gcc/fix-header.c

   1 /* fix-header.c - Make C header file suitable for C++.
   2    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
   4
   5 This program is free software; you can redistribute it and/or modify it
   6 under the terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option) any
   8 later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 /* This program massages a system include file (such as stdio.h),
  20    into a form that is compatible with GNU C and GNU C++.
  21
  22    * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
  23    if they seem to be needed.  These prevent C++ compilers from name
  24    mangling the functions inside the braces.
  25
  26    * If an old-style incomplete function declaration is seen (without
  27    an argument list), and it is a "standard" function listed in
  28    the file sys-protos.h (and with a non-empty argument list), then
  29    the declaration is converted to a complete prototype by replacing
  30    the empty parameter list with the argument list from sys-protos.h.
  31
  32    * The program can be given a list of (names of) required standard
  33    functions (such as fclose for stdio.h).  If a required function
  34    is not seen in the input, then a prototype for it will be
  35    written to the output.
  36
  37    * If all of the non-comment code of the original file is protected
  38    against multiple inclusion:
  39         #ifndef FOO
  40         #define FOO
  41         <body of include file>
  42         #endif
  43    then extra matter added to the include file is placed inside the <body>.
  44
  45    * If the input file is OK (nothing needs to be done);
  46    the output file is not written (nor removed if it exists).
  47
  48    There are also some special actions that are done for certain
  49    well-known standard include files:
  50
  51    * If argv[1] is "sys/stat.h", the Posix.1 macros
  52    S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
  53    they were missing, and the corresponding "traditional" S_IFxxx
  54    macros were defined.
  55
  56    * If argv[1] is "errno.h", errno is declared if it was missing.
  57
  58    * TODO:  The input file should be read complete into memory, because:
  59    a) it needs to be scanned twice anyway, and
  60    b) it would be nice to allow update in place.
  61
  62    Usage:
  63         fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
  64    where:
  65    * FOO.H is the relative file name of the include file,
  66    as it would be #include'd by a C file.  (E.g. stdio.h)
  67    * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
  68    * OUTFILE.H is the full pathname for where to write the output file,
  69    if anything needs to be done.  (e.g. ./include/stdio.h)
  70    * OPTIONS can be -D or -I switches as you would pass to cpp.
  71
  72    Written by Per Bothner <bothner@cygnus.com>, July 1993.  */
  73
  74 #include "bconfig.h"
  75 #include "system.h"
  76 #include "coretypes.h"
  77 #include "tm.h"
  78 #include "obstack.h"
  79 #include "scan.h"
  80 #include "cpplib.h"
  81 #include "c-incpath.h"
  82
  83 static void v_fatal (const char *, va_list)
  84      ATTRIBUTE_PRINTF (1,0) ATTRIBUTE_NORETURN;
  85 static void fatal (const char *, ...) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  86
  87 sstring buf;
  88
  89 int verbose = 0;
  90 int partial_count = 0;
  91 int warnings = 0;
  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 const char *const 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 static const char *cur_file;
 118
 119 /* Certain standard files get extra treatment */
 120
 121 enum special_file
 122 {
 123   no_special,
 124 #ifdef errno_h
 125 #undef errno_h
 126 #endif
 127   errno_h,
 128 #ifdef stdio_h
 129 #undef stdio_h
 130 #endif
 131   stdio_h,
 132 #ifdef stdlib_h
 133 #undef stdlib_h
 134 #endif
 135   stdlib_h,
 136 #ifdef sys_stat_h
 137 #undef sys_stat_h
 138 #endif
 139   sys_stat_h
 140 };
 141
 142 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 143    by an empty name (i.e. by "\0\0").  */
 144
 145 typedef const char *namelist;
 146
 147 /* The following macros provide the bits for symbol_flags.  */
 148 typedef int symbol_flags;
 149
 150 /* Used to mark names defined in the ANSI/ISO C standard.  */
 151 #define ANSI_SYMBOL 1
 152
 153 /* We no longer massage include files for POSIX or XOPEN symbols,
 154    as there are now several versions of the POSIX and XOPEN standards,
 155    and it would be a maintenance nightmare for us to track them all.
 156    Better to be compatible with the system include files.  */
 157 /*#define ADD_MISSING_POSIX 1 */
 158 /*#define ADD_MISSING_XOPEN 1 */
 159
 160 #if ADD_MISSING_POSIX
 161 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 162 #define POSIX1_SYMBOL 2
 163 #define POSIX2_SYMBOL 4
 164 #else
 165 #define POSIX1_SYMBOL 0
 166 #define POSIX2_SYMBOL 0
 167 #endif
 168
 169 #if ADD_MISSING_XOPEN
 170 /* Used to mark names defined in X/Open Portability Guide.  */
 171 #define XOPEN_SYMBOL 8
 172 /* Used to mark names defined in X/Open UNIX Extensions.  */
 173 #define XOPEN_EXTENDED_SYMBOL 16
 174 #else
 175 #define XOPEN_SYMBOL 0
 176 #define XOPEN_EXTENDED_SYMBOL 0
 177 #endif
 178
 179 /* Used to indicate names that are not functions */
 180 #define MACRO_SYMBOL 512
 181
 182 struct symbol_list {
 183   symbol_flags flags;
 184   namelist names;
 185 };
 186
 187 #define SYMBOL_TABLE_SIZE 10
 188 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 189 int cur_symbol_table_size;
 190
 191 static void add_symbols (symbol_flags, namelist);
 192 static struct fn_decl *lookup_std_proto (const char *, int);
 193 static void write_lbrac (void);
 194 static void recognized_macro (const char *);
 195 static void check_macro_names (cpp_reader *, namelist);
 196 static void read_scan_file (char *, int, char **);
 197 static void write_rbrac (void);
 198 static int inf_skip_spaces (int);
 199 static int inf_read_upto (sstring *, int);
 200 static int inf_scan_ident (sstring *, int);
 201 static int check_protection (int *, int *);
 202 static void cb_file_change (cpp_reader *, const struct line_map *);
 203
 204 static void
 205 add_symbols (symbol_flags flags, namelist names)
 206 {
 207   symbol_table[cur_symbol_table_size].flags = flags;
 208   symbol_table[cur_symbol_table_size].names = names;
 209   cur_symbol_table_size++;
 210   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 211     fatal ("too many calls to add_symbols");
 212   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 213 }
 214
 215 struct std_include_entry {
 216   const char *const name;
 217   const symbol_flags flags;
 218   const namelist names;
 219 };
 220
 221 const char NONE[] = "";  /* The empty namelist.  */
 222
 223 /* Special name to indicate a continuation line in std_include_table.  */
 224 const char CONTINUED[] = "";
 225
 226 const struct std_include_entry *include_entry;
 227
 228 const struct std_include_entry std_include_table [] = {
 229   { "ctype.h", ANSI_SYMBOL,
 230       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 231 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 232
 233   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 234
 235   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 236
 237   /* ANSI_SYMBOL is wrong, but ...  */
 238   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 239 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 240 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 241 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 242 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 243
 244   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 245
 246   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 247   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 248
 249 /*{ "limit.h", ... provided by gcc }, */
 250
 251   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 252
 253   { "math.h", ANSI_SYMBOL,
 254       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 255 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 256 tan\0tanh\0" },
 257
 258   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 259
 260   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 261
 262   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 263   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 264
 265   /* Left out signal() - its prototype is too complex for us!
 266      Also left out "sigaction sigaddset sigdelset sigemptyset
 267      sigfillset sigismember sigpending sigprocmask sigsuspend"
 268      because these need sigset_t or struct sigaction.
 269      Most systems that provide them will also declare them.  */
 270   { "signal.h", ANSI_SYMBOL, "kill\0raise\0" },
 271
 272   { "stdio.h", ANSI_SYMBOL,
 273       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 274 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 275 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 276 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 277 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 278 tmpnam\0ungetc\0" },
 279   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 280   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 281 /* Should perhaps also handle NULL, EOF, ... ? */
 282
 283   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 284      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 285      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 286      Should perhaps also add NULL */
 287   { "stdlib.h", ANSI_SYMBOL,
 288       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 289 exit\0free\0getenv\0labs\0malloc\0putenv\0qsort\0rand\0realloc\0\
 290 srand\0strtod\0strtol\0strtoul\0system\0" },
 291   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 292
 293   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 294 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 295 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 296 strtok\0strxfrm\0" },
 297 /* Should perhaps also add NULL and size_t */
 298
 299   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 300       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 301
 302   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 303
 304   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 305      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 306      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 307   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 308
 309   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 310
 311   { "sys/stat.h", POSIX1_SYMBOL,
 312       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 313   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 314       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 315 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 316   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 317
 318 #if 0
 319 /* How do we handle fd_set? */
 320   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 321   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 322 #endif
 323
 324   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 325   /* "sys/types.h" add types (not in old g++-include) */
 326
 327   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 328
 329   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 330   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 331       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 332 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 333
 334   { "tar.h", POSIX1_SYMBOL, NONE },
 335
 336   { "termios.h", POSIX1_SYMBOL,
 337       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 338
 339   { "time.h", ANSI_SYMBOL,
 340       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0tzset\0" },
 341
 342   { "unistd.h", POSIX1_SYMBOL,
 343       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 344 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 345 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 346 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 347 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 348 ttyname\0unlink\0write\0" },
 349   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 350   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 351       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 352
 353   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 354
 355   { NULL, 0, NONE }
 356 };
 357
 358 enum special_file special_file_handling = no_special;
 359
 360 /* They are set if the corresponding macro has been seen.  */
 361 /* The following are only used when handling sys/stat.h */
 362 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 363 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 364 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 365 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 366 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 367 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 368 /* The following are only used when handling errno.h */
 369 int seen_errno = 0;
 370 /* The following are only used when handling stdlib.h */
 371 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 372 \f
 373 struct obstack scan_file_obstack;
 374
 375 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 376
 377 static struct fn_decl *
 378 lookup_std_proto (const char *name, int name_length)
 379 {
 380   int i = hashstr (name, name_length) % HASH_SIZE;
 381   int i0 = i;
 382   for (;;)
 383     {
 384       struct fn_decl *fn;
 385       if (hash_tab[i] == 0)
 386         return NULL;
 387       fn = &std_protos[hash_tab[i]];
 388       if ((int) strlen (fn->fname) == name_length
 389           && strncmp (fn->fname, name, name_length) == 0)
 390         return fn;
 391       i = (i+1) % HASH_SIZE;
 392       if (i == i0)
 393         abort ();
 394     }
 395 }
 396
 397 char *inc_filename;
 398 int inc_filename_length;
 399 const char *progname = "fix-header";
 400 FILE *outf;
 401 sstring line;
 402
 403 int lbrac_line, rbrac_line;
 404
 405 int required_unseen_count = 0;
 406 int required_other = 0;
 407
 408 static void
 409 write_lbrac (void)
 410 {
 411   if (partial_count)
 412     {
 413       fprintf (outf, "#ifndef _PARAMS\n");
 414       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 415       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 416       fprintf (outf, "#else\n");
 417       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 418       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 419     }
 420 }
 421
 422 struct partial_proto
 423 {
 424   struct partial_proto *next;
 425   struct fn_decl *fn;
 426   int line_seen;
 427 };
 428
 429 struct partial_proto *partial_proto_list = NULL;
 430
 431 struct partial_proto required_dummy_proto, seen_dummy_proto;
 432 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 433 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 434 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 435 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 436
 437 static void
 438 recognized_macro (const char *fname)
 439 {
 440   /* The original include file defines fname as a macro.  */
 441   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 442
 443   /* Since fname is a macro, don't require a prototype for it.  */
 444   if (fn)
 445     {
 446       if (REQUIRED (fn))
 447         required_unseen_count--;
 448       SET_SEEN (fn);
 449     }
 450
 451   switch (special_file_handling)
 452     {
 453     case errno_h:
 454       if (strcmp (fname, "errno") == 0 && !seen_errno)
 455         seen_errno = 1, required_other--;
 456       break;
 457     case stdlib_h:
 458       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 459         seen_EXIT_FAILURE = 1, required_other--;
 460       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 461         seen_EXIT_SUCCESS = 1, required_other--;
 462       break;
 463     case sys_stat_h:
 464       if (fname[0] == 'S' && fname[1] == '_')
 465         {
 466           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 467           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 468           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 469           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 470           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 471           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 472           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 473           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 474           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 475           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 476           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 477           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 478         }
 479       break;
 480
 481     default:
 482       break;
 483     }
 484 }
 485
 486 void
 487 recognized_extern (const cpp_token *name)
 488 {
 489   switch (special_file_handling)
 490     {
 491     case errno_h:
 492       if (cpp_ideq (name, "errno"))
 493         seen_errno = 1, required_other--;
 494       break;
 495
 496     default:
 497       break;
 498     }
 499 }
 500
 501 /* Called by scan_decls if it saw a function definition for a function
 502    named FNAME.  KIND is 'I' for an inline function; 'F' if a normal
 503    function declaration preceded by 'extern "C"' (or nested inside
 504    'extern "C"' braces); or 'f' for other function declarations.  */
 505
 506 void
 507 recognized_function (const cpp_token *fname, unsigned int line, int kind,
 508                      int have_arg_list)
 509 {
 510   struct partial_proto *partial;
 511   int i;
 512   struct fn_decl *fn;
 513
 514   fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
 515                          NODE_LEN (fname->val.node));
 516
 517   /* Remove the function from the list of required function.  */
 518   if (fn)
 519     {
 520       if (REQUIRED (fn))
 521         required_unseen_count--;
 522       SET_SEEN (fn);
 523     }
 524
 525   /* If we have a full prototype, we're done.  */
 526   if (have_arg_list)
 527     return;
 528
 529   if (kind == 'I')  /* don't edit inline function */
 530     return;
 531
 532   /* If the partial prototype was included from some other file,
 533      we don't need to patch it up (in this run).  */
 534   i = strlen (cur_file);
 535   if (i < inc_filename_length
 536       || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
 537     return;
 538
 539   if (fn == NULL)
 540     return;
 541   if (fn->params[0] == '\0')
 542     return;
 543
 544   /* We only have a partial function declaration,
 545      so remember that we have to add a complete prototype.  */
 546   partial_count++;
 547   partial = (struct partial_proto *)
 548     obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 549   partial->line_seen = line;
 550   partial->fn = fn;
 551   fn->partial = partial;
 552   partial->next = partial_proto_list;
 553   partial_proto_list = partial;
 554   if (verbose)
 555     {
 556       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 557                inc_filename, fn->fname);
 558     }
 559 }
 560
 561 /* For any name in NAMES that is defined as a macro,
 562    call recognized_macro on it.  */
 563
 564 static void
 565 check_macro_names (cpp_reader *pfile, namelist names)
 566 {
 567   size_t len;
 568   while (*names)
 569     {
 570       len = strlen (names);
 571       if (cpp_defined (pfile, (const unsigned char *)names, len))
 572         recognized_macro (names);
 573       names += len + 1;
 574     }
 575 }
 576
 577 static void
 578 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
 579                 const struct line_map *map)
 580 {
 581   /* Just keep track of current file name.  */
 582   cur_file = map->to_file;
 583 }
 584
 585 static void
 586 read_scan_file (char *in_fname, int argc, char **argv)
 587 {
 588   cpp_reader *scan_in;
 589   cpp_callbacks *cb;
 590   cpp_options *options;
 591   struct fn_decl *fn;
 592   int i, strings_processed;
 593   struct symbol_list *cur_symbols;
 594
 595   obstack_init (&scan_file_obstack);
 596
 597   scan_in = cpp_create_reader (CLK_GNUC89, NULL);
 598   cb = cpp_get_callbacks (scan_in);
 599   cb->file_change = cb_file_change;
 600
 601   /* We are going to be scanning a header file out of its proper context,
 602      so ignore warnings and errors.  */
 603   options = cpp_get_options (scan_in);
 604   options->inhibit_warnings = 1;
 605   options->inhibit_errors = 1;
 606
 607   if (! cpp_read_main_file (scan_in, in_fname))
 608     exit (FATAL_EXIT_CODE);
 609
 610   cpp_change_file (scan_in, LC_RENAME, "<built-in>");
 611   cpp_init_builtins (scan_in, true);
 612   cpp_change_file (scan_in, LC_RENAME, in_fname);
 613
 614   /* Process switches after builtins so -D can override them.  */
 615   for (i = 0; i < argc; i += strings_processed)
 616     {
 617       strings_processed = 0;
 618       if (argv[i][0] == '-')
 619         {
 620           if (argv[i][1] == 'I')
 621             {
 622               if (argv[i][2] != '\0')
 623                 {
 624                   strings_processed = 1;
 625                   add_path (xstrdup (argv[i] + 2), BRACKET, false);
 626                 }
 627               else if (i + 1 != argc)
 628                 {
 629                   strings_processed = 2;
 630                   add_path (xstrdup (argv[i + 1]), BRACKET, false);
 631                 }
 632             }
 633           else if (argv[i][1] == 'D')
 634             {
 635               if (argv[i][2] != '\0')
 636                 strings_processed = 1, cpp_define (scan_in, argv[i] + 2);
 637               else if (i + 1 != argc)
 638                 strings_processed = 2, cpp_define (scan_in, argv[i + 1]);
 639             }
 640         }
 641
 642       if (strings_processed == 0)
 643         break;
 644     }
 645
 646   if (i < argc)
 647     cpp_error (scan_in, DL_ERROR, "invalid option `%s'", argv[i]);
 648   if (cpp_errors (scan_in))
 649     exit (FATAL_EXIT_CODE);
 650
 651   register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
 652                            true /* stdinc */, false /* cxx_stdinc */,
 653                            false /* verbose */);
 654
 655   /* We are scanning a system header, so mark it as such.  */
 656   cpp_make_system_header (scan_in, 1, 0);
 657
 658   scan_decls (scan_in, argc, argv);
 659   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 660     check_macro_names (scan_in, cur_symbols->names);
 661
 662   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 663      If so, those functions are also required.  */
 664   if (special_file_handling == stdio_h
 665       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 666     {
 667       unsigned char getchar_call[] = "getchar();\n";
 668       int seen_filbuf = 0;
 669
 670       /* Scan the macro expansion of "getchar();".  */
 671       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 672                        /* from_stage3 */ true, 1);
 673       for (;;)
 674         {
 675           const cpp_token *t = cpp_get_token (scan_in);
 676
 677           if (t->type == CPP_EOF)
 678             break;
 679           else if (cpp_ideq (t, "_filbuf"))
 680             seen_filbuf++;
 681         }
 682
 683       if (seen_filbuf)
 684         {
 685           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 686           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 687           int need_flsbuf
 688             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 689
 690           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 691           if (need_filbuf + need_flsbuf)
 692             {
 693               const char *new_list;
 694               if (need_filbuf)
 695                 SET_REQUIRED (fn);
 696               if (need_flsbuf)
 697                 SET_REQUIRED (flsbuf_fn);
 698               if (need_flsbuf && need_filbuf)
 699                 new_list = "_filbuf\0_flsbuf\0";
 700               else if (need_flsbuf)
 701                 new_list = "_flsbuf\0";
 702               else /* if (need_flsbuf) */
 703                 new_list = "_filbuf\0";
 704               add_symbols (ANSI_SYMBOL, new_list);
 705               required_unseen_count += need_filbuf + need_flsbuf;
 706             }
 707         }
 708     }
 709
 710   if (required_unseen_count + partial_count + required_other == 0)
 711     {
 712       if (verbose)
 713         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 714       exit (SUCCESS_EXIT_CODE);
 715     }
 716   if (!verbose)
 717     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 718   else
 719     {
 720       if (required_unseen_count)
 721         fprintf (stderr, "%s: %d missing function declarations.\n",
 722                  inc_filename, required_unseen_count);
 723       if (partial_count)
 724         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 725                  inc_filename, partial_count);
 726     }
 727 }
 728
 729 static void
 730 write_rbrac (void)
 731 {
 732   struct fn_decl *fn;
 733   const char *cptr;
 734   struct symbol_list *cur_symbols;
 735
 736   if (required_unseen_count)
 737     {
 738 #ifdef NO_IMPLICIT_EXTERN_C
 739       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 740 #endif
 741     }
 742
 743   /* Now we print out prototypes for those functions that we haven't seen.  */
 744   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 745     {
 746       int if_was_emitted = 0;
 747       int name_len;
 748       cptr = cur_symbols->names;
 749       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 750         {
 751           int macro_protect = 0;
 752
 753           if (cur_symbols->flags & MACRO_SYMBOL)
 754             continue;
 755
 756           fn = lookup_std_proto (cptr, name_len);
 757           if (fn == NULL || !REQUIRED (fn))
 758             continue;
 759
 760           if (!if_was_emitted)
 761             {
 762 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 763               if (cur_symbols->flags & ANSI_SYMBOL)
 764                 fprintf (outf,
 765          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 766               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 767                 fprintf (outf,
 768        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 769     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 770     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 771               else if (cur_symbols->flags & XOPEN_SYMBOL)
 772                 {
 773                 fprintf (outf,
 774        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 775    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 776                 }
 777               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 778                 {
 779                 fprintf (outf,
 780        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 781    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 782                 }
 783               else
 784                 {
 785                   fatal ("internal error for function %s", fn->fname);
 786                 }
 787               if_was_emitted = 1;
 788             }
 789
 790           /* In the case of memmove, protect in case the application
 791              defines it as a macro before including the header.  */
 792           if (!strcmp (fn->fname, "memmove")
 793               || !strcmp (fn->fname, "putc")
 794               || !strcmp (fn->fname, "getc")
 795               || !strcmp (fn->fname, "vprintf")
 796               || !strcmp (fn->fname, "vfprintf")
 797               || !strcmp (fn->fname, "vsprintf")
 798               || !strcmp (fn->fname, "rewinddir")
 799               || !strcmp (fn->fname, "abort"))
 800             macro_protect = 1;
 801
 802           if (macro_protect)
 803             fprintf (outf, "#ifndef %s\n", fn->fname);
 804           fprintf (outf, "extern %s %s (%s);\n",
 805                    fn->rtype, fn->fname, fn->params);
 806           if (macro_protect)
 807             fprintf (outf, "#endif\n");
 808         }
 809       if (if_was_emitted)
 810         fprintf (outf,
 811                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 812     }
 813   if (required_unseen_count)
 814     {
 815 #ifdef NO_IMPLICIT_EXTERN_C
 816       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 817 #endif
 818     }
 819
 820   switch (special_file_handling)
 821     {
 822     case errno_h:
 823       if (!seen_errno)
 824         fprintf (outf, "extern int errno;\n");
 825       break;
 826     case stdlib_h:
 827       if (!seen_EXIT_FAILURE)
 828         fprintf (outf, "#define EXIT_FAILURE 1\n");
 829       if (!seen_EXIT_SUCCESS)
 830         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 831       break;
 832     case sys_stat_h:
 833       if (!seen_S_ISBLK && seen_S_IFBLK)
 834         fprintf (outf,
 835                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 836       if (!seen_S_ISCHR && seen_S_IFCHR)
 837         fprintf (outf,
 838                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 839       if (!seen_S_ISDIR && seen_S_IFDIR)
 840         fprintf (outf,
 841                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 842       if (!seen_S_ISFIFO && seen_S_IFIFO)
 843         fprintf (outf,
 844                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 845       if (!seen_S_ISLNK && seen_S_IFLNK)
 846         fprintf (outf,
 847                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 848       if (!seen_S_ISREG && seen_S_IFREG)
 849         fprintf (outf,
 850                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 851       break;
 852
 853     default:
 854       break;
 855     }
 856
 857 }
 858
 859 /* Returns 1 iff the file is properly protected from multiple inclusion:
 860    #ifndef PROTECT_NAME
 861    #define PROTECT_NAME
 862    #endif
 863
 864  */
 865
 866 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 867 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 868
 869 static int
 870 inf_skip_spaces (int c)
 871 {
 872   for (;;)
 873     {
 874       if (c == ' ' || c == '\t')
 875         c = INF_GET ();
 876       else if (c == '/')
 877         {
 878           c = INF_GET ();
 879           if (c != '*')
 880             {
 881               (void) INF_UNGET (c);
 882               return '/';
 883             }
 884           c = INF_GET ();
 885           for (;;)
 886             {
 887               if (c == EOF)
 888                 return EOF;
 889               else if (c != '*')
 890                 {
 891                   if (c == '\n')
 892                     source_lineno++, lineno++;
 893                   c = INF_GET ();
 894                 }
 895               else if ((c = INF_GET ()) == '/')
 896                 return INF_GET ();
 897             }
 898         }
 899       else
 900         break;
 901     }
 902   return c;
 903 }
 904
 905 /* Read into STR from inf_buffer upto DELIM.  */
 906
 907 static int
 908 inf_read_upto (sstring *str, int delim)
 909 {
 910   int ch;
 911   for (;;)
 912     {
 913       ch = INF_GET ();
 914       if (ch == EOF || ch == delim)
 915         break;
 916       SSTRING_PUT (str, ch);
 917     }
 918   MAKE_SSTRING_SPACE (str, 1);
 919   *str->ptr = 0;
 920   return ch;
 921 }
 922
 923 static int
 924 inf_scan_ident (sstring *s, int c)
 925 {
 926   s->ptr = s->base;
 927   if (ISIDST (c))
 928     {
 929       for (;;)
 930         {
 931           SSTRING_PUT (s, c);
 932           c = INF_GET ();
 933           if (c == EOF || !(ISIDNUM (c)))
 934             break;
 935         }
 936     }
 937   MAKE_SSTRING_SPACE (s, 1);
 938   *s->ptr = 0;
 939   return c;
 940 }
 941
 942 /* Returns 1 if the file is correctly protected against multiple
 943    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 944    and setting *endif_line to the final #endif.
 945    Otherwise return 0.  */
 946
 947 static int
 948 check_protection (int *ifndef_line, int *endif_line)
 949 {
 950   int c;
 951   int if_nesting = 1; /* Level of nesting of #if's */
 952   char *protect_name = NULL; /* Identifier following initial #ifndef */
 953   int define_seen = 0;
 954
 955   /* Skip initial white space (including comments).  */
 956   for (;; lineno++)
 957     {
 958       c = inf_skip_spaces (' ');
 959       if (c == EOF)
 960         return 0;
 961       if (c != '\n')
 962         break;
 963     }
 964   if (c != '#')
 965     return 0;
 966   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 967   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 968     return 0;
 969
 970   /* So far so good: We've seen an initial #ifndef.  */
 971   *ifndef_line = lineno;
 972   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 973   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 974     return 0;
 975   protect_name = xstrdup (buf.base);
 976
 977   (void) INF_UNGET (c);
 978   c = inf_read_upto (&buf, '\n');
 979   if (c == EOF)
 980     return 0;
 981   lineno++;
 982
 983   for (;;)
 984     {
 985       c = inf_skip_spaces (' ');
 986       if (c == EOF)
 987         return 0;
 988       if (c == '\n')
 989         {
 990           lineno++;
 991           continue;
 992         }
 993       if (c != '#')
 994         goto skip_to_eol;
 995       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 996       if (SSTRING_LENGTH (&buf) == 0)
 997         ;
 998       else if (!strcmp (buf.base, "ifndef")
 999           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1000         {
1001           if_nesting++;
1002         }
1003       else if (!strcmp (buf.base, "endif"))
1004         {
1005           if_nesting--;
1006           if (if_nesting == 0)
1007             break;
1008         }
1009       else if (!strcmp (buf.base, "else"))
1010         {
1011           if (if_nesting == 1)
1012             return 0;
1013         }
1014       else if (!strcmp (buf.base, "define"))
1015         {
1016           c = inf_skip_spaces (c);
1017           c = inf_scan_ident (&buf, c);
1018           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1019             define_seen = 1;
1020         }
1021     skip_to_eol:
1022       for (;;)
1023         {
1024           if (c == '\n' || c == EOF)
1025             break;
1026           c = INF_GET ();
1027         }
1028       if (c == EOF)
1029         return 0;
1030       lineno++;
1031     }
1032
1033   if (!define_seen)
1034      return 0;
1035   *endif_line = lineno;
1036   /* Skip final white space (including comments).  */
1037   for (;;)
1038     {
1039       c = inf_skip_spaces (' ');
1040       if (c == EOF)
1041         break;
1042       if (c != '\n')
1043         return 0;
1044     }
1045
1046   return 1;
1047 }
1048
1049 extern int main (int, char **);
1050
1051 int
1052 main (int argc, char **argv)
1053 {
1054   int inf_fd;
1055   struct stat sbuf;
1056   int c;
1057 #ifdef FIXPROTO_IGNORE_LIST
1058   int i;
1059 #endif
1060   const char *cptr;
1061   int ifndef_line;
1062   int endif_line;
1063   long to_read;
1064   long int inf_size;
1065   struct symbol_list *cur_symbols;
1066
1067   if (argv[0] && argv[0][0])
1068     {
1069       char *p;
1070
1071       progname = 0;
1072       for (p = argv[0]; *p; p++)
1073         if (*p == '/')
1074           progname = p;
1075       progname = progname ? progname+1 : argv[0];
1076     }
1077
1078   if (argc < 4)
1079     {
1080       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1081                progname);
1082       exit (FATAL_EXIT_CODE);
1083     }
1084
1085   inc_filename = argv[1];
1086   inc_filename_length = strlen (inc_filename);
1087
1088 #ifdef FIXPROTO_IGNORE_LIST
1089   for (i = 0; files_to_ignore[i] != NULL; i++)
1090     {
1091       const char *const ignore_name = files_to_ignore[i];
1092       int ignore_len = strlen (ignore_name);
1093       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1094         {
1095           if (ignore_name[ignore_len-1] == '/'
1096               || inc_filename[ignore_len] == '\0')
1097             {
1098               if (verbose)
1099                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1100               exit (SUCCESS_EXIT_CODE);
1101             }
1102         }
1103
1104     }
1105 #endif
1106
1107   if (strcmp (inc_filename, "sys/stat.h") == 0)
1108     special_file_handling = sys_stat_h;
1109   else if (strcmp (inc_filename, "errno.h") == 0)
1110     special_file_handling = errno_h, required_other++;
1111   else if (strcmp (inc_filename, "stdlib.h") == 0)
1112     special_file_handling = stdlib_h, required_other+=2;
1113   else if (strcmp (inc_filename, "stdio.h") == 0)
1114     special_file_handling = stdio_h;
1115   include_entry = std_include_table;
1116   while (include_entry->name != NULL
1117          && ((strcmp (include_entry->name, CONTINUED) == 0)
1118              || strcmp (inc_filename, include_entry->name) != 0))
1119     include_entry++;
1120
1121   if (include_entry->name != NULL)
1122     {
1123       const struct std_include_entry *entry;
1124       cur_symbol_table_size = 0;
1125       for (entry = include_entry; ;)
1126         {
1127           if (entry->flags)
1128             add_symbols (entry->flags, entry->names);
1129           entry++;
1130           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1131             break;
1132         }
1133     }
1134   else
1135     symbol_table[0].names = NULL;
1136
1137   /* Count and mark the prototypes required for this include file.  */
1138   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1139     {
1140       int name_len;
1141       if (cur_symbols->flags & MACRO_SYMBOL)
1142         continue;
1143       cptr = cur_symbols->names;
1144       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1145         {
1146           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1147           required_unseen_count++;
1148           if (fn == NULL)
1149             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1150           else
1151             SET_REQUIRED (fn);
1152         }
1153     }
1154
1155   read_scan_file (argv[2], argc - 4, argv + 4);
1156
1157   inf_fd = open (argv[2], O_RDONLY, 0666);
1158   if (inf_fd < 0)
1159     {
1160       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1161                progname, argv[2]);
1162       perror (NULL);
1163       exit (FATAL_EXIT_CODE);
1164     }
1165   if (fstat (inf_fd, &sbuf) < 0)
1166     {
1167       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1168       perror (NULL);
1169       exit (FATAL_EXIT_CODE);
1170     }
1171   inf_size = sbuf.st_size;
1172   inf_buffer = (char *) xmalloc (inf_size + 2);
1173   inf_ptr = inf_buffer;
1174
1175   to_read = inf_size;
1176   while (to_read > 0)
1177     {
1178       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1179       if (i < 0)
1180         {
1181           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1182           perror (NULL);
1183           exit (FATAL_EXIT_CODE);
1184         }
1185       if (i == 0)
1186         {
1187           inf_size -= to_read;
1188           break;
1189         }
1190       to_read -= i;
1191     }
1192
1193   close (inf_fd);
1194
1195   /* Inf_size may have changed if read was short (as on VMS) */
1196   inf_buffer[inf_size] = '\n';
1197   inf_buffer[inf_size + 1] = '\0';
1198   inf_limit = inf_buffer + inf_size;
1199
1200   /* If file doesn't end with '\n', add one.  */
1201   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1202     inf_limit++;
1203
1204   unlink (argv[3]);
1205   outf = fopen (argv[3], "w");
1206   if (outf == NULL)
1207     {
1208       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1209                progname, argv[3]);
1210       perror (NULL);
1211       exit (FATAL_EXIT_CODE);
1212     }
1213
1214   lineno = 1;
1215
1216   if (check_protection (&ifndef_line, &endif_line))
1217     {
1218       lbrac_line = ifndef_line+1;
1219       rbrac_line = endif_line;
1220     }
1221   else
1222     {
1223       lbrac_line = 1;
1224       rbrac_line = -1;
1225     }
1226
1227   /* Reset input file.  */
1228   inf_ptr = inf_buffer;
1229   lineno = 1;
1230
1231   for (;;)
1232     {
1233       if (lineno == lbrac_line)
1234         write_lbrac ();
1235       if (lineno == rbrac_line)
1236         write_rbrac ();
1237       for (;;)
1238         {
1239           struct fn_decl *fn;
1240           c = INF_GET ();
1241           if (c == EOF)
1242             break;
1243           if (ISIDST (c))
1244             {
1245               c = inf_scan_ident (&buf, c);
1246               (void) INF_UNGET (c);
1247               fputs (buf.base, outf);
1248               fn = lookup_std_proto (buf.base, strlen (buf.base));
1249               /* We only want to edit the declaration matching the one
1250                  seen by scan-decls, as there can be multiple
1251                  declarations, selected by #ifdef __STDC__ or whatever.  */
1252               if (fn && fn->partial && fn->partial->line_seen == lineno)
1253                 {
1254                   c = inf_skip_spaces (' ');
1255                   if (c == EOF)
1256                     break;
1257                   if (c == '(')
1258                     {
1259                       c = inf_skip_spaces (' ');
1260                       if (c == ')')
1261                         {
1262                           fprintf (outf, " _PARAMS((%s))", fn->params);
1263                         }
1264                       else
1265                         {
1266                           putc ('(', outf);
1267                           (void) INF_UNGET (c);
1268                         }
1269                     }
1270                   else
1271                     fprintf (outf, " %c", c);
1272                 }
1273             }
1274           else
1275             {
1276               putc (c, outf);
1277               if (c == '\n')
1278                 break;
1279             }
1280         }
1281       if (c == EOF)
1282         break;
1283       lineno++;
1284     }
1285   if (rbrac_line < 0)
1286     write_rbrac ();
1287
1288   fclose (outf);
1289
1290   return 0;
1291 }
1292 \f
1293
1294 static void
1295 v_fatal (const char *str, va_list ap)
1296 {
1297   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1298   vfprintf (stderr, str, ap);
1299   fprintf (stderr, "\n");
1300
1301   exit (FATAL_EXIT_CODE);
1302 }
1303
1304 static void
1305 fatal (const char *str, ...)
1306 {
1307   va_list ap;
1308
1309   va_start (ap, str);
1310   v_fatal (str, ap);
1311   va_end (ap);
1312 }