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 = obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 548   partial->line_seen = line;
 549   partial->fn = fn;
 550   fn->partial = partial;
 551   partial->next = partial_proto_list;
 552   partial_proto_list = partial;
 553   if (verbose)
 554     {
 555       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 556                inc_filename, fn->fname);
 557     }
 558 }
 559
 560 /* For any name in NAMES that is defined as a macro,
 561    call recognized_macro on it.  */
 562
 563 static void
 564 check_macro_names (cpp_reader *pfile, namelist names)
 565 {
 566   size_t len;
 567   while (*names)
 568     {
 569       len = strlen (names);
 570       if (cpp_defined (pfile, (const unsigned char *)names, len))
 571         recognized_macro (names);
 572       names += len + 1;
 573     }
 574 }
 575
 576 static void
 577 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
 578                 const struct line_map *map)
 579 {
 580   /* Just keep track of current file name.  */
 581   cur_file = map == NULL ? NULL : map->to_file;
 582 }
 583
 584 static void
 585 read_scan_file (char *in_fname, int argc, char **argv)
 586 {
 587   cpp_reader *scan_in;
 588   cpp_callbacks *cb;
 589   cpp_options *options;
 590   struct fn_decl *fn;
 591   int i, strings_processed;
 592   struct symbol_list *cur_symbols;
 593
 594   obstack_init (&scan_file_obstack);
 595
 596   scan_in = cpp_create_reader (CLK_GNUC89, NULL);
 597   cb = cpp_get_callbacks (scan_in);
 598   cb->file_change = cb_file_change;
 599
 600   /* We are going to be scanning a header file out of its proper context,
 601      so ignore warnings and errors.  */
 602   options = cpp_get_options (scan_in);
 603   options->inhibit_warnings = 1;
 604   options->inhibit_errors = 1;
 605   cpp_post_options (scan_in);
 606
 607   if (!cpp_find_main_file (scan_in, in_fname))
 608     exit (FATAL_EXIT_CODE);
 609   cpp_push_main_file (scan_in);
 610
 611   cpp_change_file (scan_in, LC_RENAME, "<built-in>");
 612   cpp_init_builtins (scan_in, true);
 613   cpp_change_file (scan_in, LC_RENAME, in_fname);
 614
 615   /* Process switches after builtins so -D can override them.  */
 616   for (i = 0; i < argc; i += strings_processed)
 617     {
 618       strings_processed = 0;
 619       if (argv[i][0] == '-')
 620         {
 621           if (argv[i][1] == 'I')
 622             {
 623               if (argv[i][2] != '\0')
 624                 {
 625                   strings_processed = 1;
 626                   add_path (xstrdup (argv[i] + 2), BRACKET, false);
 627                 }
 628               else if (i + 1 != argc)
 629                 {
 630                   strings_processed = 2;
 631                   add_path (xstrdup (argv[i + 1]), BRACKET, false);
 632                 }
 633             }
 634           else if (argv[i][1] == 'D')
 635             {
 636               if (argv[i][2] != '\0')
 637                 strings_processed = 1, cpp_define (scan_in, argv[i] + 2);
 638               else if (i + 1 != argc)
 639                 strings_processed = 2, cpp_define (scan_in, argv[i + 1]);
 640             }
 641         }
 642
 643       if (strings_processed == 0)
 644         break;
 645     }
 646
 647   if (i < argc)
 648     cpp_error (scan_in, CPP_DL_ERROR, "invalid option `%s'", argv[i]);
 649   if (cpp_errors (scan_in))
 650     exit (FATAL_EXIT_CODE);
 651
 652   register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
 653                            true /* stdinc */, false /* cxx_stdinc */,
 654                            false /* verbose */);
 655
 656   /* We are scanning a system header, so mark it as such.  */
 657   cpp_make_system_header (scan_in, 1, 0);
 658
 659   scan_decls (scan_in, argc, argv);
 660   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 661     check_macro_names (scan_in, cur_symbols->names);
 662
 663   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 664      If so, those functions are also required.  */
 665   if (special_file_handling == stdio_h
 666       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 667     {
 668       unsigned char getchar_call[] = "getchar();\n";
 669       int seen_filbuf = 0;
 670
 671       /* Scan the macro expansion of "getchar();".  */
 672       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 673                        /* from_stage3 */ true);
 674       for (;;)
 675         {
 676           const cpp_token *t = cpp_get_token (scan_in);
 677
 678           if (t->type == CPP_EOF)
 679             break;
 680           else if (cpp_ideq (t, "_filbuf"))
 681             seen_filbuf++;
 682         }
 683
 684       if (seen_filbuf)
 685         {
 686           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 687           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 688           int need_flsbuf
 689             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 690
 691           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 692           if (need_filbuf + need_flsbuf)
 693             {
 694               const char *new_list;
 695               if (need_filbuf)
 696                 SET_REQUIRED (fn);
 697               if (need_flsbuf)
 698                 SET_REQUIRED (flsbuf_fn);
 699               if (need_flsbuf && need_filbuf)
 700                 new_list = "_filbuf\0_flsbuf\0";
 701               else if (need_flsbuf)
 702                 new_list = "_flsbuf\0";
 703               else /* if (need_flsbuf) */
 704                 new_list = "_filbuf\0";
 705               add_symbols (ANSI_SYMBOL, new_list);
 706               required_unseen_count += need_filbuf + need_flsbuf;
 707             }
 708         }
 709     }
 710
 711   if (required_unseen_count + partial_count + required_other == 0)
 712     {
 713       if (verbose)
 714         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 715       exit (SUCCESS_EXIT_CODE);
 716     }
 717   if (!verbose)
 718     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 719   else
 720     {
 721       if (required_unseen_count)
 722         fprintf (stderr, "%s: %d missing function declarations.\n",
 723                  inc_filename, required_unseen_count);
 724       if (partial_count)
 725         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 726                  inc_filename, partial_count);
 727     }
 728 }
 729
 730 static void
 731 write_rbrac (void)
 732 {
 733   struct fn_decl *fn;
 734   const char *cptr;
 735   struct symbol_list *cur_symbols;
 736
 737   if (required_unseen_count)
 738     {
 739 #ifdef NO_IMPLICIT_EXTERN_C
 740       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 741 #endif
 742     }
 743
 744   /* Now we print out prototypes for those functions that we haven't seen.  */
 745   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 746     {
 747       int if_was_emitted = 0;
 748       int name_len;
 749       cptr = cur_symbols->names;
 750       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 751         {
 752           int macro_protect = 0;
 753
 754           if (cur_symbols->flags & MACRO_SYMBOL)
 755             continue;
 756
 757           fn = lookup_std_proto (cptr, name_len);
 758           if (fn == NULL || !REQUIRED (fn))
 759             continue;
 760
 761           if (!if_was_emitted)
 762             {
 763 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 764               if (cur_symbols->flags & ANSI_SYMBOL)
 765                 fprintf (outf,
 766          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 767               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 768                 fprintf (outf,
 769        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 770     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 771     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 772               else if (cur_symbols->flags & XOPEN_SYMBOL)
 773                 {
 774                 fprintf (outf,
 775        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 776    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 777                 }
 778               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 779                 {
 780                 fprintf (outf,
 781        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 782    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 783                 }
 784               else
 785                 {
 786                   fatal ("internal error for function %s", fn->fname);
 787                 }
 788               if_was_emitted = 1;
 789             }
 790
 791           /* In the case of memmove, protect in case the application
 792              defines it as a macro before including the header.  */
 793           if (!strcmp (fn->fname, "memmove")
 794               || !strcmp (fn->fname, "putc")
 795               || !strcmp (fn->fname, "getc")
 796               || !strcmp (fn->fname, "vprintf")
 797               || !strcmp (fn->fname, "vfprintf")
 798               || !strcmp (fn->fname, "vsprintf")
 799               || !strcmp (fn->fname, "rewinddir")
 800               || !strcmp (fn->fname, "abort"))
 801             macro_protect = 1;
 802
 803           if (macro_protect)
 804             fprintf (outf, "#ifndef %s\n", fn->fname);
 805           fprintf (outf, "extern %s %s (%s);\n",
 806                    fn->rtype, fn->fname, fn->params);
 807           if (macro_protect)
 808             fprintf (outf, "#endif\n");
 809         }
 810       if (if_was_emitted)
 811         fprintf (outf,
 812                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 813     }
 814   if (required_unseen_count)
 815     {
 816 #ifdef NO_IMPLICIT_EXTERN_C
 817       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 818 #endif
 819     }
 820
 821   switch (special_file_handling)
 822     {
 823     case errno_h:
 824       if (!seen_errno)
 825         fprintf (outf, "extern int errno;\n");
 826       break;
 827     case stdlib_h:
 828       if (!seen_EXIT_FAILURE)
 829         fprintf (outf, "#define EXIT_FAILURE 1\n");
 830       if (!seen_EXIT_SUCCESS)
 831         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 832       break;
 833     case sys_stat_h:
 834       if (!seen_S_ISBLK && seen_S_IFBLK)
 835         fprintf (outf,
 836                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 837       if (!seen_S_ISCHR && seen_S_IFCHR)
 838         fprintf (outf,
 839                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 840       if (!seen_S_ISDIR && seen_S_IFDIR)
 841         fprintf (outf,
 842                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 843       if (!seen_S_ISFIFO && seen_S_IFIFO)
 844         fprintf (outf,
 845                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 846       if (!seen_S_ISLNK && seen_S_IFLNK)
 847         fprintf (outf,
 848                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 849       if (!seen_S_ISREG && seen_S_IFREG)
 850         fprintf (outf,
 851                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 852       break;
 853
 854     default:
 855       break;
 856     }
 857
 858 }
 859
 860 /* Returns 1 iff the file is properly protected from multiple inclusion:
 861    #ifndef PROTECT_NAME
 862    #define PROTECT_NAME
 863    #endif
 864
 865  */
 866
 867 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 868 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 869
 870 static int
 871 inf_skip_spaces (int c)
 872 {
 873   for (;;)
 874     {
 875       if (c == ' ' || c == '\t')
 876         c = INF_GET ();
 877       else if (c == '/')
 878         {
 879           c = INF_GET ();
 880           if (c != '*')
 881             {
 882               (void) INF_UNGET (c);
 883               return '/';
 884             }
 885           c = INF_GET ();
 886           for (;;)
 887             {
 888               if (c == EOF)
 889                 return EOF;
 890               else if (c != '*')
 891                 {
 892                   if (c == '\n')
 893                     source_lineno++, lineno++;
 894                   c = INF_GET ();
 895                 }
 896               else if ((c = INF_GET ()) == '/')
 897                 return INF_GET ();
 898             }
 899         }
 900       else
 901         break;
 902     }
 903   return c;
 904 }
 905
 906 /* Read into STR from inf_buffer upto DELIM.  */
 907
 908 static int
 909 inf_read_upto (sstring *str, int delim)
 910 {
 911   int ch;
 912   for (;;)
 913     {
 914       ch = INF_GET ();
 915       if (ch == EOF || ch == delim)
 916         break;
 917       SSTRING_PUT (str, ch);
 918     }
 919   MAKE_SSTRING_SPACE (str, 1);
 920   *str->ptr = 0;
 921   return ch;
 922 }
 923
 924 static int
 925 inf_scan_ident (sstring *s, int c)
 926 {
 927   s->ptr = s->base;
 928   if (ISIDST (c))
 929     {
 930       for (;;)
 931         {
 932           SSTRING_PUT (s, c);
 933           c = INF_GET ();
 934           if (c == EOF || !(ISIDNUM (c)))
 935             break;
 936         }
 937     }
 938   MAKE_SSTRING_SPACE (s, 1);
 939   *s->ptr = 0;
 940   return c;
 941 }
 942
 943 /* Returns 1 if the file is correctly protected against multiple
 944    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 945    and setting *endif_line to the final #endif.
 946    Otherwise return 0.  */
 947
 948 static int
 949 check_protection (int *ifndef_line, int *endif_line)
 950 {
 951   int c;
 952   int if_nesting = 1; /* Level of nesting of #if's */
 953   char *protect_name = NULL; /* Identifier following initial #ifndef */
 954   int define_seen = 0;
 955
 956   /* Skip initial white space (including comments).  */
 957   for (;; lineno++)
 958     {
 959       c = inf_skip_spaces (' ');
 960       if (c == EOF)
 961         return 0;
 962       if (c != '\n')
 963         break;
 964     }
 965   if (c != '#')
 966     return 0;
 967   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 968   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 969     return 0;
 970
 971   /* So far so good: We've seen an initial #ifndef.  */
 972   *ifndef_line = lineno;
 973   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 974   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 975     return 0;
 976   protect_name = xstrdup (buf.base);
 977
 978   (void) INF_UNGET (c);
 979   c = inf_read_upto (&buf, '\n');
 980   if (c == EOF)
 981     return 0;
 982   lineno++;
 983
 984   for (;;)
 985     {
 986       c = inf_skip_spaces (' ');
 987       if (c == EOF)
 988         return 0;
 989       if (c == '\n')
 990         {
 991           lineno++;
 992           continue;
 993         }
 994       if (c != '#')
 995         goto skip_to_eol;
 996       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 997       if (SSTRING_LENGTH (&buf) == 0)
 998         ;
 999       else if (!strcmp (buf.base, "ifndef")
1000           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1001         {
1002           if_nesting++;
1003         }
1004       else if (!strcmp (buf.base, "endif"))
1005         {
1006           if_nesting--;
1007           if (if_nesting == 0)
1008             break;
1009         }
1010       else if (!strcmp (buf.base, "else"))
1011         {
1012           if (if_nesting == 1)
1013             return 0;
1014         }
1015       else if (!strcmp (buf.base, "define"))
1016         {
1017           c = inf_skip_spaces (c);
1018           c = inf_scan_ident (&buf, c);
1019           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1020             define_seen = 1;
1021         }
1022     skip_to_eol:
1023       for (;;)
1024         {
1025           if (c == '\n' || c == EOF)
1026             break;
1027           c = INF_GET ();
1028         }
1029       if (c == EOF)
1030         return 0;
1031       lineno++;
1032     }
1033
1034   if (!define_seen)
1035      return 0;
1036   *endif_line = lineno;
1037   /* Skip final white space (including comments).  */
1038   for (;;)
1039     {
1040       c = inf_skip_spaces (' ');
1041       if (c == EOF)
1042         break;
1043       if (c != '\n')
1044         return 0;
1045     }
1046
1047   return 1;
1048 }
1049
1050 extern int main (int, char **);
1051
1052 int
1053 main (int argc, char **argv)
1054 {
1055   int inf_fd;
1056   struct stat sbuf;
1057   int c;
1058 #ifdef FIXPROTO_IGNORE_LIST
1059   int i;
1060 #endif
1061   const char *cptr;
1062   int ifndef_line;
1063   int endif_line;
1064   long to_read;
1065   long int inf_size;
1066   struct symbol_list *cur_symbols;
1067
1068   if (argv[0] && argv[0][0])
1069     {
1070       char *p;
1071
1072       progname = 0;
1073       for (p = argv[0]; *p; p++)
1074         if (*p == '/')
1075           progname = p;
1076       progname = progname ? progname+1 : argv[0];
1077     }
1078
1079   if (argc < 4)
1080     {
1081       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1082                progname);
1083       exit (FATAL_EXIT_CODE);
1084     }
1085
1086   inc_filename = argv[1];
1087   inc_filename_length = strlen (inc_filename);
1088
1089 #ifdef FIXPROTO_IGNORE_LIST
1090   for (i = 0; files_to_ignore[i] != NULL; i++)
1091     {
1092       const char *const ignore_name = files_to_ignore[i];
1093       int ignore_len = strlen (ignore_name);
1094       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1095         {
1096           if (ignore_name[ignore_len-1] == '/'
1097               || inc_filename[ignore_len] == '\0')
1098             {
1099               if (verbose)
1100                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1101               exit (SUCCESS_EXIT_CODE);
1102             }
1103         }
1104
1105     }
1106 #endif
1107
1108   if (strcmp (inc_filename, "sys/stat.h") == 0)
1109     special_file_handling = sys_stat_h;
1110   else if (strcmp (inc_filename, "errno.h") == 0)
1111     special_file_handling = errno_h, required_other++;
1112   else if (strcmp (inc_filename, "stdlib.h") == 0)
1113     special_file_handling = stdlib_h, required_other+=2;
1114   else if (strcmp (inc_filename, "stdio.h") == 0)
1115     special_file_handling = stdio_h;
1116   include_entry = std_include_table;
1117   while (include_entry->name != NULL
1118          && ((strcmp (include_entry->name, CONTINUED) == 0)
1119              || strcmp (inc_filename, include_entry->name) != 0))
1120     include_entry++;
1121
1122   if (include_entry->name != NULL)
1123     {
1124       const struct std_include_entry *entry;
1125       cur_symbol_table_size = 0;
1126       for (entry = include_entry; ;)
1127         {
1128           if (entry->flags)
1129             add_symbols (entry->flags, entry->names);
1130           entry++;
1131           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1132             break;
1133         }
1134     }
1135   else
1136     symbol_table[0].names = NULL;
1137
1138   /* Count and mark the prototypes required for this include file.  */
1139   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1140     {
1141       int name_len;
1142       if (cur_symbols->flags & MACRO_SYMBOL)
1143         continue;
1144       cptr = cur_symbols->names;
1145       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1146         {
1147           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1148           required_unseen_count++;
1149           if (fn == NULL)
1150             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1151           else
1152             SET_REQUIRED (fn);
1153         }
1154     }
1155
1156   read_scan_file (argv[2], argc - 4, argv + 4);
1157
1158   inf_fd = open (argv[2], O_RDONLY, 0666);
1159   if (inf_fd < 0)
1160     {
1161       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1162                progname, argv[2]);
1163       perror (NULL);
1164       exit (FATAL_EXIT_CODE);
1165     }
1166   if (fstat (inf_fd, &sbuf) < 0)
1167     {
1168       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1169       perror (NULL);
1170       exit (FATAL_EXIT_CODE);
1171     }
1172   inf_size = sbuf.st_size;
1173   inf_buffer = xmalloc (inf_size + 2);
1174   inf_ptr = inf_buffer;
1175
1176   to_read = inf_size;
1177   while (to_read > 0)
1178     {
1179       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1180       if (i < 0)
1181         {
1182           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1183           perror (NULL);
1184           exit (FATAL_EXIT_CODE);
1185         }
1186       if (i == 0)
1187         {
1188           inf_size -= to_read;
1189           break;
1190         }
1191       to_read -= i;
1192     }
1193
1194   close (inf_fd);
1195
1196   /* Inf_size may have changed if read was short (as on VMS) */
1197   inf_buffer[inf_size] = '\n';
1198   inf_buffer[inf_size + 1] = '\0';
1199   inf_limit = inf_buffer + inf_size;
1200
1201   /* If file doesn't end with '\n', add one.  */
1202   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1203     inf_limit++;
1204
1205   unlink (argv[3]);
1206   outf = fopen (argv[3], "w");
1207   if (outf == NULL)
1208     {
1209       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1210                progname, argv[3]);
1211       perror (NULL);
1212       exit (FATAL_EXIT_CODE);
1213     }
1214
1215   lineno = 1;
1216
1217   if (check_protection (&ifndef_line, &endif_line))
1218     {
1219       lbrac_line = ifndef_line+1;
1220       rbrac_line = endif_line;
1221     }
1222   else
1223     {
1224       lbrac_line = 1;
1225       rbrac_line = -1;
1226     }
1227
1228   /* Reset input file.  */
1229   inf_ptr = inf_buffer;
1230   lineno = 1;
1231
1232   for (;;)
1233     {
1234       if (lineno == lbrac_line)
1235         write_lbrac ();
1236       if (lineno == rbrac_line)
1237         write_rbrac ();
1238       for (;;)
1239         {
1240           struct fn_decl *fn;
1241           c = INF_GET ();
1242           if (c == EOF)
1243             break;
1244           if (ISIDST (c))
1245             {
1246               c = inf_scan_ident (&buf, c);
1247               (void) INF_UNGET (c);
1248               fputs (buf.base, outf);
1249               fn = lookup_std_proto (buf.base, strlen (buf.base));
1250               /* We only want to edit the declaration matching the one
1251                  seen by scan-decls, as there can be multiple
1252                  declarations, selected by #ifdef __STDC__ or whatever.  */
1253               if (fn && fn->partial && fn->partial->line_seen == lineno)
1254                 {
1255                   c = inf_skip_spaces (' ');
1256                   if (c == EOF)
1257                     break;
1258                   if (c == '(')
1259                     {
1260                       c = inf_skip_spaces (' ');
1261                       if (c == ')')
1262                         {
1263                           fprintf (outf, " _PARAMS((%s))", fn->params);
1264                         }
1265                       else
1266                         {
1267                           putc ('(', outf);
1268                           (void) INF_UNGET (c);
1269                         }
1270                     }
1271                   else
1272                     fprintf (outf, " %c", c);
1273                 }
1274             }
1275           else
1276             {
1277               putc (c, outf);
1278               if (c == '\n')
1279                 break;
1280             }
1281         }
1282       if (c == EOF)
1283         break;
1284       lineno++;
1285     }
1286   if (rbrac_line < 0)
1287     write_rbrac ();
1288
1289   fclose (outf);
1290
1291   return 0;
1292 }
1293 \f
1294
1295 static void
1296 v_fatal (const char *str, va_list ap)
1297 {
1298   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1299   vfprintf (stderr, str, ap);
1300   fprintf (stderr, "\n");
1301
1302   exit (FATAL_EXIT_CODE);
1303 }
1304
1305 static void
1306 fatal (const char *str, ...)
1307 {
1308   va_list ap;
1309
1310   va_start (ap, str);
1311   v_fatal (str, ap);
1312   va_end (ap);
1313 }