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
  83 static void v_fatal (const char *, va_list)
  84      ATTRIBUTE_PRINTF (1,0) ATTRIBUTE_NORETURN;
  85 static void fatal (const char *, ...) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  86
  87 #ifdef TARGET_EXTRA_INCLUDES
  88 static void hook_void_int(int u ATTRIBUTE_UNUSED) { }
  89
  90 struct target_c_incpath_s target_c_incpath = { hook_void_int };
  91 #endif
  92
  93 struct line_maps line_table;
  94
  95 sstring buf;
  96
  97 int verbose = 0;
  98 int partial_count = 0;
  99 int warnings = 0;
 100
 101 #if ADD_MISSING_EXTERN_C
 102 int missing_extern_C_count = 0;
 103 #endif
 104
 105 #include "xsys-protos.h"
 106
 107 #ifdef FIXPROTO_IGNORE_LIST
 108 /* This is a currently unused feature.  */
 109
 110 /* List of files and directories to ignore.
 111    A directory name (ending in '/') means ignore anything in that
 112    directory.  (It might be more efficient to do directory pruning
 113    earlier in fixproto, but this is simpler and easier to customize.) */
 114
 115 static const char *const files_to_ignore[] = {
 116   "X11/",
 117   FIXPROTO_IGNORE_LIST
 118   0
 119 };
 120 #endif
 121
 122 char *inf_buffer;
 123 char *inf_limit;
 124 char *inf_ptr;
 125 static const char *cur_file;
 126
 127 /* Certain standard files get extra treatment */
 128
 129 enum special_file
 130 {
 131   no_special,
 132 #ifdef errno_h
 133 #undef errno_h
 134 #endif
 135   errno_h,
 136 #ifdef stdio_h
 137 #undef stdio_h
 138 #endif
 139   stdio_h,
 140 #ifdef stdlib_h
 141 #undef stdlib_h
 142 #endif
 143   stdlib_h,
 144 #ifdef sys_stat_h
 145 #undef sys_stat_h
 146 #endif
 147   sys_stat_h
 148 };
 149
 150 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 151    by an empty name (i.e. by "\0\0").  */
 152
 153 typedef const char *namelist;
 154
 155 /* The following macros provide the bits for symbol_flags.  */
 156 typedef int symbol_flags;
 157
 158 /* Used to mark names defined in the ANSI/ISO C standard.  */
 159 #define ANSI_SYMBOL 1
 160
 161 /* We no longer massage include files for POSIX or XOPEN symbols,
 162    as there are now several versions of the POSIX and XOPEN standards,
 163    and it would be a maintenance nightmare for us to track them all.
 164    Better to be compatible with the system include files.  */
 165 /*#define ADD_MISSING_POSIX 1 */
 166 /*#define ADD_MISSING_XOPEN 1 */
 167
 168 #if ADD_MISSING_POSIX
 169 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 170 #define POSIX1_SYMBOL 2
 171 #define POSIX2_SYMBOL 4
 172 #else
 173 #define POSIX1_SYMBOL 0
 174 #define POSIX2_SYMBOL 0
 175 #endif
 176
 177 #if ADD_MISSING_XOPEN
 178 /* Used to mark names defined in X/Open Portability Guide.  */
 179 #define XOPEN_SYMBOL 8
 180 /* Used to mark names defined in X/Open UNIX Extensions.  */
 181 #define XOPEN_EXTENDED_SYMBOL 16
 182 #else
 183 #define XOPEN_SYMBOL 0
 184 #define XOPEN_EXTENDED_SYMBOL 0
 185 #endif
 186
 187 /* Used to indicate names that are not functions */
 188 #define MACRO_SYMBOL 512
 189
 190 struct symbol_list {
 191   symbol_flags flags;
 192   namelist names;
 193 };
 194
 195 #define SYMBOL_TABLE_SIZE 10
 196 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 197 int cur_symbol_table_size;
 198
 199 static void add_symbols (symbol_flags, namelist);
 200 static struct fn_decl *lookup_std_proto (const char *, int);
 201 static void write_lbrac (void);
 202 static void recognized_macro (const char *);
 203 static void check_macro_names (cpp_reader *, namelist);
 204 static void read_scan_file (char *, int, char **);
 205 static void write_rbrac (void);
 206 static int inf_skip_spaces (int);
 207 static int inf_read_upto (sstring *, int);
 208 static int inf_scan_ident (sstring *, int);
 209 static int check_protection (int *, int *);
 210 static void cb_file_change (cpp_reader *, const struct line_map *);
 211
 212 static void
 213 add_symbols (symbol_flags flags, namelist names)
 214 {
 215   symbol_table[cur_symbol_table_size].flags = flags;
 216   symbol_table[cur_symbol_table_size].names = names;
 217   cur_symbol_table_size++;
 218   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 219     fatal ("too many calls to add_symbols");
 220   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 221 }
 222
 223 struct std_include_entry {
 224   const char *const name;
 225   const symbol_flags flags;
 226   const namelist names;
 227 };
 228
 229 const char NONE[] = "";  /* The empty namelist.  */
 230
 231 /* Special name to indicate a continuation line in std_include_table.  */
 232 const char CONTINUED[] = "";
 233
 234 const struct std_include_entry *include_entry;
 235
 236 const struct std_include_entry std_include_table [] = {
 237   { "ctype.h", ANSI_SYMBOL,
 238       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 239 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 240
 241   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 242
 243   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 244
 245   /* ANSI_SYMBOL is wrong, but ...  */
 246   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 247 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 248 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 249 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 250 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 251
 252   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 253
 254   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 255   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 256
 257 /*{ "limit.h", ... provided by gcc }, */
 258
 259   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 260
 261   { "math.h", ANSI_SYMBOL,
 262       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 263 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 264 tan\0tanh\0" },
 265
 266   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 267
 268   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 269
 270   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 271   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 272
 273   /* Left out signal() - its prototype is too complex for us!
 274      Also left out "sigaction sigaddset sigdelset sigemptyset
 275      sigfillset sigismember sigpending sigprocmask sigsuspend"
 276      because these need sigset_t or struct sigaction.
 277      Most systems that provide them will also declare them.  */
 278   { "signal.h", ANSI_SYMBOL, "raise\0" },
 279   { CONTINUED, POSIX1_SYMBOL, "kill\0" },
 280
 281   { "stdio.h", ANSI_SYMBOL,
 282       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 283 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 284 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 285 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 286 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 287 tmpnam\0ungetc\0" },
 288   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 289   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 290 /* Should perhaps also handle NULL, EOF, ... ? */
 291
 292   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 293      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 294      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 295      Should perhaps also add NULL */
 296   { "stdlib.h", ANSI_SYMBOL,
 297       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 298 exit\0free\0getenv\0labs\0malloc\0qsort\0rand\0realloc\0\
 299 srand\0strtod\0strtol\0strtoul\0system\0" },
 300   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 301   { CONTINUED, POSIX1_SYMBOL, "putenv\0" },
 302
 303   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 304 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 305 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 306 strtok\0strxfrm\0" },
 307 /* Should perhaps also add NULL and size_t */
 308
 309   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 310       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 311
 312   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 313
 314   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 315      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 316      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 317   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 318
 319   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 320
 321   { "sys/stat.h", POSIX1_SYMBOL,
 322       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 323   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 324       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 325 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 326   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 327
 328 #if 0
 329 /* How do we handle fd_set? */
 330   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 331   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 332 #endif
 333
 334   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 335   /* "sys/types.h" add types (not in old g++-include) */
 336
 337   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 338
 339   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 340   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 341       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 342 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 343
 344   { "tar.h", POSIX1_SYMBOL, NONE },
 345
 346   { "termios.h", POSIX1_SYMBOL,
 347       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 348
 349   { "time.h", ANSI_SYMBOL,
 350       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0" },
 351   { CONTINUED, POSIX1_SYMBOL, "tzset\0" },
 352
 353   { "unistd.h", POSIX1_SYMBOL,
 354       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 355 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 356 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 357 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 358 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 359 ttyname\0unlink\0write\0" },
 360   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 361   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 362       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 363
 364   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 365
 366   { NULL, 0, NONE }
 367 };
 368
 369 enum special_file special_file_handling = no_special;
 370
 371 /* They are set if the corresponding macro has been seen.  */
 372 /* The following are only used when handling sys/stat.h */
 373 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 374 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 375 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 376 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 377 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 378 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 379 /* The following are only used when handling errno.h */
 380 int seen_errno = 0;
 381 /* The following are only used when handling stdlib.h */
 382 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 383 \f
 384 struct obstack scan_file_obstack;
 385
 386 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 387
 388 static struct fn_decl *
 389 lookup_std_proto (const char *name, int name_length)
 390 {
 391   int i = hashstr (name, name_length) % HASH_SIZE;
 392   int i0 = i;
 393   for (;;)
 394     {
 395       struct fn_decl *fn;
 396       if (hash_tab[i] == 0)
 397         return NULL;
 398       fn = &std_protos[hash_tab[i]];
 399       if ((int) strlen (fn->fname) == name_length
 400           && strncmp (fn->fname, name, name_length) == 0)
 401         return fn;
 402       i = (i+1) % HASH_SIZE;
 403       if (i == i0)
 404         abort ();
 405     }
 406 }
 407
 408 char *inc_filename;
 409 int inc_filename_length;
 410 const char *progname = "fix-header";
 411 FILE *outf;
 412 sstring line;
 413
 414 int lbrac_line, rbrac_line;
 415
 416 int required_unseen_count = 0;
 417 int required_other = 0;
 418
 419 static void
 420 write_lbrac (void)
 421 {
 422   if (partial_count)
 423     {
 424       fprintf (outf, "#ifndef _PARAMS\n");
 425       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 426       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 427       fprintf (outf, "#else\n");
 428       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 429       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 430     }
 431 }
 432
 433 struct partial_proto
 434 {
 435   struct partial_proto *next;
 436   struct fn_decl *fn;
 437   int line_seen;
 438 };
 439
 440 struct partial_proto *partial_proto_list = NULL;
 441
 442 struct partial_proto required_dummy_proto, seen_dummy_proto;
 443 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 444 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 445 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 446 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 447
 448 static void
 449 recognized_macro (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 (const cpp_token *name)
 499 {
 500   switch (special_file_handling)
 501     {
 502     case errno_h:
 503       if (cpp_ideq (name, "errno"))
 504         seen_errno = 1, required_other--;
 505       break;
 506
 507     default:
 508       break;
 509     }
 510 }
 511
 512 /* Called by scan_decls if it saw a function definition for a function
 513    named FNAME.  KIND is 'I' for an inline function; 'F' if a normal
 514    function declaration preceded by 'extern "C"' (or nested inside
 515    'extern "C"' braces); or 'f' for other function declarations.  */
 516
 517 void
 518 recognized_function (const cpp_token *fname, unsigned int line, int kind,
 519                      int have_arg_list)
 520 {
 521   struct partial_proto *partial;
 522   int i;
 523   struct fn_decl *fn;
 524
 525   fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
 526                          NODE_LEN (fname->val.node));
 527
 528   /* Remove the function from the list of required function.  */
 529   if (fn)
 530     {
 531       if (REQUIRED (fn))
 532         required_unseen_count--;
 533       SET_SEEN (fn);
 534     }
 535
 536   /* If we have a full prototype, we're done.  */
 537   if (have_arg_list)
 538     return;
 539
 540   if (kind == 'I')  /* don't edit inline function */
 541     return;
 542
 543   /* If the partial prototype was included from some other file,
 544      we don't need to patch it up (in this run).  */
 545   i = strlen (cur_file);
 546   if (i < inc_filename_length
 547       || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
 548     return;
 549
 550   if (fn == NULL)
 551     return;
 552   if (fn->params[0] == '\0')
 553     return;
 554
 555   /* We only have a partial function declaration,
 556      so remember that we have to add a complete prototype.  */
 557   partial_count++;
 558   partial = obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 559   partial->line_seen = line;
 560   partial->fn = fn;
 561   fn->partial = partial;
 562   partial->next = partial_proto_list;
 563   partial_proto_list = partial;
 564   if (verbose)
 565     {
 566       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 567                inc_filename, fn->fname);
 568     }
 569 }
 570
 571 /* For any name in NAMES that is defined as a macro,
 572    call recognized_macro on it.  */
 573
 574 static void
 575 check_macro_names (cpp_reader *pfile, namelist names)
 576 {
 577   size_t len;
 578   while (*names)
 579     {
 580       len = strlen (names);
 581       if (cpp_defined (pfile, (const unsigned char *)names, len))
 582         recognized_macro (names);
 583       names += len + 1;
 584     }
 585 }
 586
 587 static void
 588 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
 589                 const struct line_map *map)
 590 {
 591   /* Just keep track of current file name.  */
 592   cur_file = map == NULL ? NULL : map->to_file;
 593 }
 594
 595 static void
 596 read_scan_file (char *in_fname, int argc, char **argv)
 597 {
 598   cpp_reader *scan_in;
 599   cpp_callbacks *cb;
 600   cpp_options *options;
 601   struct fn_decl *fn;
 602   int i, strings_processed;
 603   struct symbol_list *cur_symbols;
 604
 605   obstack_init (&scan_file_obstack);
 606
 607   linemap_init (&line_table);
 608   scan_in = cpp_create_reader (CLK_GNUC89, NULL, &line_table);
 609   cb = cpp_get_callbacks (scan_in);
 610   cb->file_change = cb_file_change;
 611
 612   /* We are going to be scanning a header file out of its proper context,
 613      so ignore warnings and errors.  */
 614   options = cpp_get_options (scan_in);
 615   options->inhibit_warnings = 1;
 616   options->inhibit_errors = 1;
 617   cpp_post_options (scan_in);
 618
 619   if (!cpp_read_main_file (scan_in, in_fname))
 620     exit (FATAL_EXIT_CODE);
 621
 622   cpp_change_file (scan_in, LC_RENAME, "<built-in>");
 623   cpp_init_builtins (scan_in, true);
 624   cpp_change_file (scan_in, LC_RENAME, in_fname);
 625
 626   /* Process switches after builtins so -D can override them.  */
 627   for (i = 0; i < argc; i += strings_processed)
 628     {
 629       strings_processed = 0;
 630       if (argv[i][0] == '-')
 631         {
 632           if (argv[i][1] == 'I')
 633             {
 634               if (argv[i][2] != '\0')
 635                 {
 636                   strings_processed = 1;
 637                   add_path (xstrdup (argv[i] + 2), BRACKET, false, false);
 638                 }
 639               else if (i + 1 != argc)
 640                 {
 641                   strings_processed = 2;
 642                   add_path (xstrdup (argv[i + 1]), BRACKET, false, false);
 643                 }
 644             }
 645           else if (argv[i][1] == 'D')
 646             {
 647               if (argv[i][2] != '\0')
 648                 strings_processed = 1, cpp_define (scan_in, argv[i] + 2);
 649               else if (i + 1 != argc)
 650                 strings_processed = 2, cpp_define (scan_in, argv[i + 1]);
 651             }
 652         }
 653
 654       if (strings_processed == 0)
 655         break;
 656     }
 657
 658   if (i < argc)
 659     cpp_error (scan_in, CPP_DL_ERROR, "invalid option `%s'", argv[i]);
 660   if (cpp_errors (scan_in))
 661     exit (FATAL_EXIT_CODE);
 662
 663   register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
 664                            true /* stdinc */, false /* cxx_stdinc */,
 665                            false /* verbose */);
 666
 667   /* We are scanning a system header, so mark it as such.  */
 668   cpp_make_system_header (scan_in, 1, 0);
 669
 670   scan_decls (scan_in, argc, argv);
 671   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 672     check_macro_names (scan_in, cur_symbols->names);
 673
 674   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 675      If so, those functions are also required.  */
 676   if (special_file_handling == stdio_h
 677       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 678     {
 679       unsigned char getchar_call[] = "getchar();\n";
 680       int seen_filbuf = 0;
 681
 682       /* Scan the macro expansion of "getchar();".  */
 683       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 684                        /* from_stage3 */ true);
 685       for (;;)
 686         {
 687           const cpp_token *t = cpp_get_token (scan_in);
 688
 689           if (t->type == CPP_EOF)
 690             break;
 691           else if (cpp_ideq (t, "_filbuf"))
 692             seen_filbuf++;
 693         }
 694
 695       if (seen_filbuf)
 696         {
 697           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 698           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 699           int need_flsbuf
 700             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 701
 702           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 703           if (need_filbuf + need_flsbuf)
 704             {
 705               const char *new_list;
 706               if (need_filbuf)
 707                 SET_REQUIRED (fn);
 708               if (need_flsbuf)
 709                 SET_REQUIRED (flsbuf_fn);
 710               if (need_flsbuf && need_filbuf)
 711                 new_list = "_filbuf\0_flsbuf\0";
 712               else if (need_flsbuf)
 713                 new_list = "_flsbuf\0";
 714               else /* if (need_flsbuf) */
 715                 new_list = "_filbuf\0";
 716               add_symbols (ANSI_SYMBOL, new_list);
 717               required_unseen_count += need_filbuf + need_flsbuf;
 718             }
 719         }
 720     }
 721
 722   if (required_unseen_count + partial_count + required_other == 0)
 723     {
 724       if (verbose)
 725         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 726       exit (SUCCESS_EXIT_CODE);
 727     }
 728   if (!verbose)
 729     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 730   else
 731     {
 732       if (required_unseen_count)
 733         fprintf (stderr, "%s: %d missing function declarations.\n",
 734                  inc_filename, required_unseen_count);
 735       if (partial_count)
 736         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 737                  inc_filename, partial_count);
 738     }
 739 }
 740
 741 static void
 742 write_rbrac (void)
 743 {
 744   struct fn_decl *fn;
 745   const char *cptr;
 746   struct symbol_list *cur_symbols;
 747
 748   if (required_unseen_count)
 749     {
 750 #ifdef NO_IMPLICIT_EXTERN_C
 751       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 752 #endif
 753     }
 754
 755   /* Now we print out prototypes for those functions that we haven't seen.  */
 756   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 757     {
 758       int if_was_emitted = 0;
 759       int name_len;
 760       cptr = cur_symbols->names;
 761       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 762         {
 763           int macro_protect = 0;
 764
 765           if (cur_symbols->flags & MACRO_SYMBOL)
 766             continue;
 767
 768           fn = lookup_std_proto (cptr, name_len);
 769           if (fn == NULL || !REQUIRED (fn))
 770             continue;
 771
 772           if (!if_was_emitted)
 773             {
 774 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 775               if (cur_symbols->flags & ANSI_SYMBOL)
 776                 fprintf (outf,
 777          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 778               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 779                 fprintf (outf,
 780        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 781     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 782     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 783               else if (cur_symbols->flags & XOPEN_SYMBOL)
 784                 {
 785                 fprintf (outf,
 786        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 787    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 788                 }
 789               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 790                 {
 791                 fprintf (outf,
 792        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 793    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 794                 }
 795               else
 796                 {
 797                   fatal ("internal error for function %s", fn->fname);
 798                 }
 799               if_was_emitted = 1;
 800             }
 801
 802           /* In the case of memmove, protect in case the application
 803              defines it as a macro before including the header.  */
 804           if (!strcmp (fn->fname, "memmove")
 805               || !strcmp (fn->fname, "putc")
 806               || !strcmp (fn->fname, "getc")
 807               || !strcmp (fn->fname, "vprintf")
 808               || !strcmp (fn->fname, "vfprintf")
 809               || !strcmp (fn->fname, "vsprintf")
 810               || !strcmp (fn->fname, "rewinddir")
 811               || !strcmp (fn->fname, "abort"))
 812             macro_protect = 1;
 813
 814           if (macro_protect)
 815             fprintf (outf, "#ifndef %s\n", fn->fname);
 816           fprintf (outf, "extern %s %s (%s);\n",
 817                    fn->rtype, fn->fname, fn->params);
 818           if (macro_protect)
 819             fprintf (outf, "#endif\n");
 820         }
 821       if (if_was_emitted)
 822         fprintf (outf,
 823                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 824     }
 825   if (required_unseen_count)
 826     {
 827 #ifdef NO_IMPLICIT_EXTERN_C
 828       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 829 #endif
 830     }
 831
 832   switch (special_file_handling)
 833     {
 834     case errno_h:
 835       if (!seen_errno)
 836         fprintf (outf, "extern int errno;\n");
 837       break;
 838     case stdlib_h:
 839       if (!seen_EXIT_FAILURE)
 840         fprintf (outf, "#define EXIT_FAILURE 1\n");
 841       if (!seen_EXIT_SUCCESS)
 842         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 843       break;
 844     case sys_stat_h:
 845       if (!seen_S_ISBLK && seen_S_IFBLK)
 846         fprintf (outf,
 847                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 848       if (!seen_S_ISCHR && seen_S_IFCHR)
 849         fprintf (outf,
 850                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 851       if (!seen_S_ISDIR && seen_S_IFDIR)
 852         fprintf (outf,
 853                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 854       if (!seen_S_ISFIFO && seen_S_IFIFO)
 855         fprintf (outf,
 856                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 857       if (!seen_S_ISLNK && seen_S_IFLNK)
 858         fprintf (outf,
 859                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 860       if (!seen_S_ISREG && seen_S_IFREG)
 861         fprintf (outf,
 862                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 863       break;
 864
 865     default:
 866       break;
 867     }
 868
 869 }
 870
 871 /* Returns 1 iff the file is properly protected from multiple inclusion:
 872    #ifndef PROTECT_NAME
 873    #define PROTECT_NAME
 874    #endif
 875
 876  */
 877
 878 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 879 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 880
 881 static int
 882 inf_skip_spaces (int c)
 883 {
 884   for (;;)
 885     {
 886       if (c == ' ' || c == '\t')
 887         c = INF_GET ();
 888       else if (c == '/')
 889         {
 890           c = INF_GET ();
 891           if (c != '*')
 892             {
 893               (void) INF_UNGET (c);
 894               return '/';
 895             }
 896           c = INF_GET ();
 897           for (;;)
 898             {
 899               if (c == EOF)
 900                 return EOF;
 901               else if (c != '*')
 902                 {
 903                   if (c == '\n')
 904                     source_lineno++, lineno++;
 905                   c = INF_GET ();
 906                 }
 907               else if ((c = INF_GET ()) == '/')
 908                 return INF_GET ();
 909             }
 910         }
 911       else
 912         break;
 913     }
 914   return c;
 915 }
 916
 917 /* Read into STR from inf_buffer upto DELIM.  */
 918
 919 static int
 920 inf_read_upto (sstring *str, int delim)
 921 {
 922   int ch;
 923   for (;;)
 924     {
 925       ch = INF_GET ();
 926       if (ch == EOF || ch == delim)
 927         break;
 928       SSTRING_PUT (str, ch);
 929     }
 930   MAKE_SSTRING_SPACE (str, 1);
 931   *str->ptr = 0;
 932   return ch;
 933 }
 934
 935 static int
 936 inf_scan_ident (sstring *s, int c)
 937 {
 938   s->ptr = s->base;
 939   if (ISIDST (c))
 940     {
 941       for (;;)
 942         {
 943           SSTRING_PUT (s, c);
 944           c = INF_GET ();
 945           if (c == EOF || !(ISIDNUM (c)))
 946             break;
 947         }
 948     }
 949   MAKE_SSTRING_SPACE (s, 1);
 950   *s->ptr = 0;
 951   return c;
 952 }
 953
 954 /* Returns 1 if the file is correctly protected against multiple
 955    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 956    and setting *endif_line to the final #endif.
 957    Otherwise return 0.  */
 958
 959 static int
 960 check_protection (int *ifndef_line, int *endif_line)
 961 {
 962   int c;
 963   int if_nesting = 1; /* Level of nesting of #if's */
 964   char *protect_name = NULL; /* Identifier following initial #ifndef */
 965   int define_seen = 0;
 966
 967   /* Skip initial white space (including comments).  */
 968   for (;; lineno++)
 969     {
 970       c = inf_skip_spaces (' ');
 971       if (c == EOF)
 972         return 0;
 973       if (c != '\n')
 974         break;
 975     }
 976   if (c != '#')
 977     return 0;
 978   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 979   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 980     return 0;
 981
 982   /* So far so good: We've seen an initial #ifndef.  */
 983   *ifndef_line = lineno;
 984   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 985   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 986     return 0;
 987   protect_name = xstrdup (buf.base);
 988
 989   (void) INF_UNGET (c);
 990   c = inf_read_upto (&buf, '\n');
 991   if (c == EOF)
 992     return 0;
 993   lineno++;
 994
 995   for (;;)
 996     {
 997       c = inf_skip_spaces (' ');
 998       if (c == EOF)
 999         return 0;
1000       if (c == '\n')
1001         {
1002           lineno++;
1003           continue;
1004         }
1005       if (c != '#')
1006         goto skip_to_eol;
1007       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1008       if (SSTRING_LENGTH (&buf) == 0)
1009         ;
1010       else if (!strcmp (buf.base, "ifndef")
1011           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1012         {
1013           if_nesting++;
1014         }
1015       else if (!strcmp (buf.base, "endif"))
1016         {
1017           if_nesting--;
1018           if (if_nesting == 0)
1019             break;
1020         }
1021       else if (!strcmp (buf.base, "else"))
1022         {
1023           if (if_nesting == 1)
1024             return 0;
1025         }
1026       else if (!strcmp (buf.base, "define"))
1027         {
1028           c = inf_skip_spaces (c);
1029           c = inf_scan_ident (&buf, c);
1030           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1031             define_seen = 1;
1032         }
1033     skip_to_eol:
1034       for (;;)
1035         {
1036           if (c == '\n' || c == EOF)
1037             break;
1038           c = INF_GET ();
1039         }
1040       if (c == EOF)
1041         return 0;
1042       lineno++;
1043     }
1044
1045   if (!define_seen)
1046      return 0;
1047   *endif_line = lineno;
1048   /* Skip final white space (including comments).  */
1049   for (;;)
1050     {
1051       c = inf_skip_spaces (' ');
1052       if (c == EOF)
1053         break;
1054       if (c != '\n')
1055         return 0;
1056     }
1057
1058   return 1;
1059 }
1060
1061 extern int main (int, char **);
1062
1063 int
1064 main (int argc, char **argv)
1065 {
1066   int inf_fd;
1067   struct stat sbuf;
1068   int c;
1069 #ifdef FIXPROTO_IGNORE_LIST
1070   int i;
1071 #endif
1072   const char *cptr;
1073   int ifndef_line;
1074   int endif_line;
1075   long to_read;
1076   long int inf_size;
1077   struct symbol_list *cur_symbols;
1078
1079   if (argv[0] && argv[0][0])
1080     {
1081       char *p;
1082
1083       progname = 0;
1084       for (p = argv[0]; *p; p++)
1085         if (*p == '/')
1086           progname = p;
1087       progname = progname ? progname+1 : argv[0];
1088     }
1089
1090   if (argc < 4)
1091     {
1092       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1093                progname);
1094       exit (FATAL_EXIT_CODE);
1095     }
1096
1097   inc_filename = argv[1];
1098   inc_filename_length = strlen (inc_filename);
1099
1100 #ifdef FIXPROTO_IGNORE_LIST
1101   for (i = 0; files_to_ignore[i] != NULL; i++)
1102     {
1103       const char *const ignore_name = files_to_ignore[i];
1104       int ignore_len = strlen (ignore_name);
1105       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1106         {
1107           if (ignore_name[ignore_len-1] == '/'
1108               || inc_filename[ignore_len] == '\0')
1109             {
1110               if (verbose)
1111                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1112               exit (SUCCESS_EXIT_CODE);
1113             }
1114         }
1115
1116     }
1117 #endif
1118
1119   if (strcmp (inc_filename, "sys/stat.h") == 0)
1120     special_file_handling = sys_stat_h;
1121   else if (strcmp (inc_filename, "errno.h") == 0)
1122     special_file_handling = errno_h, required_other++;
1123   else if (strcmp (inc_filename, "stdlib.h") == 0)
1124     special_file_handling = stdlib_h, required_other+=2;
1125   else if (strcmp (inc_filename, "stdio.h") == 0)
1126     special_file_handling = stdio_h;
1127   include_entry = std_include_table;
1128   while (include_entry->name != NULL
1129          && ((strcmp (include_entry->name, CONTINUED) == 0)
1130              || strcmp (inc_filename, include_entry->name) != 0))
1131     include_entry++;
1132
1133   if (include_entry->name != NULL)
1134     {
1135       const struct std_include_entry *entry;
1136       cur_symbol_table_size = 0;
1137       for (entry = include_entry; ;)
1138         {
1139           if (entry->flags)
1140             add_symbols (entry->flags, entry->names);
1141           entry++;
1142           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1143             break;
1144         }
1145     }
1146   else
1147     symbol_table[0].names = NULL;
1148
1149   /* Count and mark the prototypes required for this include file.  */
1150   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1151     {
1152       int name_len;
1153       if (cur_symbols->flags & MACRO_SYMBOL)
1154         continue;
1155       cptr = cur_symbols->names;
1156       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1157         {
1158           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1159           required_unseen_count++;
1160           if (fn == NULL)
1161             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1162           else
1163             SET_REQUIRED (fn);
1164         }
1165     }
1166
1167   read_scan_file (argv[2], argc - 4, argv + 4);
1168
1169   inf_fd = open (argv[2], O_RDONLY, 0666);
1170   if (inf_fd < 0)
1171     {
1172       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1173                progname, argv[2]);
1174       perror (NULL);
1175       exit (FATAL_EXIT_CODE);
1176     }
1177   if (fstat (inf_fd, &sbuf) < 0)
1178     {
1179       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1180       perror (NULL);
1181       exit (FATAL_EXIT_CODE);
1182     }
1183   inf_size = sbuf.st_size;
1184   inf_buffer = xmalloc (inf_size + 2);
1185   inf_ptr = inf_buffer;
1186
1187   to_read = inf_size;
1188   while (to_read > 0)
1189     {
1190       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1191       if (i < 0)
1192         {
1193           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1194           perror (NULL);
1195           exit (FATAL_EXIT_CODE);
1196         }
1197       if (i == 0)
1198         {
1199           inf_size -= to_read;
1200           break;
1201         }
1202       to_read -= i;
1203     }
1204
1205   close (inf_fd);
1206
1207   /* Inf_size may have changed if read was short (as on VMS) */
1208   inf_buffer[inf_size] = '\n';
1209   inf_buffer[inf_size + 1] = '\0';
1210   inf_limit = inf_buffer + inf_size;
1211
1212   /* If file doesn't end with '\n', add one.  */
1213   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1214     inf_limit++;
1215
1216   unlink (argv[3]);
1217   outf = fopen (argv[3], "w");
1218   if (outf == NULL)
1219     {
1220       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1221                progname, argv[3]);
1222       perror (NULL);
1223       exit (FATAL_EXIT_CODE);
1224     }
1225
1226   lineno = 1;
1227
1228   if (check_protection (&ifndef_line, &endif_line))
1229     {
1230       lbrac_line = ifndef_line+1;
1231       rbrac_line = endif_line;
1232     }
1233   else
1234     {
1235       lbrac_line = 1;
1236       rbrac_line = -1;
1237     }
1238
1239   /* Reset input file.  */
1240   inf_ptr = inf_buffer;
1241   lineno = 1;
1242
1243   for (;;)
1244     {
1245       if (lineno == lbrac_line)
1246         write_lbrac ();
1247       if (lineno == rbrac_line)
1248         write_rbrac ();
1249       for (;;)
1250         {
1251           struct fn_decl *fn;
1252           c = INF_GET ();
1253           if (c == EOF)
1254             break;
1255           if (ISIDST (c))
1256             {
1257               c = inf_scan_ident (&buf, c);
1258               (void) INF_UNGET (c);
1259               fputs (buf.base, outf);
1260               fn = lookup_std_proto (buf.base, strlen (buf.base));
1261               /* We only want to edit the declaration matching the one
1262                  seen by scan-decls, as there can be multiple
1263                  declarations, selected by #ifdef __STDC__ or whatever.  */
1264               if (fn && fn->partial && fn->partial->line_seen == lineno)
1265                 {
1266                   c = inf_skip_spaces (' ');
1267                   if (c == EOF)
1268                     break;
1269                   if (c == '(')
1270                     {
1271                       c = inf_skip_spaces (' ');
1272                       if (c == ')')
1273                         {
1274                           fprintf (outf, " _PARAMS((%s))", fn->params);
1275                         }
1276                       else
1277                         {
1278                           putc ('(', outf);
1279                           (void) INF_UNGET (c);
1280                         }
1281                     }
1282                   else
1283                     fprintf (outf, " %c", c);
1284                 }
1285             }
1286           else
1287             {
1288               putc (c, outf);
1289               if (c == '\n')
1290                 break;
1291             }
1292         }
1293       if (c == EOF)
1294         break;
1295       lineno++;
1296     }
1297   if (rbrac_line < 0)
1298     write_rbrac ();
1299
1300   fclose (outf);
1301
1302   return 0;
1303 }
1304 \f
1305
1306 static void
1307 v_fatal (const char *str, va_list ap)
1308 {
1309   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1310   vfprintf (stderr, str, ap);
1311   fprintf (stderr, "\n");
1312
1313   exit (FATAL_EXIT_CODE);
1314 }
1315
1316 static void
1317 fatal (const char *str, ...)
1318 {
1319   va_list ap;
1320
1321   va_start (ap, str);
1322   v_fatal (str, ap);
1323   va_end (ap);
1324 }