/************************************************************
yymwork.c
This file can be freely modified for the generation of
custom code.

Copyright (c) 1999 Bumble-Bee Software Ltd.
************************************************************/

#include <string.h>
#include "myacc.h"

#ifdef YYPROTOTYPE
int YYCDECL yymwork(yymparse_t YYFAR *yy)
#else
int YYCDECL yymwork(yy)
yymparse_t YYFAR *yy;
#endif
{
	int errorpop = 0;
	yyassert(yy != NULL);
	yyassert(yymisfastparser(yy));	/* make sure it's a fast parser */

	while (1) {
		unsigned char type;
		short sr;
		yystack_t state = yympeek(yy);			/* get top state */

		while (1) {
			if (yy->yymstateaction[state].lookahead) {
				int index;
				if (!yy->yymlookahead) {
					yy->yymlookahead = 1;
					yy->yymchar = (*yy->yymgettoken)(yy);
					if (yy->yymchar < 0) {
						yy->yymchar = 0;
					}
#ifdef YYDEBUG
					yymdgettoken(yy, yy->yymchar);
#endif
				}
				index = yy->yymstateaction[state].base + yy->yymchar;
				if (index >= 0 && index < yy->yymtokenaction_size) {
					if (yy->yymtokenaction[index].check == state) {
						type = yy->yymtokenaction[index].type;
						sr = yy->yymtokenaction[index].sr;
						break;		/* escape from loop */
					}
				}
			}

			type = yy->yymstateaction[state].type;
			sr = yy->yymstateaction[state].sr;
			if (type != YYAT_DEFAULT) {
				break;		/* escape from loop */
			}
			state = sr;
		}

		/* action */
		switch (type) {
		case YYAT_SHIFT:
#ifdef YYDEBUG
			yymdshift(yy, yy->yymchar);
#endif
			if (yy->yymskip > 0) {
				yymsetskip(yy, yy->yymskip - 1);
			}
			if (!yympush(yy, sr)) {
#ifdef YYDEBUG
				yymdabort(yy);
#endif
				if (yy->yymwipeflg) {
					yymwipe(yy);	/* clean up */
				}
				return 1;
			}
			memcpy(&((char YYFAR *) yy->yymattributestackptr)[yy->yymtop *
				yy->yymattribute_size], yy->yymlvalptr, yy->yymattribute_size);
			yy->yymlookahead = 0;
			continue;		/* go to top of while loop */
		case YYAT_REDUCE:
#ifdef YYDEBUG
			yymdreduce(yy, sr);
#endif
			yy->yymretireflg = 0;
			if (yy->yymreduction[sr].action != -1) {
				/* user actions in here */
				if (yy->yymreduction[sr].length > 0) {
					memcpy(yy->yymvalptr, &((char YYFAR *) yy->yymattributestackptr)
						[(yy->yymtop + 1 - yy->yymreduction[sr].length) *
						yy->yymattribute_size], yy->yymattribute_size);
				}
        
				yy->yymerrorflg = 0;
				yy->yymexitflg = 0;
				(*yy->yymparseaction)(yy, yy->yymreduction[sr].action);

				/* check for special user requected actions */
				if (yy->yymexitflg) {
#ifdef YYDEBUG
					yymdexit(yy, yy->yymexitcode);
#endif
					return yy->yymexitcode;
				}
				if (yy->yymerrorflg) {
					errorpop = yy->yymerrorpop;
#ifdef YYDEBUG
					yymdthrowerror(yy, yy->yymerrorpop);
#endif
					yy->yymerrorcount++;
					break;		/* go to error handler */
				}
			}

			yympop(yy, yy->yymreduction[sr].length);
			{
				yystack_t state = yympeek(yy);	/* get top state */
				short next;

				int nonterm = yy->yymreduction[sr].nonterm;
				while (1) {
					int index = yy->yymstategoto[state].base + nonterm;
					if (index >= 0 && index < yy->yymnontermgoto_size) {
						if (yy->yymnontermgoto[index].check == state) {
							next = yy->yymnontermgoto[index].next;
							break;
						}
					}

					next = yy->yymstategoto[state].def;
					if (next == -1) {
						break;
					}
					state = next;
				}
				yyassert(next != -1);
    
				if (!yympush(yy, next)) {
#ifdef YYDEBUG
					yymdabort(yy);
#endif
					if (yy->yymwipeflg) {
						yymwipe(yy);	/* clean up */
					}
					return 1;
				}
			}
			if (yy->yymreduction[sr].action != -1) {
				memcpy(&((char YYFAR *) yy->yymattributestackptr)
					[yy->yymtop * yy->yymattribute_size],
					yy->yymvalptr, yy->yymattribute_size);
			}
			if (yy->yymretireflg) {
#ifdef YYDEBUG
				yymdretire(yy, yy->yymretirecode);
#endif
				return yy->yymretirecode;
			}
			continue;		/* go to top of while loop */
		case YYAT_ERROR:
#ifdef YYDEBUG
				yymdsyntaxerror(yy);
#endif
			if (yy->yymskip == 0) {
				yy->yymerrorcount++;
				(*yy->yymsyntaxerror)(yy);
			}
			break;		/* go to error handler */
		default:
			yyassert(type == YYAT_ACCEPT);
#ifdef YYDEBUG
			yymdaccept(yy);
#endif
			return 0;
		}

		/* error handler */
		if (yy->yymskip < 3 || errorpop > 0) {
#ifdef YYDEBUG
			yymdattemptrecovery(yy);
#endif
			yy->yympopflg = 0;		/* clear flag */
			while (1) {
				state = yympeek(yy);			/* get top state */
				while (1) {
					int index = yy->yymstateaction[state].base + YYTK_ERROR;
					if (index >= 0 && index < yy->yymtokenaction_size) {
						if (yy->yymtokenaction[index].check == state) {
							type = yy->yymtokenaction[index].type;
							sr = yy->yymtokenaction[index].sr;
							break;		/* escape from loop */
						}
					}

					type = yy->yymstateaction[state].type;
					sr = yy->yymstateaction[state].sr;
					if (type != YYAT_DEFAULT) {
						break;		/* escape from loop */
					}
					state = sr;
				}

				if (type == YYAT_SHIFT) {
					if (errorpop <= 0) {
#ifdef YYDEBUG
						yymdshift(yy, YYTK_ERROR);
#endif
						if (!yympush(yy, sr)) {
#ifdef YYDEBUG
							yymdabort(yy);
#endif
							if (yy->yymwipeflg) {
								yymwipe(yy);	/* clean up */
							}
							return 1;
						}
						yymsetskip(yy, 3);		/* skip 3 erroneous characters */
						break;
					}
					errorpop--;
				}

				yy->yympopflg = 1;

				/* clean up any symbol attributes */
				if (yy->yymdestructorptr != NULL) {
					int action;
					state = yympeek(yy);
					action = yy->yymdestructorptr[state];
					if (action != -1) {
						/* user actions in here */
						memcpy(yy->yymvalptr, &((char YYFAR *) yy->yymattributestackptr)
							[yy->yymtop * yy->yymattribute_size],
							yy->yymattribute_size);
        
						(*yy->yymparseaction)(yy, action);

						memcpy(&((char YYFAR *) yy->yymattributestackptr)
							[yy->yymtop * yy->yymattribute_size], yy->yymvalptr,
							yy->yymattribute_size);
					}
				}
				yympop(yy, 1);
				if (yy->yymtop < 0) {
#ifdef YYDEBUG
					yymdabort(yy);
#endif
					if (yy->yymwipeflg) {
						yymwipe(yy);	/* clean up */
					}
					return 1;
				}
			}
		}
		else {
			if (yy->yymlookahead) {
				if (yy->yymchar != 0) {
#ifdef YYDEBUG
					yymddiscard(yy, yy->yymchar);
#endif
					(*yy->yymdiscard)(yy, yy->yymchar);

					/* clean up any token attributes */
					if (yy->yymtokendestptr != NULL) {
						int index = yy->yymtokendestbase + yy->yymchar;
						if (index >= 0 && index < yy->yymtokendest_size) {
							int action = yy->yymtokendestptr[index];
							if (action != -1) {
								/* user actions in here */
								memcpy(yy->yymvalptr, yy->yymlvalptr, yy->yymattribute_size);

								(*yy->yymparseaction)(yy, action);

								memcpy(yy->yymlvalptr, yy->yymvalptr, yy->yymattribute_size);
							}
						}
					}

					yy->yymlookahead = 0;	/* skip erroneous character */
				}
				else {
#ifdef YYDEBUG
					yymdabort(yy);
#endif
					if (yy->yymwipeflg) {
						yymwipe(yy);	/* clean up */
					}
					return 1;
				}
			}
		}
	}
}