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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1676 6f19259b-4bc3-4df7-8a09-765794883524
391 lines
14 KiB
C++
391 lines
14 KiB
C++
/*
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* syn.h
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*
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* This file includes definitions and macros associated with syntax diagrams
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*
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* SOFTWARE RIGHTS
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*
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* We reserve no LEGAL rights to the Purdue Compiler Construction Tool
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* Set (PCCTS) -- PCCTS is in the public domain. An individual or
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* company may do whatever they wish with source code distributed with
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* PCCTS or the code generated by PCCTS, including the incorporation of
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* PCCTS, or its output, into commerical software.
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*
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* We encourage users to develop software with PCCTS. However, we do ask
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* that credit is given to us for developing PCCTS. By "credit",
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* we mean that if you incorporate our source code into one of your
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* programs (commercial product, research project, or otherwise) that you
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* acknowledge this fact somewhere in the documentation, research report,
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* etc... If you like PCCTS and have developed a nice tool with the
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* output, please mention that you developed it using PCCTS. In
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* addition, we ask that this header remain intact in our source code.
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* As long as these guidelines are kept, we expect to continue enhancing
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* this system and expect to make other tools available as they are
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* completed.
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*
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* ANTLR 1.33
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* Terence Parr
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* Parr Research Corporation
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* with Purdue University and AHPCRC, University of Minnesota
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* 1989-2001
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*/
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#include "set.h"
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#define NumNodeTypes 4
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#define NumJuncTypes 9
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/* List the different node types */
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#define nJunction 1
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#define nRuleRef 2
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#define nToken 3
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#define nAction 4
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/* Different types of junctions */
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#define aSubBlk 1
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#define aOptBlk 2
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#define aLoopBlk 3
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#define EndBlk 4
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#define RuleBlk 5
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#define Generic 6 /* just a junction--no unusual characteristics */
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#define EndRule 7
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#define aPlusBlk 8
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#define aLoopBegin 9
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typedef int NodeType;
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#define TreeBlockAllocSize 500
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#define JunctionBlockAllocSize 200
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#define ActionBlockAllocSize 50
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#define RRefBlockAllocSize 100
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#define TokenBlockAllocSize 100
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#ifdef __cplusplus
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class ActionNode;
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class Junction;
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#endif
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/* note that 'right' is used by the tree node allocator as a ptr for linked list */
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typedef struct _tree {
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struct _tree *down, *right;
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int token;
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union {
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int rk; /* if token==EpToken, => how many more tokens req'd */
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struct _tree *tref; /* if token==TREE_REF */
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set sref; /* if token==SET */
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} v;
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#ifdef TREE_DEBUG
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int in_use;
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int seq;
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#endif
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} Tree;
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/* a predicate is defined to be a predicate action and a token tree with
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* context info (if used); later, this struct may include the
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* "hoisting distance" when we hoist past tokens.
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*
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* A tree is used to indicate && vs ||
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*
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* p
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* |
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* q--r
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*
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* indicates p && (q||r).
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*
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* If expr is PRED_AND_LIST or PRED_OR_LIST, then it's an operation node
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* and indicates the start of an && or || list.
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*/
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typedef struct _Predicate {
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struct _Predicate *down, *right; /* these have to be first */
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struct _Predicate *up, *left; /* doubly-link me */
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char *expr;
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Tree *tcontext; /* used if lookahead depth of > one is needed (tree) */
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int k; /* lookahead depth for this tcontext */
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set scontext[2];/* used if lookahead depth of one is needed (set) */
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/* scontext[0] is not used; only needed so genExprSets()
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routine works (it expects an array)
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*/
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set completionTree; /* which lookahead depths are required to complete tcontext? */
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set completionSet; /* MR10 separate completion set for sets and trees */
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struct _PredEntry *predEntry; /* MR11 */
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#ifdef __cplusplus
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ActionNode *source; /* where did this predicate come from? */
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#else
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struct _anode *source; /* where did this predicate come from? */
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#endif
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char cloned; /* MR10 don't want to free original guard pred */
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char redundant; /* MR10 predicate tree simplification */
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char ampersandStyle; /* MR10 (g)? && <<p>>? */
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char inverted; /* MR11 ! predName */
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char isConst; /* MR11 */
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char constValue; /* MR11 */
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char conflictReported; /* MR11 */
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set plainSet; /* MR12b */
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/*** remember to change new_predicate() and predicate_dup() when changing this ***/
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} Predicate;
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typedef struct _ExceptionHandler {
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char *signalname;
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char *action;
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} ExceptionHandler;
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typedef struct _ExceptionGroup {
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struct _ListNode *handlers; /* list of ExceptionHandler's */
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char *label; /* label==""; implies not attached to any
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* particular rule ref.
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*/
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char *altID; /* which alt did it come from (blk#:alt#) */
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struct _ExceptionGroup *pendingLink; /* for alternative EG MR7 */
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struct _ExceptionGroup *outerEG; /* for alternative EG MR7 */
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struct _LabelEntry *labelEntry; /* for alternative EG MR7 */
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int forRule; /* MR7 */
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int used; /* MR7 */
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} ExceptionGroup ;
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#define TokenString(_i) ((TokenInd!=NULL)?TokenStr[TokenInd[_i]]:TokenStr[_i])
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#define ExprString(_i) ((TokenInd!=NULL)?ExprStr[TokenInd[_i]]:ExprStr[_i])
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/* M e s s a g e P a s s i n g T o N o d e s */
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/*
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* assumes a 'Junction *r' exists. This macro calls a function with
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* the pointer to the node to operate on and a pointer to the rule
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* in which it is enclosed.
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*/
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#define TRANS(p) {if ( (p)==NULL ) fatal("TRANS: NULL object"); \
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if ( (p)->ntype == nJunction ) (*(fpJTrans[((Junction *)(p))->jtype]))( p );\
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else (*(fpTrans[(p)->ntype]))( p );}
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#define PRINT(p) {if ( (p)==NULL ) fatal("PRINT: NULL object");\
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(*(fpPrint[(p)->ntype]))( p );}
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#define REACH(p,k,rk,a) {if ( (p)==NULL ) fatal("REACH: NULL object");\
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(a) = (*(fpReach[(p)->ntype]))( p, k, rk );}
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#define TRAV(p,k,rk,a) {if ( (p)==NULL ) {\
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if ( ContextGuardTRAV ) (a)=NULL; \
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else fatal("TRAV: NULL object");\
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} \
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else (a) = (*(fpTraverse[(p)->ntype]))( p, k, rk );}
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/**
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*** #define TRAV(p,k,rk,a) {if ( (p)==NULL ) fatal("TRAV: NULL object");\
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*** (a) = (*(fpTraverse[(p)->ntype]))( p, k, rk );}
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**/
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/* All syntax diagram nodes derive from Node -- superclass
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*/
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#ifdef __cplusplus
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class Node {
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public:
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NodeType ntype;
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char *rname; /* what rule does this element live in? */
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int file; /* index in FileStr */
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int line; /* line number that element occurs on */
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};
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#else
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typedef struct _node {
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NodeType ntype;
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char *rname; /* what rule does this element live in? */
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int file; /* index in FileStr */
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int line; /* line number that element occurs on */
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} Node;
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#endif
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#ifdef __cplusplus
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class ActionNode : public Node {
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public:
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#else
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typedef struct _anode {
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NodeType ntype;
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char *rname; /* what rule does this action live in? */
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int file; /* index in FileStr (name of file with action) */
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int line; /* line number that action occurs on */
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#endif
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Node *next;
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char *action;
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int is_predicate; /* true if action is a <<...>>? predicate action */
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int done; /* don't dump if action dumped (used for predicates) */
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int init_action; /* is this the 1st action of 1st prod of block? */
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char *pred_fail; /* what to do/print when predicate fails */
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Predicate *guardpred; /* if '(context)? =>' was present, already done */
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unsigned char frmwarned;/* have we dumped a warning for pred yet? */
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unsigned char ctxwarned;/* have we dumped a warning for pred yet? */
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unsigned char predTooLong; /* MR10 have we dumped warning for pred yet */
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unsigned char noHoist; /* MR12 literally "noHoist" */
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Predicate *ampersandPred; /* MR10 (g)? && <<p>>? expr */
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#ifdef __cplusplus
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Junction *guardNodes; /* MR11 */
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#else
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struct _junct *guardNodes; /* MR11 */
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#endif
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struct _PredEntry *predEntry; /* MR11 */
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int inverted; /* MR11 <<!predSymbol>>? */
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#ifdef __cplusplus
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};
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#else
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} ActionNode;
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#endif
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#ifdef __cplusplus
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class TokNode : public Node {
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public:
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#else
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typedef struct _toknode {
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NodeType ntype;
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char *rname; /* name of rule it's in */
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int file; /* index in FileStr (name of file with rule) */
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int line; /* line number that token occurs on */
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#endif
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Node *next;
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int token;
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int astnode; /* leaf/root/excluded (used to build AST's) */
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unsigned char label;/* token label or expression ? */
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unsigned char remapped;
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/* used if token id's are forced to certain positions;
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* a function walks the tree reassigning token numbers */
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int upper_range; /* MR13 - was char */
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/* used only if Token is of type T1..T2; in this case,
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* use token..upper_range as the range; else
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* upper_range must be 0 */
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unsigned char wild_card;
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/* indicates that the token is the "." wild-card;
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* field token is ignored if wild_card is set
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*/
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unsigned int elnum; /* element number within the alternative */
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#ifdef __cplusplus
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Junction *altstart; /* pointer to node that starts alt */
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#else
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struct _junct *altstart; /* pointer to node that starts alt */
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#endif
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struct _TCnode *tclass; /* token class if tokclass ref */
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set tset; /* set of tokens represented by meta token */
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char *el_label; /* el_label:toknode */
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unsigned char complement; /* complement the set? */
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ExceptionGroup *ex_group; /* any exception[el_label] attached? */
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unsigned char use_def_MT_handler;
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unsigned char label_used_in_semantic_pred; /* MR10 */
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#ifdef __cplusplus
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};
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#else
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} TokNode;
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#endif
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#ifdef __cplusplus
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class RuleRefNode : public Node {
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public:
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#else
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typedef struct _rrnode {
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NodeType ntype;
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char *rname; /* name of rule it's in */
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int file; /* index in FileStr (name of file with rule)
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it's in */
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int line; /* line number that rule ref occurs on */
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#endif
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Node *next;
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char *text; /* reference to which rule */
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char *parms; /* point to parameters of rule invocation
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(if present) */
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char *assign; /* point to left-hand-side of assignment
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(if any) */
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int linked; /* Has a FoLink already been established? */
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int astnode; /* excluded? (used to build AST's) */
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unsigned int elnum; /* element number within the alternative */
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#ifdef __cplusplus
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Junction *altstart;
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#else
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struct _junct *altstart;
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#endif
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char *el_label; /* el_label:rrnode */
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ExceptionGroup *ex_group; /* any exception[el_label] attached? */
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#ifdef __cplusplus
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};
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#else
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} RuleRefNode;
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#endif
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#ifdef __cplusplus
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class Junction : public Node {
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public:
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#else
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typedef struct _junct {
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NodeType ntype;
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char *rname; /* name of rule junction is in */
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int file; /* index in FileStr (name of file with rule)
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if blk == RuleBlk */
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int line; /* line number that rule occurs on */
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#endif
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int seq; /* MR10 sequence number */
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char ignore; /* used by FIRST computation to ignore
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empty alt added for the (...)+ blks */
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char visited; /* used by recursive routines to avoid
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infinite recursion */
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char pvisited; /* used by print routines to avoid
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infinite recursion */
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char fvisited; /* used by FoLink() to avoid
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infinite recursion */
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char *lock; /* used by REACH to track infinite recursion */
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char *pred_lock; /* used by find_predicates to track infinite recursion */
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int altnum; /* used in subblocks. altnum==0 means not an
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alt of subrule */
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int jtype; /* annotation for code-gen/FIRST/FOLLOW.
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Junction type */
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#ifdef __cplusplus
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Junction *end; /* pointer to node with EndBlk in it
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if blk == a block type */
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#else
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struct _junct *end; /* pointer to node with EndBlk in it
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if blk == a block type */
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#endif
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Node *p1, *p2;
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char halt; /* never move past a junction with halt==TRUE */ /* MR10 was int */
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char *pdecl; /* point to declaration of parameters on rule
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(if present) */
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char *parm; /* point to parameter of block invocation
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(if present) */
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char predparm; /* indicates that the 'parm' is a predicate
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* to be used in the while loop generated
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* for blocks */ /* MR10 was int */
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char *ret; /* point to return type of rule (if present) */
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char *erraction; /* point to error action (if present) */
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int blockid; /* this is a unique ID */
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char *exception_label; /* goto label for this alt */
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set *fset; /* used for code generation */
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Tree *ftree; /* used for code generation */
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Predicate *predicate;/* predicate that can be used to disambiguate */
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char guess; /* true if (...)? block */
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char alpha_beta_guess_end; /* MR14 1 => end block of guess sub block */
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Node *guess_analysis_point; /* MR14 */
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char approx; /* limit block to use linear approx lookahead? */
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set tokrefs; /* if ith element of alt is tokref then i is member */
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set rulerefs; /* if ith element of alt is rule ref then i is member */
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struct _ListNode *exceptions; /* list of exceptions groups for rule */
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struct _ListNode *el_labels; /* list of element labels for rule */
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ExceptionGroup *outerEG; /* MR7 */
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int curAltNum; /* MR7 */
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char* pFirstSetSymbol; /* #pragma FirstSetSymbol(Foo) MR21 */
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#ifdef __cplusplus
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Junction *pendingLink; /* MR7 */
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#else
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struct _junct *pendingLink; /* MR7 */
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#endif
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char overlap_warning; /* MR10 */
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#ifdef __cplusplus
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};
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#else
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} Junction;
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#endif
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typedef struct { Node *left, *right;} Graph;
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