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 "hconfig.h"
  75 #include "system.h"
  76 #include "obstack.h"
  77 #include "scan.h"
  78 #include "cpplib.h"
  79
  80 static void v_fatal PARAMS ((const char *, va_list)) ATTRIBUTE_PRINTF (1,0) ATTRIBUTE_NORETURN;
  81 static void fatal PARAMS ((const char *, ...)) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  82
  83 sstring buf;
  84
  85 int verbose = 0;
  86 int partial_count = 0;
  87 int warnings = 0;
  88
  89 /* We no longer need to add extern "C", because cpp implicitly
  90    forces the standard include files to be treated as C.  */
  91 /*#define ADD_MISSING_EXTERN_C 1 */
  92
  93 #if ADD_MISSING_EXTERN_C
  94 int missing_extern_C_count = 0;
  95 #endif
  96
  97 #include "xsys-protos.h"
  98
  99 #ifdef FIXPROTO_IGNORE_LIST
 100 /* This is a currently unused feature.  */
 101
 102 /* List of files and directories to ignore.
 103    A directory name (ending in '/') means ignore anything in that
 104    directory.  (It might be more efficient to do directory pruning
 105    earlier in fixproto, but this is simpler and easier to customize.) */
 106
 107 static char *files_to_ignore[] = {
 108   "X11/",
 109   FIXPROTO_IGNORE_LIST
 110   0
 111 };
 112 #endif
 113
 114 char *inf_buffer;
 115 char *inf_limit;
 116 char *inf_ptr;
 117 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 PARAMS ((symbol_flags, namelist));
 192 static struct fn_decl *lookup_std_proto PARAMS ((const char *, int));
 193 static void write_lbrac PARAMS ((void));
 194 static void recognized_macro PARAMS ((const char *));
 195 static void check_macro_names PARAMS ((cpp_reader *, namelist));
 196 static void read_scan_file PARAMS ((char *, int, char **));
 197 static void write_rbrac PARAMS ((void));
 198 static int inf_skip_spaces PARAMS ((int));
 199 static int inf_read_upto PARAMS ((sstring *, int));
 200 static int inf_scan_ident PARAMS ((sstring *, int));
 201 static int check_protection PARAMS ((int *, int *));
 202 static void cb_file_change PARAMS ((cpp_reader *, const struct line_map *));
 203
 204 static void
 205 add_symbols (flags, names)
 206      symbol_flags flags;
 207      namelist names;
 208 {
 209   symbol_table[cur_symbol_table_size].flags = flags;
 210   symbol_table[cur_symbol_table_size].names = names;
 211   cur_symbol_table_size++;
 212   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 213     fatal ("too many calls to add_symbols");
 214   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 215 }
 216
 217 struct std_include_entry {
 218   const char *name;
 219   symbol_flags flags;
 220   namelist names;
 221 };
 222
 223 const char NONE[] = "";  /* The empty namelist.  */
 224
 225 /* Special name to indicate a continuation line in std_include_table.  */
 226 const char CONTINUED[] = "";
 227
 228 struct std_include_entry *include_entry;
 229
 230 struct std_include_entry std_include_table [] = {
 231   { "ctype.h", ANSI_SYMBOL,
 232       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 233 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 234
 235   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 236
 237   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 238
 239   /* ANSI_SYMBOL is wrong, but ...  */
 240   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 241 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 242 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 243 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 244 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 245
 246   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 247
 248   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 249   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 250
 251 /*{ "limit.h", ... provided by gcc }, */
 252
 253   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 254
 255   { "math.h", ANSI_SYMBOL,
 256       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 257 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 258 tan\0tanh\0" },
 259
 260   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 261
 262   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 263
 264   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 265   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 266
 267   /* Left out signal() - its prototype is too complex for us!
 268      Also left out "sigaction sigaddset sigdelset sigemptyset
 269      sigfillset sigismember sigpending sigprocmask sigsuspend"
 270      because these need sigset_t or struct sigaction.
 271      Most systems that provide them will also declare them.  */
 272   { "signal.h", ANSI_SYMBOL, "kill\0raise\0" },
 273
 274   { "stdio.h", ANSI_SYMBOL,
 275       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 276 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 277 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 278 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 279 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 280 tmpnam\0ungetc\0" },
 281   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 282   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 283 /* Should perhaps also handle NULL, EOF, ... ? */
 284
 285   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 286      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 287      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 288      Should perhaps also add NULL */
 289   { "stdlib.h", ANSI_SYMBOL,
 290       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 291 exit\0free\0getenv\0labs\0malloc\0putenv\0qsort\0rand\0realloc\0\
 292 srand\0strtod\0strtol\0strtoul\0system\0" },
 293   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 294
 295   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 296 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 297 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 298 strtok\0strxfrm\0" },
 299 /* Should perhaps also add NULL and size_t */
 300
 301   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 302       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 303
 304   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 305
 306   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 307      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 308      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 309   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 310
 311   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 312
 313   { "sys/stat.h", POSIX1_SYMBOL,
 314       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 315   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 316       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 317 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 318   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 319
 320 #if 0
 321 /* How do we handle fd_set? */
 322   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 323   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 324 #endif
 325
 326   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 327   /* "sys/types.h" add types (not in old g++-include) */
 328
 329   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 330
 331   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 332   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 333       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 334 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 335
 336   { "tar.h", POSIX1_SYMBOL, NONE },
 337
 338   { "termios.h", POSIX1_SYMBOL,
 339       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 340
 341   { "time.h", ANSI_SYMBOL,
 342       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0tzset\0" },
 343
 344   { "unistd.h", POSIX1_SYMBOL,
 345       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 346 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 347 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 348 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 349 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 350 ttyname\0unlink\0write\0" },
 351   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 352   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 353       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 354
 355   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 356
 357   { NULL, 0, NONE }
 358 };
 359
 360 enum special_file special_file_handling = no_special;
 361
 362 /* They are set if the corresponding macro has been seen.  */
 363 /* The following are only used when handling sys/stat.h */
 364 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 365 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 366 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 367 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 368 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 369 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 370 /* The following are only used when handling errno.h */
 371 int seen_errno = 0;
 372 /* The following are only used when handling stdlib.h */
 373 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 374 \f
 375 #define obstack_chunk_alloc xmalloc
 376 #define obstack_chunk_free free
 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 && ! CPP_FATAL_ERRORS (scan_in))
 636     cpp_fatal (scan_in, "Invalid option `%s'", argv[i]);
 637   cpp_post_options (scan_in);
 638   if (CPP_FATAL_ERRORS (scan_in))
 639     exit (FATAL_EXIT_CODE);
 640
 641   if (! cpp_read_main_file (scan_in, in_fname, NULL))
 642     exit (FATAL_EXIT_CODE);
 643
 644   cpp_finish_options (scan_in);
 645
 646   /* We are scanning a system header, so mark it as such.  */
 647   cpp_make_system_header (scan_in, 1, 0);
 648
 649   scan_decls (scan_in, argc, argv);
 650   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 651     check_macro_names (scan_in, cur_symbols->names);
 652
 653   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 654      If so, those functions are also required.  */
 655   if (special_file_handling == stdio_h
 656       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 657     {
 658       static const unsigned char getchar_call[] = "getchar();";
 659       int seen_filbuf = 0;
 660
 661       /* Scan the macro expansion of "getchar();".  */
 662       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 663                        /* from_stage3 */ true, 1);
 664       for (;;)
 665         {
 666           const cpp_token *t = cpp_get_token (scan_in);
 667
 668           if (t->type == CPP_EOF)
 669             break;
 670           else if (cpp_ideq (t, "_filbuf"))
 671             seen_filbuf++;
 672         }
 673
 674       if (seen_filbuf)
 675         {
 676           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 677           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 678           int need_flsbuf
 679             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 680
 681           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 682           if (need_filbuf + need_flsbuf)
 683             {
 684               const char *new_list;
 685               if (need_filbuf)
 686                 SET_REQUIRED (fn);
 687               if (need_flsbuf)
 688                 SET_REQUIRED (flsbuf_fn);
 689               if (need_flsbuf && need_filbuf)
 690                 new_list = "_filbuf\0_flsbuf\0";
 691               else if (need_flsbuf)
 692                 new_list = "_flsbuf\0";
 693               else /* if (need_flsbuf) */
 694                 new_list = "_filbuf\0";
 695               add_symbols (ANSI_SYMBOL, new_list);
 696               required_unseen_count += need_filbuf + need_flsbuf;
 697             }
 698         }
 699     }
 700
 701   if (required_unseen_count + partial_count + required_other
 702 #if ADD_MISSING_EXTERN_C
 703       + missing_extern_C_count
 704 #endif
 705       == 0)
 706     {
 707       if (verbose)
 708         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 709       exit (SUCCESS_EXIT_CODE);
 710     }
 711   if (!verbose)
 712     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 713   else
 714     {
 715       if (required_unseen_count)
 716         fprintf (stderr, "%s: %d missing function declarations.\n",
 717                  inc_filename, required_unseen_count);
 718       if (partial_count)
 719         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 720                  inc_filename, partial_count);
 721 #if ADD_MISSING_EXTERN_C
 722       if (missing_extern_C_count)
 723         fprintf (stderr,
 724                  "%s: %d declarations not protected by extern \"C\".\n",
 725                  inc_filename, missing_extern_C_count);
 726 #endif
 727     }
 728 }
 729
 730 static void
 731 write_rbrac ()
 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 #if ADD_MISSING_EXTERN_C
 860   if (missing_extern_C_count + required_unseen_count > 0)
 861     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 862 #endif
 863 }
 864
 865 /* Returns 1 iff the file is properly protected from multiple inclusion:
 866    #ifndef PROTECT_NAME
 867    #define PROTECT_NAME
 868    #endif
 869
 870  */
 871
 872 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 873 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 874
 875 static int
 876 inf_skip_spaces (c)
 877      int c;
 878 {
 879   for (;;)
 880     {
 881       if (c == ' ' || c == '\t')
 882         c = INF_GET ();
 883       else if (c == '/')
 884         {
 885           c = INF_GET ();
 886           if (c != '*')
 887             {
 888               (void) INF_UNGET (c);
 889               return '/';
 890             }
 891           c = INF_GET ();
 892           for (;;)
 893             {
 894               if (c == EOF)
 895                 return EOF;
 896               else if (c != '*')
 897                 {
 898                   if (c == '\n')
 899                     source_lineno++, lineno++;
 900                   c = INF_GET ();
 901                 }
 902               else if ((c = INF_GET ()) == '/')
 903                 return INF_GET ();
 904             }
 905         }
 906       else
 907         break;
 908     }
 909   return c;
 910 }
 911
 912 /* Read into STR from inf_buffer upto DELIM.  */
 913
 914 static int
 915 inf_read_upto (str, delim)
 916      sstring *str;
 917      int delim;
 918 {
 919   int ch;
 920   for (;;)
 921     {
 922       ch = INF_GET ();
 923       if (ch == EOF || ch == delim)
 924         break;
 925       SSTRING_PUT (str, ch);
 926     }
 927   MAKE_SSTRING_SPACE (str, 1);
 928   *str->ptr = 0;
 929   return ch;
 930 }
 931
 932 static int
 933 inf_scan_ident (s, c)
 934      sstring *s;
 935      int c;
 936 {
 937   s->ptr = s->base;
 938   if (ISIDST (c))
 939     {
 940       for (;;)
 941         {
 942           SSTRING_PUT (s, c);
 943           c = INF_GET ();
 944           if (c == EOF || !(ISIDNUM (c)))
 945             break;
 946         }
 947     }
 948   MAKE_SSTRING_SPACE (s, 1);
 949   *s->ptr = 0;
 950   return c;
 951 }
 952
 953 /* Returns 1 if the file is correctly protected against multiple
 954    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 955    and setting *endif_line to the final #endif.
 956    Otherwise return 0.  */
 957
 958 static int
 959 check_protection (ifndef_line, endif_line)
 960      int *ifndef_line, *endif_line;
 961 {
 962   int c;
 963   int if_nesting = 1; /* Level of nesting of #if's */
 964   char *protect_name = NULL; /* Identifier following initial #ifndef */
 965   int define_seen = 0;
 966
 967   /* Skip initial white space (including comments).  */
 968   for (;; lineno++)
 969     {
 970       c = inf_skip_spaces (' ');
 971       if (c == EOF)
 972         return 0;
 973       if (c != '\n')
 974         break;
 975     }
 976   if (c != '#')
 977     return 0;
 978   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 979   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 980     return 0;
 981
 982   /* So far so good: We've seen an initial #ifndef.  */
 983   *ifndef_line = lineno;
 984   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 985   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 986     return 0;
 987   protect_name = xstrdup (buf.base);
 988
 989   (void) INF_UNGET (c);
 990   c = inf_read_upto (&buf, '\n');
 991   if (c == EOF)
 992     return 0;
 993   lineno++;
 994
 995   for (;;)
 996     {
 997       c = inf_skip_spaces (' ');
 998       if (c == EOF)
 999         return 0;
1000       if (c == '\n')
1001         {
1002           lineno++;
1003           continue;
1004         }
1005       if (c != '#')
1006         goto skip_to_eol;
1007       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1008       if (SSTRING_LENGTH (&buf) == 0)
1009         ;
1010       else if (!strcmp (buf.base, "ifndef")
1011           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1012         {
1013           if_nesting++;
1014         }
1015       else if (!strcmp (buf.base, "endif"))
1016         {
1017           if_nesting--;
1018           if (if_nesting == 0)
1019             break;
1020         }
1021       else if (!strcmp (buf.base, "else"))
1022         {
1023           if (if_nesting == 1)
1024             return 0;
1025         }
1026       else if (!strcmp (buf.base, "define"))
1027         {
1028           c = inf_skip_spaces (c);
1029           c = inf_scan_ident (&buf, c);
1030           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1031             define_seen = 1;
1032         }
1033     skip_to_eol:
1034       for (;;)
1035         {
1036           if (c == '\n' || c == EOF)
1037             break;
1038           c = INF_GET ();
1039         }
1040       if (c == EOF)
1041         return 0;
1042       lineno++;
1043     }
1044
1045   if (!define_seen)
1046      return 0;
1047   *endif_line = lineno;
1048   /* Skip final white space (including comments).  */
1049   for (;;)
1050     {
1051       c = inf_skip_spaces (' ');
1052       if (c == EOF)
1053         break;
1054       if (c != '\n')
1055         return 0;
1056     }
1057
1058   return 1;
1059 }
1060
1061 extern int main                 PARAMS ((int, char **));
1062
1063 int
1064 main (argc, argv)
1065      int argc;
1066      char **argv;
1067 {
1068   int inf_fd;
1069   struct stat sbuf;
1070   int c;
1071 #ifdef FIXPROTO_IGNORE_LIST
1072   int i;
1073 #endif
1074   const char *cptr;
1075   int ifndef_line;
1076   int endif_line;
1077   long to_read;
1078   long int inf_size;
1079   struct symbol_list *cur_symbols;
1080
1081   if (argv[0] && argv[0][0])
1082     {
1083       char *p;
1084
1085       progname = 0;
1086       for (p = argv[0]; *p; p++)
1087         if (*p == '/')
1088           progname = p;
1089       progname = progname ? progname+1 : argv[0];
1090     }
1091
1092   if (argc < 4)
1093     {
1094       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1095                progname);
1096       exit (FATAL_EXIT_CODE);
1097     }
1098
1099   inc_filename = argv[1];
1100   inc_filename_length = strlen (inc_filename);
1101
1102 #ifdef FIXPROTO_IGNORE_LIST
1103   for (i = 0; files_to_ignore[i] != NULL; i++)
1104     {
1105       char *ignore_name = files_to_ignore[i];
1106       int ignore_len = strlen (ignore_name);
1107       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1108         {
1109           if (ignore_name[ignore_len-1] == '/'
1110               || inc_filename[ignore_len] == '\0')
1111             {
1112               if (verbose)
1113                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1114               exit (SUCCESS_EXIT_CODE);
1115             }
1116         }
1117
1118     }
1119 #endif
1120
1121   if (strcmp (inc_filename, "sys/stat.h") == 0)
1122     special_file_handling = sys_stat_h;
1123   else if (strcmp (inc_filename, "errno.h") == 0)
1124     special_file_handling = errno_h, required_other++;
1125   else if (strcmp (inc_filename, "stdlib.h") == 0)
1126     special_file_handling = stdlib_h, required_other+=2;
1127   else if (strcmp (inc_filename, "stdio.h") == 0)
1128     special_file_handling = stdio_h;
1129   include_entry = std_include_table;
1130   while (include_entry->name != NULL
1131          && ((strcmp (include_entry->name, CONTINUED) == 0)
1132              || strcmp (inc_filename, include_entry->name) != 0))
1133     include_entry++;
1134
1135   if (include_entry->name != NULL)
1136     {
1137       struct std_include_entry *entry;
1138       cur_symbol_table_size = 0;
1139       for (entry = include_entry; ;)
1140         {
1141           if (entry->flags)
1142             add_symbols (entry->flags, entry->names);
1143           entry++;
1144           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1145             break;
1146         }
1147     }
1148   else
1149     symbol_table[0].names = NULL;
1150
1151   /* Count and mark the prototypes required for this include file.  */
1152   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1153     {
1154       int name_len;
1155       if (cur_symbols->flags & MACRO_SYMBOL)
1156         continue;
1157       cptr = cur_symbols->names;
1158       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1159         {
1160           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1161           required_unseen_count++;
1162           if (fn == NULL)
1163             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1164           else
1165             SET_REQUIRED (fn);
1166         }
1167     }
1168
1169   read_scan_file (argv[2], argc - 4, argv + 4);
1170
1171   inf_fd = open (argv[2], O_RDONLY, 0666);
1172   if (inf_fd < 0)
1173     {
1174       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1175                progname, argv[2]);
1176       perror (NULL);
1177       exit (FATAL_EXIT_CODE);
1178     }
1179   if (fstat (inf_fd, &sbuf) < 0)
1180     {
1181       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1182       perror (NULL);
1183       exit (FATAL_EXIT_CODE);
1184     }
1185   inf_size = sbuf.st_size;
1186   inf_buffer = (char *) xmalloc (inf_size + 2);
1187   inf_buffer[inf_size] = '\n';
1188   inf_buffer[inf_size + 1] = '\0';
1189   inf_limit = inf_buffer + inf_size;
1190   inf_ptr = inf_buffer;
1191
1192   to_read = inf_size;
1193   while (to_read > 0)
1194     {
1195       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1196       if (i < 0)
1197         {
1198           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1199           perror (NULL);
1200           exit (FATAL_EXIT_CODE);
1201         }
1202       if (i == 0)
1203         {
1204           inf_size -= to_read;
1205           break;
1206         }
1207       to_read -= i;
1208     }
1209
1210   close (inf_fd);
1211
1212   /* If file doesn't end with '\n', add one.  */
1213   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1214     inf_limit++;
1215
1216   unlink (argv[3]);
1217   outf = fopen (argv[3], "w");
1218   if (outf == NULL)
1219     {
1220       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1221                progname, argv[3]);
1222       perror (NULL);
1223       exit (FATAL_EXIT_CODE);
1224     }
1225
1226   lineno = 1;
1227
1228   if (check_protection (&ifndef_line, &endif_line))
1229     {
1230       lbrac_line = ifndef_line+1;
1231       rbrac_line = endif_line;
1232     }
1233   else
1234     {
1235       lbrac_line = 1;
1236       rbrac_line = -1;
1237     }
1238
1239   /* Reset input file.  */
1240   inf_ptr = inf_buffer;
1241   lineno = 1;
1242
1243   for (;;)
1244     {
1245       if (lineno == lbrac_line)
1246         write_lbrac ();
1247       if (lineno == rbrac_line)
1248         write_rbrac ();
1249       for (;;)
1250         {
1251           struct fn_decl *fn;
1252           c = INF_GET ();
1253           if (c == EOF)
1254             break;
1255           if (ISIDST (c))
1256             {
1257               c = inf_scan_ident (&buf, c);
1258               (void) INF_UNGET (c);
1259               fputs (buf.base, outf);
1260               fn = lookup_std_proto (buf.base, strlen (buf.base));
1261               /* We only want to edit the declaration matching the one
1262                  seen by scan-decls, as there can be multiple
1263                  declarations, selected by #ifdef __STDC__ or whatever.  */
1264               if (fn && fn->partial && fn->partial->line_seen == lineno)
1265                 {
1266                   c = inf_skip_spaces (' ');
1267                   if (c == EOF)
1268                     break;
1269                   if (c == '(')
1270                     {
1271                       c = inf_skip_spaces (' ');
1272                       if (c == ')')
1273                         {
1274                           fprintf (outf, " _PARAMS((%s))", fn->params);
1275                         }
1276                       else
1277                         {
1278                           putc ('(', outf);
1279                           (void) INF_UNGET (c);
1280                         }
1281                     }
1282                   else
1283                     fprintf (outf, " %c", c);
1284                 }
1285             }
1286           else
1287             {
1288               putc (c, outf);
1289               if (c == '\n')
1290                 break;
1291             }
1292         }
1293       if (c == EOF)
1294         break;
1295       lineno++;
1296     }
1297   if (rbrac_line < 0)
1298     write_rbrac ();
1299
1300   fclose (outf);
1301
1302   return 0;
1303 }
1304 \f
1305
1306 static void
1307 v_fatal (str, ap)
1308   const char * str;
1309   va_list ap;
1310 {
1311   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1312   vfprintf (stderr, str, ap);
1313   fprintf (stderr, "\n");
1314
1315   exit (FATAL_EXIT_CODE);
1316 }
1317
1318 static void
1319 fatal VPARAMS ((const char *str, ...))
1320 {
1321   VA_OPEN (ap, str);
1322   VA_FIXEDARG (ap, const char *, str);
1323
1324   v_fatal (str, ap);
1325   VA_CLOSE (ap);
1326 }