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      1 /* Copyright (C) 1989, 2000 Aladdin Enterprises.  All rights reserved. */
      2 
      3 /*$Id: ansi2knr.c,v 1.3 2000/04/13 03:41:48 lpd Exp $*/
      4 /* Convert ANSI C function definitions to K&R ("traditional C") syntax */
      5 
      6 /*
      7 ansi2knr is distributed in the hope that it will be useful, but WITHOUT ANY
      8 WARRANTY.  No author or distributor accepts responsibility to anyone for the
      9 consequences of using it or for whether it serves any particular purpose or
     10 works at all, unless he says so in writing.  Refer to the GNU General Public
     11 License (the "GPL") for full details.
     12 
     13 Everyone is granted permission to copy, modify and redistribute ansi2knr,
     14 but only under the conditions described in the GPL.  A copy of this license
     15 is supposed to have been given to you along with ansi2knr so you can know
     16 your rights and responsibilities.  It should be in a file named COPYLEFT,
     17 or, if there is no file named COPYLEFT, a file named COPYING.  Among other
     18 things, the copyright notice and this notice must be preserved on all
     19 copies.
     20 
     21 We explicitly state here what we believe is already implied by the GPL: if
     22 the ansi2knr program is distributed as a separate set of sources and a
     23 separate executable file which are aggregated on a storage medium together
     24 with another program, this in itself does not bring the other program under
     25 the GPL, nor does the mere fact that such a program or the procedures for
     26 constructing it invoke the ansi2knr executable bring any other part of the
     27 program under the GPL.
     28 */
     29 
     30 /*
     31  * Usage:
     32 	ansi2knr [--filename FILENAME] [INPUT_FILE [OUTPUT_FILE]]
     33  * --filename provides the file name for the #line directive in the output,
     34  * overriding input_file (if present).
     35  * If no input_file is supplied, input is read from stdin.
     36  * If no output_file is supplied, output goes to stdout.
     37  * There are no error messages.
     38  *
     39  * ansi2knr recognizes function definitions by seeing a non-keyword
     40  * identifier at the left margin, followed by a left parenthesis, with a
     41  * right parenthesis as the last character on the line, and with a left
     42  * brace as the first token on the following line (ignoring possible
     43  * intervening comments and/or preprocessor directives), except that a line
     44  * consisting of only
     45  *	identifier1(identifier2)
     46  * will not be considered a function definition unless identifier2 is
     47  * the word "void", and a line consisting of
     48  *	identifier1(identifier2, <<arbitrary>>)
     49  * will not be considered a function definition.
     50  * ansi2knr will recognize a multi-line header provided that no intervening
     51  * line ends with a left or right brace or a semicolon.  These algorithms
     52  * ignore whitespace, comments, and preprocessor directives, except that
     53  * the function name must be the first thing on the line.  The following
     54  * constructs will confuse it:
     55  *	- Any other construct that starts at the left margin and
     56  *	    follows the above syntax (such as a macro or function call).
     57  *	- Some macros that tinker with the syntax of function headers.
     58  */
     59 
     60 /*
     61  * The original and principal author of ansi2knr is L. Peter Deutsch
     62  * <ghost (at) aladdin.com>.  Other authors are noted in the change history
     63  * that follows (in reverse chronological order):
     64 
     65 	lpd 2000-04-12 backs out Eggert's changes because of bugs:
     66 	- concatlits didn't declare the type of its bufend argument;
     67 	- concatlits didn't recognize when it was inside a comment;
     68 	- scanstring could scan backward past the beginning of the string; when
     69 	- the check for \ + newline in scanstring was unnecessary.
     70 
     71 	2000-03-05  Paul Eggert  <eggert (at) twinsun.com>
     72 
     73 	Add support for concatenated string literals.
     74 	* ansi2knr.c (concatlits): New decl.
     75 	(main): Invoke concatlits to concatenate string literals.
     76 	(scanstring): Handle backslash-newline correctly.  Work with
     77 	character constants.  Fix bug when scanning backwards through
     78 	backslash-quote.  Check for unterminated strings.
     79 	(convert1): Parse character constants, too.
     80 	(appendline, concatlits): New functions.
     81 	* ansi2knr.1: Document this.
     82 
     83 	lpd 1999-08-17 added code to allow preprocessor directives
     84 		wherever comments are allowed
     85 	lpd 1999-04-12 added minor fixes from Pavel Roskin
     86 		<pavel_roskin (at) geocities.com> for clean compilation with
     87 		gcc -W -Wall
     88 	lpd 1999-03-22 added hack to recognize lines consisting of
     89 		identifier1(identifier2, xxx) as *not* being procedures
     90 	lpd 1999-02-03 made indentation of preprocessor commands consistent
     91 	lpd 1999-01-28 fixed two bugs: a '/' in an argument list caused an
     92 		endless loop; quoted strings within an argument list
     93 		confused the parser
     94 	lpd 1999-01-24 added a check for write errors on the output,
     95 		suggested by Jim Meyering <meyering (at) ascend.com>
     96 	lpd 1998-11-09 added further hack to recognize identifier(void)
     97 		as being a procedure
     98 	lpd 1998-10-23 added hack to recognize lines consisting of
     99 		identifier1(identifier2) as *not* being procedures
    100 	lpd 1997-12-08 made input_file optional; only closes input and/or
    101 		output file if not stdin or stdout respectively; prints
    102 		usage message on stderr rather than stdout; adds
    103 		--filename switch (changes suggested by
    104 		<ceder (at) lysator.liu.se>)
    105 	lpd 1996-01-21 added code to cope with not HAVE_CONFIG_H and with
    106 		compilers that don't understand void, as suggested by
    107 		Tom Lane
    108 	lpd 1996-01-15 changed to require that the first non-comment token
    109 		on the line following a function header be a left brace,
    110 		to reduce sensitivity to macros, as suggested by Tom Lane
    111 		<tgl (at) sss.pgh.pa.us>
    112 	lpd 1995-06-22 removed #ifndefs whose sole purpose was to define
    113 		undefined preprocessor symbols as 0; changed all #ifdefs
    114 		for configuration symbols to #ifs
    115 	lpd 1995-04-05 changed copyright notice to make it clear that
    116 		including ansi2knr in a program does not bring the entire
    117 		program under the GPL
    118 	lpd 1994-12-18 added conditionals for systems where ctype macros
    119 		don't handle 8-bit characters properly, suggested by
    120 		Francois Pinard <pinard (at) iro.umontreal.ca>;
    121 		removed --varargs switch (this is now the default)
    122 	lpd 1994-10-10 removed CONFIG_BROKETS conditional
    123 	lpd 1994-07-16 added some conditionals to help GNU `configure',
    124 		suggested by Francois Pinard <pinard (at) iro.umontreal.ca>;
    125 		properly erase prototype args in function parameters,
    126 		contributed by Jim Avera <jima (at) netcom.com>;
    127 		correct error in writeblanks (it shouldn't erase EOLs)
    128 	lpd 1989-xx-xx original version
    129  */
    130 
    131 /* Most of the conditionals here are to make ansi2knr work with */
    132 /* or without the GNU configure machinery. */
    133 
    134 #if HAVE_CONFIG_H
    135 # include <config.h>
    136 #endif
    137 
    138 #include <stdio.h>
    139 #include <ctype.h>
    140 
    141 #if HAVE_CONFIG_H
    142 
    143 /*
    144    For properly autoconfiguring ansi2knr, use AC_CONFIG_HEADER(config.h).
    145    This will define HAVE_CONFIG_H and so, activate the following lines.
    146  */
    147 
    148 # if STDC_HEADERS || HAVE_STRING_H
    149 #  include <string.h>
    150 # else
    151 #  include <strings.h>
    152 # endif
    153 
    154 #else /* not HAVE_CONFIG_H */
    155 
    156 /* Otherwise do it the hard way */
    157 
    158 # ifdef BSD
    159 #  include <strings.h>
    160 # else
    161 #  ifdef VMS
    162     extern int strlen(), strncmp();
    163 #  else
    164 #   include <string.h>
    165 #  endif
    166 # endif
    167 
    168 #endif /* not HAVE_CONFIG_H */
    169 
    170 #if STDC_HEADERS
    171 # include <stdlib.h>
    172 #else
    173 /*
    174    malloc and free should be declared in stdlib.h,
    175    but if you've got a K&R compiler, they probably aren't.
    176  */
    177 # ifdef MSDOS
    178 #  include <malloc.h>
    179 # else
    180 #  ifdef VMS
    181      extern char *malloc();
    182      extern void free();
    183 #  else
    184      extern char *malloc();
    185      extern int free();
    186 #  endif
    187 # endif
    188 
    189 #endif
    190 
    191 /* Define NULL (for *very* old compilers). */
    192 #ifndef NULL
    193 # define NULL (0)
    194 #endif
    195 
    196 /*
    197  * The ctype macros don't always handle 8-bit characters correctly.
    198  * Compensate for this here.
    199  */
    200 #ifdef isascii
    201 # undef HAVE_ISASCII		/* just in case */
    202 # define HAVE_ISASCII 1
    203 #else
    204 #endif
    205 #if STDC_HEADERS || !HAVE_ISASCII
    206 # define is_ascii(c) 1
    207 #else
    208 # define is_ascii(c) isascii(c)
    209 #endif
    210 
    211 #define is_space(c) (is_ascii(c) && isspace(c))
    212 #define is_alpha(c) (is_ascii(c) && isalpha(c))
    213 #define is_alnum(c) (is_ascii(c) && isalnum(c))
    214 
    215 /* Scanning macros */
    216 #define isidchar(ch) (is_alnum(ch) || (ch) == '_')
    217 #define isidfirstchar(ch) (is_alpha(ch) || (ch) == '_')
    218 
    219 /* Forward references */
    220 char *ppdirforward();
    221 char *ppdirbackward();
    222 char *skipspace();
    223 char *scanstring();
    224 int writeblanks();
    225 int test1();
    226 int convert1();
    227 
    228 /* The main program */
    229 int
    230 main(argc, argv)
    231     int argc;
    232     char *argv[];
    233 {	FILE *in = stdin;
    234 	FILE *out = stdout;
    235 	char *filename = 0;
    236 	char *program_name = argv[0];
    237 	char *output_name = 0;
    238 #define bufsize 5000			/* arbitrary size */
    239 	char *buf;
    240 	char *line;
    241 	char *more;
    242 	char *usage =
    243 	  "Usage: ansi2knr [--filename FILENAME] [INPUT_FILE [OUTPUT_FILE]]\n";
    244 	/*
    245 	 * In previous versions, ansi2knr recognized a --varargs switch.
    246 	 * If this switch was supplied, ansi2knr would attempt to convert
    247 	 * a ... argument to va_alist and va_dcl; if this switch was not
    248 	 * supplied, ansi2knr would simply drop any such arguments.
    249 	 * Now, ansi2knr always does this conversion, and we only
    250 	 * check for this switch for backward compatibility.
    251 	 */
    252 	int convert_varargs = 1;
    253 	int output_error;
    254 
    255 	while ( argc > 1 && argv[1][0] == '-' ) {
    256 	  if ( !strcmp(argv[1], "--varargs") ) {
    257 	    convert_varargs = 1;
    258 	    argc--;
    259 	    argv++;
    260 	    continue;
    261 	  }
    262 	  if ( !strcmp(argv[1], "--filename") && argc > 2 ) {
    263 	    filename = argv[2];
    264 	    argc -= 2;
    265 	    argv += 2;
    266 	    continue;
    267 	  }
    268 	  fprintf(stderr, "%s: Unrecognized switch: %s\n", program_name,
    269 		  argv[1]);
    270 	  fprintf(stderr, usage);
    271 	  exit(1);
    272 	}
    273 	switch ( argc )
    274 	   {
    275 	default:
    276 		fprintf(stderr, usage);
    277 		exit(0);
    278 	case 3:
    279 		output_name = argv[2];
    280 		out = fopen(output_name, "w");
    281 		if ( out == NULL ) {
    282 		  fprintf(stderr, "%s: Cannot open output file %s\n",
    283 			  program_name, output_name);
    284 		  exit(1);
    285 		}
    286 		/* falls through */
    287 	case 2:
    288 		in = fopen(argv[1], "r");
    289 		if ( in == NULL ) {
    290 		  fprintf(stderr, "%s: Cannot open input file %s\n",
    291 			  program_name, argv[1]);
    292 		  exit(1);
    293 		}
    294 		if ( filename == 0 )
    295 		  filename = argv[1];
    296 		/* falls through */
    297 	case 1:
    298 		break;
    299 	   }
    300 	if ( filename )
    301 	  fprintf(out, "#line 1 \"%s\"\n", filename);
    302 	buf = malloc(bufsize);
    303 	if ( buf == NULL )
    304 	   {
    305 		fprintf(stderr, "Unable to allocate read buffer!\n");
    306 		exit(1);
    307 	   }
    308 	line = buf;
    309 	while ( fgets(line, (unsigned)(buf + bufsize - line), in) != NULL )
    310 	   {
    311 test:		line += strlen(line);
    312 		switch ( test1(buf) )
    313 		   {
    314 		case 2:			/* a function header */
    315 			convert1(buf, out, 1, convert_varargs);
    316 			break;
    317 		case 1:			/* a function */
    318 			/* Check for a { at the start of the next line. */
    319 			more = ++line;
    320 f:			if ( line >= buf + (bufsize - 1) ) /* overflow check */
    321 			  goto wl;
    322 			if ( fgets(line, (unsigned)(buf + bufsize - line), in) == NULL )
    323 			  goto wl;
    324 			switch ( *skipspace(ppdirforward(more), 1) )
    325 			  {
    326 			  case '{':
    327 			    /* Definitely a function header. */
    328 			    convert1(buf, out, 0, convert_varargs);
    329 			    fputs(more, out);
    330 			    break;
    331 			  case 0:
    332 			    /* The next line was blank or a comment: */
    333 			    /* keep scanning for a non-comment. */
    334 			    line += strlen(line);
    335 			    goto f;
    336 			  default:
    337 			    /* buf isn't a function header, but */
    338 			    /* more might be. */
    339 			    fputs(buf, out);
    340 			    strcpy(buf, more);
    341 			    line = buf;
    342 			    goto test;
    343 			  }
    344 			break;
    345 		case -1:		/* maybe the start of a function */
    346 			if ( line != buf + (bufsize - 1) ) /* overflow check */
    347 			  continue;
    348 			/* falls through */
    349 		default:		/* not a function */
    350 wl:			fputs(buf, out);
    351 			break;
    352 		   }
    353 		line = buf;
    354 	   }
    355 	if ( line != buf )
    356 	  fputs(buf, out);
    357 	free(buf);
    358 	if ( output_name ) {
    359 	  output_error = ferror(out);
    360 	  output_error |= fclose(out);
    361 	} else {		/* out == stdout */
    362 	  fflush(out);
    363 	  output_error = ferror(out);
    364 	}
    365 	if ( output_error ) {
    366 	  fprintf(stderr, "%s: error writing to %s\n", program_name,
    367 		  (output_name ? output_name : "stdout"));
    368 	  exit(1);
    369 	}
    370 	if ( in != stdin )
    371 	  fclose(in);
    372 	return 0;
    373 }
    374 
    375 /*
    376  * Skip forward or backward over one or more preprocessor directives.
    377  */
    378 char *
    379 ppdirforward(p)
    380     char *p;
    381 {
    382     for (; *p == '#'; ++p) {
    383 	for (; *p != '\r' && *p != '\n'; ++p)
    384 	    if (*p == 0)
    385 		return p;
    386 	if (*p == '\r' && p[1] == '\n')
    387 	    ++p;
    388     }
    389     return p;
    390 }
    391 char *
    392 ppdirbackward(p, limit)
    393     char *p;
    394     char *limit;
    395 {
    396     char *np = p;
    397 
    398     for (;; p = --np) {
    399 	if (*np == '\n' && np[-1] == '\r')
    400 	    --np;
    401 	for (; np > limit && np[-1] != '\r' && np[-1] != '\n'; --np)
    402 	    if (np[-1] == 0)
    403 		return np;
    404 	if (*np != '#')
    405 	    return p;
    406     }
    407 }
    408 
    409 /*
    410  * Skip over whitespace, comments, and preprocessor directives,
    411  * in either direction.
    412  */
    413 char *
    414 skipspace(p, dir)
    415     char *p;
    416     int dir;			/* 1 for forward, -1 for backward */
    417 {
    418     for ( ; ; ) {
    419 	while ( is_space(*p) )
    420 	    p += dir;
    421 	if ( !(*p == '/' && p[dir] == '*') )
    422 	    break;
    423 	p += dir;  p += dir;
    424 	while ( !(*p == '*' && p[dir] == '/') ) {
    425 	    if ( *p == 0 )
    426 		return p;	/* multi-line comment?? */
    427 	    p += dir;
    428 	}
    429 	p += dir;  p += dir;
    430     }
    431     return p;
    432 }
    433 
    434 /* Scan over a quoted string, in either direction. */
    435 char *
    436 scanstring(p, dir)
    437     char *p;
    438     int dir;
    439 {
    440     for (p += dir; ; p += dir)
    441 	if (*p == '"' && p[-dir] != '\\')
    442 	    return p + dir;
    443 }
    444 
    445 /*
    446  * Write blanks over part of a string.
    447  * Don't overwrite end-of-line characters.
    448  */
    449 int
    450 writeblanks(start, end)
    451     char *start;
    452     char *end;
    453 {	char *p;
    454 	for ( p = start; p < end; p++ )
    455 	  if ( *p != '\r' && *p != '\n' )
    456 	    *p = ' ';
    457 	return 0;
    458 }
    459 
    460 /*
    461  * Test whether the string in buf is a function definition.
    462  * The string may contain and/or end with a newline.
    463  * Return as follows:
    464  *	0 - definitely not a function definition;
    465  *	1 - definitely a function definition;
    466  *	2 - definitely a function prototype (NOT USED);
    467  *	-1 - may be the beginning of a function definition,
    468  *		append another line and look again.
    469  * The reason we don't attempt to convert function prototypes is that
    470  * Ghostscript's declaration-generating macros look too much like
    471  * prototypes, and confuse the algorithms.
    472  */
    473 int
    474 test1(buf)
    475     char *buf;
    476 {	char *p = buf;
    477 	char *bend;
    478 	char *endfn;
    479 	int contin;
    480 
    481 	if ( !isidfirstchar(*p) )
    482 	  return 0;		/* no name at left margin */
    483 	bend = skipspace(ppdirbackward(buf + strlen(buf) - 1, buf), -1);
    484 	switch ( *bend )
    485 	   {
    486 	   case ';': contin = 0 /*2*/; break;
    487 	   case ')': contin = 1; break;
    488 	   case '{': return 0;		/* not a function */
    489 	   case '}': return 0;		/* not a function */
    490 	   default: contin = -1;
    491 	   }
    492 	while ( isidchar(*p) )
    493 	  p++;
    494 	endfn = p;
    495 	p = skipspace(p, 1);
    496 	if ( *p++ != '(' )
    497 	  return 0;		/* not a function */
    498 	p = skipspace(p, 1);
    499 	if ( *p == ')' )
    500 	  return 0;		/* no parameters */
    501 	/* Check that the apparent function name isn't a keyword. */
    502 	/* We only need to check for keywords that could be followed */
    503 	/* by a left parenthesis (which, unfortunately, is most of them). */
    504 	   {	static char *words[] =
    505 		   {	"asm", "auto", "case", "char", "const", "double",
    506 			"extern", "float", "for", "if", "int", "long",
    507 			"register", "return", "short", "signed", "sizeof",
    508 			"static", "switch", "typedef", "unsigned",
    509 			"void", "volatile", "while", 0
    510 		   };
    511 		char **key = words;
    512 		char *kp;
    513 		unsigned len = endfn - buf;
    514 
    515 		while ( (kp = *key) != 0 )
    516 		   {	if ( strlen(kp) == len && !strncmp(kp, buf, len) )
    517 			  return 0;	/* name is a keyword */
    518 			key++;
    519 		   }
    520 	   }
    521 	   {
    522 	       char *id = p;
    523 	       int len;
    524 	       /*
    525 		* Check for identifier1(identifier2) and not
    526 		* identifier1(void), or identifier1(identifier2, xxxx).
    527 		*/
    528 
    529 	       while ( isidchar(*p) )
    530 		   p++;
    531 	       len = p - id;
    532 	       p = skipspace(p, 1);
    533 	       if (*p == ',' ||
    534 		   (*p == ')' && (len != 4 || strncmp(id, "void", 4)))
    535 		   )
    536 		   return 0;	/* not a function */
    537 	   }
    538 	/*
    539 	 * If the last significant character was a ), we need to count
    540 	 * parentheses, because it might be part of a formal parameter
    541 	 * that is a procedure.
    542 	 */
    543 	if (contin > 0) {
    544 	    int level = 0;
    545 
    546 	    for (p = skipspace(buf, 1); *p; p = skipspace(p + 1, 1))
    547 		level += (*p == '(' ? 1 : *p == ')' ? -1 : 0);
    548 	    if (level > 0)
    549 		contin = -1;
    550 	}
    551 	return contin;
    552 }
    553 
    554 /* Convert a recognized function definition or header to K&R syntax. */
    555 int
    556 convert1(buf, out, header, convert_varargs)
    557     char *buf;
    558     FILE *out;
    559     int header;			/* Boolean */
    560     int convert_varargs;	/* Boolean */
    561 {	char *endfn;
    562 	char *p;
    563 	/*
    564 	 * The breaks table contains pointers to the beginning and end
    565 	 * of each argument.
    566 	 */
    567 	char **breaks;
    568 	unsigned num_breaks = 2;	/* for testing */
    569 	char **btop;
    570 	char **bp;
    571 	char **ap;
    572 	char *vararg = 0;
    573 
    574 	/* Pre-ANSI implementations don't agree on whether strchr */
    575 	/* is called strchr or index, so we open-code it here. */
    576 	for ( endfn = buf; *(endfn++) != '('; )
    577 	  ;
    578 top:	p = endfn;
    579 	breaks = (char **)malloc(sizeof(char *) * num_breaks * 2);
    580 	if ( breaks == NULL )
    581 	   {	/* Couldn't allocate break table, give up */
    582 		fprintf(stderr, "Unable to allocate break table!\n");
    583 		fputs(buf, out);
    584 		return -1;
    585 	   }
    586 	btop = breaks + num_breaks * 2 - 2;
    587 	bp = breaks;
    588 	/* Parse the argument list */
    589 	do
    590 	   {	int level = 0;
    591 		char *lp = NULL;
    592 		char *rp = NULL;
    593 		char *end = NULL;
    594 
    595 		if ( bp >= btop )
    596 		   {	/* Filled up break table. */
    597 			/* Allocate a bigger one and start over. */
    598 			free((char *)breaks);
    599 			num_breaks <<= 1;
    600 			goto top;
    601 		   }
    602 		*bp++ = p;
    603 		/* Find the end of the argument */
    604 		for ( ; end == NULL; p++ )
    605 		   {	switch(*p)
    606 			   {
    607 			   case ',':
    608 				if ( !level ) end = p;
    609 				break;
    610 			   case '(':
    611 				if ( !level ) lp = p;
    612 				level++;
    613 				break;
    614 			   case ')':
    615 				if ( --level < 0 ) end = p;
    616 				else rp = p;
    617 				break;
    618 			   case '/':
    619 				if (p[1] == '*')
    620 				    p = skipspace(p, 1) - 1;
    621 				break;
    622 			   case '"':
    623 			       p = scanstring(p, 1) - 1;
    624 			       break;
    625 			   default:
    626 				;
    627 			   }
    628 		   }
    629 		/* Erase any embedded prototype parameters. */
    630 		if ( lp && rp )
    631 		  writeblanks(lp + 1, rp);
    632 		p--;			/* back up over terminator */
    633 		/* Find the name being declared. */
    634 		/* This is complicated because of procedure and */
    635 		/* array modifiers. */
    636 		for ( ; ; )
    637 		   {	p = skipspace(p - 1, -1);
    638 			switch ( *p )
    639 			   {
    640 			   case ']':	/* skip array dimension(s) */
    641 			   case ')':	/* skip procedure args OR name */
    642 			   {	int level = 1;
    643 				while ( level )
    644 				 switch ( *--p )
    645 				   {
    646 				   case ']': case ')':
    647 				       level++;
    648 				       break;
    649 				   case '[': case '(':
    650 				       level--;
    651 				       break;
    652 				   case '/':
    653 				       if (p > buf && p[-1] == '*')
    654 					   p = skipspace(p, -1) + 1;
    655 				       break;
    656 				   case '"':
    657 				       p = scanstring(p, -1) + 1;
    658 				       break;
    659 				   default: ;
    660 				   }
    661 			   }
    662 				if ( *p == '(' && *skipspace(p + 1, 1) == '*' )
    663 				   {	/* We found the name being declared */
    664 					while ( !isidfirstchar(*p) )
    665 					  p = skipspace(p, 1) + 1;
    666 					goto found;
    667 				   }
    668 				break;
    669 			   default:
    670 				goto found;
    671 			   }
    672 		   }
    673 found:		if ( *p == '.' && p[-1] == '.' && p[-2] == '.' )
    674 		  {	if ( convert_varargs )
    675 			  {	*bp++ = "va_alist";
    676 				vararg = p-2;
    677 			  }
    678 			else
    679 			  {	p++;
    680 				if ( bp == breaks + 1 )	/* sole argument */
    681 				  writeblanks(breaks[0], p);
    682 				else
    683 				  writeblanks(bp[-1] - 1, p);
    684 				bp--;
    685 			  }
    686 		   }
    687 		else
    688 		   {	while ( isidchar(*p) ) p--;
    689 			*bp++ = p+1;
    690 		   }
    691 		p = end;
    692 	   }
    693 	while ( *p++ == ',' );
    694 	*bp = p;
    695 	/* Make a special check for 'void' arglist */
    696 	if ( bp == breaks+2 )
    697 	   {	p = skipspace(breaks[0], 1);
    698 		if ( !strncmp(p, "void", 4) )
    699 		   {	p = skipspace(p+4, 1);
    700 			if ( p == breaks[2] - 1 )
    701 			   {	bp = breaks;	/* yup, pretend arglist is empty */
    702 				writeblanks(breaks[0], p + 1);
    703 			   }
    704 		   }
    705 	   }
    706 	/* Put out the function name and left parenthesis. */
    707 	p = buf;
    708 	while ( p != endfn ) putc(*p, out), p++;
    709 	/* Put out the declaration. */
    710 	if ( header )
    711 	  {	fputs(");", out);
    712 		for ( p = breaks[0]; *p; p++ )
    713 		  if ( *p == '\r' || *p == '\n' )
    714 		    putc(*p, out);
    715 	  }
    716 	else
    717 	  {	for ( ap = breaks+1; ap < bp; ap += 2 )
    718 		  {	p = *ap;
    719 			while ( isidchar(*p) )
    720 			  putc(*p, out), p++;
    721 			if ( ap < bp - 1 )
    722 			  fputs(", ", out);
    723 		  }
    724 		fputs(")  ", out);
    725 		/* Put out the argument declarations */
    726 		for ( ap = breaks+2; ap <= bp; ap += 2 )
    727 		  (*ap)[-1] = ';';
    728 		if ( vararg != 0 )
    729 		  {	*vararg = 0;
    730 			fputs(breaks[0], out);		/* any prior args */
    731 			fputs("va_dcl", out);		/* the final arg */
    732 			fputs(bp[0], out);
    733 		  }
    734 		else
    735 		  fputs(breaks[0], out);
    736 	  }
    737 	free((char *)breaks);
    738 	return 0;
    739 }
    740