--- /dev/null
+/* ANTLRParser.h
+ *
+ * Define the generic ANTLRParser superclass, which is subclassed to
+ * define an actual parser.
+ *
+ * Before entry into this file: ANTLRTokenType must be set.
+ *
+ * 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
+ * 1989-1995
+ */
+
+#ifndef APARSER_H_GATE
+#define APARSER_H_GATE
+
+#include <stdio.h>
+#include <setjmp.h>
+#include "config.h"
+#include ATOKEN_H
+#include ATOKENBUFFER_H
+
+#ifdef ZZCAN_GUESS
+#ifndef ZZINF_LOOK
+#define ZZINF_LOOK
+#endif
+#endif
+
+
+#define NLA (token_type[lap&(LLk-1)])/* --> next LA */
+
+typedef unsigned char SetWordType;
+
+/* Define external bit set stuff (for SetWordType) */
+#define EXT_WORDSIZE (sizeof(char)*8)
+#define EXT_LOGWORDSIZE 3
+
+ /* s y n t a c t i c p r e d i c a t e s t u f f */
+
+typedef struct _zzjmp_buf {
+ jmp_buf state;
+ } zzjmp_buf;
+
+/* these need to be macros not member functions */
+#define zzGUESS_BLOCK ANTLRParserState zzst; int zzrv; int _marker;
+#define zzNON_GUESS_MODE if ( !guessing )
+#define zzGUESS_FAIL guess_fail();
+#define zzGUESS_DONE {zzrv=1; inputTokens->rewind(_marker); guess_done(&zzst);}
+#define zzGUESS saveState(&zzst); \
+ guessing = 1; \
+ _marker = inputTokens->mark(); \
+ zzrv = setjmp(guess_start.state); \
+ if ( zzrv ) zzGUESS_DONE
+
+ /* a n t l r p a r s e r d e f */
+
+struct ANTLRParserState {
+ /* class variables */
+ zzjmp_buf guess_start;
+ int guessing;
+
+ int inf_labase;
+ int inf_last;
+
+ int dirty;
+};
+
+/* notes:
+ *
+ * multiple inheritance is a cool way to include what stuff is needed
+ * in this structure (like guess stuff). however, i'm not convinced that
+ * multiple inheritance works correctly on all platforms. not that
+ * much space is used--just include all possibly useful members.
+ *
+ * the class should also be a template with arguments for the lookahead
+ * depth and so on. that way, more than one parser can be defined (as
+ * each will probably have different lookahead requirements). however,
+ * am i sure that templates work? no, i'm not sure.
+ *
+ * no attributes are maintained and, hence, the 'asp' variable is not
+ * needed. $i can still be referenced, but it refers to the token
+ * associated with that rule element. question: where are the token's
+ * stored if not on the software stack? in local variables created
+ * and assigned to by antlr.
+ */
+class ANTLRParser {
+protected:
+ /* class variables */
+ static SetWordType bitmask[sizeof(SetWordType)*8];
+ static char eMsgBuffer[500];
+
+protected:
+ int LLk; // number of lookahead symbols (old LL_K)
+ int demand_look;
+ ANTLRTokenType eofToken; // when do I stop during resynch()s
+ int bsetsize; // size of bitsets created by ANTLR in
+ // units of SetWordType
+
+ ANTLRTokenBuffer *inputTokens; //place to get input tokens
+
+ zzjmp_buf guess_start; // where to jump back to upon failure
+ int guessing; // if guessing (using (...)? predicate)
+
+ // infinite lookahead stuff
+ int can_use_inf_look; // set by subclass (generated by ANTLR)
+ int inf_lap;
+ int inf_labase;
+ int inf_last;
+ int *_inf_line;
+
+ ANTLRChar **token_tbl; // pointer to table of token type strings
+
+ int dirty; // used during demand lookahead
+
+ ANTLRTokenType *token_type; // fast reference cache of token.getType()
+// ANTLRLightweightToken **token; // the token with all its attributes
+ int lap;
+ int labase;
+
+private:
+ void fill_inf_look();
+
+protected:
+ void guess_fail() { longjmp(guess_start.state, 1); }
+ void guess_done(ANTLRParserState *st){ restoreState(st); }
+ int guess(ANTLRParserState *);
+ void look(int);
+ int _match(ANTLRTokenType, ANTLRChar **, ANTLRTokenType *,
+ _ANTLRTokenPtr *, SetWordType **);
+ int _setmatch(SetWordType *, ANTLRChar **, ANTLRTokenType *,
+ _ANTLRTokenPtr *, SetWordType **);
+ int _match_wsig(ANTLRTokenType);
+ int _setmatch_wsig(SetWordType *);
+ virtual void consume();
+ void resynch(SetWordType *wd,SetWordType mask);
+ void prime_lookahead();
+ virtual void tracein(char *r)
+ {
+ fprintf(stderr, "enter rule \"%s\"\n", r);
+ }
+ virtual void traceout(char *r)
+ {
+ fprintf(stderr, "exit rule \"%s\"\n", r);
+ }
+ unsigned MODWORD(unsigned x) {return x & (EXT_WORDSIZE-1);} // x % EXT_WORDSIZE
+ unsigned DIVWORD(unsigned x) {return x >> EXT_LOGWORDSIZE;} // x / EXT_WORDSIZE
+ int set_deg(SetWordType *);
+ int set_el(ANTLRTokenType, SetWordType *);
+ void edecode(SetWordType *);
+ void FAIL(int k, ...);
+
+public:
+ ANTLRParser(ANTLRTokenBuffer *,
+ int k=1,
+ int use_inf_look=0,
+ int demand_look=0,
+ int bsetsize=1);
+ virtual ~ANTLRParser();
+
+ virtual void init();
+
+ ANTLRTokenType LA(int i)
+ {
+ return demand_look ? token_type[(labase+(i)-1)&(LLk-1)] :
+ token_type[(lap+(i)-1)&(LLk-1)];
+ }
+ _ANTLRTokenPtr LT(int i);
+
+ void setEofToken(ANTLRTokenType t) { eofToken = t; }
+
+ void noGarbageCollectTokens() { inputTokens->noGarbageCollectTokens(); }
+ void garbageCollectTokens() { inputTokens->garbageCollectTokens(); }
+
+ virtual void syn(_ANTLRTokenPtr tok, ANTLRChar *egroup,
+ SetWordType *eset, ANTLRTokenType etok, int k);
+ void saveState(ANTLRParserState *);
+ void restoreState(ANTLRParserState *);
+
+ virtual void panic(char *msg);
+ static char *eMsgd(char *,int);
+ static char *eMsg(char *,char *);
+ static char *eMsg2(char *,char *,char *);
+
+ void consumeUntil(SetWordType *st);
+ void consumeUntilToken(int t);
+
+ virtual int _setmatch_wdfltsig(SetWordType *tokensWanted,
+ ANTLRTokenType tokenTypeOfSet,
+ SetWordType *whatFollows);
+ virtual int _match_wdfltsig(ANTLRTokenType tokenWanted,
+ SetWordType *whatFollows);
+};
+
+
+#define zzmatch(_t) \
+ if ( !_match((ANTLRTokenType)_t, &zzMissText, &zzMissTok, \
+ (_ANTLRTokenPtr *) &zzBadTok, &zzMissSet) ) goto fail;
+
+#define zzmatch_wsig(_t,handler) \
+ if ( !_match_wsig((ANTLRTokenType)_t) ) if ( guessing ) goto fail; else {_signal=MismatchedToken; goto handler;}
+
+#define zzsetmatch(_ts) \
+ if ( !_setmatch(_ts, &zzMissText, &zzMissTok, \
+ (_ANTLRTokenPtr *) &zzBadTok, &zzMissSet) ) goto fail;
+
+#define zzsetmatch_wsig(_ts, handler) \
+ if ( !_setmatch_wsig(_ts) ) if ( guessing ) goto fail; else {_signal=MismatchedToken; goto handler;}
+
+/* For the dflt signal matchers, a FALSE indicates that an error occurred
+ * just like the other matchers, but in this case, the routine has already
+ * recovered--we do NOT want to consume another token. However, when
+ * the match was successful, we do want to consume hence _signal=0 so that
+ * a token is consumed by the "if (!_signal) consume(); _signal=NoSignal;"
+ * preamble.
+ */
+#define zzsetmatch_wdfltsig(tokensWanted, tokenTypeOfSet, whatFollows) \
+ if ( !_setmatch_wdfltsig(tokensWanted, tokenTypeOfSet, whatFollows) ) \
+ _signal = MismatchedToken;
+
+#define zzmatch_wdfltsig(tokenWanted, whatFollows) \
+ if ( !_match_wdfltsig(tokenWanted, whatFollows) ) _signal = MismatchedToken;
+
+
+#ifndef zzfailed_pred
+#define zzfailed_pred(_p) \
+ zzNON_GUESS_MODE { fprintf(stderr, "line %d: semantic error; failed predicate: '%s'\n",LT(1)->getLine(), _p); }
+#endif
+
+#define zzRULE \
+ SetWordType *zzMissSet=NULL; ANTLRTokenType zzMissTok=(ANTLRTokenType)0; \
+ _ANTLRTokenPtr zzBadTok; ANTLRChar *zzBadText=(ANTLRChar *)""; \
+ int zzErrk=1; \
+ ANTLRChar *zzMissText=(ANTLRChar *)"";
+
+#endif
+
+ /* S t a n d a r d E x c e p t i o n S i g n a l s */
+
+#define NoSignal 0
+#define MismatchedToken 1
+#define NoViableAlt 2
+#define NoSemViableAlt 3
projects / pccts / blobdiff