preproc.c 17.5 KB
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763
/*
 * Copyright 1998 Bertho A. Stultiens (BS)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"
#include "wine/port.h"

#include <assert.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_IO_H
# include <io.h>
#endif

#include "wine/wpp.h"
#include "wpp_private.h"

struct pp_status pp_status;

#define HASHKEY		2039

typedef struct pp_def_state
{
    struct pp_def_state *next;
    pp_entry_t          *defines[HASHKEY];
} pp_def_state_t;

static pp_def_state_t *pp_def_state;

#define MAXIFSTACK	64
static pp_if_state_t if_stack[MAXIFSTACK];
static int if_stack_idx = 0;

#if 0
void pp_print_status(void) __attribute__((destructor));
void pp_print_status(void)
{
	int i;
	int sum;
	int total = 0;
	pp_entry_t *ppp;

	fprintf(stderr, "Defines statistics:\n");
	for(i = 0; i < HASHKEY; i++)
	{
		sum = 0;
		for(ppp = pp_def_state->defines[i]; ppp; ppp = ppp->next)
			sum++;
		total += sum;
		if (sum) fprintf(stderr, "%4d, %3d\n", i, sum);
	}
	fprintf(stderr, "Total defines: %d\n", total);
}
#endif

void *pp_xmalloc(size_t size)
{
    void *res;

    assert(size > 0);
    res = malloc(size);
    if(res == NULL)
    {
        /* Set the error flag */
        pp_status.state = 1;
    }
    return res;
}

void *pp_xrealloc(void *p, size_t size)
{
    void *res;

    assert(size > 0);
    res = realloc(p, size);
    if(res == NULL)
    {
        /* Set the error flag */
        pp_status.state = 1;
    }
    return res;
}

char *pp_xstrdup(const char *str)
{
	char *s;
	int len;

	assert(str != NULL);
	len = strlen(str)+1;
	s = pp_xmalloc(len);
	if(!s)
		return NULL;
	return memcpy(s, str, len);
}

static char *wpp_default_lookup(const char *name, int type, const char *parent_name,
                                char **include_path, int include_path_count)
{
    char *cpy;
    char *cptr;
    char *path;
    const char *ccptr;
    int i, fd;

    cpy = pp_xmalloc(strlen(name)+1);
    if(!cpy)
        return NULL;
    cptr = cpy;

    for(ccptr = name; *ccptr; ccptr++)
    {
        /* Convert to forward slash */
        if(*ccptr == '\\') {
            /* kill double backslash */
            if(ccptr[1] == '\\')
                ccptr++;
            *cptr = '/';
        }else {
            *cptr = *ccptr;
        }
        cptr++;
    }
    *cptr = '\0';

    if(type && parent_name)
    {
        /* Search directory of parent include and then -I path */
        const char *p;

        if ((p = strrchr( parent_name, '/' ))) p++;
        else p = parent_name;
        path = pp_xmalloc( (p - parent_name) + strlen(cpy) + 1 );
        if(!path)
        {
            free(cpy);
            return NULL;
        }
        memcpy( path, parent_name, p - parent_name );
        strcpy( path + (p - parent_name), cpy );
        fd = open( path, O_RDONLY );
        if (fd != -1)
        {
            close( fd );
            free( cpy );
            return path;
        }
        free( path );
    }
    /* Search -I path */
    for(i = 0; i < include_path_count; i++)
    {
        path = pp_xmalloc(strlen(include_path[i]) + strlen(cpy) + 2);
        if(!path)
        {
            free(cpy);
            return NULL;
        }
        strcpy(path, include_path[i]);
        strcat(path, "/");
        strcat(path, cpy);
        fd = open( path, O_RDONLY );
        if (fd != -1)
        {
            close( fd );
            free( cpy );
            return path;
        }
        free( path );
    }
    free( cpy );
    return NULL;
}

static void *wpp_default_open(const char *filename, int type) {
    return fopen(filename,"rt");
}

static void wpp_default_close(void *file) {
    fclose(file);
}

static int wpp_default_read(void *file, char *buffer, unsigned int len){
    return fread(buffer, 1, len, file);
}

static void wpp_default_write( const char *buffer, unsigned int len ) {
    fwrite(buffer, 1, len, ppy_out);
}

/* Don't comment on the hash, it's primitive but functional... */
static int pphash(const char *str)
{
	int sum = 0;
	while(*str)
		sum += *str++;
	return sum % HASHKEY;
}

pp_entry_t *pplookup(const char *ident)
{
	int idx;
	pp_entry_t *ppp;

	if(!ident)
		return NULL;
	idx = pphash(ident);
	for(ppp = pp_def_state->defines[idx]; ppp; ppp = ppp->next)
	{
		if(!strcmp(ident, ppp->ident))
			return ppp;
	}
	return NULL;
}

static void free_pp_entry( pp_entry_t *ppp, int idx )
{
	if(ppp->iep)
	{
		if(ppp->iep == pp_includelogiclist)
		{
			pp_includelogiclist = ppp->iep->next;
			if(pp_includelogiclist)
				pp_includelogiclist->prev = NULL;
		}
		else
		{
			ppp->iep->prev->next = ppp->iep->next;
			if(ppp->iep->next)
				ppp->iep->next->prev = ppp->iep->prev;
		}
		free(ppp->iep->filename);
		free(ppp->iep);
	}

	if(pp_def_state->defines[idx] == ppp)
	{
		pp_def_state->defines[idx] = ppp->next;
		if(pp_def_state->defines[idx])
			pp_def_state->defines[idx]->prev = NULL;
	}
	else
	{
		ppp->prev->next = ppp->next;
		if(ppp->next)
			ppp->next->prev = ppp->prev;
	}

	free(ppp);
}

/* push a new (empty) define state */
int pp_push_define_state(void)
{
    pp_def_state_t *state = pp_xmalloc( sizeof(*state) );
    if(!state)
        return 1;

    memset( state->defines, 0, sizeof(state->defines) );
    state->next = pp_def_state;
    pp_def_state = state;
    return 0;
}

/* pop the current define state */
void pp_pop_define_state(void)
{
    int i;
    pp_entry_t *ppp;
    pp_def_state_t *state;

    for (i = 0; i < HASHKEY; i++)
    {
        while ((ppp = pp_def_state->defines[i]) != NULL) pp_del_define( ppp->ident );
    }
    state = pp_def_state;
    pp_def_state = state->next;
    free( state );
}

void pp_del_define(const char *name)
{
	pp_entry_t *ppp;
	int idx = pphash(name);

	if((ppp = pplookup(name)) == NULL)
	{
		if(pp_status.pedantic)
			ppy_warning("%s was not defined", name);
		return;
	}

	if(pp_status.debug)
		printf("Deleting (%s, %d) <%s>\n", pp_status.input, pp_status.line_number, name);

	free( ppp->ident );
	free( ppp->subst.text );
	free( ppp->filename );
	free_pp_entry( ppp, idx );
}

pp_entry_t *pp_add_define(const char *def, const char *text)
{
	int len;
	char *cptr;
	int idx;
	pp_entry_t *ppp;

	if(!def)
		return NULL;
	idx = pphash(def);
	if((ppp = pplookup(def)) != NULL)
	{
		if(pp_status.pedantic)
			ppy_warning("Redefinition of %s\n\tPrevious definition: %s:%d", def, ppp->filename, ppp->linenumber);
		pp_del_define(def);
	}
	ppp = pp_xmalloc(sizeof(pp_entry_t));
	if(!ppp)
		return NULL;
	memset( ppp, 0, sizeof(*ppp) );
	ppp->ident = pp_xstrdup(def);
	if(!ppp->ident)
		goto error;
	ppp->type = def_define;
	ppp->subst.text = text ? pp_xstrdup(text) : NULL;
	if(text && !ppp->subst.text)
		goto error;
	ppp->filename = pp_xstrdup(pp_status.input ? pp_status.input : "<internal or cmdline>");
	if(!ppp->filename)
		goto error;
	ppp->linenumber = pp_status.input ? pp_status.line_number : 0;
	ppp->next = pp_def_state->defines[idx];
	pp_def_state->defines[idx] = ppp;
	if(ppp->next)
		ppp->next->prev = ppp;
	if(ppp->subst.text)
	{
		/* Strip trailing white space from subst text */
		len = strlen(ppp->subst.text);
		while(len && strchr(" \t\r\n", ppp->subst.text[len-1]))
		{
			ppp->subst.text[--len] = '\0';
		}
		/* Strip leading white space from subst text */
		for(cptr = ppp->subst.text; *cptr && strchr(" \t\r", *cptr); cptr++)
		;
		if(ppp->subst.text != cptr)
			memmove(ppp->subst.text, cptr, strlen(cptr)+1);
	}
	if(pp_status.debug)
		printf("Added define (%s, %d) <%s> to <%s>\n", pp_status.input, pp_status.line_number, ppp->ident, ppp->subst.text ? ppp->subst.text : "(null)");

	return ppp;

error:
	free(ppp->ident);
	free(ppp->subst.text);
	free(ppp);
	return NULL;
}

pp_entry_t *pp_add_macro(char *id, marg_t *args[], int nargs, mtext_t *exp)
{
	int idx;
	pp_entry_t *ppp;

	if(!id)
		return NULL;
	idx = pphash(id);
	if((ppp = pplookup(id)) != NULL)
	{
		if(pp_status.pedantic)
			ppy_warning("Redefinition of %s\n\tPrevious definition: %s:%d", id, ppp->filename, ppp->linenumber);
		pp_del_define(id);
	}
	ppp = pp_xmalloc(sizeof(pp_entry_t));
	if(!ppp)
		return NULL;
	memset( ppp, 0, sizeof(*ppp) );
	ppp->ident	= id;
	ppp->type	= def_macro;
	ppp->margs	= args;
	ppp->nargs	= nargs;
	ppp->subst.mtext= exp;
	ppp->filename = pp_xstrdup(pp_status.input ? pp_status.input : "<internal or cmdline>");
	if(!ppp->filename)
	{
		free(ppp);
		return NULL;
	}
	ppp->linenumber = pp_status.input ? pp_status.line_number : 0;
	ppp->next	= pp_def_state->defines[idx];
	pp_def_state->defines[idx] = ppp;
	if(ppp->next)
		ppp->next->prev = ppp;

	if(pp_status.debug)
	{
		fprintf(stderr, "Added macro (%s, %d) <%s(%d)> to <", pp_status.input, pp_status.line_number, ppp->ident, nargs);
		for(; exp; exp = exp->next)
		{
			switch(exp->type)
			{
			case exp_text:
				fprintf(stderr, " \"%s\" ", exp->subst.text);
				break;
			case exp_stringize:
				fprintf(stderr, " #(%d) ", exp->subst.argidx);
				break;
			case exp_concat:
				fprintf(stderr, "##");
				break;
			case exp_subst:
				fprintf(stderr, " <%d> ", exp->subst.argidx);
				break;
			}
		}
		fprintf(stderr, ">\n");
	}
	return ppp;
}


/*
 *-------------------------------------------------------------------------
 * Include management
 *-------------------------------------------------------------------------
 */
#if defined(_WIN32) || defined(__MSDOS__)
#define INCLUDESEPARATOR	";"
#else
#define INCLUDESEPARATOR	":"
#endif

static char **includepath;
static int nincludepath = 0;

int wpp_add_include_path(const char *path)
{
	char *tok;
	char *cpy = pp_xstrdup(path);
	if(!cpy)
		return 1;

	tok = strtok(cpy, INCLUDESEPARATOR);
	while(tok)
	{
		if(*tok) {
			char *dir;
			char *cptr;
			char **new_path;

			dir = pp_xstrdup(tok);
			if(!dir)
			{
				free(cpy);
				return 1;
			}
			for(cptr = dir; *cptr; cptr++)
			{
				/* Convert to forward slash */
				if(*cptr == '\\')
					*cptr = '/';
			}
			/* Kill eventual trailing '/' */
			if(*(cptr = dir + strlen(dir)-1) == '/')
				*cptr = '\0';

			/* Add to list */
			new_path = pp_xrealloc(includepath, (nincludepath+1) * sizeof(*includepath));
			if(!new_path)
			{
				free(dir);
				free(cpy);
				return 1;
			}
			includepath = new_path;
			includepath[nincludepath] = dir;
			nincludepath++;
		}
		tok = strtok(NULL, INCLUDESEPARATOR);
	}
	free(cpy);
	return 0;
}

char *wpp_find_include(const char *name, const char *parent_name)
{
    return wpp_default_lookup(name, !!parent_name, parent_name, includepath, nincludepath);
}

void *pp_open_include(const char *name, int type, const char *parent_name, char **newpath)
{
    char *path;
    void *fp;

    if (!(path = wpp_callbacks->lookup(name, type, parent_name, includepath,
                                       nincludepath))) return NULL;
    fp = wpp_callbacks->open(path, type);

    if (fp)
    {
        if (pp_status.debug)
            printf("Going to include <%s>\n", path);
        if (newpath) *newpath = path;
        else free( path );
        return fp;
    }
    free( path );
    return NULL;
}

/*
 *-------------------------------------------------------------------------
 * #if, #ifdef, #ifndef, #else, #elif and #endif state management
 *
 * #if state transitions are made on basis of the current TOS and the next
 * required state. The state transitions are required to housekeep because
 * #if:s can be nested. The ignore case is activated to prevent output from
 * within a false clause.
 * Some special cases come from the fact that the #elif cases are not
 * binary, but three-state. The problem is that all other elif-cases must
 * be false when one true one has been found. A second problem is that the
 * #else clause is a final clause. No extra #else:s may follow.
 *
 * The states mean:
 * if_true	Process input to output
 * if_false	Process input but no output
 * if_ignore	Process input but no output
 * if_elif	Process input but no output
 * if_elsefalse	Process input but no output
 * if_elsettrue	Process input to output
 *
 * The possible state-sequences are [state(stack depth)] (rest can be deduced):
 *	TOS		#if 1		#else			#endif
 *	if_true(n)	if_true(n+1)	if_elsefalse(n+1)
 *	if_false(n)	if_ignore(n+1)	if_ignore(n+1)
 *	if_elsetrue(n)	if_true(n+1)	if_elsefalse(n+1)
 *	if_elsefalse(n)	if_ignore(n+1)	if_ignore(n+1)
 *	if_elif(n)	if_ignore(n+1)	if_ignore(n+1)
 *	if_ignore(n)	if_ignore(n+1)	if_ignore(n+1)
 *
 *	TOS		#if 1		#elif 0		#else		#endif
 *	if_true(n)	if_true(n+1)	if_elif(n+1)	if_elif(n+1)
 *	if_false(n)	if_ignore(n+1)	if_ignore(n+1)	if_ignore(n+1)
 *	if_elsetrue(n)	if_true(n+1)	if_elif(n+1)	if_elif(n+1)
 *	if_elsefalse(n)	if_ignore(n+1)	if_ignore(n+1)	if_ignore(n+1)
 *	if_elif(n)	if_ignore(n+1)	if_ignore(n+1)	if_ignore(n+1)
 *	if_ignore(n)	if_ignore(n+1)	if_ignore(n+1)	if_ignore(n+1)
 *
 *	TOS		#if 0		#elif 1		#else		#endif
 *	if_true(n)	if_false(n+1)	if_true(n+1)	if_elsefalse(n+1)
 *	if_false(n)	if_ignore(n+1)	if_ignore(n+1)	if_ignore(n+1)
 *	if_elsetrue(n)	if_false(n+1)	if_true(n+1)	if_elsefalse(n+1)
 *	if_elsefalse(n)	if_ignore(n+1)	if_ignore(n+1)	if_ignore(n+1)
 *	if_elif(n)	if_ignore(n+1)	if_ignore(n+1)	if_ignore(n+1)
 *	if_ignore(n)	if_ignore(n+1)	if_ignore(n+1)	if_ignore(n+1)
 *
 *-------------------------------------------------------------------------
 */
static const char * const pp_if_state_str[] = {
	"if_false",
	"if_true",
	"if_elif",
	"if_elsefalse",
	"if_elsetrue",
	"if_ignore"
};

void pp_push_if(pp_if_state_t s)
{
	if(if_stack_idx >= MAXIFSTACK)
		pp_internal_error(__FILE__, __LINE__, "#if-stack overflow; #{if,ifdef,ifndef} nested too deeply (> %d)", MAXIFSTACK);

	if(pp_flex_debug)
		fprintf(stderr, "Push if %s:%d: %s(%d) -> %s(%d)\n", pp_status.input, pp_status.line_number, pp_if_state_str[pp_if_state()], if_stack_idx, pp_if_state_str[s], if_stack_idx+1);

	if_stack[if_stack_idx++] = s;

	switch(s)
	{
	case if_true:
	case if_elsetrue:
		break;
	case if_false:
	case if_elsefalse:
	case if_elif:
	case if_ignore:
		pp_push_ignore_state();
		break;
	default:
		pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d)", (int)pp_if_state());
	}
}

pp_if_state_t pp_pop_if(void)
{
	if(if_stack_idx <= 0)
	{
		ppy_error("#{endif,else,elif} without #{if,ifdef,ifndef} (#if-stack underflow)");
		return if_error;
	}

	switch(pp_if_state())
	{
	case if_true:
	case if_elsetrue:
		break;
	case if_false:
	case if_elsefalse:
	case if_elif:
	case if_ignore:
		pp_pop_ignore_state();
		break;
	default:
		pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d)", (int)pp_if_state());
	}

	if(pp_flex_debug)
		fprintf(stderr, "Pop if %s:%d: %s(%d) -> %s(%d)\n",
				pp_status.input,
				pp_status.line_number,
				pp_if_state_str[pp_if_state()],
				if_stack_idx,
				pp_if_state_str[if_stack[if_stack_idx <= 1 ? if_true : if_stack_idx-2]],
				if_stack_idx-1);

	return if_stack[--if_stack_idx];
}

pp_if_state_t pp_if_state(void)
{
	if(!if_stack_idx)
		return if_true;
	else
		return if_stack[if_stack_idx-1];
}


void pp_next_if_state(int i)
{
	switch(pp_if_state())
	{
	case if_true:
	case if_elsetrue:
		pp_push_if(i ? if_true : if_false);
		break;
	case if_false:
	case if_elsefalse:
	case if_elif:
	case if_ignore:
		pp_push_if(if_ignore);
		break;
	default:
		pp_internal_error(__FILE__, __LINE__, "Invalid pp_if_state (%d) in #{if,ifdef,ifndef} directive", (int)pp_if_state());
	}
}

int pp_get_if_depth(void)
{
	return if_stack_idx;
}

/* #define WANT_NEAR_INDICATION */

static void generic_msg(const char *s, const char *t, const char *n, va_list ap)
{
	fprintf(stderr, "%s:%d:%d: %s: ", pp_status.input ? pp_status.input : "stdin",
                pp_status.line_number, pp_status.char_number, t);
	vfprintf(stderr, s, ap);
#ifdef WANT_NEAR_INDICATION
	{
		char *cpy, *p;
		if(n)
		{
			cpy = pp_xstrdup(n);
			if(!cpy)
				goto end;
			for (p = cpy; *p; p++) if(!isprint(*p)) *p = ' ';
			fprintf(stderr, " near '%s'", cpy);
			free(cpy);
		}
	}
end:
#endif
	fprintf(stderr, "\n");
}

static void wpp_default_error(const char *file, int line, int col, const char *near, const char *msg, va_list ap)
{
	generic_msg(msg, "Error", near, ap);
	exit(1);
}

static void wpp_default_warning(const char *file, int line, int col, const char *near, const char *msg, va_list ap)
{
	generic_msg(msg, "Warning", near, ap);
}

static const struct wpp_callbacks default_callbacks =
{
	wpp_default_lookup,
	wpp_default_open,
	wpp_default_close,
	wpp_default_read,
	wpp_default_write,
	wpp_default_error,
	wpp_default_warning,
};

const struct wpp_callbacks *wpp_callbacks = &default_callbacks;

int ppy_error(const char *s, ...)
{
	va_list ap;
	va_start(ap, s);
	wpp_callbacks->error(pp_status.input, pp_status.line_number, pp_status.char_number, ppy_text, s, ap);
	va_end(ap);
	pp_status.state = 1;
	return 1;
}

int ppy_warning(const char *s, ...)
{
	va_list ap;
	va_start(ap, s);
	wpp_callbacks->warning(pp_status.input, pp_status.line_number, pp_status.char_number, ppy_text, s, ap);
	va_end(ap);
	return 0;
}

void pp_internal_error(const char *file, int line, const char *s, ...)
{
	va_list ap;
	va_start(ap, s);
	fprintf(stderr, "Internal error (please report) %s %d: ", file, line);
	vfprintf(stderr, s, ap);
	fprintf(stderr, "\n");
	va_end(ap);
	exit(3);
}