuffer.h

+ *

+ * SOFTWARE RIGHTS

+ *

+ * We reserve no LEGAL rights to the Purdue Compiler Construction Tool

+ * Set (PCCTS) -- PCCTS is in the public domain.  An individual or

+ * company may do whatever they wish with source code distributed with

+ * PCCTS or the code generated by PCCTS, including the incorporation of

+ * PCCTS, or its output, into commerical software.

+ *

+ * We encourage users to develop software with PCCTS.  However, we do ask

+ * that credit is given to us for developing PCCTS.  By "credit",

+ * we mean that if you incorporate our source code into one of your

+ * programs (commercial product, research project, or otherwise) that you

+ * acknowledge this fact somewhere in the documentation, research report,

+ * etc...  If you like PCCTS and have developed a nice tool with the

+ * output, please mention that you developed it using PCCTS.  In

+ * addition, we ask that this header remain intact in our source code.

+ * As long as these guidelines are kept, we expect to continue enhancing

+ * this system and expect to make other tools available as they are

+ * completed.

+ *

+ * ANTLR 1.33

+ * Terence Parr

+ * Parr Research Corporation

+ * with Purdue University and AHPCRC, University of Minnesota

+ * 1989-2000

+ */

+

+#ifndef ATOKENBUFFER_H_GATE

+#define ATOKENBUFFER_H_GATE

+

+#include "pcctscfg.h"

+

+#include "pccts_stdlib.h"

+

+PCCTS_NAMESPACE_STD

+

+#include ATOKEN_H

+#include ATOKENSTREAM_H

+

+/*

+ * The parser is "attached" to an ANTLRTokenBuffer via interface

+ * functions: getToken() and bufferedToken().  The object that actually

+ * consumes characters and constructs tokens is connected to the

+ * ANTLRTokenBuffer via interface function ANTLRTokenStream::getToken();

+ * where ANTLRTokenStream is really just a behavior (class with no data).

+ * C++ does not have this abstraction and hence we simply have come up

+ * with a fancy name for "void *".  See the note in ANTLRTokenStream.h on

+ * the "behavior" of ANTLRTokenStream.

+ */

+

+class ANTLRParser;					// MR1

+

+class DllExportPCCTS ANTLRTokenBuffer {

+protected:

+	ANTLRTokenStream *input;        // where do I get tokens

+	int buffer_size;

+	int chunk_size;

+	int num_markers;

+	int k;                          // Need at least this many tokens in buffer

+	_ANTLRTokenPtr *buffer;	// buffer used for arbitrary lookahead

+	_ANTLRTokenPtr *tp;        // pts into buffer; current token ptr

+	_ANTLRTokenPtr *last;      // pts to last valid token in buffer

+	_ANTLRTokenPtr *next;      // place to put token from getANTLRToken()

+	_ANTLRTokenPtr *end_of_buffer;

+	/* when you try to write a token past this and there are no markers

+	   set, then move k-1 tokens back to the beginning of the buffer.

+	   We want to stay away from the end of the buffer because we have

+	   to extend it if a marker is set and we reach the end (we cannot

+	   move tokens to the beginning of the buffer in this case).

+	 */

+	_ANTLRTokenPtr *threshold;

+	unsigned char _deleteTokens;

+

+	// This function is filled in by the subclass; it initiates fetch of input

+	virtual _ANTLRTokenPtr getANTLRToken() { return input->getToken(); }

+	void makeRoom();

+	void extendBuffer();

+

+public:

+	ANTLRTokenBuffer(ANTLRTokenStream *in, int k=1, int chksz=50);

+	virtual ~ANTLRTokenBuffer();

+	virtual _ANTLRTokenPtr getToken();

+	virtual void rewind(int pos);

+	virtual int mark();

+	virtual _ANTLRTokenPtr bufferedToken(int i);

+

+	void noGarbageCollectTokens()	{ _deleteTokens=0; }

+	void garbageCollectTokens()		{ _deleteTokens=1; }

+

+	virtual int bufferSize() { return buffer_size; }

+	virtual int minTokens() { return k; }

+	virtual void setMinTokens(int k_new) { k = k_new; }

+

+	virtual void panic(const char *msg); /* MR20 const */

+

+	virtual int printMessage(FILE* pFile, const char* pFormat, ...); // MR23

+

+protected:						// MR1

+	ANTLRParser	*parser;			// MR1

+public:							// MR1

+	ANTLRParser	*setParser(ANTLRParser *p);	// MR1

+	ANTLRParser	*getParser();			    // MR1

+    ANTLRTokenStream *getLexer() const {    // MR12

+      return input;}                        // MR12

+};

+

+#endif