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 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 are such 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
  82 static void v_fatal PARAMS ((const char *, va_list)) ATTRIBUTE_PRINTF (1,0) ATTRIBUTE_NORETURN;
  83 static void fatal PARAMS ((const char *, ...)) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  84
  85 sstring buf;
  86
  87 int verbose = 0;
  88 int partial_count = 0;
  89 int warnings = 0;
  90
  91 /* We no longer need to add extern "C", because cpp implicitly
  92    forces the standard include files to be treated as C.  */
  93 /*#define ADD_MISSING_EXTERN_C 1 */
  94
  95 #if ADD_MISSING_EXTERN_C
  96 int missing_extern_C_count = 0;
  97 #endif
  98
  99 #include "xsys-protos.h"
 100
 101 #ifdef FIXPROTO_IGNORE_LIST
 102 /* This is a currently unused feature.  */
 103
 104 /* List of files and directories to ignore.
 105    A directory name (ending in '/') means ignore anything in that
 106    directory.  (It might be more efficient to do directory pruning
 107    earlier in fixproto, but this is simpler and easier to customize.) */
 108
 109 static const char *const files_to_ignore[] = {
 110   "X11/",
 111   FIXPROTO_IGNORE_LIST
 112   0
 113 };
 114 #endif
 115
 116 char *inf_buffer;
 117 char *inf_limit;
 118 char *inf_ptr;
 119 static const char *cur_file;
 120
 121 /* Certain standard files get extra treatment */
 122
 123 enum special_file
 124 {
 125   no_special,
 126 #ifdef errno_h
 127 #undef errno_h
 128 #endif
 129   errno_h,
 130 #ifdef stdio_h
 131 #undef stdio_h
 132 #endif
 133   stdio_h,
 134 #ifdef stdlib_h
 135 #undef stdlib_h
 136 #endif
 137   stdlib_h,
 138 #ifdef sys_stat_h
 139 #undef sys_stat_h
 140 #endif
 141   sys_stat_h
 142 };
 143
 144 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 145    by an empty name (i.e. by "\0\0").  */
 146
 147 typedef const char *namelist;
 148
 149 /* The following macros provide the bits for symbol_flags.  */
 150 typedef int symbol_flags;
 151
 152 /* Used to mark names defined in the ANSI/ISO C standard.  */
 153 #define ANSI_SYMBOL 1
 154
 155 /* We no longer massage include files for POSIX or XOPEN symbols,
 156    as there are now several versions of the POSIX and XOPEN standards,
 157    and it would be a maintenance nightmare for us to track them all.
 158    Better to be compatible with the system include files.  */
 159 /*#define ADD_MISSING_POSIX 1 */
 160 /*#define ADD_MISSING_XOPEN 1 */
 161
 162 #if ADD_MISSING_POSIX
 163 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 164 #define POSIX1_SYMBOL 2
 165 #define POSIX2_SYMBOL 4
 166 #else
 167 #define POSIX1_SYMBOL 0
 168 #define POSIX2_SYMBOL 0
 169 #endif
 170
 171 #if ADD_MISSING_XOPEN
 172 /* Used to mark names defined in X/Open Portability Guide.  */
 173 #define XOPEN_SYMBOL 8
 174 /* Used to mark names defined in X/Open UNIX Extensions.  */
 175 #define XOPEN_EXTENDED_SYMBOL 16
 176 #else
 177 #define XOPEN_SYMBOL 0
 178 #define XOPEN_EXTENDED_SYMBOL 0
 179 #endif
 180
 181 /* Used to indicate names that are not functions */
 182 #define MACRO_SYMBOL 512
 183
 184 struct symbol_list {
 185   symbol_flags flags;
 186   namelist names;
 187 };
 188
 189 #define SYMBOL_TABLE_SIZE 10
 190 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 191 int cur_symbol_table_size;
 192
 193 static void add_symbols PARAMS ((symbol_flags, namelist));
 194 static struct fn_decl *lookup_std_proto PARAMS ((const char *, int));
 195 static void write_lbrac PARAMS ((void));
 196 static void recognized_macro PARAMS ((const char *));
 197 static void check_macro_names PARAMS ((cpp_reader *, namelist));
 198 static void read_scan_file PARAMS ((char *, int, char **));
 199 static void write_rbrac PARAMS ((void));
 200 static int inf_skip_spaces PARAMS ((int));
 201 static int inf_read_upto PARAMS ((sstring *, int));
 202 static int inf_scan_ident PARAMS ((sstring *, int));
 203 static int check_protection PARAMS ((int *, int *));
 204 static void cb_file_change PARAMS ((cpp_reader *, const struct line_map *));
 205
 206 static void
 207 add_symbols (flags, names)
 208      symbol_flags flags;
 209      namelist names;
 210 {
 211   symbol_table[cur_symbol_table_size].flags = flags;
 212   symbol_table[cur_symbol_table_size].names = names;
 213   cur_symbol_table_size++;
 214   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 215     fatal ("too many calls to add_symbols");
 216   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 217 }
 218
 219 struct std_include_entry {
 220   const char *const name;
 221   const symbol_flags flags;
 222   const namelist names;
 223 };
 224
 225 const char NONE[] = "";  /* The empty namelist.  */
 226
 227 /* Special name to indicate a continuation line in std_include_table.  */
 228 const char CONTINUED[] = "";
 229
 230 const struct std_include_entry *include_entry;
 231
 232 const struct std_include_entry std_include_table [] = {
 233   { "ctype.h", ANSI_SYMBOL,
 234       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 235 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 236
 237   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 238
 239   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 240
 241   /* ANSI_SYMBOL is wrong, but ...  */
 242   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 243 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 244 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 245 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 246 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 247
 248   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 249
 250   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 251   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 252
 253 /*{ "limit.h", ... provided by gcc }, */
 254
 255   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 256
 257   { "math.h", ANSI_SYMBOL,
 258       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 259 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 260 tan\0tanh\0" },
 261
 262   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 263
 264   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 265
 266   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 267   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 268
 269   /* Left out signal() - its prototype is too complex for us!
 270      Also left out "sigaction sigaddset sigdelset sigemptyset
 271      sigfillset sigismember sigpending sigprocmask sigsuspend"
 272      because these need sigset_t or struct sigaction.
 273      Most systems that provide them will also declare them.  */
 274   { "signal.h", ANSI_SYMBOL, "kill\0raise\0" },
 275
 276   { "stdio.h", ANSI_SYMBOL,
 277       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 278 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 279 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 280 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 281 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 282 tmpnam\0ungetc\0" },
 283   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 284   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 285 /* Should perhaps also handle NULL, EOF, ... ? */
 286
 287   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 288      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 289      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 290      Should perhaps also add NULL */
 291   { "stdlib.h", ANSI_SYMBOL,
 292       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 293 exit\0free\0getenv\0labs\0malloc\0putenv\0qsort\0rand\0realloc\0\
 294 srand\0strtod\0strtol\0strtoul\0system\0" },
 295   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 296
 297   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 298 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 299 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 300 strtok\0strxfrm\0" },
 301 /* Should perhaps also add NULL and size_t */
 302
 303   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 304       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 305
 306   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 307
 308   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 309      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 310      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 311   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 312
 313   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 314
 315   { "sys/stat.h", POSIX1_SYMBOL,
 316       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 317   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 318       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 319 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 320   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 321
 322 #if 0
 323 /* How do we handle fd_set? */
 324   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 325   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 326 #endif
 327
 328   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 329   /* "sys/types.h" add types (not in old g++-include) */
 330
 331   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 332
 333   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 334   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 335       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 336 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 337
 338   { "tar.h", POSIX1_SYMBOL, NONE },
 339
 340   { "termios.h", POSIX1_SYMBOL,
 341       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 342
 343   { "time.h", ANSI_SYMBOL,
 344       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0tzset\0" },
 345
 346   { "unistd.h", POSIX1_SYMBOL,
 347       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 348 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 349 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 350 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 351 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 352 ttyname\0unlink\0write\0" },
 353   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 354   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 355       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 356
 357   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 358
 359   { NULL, 0, NONE }
 360 };
 361
 362 enum special_file special_file_handling = no_special;
 363
 364 /* They are set if the corresponding macro has been seen.  */
 365 /* The following are only used when handling sys/stat.h */
 366 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 367 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 368 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 369 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 370 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 371 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 372 /* The following are only used when handling errno.h */
 373 int seen_errno = 0;
 374 /* The following are only used when handling stdlib.h */
 375 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 376 \f
 377 struct obstack scan_file_obstack;
 378
 379 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 380
 381 static struct fn_decl *
 382 lookup_std_proto (name, name_length)
 383      const char *name;
 384      int name_length;
 385 {
 386   int i = hashstr (name, name_length) % HASH_SIZE;
 387   int i0 = i;
 388   for (;;)
 389     {
 390       struct fn_decl *fn;
 391       if (hash_tab[i] == 0)
 392         return NULL;
 393       fn = &std_protos[hash_tab[i]];
 394       if ((int) strlen (fn->fname) == name_length
 395           && strncmp (fn->fname, name, name_length) == 0)
 396         return fn;
 397       i = (i+1) % HASH_SIZE;
 398       if (i == i0)
 399         abort ();
 400     }
 401 }
 402
 403 char *inc_filename;
 404 int inc_filename_length;
 405 const char *progname = "fix-header";
 406 FILE *outf;
 407 sstring line;
 408
 409 int lbrac_line, rbrac_line;
 410
 411 int required_unseen_count = 0;
 412 int required_other = 0;
 413
 414 static void
 415 write_lbrac ()
 416 {
 417
 418 #if ADD_MISSING_EXTERN_C
 419   if (missing_extern_C_count + required_unseen_count > 0)
 420     fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 421 #endif
 422
 423   if (partial_count)
 424     {
 425       fprintf (outf, "#ifndef _PARAMS\n");
 426       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 427       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 428       fprintf (outf, "#else\n");
 429       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 430       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 431     }
 432 }
 433
 434 struct partial_proto
 435 {
 436   struct partial_proto *next;
 437   struct fn_decl *fn;
 438   int line_seen;
 439 };
 440
 441 struct partial_proto *partial_proto_list = NULL;
 442
 443 struct partial_proto required_dummy_proto, seen_dummy_proto;
 444 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 445 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 446 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 447 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 448
 449 static void
 450 recognized_macro (fname)
 451      const char *fname;
 452 {
 453   /* The original include file defines fname as a macro.  */
 454   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 455
 456   /* Since fname is a macro, don't require a prototype for it.  */
 457   if (fn)
 458     {
 459       if (REQUIRED (fn))
 460         required_unseen_count--;
 461       SET_SEEN (fn);
 462     }
 463
 464   switch (special_file_handling)
 465     {
 466     case errno_h:
 467       if (strcmp (fname, "errno") == 0 && !seen_errno)
 468         seen_errno = 1, required_other--;
 469       break;
 470     case stdlib_h:
 471       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 472         seen_EXIT_FAILURE = 1, required_other--;
 473       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 474         seen_EXIT_SUCCESS = 1, required_other--;
 475       break;
 476     case sys_stat_h:
 477       if (fname[0] == 'S' && fname[1] == '_')
 478         {
 479           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 480           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 481           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 482           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 483           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 484           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 485           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 486           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 487           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 488           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 489           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 490           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 491         }
 492       break;
 493
 494     default:
 495       break;
 496     }
 497 }
 498
 499 void
 500 recognized_extern (name)
 501      const cpp_token *name;
 502 {
 503   switch (special_file_handling)
 504     {
 505     case errno_h:
 506       if (cpp_ideq (name, "errno"))
 507         seen_errno = 1, required_other--;
 508       break;
 509
 510     default:
 511       break;
 512     }
 513 }
 514
 515 /* Called by scan_decls if it saw a function definition for a function
 516    named FNAME.  KIND is 'I' for an inline function; 'F' if a normal
 517    function declaration preceded by 'extern "C"' (or nested inside
 518    'extern "C"' braces); or 'f' for other function declarations.  */
 519
 520 void
 521 recognized_function (fname, line, kind, have_arg_list)
 522      const cpp_token *fname;
 523      unsigned int line;
 524      int kind; /* One of 'f' 'F' or 'I' */
 525      int have_arg_list;
 526 {
 527   struct partial_proto *partial;
 528   int i;
 529   struct fn_decl *fn;
 530 #if ADD_MISSING_EXTERN_C
 531   if (kind == 'f')
 532     missing_extern_C_count++;
 533 #endif
 534
 535   fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
 536                          NODE_LEN (fname->val.node));
 537
 538   /* Remove the function from the list of required function.  */
 539   if (fn)
 540     {
 541       if (REQUIRED (fn))
 542         required_unseen_count--;
 543       SET_SEEN (fn);
 544     }
 545
 546   /* If we have a full prototype, we're done.  */
 547   if (have_arg_list)
 548     return;
 549
 550   if (kind == 'I')  /* don't edit inline function */
 551     return;
 552
 553   /* If the partial prototype was included from some other file,
 554      we don't need to patch it up (in this run).  */
 555   i = strlen (cur_file);
 556   if (i < inc_filename_length
 557       || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
 558     return;
 559
 560   if (fn == NULL)
 561     return;
 562   if (fn->params[0] == '\0')
 563     return;
 564
 565   /* We only have a partial function declaration,
 566      so remember that we have to add a complete prototype.  */
 567   partial_count++;
 568   partial = (struct partial_proto *)
 569     obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 570   partial->line_seen = line;
 571   partial->fn = fn;
 572   fn->partial = partial;
 573   partial->next = partial_proto_list;
 574   partial_proto_list = partial;
 575   if (verbose)
 576     {
 577       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 578                inc_filename, fn->fname);
 579     }
 580 }
 581
 582 /* For any name in NAMES that is defined as a macro,
 583    call recognized_macro on it.  */
 584
 585 static void
 586 check_macro_names (pfile, names)
 587      cpp_reader *pfile;
 588      namelist names;
 589 {
 590   size_t len;
 591   while (*names)
 592     {
 593       len = strlen (names);
 594       if (cpp_defined (pfile, (const unsigned char *)names, len))
 595         recognized_macro (names);
 596       names += len + 1;
 597     }
 598 }
 599
 600 static void
 601 cb_file_change (pfile, map)
 602      cpp_reader *pfile ATTRIBUTE_UNUSED;
 603      const struct line_map *map;
 604 {
 605   /* Just keep track of current file name.  */
 606   cur_file = map->to_file;
 607 }
 608
 609 static void
 610 read_scan_file (in_fname, argc, argv)
 611      char *in_fname;
 612      int argc;
 613      char **argv;
 614 {
 615   cpp_reader *scan_in;
 616   cpp_callbacks *cb;
 617   cpp_options *options;
 618   struct fn_decl *fn;
 619   int i;
 620   struct symbol_list *cur_symbols;
 621
 622   obstack_init (&scan_file_obstack);
 623
 624   scan_in = cpp_create_reader (CLK_GNUC89);
 625   cb = cpp_get_callbacks (scan_in);
 626   cb->file_change = cb_file_change;
 627
 628   /* We are going to be scanning a header file out of its proper context,
 629      so ignore warnings and errors.  */
 630   options = cpp_get_options (scan_in);
 631   options->inhibit_warnings = 1;
 632   options->inhibit_errors = 1;
 633
 634   i = cpp_handle_options (scan_in, argc, argv);
 635   if (i < argc)
 636     cpp_error (scan_in, DL_ERROR, "invalid option `%s'", argv[i]);
 637   if (cpp_errors (scan_in))
 638     exit (FATAL_EXIT_CODE);
 639
 640   if (! cpp_read_main_file (scan_in, in_fname, NULL))
 641     exit (FATAL_EXIT_CODE);
 642
 643   cpp_finish_options (scan_in);
 644
 645   /* We are scanning a system header, so mark it as such.  */
 646   cpp_make_system_header (scan_in, 1, 0);
 647
 648   scan_decls (scan_in, argc, argv);
 649   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 650     check_macro_names (scan_in, cur_symbols->names);
 651
 652   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 653      If so, those functions are also required.  */
 654   if (special_file_handling == stdio_h
 655       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 656     {
 657       static const unsigned char getchar_call[] = "getchar();";
 658       int seen_filbuf = 0;
 659
 660       /* Scan the macro expansion of "getchar();".  */
 661       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 662                        /* from_stage3 */ true, 1);
 663       for (;;)
 664         {
 665           const cpp_token *t = cpp_get_token (scan_in);
 666
 667           if (t->type == CPP_EOF)
 668             break;
 669           else if (cpp_ideq (t, "_filbuf"))
 670             seen_filbuf++;
 671         }
 672
 673       if (seen_filbuf)
 674         {
 675           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 676           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 677           int need_flsbuf
 678             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 679
 680           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 681           if (need_filbuf + need_flsbuf)
 682             {
 683               const char *new_list;
 684               if (need_filbuf)
 685                 SET_REQUIRED (fn);
 686               if (need_flsbuf)
 687                 SET_REQUIRED (flsbuf_fn);
 688               if (need_flsbuf && need_filbuf)
 689                 new_list = "_filbuf\0_flsbuf\0";
 690               else if (need_flsbuf)
 691                 new_list = "_flsbuf\0";
 692               else /* if (need_flsbuf) */
 693                 new_list = "_filbuf\0";
 694               add_symbols (ANSI_SYMBOL, new_list);
 695               required_unseen_count += need_filbuf + need_flsbuf;
 696             }
 697         }
 698     }
 699
 700   if (required_unseen_count + partial_count + required_other
 701 #if ADD_MISSING_EXTERN_C
 702       + missing_extern_C_count
 703 #endif
 704       == 0)
 705     {
 706       if (verbose)
 707         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 708       exit (SUCCESS_EXIT_CODE);
 709     }
 710   if (!verbose)
 711     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 712   else
 713     {
 714       if (required_unseen_count)
 715         fprintf (stderr, "%s: %d missing function declarations.\n",
 716                  inc_filename, required_unseen_count);
 717       if (partial_count)
 718         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 719                  inc_filename, partial_count);
 720 #if ADD_MISSING_EXTERN_C
 721       if (missing_extern_C_count)
 722         fprintf (stderr,
 723                  "%s: %d declarations not protected by extern \"C\".\n",
 724                  inc_filename, missing_extern_C_count);
 725 #endif
 726     }
 727 }
 728
 729 static void
 730 write_rbrac ()
 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 #if ADD_MISSING_EXTERN_C
 859   if (missing_extern_C_count + required_unseen_count > 0)
 860     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 861 #endif
 862 }
 863
 864 /* Returns 1 iff the file is properly protected from multiple inclusion:
 865    #ifndef PROTECT_NAME
 866    #define PROTECT_NAME
 867    #endif
 868
 869  */
 870
 871 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 872 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 873
 874 static int
 875 inf_skip_spaces (c)
 876      int c;
 877 {
 878   for (;;)
 879     {
 880       if (c == ' ' || c == '\t')
 881         c = INF_GET ();
 882       else if (c == '/')
 883         {
 884           c = INF_GET ();
 885           if (c != '*')
 886             {
 887               (void) INF_UNGET (c);
 888               return '/';
 889             }
 890           c = INF_GET ();
 891           for (;;)
 892             {
 893               if (c == EOF)
 894                 return EOF;
 895               else if (c != '*')
 896                 {
 897                   if (c == '\n')
 898                     source_lineno++, lineno++;
 899                   c = INF_GET ();
 900                 }
 901               else if ((c = INF_GET ()) == '/')
 902                 return INF_GET ();
 903             }
 904         }
 905       else
 906         break;
 907     }
 908   return c;
 909 }
 910
 911 /* Read into STR from inf_buffer upto DELIM.  */
 912
 913 static int
 914 inf_read_upto (str, delim)
 915      sstring *str;
 916      int delim;
 917 {
 918   int ch;
 919   for (;;)
 920     {
 921       ch = INF_GET ();
 922       if (ch == EOF || ch == delim)
 923         break;
 924       SSTRING_PUT (str, ch);
 925     }
 926   MAKE_SSTRING_SPACE (str, 1);
 927   *str->ptr = 0;
 928   return ch;
 929 }
 930
 931 static int
 932 inf_scan_ident (s, c)
 933      sstring *s;
 934      int c;
 935 {
 936   s->ptr = s->base;
 937   if (ISIDST (c))
 938     {
 939       for (;;)
 940         {
 941           SSTRING_PUT (s, c);
 942           c = INF_GET ();
 943           if (c == EOF || !(ISIDNUM (c)))
 944             break;
 945         }
 946     }
 947   MAKE_SSTRING_SPACE (s, 1);
 948   *s->ptr = 0;
 949   return c;
 950 }
 951
 952 /* Returns 1 if the file is correctly protected against multiple
 953    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 954    and setting *endif_line to the final #endif.
 955    Otherwise return 0.  */
 956
 957 static int
 958 check_protection (ifndef_line, endif_line)
 959      int *ifndef_line, *endif_line;
 960 {
 961   int c;
 962   int if_nesting = 1; /* Level of nesting of #if's */
 963   char *protect_name = NULL; /* Identifier following initial #ifndef */
 964   int define_seen = 0;
 965
 966   /* Skip initial white space (including comments).  */
 967   for (;; lineno++)
 968     {
 969       c = inf_skip_spaces (' ');
 970       if (c == EOF)
 971         return 0;
 972       if (c != '\n')
 973         break;
 974     }
 975   if (c != '#')
 976     return 0;
 977   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 978   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 979     return 0;
 980
 981   /* So far so good: We've seen an initial #ifndef.  */
 982   *ifndef_line = lineno;
 983   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 984   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 985     return 0;
 986   protect_name = xstrdup (buf.base);
 987
 988   (void) INF_UNGET (c);
 989   c = inf_read_upto (&buf, '\n');
 990   if (c == EOF)
 991     return 0;
 992   lineno++;
 993
 994   for (;;)
 995     {
 996       c = inf_skip_spaces (' ');
 997       if (c == EOF)
 998         return 0;
 999       if (c == '\n')
1000         {
1001           lineno++;
1002           continue;
1003         }
1004       if (c != '#')
1005         goto skip_to_eol;
1006       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1007       if (SSTRING_LENGTH (&buf) == 0)
1008         ;
1009       else if (!strcmp (buf.base, "ifndef")
1010           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1011         {
1012           if_nesting++;
1013         }
1014       else if (!strcmp (buf.base, "endif"))
1015         {
1016           if_nesting--;
1017           if (if_nesting == 0)
1018             break;
1019         }
1020       else if (!strcmp (buf.base, "else"))
1021         {
1022           if (if_nesting == 1)
1023             return 0;
1024         }
1025       else if (!strcmp (buf.base, "define"))
1026         {
1027           c = inf_skip_spaces (c);
1028           c = inf_scan_ident (&buf, c);
1029           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1030             define_seen = 1;
1031         }
1032     skip_to_eol:
1033       for (;;)
1034         {
1035           if (c == '\n' || c == EOF)
1036             break;
1037           c = INF_GET ();
1038         }
1039       if (c == EOF)
1040         return 0;
1041       lineno++;
1042     }
1043
1044   if (!define_seen)
1045      return 0;
1046   *endif_line = lineno;
1047   /* Skip final white space (including comments).  */
1048   for (;;)
1049     {
1050       c = inf_skip_spaces (' ');
1051       if (c == EOF)
1052         break;
1053       if (c != '\n')
1054         return 0;
1055     }
1056
1057   return 1;
1058 }
1059
1060 extern int main                 PARAMS ((int, char **));
1061
1062 int
1063 main (argc, argv)
1064      int argc;
1065      char **argv;
1066 {
1067   int inf_fd;
1068   struct stat sbuf;
1069   int c;
1070 #ifdef FIXPROTO_IGNORE_LIST
1071   int i;
1072 #endif
1073   const char *cptr;
1074   int ifndef_line;
1075   int endif_line;
1076   long to_read;
1077   long int inf_size;
1078   struct symbol_list *cur_symbols;
1079
1080   if (argv[0] && argv[0][0])
1081     {
1082       char *p;
1083
1084       progname = 0;
1085       for (p = argv[0]; *p; p++)
1086         if (*p == '/')
1087           progname = p;
1088       progname = progname ? progname+1 : argv[0];
1089     }
1090
1091   if (argc < 4)
1092     {
1093       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1094                progname);
1095       exit (FATAL_EXIT_CODE);
1096     }
1097
1098   inc_filename = argv[1];
1099   inc_filename_length = strlen (inc_filename);
1100
1101 #ifdef FIXPROTO_IGNORE_LIST
1102   for (i = 0; files_to_ignore[i] != NULL; i++)
1103     {
1104       const char *const ignore_name = files_to_ignore[i];
1105       int ignore_len = strlen (ignore_name);
1106       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1107         {
1108           if (ignore_name[ignore_len-1] == '/'
1109               || inc_filename[ignore_len] == '\0')
1110             {
1111               if (verbose)
1112                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1113               exit (SUCCESS_EXIT_CODE);
1114             }
1115         }
1116
1117     }
1118 #endif
1119
1120   if (strcmp (inc_filename, "sys/stat.h") == 0)
1121     special_file_handling = sys_stat_h;
1122   else if (strcmp (inc_filename, "errno.h") == 0)
1123     special_file_handling = errno_h, required_other++;
1124   else if (strcmp (inc_filename, "stdlib.h") == 0)
1125     special_file_handling = stdlib_h, required_other+=2;
1126   else if (strcmp (inc_filename, "stdio.h") == 0)
1127     special_file_handling = stdio_h;
1128   include_entry = std_include_table;
1129   while (include_entry->name != NULL
1130          && ((strcmp (include_entry->name, CONTINUED) == 0)
1131              || strcmp (inc_filename, include_entry->name) != 0))
1132     include_entry++;
1133
1134   if (include_entry->name != NULL)
1135     {
1136       const struct std_include_entry *entry;
1137       cur_symbol_table_size = 0;
1138       for (entry = include_entry; ;)
1139         {
1140           if (entry->flags)
1141             add_symbols (entry->flags, entry->names);
1142           entry++;
1143           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1144             break;
1145         }
1146     }
1147   else
1148     symbol_table[0].names = NULL;
1149
1150   /* Count and mark the prototypes required for this include file.  */
1151   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1152     {
1153       int name_len;
1154       if (cur_symbols->flags & MACRO_SYMBOL)
1155         continue;
1156       cptr = cur_symbols->names;
1157       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1158         {
1159           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1160           required_unseen_count++;
1161           if (fn == NULL)
1162             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1163           else
1164             SET_REQUIRED (fn);
1165         }
1166     }
1167
1168   read_scan_file (argv[2], argc - 4, argv + 4);
1169
1170   inf_fd = open (argv[2], O_RDONLY, 0666);
1171   if (inf_fd < 0)
1172     {
1173       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1174                progname, argv[2]);
1175       perror (NULL);
1176       exit (FATAL_EXIT_CODE);
1177     }
1178   if (fstat (inf_fd, &sbuf) < 0)
1179     {
1180       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1181       perror (NULL);
1182       exit (FATAL_EXIT_CODE);
1183     }
1184   inf_size = sbuf.st_size;
1185   inf_buffer = (char *) xmalloc (inf_size + 2);
1186   inf_ptr = inf_buffer;
1187
1188   to_read = inf_size;
1189   while (to_read > 0)
1190     {
1191       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1192       if (i < 0)
1193         {
1194           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1195           perror (NULL);
1196           exit (FATAL_EXIT_CODE);
1197         }
1198       if (i == 0)
1199         {
1200           inf_size -= to_read;
1201           break;
1202         }
1203       to_read -= i;
1204     }
1205
1206   close (inf_fd);
1207
1208   /* Inf_size may have changed if read was short (as on VMS) */
1209   inf_buffer[inf_size] = '\n';
1210   inf_buffer[inf_size + 1] = '\0';
1211   inf_limit = inf_buffer + inf_size;
1212
1213   /* If file doesn't end with '\n', add one.  */
1214   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1215     inf_limit++;
1216
1217   unlink (argv[3]);
1218   outf = fopen (argv[3], "w");
1219   if (outf == NULL)
1220     {
1221       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1222                progname, argv[3]);
1223       perror (NULL);
1224       exit (FATAL_EXIT_CODE);
1225     }
1226
1227   lineno = 1;
1228
1229   if (check_protection (&ifndef_line, &endif_line))
1230     {
1231       lbrac_line = ifndef_line+1;
1232       rbrac_line = endif_line;
1233     }
1234   else
1235     {
1236       lbrac_line = 1;
1237       rbrac_line = -1;
1238     }
1239
1240   /* Reset input file.  */
1241   inf_ptr = inf_buffer;
1242   lineno = 1;
1243
1244   for (;;)
1245     {
1246       if (lineno == lbrac_line)
1247         write_lbrac ();
1248       if (lineno == rbrac_line)
1249         write_rbrac ();
1250       for (;;)
1251         {
1252           struct fn_decl *fn;
1253           c = INF_GET ();
1254           if (c == EOF)
1255             break;
1256           if (ISIDST (c))
1257             {
1258               c = inf_scan_ident (&buf, c);
1259               (void) INF_UNGET (c);
1260               fputs (buf.base, outf);
1261               fn = lookup_std_proto (buf.base, strlen (buf.base));
1262               /* We only want to edit the declaration matching the one
1263                  seen by scan-decls, as there can be multiple
1264                  declarations, selected by #ifdef __STDC__ or whatever.  */
1265               if (fn && fn->partial && fn->partial->line_seen == lineno)
1266                 {
1267                   c = inf_skip_spaces (' ');
1268                   if (c == EOF)
1269                     break;
1270                   if (c == '(')
1271                     {
1272                       c = inf_skip_spaces (' ');
1273                       if (c == ')')
1274                         {
1275                           fprintf (outf, " _PARAMS((%s))", fn->params);
1276                         }
1277                       else
1278                         {
1279                           putc ('(', outf);
1280                           (void) INF_UNGET (c);
1281                         }
1282                     }
1283                   else
1284                     fprintf (outf, " %c", c);
1285                 }
1286             }
1287           else
1288             {
1289               putc (c, outf);
1290               if (c == '\n')
1291                 break;
1292             }
1293         }
1294       if (c == EOF)
1295         break;
1296       lineno++;
1297     }
1298   if (rbrac_line < 0)
1299     write_rbrac ();
1300
1301   fclose (outf);
1302
1303   return 0;
1304 }
1305 \f
1306
1307 static void
1308 v_fatal (str, ap)
1309   const char * str;
1310   va_list ap;
1311 {
1312   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1313   vfprintf (stderr, str, ap);
1314   fprintf (stderr, "\n");
1315
1316   exit (FATAL_EXIT_CODE);
1317 }
1318
1319 static void
1320 fatal VPARAMS ((const char *str, ...))
1321 {
1322   VA_OPEN (ap, str);
1323   VA_FIXEDARG (ap, const char *, str);
1324
1325   v_fatal (str, ap);
1326   VA_CLOSE (ap);
1327 }