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