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 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 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 *const name;
 219   const symbol_flags flags;
 220   const 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 const struct std_include_entry *include_entry;
 229
 230 const 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 struct obstack scan_file_obstack;
 376
 377 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 378
 379 static struct fn_decl *
 380 lookup_std_proto (name, name_length)
 381      const char *name;
 382      int name_length;
 383 {
 384   int i = hashstr (name, name_length) % HASH_SIZE;
 385   int i0 = i;
 386   for (;;)
 387     {
 388       struct fn_decl *fn;
 389       if (hash_tab[i] == 0)
 390         return NULL;
 391       fn = &std_protos[hash_tab[i]];
 392       if ((int) strlen (fn->fname) == name_length
 393           && strncmp (fn->fname, name, name_length) == 0)
 394         return fn;
 395       i = (i+1) % HASH_SIZE;
 396       if (i == i0)
 397         abort ();
 398     }
 399 }
 400
 401 char *inc_filename;
 402 int inc_filename_length;
 403 const char *progname = "fix-header";
 404 FILE *outf;
 405 sstring line;
 406
 407 int lbrac_line, rbrac_line;
 408
 409 int required_unseen_count = 0;
 410 int required_other = 0;
 411
 412 static void
 413 write_lbrac ()
 414 {
 415
 416 #if ADD_MISSING_EXTERN_C
 417   if (missing_extern_C_count + required_unseen_count > 0)
 418     fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 419 #endif
 420
 421   if (partial_count)
 422     {
 423       fprintf (outf, "#ifndef _PARAMS\n");
 424       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 425       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 426       fprintf (outf, "#else\n");
 427       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 428       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 429     }
 430 }
 431
 432 struct partial_proto
 433 {
 434   struct partial_proto *next;
 435   struct fn_decl *fn;
 436   int line_seen;
 437 };
 438
 439 struct partial_proto *partial_proto_list = NULL;
 440
 441 struct partial_proto required_dummy_proto, seen_dummy_proto;
 442 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 443 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 444 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 445 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 446
 447 static void
 448 recognized_macro (fname)
 449      const char *fname;
 450 {
 451   /* The original include file defines fname as a macro.  */
 452   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 453
 454   /* Since fname is a macro, don't require a prototype for it.  */
 455   if (fn)
 456     {
 457       if (REQUIRED (fn))
 458         required_unseen_count--;
 459       SET_SEEN (fn);
 460     }
 461
 462   switch (special_file_handling)
 463     {
 464     case errno_h:
 465       if (strcmp (fname, "errno") == 0 && !seen_errno)
 466         seen_errno = 1, required_other--;
 467       break;
 468     case stdlib_h:
 469       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 470         seen_EXIT_FAILURE = 1, required_other--;
 471       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 472         seen_EXIT_SUCCESS = 1, required_other--;
 473       break;
 474     case sys_stat_h:
 475       if (fname[0] == 'S' && fname[1] == '_')
 476         {
 477           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 478           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 479           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 480           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 481           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 482           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 483           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 484           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 485           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 486           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 487           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 488           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 489         }
 490       break;
 491
 492     default:
 493       break;
 494     }
 495 }
 496
 497 void
 498 recognized_extern (name)
 499      const cpp_token *name;
 500 {
 501   switch (special_file_handling)
 502     {
 503     case errno_h:
 504       if (cpp_ideq (name, "errno"))
 505         seen_errno = 1, required_other--;
 506       break;
 507
 508     default:
 509       break;
 510     }
 511 }
 512
 513 /* Called by scan_decls if it saw a function definition for a function
 514    named FNAME.  KIND is 'I' for an inline function; 'F' if a normal
 515    function declaration preceded by 'extern "C"' (or nested inside
 516    'extern "C"' braces); or 'f' for other function declarations.  */
 517
 518 void
 519 recognized_function (fname, line, kind, have_arg_list)
 520      const cpp_token *fname;
 521      unsigned int line;
 522      int kind; /* One of 'f' 'F' or 'I' */
 523      int have_arg_list;
 524 {
 525   struct partial_proto *partial;
 526   int i;
 527   struct fn_decl *fn;
 528 #if ADD_MISSING_EXTERN_C
 529   if (kind == 'f')
 530     missing_extern_C_count++;
 531 #endif
 532
 533   fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
 534                          NODE_LEN (fname->val.node));
 535
 536   /* Remove the function from the list of required function.  */
 537   if (fn)
 538     {
 539       if (REQUIRED (fn))
 540         required_unseen_count--;
 541       SET_SEEN (fn);
 542     }
 543
 544   /* If we have a full prototype, we're done.  */
 545   if (have_arg_list)
 546     return;
 547
 548   if (kind == 'I')  /* don't edit inline function */
 549     return;
 550
 551   /* If the partial prototype was included from some other file,
 552      we don't need to patch it up (in this run).  */
 553   i = strlen (cur_file);
 554   if (i < inc_filename_length
 555       || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
 556     return;
 557
 558   if (fn == NULL)
 559     return;
 560   if (fn->params[0] == '\0')
 561     return;
 562
 563   /* We only have a partial function declaration,
 564      so remember that we have to add a complete prototype.  */
 565   partial_count++;
 566   partial = (struct partial_proto *)
 567     obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 568   partial->line_seen = line;
 569   partial->fn = fn;
 570   fn->partial = partial;
 571   partial->next = partial_proto_list;
 572   partial_proto_list = partial;
 573   if (verbose)
 574     {
 575       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 576                inc_filename, fn->fname);
 577     }
 578 }
 579
 580 /* For any name in NAMES that is defined as a macro,
 581    call recognized_macro on it.  */
 582
 583 static void
 584 check_macro_names (pfile, names)
 585      cpp_reader *pfile;
 586      namelist names;
 587 {
 588   size_t len;
 589   while (*names)
 590     {
 591       len = strlen (names);
 592       if (cpp_defined (pfile, (const unsigned char *)names, len))
 593         recognized_macro (names);
 594       names += len + 1;
 595     }
 596 }
 597
 598 static void
 599 cb_file_change (pfile, map)
 600      cpp_reader *pfile ATTRIBUTE_UNUSED;
 601      const struct line_map *map;
 602 {
 603   /* Just keep track of current file name.  */
 604   cur_file = map->to_file;
 605 }
 606
 607 static void
 608 read_scan_file (in_fname, argc, argv)
 609      char *in_fname;
 610      int argc;
 611      char **argv;
 612 {
 613   cpp_reader *scan_in;
 614   cpp_callbacks *cb;
 615   cpp_options *options;
 616   struct fn_decl *fn;
 617   int i;
 618   struct symbol_list *cur_symbols;
 619
 620   obstack_init (&scan_file_obstack);
 621
 622   scan_in = cpp_create_reader (CLK_GNUC89);
 623   cb = cpp_get_callbacks (scan_in);
 624   cb->file_change = cb_file_change;
 625
 626   /* We are going to be scanning a header file out of its proper context,
 627      so ignore warnings and errors.  */
 628   options = cpp_get_options (scan_in);
 629   options->inhibit_warnings = 1;
 630   options->inhibit_errors = 1;
 631
 632   i = cpp_handle_options (scan_in, argc, argv);
 633   if (i < argc)
 634     cpp_error (scan_in, DL_ERROR, "invalid option `%s'", argv[i]);
 635   if (cpp_errors (scan_in))
 636     exit (FATAL_EXIT_CODE);
 637
 638   if (! cpp_read_main_file (scan_in, in_fname, NULL))
 639     exit (FATAL_EXIT_CODE);
 640
 641   cpp_finish_options (scan_in);
 642
 643   /* We are scanning a system header, so mark it as such.  */
 644   cpp_make_system_header (scan_in, 1, 0);
 645
 646   scan_decls (scan_in, argc, argv);
 647   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 648     check_macro_names (scan_in, cur_symbols->names);
 649
 650   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 651      If so, those functions are also required.  */
 652   if (special_file_handling == stdio_h
 653       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 654     {
 655       static const unsigned char getchar_call[] = "getchar();";
 656       int seen_filbuf = 0;
 657
 658       /* Scan the macro expansion of "getchar();".  */
 659       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 660                        /* from_stage3 */ true, 1);
 661       for (;;)
 662         {
 663           const cpp_token *t = cpp_get_token (scan_in);
 664
 665           if (t->type == CPP_EOF)
 666             break;
 667           else if (cpp_ideq (t, "_filbuf"))
 668             seen_filbuf++;
 669         }
 670
 671       if (seen_filbuf)
 672         {
 673           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 674           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 675           int need_flsbuf
 676             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 677
 678           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 679           if (need_filbuf + need_flsbuf)
 680             {
 681               const char *new_list;
 682               if (need_filbuf)
 683                 SET_REQUIRED (fn);
 684               if (need_flsbuf)
 685                 SET_REQUIRED (flsbuf_fn);
 686               if (need_flsbuf && need_filbuf)
 687                 new_list = "_filbuf\0_flsbuf\0";
 688               else if (need_flsbuf)
 689                 new_list = "_flsbuf\0";
 690               else /* if (need_flsbuf) */
 691                 new_list = "_filbuf\0";
 692               add_symbols (ANSI_SYMBOL, new_list);
 693               required_unseen_count += need_filbuf + need_flsbuf;
 694             }
 695         }
 696     }
 697
 698   if (required_unseen_count + partial_count + required_other
 699 #if ADD_MISSING_EXTERN_C
 700       + missing_extern_C_count
 701 #endif
 702       == 0)
 703     {
 704       if (verbose)
 705         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 706       exit (SUCCESS_EXIT_CODE);
 707     }
 708   if (!verbose)
 709     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 710   else
 711     {
 712       if (required_unseen_count)
 713         fprintf (stderr, "%s: %d missing function declarations.\n",
 714                  inc_filename, required_unseen_count);
 715       if (partial_count)
 716         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 717                  inc_filename, partial_count);
 718 #if ADD_MISSING_EXTERN_C
 719       if (missing_extern_C_count)
 720         fprintf (stderr,
 721                  "%s: %d declarations not protected by extern \"C\".\n",
 722                  inc_filename, missing_extern_C_count);
 723 #endif
 724     }
 725 }
 726
 727 static void
 728 write_rbrac ()
 729 {
 730   struct fn_decl *fn;
 731   const char *cptr;
 732   struct symbol_list *cur_symbols;
 733
 734   if (required_unseen_count)
 735     {
 736 #ifdef NO_IMPLICIT_EXTERN_C
 737       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 738 #endif
 739     }
 740
 741   /* Now we print out prototypes for those functions that we haven't seen.  */
 742   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 743     {
 744       int if_was_emitted = 0;
 745       int name_len;
 746       cptr = cur_symbols->names;
 747       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 748         {
 749           int macro_protect = 0;
 750
 751           if (cur_symbols->flags & MACRO_SYMBOL)
 752             continue;
 753
 754           fn = lookup_std_proto (cptr, name_len);
 755           if (fn == NULL || !REQUIRED (fn))
 756             continue;
 757
 758           if (!if_was_emitted)
 759             {
 760 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 761               if (cur_symbols->flags & ANSI_SYMBOL)
 762                 fprintf (outf,
 763          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 764               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 765                 fprintf (outf,
 766        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 767     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 768     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 769               else if (cur_symbols->flags & XOPEN_SYMBOL)
 770                 {
 771                 fprintf (outf,
 772        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 773    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 774                 }
 775               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 776                 {
 777                 fprintf (outf,
 778        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 779    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 780                 }
 781               else
 782                 {
 783                   fatal ("internal error for function %s", fn->fname);
 784                 }
 785               if_was_emitted = 1;
 786             }
 787
 788           /* In the case of memmove, protect in case the application
 789              defines it as a macro before including the header.  */
 790           if (!strcmp (fn->fname, "memmove")
 791               || !strcmp (fn->fname, "putc")
 792               || !strcmp (fn->fname, "getc")
 793               || !strcmp (fn->fname, "vprintf")
 794               || !strcmp (fn->fname, "vfprintf")
 795               || !strcmp (fn->fname, "vsprintf")
 796               || !strcmp (fn->fname, "rewinddir")
 797               || !strcmp (fn->fname, "abort"))
 798             macro_protect = 1;
 799
 800           if (macro_protect)
 801             fprintf (outf, "#ifndef %s\n", fn->fname);
 802           fprintf (outf, "extern %s %s (%s);\n",
 803                    fn->rtype, fn->fname, fn->params);
 804           if (macro_protect)
 805             fprintf (outf, "#endif\n");
 806         }
 807       if (if_was_emitted)
 808         fprintf (outf,
 809                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 810     }
 811   if (required_unseen_count)
 812     {
 813 #ifdef NO_IMPLICIT_EXTERN_C
 814       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 815 #endif
 816     }
 817
 818   switch (special_file_handling)
 819     {
 820     case errno_h:
 821       if (!seen_errno)
 822         fprintf (outf, "extern int errno;\n");
 823       break;
 824     case stdlib_h:
 825       if (!seen_EXIT_FAILURE)
 826         fprintf (outf, "#define EXIT_FAILURE 1\n");
 827       if (!seen_EXIT_SUCCESS)
 828         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 829       break;
 830     case sys_stat_h:
 831       if (!seen_S_ISBLK && seen_S_IFBLK)
 832         fprintf (outf,
 833                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 834       if (!seen_S_ISCHR && seen_S_IFCHR)
 835         fprintf (outf,
 836                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 837       if (!seen_S_ISDIR && seen_S_IFDIR)
 838         fprintf (outf,
 839                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 840       if (!seen_S_ISFIFO && seen_S_IFIFO)
 841         fprintf (outf,
 842                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 843       if (!seen_S_ISLNK && seen_S_IFLNK)
 844         fprintf (outf,
 845                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 846       if (!seen_S_ISREG && seen_S_IFREG)
 847         fprintf (outf,
 848                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 849       break;
 850
 851     default:
 852       break;
 853     }
 854
 855
 856 #if ADD_MISSING_EXTERN_C
 857   if (missing_extern_C_count + required_unseen_count > 0)
 858     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 859 #endif
 860 }
 861
 862 /* Returns 1 iff the file is properly protected from multiple inclusion:
 863    #ifndef PROTECT_NAME
 864    #define PROTECT_NAME
 865    #endif
 866
 867  */
 868
 869 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 870 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 871
 872 static int
 873 inf_skip_spaces (c)
 874      int c;
 875 {
 876   for (;;)
 877     {
 878       if (c == ' ' || c == '\t')
 879         c = INF_GET ();
 880       else if (c == '/')
 881         {
 882           c = INF_GET ();
 883           if (c != '*')
 884             {
 885               (void) INF_UNGET (c);
 886               return '/';
 887             }
 888           c = INF_GET ();
 889           for (;;)
 890             {
 891               if (c == EOF)
 892                 return EOF;
 893               else if (c != '*')
 894                 {
 895                   if (c == '\n')
 896                     source_lineno++, lineno++;
 897                   c = INF_GET ();
 898                 }
 899               else if ((c = INF_GET ()) == '/')
 900                 return INF_GET ();
 901             }
 902         }
 903       else
 904         break;
 905     }
 906   return c;
 907 }
 908
 909 /* Read into STR from inf_buffer upto DELIM.  */
 910
 911 static int
 912 inf_read_upto (str, delim)
 913      sstring *str;
 914      int delim;
 915 {
 916   int ch;
 917   for (;;)
 918     {
 919       ch = INF_GET ();
 920       if (ch == EOF || ch == delim)
 921         break;
 922       SSTRING_PUT (str, ch);
 923     }
 924   MAKE_SSTRING_SPACE (str, 1);
 925   *str->ptr = 0;
 926   return ch;
 927 }
 928
 929 static int
 930 inf_scan_ident (s, c)
 931      sstring *s;
 932      int c;
 933 {
 934   s->ptr = s->base;
 935   if (ISIDST (c))
 936     {
 937       for (;;)
 938         {
 939           SSTRING_PUT (s, c);
 940           c = INF_GET ();
 941           if (c == EOF || !(ISIDNUM (c)))
 942             break;
 943         }
 944     }
 945   MAKE_SSTRING_SPACE (s, 1);
 946   *s->ptr = 0;
 947   return c;
 948 }
 949
 950 /* Returns 1 if the file is correctly protected against multiple
 951    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 952    and setting *endif_line to the final #endif.
 953    Otherwise return 0.  */
 954
 955 static int
 956 check_protection (ifndef_line, endif_line)
 957      int *ifndef_line, *endif_line;
 958 {
 959   int c;
 960   int if_nesting = 1; /* Level of nesting of #if's */
 961   char *protect_name = NULL; /* Identifier following initial #ifndef */
 962   int define_seen = 0;
 963
 964   /* Skip initial white space (including comments).  */
 965   for (;; lineno++)
 966     {
 967       c = inf_skip_spaces (' ');
 968       if (c == EOF)
 969         return 0;
 970       if (c != '\n')
 971         break;
 972     }
 973   if (c != '#')
 974     return 0;
 975   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 976   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 977     return 0;
 978
 979   /* So far so good: We've seen an initial #ifndef.  */
 980   *ifndef_line = lineno;
 981   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 982   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 983     return 0;
 984   protect_name = xstrdup (buf.base);
 985
 986   (void) INF_UNGET (c);
 987   c = inf_read_upto (&buf, '\n');
 988   if (c == EOF)
 989     return 0;
 990   lineno++;
 991
 992   for (;;)
 993     {
 994       c = inf_skip_spaces (' ');
 995       if (c == EOF)
 996         return 0;
 997       if (c == '\n')
 998         {
 999           lineno++;
1000           continue;
1001         }
1002       if (c != '#')
1003         goto skip_to_eol;
1004       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1005       if (SSTRING_LENGTH (&buf) == 0)
1006         ;
1007       else if (!strcmp (buf.base, "ifndef")
1008           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1009         {
1010           if_nesting++;
1011         }
1012       else if (!strcmp (buf.base, "endif"))
1013         {
1014           if_nesting--;
1015           if (if_nesting == 0)
1016             break;
1017         }
1018       else if (!strcmp (buf.base, "else"))
1019         {
1020           if (if_nesting == 1)
1021             return 0;
1022         }
1023       else if (!strcmp (buf.base, "define"))
1024         {
1025           c = inf_skip_spaces (c);
1026           c = inf_scan_ident (&buf, c);
1027           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1028             define_seen = 1;
1029         }
1030     skip_to_eol:
1031       for (;;)
1032         {
1033           if (c == '\n' || c == EOF)
1034             break;
1035           c = INF_GET ();
1036         }
1037       if (c == EOF)
1038         return 0;
1039       lineno++;
1040     }
1041
1042   if (!define_seen)
1043      return 0;
1044   *endif_line = lineno;
1045   /* Skip final white space (including comments).  */
1046   for (;;)
1047     {
1048       c = inf_skip_spaces (' ');
1049       if (c == EOF)
1050         break;
1051       if (c != '\n')
1052         return 0;
1053     }
1054
1055   return 1;
1056 }
1057
1058 extern int main                 PARAMS ((int, char **));
1059
1060 int
1061 main (argc, argv)
1062      int argc;
1063      char **argv;
1064 {
1065   int inf_fd;
1066   struct stat sbuf;
1067   int c;
1068 #ifdef FIXPROTO_IGNORE_LIST
1069   int i;
1070 #endif
1071   const char *cptr;
1072   int ifndef_line;
1073   int endif_line;
1074   long to_read;
1075   long int inf_size;
1076   struct symbol_list *cur_symbols;
1077
1078   if (argv[0] && argv[0][0])
1079     {
1080       char *p;
1081
1082       progname = 0;
1083       for (p = argv[0]; *p; p++)
1084         if (*p == '/')
1085           progname = p;
1086       progname = progname ? progname+1 : argv[0];
1087     }
1088
1089   if (argc < 4)
1090     {
1091       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1092                progname);
1093       exit (FATAL_EXIT_CODE);
1094     }
1095
1096   inc_filename = argv[1];
1097   inc_filename_length = strlen (inc_filename);
1098
1099 #ifdef FIXPROTO_IGNORE_LIST
1100   for (i = 0; files_to_ignore[i] != NULL; i++)
1101     {
1102       const char *const ignore_name = files_to_ignore[i];
1103       int ignore_len = strlen (ignore_name);
1104       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1105         {
1106           if (ignore_name[ignore_len-1] == '/'
1107               || inc_filename[ignore_len] == '\0')
1108             {
1109               if (verbose)
1110                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1111               exit (SUCCESS_EXIT_CODE);
1112             }
1113         }
1114
1115     }
1116 #endif
1117
1118   if (strcmp (inc_filename, "sys/stat.h") == 0)
1119     special_file_handling = sys_stat_h;
1120   else if (strcmp (inc_filename, "errno.h") == 0)
1121     special_file_handling = errno_h, required_other++;
1122   else if (strcmp (inc_filename, "stdlib.h") == 0)
1123     special_file_handling = stdlib_h, required_other+=2;
1124   else if (strcmp (inc_filename, "stdio.h") == 0)
1125     special_file_handling = stdio_h;
1126   include_entry = std_include_table;
1127   while (include_entry->name != NULL
1128          && ((strcmp (include_entry->name, CONTINUED) == 0)
1129              || strcmp (inc_filename, include_entry->name) != 0))
1130     include_entry++;
1131
1132   if (include_entry->name != NULL)
1133     {
1134       const struct std_include_entry *entry;
1135       cur_symbol_table_size = 0;
1136       for (entry = include_entry; ;)
1137         {
1138           if (entry->flags)
1139             add_symbols (entry->flags, entry->names);
1140           entry++;
1141           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1142             break;
1143         }
1144     }
1145   else
1146     symbol_table[0].names = NULL;
1147
1148   /* Count and mark the prototypes required for this include file.  */
1149   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1150     {
1151       int name_len;
1152       if (cur_symbols->flags & MACRO_SYMBOL)
1153         continue;
1154       cptr = cur_symbols->names;
1155       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1156         {
1157           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1158           required_unseen_count++;
1159           if (fn == NULL)
1160             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1161           else
1162             SET_REQUIRED (fn);
1163         }
1164     }
1165
1166   read_scan_file (argv[2], argc - 4, argv + 4);
1167
1168   inf_fd = open (argv[2], O_RDONLY, 0666);
1169   if (inf_fd < 0)
1170     {
1171       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1172                progname, argv[2]);
1173       perror (NULL);
1174       exit (FATAL_EXIT_CODE);
1175     }
1176   if (fstat (inf_fd, &sbuf) < 0)
1177     {
1178       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1179       perror (NULL);
1180       exit (FATAL_EXIT_CODE);
1181     }
1182   inf_size = sbuf.st_size;
1183   inf_buffer = (char *) xmalloc (inf_size + 2);
1184   inf_ptr = inf_buffer;
1185
1186   to_read = inf_size;
1187   while (to_read > 0)
1188     {
1189       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1190       if (i < 0)
1191         {
1192           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1193           perror (NULL);
1194           exit (FATAL_EXIT_CODE);
1195         }
1196       if (i == 0)
1197         {
1198           inf_size -= to_read;
1199           break;
1200         }
1201       to_read -= i;
1202     }
1203
1204   close (inf_fd);
1205
1206   /* Inf_size may have changed if read was short (as on VMS) */
1207   inf_buffer[inf_size] = '\n';
1208   inf_buffer[inf_size + 1] = '\0';
1209   inf_limit = inf_buffer + inf_size;
1210
1211   /* If file doesn't end with '\n', add one.  */
1212   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1213     inf_limit++;
1214
1215   unlink (argv[3]);
1216   outf = fopen (argv[3], "w");
1217   if (outf == NULL)
1218     {
1219       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1220                progname, argv[3]);
1221       perror (NULL);
1222       exit (FATAL_EXIT_CODE);
1223     }
1224
1225   lineno = 1;
1226
1227   if (check_protection (&ifndef_line, &endif_line))
1228     {
1229       lbrac_line = ifndef_line+1;
1230       rbrac_line = endif_line;
1231     }
1232   else
1233     {
1234       lbrac_line = 1;
1235       rbrac_line = -1;
1236     }
1237
1238   /* Reset input file.  */
1239   inf_ptr = inf_buffer;
1240   lineno = 1;
1241
1242   for (;;)
1243     {
1244       if (lineno == lbrac_line)
1245         write_lbrac ();
1246       if (lineno == rbrac_line)
1247         write_rbrac ();
1248       for (;;)
1249         {
1250           struct fn_decl *fn;
1251           c = INF_GET ();
1252           if (c == EOF)
1253             break;
1254           if (ISIDST (c))
1255             {
1256               c = inf_scan_ident (&buf, c);
1257               (void) INF_UNGET (c);
1258               fputs (buf.base, outf);
1259               fn = lookup_std_proto (buf.base, strlen (buf.base));
1260               /* We only want to edit the declaration matching the one
1261                  seen by scan-decls, as there can be multiple
1262                  declarations, selected by #ifdef __STDC__ or whatever.  */
1263               if (fn && fn->partial && fn->partial->line_seen == lineno)
1264                 {
1265                   c = inf_skip_spaces (' ');
1266                   if (c == EOF)
1267                     break;
1268                   if (c == '(')
1269                     {
1270                       c = inf_skip_spaces (' ');
1271                       if (c == ')')
1272                         {
1273                           fprintf (outf, " _PARAMS((%s))", fn->params);
1274                         }
1275                       else
1276                         {
1277                           putc ('(', outf);
1278                           (void) INF_UNGET (c);
1279                         }
1280                     }
1281                   else
1282                     fprintf (outf, " %c", c);
1283                 }
1284             }
1285           else
1286             {
1287               putc (c, outf);
1288               if (c == '\n')
1289                 break;
1290             }
1291         }
1292       if (c == EOF)
1293         break;
1294       lineno++;
1295     }
1296   if (rbrac_line < 0)
1297     write_rbrac ();
1298
1299   fclose (outf);
1300
1301   return 0;
1302 }
1303 \f
1304
1305 static void
1306 v_fatal (str, ap)
1307   const char * str;
1308   va_list ap;
1309 {
1310   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1311   vfprintf (stderr, str, ap);
1312   fprintf (stderr, "\n");
1313
1314   exit (FATAL_EXIT_CODE);
1315 }
1316
1317 static void
1318 fatal VPARAMS ((const char *str, ...))
1319 {
1320   VA_OPEN (ap, str);
1321   VA_FIXEDARG (ap, const char *, str);
1322
1323   v_fatal (str, ap);
1324   VA_CLOSE (ap);
1325 }