Annotation of src/usr.bin/yacc/defs.h, Revision 1.14
1.14 ! millert 1: /* $OpenBSD: defs.h,v 1.13 2014/01/08 21:40:25 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 IS_OCTAL(c) ((c) >= '0' && (c) <= '7')
129: #define NUMERIC_VALUE(c) ((c) - '0')
130:
131:
132: /* symbol macros */
133:
134: #define ISTOKEN(s) ((s) < start_symbol)
135: #define ISVAR(s) ((s) >= start_symbol)
136:
137:
138: /* storage allocation macros */
139:
1.14 ! millert 140: #define NEW(t) (allocate(sizeof(t)))
! 141: #define NEW2(n,t) (allocate((n)*sizeof(t)))
1.1 deraadt 142:
143:
144: /* the structure of a symbol table entry */
145:
146: typedef struct bucket bucket;
147: struct bucket
148: {
149: struct bucket *link;
150: struct bucket *next;
151: char *name;
152: char *tag;
153: short value;
154: short index;
155: short prec;
156: char class;
157: char assoc;
158: };
159:
160:
161: /* the structure of the LR(0) state machine */
162:
163: typedef struct core core;
164: struct core
165: {
166: struct core *next;
167: struct core *link;
168: short number;
169: short accessing_symbol;
170: short nitems;
171: short items[1];
172: };
173:
174:
175: /* the structure used to record shifts */
176:
177: typedef struct shifts shifts;
178: struct shifts
179: {
180: struct shifts *next;
181: short number;
182: short nshifts;
183: short shift[1];
184: };
185:
186:
187: /* the structure used to store reductions */
188:
189: typedef struct reductions reductions;
190: struct reductions
191: {
192: struct reductions *next;
193: short number;
194: short nreds;
195: short rules[1];
196: };
197:
198:
199: /* the structure used to represent parser actions */
200:
201: typedef struct action action;
202: struct action
203: {
204: struct action *next;
205: short symbol;
206: short number;
207: short prec;
208: char action_code;
209: char assoc;
210: char suppressed;
211: };
212:
213:
214: /* global variables */
215:
216: extern char dflag;
217: extern char lflag;
218: extern char rflag;
219: extern char tflag;
220: extern char vflag;
221: extern char *symbol_prefix;
222:
223: extern char *cptr;
224: extern char *line;
225: extern int lineno;
226: extern int outline;
227:
228: extern char *banner[];
229: extern char *tables[];
230: extern char *header[];
231: extern char *body[];
232: extern char *trailer[];
233:
234: extern char *action_file_name;
235: extern char *code_file_name;
236: extern char *defines_file_name;
237: extern char *input_file_name;
238: extern char *output_file_name;
239: extern char *text_file_name;
240: extern char *union_file_name;
241: extern char *verbose_file_name;
242:
243: extern FILE *action_file;
244: extern FILE *code_file;
245: extern FILE *defines_file;
246: extern FILE *input_file;
247: extern FILE *output_file;
248: extern FILE *text_file;
249: extern FILE *union_file;
250: extern FILE *verbose_file;
251:
252: extern int nitems;
253: extern int nrules;
254: extern int nsyms;
255: extern int ntokens;
256: extern int nvars;
257: extern int ntags;
258:
259: extern char unionized;
260: extern char line_format[];
261:
262: extern int start_symbol;
263: extern char **symbol_name;
264: extern short *symbol_value;
265: extern short *symbol_prec;
266: extern char *symbol_assoc;
267:
268: extern short *ritem;
269: extern short *rlhs;
270: extern short *rrhs;
271: extern short *rprec;
272: extern char *rassoc;
273:
274: extern short **derives;
275: extern char *nullable;
276:
277: extern bucket *first_symbol;
278: extern bucket *last_symbol;
279:
280: extern int nstates;
281: extern core *first_state;
282: extern shifts *first_shift;
283: extern reductions *first_reduction;
284: extern short *accessing_symbol;
285: extern core **state_table;
286: extern shifts **shift_table;
287: extern reductions **reduction_table;
288: extern unsigned *LA;
289: extern short *LAruleno;
290: extern short *lookaheads;
291: extern short *goto_map;
292: extern short *from_state;
293: extern short *to_state;
294:
295: extern action **parser;
296: extern int SRtotal;
1.2 etheisen 297: extern int SRexpect;
1.1 deraadt 298: extern int RRtotal;
299: extern short *SRconflicts;
300: extern short *RRconflicts;
301: extern short *defred;
302: extern short *rules_used;
303: extern short nunused;
304: extern short final_state;
305:
306: /* global functions */
307:
1.14 ! millert 308: extern void *allocate(size_t);
! 309: extern bucket *lookup(char *);
! 310: extern bucket *make_bucket(char *);
1.9 millert 311: extern void set_first_derives(void);
312: extern void closure(short *, int);
313: extern void finalize_closure(void);
1.7 pvalchev 314:
1.9 millert 315: extern void fatal(char *);
1.7 pvalchev 316:
1.9 millert 317: extern void reflexive_transitive_closure(unsigned *, int);
318: extern void done(int);
1.7 pvalchev 319:
1.9 millert 320: extern void no_space(void);
1.7 pvalchev 321: extern void open_error(char *);
1.11 pvalchev 322: extern void open_write_error(char *);
1.9 millert 323: extern void unexpected_EOF(void);
324: extern void print_pos(char *, char *);
325: extern void syntax_error(int, char *, char *);
326: extern void unterminated_comment(int, char *, char *);
327: extern void unterminated_string(int, char *, char *);
328: extern void unterminated_text(int, char *, char *);
329: extern void unterminated_union(int, char *, char *);
330: extern void over_unionized(char *);
331: extern void illegal_tag(int, char *, char *);
332: extern void illegal_character(char *);
333: extern void used_reserved(char *);
334: extern void tokenized_start(char *);
335: extern void retyped_warning(char *);
336: extern void reprec_warning(char *);
337: extern void revalued_warning(char *);
338: extern void terminal_start(char *);
339: extern void restarted_warning(void);
340: extern void no_grammar(void);
341: extern void terminal_lhs(int);
342: extern void prec_redeclared(void);
343: extern void unterminated_action(int, char *, char *);
344: extern void dollar_warning(int, int);
345: extern void dollar_error(int, char *, char *);
346: extern void untyped_lhs(void);
347: extern void untyped_rhs(int, char *);
348: extern void unknown_rhs(int);
349: extern void default_action_warning(void);
350: extern void undefined_goal(char *);
351: extern void undefined_symbol_warning(char *);
352:
353: extern void lalr(void);
354:
355: extern void reader(void);
356: extern void lr0(void);
1.12 nicm 357: extern void free_nullable(void);
358: extern void free_derives(void);
1.9 millert 359: extern void make_parser(void);
360: extern void verbose(void);
361: extern void output(void);
362: extern void free_parser(void);
363: extern void write_section(char *[]);
364:
365: extern void create_symbol_table(void);
366: extern void free_symbol_table(void);
367: extern void free_symbols(void);
1.1 deraadt 368:
369:
370: /* system variables */
371:
1.6 millert 372: extern char *__progname;
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