gcc/fix-header.c

   1 /* fix-header.c - Make C header file suitable for C++.
   2    Copyright (C) 1993, 94-97, 1998 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* This program massages a system include file (such as stdio.h),
  19    into a form that is compatible with GNU C and GNU 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 list 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 required 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         fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
  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    * OPTIONS are such as you would pass to cpp.
  70
  71    Written by Per Bothner <bothner@cygnus.com>, July 1993.  */
  72
  73 #include "hconfig.h"
  74 #include "system.h"
  75 #include "obstack.h"
  76 #include "scan.h"
  77 #include "cpplib.h"
  78 #include "cpphash.h"
  79
  80 static void v_fatal PROTO ((const char *, va_list)) ATTRIBUTE_NORETURN;
  81 void fatal PVPROTO ((const char *, ...)) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  82
  83 sstring buf;
  84
  85 int verbose = 0;
  86 int partial_count = 0;
  87 int warnings = 0;
  88
  89 /* We no longer need to add extern "C", because cpp implicitly
  90    forces the standard include files to be treated as C.  */
  91 /*#define ADD_MISSING_EXTERN_C 1 */
  92
  93 #if ADD_MISSING_EXTERN_C
  94 int missing_extern_C_count = 0;
  95 #endif
  96
  97 #include "xsys-protos.h"
  98
  99 #ifdef FIXPROTO_IGNORE_LIST
 100 /* This is a currently unused feature.  */
 101
 102 /* List of files and directories to ignore.
 103    A directory name (ending in '/') means ignore anything in that
 104    directory.  (It might be more efficient to do directory pruning
 105    earlier in fixproto, but this is simpler and easier to customize.) */
 106
 107 static char *files_to_ignore[] = {
 108   "X11/",
 109   FIXPROTO_IGNORE_LIST
 110   0
 111 };
 112 #endif
 113
 114 char *inf_buffer;
 115 char *inf_limit;
 116 char *inf_ptr;
 117
 118 /* Certain standard files get extra treatment */
 119
 120 enum special_file
 121 {
 122   no_special,
 123 #ifdef errno_h
 124 #undef errno_h
 125 #endif
 126   errno_h,
 127 #ifdef stdio_h
 128 #undef stdio_h
 129 #endif
 130   stdio_h,
 131 #ifdef stdlib_h
 132 #undef stdlib_h
 133 #endif
 134   stdlib_h,
 135 #ifdef sys_stat_h
 136 #undef sys_stat_h
 137 #endif
 138   sys_stat_h
 139 };
 140
 141 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 142    by an empty name (i.e. by "\0\0").  */
 143
 144 typedef const char *namelist;
 145
 146 /* The following macros provide the bits for symbol_flags.  */
 147 typedef int symbol_flags;
 148
 149 /* Used to mark names defined in the ANSI/ISO C standard.  */
 150 #define ANSI_SYMBOL 1
 151
 152 /* We no longer massage include files for POSIX or XOPEN symbols,
 153    as there are now several versions of the POSIX and XOPEN standards,
 154    and it would be a maintenance nightmare for us to track them all.
 155    Better to be compatible with the system include files.  */
 156 /*#define ADD_MISSING_POSIX 1 */
 157 /*#define ADD_MISSING_XOPEN 1 */
 158
 159 #if ADD_MISSING_POSIX
 160 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 161 #define POSIX1_SYMBOL 2
 162 #define POSIX2_SYMBOL 4
 163 #else
 164 #define POSIX1_SYMBOL 0
 165 #define POSIX2_SYMBOL 0
 166 #endif
 167
 168 #if ADD_MISSING_XOPEN
 169 /* Used to mark names defined in X/Open Portability Guide.  */
 170 #define XOPEN_SYMBOL 8
 171 /* Used to mark names defined in X/Open UNIX Extensions.  */
 172 #define XOPEN_EXTENDED_SYMBOL 16
 173 #else
 174 #define XOPEN_SYMBOL 0
 175 #define XOPEN_EXTENDED_SYMBOL 0
 176 #endif
 177
 178 /* Used to indicate names that are not functions */
 179 #define MACRO_SYMBOL 512
 180
 181 struct symbol_list {
 182   symbol_flags flags;
 183   namelist names;
 184 };
 185
 186 #define SYMBOL_TABLE_SIZE 10
 187 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 188 int cur_symbol_table_size;
 189
 190 void
 191 add_symbols (flags, names)
 192      symbol_flags flags;
 193      namelist names;
 194 {
 195   symbol_table[cur_symbol_table_size].flags = flags;
 196   symbol_table[cur_symbol_table_size].names = names;
 197   cur_symbol_table_size++;
 198   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 199     fatal ("too many calls to add_symbols");
 200   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 201 }
 202
 203 struct std_include_entry {
 204   const char *name;
 205   symbol_flags flags;
 206   namelist names;
 207 };
 208
 209 const char NONE[] = "";  /* The empty namelist.  */
 210
 211 /* Special name to indicate a continuation line in std_include_table.  */
 212 const char CONTINUED[] = "";
 213
 214 struct std_include_entry *include_entry;
 215
 216 struct std_include_entry std_include_table [] = {
 217   { "ctype.h", ANSI_SYMBOL,
 218       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 219 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 220
 221   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 222
 223   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 224
 225   /* ANSI_SYMBOL is wrong, but ...  */
 226   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 227 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 228 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 229 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 230 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 231
 232   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 233
 234   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 235   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 236
 237 /*{ "limit.h", ... provided by gcc }, */
 238
 239   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 240
 241   { "math.h", ANSI_SYMBOL,
 242       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 243 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 244 tan\0tanh\0" },
 245
 246   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 247
 248   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 249
 250   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 251   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 252
 253   /* Left out signal() - its prototype is too complex for us!
 254      Also left out "sigaction sigaddset sigdelset sigemptyset
 255      sigfillset sigismember sigpending sigprocmask sigsuspend"
 256      because these need sigset_t or struct sigaction.
 257      Most systems that provide them will also declare them.  */
 258   { "signal.h", ANSI_SYMBOL, "kill\0raise\0" },
 259
 260   { "stdio.h", ANSI_SYMBOL,
 261       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 262 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 263 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 264 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 265 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 266 tmpnam\0ungetc\0" },
 267   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 268   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 269 /* Should perhaps also handle NULL, EOF, ... ? */
 270
 271   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 272      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 273      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 274      Should perhaps also add NULL */
 275   { "stdlib.h", ANSI_SYMBOL,
 276       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 277 exit\0free\0getenv\0labs\0malloc\0putenv\0qsort\0rand\0realloc\0\
 278 srand\0strtod\0strtol\0strtoul\0system\0" },
 279   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 280
 281   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 282 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 283 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 284 strtok\0strxfrm\0" },
 285 /* Should perhaps also add NULL and size_t */
 286
 287   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 288       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 289
 290   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 291
 292   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 293      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 294      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 295   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 296
 297   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 298
 299   { "sys/stat.h", POSIX1_SYMBOL,
 300       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 301   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 302       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 303 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 304   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 305
 306 #if 0
 307 /* How do we handle fd_set? */
 308   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 309   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 310 #endif
 311
 312   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 313   /* "sys/types.h" add types (not in old g++-include) */
 314
 315   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 316
 317   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 318   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 319       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 320 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 321
 322   { "tar.h", POSIX1_SYMBOL, NONE },
 323
 324   { "termios.h", POSIX1_SYMBOL,
 325       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 326
 327   { "time.h", ANSI_SYMBOL,
 328       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0tzset\0" },
 329
 330   { "unistd.h", POSIX1_SYMBOL,
 331       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 332 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 333 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 334 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 335 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 336 ttyname\0unlink\0write\0" },
 337   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 338   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 339       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 340
 341   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 342
 343   { NULL, 0, NONE }
 344 };
 345
 346 enum special_file special_file_handling = no_special;
 347
 348 /* They are set if the corresponding macro has been seen.  */
 349 /* The following are only used when handling sys/stat.h */
 350 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 351 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 352 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 353 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 354 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 355 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 356 /* The following are only used when handling errno.h */
 357 int seen_errno = 0;
 358 /* The following are only used when handling stdlib.h */
 359 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 360 \f
 361 /* Wrapper around free, to avoid prototype clashes.  */
 362
 363 void
 364 xfree (ptr)
 365      char *ptr;
 366 {
 367   free (ptr);
 368 }
 369
 370 /* Avoid error if config defines abort as fancy_abort.
 371    It's not worth "really" implementing this because ordinary
 372    compiler users never run fix-header.  */
 373
 374 void
 375 fancy_abort ()
 376 {
 377   abort ();
 378 }
 379 \f
 380 #define obstack_chunk_alloc xmalloc
 381 #define obstack_chunk_free xfree
 382 struct obstack scan_file_obstack;
 383
 384 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 385
 386 struct fn_decl *
 387 lookup_std_proto (name, name_length)
 388      const char *name;
 389      int name_length;
 390 {
 391   int i = hashf (name, name_length, HASH_SIZE);
 392   int i0 = i;
 393   for (;;)
 394     {
 395       struct fn_decl *fn;
 396       if (hash_tab[i] == 0)
 397         return NULL;
 398       fn = &std_protos[hash_tab[i]];
 399       if ((int) strlen (fn->fname) == name_length
 400           && strncmp (fn->fname, name, name_length) == 0)
 401         return fn;
 402       i = (i+1) % HASH_SIZE;
 403       if (i == i0)
 404         abort ();
 405     }
 406 }
 407
 408 char *inc_filename;
 409 int inc_filename_length;
 410 char *progname = "fix-header";
 411 FILE *outf;
 412 sstring line;
 413
 414 int lbrac_line, rbrac_line;
 415
 416 int required_unseen_count = 0;
 417 int required_other = 0;
 418
 419 void
 420 write_lbrac ()
 421 {
 422
 423 #if ADD_MISSING_EXTERN_C
 424   if (missing_extern_C_count + required_unseen_count > 0)
 425     fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 426 #endif
 427
 428   if (partial_count)
 429     {
 430       fprintf (outf, "#ifndef _PARAMS\n");
 431       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 432       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 433       fprintf (outf, "#else\n");
 434       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 435       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 436     }
 437 }
 438
 439 struct partial_proto
 440 {
 441   struct partial_proto *next;
 442   char *fname;  /* name of function */
 443   char *rtype;  /* return type */
 444   struct fn_decl *fn;
 445   int line_seen;
 446 };
 447
 448 struct partial_proto *partial_proto_list = NULL;
 449
 450 struct partial_proto required_dummy_proto, seen_dummy_proto;
 451 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 452 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 453 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 454 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 455
 456 void
 457 recognized_macro (fname)
 458      char *fname;
 459 {
 460   /* The original include file defines fname as a macro.  */
 461   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 462
 463   /* Since fname is a macro, don't require a prototype for it.  */
 464   if (fn)
 465     {
 466       if (REQUIRED (fn))
 467         required_unseen_count--;
 468       SET_SEEN (fn);
 469     }
 470
 471   switch (special_file_handling)
 472     {
 473     case errno_h:
 474       if (strcmp (fname, "errno") == 0 && !seen_errno)
 475         seen_errno = 1, required_other--;
 476       break;
 477     case stdlib_h:
 478       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 479         seen_EXIT_FAILURE = 1, required_other--;
 480       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 481         seen_EXIT_SUCCESS = 1, required_other--;
 482       break;
 483     case sys_stat_h:
 484       if (fname[0] == 'S' && fname[1] == '_')
 485         {
 486           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 487           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 488           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 489           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 490           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 491           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 492           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 493           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 494           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 495           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 496           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 497           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 498         }
 499       break;
 500
 501     default:
 502       break;
 503     }
 504 }
 505
 506 void
 507 recognized_extern (name, name_length, type, type_length)
 508      char *name;
 509      char *type;
 510      int name_length, type_length;
 511 {
 512   switch (special_file_handling)
 513     {
 514     case errno_h:
 515       if (name_length == 5 && strncmp (name, "errno", 5) == 0 && !seen_errno)
 516         seen_errno = 1, required_other--;
 517       break;
 518
 519     default:
 520       break;
 521     }
 522 }
 523
 524 /* Called by scan_decls if it saw a function definition for a function
 525    named FNAME, with return type RTYPE, and argument list ARGS,
 526    in source file FILE_SEEN on line LINE_SEEN.
 527    KIND is 'I' for an inline function;
 528    'F' if a normal function declaration preceded by 'extern "C"'
 529    (or nested inside 'extern "C"' braces); or
 530    'f' for other function declarations.  */
 531
 532 void
 533 recognized_function (fname, fname_length,
 534                      kind, rtype, rtype_length,
 535                      have_arg_list, file_seen, line_seen)
 536      char *fname;
 537      int fname_length;
 538      int kind; /* One of 'f' 'F' or 'I' */
 539      char *rtype;
 540      int rtype_length;
 541      int have_arg_list;
 542      char *file_seen;
 543      int line_seen;
 544 {
 545   struct partial_proto *partial;
 546   int i;
 547   struct fn_decl *fn;
 548 #if ADD_MISSING_EXTERN_C
 549   if (kind == 'f')
 550     missing_extern_C_count++;
 551 #endif
 552
 553   fn = lookup_std_proto (fname, fname_length);
 554
 555   /* Remove the function from the list of required function.  */
 556   if (fn)
 557     {
 558       if (REQUIRED (fn))
 559         required_unseen_count--;
 560       SET_SEEN (fn);
 561     }
 562
 563   /* If we have a full prototype, we're done.  */
 564   if (have_arg_list)
 565     return;
 566
 567   if (kind == 'I')  /* don't edit inline function */
 568     return;
 569
 570   /* If the partial prototype was included from some other file,
 571      we don't need to patch it up (in this run).  */
 572   i = strlen (file_seen);
 573   if (i < inc_filename_length
 574       || strcmp (inc_filename, file_seen + (i - inc_filename_length)) != 0)
 575     return;
 576
 577   if (fn == NULL)
 578     return;
 579   if (fn->params[0] == '\0' || strcmp (fn->params, "void") == 0)
 580     return;
 581
 582   /* We only have a partial function declaration,
 583      so remember that we have to add a complete prototype.  */
 584   partial_count++;
 585   partial = (struct partial_proto *)
 586     obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 587   partial->fname = obstack_alloc (&scan_file_obstack, fname_length + 1);
 588   bcopy (fname, partial->fname, fname_length);
 589   partial->fname[fname_length] = 0;
 590   partial->rtype = obstack_alloc (&scan_file_obstack, rtype_length + 1);
 591   sprintf (partial->rtype, "%.*s", rtype_length, rtype);
 592   partial->line_seen = line_seen;
 593   partial->fn = fn;
 594   fn->partial = partial;
 595   partial->next = partial_proto_list;
 596   partial_proto_list = partial;
 597   if (verbose)
 598     {
 599       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 600                inc_filename, partial->fname);
 601     }
 602 }
 603
 604 /* For any name in NAMES that is defined as a macro,
 605    call recognized_macro on it.  */
 606
 607 void
 608 check_macro_names (pfile, names)
 609      cpp_reader *pfile;
 610      namelist names;
 611 {
 612   while (*names)
 613     {
 614       if (cpp_lookup (pfile, names, -1, -1))
 615         recognized_macro (names);
 616       names += strlen (names) + 1;
 617     }
 618 }
 619
 620 void
 621 read_scan_file (in_fname, argc, argv)
 622      char *in_fname;
 623      int argc;
 624      char **argv;
 625 {
 626   cpp_reader scan_in;
 627   cpp_options scan_options;
 628   struct fn_decl *fn;
 629   int i;
 630   register struct symbol_list *cur_symbols;
 631
 632   obstack_init (&scan_file_obstack);
 633
 634   cpp_reader_init (&scan_in);
 635   scan_in.opts = &scan_options;
 636   cpp_options_init (&scan_options);
 637   i = cpp_handle_options (&scan_in, argc, argv);
 638   if (i < argc && ! CPP_FATAL_ERRORS (&scan_in))
 639     cpp_fatal (&scan_in, "Invalid option `%s'", argv[i]);
 640   if (CPP_FATAL_ERRORS (&scan_in))
 641     exit (FATAL_EXIT_CODE);
 642
 643   if (! cpp_start_read (&scan_in, in_fname))
 644     exit (FATAL_EXIT_CODE);
 645   CPP_OPTIONS (&scan_in)->no_line_commands = 1;
 646
 647   scan_decls (&scan_in, argc, argv);
 648   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 649     check_macro_names (&scan_in, cur_symbols->names);
 650
 651   if (verbose && (scan_in.errors + warnings) > 0)
 652     fprintf (stderr, "(%s: %d errors and %d warnings from cpp)\n",
 653              inc_filename, scan_in.errors, warnings);
 654   if (scan_in.errors)
 655     exit (SUCCESS_EXIT_CODE);
 656
 657   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 658      If so, those functions are also required.  */
 659   if (special_file_handling == stdio_h
 660       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 661     {
 662       static char getchar_call[] = "getchar();";
 663       cpp_buffer *buf
 664         = cpp_push_buffer (&scan_in, getchar_call, sizeof(getchar_call) - 1);
 665       int old_written = CPP_WRITTEN (&scan_in);
 666       int seen_filbuf = 0;
 667
 668       /* Scan the macro expansion of "getchar();".  */
 669       for (;;)
 670         {
 671           enum cpp_token token = cpp_get_token (&scan_in);
 672           int length = CPP_WRITTEN (&scan_in) - old_written;
 673           CPP_SET_WRITTEN (&scan_in, old_written);
 674           if (token == CPP_EOF) /* Should not happen ...  */
 675             break;
 676           if (token == CPP_POP && CPP_BUFFER (&scan_in) == buf)
 677             {
 678               cpp_pop_buffer (&scan_in);
 679               break;
 680             }
 681           if (token == CPP_NAME && length == 7
 682               && strcmp ("_filbuf", scan_in.token_buffer + old_written) == 0)
 683             seen_filbuf++;
 684         }
 685       if (seen_filbuf)
 686         {
 687           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 688           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 689           int need_flsbuf
 690             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 691
 692           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 693           if (need_filbuf + need_flsbuf)
 694             {
 695               char *new_list;
 696               if (need_filbuf)
 697                 SET_REQUIRED (fn);
 698               if (need_flsbuf)
 699                 SET_REQUIRED (flsbuf_fn);
 700               if (need_flsbuf + need_filbuf == 2)
 701                 new_list = "_filbuf\0_flsbuf\0";
 702               else if (need_flsbuf)
 703                 new_list = "_flsbuf\0";
 704               else /* if (need_flsbuf) */
 705                 new_list = "_filbuf\0";
 706               add_symbols (ANSI_SYMBOL, new_list);
 707               required_unseen_count += need_filbuf + need_flsbuf;
 708             }
 709         }
 710     }
 711
 712   if (required_unseen_count + partial_count + required_other
 713 #if ADD_MISSING_EXTERN_C
 714       + missing_extern_C_count
 715 #endif
 716       == 0)
 717     {
 718       if (verbose)
 719         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 720       exit (SUCCESS_EXIT_CODE);
 721     }
 722   if (!verbose)
 723     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 724   else
 725     {
 726       if (required_unseen_count)
 727         fprintf (stderr, "%s: %d missing function declarations.\n",
 728                  inc_filename, required_unseen_count);
 729       if (partial_count)
 730         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 731                  inc_filename, partial_count);
 732 #if ADD_MISSING_EXTERN_C
 733       if (missing_extern_C_count)
 734         fprintf (stderr,
 735                  "%s: %d declarations not protected by extern \"C\".\n",
 736                  inc_filename, missing_extern_C_count);
 737 #endif
 738     }
 739 }
 740
 741 void
 742 write_rbrac ()
 743 {
 744   struct fn_decl *fn;
 745   const char *cptr;
 746   register struct symbol_list *cur_symbols;
 747
 748   if (required_unseen_count)
 749     {
 750 #ifdef NO_IMPLICIT_EXTERN_C
 751       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 752 #endif
 753     }
 754
 755   /* Now we print out prototypes for those functions that we haven't seen.  */
 756   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 757     {
 758       int if_was_emitted = 0;
 759       int name_len;
 760       cptr = cur_symbols->names;
 761       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 762         {
 763           int macro_protect = 0;
 764
 765           if (cur_symbols->flags & MACRO_SYMBOL)
 766             continue;
 767
 768           fn = lookup_std_proto (cptr, name_len);
 769           if (fn == NULL || !REQUIRED (fn))
 770             continue;
 771
 772           if (!if_was_emitted)
 773             {
 774 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 775               if (cur_symbols->flags & ANSI_SYMBOL)
 776                 fprintf (outf,
 777          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 778               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 779                 fprintf (outf,
 780        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 781     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 782     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 783               else if (cur_symbols->flags & XOPEN_SYMBOL)
 784                 {
 785                 fprintf (outf,
 786        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 787    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 788                 }
 789               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 790                 {
 791                 fprintf (outf,
 792        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 793    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 794                 }
 795               else
 796                 {
 797                   fatal ("internal error for function %s", fn->fname);
 798                 }
 799               if_was_emitted = 1;
 800             }
 801
 802           /* In the case of memmove, protect in case the application
 803              defines it as a macro before including the header.  */
 804           if (!strcmp (fn->fname, "memmove")
 805               || !strcmp (fn->fname, "vprintf")
 806               || !strcmp (fn->fname, "vfprintf")
 807               || !strcmp (fn->fname, "vsprintf")
 808               || !strcmp (fn->fname, "rewinddir")
 809               || !strcmp (fn->fname, "abort"))
 810             macro_protect = 1;
 811
 812           if (macro_protect)
 813             fprintf (outf, "#ifndef %s\n", fn->fname);
 814           fprintf (outf, "extern %s %s (%s);\n",
 815                    fn->rtype, fn->fname, fn->params);
 816           if (macro_protect)
 817             fprintf (outf, "#endif\n");
 818         }
 819       if (if_was_emitted)
 820         fprintf (outf,
 821                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 822     }
 823   if (required_unseen_count)
 824     {
 825 #ifdef NO_IMPLICIT_EXTERN_C
 826       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 827 #endif
 828     }
 829
 830   switch (special_file_handling)
 831     {
 832     case errno_h:
 833       if (!seen_errno)
 834         fprintf (outf, "extern int errno;\n");
 835       break;
 836     case stdlib_h:
 837       if (!seen_EXIT_FAILURE)
 838         fprintf (outf, "#define EXIT_FAILURE 1\n");
 839       if (!seen_EXIT_SUCCESS)
 840         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 841       break;
 842     case sys_stat_h:
 843       if (!seen_S_ISBLK && seen_S_IFBLK)
 844         fprintf (outf,
 845                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 846       if (!seen_S_ISCHR && seen_S_IFCHR)
 847         fprintf (outf,
 848                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 849       if (!seen_S_ISDIR && seen_S_IFDIR)
 850         fprintf (outf,
 851                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 852       if (!seen_S_ISFIFO && seen_S_IFIFO)
 853         fprintf (outf,
 854                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 855       if (!seen_S_ISLNK && seen_S_IFLNK)
 856         fprintf (outf,
 857                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 858       if (!seen_S_ISREG && seen_S_IFREG)
 859         fprintf (outf,
 860                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 861       break;
 862
 863     default:
 864       break;
 865     }
 866
 867
 868 #if ADD_MISSING_EXTERN_C
 869   if (missing_extern_C_count + required_unseen_count > 0)
 870     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 871 #endif
 872 }
 873
 874 /* Returns 1 iff the file is properly protected from multiple inclusion:
 875    #ifndef PROTECT_NAME
 876    #define PROTECT_NAME
 877    #endif
 878
 879  */
 880
 881 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 882 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 883
 884 int
 885 inf_skip_spaces (c)
 886      int c;
 887 {
 888   for (;;)
 889     {
 890       if (c == ' ' || c == '\t')
 891         c = INF_GET ();
 892       else if (c == '/')
 893         {
 894           c = INF_GET ();
 895           if (c != '*')
 896             {
 897               (void) INF_UNGET (c);
 898               return '/';
 899             }
 900           c = INF_GET ();
 901           for (;;)
 902             {
 903               if (c == EOF)
 904                 return EOF;
 905               else if (c != '*')
 906                 {
 907                   if (c == '\n')
 908                     source_lineno++, lineno++;
 909                   c = INF_GET ();
 910                 }
 911               else if ((c = INF_GET ()) == '/')
 912                 return INF_GET ();
 913             }
 914         }
 915       else
 916         break;
 917     }
 918   return c;
 919 }
 920
 921 /* Read into STR from inf_buffer upto DELIM.  */
 922
 923 int
 924 inf_read_upto (str, delim)
 925      sstring *str;
 926      int delim;
 927 {
 928   int ch;
 929   for (;;)
 930     {
 931       ch = INF_GET ();
 932       if (ch == EOF || ch == delim)
 933         break;
 934       SSTRING_PUT (str, ch);
 935     }
 936   MAKE_SSTRING_SPACE (str, 1);
 937   *str->ptr = 0;
 938   return ch;
 939 }
 940
 941 int
 942 inf_scan_ident (s, c)
 943      register sstring *s;
 944      int c;
 945 {
 946   s->ptr = s->base;
 947   if (ISALPHA (c) || c == '_')
 948     {
 949       for (;;)
 950         {
 951           SSTRING_PUT (s, c);
 952           c = INF_GET ();
 953           if (c == EOF || !(ISALNUM (c) || c == '_'))
 954             break;
 955         }
 956     }
 957   MAKE_SSTRING_SPACE (s, 1);
 958   *s->ptr = 0;
 959   return c;
 960 }
 961
 962 /* Returns 1 if the file is correctly protected against multiple
 963    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 964    and setting *endif_line to the final #endif.
 965    Otherwise return 0.  */
 966
 967 int
 968 check_protection (ifndef_line, endif_line)
 969      int *ifndef_line, *endif_line;
 970 {
 971   int c;
 972   int if_nesting = 1; /* Level of nesting of #if's */
 973   char *protect_name = NULL; /* Identifier following initial #ifndef */
 974   int define_seen = 0;
 975
 976   /* Skip initial white space (including comments).  */
 977   for (;; lineno++)
 978     {
 979       c = inf_skip_spaces (' ');
 980       if (c == EOF)
 981         return 0;
 982       if (c != '\n')
 983         break;
 984     }
 985   if (c != '#')
 986     return 0;
 987   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 988   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 989     return 0;
 990
 991   /* So far so good: We've seen an initial #ifndef.  */
 992   *ifndef_line = lineno;
 993   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 994   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 995     return 0;
 996   protect_name = xstrdup (buf.base);
 997
 998   (void) INF_UNGET (c);
 999   c = inf_read_upto (&buf, '\n');
1000   if (c == EOF)
1001     return 0;
1002   lineno++;
1003
1004   for (;;)
1005     {
1006       c = inf_skip_spaces (' ');
1007       if (c == EOF)
1008         return 0;
1009       if (c == '\n')
1010         {
1011           lineno++;
1012           continue;
1013         }
1014       if (c != '#')
1015         goto skip_to_eol;
1016       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1017       if (SSTRING_LENGTH (&buf) == 0)
1018         ;
1019       else if (!strcmp (buf.base, "ifndef")
1020           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1021         {
1022           if_nesting++;
1023         }
1024       else if (!strcmp (buf.base, "endif"))
1025         {
1026           if_nesting--;
1027           if (if_nesting == 0)
1028             break;
1029         }
1030       else if (!strcmp (buf.base, "else"))
1031         {
1032           if (if_nesting == 1)
1033             return 0;
1034         }
1035       else if (!strcmp (buf.base, "define"))
1036         {
1037           if (if_nesting != 1)
1038             goto skip_to_eol;
1039           c = inf_skip_spaces (c);
1040           c = inf_scan_ident (&buf, c);
1041           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1042             define_seen = 1;
1043         }
1044     skip_to_eol:
1045       for (;;)
1046         {
1047           if (c == '\n' || c == EOF)
1048             break;
1049           c = INF_GET ();
1050         }
1051       if (c == EOF)
1052         return 0;
1053       lineno++;
1054     }
1055
1056   if (!define_seen)
1057      return 0;
1058   *endif_line = lineno;
1059   /* Skip final white space (including comments).  */
1060   for (;;)
1061     {
1062       c = inf_skip_spaces (' ');
1063       if (c == EOF)
1064         break;
1065       if (c != '\n')
1066         return 0;
1067     }
1068
1069   return 1;
1070 }
1071
1072 int
1073 main (argc, argv)
1074      int argc;
1075      char **argv;
1076 {
1077   int inf_fd;
1078   struct stat sbuf;
1079   int c;
1080 #ifdef FIXPROTO_IGNORE_LIST
1081   int i;
1082 #endif
1083   const char *cptr;
1084   int ifndef_line;
1085   int endif_line;
1086   long to_read;
1087   long int inf_size;
1088   register struct symbol_list *cur_symbols;
1089
1090   if (argv[0] && argv[0][0])
1091     {
1092       register char *p;
1093
1094       progname = 0;
1095       for (p = argv[0]; *p; p++)
1096         if (*p == '/')
1097           progname = p;
1098       progname = progname ? progname+1 : argv[0];
1099     }
1100
1101   if (argc < 4)
1102     {
1103       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1104                progname);
1105       exit (FATAL_EXIT_CODE);
1106     }
1107
1108   inc_filename = argv[1];
1109   inc_filename_length = strlen (inc_filename);
1110
1111 #ifdef FIXPROTO_IGNORE_LIST
1112   for (i = 0; files_to_ignore[i] != NULL; i++)
1113     {
1114       char *ignore_name = files_to_ignore[i];
1115       int ignore_len = strlen (ignore_name);
1116       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1117         {
1118           if (ignore_name[ignore_len-1] == '/'
1119               || inc_filename[ignore_len] == '\0')
1120             {
1121               if (verbose)
1122                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1123               exit (SUCCESS_EXIT_CODE);
1124             }
1125         }
1126
1127     }
1128 #endif
1129
1130   if (strcmp (inc_filename, "sys/stat.h") == 0)
1131     special_file_handling = sys_stat_h;
1132   else if (strcmp (inc_filename, "errno.h") == 0)
1133     special_file_handling = errno_h, required_other++;
1134   else if (strcmp (inc_filename, "stdlib.h") == 0)
1135     special_file_handling = stdlib_h, required_other+=2;
1136   else if (strcmp (inc_filename, "stdio.h") == 0)
1137     special_file_handling = stdio_h;
1138   include_entry = std_include_table;
1139   while (include_entry->name != NULL
1140          && (include_entry->name == CONTINUED
1141              || strcmp (inc_filename, include_entry->name) != 0))
1142     include_entry++;
1143
1144   if (include_entry->name != NULL)
1145     {
1146       struct std_include_entry *entry;
1147       cur_symbol_table_size = 0;
1148       for (entry = include_entry; ;)
1149         {
1150           if (entry->flags)
1151             add_symbols (entry->flags, entry->names);
1152           entry++;
1153           if (entry->name != CONTINUED)
1154             break;
1155         }
1156     }
1157   else
1158     symbol_table[0].names = NULL;
1159
1160   /* Count and mark the prototypes required for this include file.  */
1161   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1162     {
1163       int name_len;
1164       if (cur_symbols->flags & MACRO_SYMBOL)
1165         continue;
1166       cptr = cur_symbols->names;
1167       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1168         {
1169           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1170           required_unseen_count++;
1171           if (fn == NULL)
1172             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1173           else
1174             SET_REQUIRED (fn);
1175         }
1176     }
1177
1178   read_scan_file (argv[2], argc - 4, argv + 4);
1179
1180   inf_fd = open (argv[2], O_RDONLY, 0666);
1181   if (inf_fd < 0)
1182     {
1183       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1184                progname, argv[2]);
1185       perror (NULL);
1186       exit (FATAL_EXIT_CODE);
1187     }
1188   if (fstat (inf_fd, &sbuf) < 0)
1189     {
1190       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1191       perror (NULL);
1192       exit (FATAL_EXIT_CODE);
1193     }
1194   inf_size = sbuf.st_size;
1195   inf_buffer = (char *) xmalloc (inf_size + 2);
1196   inf_buffer[inf_size] = '\n';
1197   inf_buffer[inf_size + 1] = '\0';
1198   inf_limit = inf_buffer + inf_size;
1199   inf_ptr = inf_buffer;
1200
1201   to_read = inf_size;
1202   while (to_read > 0)
1203     {
1204       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1205       if (i < 0)
1206         {
1207           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1208           perror (NULL);
1209           exit (FATAL_EXIT_CODE);
1210         }
1211       if (i == 0)
1212         {
1213           inf_size -= to_read;
1214           break;
1215         }
1216       to_read -= i;
1217     }
1218
1219   close (inf_fd);
1220
1221   /* If file doesn't end with '\n', add one.  */
1222   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1223     inf_limit++;
1224
1225   unlink (argv[3]);
1226   outf = fopen (argv[3], "w");
1227   if (outf == NULL)
1228     {
1229       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1230                progname, argv[3]);
1231       perror (NULL);
1232       exit (FATAL_EXIT_CODE);
1233     }
1234
1235   lineno = 1;
1236
1237   if (check_protection (&ifndef_line, &endif_line))
1238     {
1239       lbrac_line = ifndef_line+1;
1240       rbrac_line = endif_line;
1241     }
1242   else
1243     {
1244       lbrac_line = 1;
1245       rbrac_line = -1;
1246     }
1247
1248   /* Reset input file.  */
1249   inf_ptr = inf_buffer;
1250   lineno = 1;
1251
1252   for (;;)
1253     {
1254       if (lineno == lbrac_line)
1255         write_lbrac ();
1256       if (lineno == rbrac_line)
1257         write_rbrac ();
1258       for (;;)
1259         {
1260           struct fn_decl *fn;
1261           c = INF_GET ();
1262           if (c == EOF)
1263             break;
1264           if (ISALPHA (c) || c == '_')
1265             {
1266               c = inf_scan_ident (&buf, c);
1267               (void) INF_UNGET (c);
1268               fputs (buf.base, outf);
1269               fn = lookup_std_proto (buf.base, strlen (buf.base));
1270               /* We only want to edit the declaration matching the one
1271                  seen by scan-decls, as there can be multiple
1272                  declarations, selected by #ifdef __STDC__ or whatever.  */
1273               if (fn && fn->partial && fn->partial->line_seen == lineno)
1274                 {
1275                   c = inf_skip_spaces (' ');
1276                   if (c == EOF)
1277                     break;
1278                   if (c == '(')
1279                     {
1280                       c = inf_skip_spaces (' ');
1281                       if (c == ')')
1282                         {
1283                           fprintf (outf, " _PARAMS((%s))", fn->params);
1284                         }
1285                       else
1286                         {
1287                           putc ('(', outf);
1288                           (void) INF_UNGET (c);
1289                         }
1290                     }
1291                   else
1292                     fprintf (outf, " %c", c);
1293                 }
1294             }
1295           else
1296             {
1297               putc (c, outf);
1298               if (c == '\n')
1299                 break;
1300             }
1301         }
1302       if (c == EOF)
1303         break;
1304       lineno++;
1305     }
1306   if (rbrac_line < 0)
1307     write_rbrac ();
1308
1309   fclose (outf);
1310
1311   return 0;
1312 }
1313 \f
1314 /* Stub error functions.  These replace cpperror.c,
1315    because we want to suppress error messages.  */
1316
1317 void
1318 cpp_file_line_for_message (pfile, filename, line, column)
1319      cpp_reader * pfile ATTRIBUTE_UNUSED;
1320      char *filename;
1321      int line, column;
1322 {
1323   if (!verbose)
1324     return;
1325   if (column > 0)
1326     fprintf (stderr, "%s:%d:%d: ", filename, line, column);
1327   else
1328     fprintf (stderr, "%s:%d: ", filename, line);
1329 }
1330
1331 void
1332 cpp_print_containing_files (pfile)
1333      cpp_reader *pfile ATTRIBUTE_UNUSED;
1334 {
1335 }
1336
1337 /* IS_ERROR is 2 for fatal error, 1 for error, 0 for warning */
1338
1339 void
1340 v_cpp_message (pfile, is_error, msg, ap)
1341      cpp_reader *pfile;
1342      int is_error;
1343      const char *msg;
1344      va_list ap;
1345 {
1346   if (is_error == 1)
1347     pfile->errors++;
1348   else if (is_error > 1)
1349     pfile->errors = CPP_FATAL_LIMIT;
1350   if (!verbose)
1351     return;
1352   if (!is_error)
1353     fprintf (stderr, "warning: ");
1354   vfprintf (stderr, msg, ap);
1355   fprintf (stderr, "\n");
1356 }
1357
1358 void
1359 cpp_message VPROTO ((cpp_reader *pfile, int is_error, const char *msg, ...))
1360 {
1361 #ifndef ANSI_PROTOTYPES
1362   cpp_reader *pfile;
1363   int is_error;
1364   const char *msg;
1365 #endif
1366   va_list ap;
1367
1368   VA_START (ap, msg);
1369
1370 #ifndef ANSI_PROTOTYPES
1371   pfile = va_arg (ap, cpp_reader *);
1372   is_error = va_arg (ap, const int);
1373   msg = va_arg (ap, const char *);
1374 #endif
1375
1376   v_cpp_message(pfile, is_error, msg, ap);
1377   va_end(ap);
1378 }
1379
1380 static void
1381 v_fatal (str, ap)
1382   const char * str;
1383   va_list ap;
1384 {
1385   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1386   vfprintf (stderr, str, ap);
1387   fprintf (stderr, "\n");
1388
1389   exit (FATAL_EXIT_CODE);
1390 }
1391
1392 void
1393 fatal VPROTO ((const char *str, ...))
1394 {
1395 #ifndef ANSI_PROTOTYPES
1396   const char *str;
1397 #endif
1398   va_list ap;
1399
1400   VA_START(ap, str);
1401
1402 #ifndef ANSI_PROTOTYPES
1403   str = va_arg (ap, const char *);
1404 #endif
1405
1406   v_fatal(str, ap);
1407   va_end(ap);
1408 }
1409
1410 void
1411 cpp_fatal VPROTO ((cpp_reader * pfile ATTRIBUTE_UNUSED, const char *str, ...))
1412 {
1413 #ifndef ANSI_PROTOTYPES
1414   cpp_reader * pfile;
1415   const char *str;
1416 #endif
1417   va_list ap;
1418
1419   VA_START(ap, str);
1420
1421 #ifndef ANSI_PROTOTYPES
1422   pfile = va_arg (ap, cpp_reader *);
1423   str = va_arg (ap, const char *);
1424 #endif
1425
1426   v_fatal(str, ap);
1427   va_end(ap);
1428 }
1429
1430 void
1431 cpp_pfatal_with_name (pfile, name)
1432      cpp_reader *pfile;
1433      const char *name;
1434 {
1435   cpp_perror_with_name (pfile, name);
1436   exit (FATAL_EXIT_CODE);
1437 }