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Diffstat (limited to 'antlr-3.4/runtime/C/include/antlr3commontoken.h')
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1 files changed, 367 insertions, 0 deletions
diff --git a/antlr-3.4/runtime/C/include/antlr3commontoken.h b/antlr-3.4/runtime/C/include/antlr3commontoken.h new file mode 100644 index 0000000..c48068e --- /dev/null +++ b/antlr-3.4/runtime/C/include/antlr3commontoken.h @@ -0,0 +1,367 @@ +/** \file + * \brief Defines the interface for a common token. + * + * All token streams should provide their tokens using an instance + * of this common token. A custom pointer is provided, wher you may attach + * a further structure to enhance the common token if you feel the need + * to do so. The C runtime will assume that a token provides implementations + * of the interface functions, but all of them may be rplaced by your own + * implementation if you require it. + */ +#ifndef _ANTLR3_COMMON_TOKEN_H +#define _ANTLR3_COMMON_TOKEN_H + +// [The "BSD licence"] +// Copyright (c) 2005-2009 Jim Idle, Temporal Wave LLC +// http://www.temporal-wave.com +// http://www.linkedin.com/in/jimidle +// +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions +// are met: +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// 2. 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. +// 3. The name of the author may not be used to endorse or promote products +// derived from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + +#include <antlr3defs.h> + +/** How many tokens to allocate at once in the token factory + */ +#define ANTLR3_FACTORY_POOL_SIZE 1024 + +/* Base token types, which all lexer/parser tokens come after in sequence. + */ + +/** Indicator of an invalid token + */ +#define ANTLR3_TOKEN_INVALID 0 + +#define ANTLR3_EOR_TOKEN_TYPE 1 + +/** Imaginary token type to cause a traversal of child nodes in a tree parser + */ +#define ANTLR3_TOKEN_DOWN 2 + +/** Imaginary token type to signal the end of a stream of child nodes. + */ +#define ANTLR3_TOKEN_UP 3 + +/** First token that can be used by users/generated code + */ + +#define ANTLR3_MIN_TOKEN_TYPE ANTLR3_TOKEN_UP + 1 + +/** End of file token + */ +#define ANTLR3_TOKEN_EOF (ANTLR3_CHARSTREAM_EOF & 0xFFFFFFFF) + +/** Default channel for a token + */ +#define ANTLR3_TOKEN_DEFAULT_CHANNEL 0 + +/** Reserved channel number for a HIDDEN token - a token that + * is hidden from the parser. + */ +#define HIDDEN 99 + +#ifdef __cplusplus +extern "C" { +#endif + +// Indicates whether this token is carrying: +// +// State | Meaning +// ------+-------------------------------------- +// 0 | Nothing (neither rewrite text, nor setText) +// 1 | char * to user supplied rewrite text +// 2 | pANTLR3_STRING because of setText or similar action +// +#define ANTLR3_TEXT_NONE 0 +#define ANTLR3_TEXT_CHARP 1 +#define ANTLR3_TEXT_STRING 2 + +/** The definition of an ANTLR3 common token structure, which all implementations + * of a token stream should provide, installing any further structures in the + * custom pointer element of this structure. + * + * \remark + * Token streams are in essence provided by lexers or other programs that serve + * as lexers. + */ +typedef struct ANTLR3_COMMON_TOKEN_struct +{ + /** The actual type of this token + */ + ANTLR3_UINT32 type; + + /** Indicates that a token was produced from the token factory and therefore + * the the freeToken() method should not do anything itself because + * token factory is responsible for deleting it. + */ + ANTLR3_BOOLEAN factoryMade; + + /// A string factory that we can use if we ever need the text of a token + /// and need to manufacture a pANTLR3_STRING + /// + pANTLR3_STRING_FACTORY strFactory; + + /** The line number in the input stream where this token was derived from + */ + ANTLR3_UINT32 line; + + /** The offset into the input stream that the line in which this + * token resides starts. + */ + void * lineStart; + + /** The character position in the line that this token was derived from + */ + ANTLR3_INT32 charPosition; + + /** The virtual channel that this token exists in. + */ + ANTLR3_UINT32 channel; + + /** Pointer to the input stream that this token originated in. + */ + pANTLR3_INPUT_STREAM input; + + /** What the index of this token is, 0, 1, .., n-2, n-1 tokens + */ + ANTLR3_MARKER index; + + /** The character offset in the input stream where the text for this token + * starts. + */ + ANTLR3_MARKER start; + + /** The character offset in the input stream where the text for this token + * stops. + */ + ANTLR3_MARKER stop; + + /// Indicates whether this token is carrying: + /// + /// State | Meaning + /// ------+-------------------------------------- + /// 0 | Nothing (neither rewrite text, nor setText) + /// 1 | char * to user supplied rewrite text + /// 2 | pANTLR3_STRING because of setText or similar action + /// + /// Affects the union structure tokText below + /// (uses 32 bit so alignment is always good) + /// + ANTLR3_UINT32 textState; + + union + { + /// Pointer that is used when the token just has a pointer to + /// a char *, such as when a rewrite of an imaginary token supplies + /// a string in the grammar. No sense in constructing a pANTLR3_STRING just + /// for that, as mostly the text will not be accessed - if it is, then + /// we will build a pANTLR3_STRING for it a that point. + /// + pANTLR3_UCHAR chars; + + /// Some token types actually do carry around their associated text, hence + /// (*getText)() will return this pointer if it is not NULL + /// + pANTLR3_STRING text; + } + tokText; + + /** Because it is a bit more of a hassle to override an ANTLR3_COMMON_TOKEN + * as the standard structure for a token, a number of user programmable + * elements are allowed in a token. This is one of them. + */ + ANTLR3_UINT32 user1; + + /** Because it is a bit more of a hassle to override an ANTLR3_COMMON_TOKEN + * as the standard structure for a token, a number of user programmable + * elements are allowed in a token. This is one of them. + */ + ANTLR3_UINT32 user2; + + /** Because it is a bit more of a hassle to override an ANTLR3_COMMON_TOKEN + * as the standard structure for a token, a number of user programmable + * elements are allowed in a token. This is one of them. + */ + ANTLR3_UINT32 user3; + + /** Pointer to a custom element that the ANTLR3 programmer may define and install + */ + void * custom; + + /** Pointer to a function that knows how to free the custom structure when the + * token is destroyed. + */ + void (*freeCustom)(void * custom); + + /* ============================== + * API + */ + + /** Pointer to function that returns the text pointer of a token, use + * toString() if you want a pANTLR3_STRING version of the token. + */ + pANTLR3_STRING (*getText)(struct ANTLR3_COMMON_TOKEN_struct * token); + + /** Pointer to a function that 'might' be able to set the text associated + * with a token. Imaginary tokens such as an ANTLR3_CLASSIC_TOKEN may actually + * do this, however many tokens such as ANTLR3_COMMON_TOKEN do not actaully have + * strings associated with them but just point into the current input stream. These + * tokens will implement this function with a function that errors out (probably + * drastically. + */ + void (*setText)(struct ANTLR3_COMMON_TOKEN_struct * token, pANTLR3_STRING text); + + /** Pointer to a function that 'might' be able to set the text associated + * with a token. Imaginary tokens such as an ANTLR3_CLASSIC_TOKEN may actually + * do this, however many tokens such as ANTLR3_COMMON_TOKEN do not actully have + * strings associated with them but just point into the current input stream. These + * tokens will implement this function with a function that errors out (probably + * drastically. + */ + void (*setText8)(struct ANTLR3_COMMON_TOKEN_struct * token, pANTLR3_UINT8 text); + + /** Pointer to a function that returns the token type of this token + */ + ANTLR3_UINT32 (*getType)(struct ANTLR3_COMMON_TOKEN_struct * token); + + /** Pointer to a function that sets the type of this token + */ + void (*setType)(struct ANTLR3_COMMON_TOKEN_struct * token, ANTLR3_UINT32 ttype); + + /** Pointer to a function that gets the 'line' number where this token resides + */ + ANTLR3_UINT32 (*getLine)(struct ANTLR3_COMMON_TOKEN_struct * token); + + /** Pointer to a function that sets the 'line' number where this token reside + */ + void (*setLine)(struct ANTLR3_COMMON_TOKEN_struct * token, ANTLR3_UINT32 line); + + /** Pointer to a function that gets the offset in the line where this token exists + */ + ANTLR3_INT32 (*getCharPositionInLine) (struct ANTLR3_COMMON_TOKEN_struct * token); + + /** Pointer to a function that sets the offset in the line where this token exists + */ + void (*setCharPositionInLine) (struct ANTLR3_COMMON_TOKEN_struct * token, ANTLR3_INT32 pos); + + /** Pointer to a function that gets the channel that this token was placed in (parsers + * can 'tune' to these channels. + */ + ANTLR3_UINT32 (*getChannel) (struct ANTLR3_COMMON_TOKEN_struct * token); + + /** Pointer to a function that sets the channel that this token should belong to + */ + void (*setChannel) (struct ANTLR3_COMMON_TOKEN_struct * token, ANTLR3_UINT32 channel); + + /** Pointer to a function that returns an index 0...n-1 of the token in the token + * input stream. + */ + ANTLR3_MARKER (*getTokenIndex) (struct ANTLR3_COMMON_TOKEN_struct * token); + + /** Pointer to a function that can set the token index of this token in the token + * input stream. + */ + void (*setTokenIndex) (struct ANTLR3_COMMON_TOKEN_struct * token, ANTLR3_MARKER); + + /** Pointer to a function that gets the start index in the input stream for this token. + */ + ANTLR3_MARKER (*getStartIndex) (struct ANTLR3_COMMON_TOKEN_struct * token); + + /** Pointer to a function that sets the start index in the input stream for this token. + */ + void (*setStartIndex) (struct ANTLR3_COMMON_TOKEN_struct * token, ANTLR3_MARKER index); + + /** Pointer to a function that gets the stop index in the input stream for this token. + */ + ANTLR3_MARKER (*getStopIndex) (struct ANTLR3_COMMON_TOKEN_struct * token); + + /** Pointer to a function that sets the stop index in the input stream for this token. + */ + void (*setStopIndex) (struct ANTLR3_COMMON_TOKEN_struct * token, ANTLR3_MARKER index); + + /** Pointer to a function that returns this token as a text representation that can be + * printed with embedded control codes such as \n replaced with the printable sequence "\\n" + * This also yields a string structure that can be used more easily than the pointer to + * the input stream in certain situations. + */ + pANTLR3_STRING (*toString) (struct ANTLR3_COMMON_TOKEN_struct * token); +} + ANTLR3_COMMON_TOKEN; + +/** \brief ANTLR3 Token factory interface to create lots of tokens efficiently + * rather than creating and freeing lots of little bits of memory. + */ +typedef struct ANTLR3_TOKEN_FACTORY_struct +{ + /** Pointers to the array of tokens that this factory has produced so far + */ + pANTLR3_COMMON_TOKEN *pools; + + /** Current pool tokens we are allocating from + */ + ANTLR3_INT32 thisPool; + + /** Maximum pool count we have available + */ + ANTLR3_INT32 maxPool; + + /** The next token to throw out from the pool, will cause a new pool allocation + * if this exceeds the available tokenCount + */ + ANTLR3_UINT32 nextToken; + + /** Trick to initialize tokens and their API quickly, we set up this token when the + * factory is created, then just copy the memory it uses into the new token. + */ + ANTLR3_COMMON_TOKEN unTruc; + + /** Pointer to an input stream that is using this token factory (may be NULL) + * which will be assigned to the tokens automatically. + */ + pANTLR3_INPUT_STREAM input; + + /** Pointer to a function that returns a new token + */ + pANTLR3_COMMON_TOKEN (*newToken) (struct ANTLR3_TOKEN_FACTORY_struct * factory); + + /** Pointer to a function that resets the factory so you can reuse the pools it + * has laready allocated + */ + void (*reset) (struct ANTLR3_TOKEN_FACTORY_struct * factory); + + /** Pointer to a function that changes teh curent inptu stream so that + * new tokens are created with reference to their originating text. + */ + void (*setInputStream) (struct ANTLR3_TOKEN_FACTORY_struct * factory, pANTLR3_INPUT_STREAM input); + /** Pointer to a function the destroys the factory + */ + void (*close) (struct ANTLR3_TOKEN_FACTORY_struct * factory); +} + ANTLR3_TOKEN_FACTORY; + +#ifdef __cplusplus +} +#endif + +#endif |