1 c734c0e9 2021-08-03 op /*
  2 c734c0e9 2021-08-03 op  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
  3 c734c0e9 2021-08-03 op  * Copyright (c) 2018 Florian Obser <florian@openbsd.org>
  4 c734c0e9 2021-08-03 op  * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
  5 c734c0e9 2021-08-03 op  * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
  6 c734c0e9 2021-08-03 op  * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
  7 c734c0e9 2021-08-03 op  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
  8 c734c0e9 2021-08-03 op  * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
  9 c734c0e9 2021-08-03 op  * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
 10 c734c0e9 2021-08-03 op  *
 11 c734c0e9 2021-08-03 op  * Permission to use, copy, modify, and distribute this software for any
 12 c734c0e9 2021-08-03 op  * purpose with or without fee is hereby granted, provided that the above
 13 c734c0e9 2021-08-03 op  * copyright notice and this permission notice appear in all copies.
 14 c734c0e9 2021-08-03 op  *
 15 c734c0e9 2021-08-03 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 16 c734c0e9 2021-08-03 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 17 c734c0e9 2021-08-03 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 18 c734c0e9 2021-08-03 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 19 c734c0e9 2021-08-03 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 20 c734c0e9 2021-08-03 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 21 c734c0e9 2021-08-03 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 22 c734c0e9 2021-08-03 op  */
 23 c734c0e9 2021-08-03 op 
 24 c734c0e9 2021-08-03 op %{
 25 c734c0e9 2021-08-03 op 
 26 c734c0e9 2021-08-03 op #include "compat.h"
 27 c734c0e9 2021-08-03 op 
 28 c734c0e9 2021-08-03 op #include <ctype.h>
 29 c734c0e9 2021-08-03 op #include <inttypes.h>
 30 c734c0e9 2021-08-03 op #include <limits.h>
 31 c734c0e9 2021-08-03 op #include <stdio.h>
 32 c734c0e9 2021-08-03 op #include <stdlib.h>
 33 c734c0e9 2021-08-03 op #include <string.h>
 34 c734c0e9 2021-08-03 op #include <syslog.h>
 35 c734c0e9 2021-08-03 op 
 36 c734c0e9 2021-08-03 op #include "log.h"
 37 c734c0e9 2021-08-03 op #include "kamid.h"
 38 c734c0e9 2021-08-03 op #include "utils.h"
 39 c734c0e9 2021-08-03 op 
 40 c734c0e9 2021-08-03 op #include "script.h"
 41 c734c0e9 2021-08-03 op 
 42 c734c0e9 2021-08-03 op TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
 43 c734c0e9 2021-08-03 op static struct file {
 44 c734c0e9 2021-08-03 op 	TAILQ_ENTRY(file)	 entry;
 45 c734c0e9 2021-08-03 op 	FILE			*stream;
 46 c734c0e9 2021-08-03 op 	char			*name;
 47 c734c0e9 2021-08-03 op 	size_t	 		 ungetpos;
 48 c734c0e9 2021-08-03 op 	size_t			 ungetsize;
 49 c734c0e9 2021-08-03 op 	u_char			*ungetbuf;
 50 c734c0e9 2021-08-03 op 	int			 eof_reached;
 51 c734c0e9 2021-08-03 op 	int			 lineno;
 52 c734c0e9 2021-08-03 op 	int			 errors;
 53 c734c0e9 2021-08-03 op } *file, *topfile;
 54 c734c0e9 2021-08-03 op struct file	*pushfile(const char *);
 55 c734c0e9 2021-08-03 op int		 popfile(void);
 56 c734c0e9 2021-08-03 op int		 yyparse(void);
 57 c734c0e9 2021-08-03 op int		 yylex(void);
 58 c734c0e9 2021-08-03 op int		 yyerror(const char *, ...)
 59 c734c0e9 2021-08-03 op     __attribute__((__format__ (printf, 1, 2)))
 60 c734c0e9 2021-08-03 op     __attribute__((__nonnull__ (1)));
 61 c734c0e9 2021-08-03 op int		 kw_cmp(const void *, const void *);
 62 c734c0e9 2021-08-03 op int		 lookup(char *);
 63 c734c0e9 2021-08-03 op int		 igetc(void);
 64 c734c0e9 2021-08-03 op int		 lgetc(int);
 65 c734c0e9 2021-08-03 op void		 lungetc(int);
 66 c734c0e9 2021-08-03 op int		 findeol(void);
 67 c734c0e9 2021-08-03 op 
 68 0b453b63 2021-08-07 op static int	shouldfail;
 69 0b453b63 2021-08-07 op 
 70 c734c0e9 2021-08-03 op typedef struct {
 71 c734c0e9 2021-08-03 op 	union {
 72 c734c0e9 2021-08-03 op 		struct op	*op;
 73 c734c0e9 2021-08-03 op 		struct proc	*proc;
 74 c734c0e9 2021-08-03 op 		char		*str;
 75 c734c0e9 2021-08-03 op 		int64_t		 num;
 76 c734c0e9 2021-08-03 op 	} v;
 77 c734c0e9 2021-08-03 op 	int		 lineno;
 78 c734c0e9 2021-08-03 op } YYSTYPE;
 79 c734c0e9 2021-08-03 op 
 80 c734c0e9 2021-08-03 op %}
 81 c734c0e9 2021-08-03 op 
 82 c734c0e9 2021-08-03 op /*
 83 c734c0e9 2021-08-03 op  * for bison:
 84 c734c0e9 2021-08-03 op  * %define parse.error verbose
 85 c734c0e9 2021-08-03 op  */
 86 c734c0e9 2021-08-03 op 
 87 c734c0e9 2021-08-03 op %token	ASSERT
 88 c734c0e9 2021-08-03 op %token	CONST
 89 c734c0e9 2021-08-03 op %token	DIR
 90 c734c0e9 2021-08-03 op %token	ERROR
 91 c734c0e9 2021-08-03 op %token	INCLUDE
 92 c734c0e9 2021-08-03 op %token	PROC
 93 c734c0e9 2021-08-03 op %token	REPEAT
 94 0b453b63 2021-08-07 op %token	SHOULD_FAIL STR
 95 c734c0e9 2021-08-03 op %token	TESTING
 96 c734c0e9 2021-08-03 op %token	U8 U16 U32
 97 c734c0e9 2021-08-03 op 
 98 c734c0e9 2021-08-03 op %token	<v.str>		STRING SYMBOL
 99 c734c0e9 2021-08-03 op %token	<v.num>		NUMBER
100 c734c0e9 2021-08-03 op 
101 acf1403a 2021-08-05 op %type	<v.op>		cast cexpr check expr faccess funcall
102 8250ab19 2021-08-07 op %type	<v.op>		literal sfail var varref
103 c734c0e9 2021-08-03 op 
104 c734c0e9 2021-08-03 op %type	<v.proc>	procname
105 c734c0e9 2021-08-03 op 
106 c734c0e9 2021-08-03 op %%
107 c734c0e9 2021-08-03 op 
108 c734c0e9 2021-08-03 op program : /* empty */
109 c734c0e9 2021-08-03 op 	| program '\n'
110 c734c0e9 2021-08-03 op 	| program include '\n'
111 c734c0e9 2021-08-03 op 	| program const '\n'
112 c734c0e9 2021-08-03 op 	| program proc '\n'
113 c734c0e9 2021-08-03 op 	| program test '\n'
114 c734c0e9 2021-08-03 op 	;
115 c734c0e9 2021-08-03 op 
116 c734c0e9 2021-08-03 op optnl		: '\n' optnl		/* zero or more newlines */
117 c734c0e9 2021-08-03 op 		| /*empty*/
118 c734c0e9 2021-08-03 op 		;
119 c734c0e9 2021-08-03 op 
120 c01463a3 2021-08-04 op nl	: '\n' optnl ;
121 c01463a3 2021-08-04 op 
122 c734c0e9 2021-08-03 op include : INCLUDE STRING {
123 c734c0e9 2021-08-03 op 		struct file	*nfile;
124 c734c0e9 2021-08-03 op 
125 c734c0e9 2021-08-03 op 		if ((nfile = pushfile($2)) == NULL) {
126 c734c0e9 2021-08-03 op 			yyerror("failed to include file %s", $2);
127 c734c0e9 2021-08-03 op 			free($2);
128 c734c0e9 2021-08-03 op 			YYERROR;
129 c734c0e9 2021-08-03 op 		}
130 c734c0e9 2021-08-03 op 		free($2);
131 c734c0e9 2021-08-03 op 
132 c734c0e9 2021-08-03 op 		file = nfile;
133 c734c0e9 2021-08-03 op 		lungetc('\n');
134 c734c0e9 2021-08-03 op 	}
135 c734c0e9 2021-08-03 op 	;
136 c734c0e9 2021-08-03 op 
137 c01463a3 2021-08-04 op const	: CONST consti
138 e0b4ca44 2021-08-04 op 	| CONST '(' optnl mconst ')'
139 c01463a3 2021-08-04 op 	;
140 c01463a3 2021-08-04 op 
141 c01463a3 2021-08-04 op mconst	: consti nl | mconst consti nl ;
142 c01463a3 2021-08-04 op 
143 c01463a3 2021-08-04 op consti	: SYMBOL '=' expr {
144 c01463a3 2021-08-04 op 		if (!global_set($1, $3)) {
145 a3097d05 2021-08-04 op 			yyerror("can't set %s: illegal expression", $1);
146 c01463a3 2021-08-04 op 			free($1);
147 c01463a3 2021-08-04 op 			free_op($3);
148 c092e54b 2021-08-04 op 			YYERROR;
149 c092e54b 2021-08-04 op 		}
150 c01463a3 2021-08-04 op 	}
151 c01463a3 2021-08-04 op 	;
152 c734c0e9 2021-08-03 op 
153 c734c0e9 2021-08-03 op var	: SYMBOL '=' expr	{ $$ = op_assign($1, $3); }	;
154 c734c0e9 2021-08-03 op varref	: SYMBOL		{ $$ = op_var($1); }		;
155 c734c0e9 2021-08-03 op literal	: STRING		{ $$ = op_lit_str($1); }
156 c734c0e9 2021-08-03 op 	| NUMBER		{ $$ = op_lit_num($1); }	;
157 c734c0e9 2021-08-03 op 
158 c734c0e9 2021-08-03 op /*
159 c734c0e9 2021-08-03 op  * `expr '=' '=' expr` is ambiguous.  furthermore, we're not
160 c734c0e9 2021-08-03 op  * interested in checking all the possibilities here.
161 c734c0e9 2021-08-03 op  */
162 acf1403a 2021-08-05 op cexpr	: literal | varref | funcall | faccess ;
163 c734c0e9 2021-08-03 op check	: cexpr '=' '=' cexpr	{ $$ = op_cmp_eq($1, $4); }	;
164 c734c0e9 2021-08-03 op 
165 acf1403a 2021-08-05 op expr	: literal | funcall | varref | check | cast | faccess ;
166 c734c0e9 2021-08-03 op 
167 c734c0e9 2021-08-03 op cast	: expr ':' U8	{ $$ = op_cast($1, V_U8); }
168 c734c0e9 2021-08-03 op 	| expr ':' U16	{ $$ = op_cast($1, V_U16); }
169 c734c0e9 2021-08-03 op 	| expr ':' U32	{ $$ = op_cast($1, V_U32); }
170 c734c0e9 2021-08-03 op 	| expr ':' STR	{ $$ = op_cast($1, V_STR); }
171 acf1403a 2021-08-05 op 	;
172 acf1403a 2021-08-05 op 
173 acf1403a 2021-08-05 op faccess	: varref '.' SYMBOL	{ $$ = op_faccess($1, $3); }
174 acf1403a 2021-08-05 op 	| faccess '.' SYMBOL	{ $$ = op_faccess($1, $3); }
175 c734c0e9 2021-08-03 op 	;
176 c734c0e9 2021-08-03 op 
177 c734c0e9 2021-08-03 op procname: SYMBOL {
178 c734c0e9 2021-08-03 op 		if (($$ = proc_by_name($1)) == NULL) {
179 c734c0e9 2021-08-03 op 			yyerror("unknown proc %s", $1);
180 c734c0e9 2021-08-03 op 			free($1);
181 c734c0e9 2021-08-03 op 			YYERROR;
182 c734c0e9 2021-08-03 op 		}
183 c734c0e9 2021-08-03 op 		free($1);
184 c734c0e9 2021-08-03 op 	}
185 c734c0e9 2021-08-03 op 	;
186 c734c0e9 2021-08-03 op 
187 c734c0e9 2021-08-03 op funcall	: procname {
188 d9d02161 2021-08-04 op 		prepare_funcall();
189 c734c0e9 2021-08-03 op 	} '(' args optcomma ')' {
190 7d79f46c 2021-08-04 op 		struct proc	*proc;
191 7d79f46c 2021-08-04 op 		int		 argc;
192 7d79f46c 2021-08-04 op 
193 d9d02161 2021-08-04 op 		$$ = op_funcall($1);
194 7d79f46c 2021-08-04 op 		proc = $$->v.funcall.proc;
195 7d79f46c 2021-08-04 op 		argc = $$->v.funcall.argc;
196 7d79f46c 2021-08-04 op 
197 7d79f46c 2021-08-04 op 		if (argc != proc->minargs && !proc->vararg) {
198 7d79f46c 2021-08-04 op 			yyerror("invalid arity for `%s': want %d arguments "
199 7d79f46c 2021-08-04 op 			    "but %d given.", $1->name, proc->minargs, argc);
200 c092e54b 2021-08-04 op 			/* TODO: recursively free $$ */
201 c092e54b 2021-08-04 op 			YYERROR;
202 c092e54b 2021-08-04 op 		}
203 7d79f46c 2021-08-04 op 
204 7d79f46c 2021-08-04 op 		if (argc < proc->minargs && proc->vararg) {
205 7d79f46c 2021-08-04 op 			yyerror("invalid arity for `%s': want at least %d "
206 7d79f46c 2021-08-04 op 			    "arguments but %d given.", $1->name, proc->minargs,
207 7d79f46c 2021-08-04 op 			    argc);
208 7d79f46c 2021-08-04 op 			/* TODO: recursively free $$ */
209 7d79f46c 2021-08-04 op 			YYERROR;
210 7d79f46c 2021-08-04 op 		}
211 c734c0e9 2021-08-03 op 	}
212 c734c0e9 2021-08-03 op 	;
213 c734c0e9 2021-08-03 op 
214 c734c0e9 2021-08-03 op optcomma: /* empty */ | ',' ;
215 0e62706a 2021-08-04 op 
216 0e62706a 2021-08-04 op dots	: '.' '.' '.' ;
217 c734c0e9 2021-08-03 op 
218 c734c0e9 2021-08-03 op args	: /* empty */
219 c734c0e9 2021-08-03 op 	| args ',' expr	{ push_arg($3); }
220 0e62706a 2021-08-04 op 	| args ',' dots	{ push_arg(op_rest()); }
221 c734c0e9 2021-08-03 op 	| expr		{ push_arg($1); }
222 0e62706a 2021-08-04 op 	| dots		{ push_arg(op_rest()); }
223 c734c0e9 2021-08-03 op 	;
224 c734c0e9 2021-08-03 op 
225 c734c0e9 2021-08-03 op proc	: PROC SYMBOL {
226 d9d02161 2021-08-04 op 		prepare_proc();
227 c734c0e9 2021-08-03 op 	} '(' args ')' {
228 d9d02161 2021-08-04 op 		if (!proc_setup_body()) {
229 d9d02161 2021-08-04 op 			yyerror("invalid argument in proc `%s' definition",
230 d9d02161 2021-08-04 op 			    $2);
231 d9d02161 2021-08-04 op 			free($2);
232 d9d02161 2021-08-04 op 			YYERROR;
233 d9d02161 2021-08-04 op 		}
234 c734c0e9 2021-08-03 op 	} '{' optnl block '}' {
235 d9d02161 2021-08-04 op 		proc_done($2);
236 c734c0e9 2021-08-03 op 	}
237 c734c0e9 2021-08-03 op 	;
238 c734c0e9 2021-08-03 op 
239 c734c0e9 2021-08-03 op block	: /* empty */
240 d7be3bcc 2021-08-04 op 	| block var nl		{ block_push($2); }
241 d7be3bcc 2021-08-04 op 	| block funcall nl	{ block_push($2); }
242 d7be3bcc 2021-08-04 op 	| block assert nl
243 8250ab19 2021-08-07 op 	| block sfail nl	{ block_push($2); }
244 c734c0e9 2021-08-03 op 	;
245 c734c0e9 2021-08-03 op 
246 8250ab19 2021-08-07 op sfail	: SHOULD_FAIL expr		{ $$ = op_sfail($2, NULL); }
247 8250ab19 2021-08-07 op 	| SHOULD_FAIL expr ':' STRING	{ $$ = op_sfail($2, $4); }
248 8250ab19 2021-08-07 op 	;
249 8250ab19 2021-08-07 op 
250 e0b4ca44 2021-08-04 op assert	: ASSERT asserti
251 e0b4ca44 2021-08-04 op 	| ASSERT '(' optnl massert ')'
252 c734c0e9 2021-08-03 op 	;
253 c734c0e9 2021-08-03 op 
254 e0b4ca44 2021-08-04 op massert	: asserti nl | massert asserti nl ;
255 e0b4ca44 2021-08-04 op 
256 e0b4ca44 2021-08-04 op asserti	: check			{ block_push(op_assert($1)); }
257 c734c0e9 2021-08-03 op 	;
258 c734c0e9 2021-08-03 op 
259 c734c0e9 2021-08-03 op test	: TESTING STRING DIR STRING {
260 d9d02161 2021-08-04 op 		prepare_test();
261 0b453b63 2021-08-07 op 	} testopt '{' optnl block '}' {
262 0b453b63 2021-08-07 op 		test_done(shouldfail, $2, $4);
263 0b453b63 2021-08-07 op 		shouldfail = 0;
264 c734c0e9 2021-08-03 op 	}
265 0b453b63 2021-08-07 op 	;
266 0b453b63 2021-08-07 op 
267 0b453b63 2021-08-07 op testopt	: /* empty */
268 0b453b63 2021-08-07 op 	| SHOULD_FAIL	{ shouldfail = 1; }
269 c734c0e9 2021-08-03 op 	;
270 c734c0e9 2021-08-03 op 
271 c734c0e9 2021-08-03 op %%
272 c734c0e9 2021-08-03 op 
273 c734c0e9 2021-08-03 op struct keywords {
274 c734c0e9 2021-08-03 op 	const char	*k_name;
275 c734c0e9 2021-08-03 op 	int		 k_val;
276 c734c0e9 2021-08-03 op };
277 c734c0e9 2021-08-03 op 
278 c734c0e9 2021-08-03 op int
279 c734c0e9 2021-08-03 op yyerror(const char *fmt, ...)
280 c734c0e9 2021-08-03 op {
281 c734c0e9 2021-08-03 op 	va_list		 ap;
282 c734c0e9 2021-08-03 op 	char		*msg;
283 c734c0e9 2021-08-03 op 
284 c734c0e9 2021-08-03 op 	file->errors++;
285 c734c0e9 2021-08-03 op 	va_start(ap, fmt);
286 c734c0e9 2021-08-03 op 	if (vasprintf(&msg, fmt, ap) == -1)
287 c734c0e9 2021-08-03 op 		fatalx("yyerror vasprintf");
288 c734c0e9 2021-08-03 op 	va_end(ap);
289 c734c0e9 2021-08-03 op 	logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
290 c734c0e9 2021-08-03 op 	free(msg);
291 c734c0e9 2021-08-03 op 	return 0;
292 c734c0e9 2021-08-03 op }
293 c734c0e9 2021-08-03 op 
294 c734c0e9 2021-08-03 op int
295 c734c0e9 2021-08-03 op kw_cmp(const void *k, const void *e)
296 c734c0e9 2021-08-03 op {
297 c734c0e9 2021-08-03 op 	return strcmp(k, ((const struct keywords *)e)->k_name);
298 c734c0e9 2021-08-03 op }
299 c734c0e9 2021-08-03 op 
300 c734c0e9 2021-08-03 op int
301 c734c0e9 2021-08-03 op lookup(char *s)
302 c734c0e9 2021-08-03 op {
303 c734c0e9 2021-08-03 op 	/* This has to be sorted always. */
304 c734c0e9 2021-08-03 op 	static const struct keywords keywords[] = {
305 c734c0e9 2021-08-03 op 		{"assert",	ASSERT},
306 c734c0e9 2021-08-03 op 		{"const",	CONST},
307 c734c0e9 2021-08-03 op 		{"dir",		DIR},
308 c734c0e9 2021-08-03 op 		{"include",	INCLUDE},
309 c734c0e9 2021-08-03 op 		{"proc",	PROC},
310 c734c0e9 2021-08-03 op 		{"repeat",	REPEAT},
311 0b453b63 2021-08-07 op 		{"should-fail",	SHOULD_FAIL},
312 c734c0e9 2021-08-03 op 		{"str",		STR},
313 c734c0e9 2021-08-03 op 		{"testing",	TESTING},
314 c734c0e9 2021-08-03 op 		{"u16",		U16},
315 c734c0e9 2021-08-03 op 		{"u32",		U32},
316 d7786ef0 2021-08-04 op 		{"u8",		U8},
317 c734c0e9 2021-08-03 op 	};
318 c734c0e9 2021-08-03 op 	const struct keywords	*p;
319 c734c0e9 2021-08-03 op 
320 c734c0e9 2021-08-03 op 	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
321 c734c0e9 2021-08-03 op 	    sizeof(keywords[0]), kw_cmp);
322 c734c0e9 2021-08-03 op 
323 c734c0e9 2021-08-03 op 	if (p)
324 c734c0e9 2021-08-03 op 		return p->k_val;
325 c734c0e9 2021-08-03 op 	else
326 c734c0e9 2021-08-03 op 		return SYMBOL;
327 c734c0e9 2021-08-03 op }
328 c734c0e9 2021-08-03 op 
329 c734c0e9 2021-08-03 op #define START_EXPAND	1
330 c734c0e9 2021-08-03 op #define DONE_EXPAND	2
331 c734c0e9 2021-08-03 op 
332 c734c0e9 2021-08-03 op static int	expanding;
333 c734c0e9 2021-08-03 op 
334 c734c0e9 2021-08-03 op int
335 c734c0e9 2021-08-03 op igetc(void)
336 c734c0e9 2021-08-03 op {
337 c734c0e9 2021-08-03 op 	int	c;
338 c734c0e9 2021-08-03 op 
339 c734c0e9 2021-08-03 op 	while (1) {
340 c734c0e9 2021-08-03 op 		if (file->ungetpos > 0)
341 c734c0e9 2021-08-03 op 			c = file->ungetbuf[--file->ungetpos];
342 c734c0e9 2021-08-03 op 		else
343 c734c0e9 2021-08-03 op 			c = getc(file->stream);
344 c734c0e9 2021-08-03 op 
345 c734c0e9 2021-08-03 op 		if (c == START_EXPAND)
346 c734c0e9 2021-08-03 op 			expanding = 1;
347 c734c0e9 2021-08-03 op 		else if (c == DONE_EXPAND)
348 c734c0e9 2021-08-03 op 			expanding = 0;
349 c734c0e9 2021-08-03 op 		else
350 c734c0e9 2021-08-03 op 			break;
351 c734c0e9 2021-08-03 op 	}
352 c734c0e9 2021-08-03 op 	return c;
353 c734c0e9 2021-08-03 op }
354 c734c0e9 2021-08-03 op 
355 c734c0e9 2021-08-03 op int
356 c734c0e9 2021-08-03 op lgetc(int quotec)
357 c734c0e9 2021-08-03 op {
358 c734c0e9 2021-08-03 op 	int		c, next;
359 c734c0e9 2021-08-03 op 
360 c734c0e9 2021-08-03 op 	if (quotec) {
361 c734c0e9 2021-08-03 op 		if ((c = igetc()) == EOF) {
362 c734c0e9 2021-08-03 op 			yyerror("reached end of file while parsing "
363 c734c0e9 2021-08-03 op 			    "quoted string");
364 c734c0e9 2021-08-03 op 			if (file == topfile || popfile() == EOF)
365 c734c0e9 2021-08-03 op 				return EOF;
366 c734c0e9 2021-08-03 op 			return quotec;
367 c734c0e9 2021-08-03 op 		}
368 c734c0e9 2021-08-03 op 		return c;
369 c734c0e9 2021-08-03 op 	}
370 c734c0e9 2021-08-03 op 
371 c734c0e9 2021-08-03 op 	while ((c = igetc()) == '\\') {
372 c734c0e9 2021-08-03 op 		next = igetc();
373 c734c0e9 2021-08-03 op 		if (next != '\n') {
374 c734c0e9 2021-08-03 op 			c = next;
375 c734c0e9 2021-08-03 op 			break;
376 c734c0e9 2021-08-03 op 		}
377 c734c0e9 2021-08-03 op 		yylval.lineno = file->lineno;
378 c734c0e9 2021-08-03 op 		file->lineno++;
379 c734c0e9 2021-08-03 op 	}
380 c734c0e9 2021-08-03 op 
381 c734c0e9 2021-08-03 op 	if (c == EOF) {
382 c734c0e9 2021-08-03 op 		/*
383 c734c0e9 2021-08-03 op 		 * Fake EOL when hit EOF for the first time. This gets line
384 c734c0e9 2021-08-03 op 		 * count right if last line in included file is syntactically
385 c734c0e9 2021-08-03 op 		 * invalid and has no newline.
386 c734c0e9 2021-08-03 op 		 */
387 c734c0e9 2021-08-03 op 		if (file->eof_reached == 0) {
388 c734c0e9 2021-08-03 op 			file->eof_reached = 1;
389 c734c0e9 2021-08-03 op 			return '\n';
390 c734c0e9 2021-08-03 op 		}
391 c734c0e9 2021-08-03 op 		while (c == EOF) {
392 c734c0e9 2021-08-03 op 			if (file == topfile || popfile() == EOF)
393 c734c0e9 2021-08-03 op 				return EOF;
394 c734c0e9 2021-08-03 op 			c = igetc();
395 c734c0e9 2021-08-03 op 		}
396 c734c0e9 2021-08-03 op 	}
397 c734c0e9 2021-08-03 op 	return c;
398 c734c0e9 2021-08-03 op }
399 c734c0e9 2021-08-03 op 
400 c734c0e9 2021-08-03 op void
401 c734c0e9 2021-08-03 op lungetc(int c)
402 c734c0e9 2021-08-03 op {
403 c734c0e9 2021-08-03 op 	if (c == EOF)
404 c734c0e9 2021-08-03 op 		return;
405 c734c0e9 2021-08-03 op 
406 c734c0e9 2021-08-03 op 	if (file->ungetpos >= file->ungetsize) {
407 c734c0e9 2021-08-03 op 		void *p = reallocarray(file->ungetbuf, file->ungetsize, 2);
408 c734c0e9 2021-08-03 op 		if (p == NULL)
409 c734c0e9 2021-08-03 op 			err(1, "lungetc");
410 c734c0e9 2021-08-03 op 		file->ungetbuf = p;
411 c734c0e9 2021-08-03 op 		file->ungetsize *= 2;
412 c734c0e9 2021-08-03 op 	}
413 c734c0e9 2021-08-03 op 	file->ungetbuf[file->ungetpos++] = c;
414 c734c0e9 2021-08-03 op }
415 c734c0e9 2021-08-03 op 
416 c734c0e9 2021-08-03 op int
417 c734c0e9 2021-08-03 op findeol(void)
418 c734c0e9 2021-08-03 op {
419 c734c0e9 2021-08-03 op 	int	c;
420 c734c0e9 2021-08-03 op 
421 c734c0e9 2021-08-03 op 	/* Skip to either EOF or the first real EOL. */
422 c734c0e9 2021-08-03 op 	while (1) {
423 c734c0e9 2021-08-03 op 		c = lgetc(0);
424 c734c0e9 2021-08-03 op 		if (c == '\n') {
425 c734c0e9 2021-08-03 op 			file->lineno++;
426 c734c0e9 2021-08-03 op 			break;
427 c734c0e9 2021-08-03 op 		}
428 c734c0e9 2021-08-03 op 		if (c == EOF)
429 c734c0e9 2021-08-03 op 			break;
430 c734c0e9 2021-08-03 op 	}
431 c734c0e9 2021-08-03 op 	return ERROR;
432 c734c0e9 2021-08-03 op }
433 c734c0e9 2021-08-03 op 
434 c734c0e9 2021-08-03 op 
435 c734c0e9 2021-08-03 op #if 0
436 c734c0e9 2021-08-03 op int my_yylex(void);
437 c734c0e9 2021-08-03 op 
438 c734c0e9 2021-08-03 op int
439 c734c0e9 2021-08-03 op yylex(void)
440 c734c0e9 2021-08-03 op {
441 c734c0e9 2021-08-03 op 	int x;
442 c734c0e9 2021-08-03 op 
443 c734c0e9 2021-08-03 op 	switch (x = my_yylex()) {
444 c734c0e9 2021-08-03 op 	case ASSERT: puts("assert"); break;
445 c734c0e9 2021-08-03 op 	case CONST: puts("const"); break;
446 c734c0e9 2021-08-03 op 	case DIR: puts("dir"); break;
447 c734c0e9 2021-08-03 op 	case ERROR: puts("error"); break;
448 c734c0e9 2021-08-03 op 	case INCLUDE: puts("include"); break;
449 c734c0e9 2021-08-03 op 	case PROC: puts("proc"); break;
450 c734c0e9 2021-08-03 op 	case REPEAT: puts("repeat"); break;
451 c734c0e9 2021-08-03 op 	case STR: puts(":str"); break;
452 c734c0e9 2021-08-03 op 	case TESTING: puts("testing"); break;
453 c734c0e9 2021-08-03 op 	case U8: puts(":u8"); break;
454 c734c0e9 2021-08-03 op 	case U16: puts(":u16"); break;
455 c734c0e9 2021-08-03 op 	case U32: puts(":u32"); break;
456 c734c0e9 2021-08-03 op 
457 c734c0e9 2021-08-03 op 	case STRING: printf("string \"%s\"\n", yylval.v.str); break;
458 c734c0e9 2021-08-03 op 	case SYMBOL: printf("symbol %s\n", yylval.v.str); break;
459 c734c0e9 2021-08-03 op 	case NUMBER: printf("number %"PRIu64"\n", yylval.v.num); break;
460 c734c0e9 2021-08-03 op 
461 c734c0e9 2021-08-03 op 	default:
462 c734c0e9 2021-08-03 op 		printf("character ");
463 c734c0e9 2021-08-03 op 		if (x == '\n')
464 c734c0e9 2021-08-03 op 			printf("\\n");
465 c734c0e9 2021-08-03 op 		else
466 c734c0e9 2021-08-03 op 			printf("%c", x);
467 c734c0e9 2021-08-03 op 		printf(" [0x%x]", x);
468 c734c0e9 2021-08-03 op 		printf("\n");
469 c734c0e9 2021-08-03 op 		break;
470 c734c0e9 2021-08-03 op 	}
471 c734c0e9 2021-08-03 op 
472 c734c0e9 2021-08-03 op 	return x;
473 c734c0e9 2021-08-03 op }
474 c734c0e9 2021-08-03 op 
475 c734c0e9 2021-08-03 op int
476 c734c0e9 2021-08-03 op my_yylex(void)
477 c734c0e9 2021-08-03 op #else
478 c734c0e9 2021-08-03 op int
479 c734c0e9 2021-08-03 op yylex(void)
480 c734c0e9 2021-08-03 op #endif
481 c734c0e9 2021-08-03 op {
482 c734c0e9 2021-08-03 op 	unsigned char	 buf[8096];
483 c734c0e9 2021-08-03 op 	unsigned char	*p;
484 c734c0e9 2021-08-03 op 	int		 quotec, next, c;
485 c734c0e9 2021-08-03 op 	int		 token;
486 c734c0e9 2021-08-03 op 
487 c734c0e9 2021-08-03 op 	p = buf;
488 c734c0e9 2021-08-03 op 	while ((c = lgetc(0)) == ' ' || c == '\t' || c == '\f')
489 c734c0e9 2021-08-03 op 		; /* nop */
490 c734c0e9 2021-08-03 op 
491 c734c0e9 2021-08-03 op 	yylval.lineno = file->lineno;
492 c734c0e9 2021-08-03 op 	if (c == '#')
493 c734c0e9 2021-08-03 op 		while ((c = lgetc(0)) != '\n' && c != EOF)
494 c734c0e9 2021-08-03 op 			; /* nop */
495 c734c0e9 2021-08-03 op 
496 c734c0e9 2021-08-03 op 	switch (c) {
497 1433867a 2021-08-04 op 	case ':':
498 1433867a 2021-08-04 op 		return c;
499 1433867a 2021-08-04 op 		break;
500 c734c0e9 2021-08-03 op 	case '\'':
501 c734c0e9 2021-08-03 op 	case '\"':
502 c734c0e9 2021-08-03 op 		quotec = c;
503 c734c0e9 2021-08-03 op 		while (1) {
504 c734c0e9 2021-08-03 op 			if ((c = lgetc(quotec)) == EOF)
505 c734c0e9 2021-08-03 op 				return 0;
506 c734c0e9 2021-08-03 op 			if (c == '\n') {
507 c734c0e9 2021-08-03 op 				file->lineno++;
508 c734c0e9 2021-08-03 op 				continue;
509 c734c0e9 2021-08-03 op 			} else if (c == '\\') {
510 c734c0e9 2021-08-03 op 				if ((next = lgetc(quotec)) == EOF)
511 c734c0e9 2021-08-03 op 					return 0;
512 c734c0e9 2021-08-03 op 				if (next == quotec || next == ' ' ||
513 c734c0e9 2021-08-03 op 				    next == '\t')
514 c734c0e9 2021-08-03 op 					c = next;
515 c734c0e9 2021-08-03 op 				else if (next == '\n') {
516 c734c0e9 2021-08-03 op 					file->lineno++;
517 c734c0e9 2021-08-03 op 					continue;
518 c734c0e9 2021-08-03 op 				} else
519 c734c0e9 2021-08-03 op 					lungetc(next);
520 c734c0e9 2021-08-03 op 			} else if (c == quotec) {
521 c734c0e9 2021-08-03 op 				*p = '\0';
522 c734c0e9 2021-08-03 op 				break;
523 c734c0e9 2021-08-03 op 			} else if (c == '\0') {
524 c734c0e9 2021-08-03 op 				yyerror("syntax error");
525 c734c0e9 2021-08-03 op 				return findeol();
526 c734c0e9 2021-08-03 op 			}
527 c734c0e9 2021-08-03 op 
528 c734c0e9 2021-08-03 op 			if (p + 1 >= buf + sizeof(buf) - 1) {
529 c734c0e9 2021-08-03 op 				yyerror("string too long");
530 c734c0e9 2021-08-03 op 				return findeol();
531 c734c0e9 2021-08-03 op 			}
532 c734c0e9 2021-08-03 op 
533 c734c0e9 2021-08-03 op 			*p++ = c;
534 c734c0e9 2021-08-03 op 		}
535 c734c0e9 2021-08-03 op 
536 c734c0e9 2021-08-03 op 		yylval.v.str = xstrdup(buf);
537 c734c0e9 2021-08-03 op 		return STRING;
538 c734c0e9 2021-08-03 op 	}
539 c734c0e9 2021-08-03 op 
540 c734c0e9 2021-08-03 op #define allowed_to_end_number(x) \
541 c734c0e9 2021-08-03 op 	(isspace(x) || x == ')' || x == ',' || x == '/' || x == '}' \
542 1433867a 2021-08-04 op 	    || x == '=' || x == ':')
543 c734c0e9 2021-08-03 op 
544 c734c0e9 2021-08-03 op 	if (c == '-' || isdigit(c)) {
545 c734c0e9 2021-08-03 op 		do {
546 c734c0e9 2021-08-03 op 			*p++ = c;
547 c734c0e9 2021-08-03 op 			if ((size_t)(p-buf) >= sizeof(buf)) {
548 c734c0e9 2021-08-03 op 				yyerror("string too long");
549 c734c0e9 2021-08-03 op 				return findeol();
550 c734c0e9 2021-08-03 op 			}
551 c734c0e9 2021-08-03 op 		} while ((c = lgetc(0)) != EOF && isdigit(c));
552 c734c0e9 2021-08-03 op 		lungetc(c);
553 c734c0e9 2021-08-03 op 		if (p == buf + 1 && buf[0] == '-')
554 c734c0e9 2021-08-03 op 			goto nodigits;
555 c734c0e9 2021-08-03 op 		if (c == EOF || allowed_to_end_number(c)) {
556 c734c0e9 2021-08-03 op 			const char *errstr = NULL;
557 c734c0e9 2021-08-03 op 
558 c734c0e9 2021-08-03 op 			*p = '\0';
559 c734c0e9 2021-08-03 op 			yylval.v.num = strtonum(buf, INT64_MIN, INT64_MAX,
560 c734c0e9 2021-08-03 op 			    &errstr);
561 c734c0e9 2021-08-03 op 			if (errstr) {
562 c734c0e9 2021-08-03 op 				yyerror("\"%s\" invalid number: %s",
563 c734c0e9 2021-08-03 op 				    buf, errstr);
564 c734c0e9 2021-08-03 op 				return findeol();
565 c734c0e9 2021-08-03 op 			}
566 c734c0e9 2021-08-03 op 			return NUMBER;
567 c734c0e9 2021-08-03 op 		} else {
568 c734c0e9 2021-08-03 op nodigits:
569 c734c0e9 2021-08-03 op 			while (p > buf + 1)
570 c734c0e9 2021-08-03 op 				lungetc(*--p);
571 c734c0e9 2021-08-03 op 			c = *--p;
572 c734c0e9 2021-08-03 op 			if (c == '-')
573 c734c0e9 2021-08-03 op 				return c;
574 c734c0e9 2021-08-03 op 		}
575 c734c0e9 2021-08-03 op 	}
576 c734c0e9 2021-08-03 op 
577 c734c0e9 2021-08-03 op #define allowed_in_symbol(x)				\
578 c734c0e9 2021-08-03 op 	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
579 c734c0e9 2021-08-03 op 	    x != '{' && x != '}' && \
580 c734c0e9 2021-08-03 op 	    x != '!' && x != '=' && \
581 e48a50b7 2021-08-07 op 	    x != '#' && x != ',' && \
582 e48a50b7 2021-08-07 op 	    x != '.'))
583 c734c0e9 2021-08-03 op 
584 c734c0e9 2021-08-03 op 	if (isalnum(c) || c == ':' || c == '_') {
585 c734c0e9 2021-08-03 op 		do {
586 c734c0e9 2021-08-03 op 			*p++ = c;
587 c734c0e9 2021-08-03 op 			if ((size_t)(p-buf) >= sizeof(buf)) {
588 c734c0e9 2021-08-03 op 				yyerror("string too long");
589 c734c0e9 2021-08-03 op 				return findeol();
590 c734c0e9 2021-08-03 op 			}
591 c734c0e9 2021-08-03 op 		} while ((c = lgetc(0)) != EOF && (allowed_in_symbol(c)));
592 c734c0e9 2021-08-03 op 		lungetc(c);
593 c734c0e9 2021-08-03 op 		*p = '\0';
594 c734c0e9 2021-08-03 op 		if ((token = lookup(buf)) == SYMBOL)
595 c734c0e9 2021-08-03 op 			yylval.v.str = xstrdup(buf);
596 c734c0e9 2021-08-03 op 		return token;
597 c734c0e9 2021-08-03 op 	}
598 c734c0e9 2021-08-03 op 
599 c734c0e9 2021-08-03 op 	if (c == '\n') {
600 c734c0e9 2021-08-03 op 		yylval.lineno = file->lineno;
601 c734c0e9 2021-08-03 op 		file->lineno++;
602 c734c0e9 2021-08-03 op 	}
603 c734c0e9 2021-08-03 op 	if (c == EOF)
604 c734c0e9 2021-08-03 op 		return 0;
605 c734c0e9 2021-08-03 op 	return c;
606 c734c0e9 2021-08-03 op }
607 c734c0e9 2021-08-03 op 
608 c734c0e9 2021-08-03 op struct file *
609 c734c0e9 2021-08-03 op pushfile(const char *name)
610 c734c0e9 2021-08-03 op {
611 c734c0e9 2021-08-03 op 	struct file	*nfile;
612 c734c0e9 2021-08-03 op 
613 c734c0e9 2021-08-03 op 	if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
614 c734c0e9 2021-08-03 op 		log_warn("calloc");
615 c734c0e9 2021-08-03 op 		return NULL;
616 c734c0e9 2021-08-03 op 	}
617 c734c0e9 2021-08-03 op 	if ((nfile->name = strdup(name)) == NULL) {
618 c734c0e9 2021-08-03 op 		log_warn("strdup");
619 c734c0e9 2021-08-03 op 		free(nfile);
620 c734c0e9 2021-08-03 op 		return NULL;
621 c734c0e9 2021-08-03 op 	}
622 c734c0e9 2021-08-03 op 	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
623 c734c0e9 2021-08-03 op 		log_warn("%s", nfile->name);
624 c734c0e9 2021-08-03 op 		free(nfile->name);
625 c734c0e9 2021-08-03 op 		free(nfile);
626 c734c0e9 2021-08-03 op 		return NULL;
627 c734c0e9 2021-08-03 op 	}
628 c734c0e9 2021-08-03 op 	nfile->lineno = TAILQ_EMPTY(&files) ? 1 : 0;
629 c734c0e9 2021-08-03 op 	nfile->ungetsize = 16;
630 c734c0e9 2021-08-03 op 	nfile->ungetbuf = malloc(nfile->ungetsize);
631 c734c0e9 2021-08-03 op 	if (nfile->ungetbuf == NULL) {
632 c734c0e9 2021-08-03 op 		log_warn("malloc");
633 c734c0e9 2021-08-03 op 		fclose(nfile->stream);
634 c734c0e9 2021-08-03 op 		free(nfile->name);
635 c734c0e9 2021-08-03 op 		free(nfile);
636 c734c0e9 2021-08-03 op 		return NULL;
637 c734c0e9 2021-08-03 op 	}
638 c734c0e9 2021-08-03 op 	TAILQ_INSERT_TAIL(&files, nfile, entry);
639 c734c0e9 2021-08-03 op 	return nfile;
640 c734c0e9 2021-08-03 op }
641 c734c0e9 2021-08-03 op 
642 c734c0e9 2021-08-03 op int
643 c734c0e9 2021-08-03 op popfile(void)
644 c734c0e9 2021-08-03 op {
645 c734c0e9 2021-08-03 op 	struct file	*prev;
646 c734c0e9 2021-08-03 op 
647 c734c0e9 2021-08-03 op 	if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
648 c734c0e9 2021-08-03 op 		prev->errors += file->errors;
649 c734c0e9 2021-08-03 op 
650 c734c0e9 2021-08-03 op 	TAILQ_REMOVE(&files, file, entry);
651 c734c0e9 2021-08-03 op 	fclose(file->stream);
652 c734c0e9 2021-08-03 op 	free(file->name);
653 c734c0e9 2021-08-03 op 	free(file->ungetbuf);
654 c734c0e9 2021-08-03 op 	free(file);
655 c734c0e9 2021-08-03 op 	file = prev;
656 c734c0e9 2021-08-03 op 	return file ? 0 : EOF;
657 c734c0e9 2021-08-03 op }
658 c734c0e9 2021-08-03 op 
659 c734c0e9 2021-08-03 op void
660 c734c0e9 2021-08-03 op loadfile(const char *path)
661 c734c0e9 2021-08-03 op {
662 c734c0e9 2021-08-03 op 	int errors;
663 c734c0e9 2021-08-03 op 
664 c734c0e9 2021-08-03 op 	file = pushfile(path);
665 c734c0e9 2021-08-03 op 	if (file == NULL)
666 c734c0e9 2021-08-03 op 		err(1, "pushfile");
667 c734c0e9 2021-08-03 op 	topfile = file;
668 c734c0e9 2021-08-03 op 
669 c734c0e9 2021-08-03 op 	yyparse();
670 c734c0e9 2021-08-03 op 	errors = file->errors;
671 c734c0e9 2021-08-03 op 	popfile();
672 c734c0e9 2021-08-03 op 
673 c734c0e9 2021-08-03 op 	if (errors)
674 c734c0e9 2021-08-03 op 		errx(1, "can't load %s because of errors", path);
675 c734c0e9 2021-08-03 op }