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 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_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
 118 /* Certain standard files get extra treatment */
 119
 120 enum special_file
 121 {
 122   no_special,
 123 #ifdef errno_h
 124 #undef errno_h
 125 #endif
 126   errno_h,
 127 #ifdef stdio_h
 128 #undef stdio_h
 129 #endif
 130   stdio_h,
 131 #ifdef stdlib_h
 132 #undef stdlib_h
 133 #endif
 134   stdlib_h,
 135 #ifdef sys_stat_h
 136 #undef sys_stat_h
 137 #endif
 138   sys_stat_h
 139 };
 140
 141 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 142    by an empty name (i.e. by "\0\0").  */
 143
 144 typedef const char *namelist;
 145
 146 /* The following macros provide the bits for symbol_flags.  */
 147 typedef int symbol_flags;
 148
 149 /* Used to mark names defined in the ANSI/ISO C standard.  */
 150 #define ANSI_SYMBOL 1
 151
 152 /* We no longer massage include files for POSIX or XOPEN symbols,
 153    as there are now several versions of the POSIX and XOPEN standards,
 154    and it would be a maintenance nightmare for us to track them all.
 155    Better to be compatible with the system include files.  */
 156 /*#define ADD_MISSING_POSIX 1 */
 157 /*#define ADD_MISSING_XOPEN 1 */
 158
 159 #if ADD_MISSING_POSIX
 160 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 161 #define POSIX1_SYMBOL 2
 162 #define POSIX2_SYMBOL 4
 163 #else
 164 #define POSIX1_SYMBOL 0
 165 #define POSIX2_SYMBOL 0
 166 #endif
 167
 168 #if ADD_MISSING_XOPEN
 169 /* Used to mark names defined in X/Open Portability Guide.  */
 170 #define XOPEN_SYMBOL 8
 171 /* Used to mark names defined in X/Open UNIX Extensions.  */
 172 #define XOPEN_EXTENDED_SYMBOL 16
 173 #else
 174 #define XOPEN_SYMBOL 0
 175 #define XOPEN_EXTENDED_SYMBOL 0
 176 #endif
 177
 178 /* Used to indicate names that are not functions */
 179 #define MACRO_SYMBOL 512
 180
 181 struct symbol_list {
 182   symbol_flags flags;
 183   namelist names;
 184 };
 185
 186 #define SYMBOL_TABLE_SIZE 10
 187 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 188 int cur_symbol_table_size;
 189
 190 static void add_symbols PARAMS ((symbol_flags, namelist));
 191 static struct fn_decl *lookup_std_proto PARAMS ((const char *, int));
 192 static void write_lbrac PARAMS ((void));
 193 static void recognized_macro PARAMS ((const char *));
 194 static void check_macro_names PARAMS ((cpp_reader *, namelist));
 195 static void read_scan_file PARAMS ((char *, int, char **));
 196 static void write_rbrac PARAMS ((void));
 197 static int inf_skip_spaces PARAMS ((int));
 198 static int inf_read_upto PARAMS ((sstring *, int));
 199 static int inf_scan_ident PARAMS ((sstring *, int));
 200 static int check_protection PARAMS ((int *, int *));
 201
 202 static void
 203 add_symbols (flags, names)
 204      symbol_flags flags;
 205      namelist names;
 206 {
 207   symbol_table[cur_symbol_table_size].flags = flags;
 208   symbol_table[cur_symbol_table_size].names = names;
 209   cur_symbol_table_size++;
 210   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 211     fatal ("too many calls to add_symbols");
 212   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 213 }
 214
 215 struct std_include_entry {
 216   const char *name;
 217   symbol_flags flags;
 218   namelist names;
 219 };
 220
 221 const char NONE[] = "";  /* The empty namelist.  */
 222
 223 /* Special name to indicate a continuation line in std_include_table.  */
 224 const char CONTINUED[] = "";
 225
 226 struct std_include_entry *include_entry;
 227
 228 struct std_include_entry std_include_table [] = {
 229   { "ctype.h", ANSI_SYMBOL,
 230       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 231 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 232
 233   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 234
 235   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 236
 237   /* ANSI_SYMBOL is wrong, but ...  */
 238   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 239 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 240 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 241 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 242 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 243
 244   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 245
 246   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 247   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 248
 249 /*{ "limit.h", ... provided by gcc }, */
 250
 251   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 252
 253   { "math.h", ANSI_SYMBOL,
 254       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 255 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 256 tan\0tanh\0" },
 257
 258   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 259
 260   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 261
 262   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 263   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 264
 265   /* Left out signal() - its prototype is too complex for us!
 266      Also left out "sigaction sigaddset sigdelset sigemptyset
 267      sigfillset sigismember sigpending sigprocmask sigsuspend"
 268      because these need sigset_t or struct sigaction.
 269      Most systems that provide them will also declare them.  */
 270   { "signal.h", ANSI_SYMBOL, "kill\0raise\0" },
 271
 272   { "stdio.h", ANSI_SYMBOL,
 273       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 274 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 275 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 276 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 277 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 278 tmpnam\0ungetc\0" },
 279   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 280   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 281 /* Should perhaps also handle NULL, EOF, ... ? */
 282
 283   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 284      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 285      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 286      Should perhaps also add NULL */
 287   { "stdlib.h", ANSI_SYMBOL,
 288       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 289 exit\0free\0getenv\0labs\0malloc\0putenv\0qsort\0rand\0realloc\0\
 290 srand\0strtod\0strtol\0strtoul\0system\0" },
 291   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 292
 293   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 294 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 295 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 296 strtok\0strxfrm\0" },
 297 /* Should perhaps also add NULL and size_t */
 298
 299   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 300       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 301
 302   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 303
 304   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 305      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 306      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 307   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 308
 309   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 310
 311   { "sys/stat.h", POSIX1_SYMBOL,
 312       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 313   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 314       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 315 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 316   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 317
 318 #if 0
 319 /* How do we handle fd_set? */
 320   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 321   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 322 #endif
 323
 324   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 325   /* "sys/types.h" add types (not in old g++-include) */
 326
 327   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 328
 329   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 330   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 331       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 332 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 333
 334   { "tar.h", POSIX1_SYMBOL, NONE },
 335
 336   { "termios.h", POSIX1_SYMBOL,
 337       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 338
 339   { "time.h", ANSI_SYMBOL,
 340       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0tzset\0" },
 341
 342   { "unistd.h", POSIX1_SYMBOL,
 343       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 344 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 345 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 346 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 347 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 348 ttyname\0unlink\0write\0" },
 349   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 350   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 351       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 352
 353   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 354
 355   { NULL, 0, NONE }
 356 };
 357
 358 enum special_file special_file_handling = no_special;
 359
 360 /* They are set if the corresponding macro has been seen.  */
 361 /* The following are only used when handling sys/stat.h */
 362 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 363 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 364 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 365 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 366 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 367 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 368 /* The following are only used when handling errno.h */
 369 int seen_errno = 0;
 370 /* The following are only used when handling stdlib.h */
 371 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 372 \f
 373 #define obstack_chunk_alloc xmalloc
 374 #define obstack_chunk_free free
 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_idcmp (name->val.name.text, name->val.name.len, "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, in source file FILE_SEEN on line LINE_SEEN.  KIND is
 515    'I' for an inline function; 'F' if a normal function declaration
 516    preceded by 'extern "C"' (or nested inside 'extern "C"' braces); or
 517    'f' for other function declarations.  */
 518
 519 void
 520 recognized_function (fname, kind, have_arg_list, file_seen)
 521      const cpp_token *fname;
 522      int kind; /* One of 'f' 'F' or 'I' */
 523      int have_arg_list;
 524      const char *file_seen;
 525 {
 526   struct partial_proto *partial;
 527   int i;
 528   struct fn_decl *fn;
 529 #if ADD_MISSING_EXTERN_C
 530   if (kind == 'f')
 531     missing_extern_C_count++;
 532 #endif
 533
 534   fn = lookup_std_proto ((const char *)fname->val.name.text,
 535                          fname->val.name.len);
 536
 537   /* Remove the function from the list of required function.  */
 538   if (fn)
 539     {
 540       if (REQUIRED (fn))
 541         required_unseen_count--;
 542       SET_SEEN (fn);
 543     }
 544
 545   /* If we have a full prototype, we're done.  */
 546   if (have_arg_list)
 547     return;
 548
 549   if (kind == 'I')  /* don't edit inline function */
 550     return;
 551
 552   /* If the partial prototype was included from some other file,
 553      we don't need to patch it up (in this run).  */
 554   i = strlen (file_seen);
 555   if (i < inc_filename_length
 556       || strcmp (inc_filename, file_seen + (i - inc_filename_length)) != 0)
 557     return;
 558
 559   if (fn == NULL)
 560     return;
 561   if (fn->params[0] == '\0')
 562     return;
 563
 564   /* We only have a partial function declaration,
 565      so remember that we have to add a complete prototype.  */
 566   partial_count++;
 567   partial = (struct partial_proto *)
 568     obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 569   partial->line_seen = fname->line;
 570   partial->fn = fn;
 571   fn->partial = partial;
 572   partial->next = partial_proto_list;
 573   partial_proto_list = partial;
 574   if (verbose)
 575     {
 576       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 577                inc_filename, fn->fname);
 578     }
 579 }
 580
 581 /* For any name in NAMES that is defined as a macro,
 582    call recognized_macro on it.  */
 583
 584 static void
 585 check_macro_names (pfile, names)
 586      cpp_reader *pfile;
 587      namelist names;
 588 {
 589   size_t len;
 590   while (*names)
 591     {
 592       len = strlen (names);
 593       if (cpp_defined (pfile, (const unsigned char *)names, len))
 594         recognized_macro (names);
 595       names += len + 1;
 596     }
 597 }
 598
 599 static void
 600 read_scan_file (in_fname, argc, argv)
 601      char *in_fname;
 602      int argc;
 603      char **argv;
 604 {
 605   cpp_reader scan_in;
 606   struct fn_decl *fn;
 607   int i;
 608   register struct symbol_list *cur_symbols;
 609
 610   obstack_init (&scan_file_obstack);
 611
 612   cpp_reader_init (&scan_in);
 613   /* We are going to be scanning a header file out of its proper context,
 614      so ignore warnings and errors.  */
 615   CPP_OPTION (&scan_in, inhibit_warnings) = 1;
 616   CPP_OPTION (&scan_in, inhibit_errors) = 1;
 617   i = cpp_handle_options (&scan_in, argc, argv);
 618   if (i < argc && ! CPP_FATAL_ERRORS (&scan_in))
 619     cpp_fatal (&scan_in, "Invalid option `%s'", argv[i]);
 620   if (CPP_FATAL_ERRORS (&scan_in))
 621     exit (FATAL_EXIT_CODE);
 622
 623   if (! cpp_start_read (&scan_in, 0, in_fname))
 624     exit (FATAL_EXIT_CODE);
 625
 626   /* We are scanning a system header, so mark it as such.  */
 627   cpp_make_system_header (&scan_in, CPP_BUFFER (&scan_in), 1);
 628
 629   scan_decls (&scan_in, argc, argv);
 630   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 631     check_macro_names (&scan_in, cur_symbols->names);
 632
 633   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 634      If so, those functions are also required.  */
 635   if (special_file_handling == stdio_h
 636       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 637     {
 638       static const unsigned char getchar_call[] = "getchar();";
 639       int seen_filbuf = 0;
 640       cpp_buffer *buf = CPP_BUFFER (&scan_in);
 641       if (cpp_push_buffer (&scan_in, getchar_call,
 642                            sizeof(getchar_call) - 1) == NULL)
 643         return;
 644
 645       /* Scan the macro expansion of "getchar();".  */
 646       for (;;)
 647         {
 648           const cpp_token *t = cpp_get_token (&scan_in);
 649
 650           if (t->type == CPP_EOF)
 651             {
 652               cpp_pop_buffer (&scan_in);
 653               if (CPP_BUFFER (&scan_in) == buf)
 654                 break;
 655             }
 656           else if (t->type == CPP_NAME && cpp_idcmp (t->val.name.text,
 657                                                      t->val.name.len,
 658                                                      "_filbuf") == 0)
 659             seen_filbuf++;
 660         }
 661       if (seen_filbuf)
 662         {
 663           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 664           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 665           int need_flsbuf
 666             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 667
 668           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 669           if (need_filbuf + need_flsbuf)
 670             {
 671               const char *new_list;
 672               if (need_filbuf)
 673                 SET_REQUIRED (fn);
 674               if (need_flsbuf)
 675                 SET_REQUIRED (flsbuf_fn);
 676               if (need_flsbuf && need_filbuf)
 677                 new_list = "_filbuf\0_flsbuf\0";
 678               else if (need_flsbuf)
 679                 new_list = "_flsbuf\0";
 680               else /* if (need_flsbuf) */
 681                 new_list = "_filbuf\0";
 682               add_symbols (ANSI_SYMBOL, new_list);
 683               required_unseen_count += need_filbuf + need_flsbuf;
 684             }
 685         }
 686     }
 687
 688   if (required_unseen_count + partial_count + required_other
 689 #if ADD_MISSING_EXTERN_C
 690       + missing_extern_C_count
 691 #endif
 692       == 0)
 693     {
 694       if (verbose)
 695         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 696       exit (SUCCESS_EXIT_CODE);
 697     }
 698   if (!verbose)
 699     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 700   else
 701     {
 702       if (required_unseen_count)
 703         fprintf (stderr, "%s: %d missing function declarations.\n",
 704                  inc_filename, required_unseen_count);
 705       if (partial_count)
 706         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 707                  inc_filename, partial_count);
 708 #if ADD_MISSING_EXTERN_C
 709       if (missing_extern_C_count)
 710         fprintf (stderr,
 711                  "%s: %d declarations not protected by extern \"C\".\n",
 712                  inc_filename, missing_extern_C_count);
 713 #endif
 714     }
 715 }
 716
 717 static void
 718 write_rbrac ()
 719 {
 720   struct fn_decl *fn;
 721   const char *cptr;
 722   register struct symbol_list *cur_symbols;
 723
 724   if (required_unseen_count)
 725     {
 726 #ifdef NO_IMPLICIT_EXTERN_C
 727       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 728 #endif
 729     }
 730
 731   /* Now we print out prototypes for those functions that we haven't seen.  */
 732   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 733     {
 734       int if_was_emitted = 0;
 735       int name_len;
 736       cptr = cur_symbols->names;
 737       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 738         {
 739           int macro_protect = 0;
 740
 741           if (cur_symbols->flags & MACRO_SYMBOL)
 742             continue;
 743
 744           fn = lookup_std_proto (cptr, name_len);
 745           if (fn == NULL || !REQUIRED (fn))
 746             continue;
 747
 748           if (!if_was_emitted)
 749             {
 750 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 751               if (cur_symbols->flags & ANSI_SYMBOL)
 752                 fprintf (outf,
 753          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 754               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 755                 fprintf (outf,
 756        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 757     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 758     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 759               else if (cur_symbols->flags & XOPEN_SYMBOL)
 760                 {
 761                 fprintf (outf,
 762        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 763    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 764                 }
 765               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 766                 {
 767                 fprintf (outf,
 768        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 769    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 770                 }
 771               else
 772                 {
 773                   fatal ("internal error for function %s", fn->fname);
 774                 }
 775               if_was_emitted = 1;
 776             }
 777
 778           /* In the case of memmove, protect in case the application
 779              defines it as a macro before including the header.  */
 780           if (!strcmp (fn->fname, "memmove")
 781               || !strcmp (fn->fname, "vprintf")
 782               || !strcmp (fn->fname, "vfprintf")
 783               || !strcmp (fn->fname, "vsprintf")
 784               || !strcmp (fn->fname, "rewinddir")
 785               || !strcmp (fn->fname, "abort"))
 786             macro_protect = 1;
 787
 788           if (macro_protect)
 789             fprintf (outf, "#ifndef %s\n", fn->fname);
 790           fprintf (outf, "extern %s %s (%s);\n",
 791                    fn->rtype, fn->fname, fn->params);
 792           if (macro_protect)
 793             fprintf (outf, "#endif\n");
 794         }
 795       if (if_was_emitted)
 796         fprintf (outf,
 797                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 798     }
 799   if (required_unseen_count)
 800     {
 801 #ifdef NO_IMPLICIT_EXTERN_C
 802       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 803 #endif
 804     }
 805
 806   switch (special_file_handling)
 807     {
 808     case errno_h:
 809       if (!seen_errno)
 810         fprintf (outf, "extern int errno;\n");
 811       break;
 812     case stdlib_h:
 813       if (!seen_EXIT_FAILURE)
 814         fprintf (outf, "#define EXIT_FAILURE 1\n");
 815       if (!seen_EXIT_SUCCESS)
 816         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 817       break;
 818     case sys_stat_h:
 819       if (!seen_S_ISBLK && seen_S_IFBLK)
 820         fprintf (outf,
 821                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 822       if (!seen_S_ISCHR && seen_S_IFCHR)
 823         fprintf (outf,
 824                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 825       if (!seen_S_ISDIR && seen_S_IFDIR)
 826         fprintf (outf,
 827                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 828       if (!seen_S_ISFIFO && seen_S_IFIFO)
 829         fprintf (outf,
 830                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 831       if (!seen_S_ISLNK && seen_S_IFLNK)
 832         fprintf (outf,
 833                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 834       if (!seen_S_ISREG && seen_S_IFREG)
 835         fprintf (outf,
 836                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 837       break;
 838
 839     default:
 840       break;
 841     }
 842
 843
 844 #if ADD_MISSING_EXTERN_C
 845   if (missing_extern_C_count + required_unseen_count > 0)
 846     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 847 #endif
 848 }
 849
 850 /* Returns 1 iff the file is properly protected from multiple inclusion:
 851    #ifndef PROTECT_NAME
 852    #define PROTECT_NAME
 853    #endif
 854
 855  */
 856
 857 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 858 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 859
 860 static int
 861 inf_skip_spaces (c)
 862      int c;
 863 {
 864   for (;;)
 865     {
 866       if (c == ' ' || c == '\t')
 867         c = INF_GET ();
 868       else if (c == '/')
 869         {
 870           c = INF_GET ();
 871           if (c != '*')
 872             {
 873               (void) INF_UNGET (c);
 874               return '/';
 875             }
 876           c = INF_GET ();
 877           for (;;)
 878             {
 879               if (c == EOF)
 880                 return EOF;
 881               else if (c != '*')
 882                 {
 883                   if (c == '\n')
 884                     source_lineno++, lineno++;
 885                   c = INF_GET ();
 886                 }
 887               else if ((c = INF_GET ()) == '/')
 888                 return INF_GET ();
 889             }
 890         }
 891       else
 892         break;
 893     }
 894   return c;
 895 }
 896
 897 /* Read into STR from inf_buffer upto DELIM.  */
 898
 899 static int
 900 inf_read_upto (str, delim)
 901      sstring *str;
 902      int delim;
 903 {
 904   int ch;
 905   for (;;)
 906     {
 907       ch = INF_GET ();
 908       if (ch == EOF || ch == delim)
 909         break;
 910       SSTRING_PUT (str, ch);
 911     }
 912   MAKE_SSTRING_SPACE (str, 1);
 913   *str->ptr = 0;
 914   return ch;
 915 }
 916
 917 static int
 918 inf_scan_ident (s, c)
 919      register sstring *s;
 920      int c;
 921 {
 922   s->ptr = s->base;
 923   if (ISALPHA (c) || c == '_')
 924     {
 925       for (;;)
 926         {
 927           SSTRING_PUT (s, c);
 928           c = INF_GET ();
 929           if (c == EOF || !(ISALNUM (c) || c == '_'))
 930             break;
 931         }
 932     }
 933   MAKE_SSTRING_SPACE (s, 1);
 934   *s->ptr = 0;
 935   return c;
 936 }
 937
 938 /* Returns 1 if the file is correctly protected against multiple
 939    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 940    and setting *endif_line to the final #endif.
 941    Otherwise return 0.  */
 942
 943 static int
 944 check_protection (ifndef_line, endif_line)
 945      int *ifndef_line, *endif_line;
 946 {
 947   int c;
 948   int if_nesting = 1; /* Level of nesting of #if's */
 949   char *protect_name = NULL; /* Identifier following initial #ifndef */
 950   int define_seen = 0;
 951
 952   /* Skip initial white space (including comments).  */
 953   for (;; lineno++)
 954     {
 955       c = inf_skip_spaces (' ');
 956       if (c == EOF)
 957         return 0;
 958       if (c != '\n')
 959         break;
 960     }
 961   if (c != '#')
 962     return 0;
 963   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 964   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 965     return 0;
 966
 967   /* So far so good: We've seen an initial #ifndef.  */
 968   *ifndef_line = lineno;
 969   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 970   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 971     return 0;
 972   protect_name = xstrdup (buf.base);
 973
 974   (void) INF_UNGET (c);
 975   c = inf_read_upto (&buf, '\n');
 976   if (c == EOF)
 977     return 0;
 978   lineno++;
 979
 980   for (;;)
 981     {
 982       c = inf_skip_spaces (' ');
 983       if (c == EOF)
 984         return 0;
 985       if (c == '\n')
 986         {
 987           lineno++;
 988           continue;
 989         }
 990       if (c != '#')
 991         goto skip_to_eol;
 992       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 993       if (SSTRING_LENGTH (&buf) == 0)
 994         ;
 995       else if (!strcmp (buf.base, "ifndef")
 996           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
 997         {
 998           if_nesting++;
 999         }
1000       else if (!strcmp (buf.base, "endif"))
1001         {
1002           if_nesting--;
1003           if (if_nesting == 0)
1004             break;
1005         }
1006       else if (!strcmp (buf.base, "else"))
1007         {
1008           if (if_nesting == 1)
1009             return 0;
1010         }
1011       else if (!strcmp (buf.base, "define"))
1012         {
1013           c = inf_skip_spaces (c);
1014           c = inf_scan_ident (&buf, c);
1015           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1016             define_seen = 1;
1017         }
1018     skip_to_eol:
1019       for (;;)
1020         {
1021           if (c == '\n' || c == EOF)
1022             break;
1023           c = INF_GET ();
1024         }
1025       if (c == EOF)
1026         return 0;
1027       lineno++;
1028     }
1029
1030   if (!define_seen)
1031      return 0;
1032   *endif_line = lineno;
1033   /* Skip final white space (including comments).  */
1034   for (;;)
1035     {
1036       c = inf_skip_spaces (' ');
1037       if (c == EOF)
1038         break;
1039       if (c != '\n')
1040         return 0;
1041     }
1042
1043   return 1;
1044 }
1045
1046 extern int main                 PARAMS ((int, char **));
1047
1048 int
1049 main (argc, argv)
1050      int argc;
1051      char **argv;
1052 {
1053   int inf_fd;
1054   struct stat sbuf;
1055   int c;
1056 #ifdef FIXPROTO_IGNORE_LIST
1057   int i;
1058 #endif
1059   const char *cptr;
1060   int ifndef_line;
1061   int endif_line;
1062   long to_read;
1063   long int inf_size;
1064   register struct symbol_list *cur_symbols;
1065
1066   if (argv[0] && argv[0][0])
1067     {
1068       register char *p;
1069
1070       progname = 0;
1071       for (p = argv[0]; *p; p++)
1072         if (*p == '/')
1073           progname = p;
1074       progname = progname ? progname+1 : argv[0];
1075     }
1076
1077   if (argc < 4)
1078     {
1079       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1080                progname);
1081       exit (FATAL_EXIT_CODE);
1082     }
1083
1084   inc_filename = argv[1];
1085   inc_filename_length = strlen (inc_filename);
1086
1087 #ifdef FIXPROTO_IGNORE_LIST
1088   for (i = 0; files_to_ignore[i] != NULL; i++)
1089     {
1090       char *ignore_name = files_to_ignore[i];
1091       int ignore_len = strlen (ignore_name);
1092       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1093         {
1094           if (ignore_name[ignore_len-1] == '/'
1095               || inc_filename[ignore_len] == '\0')
1096             {
1097               if (verbose)
1098                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1099               exit (SUCCESS_EXIT_CODE);
1100             }
1101         }
1102
1103     }
1104 #endif
1105
1106   if (strcmp (inc_filename, "sys/stat.h") == 0)
1107     special_file_handling = sys_stat_h;
1108   else if (strcmp (inc_filename, "errno.h") == 0)
1109     special_file_handling = errno_h, required_other++;
1110   else if (strcmp (inc_filename, "stdlib.h") == 0)
1111     special_file_handling = stdlib_h, required_other+=2;
1112   else if (strcmp (inc_filename, "stdio.h") == 0)
1113     special_file_handling = stdio_h;
1114   include_entry = std_include_table;
1115   while (include_entry->name != NULL
1116          && ((strcmp (include_entry->name, CONTINUED) == 0)
1117              || strcmp (inc_filename, include_entry->name) != 0))
1118     include_entry++;
1119
1120   if (include_entry->name != NULL)
1121     {
1122       struct std_include_entry *entry;
1123       cur_symbol_table_size = 0;
1124       for (entry = include_entry; ;)
1125         {
1126           if (entry->flags)
1127             add_symbols (entry->flags, entry->names);
1128           entry++;
1129           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1130             break;
1131         }
1132     }
1133   else
1134     symbol_table[0].names = NULL;
1135
1136   /* Count and mark the prototypes required for this include file.  */
1137   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1138     {
1139       int name_len;
1140       if (cur_symbols->flags & MACRO_SYMBOL)
1141         continue;
1142       cptr = cur_symbols->names;
1143       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1144         {
1145           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1146           required_unseen_count++;
1147           if (fn == NULL)
1148             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1149           else
1150             SET_REQUIRED (fn);
1151         }
1152     }
1153
1154   read_scan_file (argv[2], argc - 4, argv + 4);
1155
1156   inf_fd = open (argv[2], O_RDONLY, 0666);
1157   if (inf_fd < 0)
1158     {
1159       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1160                progname, argv[2]);
1161       perror (NULL);
1162       exit (FATAL_EXIT_CODE);
1163     }
1164   if (fstat (inf_fd, &sbuf) < 0)
1165     {
1166       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1167       perror (NULL);
1168       exit (FATAL_EXIT_CODE);
1169     }
1170   inf_size = sbuf.st_size;
1171   inf_buffer = (char *) xmalloc (inf_size + 2);
1172   inf_buffer[inf_size] = '\n';
1173   inf_buffer[inf_size + 1] = '\0';
1174   inf_limit = inf_buffer + inf_size;
1175   inf_ptr = inf_buffer;
1176
1177   to_read = inf_size;
1178   while (to_read > 0)
1179     {
1180       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1181       if (i < 0)
1182         {
1183           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1184           perror (NULL);
1185           exit (FATAL_EXIT_CODE);
1186         }
1187       if (i == 0)
1188         {
1189           inf_size -= to_read;
1190           break;
1191         }
1192       to_read -= i;
1193     }
1194
1195   close (inf_fd);
1196
1197   /* If file doesn't end with '\n', add one.  */
1198   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1199     inf_limit++;
1200
1201   unlink (argv[3]);
1202   outf = fopen (argv[3], "w");
1203   if (outf == NULL)
1204     {
1205       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1206                progname, argv[3]);
1207       perror (NULL);
1208       exit (FATAL_EXIT_CODE);
1209     }
1210
1211   lineno = 1;
1212
1213   if (check_protection (&ifndef_line, &endif_line))
1214     {
1215       lbrac_line = ifndef_line+1;
1216       rbrac_line = endif_line;
1217     }
1218   else
1219     {
1220       lbrac_line = 1;
1221       rbrac_line = -1;
1222     }
1223
1224   /* Reset input file.  */
1225   inf_ptr = inf_buffer;
1226   lineno = 1;
1227
1228   for (;;)
1229     {
1230       if (lineno == lbrac_line)
1231         write_lbrac ();
1232       if (lineno == rbrac_line)
1233         write_rbrac ();
1234       for (;;)
1235         {
1236           struct fn_decl *fn;
1237           c = INF_GET ();
1238           if (c == EOF)
1239             break;
1240           if (ISALPHA (c) || c == '_')
1241             {
1242               c = inf_scan_ident (&buf, c);
1243               (void) INF_UNGET (c);
1244               fputs (buf.base, outf);
1245               fn = lookup_std_proto (buf.base, strlen (buf.base));
1246               /* We only want to edit the declaration matching the one
1247                  seen by scan-decls, as there can be multiple
1248                  declarations, selected by #ifdef __STDC__ or whatever.  */
1249               if (fn && fn->partial && fn->partial->line_seen == lineno)
1250                 {
1251                   c = inf_skip_spaces (' ');
1252                   if (c == EOF)
1253                     break;
1254                   if (c == '(')
1255                     {
1256                       c = inf_skip_spaces (' ');
1257                       if (c == ')')
1258                         {
1259                           fprintf (outf, " _PARAMS((%s))", fn->params);
1260                         }
1261                       else
1262                         {
1263                           putc ('(', outf);
1264                           (void) INF_UNGET (c);
1265                         }
1266                     }
1267                   else
1268                     fprintf (outf, " %c", c);
1269                 }
1270             }
1271           else
1272             {
1273               putc (c, outf);
1274               if (c == '\n')
1275                 break;
1276             }
1277         }
1278       if (c == EOF)
1279         break;
1280       lineno++;
1281     }
1282   if (rbrac_line < 0)
1283     write_rbrac ();
1284
1285   fclose (outf);
1286
1287   return 0;
1288 }
1289 \f
1290
1291 static void
1292 v_fatal (str, ap)
1293   const char * str;
1294   va_list ap;
1295 {
1296   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1297   vfprintf (stderr, str, ap);
1298   fprintf (stderr, "\n");
1299
1300   exit (FATAL_EXIT_CODE);
1301 }
1302
1303 static void
1304 fatal VPARAMS ((const char *str, ...))
1305 {
1306 #ifndef ANSI_PROTOTYPES
1307   const char *str;
1308 #endif
1309   va_list ap;
1310
1311   VA_START(ap, str);
1312
1313 #ifndef ANSI_PROTOTYPES
1314   str = va_arg (ap, const char *);
1315 #endif
1316
1317   v_fatal(str, ap);
1318   va_end(ap);
1319 }