mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-04 13:23:26 +01:00
110 lines
4.0 KiB
C
110 lines
4.0 KiB
C
|
/* 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
|