Annotation of src/usr.bin/yacc/defs.h, Revision 1.19
1.19 ! espie 1: /* $OpenBSD: defs.h,v 1.18 2014/12/02 15:56:22 millert Exp $ */
1.5 deraadt 2: /* $NetBSD: defs.h,v 1.6 1996/03/19 03:21:30 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1989 The Regents of the University of California.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Robert Paul Corbett.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
1.10 millert 19: * 3. Neither the name of the University nor the names of its contributors
1.5 deraadt 20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)defs.h 5.6 (Berkeley) 5/24/93
36: */
1.1 deraadt 37:
38: #include <assert.h>
39: #include <ctype.h>
40: #include <stdio.h>
41: #include <string.h>
1.7 pvalchev 42: #include <stdlib.h>
1.1 deraadt 43:
44: /* machine-dependent definitions */
45: /* the following definitions are for the Tahoe */
46: /* they might have to be changed for other machines */
47:
48: /* MAXCHAR is the largest unsigned character value */
49: /* MAXSHORT is the largest value of a C short */
50: /* MINSHORT is the most negative value of a C short */
51: /* MAXTABLE is the maximum table size */
52: /* BITS_PER_WORD is the number of bits in a C unsigned */
53: /* WORDSIZE computes the number of words needed to */
54: /* store n bits */
55: /* BIT returns the value of the n-th bit starting */
56: /* from r (0-indexed) */
57: /* SETBIT sets the n-th bit starting from r */
58:
59: #define MAXCHAR 255
60: #define MAXSHORT 32767
61: #define MINSHORT -32768
62: #define MAXTABLE 32500
63: #define BITS_PER_WORD 32
64: #define WORDSIZE(n) (((n)+(BITS_PER_WORD-1))/BITS_PER_WORD)
65: #define BIT(r, n) ((((r)[(n)>>5])>>((n)&31))&1)
66: #define SETBIT(r, n) ((r)[(n)>>5]|=((unsigned)1<<((n)&31)))
67:
68:
69: /* character names */
70:
71: #define NUL '\0' /* the null character */
72: #define NEWLINE '\n' /* line feed */
73: #define SP ' ' /* space */
74: #define BS '\b' /* backspace */
75: #define HT '\t' /* horizontal tab */
76: #define VT '\013' /* vertical tab */
77: #define CR '\r' /* carriage return */
78: #define FF '\f' /* form feed */
79: #define QUOTE '\'' /* single quote */
80: #define DOUBLE_QUOTE '\"' /* double quote */
81: #define BACKSLASH '\\' /* backslash */
82:
83:
84: /* defines for constructing filenames */
85:
86: #define CODE_SUFFIX ".code.c"
87: #define DEFINES_SUFFIX ".tab.h"
88: #define OUTPUT_SUFFIX ".tab.c"
89: #define VERBOSE_SUFFIX ".output"
90:
91:
92: /* keyword codes */
93:
94: #define TOKEN 0
95: #define LEFT 1
96: #define RIGHT 2
97: #define NONASSOC 3
98: #define MARK 4
99: #define TEXT 5
100: #define TYPE 6
101: #define START 7
102: #define UNION 8
103: #define IDENT 9
1.2 etheisen 104: #define EXPECT 10
1.1 deraadt 105:
106:
107: /* symbol classes */
108:
109: #define UNKNOWN 0
110: #define TERM 1
111: #define NONTERM 2
112:
113:
114: /* the undefined value */
115:
116: #define UNDEFINED (-1)
117:
118:
119: /* action codes */
120:
121: #define SHIFT 1
122: #define REDUCE 2
123:
124:
125: /* character macros */
126:
127: #define IS_IDENT(c) (isalnum(c) || (c) == '_' || (c) == '.' || (c) == '$')
128: #define NUMERIC_VALUE(c) ((c) - '0')
129:
130:
131: /* symbol macros */
132:
133: #define ISTOKEN(s) ((s) < start_symbol)
134: #define ISVAR(s) ((s) >= start_symbol)
135:
136:
137: /* storage allocation macros */
138:
1.15 millert 139: #define NEW(t) ((t*)allocate(sizeof(t)))
140: #define NEW2(n,t) ((t*)allocate((n)*sizeof(t)))
1.1 deraadt 141:
142:
143: /* the structure of a symbol table entry */
144:
145: typedef struct bucket bucket;
1.17 tedu 146: struct bucket {
147: struct bucket *link;
148: struct bucket *next;
149: char *name;
150: char *tag;
151: short value;
152: short index;
153: short prec;
154: char class;
155: char assoc;
1.1 deraadt 156: };
157:
158:
159: /* the structure of the LR(0) state machine */
160:
161: typedef struct core core;
1.17 tedu 162: struct core {
163: struct core *next;
164: struct core *link;
165: short number;
166: short accessing_symbol;
167: short nitems;
168: short items[1];
1.1 deraadt 169: };
170:
171:
172: /* the structure used to record shifts */
173:
174: typedef struct shifts shifts;
1.17 tedu 175: struct shifts {
176: struct shifts *next;
177: short number;
178: short nshifts;
179: short shift[1];
1.1 deraadt 180: };
181:
182:
183: /* the structure used to store reductions */
184:
185: typedef struct reductions reductions;
1.17 tedu 186: struct reductions {
187: struct reductions *next;
188: short number;
189: short nreds;
190: short rules[1];
1.1 deraadt 191: };
192:
193:
194: /* the structure used to represent parser actions */
195:
196: typedef struct action action;
1.17 tedu 197: struct action {
198: struct action *next;
199: short symbol;
200: short number;
201: short prec;
202: char action_code;
203: char assoc;
204: char suppressed;
1.1 deraadt 205: };
206:
207:
208: /* global variables */
209:
210: extern char dflag;
211: extern char lflag;
212: extern char rflag;
213: extern char tflag;
214: extern char vflag;
215: extern char *symbol_prefix;
216:
217: extern char *cptr;
218: extern char *line;
219: extern int lineno;
220: extern int outline;
221:
222: extern char *banner[];
223: extern char *tables[];
224: extern char *header[];
225: extern char *body[];
226: extern char *trailer[];
227:
228: extern char *code_file_name;
229: extern char *defines_file_name;
230: extern char *input_file_name;
231: extern char *output_file_name;
232: extern char *verbose_file_name;
233:
234: extern FILE *action_file;
235: extern FILE *code_file;
236: extern FILE *defines_file;
237: extern FILE *input_file;
238: extern FILE *output_file;
239: extern FILE *text_file;
240: extern FILE *union_file;
241: extern FILE *verbose_file;
242:
243: extern int nitems;
244: extern int nrules;
245: extern int nsyms;
246: extern int ntokens;
247: extern int nvars;
248: extern int ntags;
249:
250: extern char unionized;
251: extern char line_format[];
252:
253: extern int start_symbol;
254: extern char **symbol_name;
255: extern short *symbol_value;
256: extern short *symbol_prec;
257: extern char *symbol_assoc;
258:
259: extern short *ritem;
260: extern short *rlhs;
261: extern short *rrhs;
262: extern short *rprec;
263: extern char *rassoc;
264:
265: extern short **derives;
266: extern char *nullable;
267:
268: extern bucket *first_symbol;
269: extern bucket *last_symbol;
270:
271: extern int nstates;
272: extern core *first_state;
273: extern shifts *first_shift;
274: extern reductions *first_reduction;
275: extern short *accessing_symbol;
276: extern core **state_table;
277: extern shifts **shift_table;
278: extern reductions **reduction_table;
279: extern unsigned *LA;
280: extern short *LAruleno;
281: extern short *lookaheads;
282: extern short *goto_map;
283: extern short *from_state;
284: extern short *to_state;
285:
286: extern action **parser;
287: extern int SRtotal;
1.2 etheisen 288: extern int SRexpect;
1.1 deraadt 289: extern int RRtotal;
290: extern short *SRconflicts;
291: extern short *RRconflicts;
292: extern short *defred;
293: extern short *rules_used;
294: extern short nunused;
295: extern short final_state;
296:
297: /* global functions */
298:
1.14 millert 299: extern void *allocate(size_t);
300: extern bucket *lookup(char *);
301: extern bucket *make_bucket(char *);
1.9 millert 302: extern void set_first_derives(void);
303: extern void closure(short *, int);
304: extern void finalize_closure(void);
1.7 pvalchev 305:
1.18 millert 306: extern __dead void fatal(char *);
1.7 pvalchev 307:
1.9 millert 308: extern void reflexive_transitive_closure(unsigned *, int);
1.18 millert 309: extern __dead void done(int);
1.7 pvalchev 310:
1.18 millert 311: extern __dead void no_space(void);
312: extern __dead void open_error(char *);
1.19 ! espie 313: extern __dead void tempfile_error(void);
1.18 millert 314: extern __dead void open_write_error(char *);
315: extern __dead void unexpected_EOF(void);
1.9 millert 316: extern void print_pos(char *, char *);
1.18 millert 317: extern __dead void syntax_error(int, char *, char *);
318: extern __dead void unterminated_comment(int, char *, char *);
319: extern __dead void unterminated_string(int, char *, char *);
320: extern __dead void unterminated_text(int, char *, char *);
321: extern __dead void unterminated_union(int, char *, char *);
322: extern __dead void over_unionized(char *);
323: extern __dead void illegal_tag(int, char *, char *);
324: extern __dead void illegal_character(char *);
325: extern __dead void used_reserved(char *);
326: extern __dead void tokenized_start(char *);
1.9 millert 327: extern void retyped_warning(char *);
328: extern void reprec_warning(char *);
329: extern void revalued_warning(char *);
1.18 millert 330: extern __dead void terminal_start(char *);
1.9 millert 331: extern void restarted_warning(void);
1.18 millert 332: extern __dead void no_grammar(void);
333: extern __dead void terminal_lhs(int);
1.9 millert 334: extern void prec_redeclared(void);
1.18 millert 335: extern __dead void unterminated_action(int, char *, char *);
1.9 millert 336: extern void dollar_warning(int, int);
1.18 millert 337: extern __dead void dollar_error(int, char *, char *);
338: extern __dead void untyped_lhs(void);
339: extern __dead void untyped_rhs(int, char *);
340: extern __dead void unknown_rhs(int);
1.9 millert 341: extern void default_action_warning(void);
1.18 millert 342: extern __dead void undefined_goal(char *);
1.9 millert 343: extern void undefined_symbol_warning(char *);
344:
345: extern void lalr(void);
346:
347: extern void reader(void);
348: extern void lr0(void);
1.12 nicm 349: extern void free_nullable(void);
350: extern void free_derives(void);
1.9 millert 351: extern void make_parser(void);
352: extern void verbose(void);
353: extern void output(void);
354: extern void free_parser(void);
355: extern void write_section(char *[]);
356:
357: extern void create_symbol_table(void);
358: extern void free_symbol_table(void);
359: extern void free_symbols(void);
1.1 deraadt 360:
361:
362: /* system variables */
363:
1.6 millert 364: extern char *__progname;
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