summary refs log tree commit diff
path: root/parse.y
blob: c035e4e89479d67ef40ed6e947420b25a78d2035 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
/*	$OpenBSD$ */

/*
 * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
 * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
 * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

%{

#include <sys/types.h>
#include <sys/queue.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "calmwm.h"

TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
static struct file {
	TAILQ_ENTRY(file)	 entry;
	FILE			*stream;
	char			*name;
	int			 lineno;
	int			 errors;
} *file, *topfile;
struct file	*pushfile(const char *);
int		 popfile(void);
int		 yyparse(void);
int		 yylex(void);
int		 yyerror(const char *, ...)
    __attribute__((__format__ (printf, 1, 2)))
    __attribute__((__nonnull__ (1)));
int		 kw_cmp(const void *, const void *);
int		 lookup(char *);
int		 lgetc(int);
int		 lungetc(int);
int		 findeol(void);

static struct conf	*conf;

typedef struct {
	union {
		int64_t			 number;
		char			*string;
	} v;
	int lineno;
} YYSTYPE;

%}

%token	FONTNAME STICKY GAP MOUSEBIND
%token	AUTOGROUP BIND COMMAND IGNORE
%token	YES NO BORDERWIDTH MOVEAMOUNT
%token	COLOR SNAPDIST
%token	ACTIVEBORDER INACTIVEBORDER URGENCYBORDER
%token	GROUPBORDER UNGROUPBORDER
%token	MENUBG MENUFG
%token	FONTCOLOR FONTSELCOLOR
%token	ERROR
%token	<v.string>		STRING
%token	<v.number>		NUMBER
%type	<v.number>		yesno
%type	<v.string>		string
%%

grammar		: /* empty */
		| grammar '\n'
		| grammar main '\n'
		| grammar color '\n'
		| grammar error '\n'		{ file->errors++; }
		;

string		: string STRING			{
			if (asprintf(&$$, "%s %s", $1, $2) == -1) {
				free($1);
				free($2);
				yyerror("string: asprintf");
				YYERROR;
			}
			free($1);
			free($2);
		}
		| STRING
		;

yesno		: YES				{ $$ = 1; }
		| NO				{ $$ = 0; }
		;

main		: FONTNAME STRING		{
			free(conf->font);
			conf->font = $2;
		}
		| STICKY yesno {
			conf->stickygroups = $2;
		}
		| BORDERWIDTH NUMBER {
			if ($2 < 0 || $2 > UINT_MAX) {
				yyerror("invalid borderwidth");
				YYERROR;
			}
			conf->bwidth = $2;
		}
		| MOVEAMOUNT NUMBER {
			if ($2 < 0 || $2 > INT_MAX) {
				yyerror("invalid movemount");
				YYERROR;
			}
			conf->mamount = $2;
		}
		| SNAPDIST NUMBER {
			if ($2 < 0 || $2 > INT_MAX) {
				yyerror("invalid snapdist");
				YYERROR;
			}
			conf->snapdist = $2;
		}
		| COMMAND STRING string		{
			if (!conf_cmd_add(conf, $2, $3)) {
				yyerror("command name/path too long");
				free($2);
				free($3);
				YYERROR;
			}
			free($2);
			free($3);
		}
		| AUTOGROUP NUMBER STRING	{
			if ($2 < 0 || $2 > 9) {
				yyerror("invalid autogroup");
				free($3);
				YYERROR;
			}
			conf_autogroup(conf, $2, NULL, $3);
			free($3);
		}
		| AUTOGROUP NUMBER STRING ',' STRING {
			if ($2 < 0 || $2 > 9) {
				yyerror("invalid autogroup");
				free($3);
				free($5);
				YYERROR;
			}
			conf_autogroup(conf, $2, $3, $5);
			free($3);
			free($5);
		}
		| IGNORE STRING {
			conf_ignore(conf, $2);
			free($2);
		}
		| BIND STRING string		{
			if (!conf_bind_kbd(conf, $2, $3)) {
				yyerror("invalid bind: %s %s", $2, $3);
				free($2);
				free($3);
				YYERROR;
			}
			free($2);
			free($3);
		}
		| GAP NUMBER NUMBER NUMBER NUMBER {
			if ($2 < 0 || $2 > INT_MAX ||
			    $3 < 0 || $3 > INT_MAX ||
			    $4 < 0 || $4 > INT_MAX ||
			    $5 < 0 || $5 > INT_MAX) {
				yyerror("invalid gap");
				YYERROR;
			}
			conf->gap.top = $2;
			conf->gap.bottom = $3;
			conf->gap.left = $4;
			conf->gap.right = $5;
		}
		| MOUSEBIND STRING string	{
			if (!conf_bind_mouse(conf, $2, $3)) {
				yyerror("invalid mousebind: %s %s", $2, $3);
				free($2);
				free($3);
				YYERROR;
			}
			free($2);
			free($3);
		}
		;

color		: COLOR colors
		;

colors		: ACTIVEBORDER STRING {
			free(conf->color[CWM_COLOR_BORDER_ACTIVE]);
			conf->color[CWM_COLOR_BORDER_ACTIVE] = $2;
		}
		| INACTIVEBORDER STRING {
			free(conf->color[CWM_COLOR_BORDER_INACTIVE]);
			conf->color[CWM_COLOR_BORDER_INACTIVE] = $2;
		}
		| URGENCYBORDER STRING {
			free(conf->color[CWM_COLOR_BORDER_URGENCY]);
			conf->color[CWM_COLOR_BORDER_URGENCY] = $2;
		}
		| GROUPBORDER STRING {
			free(conf->color[CWM_COLOR_BORDER_GROUP]);
			conf->color[CWM_COLOR_BORDER_GROUP] = $2;
		}
		| UNGROUPBORDER STRING {
			free(conf->color[CWM_COLOR_BORDER_UNGROUP]);
			conf->color[CWM_COLOR_BORDER_UNGROUP] = $2;
		}
		| MENUBG STRING {
			free(conf->color[CWM_COLOR_MENU_BG]);
			conf->color[CWM_COLOR_MENU_BG] = $2;
		}
		| MENUFG STRING {
			free(conf->color[CWM_COLOR_MENU_FG]);
			conf->color[CWM_COLOR_MENU_FG] = $2;
		}
		| FONTCOLOR STRING {
			free(conf->color[CWM_COLOR_MENU_FONT]);
			conf->color[CWM_COLOR_MENU_FONT] = $2;
		}
		| FONTSELCOLOR STRING {
			free(conf->color[CWM_COLOR_MENU_FONT_SEL]);
			conf->color[CWM_COLOR_MENU_FONT_SEL] = $2;
		}
		;
%%

struct keywords {
	const char	*k_name;
	int		 k_val;
};

int
yyerror(const char *fmt, ...)
{
	va_list		 ap;

	file->errors++;
	va_start(ap, fmt);
	fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
	vfprintf(stderr, fmt, ap);
	fprintf(stderr, "\n");
	va_end(ap);
	return (0);
}

int
kw_cmp(const void *k, const void *e)
{
	return (strcmp(k, ((const struct keywords *)e)->k_name));
}

int
lookup(char *s)
{
	/* this has to be sorted always */
	static const struct keywords keywords[] = {
		{ "activeborder",	ACTIVEBORDER},
		{ "autogroup",		AUTOGROUP},
		{ "bind",		BIND},
		{ "borderwidth",	BORDERWIDTH},
		{ "color",		COLOR},
		{ "command",		COMMAND},
		{ "font",		FONTCOLOR},
		{ "fontname",		FONTNAME},
		{ "gap",		GAP},
		{ "groupborder",	GROUPBORDER},
		{ "ignore",		IGNORE},
		{ "inactiveborder",	INACTIVEBORDER},
		{ "menubg",		MENUBG},
		{ "menufg",		MENUFG},
		{ "mousebind",		MOUSEBIND},
		{ "moveamount",		MOVEAMOUNT},
		{ "no",			NO},
		{ "selfont", 		FONTSELCOLOR},
		{ "snapdist",		SNAPDIST},
		{ "sticky",		STICKY},
		{ "ungroupborder",	UNGROUPBORDER},
		{ "urgencyborder",	URGENCYBORDER},
		{ "yes",		YES}
	};
	const struct keywords	*p;

	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
	    sizeof(keywords[0]), kw_cmp);

	if (p)
		return (p->k_val);
	else
		return (STRING);
}

#define MAXPUSHBACK	128

u_char	*parsebuf;
int	 parseindex;
u_char	 pushback_buffer[MAXPUSHBACK];
int	 pushback_index = 0;

int
lgetc(int quotec)
{
	int		c, next;

	if (parsebuf) {
		/* Read character from the parsebuffer instead of input. */
		if (parseindex >= 0) {
			c = parsebuf[parseindex++];
			if (c != '\0')
				return (c);
			parsebuf = NULL;
		} else
			parseindex++;
	}

	if (pushback_index)
		return (pushback_buffer[--pushback_index]);

	if (quotec) {
		if ((c = getc(file->stream)) == EOF) {
			yyerror("reached end of file while parsing "
			    "quoted string");
			if (file == topfile || popfile() == EOF)
				return (EOF);
			return (quotec);
		}
		return (c);
	}

	while ((c = getc(file->stream)) == '\\') {
		next = getc(file->stream);
		if (next != '\n') {
			c = next;
			break;
		}
		yylval.lineno = file->lineno;
		file->lineno++;
	}

	while (c == EOF) {
		if (file == topfile || popfile() == EOF)
			return (EOF);
		c = getc(file->stream);
	}
	return (c);
}

int
lungetc(int c)
{
	if (c == EOF)
		return (EOF);
	if (parsebuf) {
		parseindex--;
		if (parseindex >= 0)
			return (c);
	}
	if (pushback_index < MAXPUSHBACK-1)
		return (pushback_buffer[pushback_index++] = c);
	else
		return (EOF);
}

int
findeol(void)
{
	int	c;

	parsebuf = NULL;

	/* skip to either EOF or the first real EOL */
	while (1) {
		if (pushback_index)
			c = pushback_buffer[--pushback_index];
		else
			c = lgetc(0);
		if (c == '\n') {
			file->lineno++;
			break;
		}
		if (c == EOF)
			break;
	}
	return (ERROR);
}

int
yylex(void)
{
	u_char	 buf[8096];
	u_char	*p;
	int	 quotec, next, c;
	int	 token;

	p = buf;
	while ((c = lgetc(0)) == ' ' || c == '\t')
		; /* nothing */

	yylval.lineno = file->lineno;
	if (c == '#')
		while ((c = lgetc(0)) != '\n' && c != EOF)
			; /* nothing */

	switch (c) {
	case '\'':
	case '"':
		quotec = c;
		while (1) {
			if ((c = lgetc(quotec)) == EOF)
				return (0);
			if (c == '\n') {
				file->lineno++;
				continue;
			} else if (c == '\\') {
				if ((next = lgetc(quotec)) == EOF)
					return (0);
				if (next == quotec || c == ' ' || c == '\t')
					c = next;
				else if (next == '\n') {
					file->lineno++;
					continue;
				} else
					lungetc(next);
			} else if (c == quotec) {
				*p = '\0';
				break;
			} else if (c == '\0') {
				yyerror("syntax error");
				return (findeol());
			}
			if (p + 1 >= buf + sizeof(buf) - 1) {
				yyerror("string too long");
				return (findeol());
			}
			*p++ = c;
		}
		yylval.v.string = xstrdup(buf);
		return (STRING);
	}

#define allowed_to_end_number(x) \
	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')

	if (c == '-' || isdigit(c)) {
		do {
			*p++ = c;
			if ((unsigned)(p-buf) >= sizeof(buf)) {
				yyerror("string too long");
				return (findeol());
			}
		} while ((c = lgetc(0)) != EOF && isdigit(c));
		lungetc(c);
		if (p == buf + 1 && buf[0] == '-')
			goto nodigits;
		if (c == EOF || allowed_to_end_number(c)) {
			const char *errstr = NULL;

			*p = '\0';
			yylval.v.number = strtonum(buf, LLONG_MIN,
			    LLONG_MAX, &errstr);
			if (errstr) {
				yyerror("\"%s\" invalid number: %s",
				    buf, errstr);
				return (findeol());
			}
			return (NUMBER);
		} else {
nodigits:
			while (p > buf + 1)
				lungetc(*--p);
			c = *--p;
			if (c == '-')
				return (c);
		}
	}

/* Similar to other parse.y copies, but also allows '/' in strings */
#define allowed_in_string(x) \
	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
	x != '{' && x != '}' && x != '<' && x != '>' && \
	x != '!' && x != '=' && x != '#' && x != ','))

	if (isalnum(c) || c == ':' || c == '_' || c == '*' || c == '/') {
		do {
			*p++ = c;
			if ((unsigned)(p-buf) >= sizeof(buf)) {
				yyerror("string too long");
				return (findeol());
			}
		} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
		lungetc(c);
		*p = '\0';
		if ((token = lookup(buf)) == STRING)
			yylval.v.string = xstrdup(buf);
		return (token);
	}
	if (c == '\n') {
		yylval.lineno = file->lineno;
		file->lineno++;
	}
	if (c == EOF)
		return (0);
	return (c);
}

struct file *
pushfile(const char *name)
{
	struct file	*nfile;

	nfile = xcalloc(1, sizeof(struct file));
	nfile->name = xstrdup(name);

	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
		warn("%s", nfile->name);
		free(nfile->name);
		free(nfile);
		return (NULL);
	}
	nfile->lineno = 1;
	TAILQ_INSERT_TAIL(&files, nfile, entry);
	return (nfile);
}

int
popfile(void)
{
	struct file	*prev;

	if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
		prev->errors += file->errors;

	TAILQ_REMOVE(&files, file, entry);
	fclose(file->stream);
	free(file->name);
	free(file);
	file = prev;
	return (file ? 0 : EOF);
}

int
parse_config(const char *filename, struct conf *xconf)
{
	int		 errors = 0;

	conf = xconf;

	if ((file = pushfile(filename)) == NULL) {
		return (-1);
	}
	topfile = file;

	yyparse();
	errors = file->errors;
	popfile();

	return (errors ? -1 : 0);
}