gcc/fix-header.c

   1 /* patch-header.c - Make C header file suitable for C++.
   2    Copyright (C) 1993 Free Software Foundation, Inc.
   3
   4 This program is free software; you can redistribute it and/or modify it
   5 under the terms of the GNU General Public License as published by the
   6 Free Software Foundation; either version 2, or (at your option) any
   7 later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 /* This program massages a system include file (such as stdio.h),
  19    into a form more conformant with ANSI/POSIX, and more suitable for C++:
  20
  21    * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
  22    if they seem to be needed.  These prevent C++ compilers from name
  23    mangling the functions inside the braces.
  24
  25    * If an old-style incomplete function declaration is seen (without
  26    an argument list), and it is a "standard" function listed in
  27    the file sys-protos.h (and with a non-empty argument list), then
  28    the declaration is converted to a complete prototype by replacing
  29    the empty parameter list with the argument lust from sys-protos.h.
  30
  31    * The program can be given a list of (names of) required standard
  32    functions (such as fclose for stdio.h).  If a reqquired function
  33    is not seen in the input, then a prototype for it will be
  34    written to the output.
  35
  36    * If all of the non-comment code of the original file is protected
  37    against multiple inclusion:
  38         #ifndef FOO
  39         #define FOO
  40         <body of include file>
  41         #endif
  42    then extra matter added to the include file is placed inside the <body>.
  43
  44    * If the input file is OK (nothing needs to be done);
  45    the output file is not written (nor removed if it exists).
  46
  47    There are also some special actions that are done for certain
  48    well-known standard include files:
  49
  50    * If argv[1] is "sys/stat.h", the Posix.1 macros
  51    S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
  52    they were missing, and the corresponding "traditional" S_IFxxx
  53    macros were defined.
  54
  55    * If argv[1] is "errno.h", errno is declared if it was missing.
  56
  57    * TODO:  The input file should be read complete into memory, because:
  58    a) it needs to be scanned twice anyway, and
  59    b) it would be nice to allow update in place.
  60
  61    Usage:
  62         patch-header FOO.H INFILE.H OUTFILE.H REQUIRED_FUNCS <SCAN-FILE
  63    where:
  64    * FOO.H is the relative file name of the include file,
  65    as it would be #include'd by a C file.  (E.g. stdio.h)
  66    * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
  67    * OUTFILE.H is the full pathname for where to write the output file,
  68    if anything needs to be done.  (e.g. ./include/stdio.h)
  69    * SCAN-FILE is the output of the scan-decls program.
  70    * REQUIRED_FUNCS is a list of required function (e.g. fclose for stdio.h).
  71
  72    Written by Per Bothner <bothner@cygnus.com>, July 1993. */
  73
  74 #include <stdio.h>
  75 #include <ctype.h>
  76 #include <sys/types.h>
  77 #include <sys/stat.h>
  78 #ifndef O_RDONLY
  79 #define O_RDONLY 0
  80 #endif
  81 #include "obstack.h"
  82 #include "scan.h"
  83
  84 extern char *strcpy();
  85 sstring buf;
  86 int verbose = 0;
  87 int partial_count = 0;
  88 int missing_extern_C_count = 0;
  89 int missing_extra_stuff = 0;
  90
  91 #include "xsys-protos.h"
  92
  93 char *inf_buffer;
  94 char *inf_limit;
  95 char *inf_ptr;
  96 long int inf_size;
  97
  98 /* Certain standard files get extra treatment */
  99
 100 enum special_file
 101 {
 102   no_special,
 103   errno_special,
 104   sys_stat_special
 105 };
 106
 107 enum special_file special_file_handling = no_special;
 108
 109 /* The following are only used when handling sys/stat.h */
 110 /* They are set if the corresponding macro has been seen. */
 111 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 112 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 113 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 114 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 115 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 116 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 117
 118 /* The following are only used when handling errno.h */
 119 int seen_errno = 0;
 120
 121 /* Wrapper around free, to avoid prototype clashes. */
 122
 123 void xfree (ptr)
 124      char *ptr;
 125 {
 126   free(ptr);
 127 }
 128
 129 #define obstack_chunk_alloc xmalloc
 130 #define obstack_chunk_free xfree
 131 struct obstack scan_file_obstack;
 132
 133 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 134 struct fn_decl *
 135 lookup_std_proto (name)
 136      char *name;
 137 {
 138   int i = hash(name) % HASH_SIZE;
 139   int i0 = i;
 140   for (;;)
 141     {
 142       struct fn_decl *fn;
 143       if (hash_tab[i] == 0)
 144         return NULL;
 145       fn = &std_protos[hash_tab[i]];
 146       if (strcmp (fn->fname, name) == 0)
 147         return fn;
 148       i = (i+1) % HASH_SIZE;
 149       if (i == i0)
 150         abort();
 151     }
 152 }
 153
 154 char *inc_filename;
 155 int inc_filename_length;
 156 char *progname = "patch-header";
 157 FILE *outf;
 158 sstring buf;
 159 sstring line;
 160
 161 int lbrac_line, rbrac_line;
 162
 163 char **required_functions;
 164 int required_unseen_count;
 165
 166 int
 167 write_lbrac ()
 168 {
 169   fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 170
 171   if (partial_count)
 172     {
 173       fprintf (outf, "#ifndef _PARAMS\n");
 174       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 175       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 176       fprintf (outf, "#else\n");
 177       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 178       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 179     }
 180 }
 181
 182 struct partial_proto
 183 {
 184   struct partial_proto *next;
 185   char *fname;  /* name of function */
 186   char *rtype;  /* return type */
 187   struct fn_decl *fn;
 188   int line_seen;
 189 };
 190
 191 struct partial_proto *partial_proto_list = NULL;
 192
 193 struct partial_proto required_dummy_proto;
 194 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 195 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 196 #define CLEAR_REQUIRED(FN) ((FN)->partial = 0)
 197
 198 void
 199 recognized_macro (fname)
 200      char *fname;
 201 {
 202   /* The original include file defines fname as a macro. */
 203   struct fn_decl *fn = lookup_std_proto (fname);
 204
 205   /* Since fname is a macro, don't require a prototype for it. */
 206   if (fn && REQUIRED (fn))
 207     {
 208       CLEAR_REQUIRED(fn);
 209       required_unseen_count--;
 210     }
 211
 212   switch (special_file_handling)
 213     {
 214     case errno_special:
 215       if (strcmp (fname, "errno") == 0) seen_errno++;
 216       break;
 217     case sys_stat_special:
 218       if (fname[0] == 'S' && fname[1] == '_')
 219         {
 220           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 221           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 222           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 223           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 224           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 225           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 226           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 227           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 228           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 229           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 230           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 231           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 232         }
 233     }
 234 }
 235
 236 void
 237 recognized_extern (name, type)
 238      char *name;
 239      char *type;
 240 {
 241   switch (special_file_handling)
 242     {
 243     case errno_special:
 244       if (strcmp (name, "errno") == 0) seen_errno++;
 245       break;
 246     }
 247 }
 248
 249 /* Called by scan_decls if it saw a function definition for a function
 250    named FNAME, with return type RTYPE, and argument list ARGS,
 251    in source file FILE_SEEN on line LINE_SEEN.
 252    KIND is 'I' for an inline function;
 253    'F' if a normal function declaration preceded by 'extern "C"'
 254    (or nested inside 'extern "C"' braces); or
 255    'f' for other function declarations. */
 256
 257 void
 258 recognized_function (fname, kind, rtype, args, file_seen, line_seen)
 259      char *fname;
 260      int kind; /* One of 'f' 'F' or 'I' */
 261      char *rtype;
 262      char *args;
 263      char *file_seen;
 264      int line_seen;
 265 {
 266   struct partial_proto *partial;
 267   int i;
 268   struct fn_decl *fn;
 269   if (kind == 'f')
 270     missing_extern_C_count++;
 271
 272   fn = lookup_std_proto (fname);
 273
 274   /* Remove the function from the list of required function. */
 275   if (fn && REQUIRED (fn))
 276     {
 277       CLEAR_REQUIRED(fn);
 278       required_unseen_count--;
 279     }
 280
 281   /* If we have a full prototype, we're done. */
 282   if (args[0] != '\0')
 283     return;
 284
 285   if (kind == 'I')  /* don't edit inline function */
 286     return;
 287
 288   /* If the partial prototype was included from some other file,
 289      we don't need to patch it up (in this run). */
 290   i = strlen (file_seen);
 291   if (i < inc_filename_length
 292       || strcmp (inc_filename, file_seen + (i - inc_filename_length)) != 0)
 293     return;
 294
 295   if (fn == NULL)
 296     return;
 297   if (fn->params[0] == '\0' || strcmp(fn->params, "void") == 0)
 298     return;
 299
 300   /* We only have a partial function declaration,
 301      so remember that we have to add a complete prototype. */
 302   partial_count++;
 303   partial = (struct partial_proto*)
 304     obstack_alloc (&scan_file_obstack, sizeof(struct partial_proto));
 305   partial->fname = obstack_alloc (&scan_file_obstack, strlen(fname) + 1);
 306   strcpy (partial->fname, fname);
 307   partial->rtype = obstack_alloc (&scan_file_obstack, strlen(rtype) + 1);
 308   strcpy (partial->rtype, rtype);
 309   partial->line_seen = line_seen;
 310   partial->fn = fn;
 311   fn->partial = partial;
 312   partial->next = partial_proto_list;
 313   partial_proto_list = partial;
 314   if (verbose)
 315     {
 316       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 317                inc_filename, fname);
 318     }
 319 }
 320
 321 void
 322 read_scan_file (scan_file)
 323      FILE *scan_file;
 324 {
 325   char **rptr;
 326   obstack_init(&scan_file_obstack);
 327
 328   scan_decls (scan_file);
 329
 330   if (missing_extern_C_count + required_unseen_count + partial_count
 331       + missing_extra_stuff == 0)
 332     {
 333       if (verbose)
 334         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 335       exit (0);
 336     }
 337   if (!verbose)
 338     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 339   else
 340     {
 341       if (required_unseen_count)
 342         fprintf (stderr, "%s: %d missing function declarations.\n",
 343                  inc_filename, required_unseen_count);
 344       if (partial_count)
 345         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 346                  inc_filename, partial_count);
 347       if (missing_extern_C_count)
 348         fprintf (stderr,
 349                  "%s: %d declarations not protected by extern \"C\".\n",
 350                  inc_filename, missing_extern_C_count);
 351     }
 352 }
 353
 354 write_rbrac ()
 355 {
 356   struct fn_decl *fn;
 357   char **rptr;
 358   register struct partial_proto *partial;
 359
 360   if (required_unseen_count)
 361     fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 362
 363   /* Now we print out prototypes for those functions that we haven't seen. */
 364   for (rptr = required_functions; *rptr; rptr++)
 365     {
 366       fn = lookup_std_proto (*rptr);
 367       if (fn == NULL || !REQUIRED (fn))
 368         continue;
 369       fprintf (outf, "extern %s %s (%s);\n",
 370                fn->rtype, fn->fname, fn->params);
 371     }
 372   if (required_unseen_count)
 373     fprintf (outf,
 374              "#endif /* defined(__STDC__) || defined(__cplusplus) */\n");
 375
 376   switch (special_file_handling)
 377     {
 378     case errno_special:
 379       if (!seen_errno)
 380         fprintf (outf, "extern int errno;\n");
 381       break;
 382     case sys_stat_special:
 383       if (!seen_S_ISBLK && seen_S_IFBLK)
 384         fprintf (outf,
 385                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 386       if (!seen_S_ISCHR && seen_S_IFCHR)
 387         fprintf (outf,
 388                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 389       if (!seen_S_ISDIR && seen_S_IFDIR)
 390         fprintf (outf,
 391                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 392       if (!seen_S_ISFIFO && seen_S_IFIFO)
 393         fprintf (outf,
 394                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 395       if (!seen_S_ISLNK && seen_S_IFLNK)
 396         fprintf (outf,
 397                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 398       if (!seen_S_ISREG && seen_S_IFREG)
 399         fprintf (outf,
 400                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 401       break;
 402     }
 403
 404
 405   fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 406 }
 407
 408 char *
 409 strdup (str)
 410      char *str;
 411 {
 412   return strcpy((char*)malloc (strlen (str) + 1), str);
 413 }
 414
 415 /* Returns 1 iff the file is properly protected from multiple inclusion:
 416    #ifndef PROTECT_NAME
 417    #define PROTECT_NAME
 418    #endif
 419
 420  */
 421
 422 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char*)inf_ptr++ : EOF)
 423 #define INF_UNGET() inf_ptr--
 424
 425 int
 426 inf_skip_spaces (c)
 427      int c;
 428 {
 429   for (;;)
 430     {
 431       if (c == ' ' || c == '\t')
 432         c = INF_GET();
 433       else if (c == '/')
 434         {
 435           c = INF_GET();
 436           if (c != '*')
 437             {
 438               INF_UNGET();
 439               return '/';
 440             }
 441           c = INF_GET();
 442           for (;;)
 443             {
 444               if (c == EOF)
 445                 return EOF;
 446               else if (c != '*')
 447                 {
 448                   if (c == '\n')
 449                     source_lineno++, lineno++;
 450                   c = INF_GET ();
 451                 }
 452               else if ((c = INF_GET()) == '/')
 453                 return INF_GET();
 454             }
 455         }
 456       else
 457         break;
 458     }
 459   return c;
 460 }
 461
 462 /* Read into STR from inf_buffer upto DELIM. */
 463
 464 int
 465 inf_read_upto (str, delim)
 466      sstring *str;
 467      int delim;
 468 {
 469   int ch;
 470   for (;;)
 471     {
 472       ch = INF_GET ();
 473       if (ch == EOF || ch == delim)
 474         break;
 475       SSTRING_PUT(str, ch);
 476     }
 477   MAKE_SSTRING_SPACE(str, 1);
 478   *str->ptr = 0;
 479   return ch;
 480 }
 481
 482 int
 483 inf_scan_ident (s, c)
 484      register sstring *s;
 485      int c;
 486 {
 487   s->ptr = s->base;
 488   if (isalpha(c) || c == '_')
 489     {
 490       for (;;)
 491         {
 492           SSTRING_PUT(s, c);
 493           c = INF_GET ();
 494           if (c == EOF || !(isalnum(c) || c == '_'))
 495             break;
 496         }
 497     }
 498   MAKE_SSTRING_SPACE(s, 1);
 499   *s->ptr = 0;
 500   return c;
 501 }
 502
 503 /* Returns 1 if the file is correctly protected against multiple
 504    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 505    and setting *endif_line to the final #endif.
 506    Otherwise return 0. */
 507
 508 int
 509 check_protection (ifndef_line, endif_line)
 510      int *ifndef_line, *endif_line;
 511 {
 512   int c;
 513   int if_nesting = 1; /* Level of nesting of #if's */
 514   char *protect_name = NULL; /* Identifier following initial #ifndef */
 515   int define_seen = 0;
 516
 517   /* Skip initial white space (including comments). */
 518   for (;; lineno++)
 519     {
 520       c = inf_skip_spaces (' ');
 521       if (c == EOF)
 522         return 0;
 523       if (c != '\n')
 524         break;
 525     }
 526   if (c != '#')
 527     return 0;
 528   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 529   if (SSTRING_LENGTH(&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 530     return 0;
 531
 532   /* So far so good: We've seen an initial #ifndef. */
 533   *ifndef_line = lineno;
 534   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 535   if (SSTRING_LENGTH(&buf) == 0 || c == EOF)
 536     return 0;
 537   protect_name = strdup (buf.base);
 538
 539   INF_UNGET();
 540   c = inf_read_upto (&buf, '\n');
 541   if (c == EOF)
 542     return 0;
 543   lineno++;
 544
 545   for (;;)
 546     {
 547       c = inf_skip_spaces(' ');
 548       if (c == EOF)
 549         return 0;
 550       if (c == '\n')
 551         {
 552           lineno++;
 553           continue;
 554         }
 555       if (c != '#')
 556         goto skip_to_eol;
 557       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 558       if (SSTRING_LENGTH(&buf) == 0)
 559         ;
 560       else if (!strcmp (buf.base, "ifndef")
 561           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
 562         {
 563           if_nesting++;
 564         }
 565       else if (!strcmp (buf.base, "endif"))
 566         {
 567           if_nesting--;
 568           if (if_nesting == 0)
 569             break;
 570         }
 571       else if (!strcmp (buf.base, "else"))
 572         {
 573           if (if_nesting == 1)
 574             return 0;
 575         }
 576       else if (!strcmp (buf.base, "define"))
 577         {
 578           if (if_nesting != 1)
 579             goto skip_to_eol;
 580           c = inf_skip_spaces (c);
 581           c = inf_scan_ident (&buf, c);
 582           if (buf.base[0] > 0 && strcmp(buf.base, protect_name) == 0)
 583             define_seen = 1;
 584         }
 585     skip_to_eol:
 586       for (;;)
 587         {
 588           if (c == '\n' || c == EOF)
 589             break;
 590           c = INF_GET();
 591         }
 592       if (c == EOF)
 593         return 0;
 594       lineno++;
 595     }
 596
 597   if (!define_seen)
 598      return 0;
 599   *endif_line = lineno;
 600   /* Skip final white space (including comments). */
 601   for (;;)
 602     {
 603       c = inf_skip_spaces (' ');
 604       if (c == EOF)
 605         break;
 606       if (c != '\n')
 607         return 0;
 608     }
 609
 610   return 1;
 611 }
 612
 613 int
 614 main(argc, argv)
 615      int argc;
 616      char **argv;
 617 {
 618   int inf_fd;
 619   struct stat sbuf;
 620   int c;
 621   int i, done;
 622   char *cptr, *cptr0, **pptr;
 623   int ifndef_line;
 624   int endif_line;
 625   long to_read;
 626
 627
 628   if (argv[0] && argv[0][0])
 629     progname = argv[0];
 630
 631   if (argc < 4)
 632     {
 633       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h req_funcs <scan-file-name\n",
 634                progname);
 635       exit (-1);
 636     }
 637
 638   inc_filename = argv[1];
 639   inc_filename_length = strlen (inc_filename);
 640   if (strcmp (inc_filename, "sys/stat.h") == 0)
 641     special_file_handling = sys_stat_special;
 642   else if (strcmp (inc_filename, "errno.h") == 0)
 643     special_file_handling = errno_special, missing_extra_stuff++;
 644
 645   /* Calculate an upper bound of the number of function names in argv[4] */
 646   for (i = 1, cptr = argv[4]; *cptr; cptr++)
 647     if (*cptr == ' ') i++;
 648   /* Find the list of prototypes required for this include file. */
 649   required_functions = (char**)xmalloc((i+1) * sizeof(char*));
 650   for (cptr = argv[4], cptr0 = cptr, pptr = required_functions, done = 0;
 651        !done; cptr++)
 652     {
 653       done = *cptr == '\0';
 654       if (*cptr == ' ' || done)
 655         {
 656           *cptr = '\0';
 657           if (cptr > cptr0)
 658             {
 659               struct fn_decl *fn = lookup_std_proto(cptr0);
 660               *pptr++ = cptr0;
 661               if (fn == NULL)
 662                 fprintf (stderr, "Internal error:  No prototype for %s\n",
 663                          cptr0);
 664               else
 665                 SET_REQUIRED(fn);
 666             }
 667           cptr0 = cptr + 1;
 668         }
 669     }
 670   required_unseen_count = pptr - required_functions;
 671   *pptr = 0;
 672
 673   read_scan_file (stdin);
 674
 675   inf_fd = open (argv[2], O_RDONLY, 0666);
 676   if (inf_fd < 0)
 677     {
 678       fprintf (stderr, "%s: Cannot open '%s' for reading -",
 679                progname, argv[2]);
 680       perror (NULL);
 681       exit (-1);
 682     }
 683   if (fstat (inf_fd, &sbuf) < 0)
 684     {
 685       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
 686       perror (NULL);
 687       exit (-1);
 688     }
 689   inf_size = sbuf.st_size;
 690   inf_buffer = (char*) xmalloc (inf_size + 2);
 691   inf_buffer[inf_size] = '\n';
 692   inf_buffer[inf_size + 1] = '\0';
 693   inf_limit = inf_buffer + inf_size;
 694   inf_ptr = inf_buffer;
 695
 696   to_read = inf_size;
 697   while (to_read > 0)
 698     {
 699       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
 700       if (i < 0)
 701         {
 702           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
 703           perror (NULL);
 704           exit (-1);
 705         }
 706       if (i == 0)
 707         {
 708           inf_size -= to_read;
 709           break;
 710         }
 711       to_read -= i;
 712     }
 713
 714   close (inf_fd);
 715
 716   outf = fopen (argv[3], "w");
 717   if (outf == NULL)
 718     {
 719       fprintf (stderr, "%s: Cannot open '%s' for writing -",
 720                progname, argv[3]);
 721       perror (NULL);
 722       exit (-1);
 723     }
 724
 725   lineno = 1;
 726
 727   if (check_protection (&ifndef_line, &endif_line))
 728     {
 729 #if 0
 730       fprintf(stderr, "#ifndef %s on line %d; #endif on line %d\n",
 731              protect_name, ifndef_line, endif_line);
 732 #endif
 733       lbrac_line = ifndef_line+1;
 734       rbrac_line = endif_line;
 735     }
 736   else
 737     {
 738       lbrac_line = 1;
 739       rbrac_line = -1;
 740     }
 741
 742   /* Reset input file. */
 743   inf_ptr = inf_buffer;
 744   lineno = 1;
 745
 746   for (;;)
 747     {
 748       if (lineno == lbrac_line)
 749         write_lbrac ();
 750       if (lineno == rbrac_line)
 751         write_rbrac ();
 752       for (;;)
 753         {
 754           struct fn_decl *fn;
 755           c = INF_GET();
 756           if (c == EOF)
 757             break;
 758           if (isalpha (c) || c == '_')
 759             {
 760               struct partial_proto *partial;
 761               c = inf_scan_ident (&buf, c);
 762               INF_UNGET();
 763               fputs (buf.base, outf);
 764               fn = lookup_std_proto (buf.base);
 765               /* We only want to edit the declaration matching the one
 766                  seen by scan-decls, as there can be multiple
 767                  declarations, selected by #ifdef __STDC__ or whatever. */
 768               if (fn && fn->partial && fn->partial->line_seen == lineno)
 769                 {
 770                   c = inf_skip_spaces (' ');
 771                   if (c == EOF)
 772                     break;
 773                   if (c == '(')
 774                     {
 775                       c = inf_skip_spaces (' ');
 776                       if (c == ')')
 777                         {
 778                           fprintf (outf, " _PARAMS((%s))", fn->params);
 779                         }
 780                       else
 781                         {
 782                           putc ('(', outf);
 783                           INF_UNGET();
 784                         }
 785                     }
 786                   else
 787                     fprintf (outf, " %c", c);
 788                 }
 789             }
 790           else
 791             {
 792               putc (c, outf);
 793               if (c == '\n')
 794                 break;
 795             }
 796         }
 797       if (c == EOF)
 798         break;
 799       lineno++;
 800     }
 801   if (rbrac_line < 0)
 802     write_rbrac ();
 803
 804   fclose (outf);
 805
 806   return 0;
 807 }