gcc/fix-header.c

   1 /* fix-header.c - Make C header file suitable for C++.
   2    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
   4
   5 This program is free software; you can redistribute it and/or modify it
   6 under the terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option) any
   8 later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 /* This program massages a system include file (such as stdio.h),
  20    into a form that is compatible with GNU C and GNU C++.
  21
  22    * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
  23    if they seem to be needed.  These prevent C++ compilers from name
  24    mangling the functions inside the braces.
  25
  26    * If an old-style incomplete function declaration is seen (without
  27    an argument list), and it is a "standard" function listed in
  28    the file sys-protos.h (and with a non-empty argument list), then
  29    the declaration is converted to a complete prototype by replacing
  30    the empty parameter list with the argument list from sys-protos.h.
  31
  32    * The program can be given a list of (names of) required standard
  33    functions (such as fclose for stdio.h).  If a required function
  34    is not seen in the input, then a prototype for it will be
  35    written to the output.
  36
  37    * If all of the non-comment code of the original file is protected
  38    against multiple inclusion:
  39         #ifndef FOO
  40         #define FOO
  41         <body of include file>
  42         #endif
  43    then extra matter added to the include file is placed inside the <body>.
  44
  45    * If the input file is OK (nothing needs to be done);
  46    the output file is not written (nor removed if it exists).
  47
  48    There are also some special actions that are done for certain
  49    well-known standard include files:
  50
  51    * If argv[1] is "sys/stat.h", the Posix.1 macros
  52    S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
  53    they were missing, and the corresponding "traditional" S_IFxxx
  54    macros were defined.
  55
  56    * If argv[1] is "errno.h", errno is declared if it was missing.
  57
  58    * TODO:  The input file should be read complete into memory, because:
  59    a) it needs to be scanned twice anyway, and
  60    b) it would be nice to allow update in place.
  61
  62    Usage:
  63         fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
  64    where:
  65    * FOO.H is the relative file name of the include file,
  66    as it would be #include'd by a C file.  (E.g. stdio.h)
  67    * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
  68    * OUTFILE.H is the full pathname for where to write the output file,
  69    if anything needs to be done.  (e.g. ./include/stdio.h)
  70    * OPTIONS can be -D or -I switches as you would pass to cpp.
  71
  72    Written by Per Bothner <bothner@cygnus.com>, July 1993.  */
  73
  74 #include "bconfig.h"
  75 #include "system.h"
  76 #include "coretypes.h"
  77 #include "tm.h"
  78 #include "obstack.h"
  79 #include "scan.h"
  80 #include "cpplib.h"
  81 #include "c-incpath.h"
  82 #include "errors.h"
  83
  84 #ifdef TARGET_EXTRA_INCLUDES
  85 static void hook_void_int(int u ATTRIBUTE_UNUSED) { }
  86
  87 struct target_c_incpath_s target_c_incpath = { hook_void_int };
  88 #endif
  89
  90 struct line_maps line_table;
  91
  92 sstring buf;
  93
  94 int verbose = 0;
  95 int partial_count = 0;
  96 int warnings = 0;
  97
  98 #if ADD_MISSING_EXTERN_C
  99 int missing_extern_C_count = 0;
 100 #endif
 101
 102 #include "xsys-protos.h"
 103
 104 #ifdef FIXPROTO_IGNORE_LIST
 105 /* This is a currently unused feature.  */
 106
 107 /* List of files and directories to ignore.
 108    A directory name (ending in '/') means ignore anything in that
 109    directory.  (It might be more efficient to do directory pruning
 110    earlier in fixproto, but this is simpler and easier to customize.) */
 111
 112 static const char *const files_to_ignore[] = {
 113   "X11/",
 114   FIXPROTO_IGNORE_LIST
 115   0
 116 };
 117 #endif
 118
 119 char *inf_buffer;
 120 char *inf_limit;
 121 char *inf_ptr;
 122 static const char *cur_file;
 123
 124 /* Certain standard files get extra treatment */
 125
 126 enum special_file
 127 {
 128   no_special,
 129 #ifdef errno_h
 130 #undef errno_h
 131 #endif
 132   errno_h,
 133 #ifdef stdio_h
 134 #undef stdio_h
 135 #endif
 136   stdio_h,
 137 #ifdef stdlib_h
 138 #undef stdlib_h
 139 #endif
 140   stdlib_h,
 141 #ifdef sys_stat_h
 142 #undef sys_stat_h
 143 #endif
 144   sys_stat_h
 145 };
 146
 147 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 148    by an empty name (i.e. by "\0\0").  */
 149
 150 typedef const char *namelist;
 151
 152 /* The following macros provide the bits for symbol_flags.  */
 153 typedef int symbol_flags;
 154
 155 /* Used to mark names defined in the ANSI/ISO C standard.  */
 156 #define ANSI_SYMBOL 1
 157
 158 /* We no longer massage include files for POSIX or XOPEN symbols,
 159    as there are now several versions of the POSIX and XOPEN standards,
 160    and it would be a maintenance nightmare for us to track them all.
 161    Better to be compatible with the system include files.  */
 162 /*#define ADD_MISSING_POSIX 1 */
 163 /*#define ADD_MISSING_XOPEN 1 */
 164
 165 #if ADD_MISSING_POSIX
 166 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 167 #define POSIX1_SYMBOL 2
 168 #define POSIX2_SYMBOL 4
 169 #else
 170 #define POSIX1_SYMBOL 0
 171 #define POSIX2_SYMBOL 0
 172 #endif
 173
 174 #if ADD_MISSING_XOPEN
 175 /* Used to mark names defined in X/Open Portability Guide.  */
 176 #define XOPEN_SYMBOL 8
 177 /* Used to mark names defined in X/Open UNIX Extensions.  */
 178 #define XOPEN_EXTENDED_SYMBOL 16
 179 #else
 180 #define XOPEN_SYMBOL 0
 181 #define XOPEN_EXTENDED_SYMBOL 0
 182 #endif
 183
 184 /* Used to indicate names that are not functions */
 185 #define MACRO_SYMBOL 512
 186
 187 struct symbol_list {
 188   symbol_flags flags;
 189   namelist names;
 190 };
 191
 192 #define SYMBOL_TABLE_SIZE 10
 193 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 194 int cur_symbol_table_size;
 195
 196 static void add_symbols (symbol_flags, namelist);
 197 static struct fn_decl *lookup_std_proto (const char *, int);
 198 static void write_lbrac (void);
 199 static void recognized_macro (const char *);
 200 static void check_macro_names (cpp_reader *, namelist);
 201 static void read_scan_file (char *, int, char **);
 202 static void write_rbrac (void);
 203 static int inf_skip_spaces (int);
 204 static int inf_read_upto (sstring *, int);
 205 static int inf_scan_ident (sstring *, int);
 206 static int check_protection (int *, int *);
 207 static void cb_file_change (cpp_reader *, const struct line_map *);
 208
 209 static void
 210 add_symbols (symbol_flags flags, namelist names)
 211 {
 212   symbol_table[cur_symbol_table_size].flags = flags;
 213   symbol_table[cur_symbol_table_size].names = names;
 214   cur_symbol_table_size++;
 215   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 216     fatal ("too many calls to add_symbols");
 217   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 218 }
 219
 220 struct std_include_entry {
 221   const char *const name;
 222   const symbol_flags flags;
 223   const namelist names;
 224 };
 225
 226 const char NONE[] = "";  /* The empty namelist.  */
 227
 228 /* Special name to indicate a continuation line in std_include_table.  */
 229 const char CONTINUED[] = "";
 230
 231 const struct std_include_entry *include_entry;
 232
 233 const struct std_include_entry std_include_table [] = {
 234   { "ctype.h", ANSI_SYMBOL,
 235       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 236 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 237
 238   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 239
 240   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 241
 242   /* ANSI_SYMBOL is wrong, but ...  */
 243   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 244 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 245 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 246 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 247 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 248
 249   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 250
 251   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 252   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 253
 254 /*{ "limit.h", ... provided by gcc }, */
 255
 256   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 257
 258   { "math.h", ANSI_SYMBOL,
 259       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 260 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 261 tan\0tanh\0" },
 262
 263   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 264
 265   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 266
 267   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 268   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 269
 270   /* Left out signal() - its prototype is too complex for us!
 271      Also left out "sigaction sigaddset sigdelset sigemptyset
 272      sigfillset sigismember sigpending sigprocmask sigsuspend"
 273      because these need sigset_t or struct sigaction.
 274      Most systems that provide them will also declare them.  */
 275   { "signal.h", ANSI_SYMBOL, "raise\0" },
 276   { CONTINUED, POSIX1_SYMBOL, "kill\0" },
 277
 278   { "stdio.h", ANSI_SYMBOL,
 279       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 280 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 281 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 282 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 283 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 284 tmpnam\0ungetc\0" },
 285   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 286   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 287 /* Should perhaps also handle NULL, EOF, ... ? */
 288
 289   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 290      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 291      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 292      Should perhaps also add NULL */
 293   { "stdlib.h", ANSI_SYMBOL,
 294       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 295 exit\0free\0getenv\0labs\0malloc\0qsort\0rand\0realloc\0\
 296 srand\0strtod\0strtol\0strtoul\0system\0" },
 297   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 298   { CONTINUED, POSIX1_SYMBOL, "putenv\0" },
 299
 300   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 301 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 302 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 303 strtok\0strxfrm\0" },
 304 /* Should perhaps also add NULL and size_t */
 305
 306   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 307       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 308
 309   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 310
 311   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 312      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 313      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 314   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 315
 316   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 317
 318   { "sys/stat.h", POSIX1_SYMBOL,
 319       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 320   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 321       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 322 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 323   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 324
 325 #if 0
 326 /* How do we handle fd_set? */
 327   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 328   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 329 #endif
 330
 331   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 332   /* "sys/types.h" add types (not in old g++-include) */
 333
 334   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 335
 336   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 337   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 338       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 339 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 340
 341   { "tar.h", POSIX1_SYMBOL, NONE },
 342
 343   { "termios.h", POSIX1_SYMBOL,
 344       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 345
 346   { "time.h", ANSI_SYMBOL,
 347       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0" },
 348   { CONTINUED, POSIX1_SYMBOL, "tzset\0" },
 349
 350   { "unistd.h", POSIX1_SYMBOL,
 351       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 352 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 353 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 354 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 355 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 356 ttyname\0unlink\0write\0" },
 357   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 358   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 359       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 360
 361   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 362
 363   { NULL, 0, NONE }
 364 };
 365
 366 enum special_file special_file_handling = no_special;
 367
 368 /* They are set if the corresponding macro has been seen.  */
 369 /* The following are only used when handling sys/stat.h */
 370 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 371 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 372 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 373 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 374 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 375 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 376 /* The following are only used when handling errno.h */
 377 int seen_errno = 0;
 378 /* The following are only used when handling stdlib.h */
 379 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 380 \f
 381 struct obstack scan_file_obstack;
 382
 383 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 384
 385 static struct fn_decl *
 386 lookup_std_proto (const char *name, int name_length)
 387 {
 388   int i = hashstr (name, name_length) % HASH_SIZE;
 389   int i0 = i;
 390   for (;;)
 391     {
 392       struct fn_decl *fn;
 393       if (hash_tab[i] == 0)
 394         return NULL;
 395       fn = &std_protos[hash_tab[i]];
 396       if ((int) strlen (fn->fname) == name_length
 397           && strncmp (fn->fname, name, name_length) == 0)
 398         return fn;
 399       i = (i+1) % HASH_SIZE;
 400       if (i == i0)
 401         abort ();
 402     }
 403 }
 404
 405 char *inc_filename;
 406 int inc_filename_length;
 407 FILE *outf;
 408 sstring line;
 409
 410 int lbrac_line, rbrac_line;
 411
 412 int required_unseen_count = 0;
 413 int required_other = 0;
 414
 415 static void
 416 write_lbrac (void)
 417 {
 418   if (partial_count)
 419     {
 420       fprintf (outf, "#ifndef _PARAMS\n");
 421       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 422       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 423       fprintf (outf, "#else\n");
 424       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 425       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 426     }
 427 }
 428
 429 struct partial_proto
 430 {
 431   struct partial_proto *next;
 432   struct fn_decl *fn;
 433   int line_seen;
 434 };
 435
 436 struct partial_proto *partial_proto_list = NULL;
 437
 438 struct partial_proto required_dummy_proto, seen_dummy_proto;
 439 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 440 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 441 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 442 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 443
 444 static void
 445 recognized_macro (const char *fname)
 446 {
 447   /* The original include file defines fname as a macro.  */
 448   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 449
 450   /* Since fname is a macro, don't require a prototype for it.  */
 451   if (fn)
 452     {
 453       if (REQUIRED (fn))
 454         required_unseen_count--;
 455       SET_SEEN (fn);
 456     }
 457
 458   switch (special_file_handling)
 459     {
 460     case errno_h:
 461       if (strcmp (fname, "errno") == 0 && !seen_errno)
 462         seen_errno = 1, required_other--;
 463       break;
 464     case stdlib_h:
 465       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 466         seen_EXIT_FAILURE = 1, required_other--;
 467       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 468         seen_EXIT_SUCCESS = 1, required_other--;
 469       break;
 470     case sys_stat_h:
 471       if (fname[0] == 'S' && fname[1] == '_')
 472         {
 473           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 474           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 475           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 476           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 477           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 478           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 479           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 480           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 481           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 482           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 483           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 484           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 485         }
 486       break;
 487
 488     default:
 489       break;
 490     }
 491 }
 492
 493 void
 494 recognized_extern (const cpp_token *name)
 495 {
 496   switch (special_file_handling)
 497     {
 498     case errno_h:
 499       if (cpp_ideq (name, "errno"))
 500         seen_errno = 1, required_other--;
 501       break;
 502
 503     default:
 504       break;
 505     }
 506 }
 507
 508 /* Called by scan_decls if it saw a function definition for a function
 509    named FNAME.  KIND is 'I' for an inline function; 'F' if a normal
 510    function declaration preceded by 'extern "C"' (or nested inside
 511    'extern "C"' braces); or 'f' for other function declarations.  */
 512
 513 void
 514 recognized_function (const cpp_token *fname, unsigned int line, int kind,
 515                      int have_arg_list)
 516 {
 517   struct partial_proto *partial;
 518   int i;
 519   struct fn_decl *fn;
 520
 521   fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
 522                          NODE_LEN (fname->val.node));
 523
 524   /* Remove the function from the list of required function.  */
 525   if (fn)
 526     {
 527       if (REQUIRED (fn))
 528         required_unseen_count--;
 529       SET_SEEN (fn);
 530     }
 531
 532   /* If we have a full prototype, we're done.  */
 533   if (have_arg_list)
 534     return;
 535
 536   if (kind == 'I')  /* don't edit inline function */
 537     return;
 538
 539   /* If the partial prototype was included from some other file,
 540      we don't need to patch it up (in this run).  */
 541   i = strlen (cur_file);
 542   if (i < inc_filename_length
 543       || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
 544     return;
 545
 546   if (fn == NULL)
 547     return;
 548   if (fn->params[0] == '\0')
 549     return;
 550
 551   /* We only have a partial function declaration,
 552      so remember that we have to add a complete prototype.  */
 553   partial_count++;
 554   partial = obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 555   partial->line_seen = line;
 556   partial->fn = fn;
 557   fn->partial = partial;
 558   partial->next = partial_proto_list;
 559   partial_proto_list = partial;
 560   if (verbose)
 561     {
 562       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 563                inc_filename, fn->fname);
 564     }
 565 }
 566
 567 /* For any name in NAMES that is defined as a macro,
 568    call recognized_macro on it.  */
 569
 570 static void
 571 check_macro_names (cpp_reader *pfile, namelist names)
 572 {
 573   size_t len;
 574   while (*names)
 575     {
 576       len = strlen (names);
 577       if (cpp_defined (pfile, (const unsigned char *)names, len))
 578         recognized_macro (names);
 579       names += len + 1;
 580     }
 581 }
 582
 583 static void
 584 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
 585                 const struct line_map *map)
 586 {
 587   /* Just keep track of current file name.  */
 588   cur_file = map == NULL ? NULL : map->to_file;
 589 }
 590
 591 static void
 592 read_scan_file (char *in_fname, int argc, char **argv)
 593 {
 594   cpp_reader *scan_in;
 595   cpp_callbacks *cb;
 596   cpp_options *options;
 597   struct fn_decl *fn;
 598   int i, strings_processed;
 599   struct symbol_list *cur_symbols;
 600
 601   obstack_init (&scan_file_obstack);
 602
 603   linemap_init (&line_table);
 604   scan_in = cpp_create_reader (CLK_GNUC89, NULL, &line_table);
 605   cb = cpp_get_callbacks (scan_in);
 606   cb->file_change = cb_file_change;
 607
 608   /* We are going to be scanning a header file out of its proper context,
 609      so ignore warnings and errors.  */
 610   options = cpp_get_options (scan_in);
 611   options->inhibit_warnings = 1;
 612   options->inhibit_errors = 1;
 613   cpp_post_options (scan_in);
 614
 615   if (!cpp_read_main_file (scan_in, in_fname))
 616     exit (FATAL_EXIT_CODE);
 617
 618   cpp_change_file (scan_in, LC_RENAME, "<built-in>");
 619   cpp_init_builtins (scan_in, true);
 620   cpp_change_file (scan_in, LC_RENAME, in_fname);
 621
 622   /* Process switches after builtins so -D can override them.  */
 623   for (i = 0; i < argc; i += strings_processed)
 624     {
 625       strings_processed = 0;
 626       if (argv[i][0] == '-')
 627         {
 628           if (argv[i][1] == 'I')
 629             {
 630               if (argv[i][2] != '\0')
 631                 {
 632                   strings_processed = 1;
 633                   add_path (xstrdup (argv[i] + 2), BRACKET, false, false);
 634                 }
 635               else if (i + 1 != argc)
 636                 {
 637                   strings_processed = 2;
 638                   add_path (xstrdup (argv[i + 1]), BRACKET, false, false);
 639                 }
 640             }
 641           else if (argv[i][1] == 'D')
 642             {
 643               if (argv[i][2] != '\0')
 644                 strings_processed = 1, cpp_define (scan_in, argv[i] + 2);
 645               else if (i + 1 != argc)
 646                 strings_processed = 2, cpp_define (scan_in, argv[i + 1]);
 647             }
 648         }
 649
 650       if (strings_processed == 0)
 651         break;
 652     }
 653
 654   if (i < argc)
 655     cpp_error (scan_in, CPP_DL_ERROR, "invalid option `%s'", argv[i]);
 656   if (cpp_errors (scan_in))
 657     exit (FATAL_EXIT_CODE);
 658
 659   register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
 660                            true /* stdinc */, false /* cxx_stdinc */,
 661                            false /* verbose */);
 662
 663   /* We are scanning a system header, so mark it as such.  */
 664   cpp_make_system_header (scan_in, 1, 0);
 665
 666   scan_decls (scan_in, argc, argv);
 667   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 668     check_macro_names (scan_in, cur_symbols->names);
 669
 670   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 671      If so, those functions are also required.  */
 672   if (special_file_handling == stdio_h
 673       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 674     {
 675       unsigned char getchar_call[] = "getchar();\n";
 676       int seen_filbuf = 0;
 677
 678       /* Scan the macro expansion of "getchar();".  */
 679       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 680                        /* from_stage3 */ true);
 681       for (;;)
 682         {
 683           const cpp_token *t = cpp_get_token (scan_in);
 684
 685           if (t->type == CPP_EOF)
 686             break;
 687           else if (cpp_ideq (t, "_filbuf"))
 688             seen_filbuf++;
 689         }
 690
 691       if (seen_filbuf)
 692         {
 693           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 694           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 695           int need_flsbuf
 696             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 697
 698           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 699           if (need_filbuf + need_flsbuf)
 700             {
 701               const char *new_list;
 702               if (need_filbuf)
 703                 SET_REQUIRED (fn);
 704               if (need_flsbuf)
 705                 SET_REQUIRED (flsbuf_fn);
 706               if (need_flsbuf && need_filbuf)
 707                 new_list = "_filbuf\0_flsbuf\0";
 708               else if (need_flsbuf)
 709                 new_list = "_flsbuf\0";
 710               else /* if (need_flsbuf) */
 711                 new_list = "_filbuf\0";
 712               add_symbols (ANSI_SYMBOL, new_list);
 713               required_unseen_count += need_filbuf + need_flsbuf;
 714             }
 715         }
 716     }
 717
 718   if (required_unseen_count + partial_count + required_other == 0)
 719     {
 720       if (verbose)
 721         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 722       exit (SUCCESS_EXIT_CODE);
 723     }
 724   if (!verbose)
 725     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 726   else
 727     {
 728       if (required_unseen_count)
 729         fprintf (stderr, "%s: %d missing function declarations.\n",
 730                  inc_filename, required_unseen_count);
 731       if (partial_count)
 732         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 733                  inc_filename, partial_count);
 734     }
 735 }
 736
 737 static void
 738 write_rbrac (void)
 739 {
 740   struct fn_decl *fn;
 741   const char *cptr;
 742   struct symbol_list *cur_symbols;
 743
 744   if (required_unseen_count)
 745     {
 746 #ifdef NO_IMPLICIT_EXTERN_C
 747       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 748 #endif
 749     }
 750
 751   /* Now we print out prototypes for those functions that we haven't seen.  */
 752   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 753     {
 754       int if_was_emitted = 0;
 755       int name_len;
 756       cptr = cur_symbols->names;
 757       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 758         {
 759           int macro_protect = 0;
 760
 761           if (cur_symbols->flags & MACRO_SYMBOL)
 762             continue;
 763
 764           fn = lookup_std_proto (cptr, name_len);
 765           if (fn == NULL || !REQUIRED (fn))
 766             continue;
 767
 768           if (!if_was_emitted)
 769             {
 770 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 771               if (cur_symbols->flags & ANSI_SYMBOL)
 772                 fprintf (outf,
 773          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 774               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 775                 fprintf (outf,
 776        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 777     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 778     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 779               else if (cur_symbols->flags & XOPEN_SYMBOL)
 780                 {
 781                 fprintf (outf,
 782        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 783    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 784                 }
 785               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 786                 {
 787                 fprintf (outf,
 788        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 789    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 790                 }
 791               else
 792                 {
 793                   fatal ("internal error for function %s", fn->fname);
 794                 }
 795               if_was_emitted = 1;
 796             }
 797
 798           /* In the case of memmove, protect in case the application
 799              defines it as a macro before including the header.  */
 800           if (!strcmp (fn->fname, "memmove")
 801               || !strcmp (fn->fname, "putc")
 802               || !strcmp (fn->fname, "getc")
 803               || !strcmp (fn->fname, "vprintf")
 804               || !strcmp (fn->fname, "vfprintf")
 805               || !strcmp (fn->fname, "vsprintf")
 806               || !strcmp (fn->fname, "rewinddir")
 807               || !strcmp (fn->fname, "abort"))
 808             macro_protect = 1;
 809
 810           if (macro_protect)
 811             fprintf (outf, "#ifndef %s\n", fn->fname);
 812           fprintf (outf, "extern %s %s (%s);\n",
 813                    fn->rtype, fn->fname, fn->params);
 814           if (macro_protect)
 815             fprintf (outf, "#endif\n");
 816         }
 817       if (if_was_emitted)
 818         fprintf (outf,
 819                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 820     }
 821   if (required_unseen_count)
 822     {
 823 #ifdef NO_IMPLICIT_EXTERN_C
 824       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 825 #endif
 826     }
 827
 828   switch (special_file_handling)
 829     {
 830     case errno_h:
 831       if (!seen_errno)
 832         fprintf (outf, "extern int errno;\n");
 833       break;
 834     case stdlib_h:
 835       if (!seen_EXIT_FAILURE)
 836         fprintf (outf, "#define EXIT_FAILURE 1\n");
 837       if (!seen_EXIT_SUCCESS)
 838         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 839       break;
 840     case sys_stat_h:
 841       if (!seen_S_ISBLK && seen_S_IFBLK)
 842         fprintf (outf,
 843                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 844       if (!seen_S_ISCHR && seen_S_IFCHR)
 845         fprintf (outf,
 846                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 847       if (!seen_S_ISDIR && seen_S_IFDIR)
 848         fprintf (outf,
 849                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 850       if (!seen_S_ISFIFO && seen_S_IFIFO)
 851         fprintf (outf,
 852                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 853       if (!seen_S_ISLNK && seen_S_IFLNK)
 854         fprintf (outf,
 855                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 856       if (!seen_S_ISREG && seen_S_IFREG)
 857         fprintf (outf,
 858                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 859       break;
 860
 861     default:
 862       break;
 863     }
 864
 865 }
 866
 867 /* Returns 1 iff the file is properly protected from multiple inclusion:
 868    #ifndef PROTECT_NAME
 869    #define PROTECT_NAME
 870    #endif
 871
 872  */
 873
 874 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 875 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 876
 877 static int
 878 inf_skip_spaces (int c)
 879 {
 880   for (;;)
 881     {
 882       if (c == ' ' || c == '\t')
 883         c = INF_GET ();
 884       else if (c == '/')
 885         {
 886           c = INF_GET ();
 887           if (c != '*')
 888             {
 889               (void) INF_UNGET (c);
 890               return '/';
 891             }
 892           c = INF_GET ();
 893           for (;;)
 894             {
 895               if (c == EOF)
 896                 return EOF;
 897               else if (c != '*')
 898                 {
 899                   if (c == '\n')
 900                     source_lineno++, lineno++;
 901                   c = INF_GET ();
 902                 }
 903               else if ((c = INF_GET ()) == '/')
 904                 return INF_GET ();
 905             }
 906         }
 907       else
 908         break;
 909     }
 910   return c;
 911 }
 912
 913 /* Read into STR from inf_buffer upto DELIM.  */
 914
 915 static int
 916 inf_read_upto (sstring *str, int delim)
 917 {
 918   int ch;
 919   for (;;)
 920     {
 921       ch = INF_GET ();
 922       if (ch == EOF || ch == delim)
 923         break;
 924       SSTRING_PUT (str, ch);
 925     }
 926   MAKE_SSTRING_SPACE (str, 1);
 927   *str->ptr = 0;
 928   return ch;
 929 }
 930
 931 static int
 932 inf_scan_ident (sstring *s, 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 (int *ifndef_line, int *endif_line)
 957 {
 958   int c;
 959   int if_nesting = 1; /* Level of nesting of #if's */
 960   char *protect_name = NULL; /* Identifier following initial #ifndef */
 961   int define_seen = 0;
 962
 963   /* Skip initial white space (including comments).  */
 964   for (;; lineno++)
 965     {
 966       c = inf_skip_spaces (' ');
 967       if (c == EOF)
 968         return 0;
 969       if (c != '\n')
 970         break;
 971     }
 972   if (c != '#')
 973     return 0;
 974   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 975   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 976     return 0;
 977
 978   /* So far so good: We've seen an initial #ifndef.  */
 979   *ifndef_line = lineno;
 980   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 981   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 982     return 0;
 983   protect_name = xstrdup (buf.base);
 984
 985   (void) INF_UNGET (c);
 986   c = inf_read_upto (&buf, '\n');
 987   if (c == EOF)
 988     return 0;
 989   lineno++;
 990
 991   for (;;)
 992     {
 993       c = inf_skip_spaces (' ');
 994       if (c == EOF)
 995         return 0;
 996       if (c == '\n')
 997         {
 998           lineno++;
 999           continue;
1000         }
1001       if (c != '#')
1002         goto skip_to_eol;
1003       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1004       if (SSTRING_LENGTH (&buf) == 0)
1005         ;
1006       else if (!strcmp (buf.base, "ifndef")
1007           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1008         {
1009           if_nesting++;
1010         }
1011       else if (!strcmp (buf.base, "endif"))
1012         {
1013           if_nesting--;
1014           if (if_nesting == 0)
1015             break;
1016         }
1017       else if (!strcmp (buf.base, "else"))
1018         {
1019           if (if_nesting == 1)
1020             return 0;
1021         }
1022       else if (!strcmp (buf.base, "define"))
1023         {
1024           c = inf_skip_spaces (c);
1025           c = inf_scan_ident (&buf, c);
1026           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1027             define_seen = 1;
1028         }
1029     skip_to_eol:
1030       for (;;)
1031         {
1032           if (c == '\n' || c == EOF)
1033             break;
1034           c = INF_GET ();
1035         }
1036       if (c == EOF)
1037         return 0;
1038       lineno++;
1039     }
1040
1041   if (!define_seen)
1042      return 0;
1043   *endif_line = lineno;
1044   /* Skip final white space (including comments).  */
1045   for (;;)
1046     {
1047       c = inf_skip_spaces (' ');
1048       if (c == EOF)
1049         break;
1050       if (c != '\n')
1051         return 0;
1052     }
1053
1054   return 1;
1055 }
1056
1057 extern int main (int, char **);
1058
1059 int
1060 main (int argc, char **argv)
1061 {
1062   int inf_fd;
1063   struct stat sbuf;
1064   int c;
1065 #ifdef FIXPROTO_IGNORE_LIST
1066   int i;
1067 #endif
1068   const char *cptr;
1069   int ifndef_line;
1070   int endif_line;
1071   long to_read;
1072   long int inf_size;
1073   struct symbol_list *cur_symbols;
1074
1075   progname = "fix-header";
1076   if (argv[0] && argv[0][0])
1077     {
1078       char *p;
1079
1080       progname = 0;
1081       for (p = argv[0]; *p; p++)
1082         if (*p == '/')
1083           progname = p;
1084       progname = progname ? progname+1 : argv[0];
1085     }
1086
1087   if (argc < 4)
1088     {
1089       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1090                progname);
1091       exit (FATAL_EXIT_CODE);
1092     }
1093
1094   inc_filename = argv[1];
1095   inc_filename_length = strlen (inc_filename);
1096
1097 #ifdef FIXPROTO_IGNORE_LIST
1098   for (i = 0; files_to_ignore[i] != NULL; i++)
1099     {
1100       const char *const ignore_name = files_to_ignore[i];
1101       int ignore_len = strlen (ignore_name);
1102       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1103         {
1104           if (ignore_name[ignore_len-1] == '/'
1105               || inc_filename[ignore_len] == '\0')
1106             {
1107               if (verbose)
1108                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1109               exit (SUCCESS_EXIT_CODE);
1110             }
1111         }
1112
1113     }
1114 #endif
1115
1116   if (strcmp (inc_filename, "sys/stat.h") == 0)
1117     special_file_handling = sys_stat_h;
1118   else if (strcmp (inc_filename, "errno.h") == 0)
1119     special_file_handling = errno_h, required_other++;
1120   else if (strcmp (inc_filename, "stdlib.h") == 0)
1121     special_file_handling = stdlib_h, required_other+=2;
1122   else if (strcmp (inc_filename, "stdio.h") == 0)
1123     special_file_handling = stdio_h;
1124   include_entry = std_include_table;
1125   while (include_entry->name != NULL
1126          && ((strcmp (include_entry->name, CONTINUED) == 0)
1127              || strcmp (inc_filename, include_entry->name) != 0))
1128     include_entry++;
1129
1130   if (include_entry->name != NULL)
1131     {
1132       const struct std_include_entry *entry;
1133       cur_symbol_table_size = 0;
1134       for (entry = include_entry; ;)
1135         {
1136           if (entry->flags)
1137             add_symbols (entry->flags, entry->names);
1138           entry++;
1139           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1140             break;
1141         }
1142     }
1143   else
1144     symbol_table[0].names = NULL;
1145
1146   /* Count and mark the prototypes required for this include file.  */
1147   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1148     {
1149       int name_len;
1150       if (cur_symbols->flags & MACRO_SYMBOL)
1151         continue;
1152       cptr = cur_symbols->names;
1153       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1154         {
1155           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1156           required_unseen_count++;
1157           if (fn == NULL)
1158             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1159           else
1160             SET_REQUIRED (fn);
1161         }
1162     }
1163
1164   read_scan_file (argv[2], argc - 4, argv + 4);
1165
1166   inf_fd = open (argv[2], O_RDONLY, 0666);
1167   if (inf_fd < 0)
1168     {
1169       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1170                progname, argv[2]);
1171       perror (NULL);
1172       exit (FATAL_EXIT_CODE);
1173     }
1174   if (fstat (inf_fd, &sbuf) < 0)
1175     {
1176       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1177       perror (NULL);
1178       exit (FATAL_EXIT_CODE);
1179     }
1180   inf_size = sbuf.st_size;
1181   inf_buffer = xmalloc (inf_size + 2);
1182   inf_ptr = inf_buffer;
1183
1184   to_read = inf_size;
1185   while (to_read > 0)
1186     {
1187       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1188       if (i < 0)
1189         {
1190           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1191           perror (NULL);
1192           exit (FATAL_EXIT_CODE);
1193         }
1194       if (i == 0)
1195         {
1196           inf_size -= to_read;
1197           break;
1198         }
1199       to_read -= i;
1200     }
1201
1202   close (inf_fd);
1203
1204   /* Inf_size may have changed if read was short (as on VMS) */
1205   inf_buffer[inf_size] = '\n';
1206   inf_buffer[inf_size + 1] = '\0';
1207   inf_limit = inf_buffer + inf_size;
1208
1209   /* If file doesn't end with '\n', add one.  */
1210   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1211     inf_limit++;
1212
1213   unlink (argv[3]);
1214   outf = fopen (argv[3], "w");
1215   if (outf == NULL)
1216     {
1217       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1218                progname, argv[3]);
1219       perror (NULL);
1220       exit (FATAL_EXIT_CODE);
1221     }
1222
1223   lineno = 1;
1224
1225   if (check_protection (&ifndef_line, &endif_line))
1226     {
1227       lbrac_line = ifndef_line+1;
1228       rbrac_line = endif_line;
1229     }
1230   else
1231     {
1232       lbrac_line = 1;
1233       rbrac_line = -1;
1234     }
1235
1236   /* Reset input file.  */
1237   inf_ptr = inf_buffer;
1238   lineno = 1;
1239
1240   for (;;)
1241     {
1242       if (lineno == lbrac_line)
1243         write_lbrac ();
1244       if (lineno == rbrac_line)
1245         write_rbrac ();
1246       for (;;)
1247         {
1248           struct fn_decl *fn;
1249           c = INF_GET ();
1250           if (c == EOF)
1251             break;
1252           if (ISIDST (c))
1253             {
1254               c = inf_scan_ident (&buf, c);
1255               (void) INF_UNGET (c);
1256               fputs (buf.base, outf);
1257               fn = lookup_std_proto (buf.base, strlen (buf.base));
1258               /* We only want to edit the declaration matching the one
1259                  seen by scan-decls, as there can be multiple
1260                  declarations, selected by #ifdef __STDC__ or whatever.  */
1261               if (fn && fn->partial && fn->partial->line_seen == lineno)
1262                 {
1263                   c = inf_skip_spaces (' ');
1264                   if (c == EOF)
1265                     break;
1266                   if (c == '(')
1267                     {
1268                       c = inf_skip_spaces (' ');
1269                       if (c == ')')
1270                         {
1271                           fprintf (outf, " _PARAMS((%s))", fn->params);
1272                         }
1273                       else
1274                         {
1275                           putc ('(', outf);
1276                           (void) INF_UNGET (c);
1277                         }
1278                     }
1279                   else
1280                     fprintf (outf, " %c", c);
1281                 }
1282             }
1283           else
1284             {
1285               putc (c, outf);
1286               if (c == '\n')
1287                 break;
1288             }
1289         }
1290       if (c == EOF)
1291         break;
1292       lineno++;
1293     }
1294   if (rbrac_line < 0)
1295     write_rbrac ();
1296
1297   fclose (outf);
1298
1299   return 0;
1300 }