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- #if __STDC__ || defined(__cplusplus)
- #define _P_(s) s
- #else
- #define _P_(s) ()
- #endif
-
- #include <assert.h>
- #include <ctype.h>
- #include <stdio.h>
-
- #if __STDC__
- #include <stdlib.h>
- #include <stddef.h>
- #include <string.h>
- #include <limits.h>
-
- #ifdef _AMIGA
- #define AMIGA
- #endif
-
- #endif
-
- /* machine-dependent definitions */
- /* the following definitions are for the Tahoe */
- /* they might have to be changed for other machines */
-
- /* MAXCHAR is the largest unsigned character value */
- /* MAXSHORT is the largest value of a C short */
- /* MINSHORT is the most negative value of a C short */
- /* MAXTABLE is the maximum table size */
- /* BITS_PER_WORD is the number of bits in a C unsigned */
- /* WORDSIZE computes the number of words needed to */
- /* store n bits */
- /* BIT returns the value of the n-th bit starting */
- /* from r (0-indexed) */
- /* SETBIT sets the n-th bit starting from r */
-
- #ifdef AMIGA
- #define MAXCHAR UCHAR_MAX
- #define MAXSHORT SHRT_MAX
- #define MINSHORT SHRT_MIN
- #else
- #define MAXCHAR 255
- #define MAXSHORT 32767
- #define MINSHORT -32768
- #endif
- #define MAXTABLE 32500
- #define BITS_PER_WORD 32
- #define WORDSIZE(n) (((n)+(BITS_PER_WORD-1))/BITS_PER_WORD)
- #define BIT(r, n) ((((r)[(n)>>5])>>((n)&31))&1)
- #define SETBIT(r, n) ((r)[(n)>>5]|=((unsigned)1<<((n)&31)))
-
-
- /* character names */
-
- #define NUL '\0' /* the null character */
- #define NEWLINE '\n' /* line feed */
- #define SP ' ' /* space */
- #define BS '\b' /* backspace */
- #define HT '\t' /* horizontal tab */
- #define VT '\013' /* vertical tab */
- #define CR '\r' /* carriage return */
- #define FF '\f' /* form feed */
- #define QUOTE '\'' /* single quote */
- #define DOUBLE_QUOTE '\"' /* double quote */
- #define BACKSLASH '\\' /* backslash */
-
-
- /* defines for constructing filenames */
-
- #define CODE_SUFFIX 0
- #define DEFINES_SUFFIX 1
- #define OUTPUT_SUFFIX 2
- #define VERBOSE_SUFFIX 3
-
-
- /* keyword codes */
-
- #define TOKEN 0
- #define LEFT 1
- #define RIGHT 2
- #define NONASSOC 3
- #define MARK 4
- #define TEXT 5
- #define TYPE 6
- #define START 7
- #define UNION 8
- #define IDENT 9
-
-
- /* symbol classes */
-
- #define UNKNOWN 0
- #define TERM 1
- #define NONTERM 2
-
-
- /* the undefined value */
-
- #define UNDEFINED (-1)
-
-
- /* action codes */
-
- #define SHIFT 1
- #define REDUCE 2
-
-
- /* character macros */
-
- #define IS_IDENT(c) (isalnum(c) || (c) == '_' || (c) == '.' || (c) == '$')
- #define IS_OCTAL(c) ((c) >= '0' && (c) <= '7')
- #define NUMERIC_VALUE(c) ((c) - '0')
-
-
- /* symbol macros */
-
- #define ISTOKEN(s) ((s) < start_symbol)
- #define ISVAR(s) ((s) >= start_symbol)
-
-
- /* storage allocation macros */
-
- #define CALLOC(k,n) (my_calloc((unsigned)(k),(unsigned)(n)))
- #define FREE(x) (free((char*)(x)))
- #define MALLOC(n) (my_malloc((unsigned)(n)))
- #define NEW(t) ((t*)allocate(sizeof(t)))
- #define NEW2(n,t) ((t*)allocate((unsigned)((n)*sizeof(t))))
- #define REALLOC(p,n) (my_realloc((char*)(p),(unsigned)(n)))
-
-
- /* the structure of a symbol table entry */
-
- typedef struct bucket bucket;
- struct bucket
- {
- struct bucket *link;
- struct bucket *next;
- char *name;
- char *tag;
- short value;
- short index;
- short prec;
- char class;
- char assoc;
- };
-
-
- /* the structure of the LR(0) state machine */
-
- typedef struct core core;
- struct core
- {
- struct core *next;
- struct core *link;
- short number;
- short accessing_symbol;
- short nitems;
- short items[1];
- };
-
-
- /* the structure used to record shifts */
-
- typedef struct shifts shifts;
- struct shifts
- {
- struct shifts *next;
- short number;
- short nshifts;
- short shift[1];
- };
-
-
- /* the structure used to store reductions */
-
- typedef struct reductions reductions;
- struct reductions
- {
- struct reductions *next;
- short number;
- short nreds;
- short rules[1];
- };
-
-
- /* the structure used to represent parser actions */
-
- typedef struct action action;
- struct action
- {
- struct action *next;
- short symbol;
- short number;
- short prec;
- char action_code;
- char assoc;
- char suppressed;
- };
-
- /* target language is one of these */
- typedef enum { C, PERL } Language;
-
- /* global variables */
-
- extern char dflag;
- extern char lflag;
- extern char rflag;
- extern char tflag;
- extern char vflag;
-
- extern Language language;
-
- extern char *myname;
- extern char *cptr;
- extern char *line;
- extern int lineno;
- extern int outline;
-
- extern char **banner[];
- extern char **tables[];
- extern char **header[];
- extern char **body[];
- extern char **trailer[];
-
- extern int prefix_changed;
- extern char *define_prefix;
- extern char *symbol_prefix;
-
- extern char *action_file_name;
- extern char *code_file_name;
- extern char *defines_file_name;
- extern char *input_file_name;
- extern char *output_file_name;
- extern char *text_file_name;
- extern char *union_file_name;
- extern char *verbose_file_name;
-
- extern FILE *action_file;
- extern FILE *code_file;
- extern FILE *defines_file;
- extern FILE *input_file;
- extern FILE *output_file;
- extern FILE *text_file;
- extern FILE *union_file;
- extern FILE *verbose_file;
-
- extern int nitems;
- extern int nrules;
- extern int nsyms;
- extern int ntokens;
- extern int nvars;
- extern int ntags;
-
- extern char unionized;
- extern char line_format[];
-
- extern int start_symbol;
- extern char **symbol_name;
- extern short *symbol_value;
- extern short *symbol_prec;
- extern char *symbol_assoc;
-
- extern short *ritem;
- extern short *rlhs;
- extern short *rrhs;
- extern short *rprec;
- extern char *rassoc;
-
- extern short **derives;
- extern char *nullable;
-
- extern bucket *first_symbol;
- extern bucket *last_symbol;
-
- extern int nstates;
- extern core *first_state;
- extern shifts *first_shift;
- extern reductions *first_reduction;
- extern short *accessing_symbol;
- extern core **state_table;
- extern shifts **shift_table;
- extern reductions **reduction_table;
- extern unsigned *LA;
- extern short *LAruleno;
- extern short *lookaheads;
- extern short *goto_map;
- extern short *from_state;
- extern short *to_state;
-
- extern action **parser;
- extern int SRtotal;
- extern int RRtotal;
- extern short *SRconflicts;
- extern short *RRconflicts;
- extern short *defred;
- extern short *rules_used;
- extern short nunused;
- extern short final_state;
-
- /* global functions */
-
- extern char * allocate _P_((unsigned n));
- extern void closure _P_((short *nucleus, int n));
- extern void create_symbol_table _P_((void));
- extern void default_action_warning _P_((void));
- extern void dollar_error _P_((int a_lineno, char *a_line, char *a_cptr));
- extern void dollar_warning _P_((int a_lineno, int i));
- extern void done _P_((int k));
- extern void fatal _P_((char *msg));
- extern void finalize_closure _P_((void));
- extern void free_derives _P_((void));
- extern void free_nullable _P_((void));
- extern void free_parser _P_((void));
- extern void free_symbol_table _P_((void));
- extern void free_symbols _P_((void));
- extern void illegal_character _P_((char *c_cptr));
- extern void illegal_tag _P_((int t_lineno, char *t_line, char *t_cptr));
- extern void lalr _P_((void));
- extern bucket * lookup _P_((char *name));
- extern void lr0 _P_((void));
- extern bucket * make_bucket _P_((char *name));
- extern void make_parser _P_((void));
- extern char * my_calloc _P_((unsigned k, unsigned n));
- extern char * my_malloc _P_((unsigned n));
- extern char * my_realloc _P_((char *p, unsigned n));
- extern void no_grammar _P_((void));
- extern void no_space _P_((void));
- extern void open_error _P_((char *filename));
- extern void output _P_((void));
- extern void over_unionized _P_((char *u_cptr));
- extern void prec_redeclared _P_((void));
- extern void print_pos _P_((char *st_line, char *st_cptr));
- extern void reader _P_((void));
- extern void reflexive_transitive_closure _P_((unsigned *R, int n));
- extern void reprec_warning _P_((char *s));
- extern void restarted_warning _P_((void));
- extern void retyped_warning _P_((char *s));
- extern void revalued_warning _P_((char *s));
- extern void set_first_derives _P_((void));
- extern void syntax_error _P_((int st_lineno, char *st_line, char *st_cptr));
- extern void terminal_lhs _P_((int s_lineno));
- extern void terminal_start _P_((char *s));
- extern void tokenized_start _P_((char *s));
- extern void undefined_goal _P_((char *s));
- extern void undefined_symbol_warning _P_((char *s));
- extern void unexpected_EOF _P_((void));
- extern void unknown_rhs _P_((int i));
- extern void unterminated_action _P_((int a_lineno, char *a_line, char *a_cptr));
- extern void unterminated_comment _P_((int c_lineno, char *c_line, char *c_cptr));
- extern void unterminated_string _P_((int s_lineno, char *s_line, char *s_cptr));
- extern void unterminated_text _P_((int t_lineno, char *t_line, char *t_cptr));
- extern void unterminated_union _P_((int u_lineno, char *u_line, char *u_cptr));
- extern void untyped_lhs _P_((void));
- extern void untyped_rhs _P_((int i, char *s));
- extern void used_reserved _P_((char *s));
- extern void verbose _P_((void));
- extern void write_section _P_((char **section[]));
-
- /* system variables */
-
- extern int errno;
-
-
- /* system functions */
-
- #if __STDC__ != 1
- extern void free();
- extern char *strcpy();
- extern char *strrchr();
- #endif
-