gcc/fix-header.c

   1 /* fix-header.c - Make C header file suitable for C++.
   2    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000 Free Software Foundation, Inc.
   4
   5 This program is free software; you can redistribute it and/or modify it
   6 under the terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option) any
   8 later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 /* This program massages a system include file (such as stdio.h),
  20    into a form that is compatible with GNU C and GNU C++.
  21
  22    * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
  23    if they seem to be needed.  These prevent C++ compilers from name
  24    mangling the functions inside the braces.
  25
  26    * If an old-style incomplete function declaration is seen (without
  27    an argument list), and it is a "standard" function listed in
  28    the file sys-protos.h (and with a non-empty argument list), then
  29    the declaration is converted to a complete prototype by replacing
  30    the empty parameter list with the argument list from sys-protos.h.
  31
  32    * The program can be given a list of (names of) required standard
  33    functions (such as fclose for stdio.h).  If a required function
  34    is not seen in the input, then a prototype for it will be
  35    written to the output.
  36
  37    * If all of the non-comment code of the original file is protected
  38    against multiple inclusion:
  39         #ifndef FOO
  40         #define FOO
  41         <body of include file>
  42         #endif
  43    then extra matter added to the include file is placed inside the <body>.
  44
  45    * If the input file is OK (nothing needs to be done);
  46    the output file is not written (nor removed if it exists).
  47
  48    There are also some special actions that are done for certain
  49    well-known standard include files:
  50
  51    * If argv[1] is "sys/stat.h", the Posix.1 macros
  52    S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
  53    they were missing, and the corresponding "traditional" S_IFxxx
  54    macros were defined.
  55
  56    * If argv[1] is "errno.h", errno is declared if it was missing.
  57
  58    * TODO:  The input file should be read complete into memory, because:
  59    a) it needs to be scanned twice anyway, and
  60    b) it would be nice to allow update in place.
  61
  62    Usage:
  63         fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
  64    where:
  65    * FOO.H is the relative file name of the include file,
  66    as it would be #include'd by a C file.  (E.g. stdio.h)
  67    * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
  68    * OUTFILE.H is the full pathname for where to write the output file,
  69    if anything needs to be done.  (e.g. ./include/stdio.h)
  70    * OPTIONS are such as you would pass to cpp.
  71
  72    Written by Per Bothner <bothner@cygnus.com>, July 1993.  */
  73
  74 #include "hconfig.h"
  75 #include "system.h"
  76 #include "obstack.h"
  77 #include "scan.h"
  78 #include "cpplib.h"
  79
  80 static void v_fatal PARAMS ((const char *, va_list)) ATTRIBUTE_NORETURN;
  81 static void fatal PARAMS ((const char *, ...)) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  82
  83 sstring buf;
  84
  85 int verbose = 0;
  86 int partial_count = 0;
  87 int warnings = 0;
  88
  89 /* We no longer need to add extern "C", because cpp implicitly
  90    forces the standard include files to be treated as C.  */
  91 /*#define ADD_MISSING_EXTERN_C 1 */
  92
  93 #if ADD_MISSING_EXTERN_C
  94 int missing_extern_C_count = 0;
  95 #endif
  96
  97 #include "xsys-protos.h"
  98
  99 #ifdef FIXPROTO_IGNORE_LIST
 100 /* This is a currently unused feature.  */
 101
 102 /* List of files and directories to ignore.
 103    A directory name (ending in '/') means ignore anything in that
 104    directory.  (It might be more efficient to do directory pruning
 105    earlier in fixproto, but this is simpler and easier to customize.) */
 106
 107 static char *files_to_ignore[] = {
 108   "X11/",
 109   FIXPROTO_IGNORE_LIST
 110   0
 111 };
 112 #endif
 113
 114 char *inf_buffer;
 115 char *inf_limit;
 116 char *inf_ptr;
 117
 118 /* Certain standard files get extra treatment */
 119
 120 enum special_file
 121 {
 122   no_special,
 123 #ifdef errno_h
 124 #undef errno_h
 125 #endif
 126   errno_h,
 127 #ifdef stdio_h
 128 #undef stdio_h
 129 #endif
 130   stdio_h,
 131 #ifdef stdlib_h
 132 #undef stdlib_h
 133 #endif
 134   stdlib_h,
 135 #ifdef sys_stat_h
 136 #undef sys_stat_h
 137 #endif
 138   sys_stat_h
 139 };
 140
 141 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 142    by an empty name (i.e. by "\0\0").  */
 143
 144 typedef const char *namelist;
 145
 146 /* The following macros provide the bits for symbol_flags.  */
 147 typedef int symbol_flags;
 148
 149 /* Used to mark names defined in the ANSI/ISO C standard.  */
 150 #define ANSI_SYMBOL 1
 151
 152 /* We no longer massage include files for POSIX or XOPEN symbols,
 153    as there are now several versions of the POSIX and XOPEN standards,
 154    and it would be a maintenance nightmare for us to track them all.
 155    Better to be compatible with the system include files.  */
 156 /*#define ADD_MISSING_POSIX 1 */
 157 /*#define ADD_MISSING_XOPEN 1 */
 158
 159 #if ADD_MISSING_POSIX
 160 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 161 #define POSIX1_SYMBOL 2
 162 #define POSIX2_SYMBOL 4
 163 #else
 164 #define POSIX1_SYMBOL 0
 165 #define POSIX2_SYMBOL 0
 166 #endif
 167
 168 #if ADD_MISSING_XOPEN
 169 /* Used to mark names defined in X/Open Portability Guide.  */
 170 #define XOPEN_SYMBOL 8
 171 /* Used to mark names defined in X/Open UNIX Extensions.  */
 172 #define XOPEN_EXTENDED_SYMBOL 16
 173 #else
 174 #define XOPEN_SYMBOL 0
 175 #define XOPEN_EXTENDED_SYMBOL 0
 176 #endif
 177
 178 /* Used to indicate names that are not functions */
 179 #define MACRO_SYMBOL 512
 180
 181 struct symbol_list {
 182   symbol_flags flags;
 183   namelist names;
 184 };
 185
 186 #define SYMBOL_TABLE_SIZE 10
 187 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 188 int cur_symbol_table_size;
 189
 190 static void add_symbols PARAMS ((symbol_flags, namelist));
 191 static struct fn_decl *lookup_std_proto PARAMS ((const char *, int));
 192 static void write_lbrac PARAMS ((void));
 193 static void recognized_macro PARAMS ((const char *));
 194 static void check_macro_names PARAMS ((cpp_reader *, namelist));
 195 static void read_scan_file PARAMS ((char *, int, char **));
 196 static void write_rbrac PARAMS ((void));
 197 static int inf_skip_spaces PARAMS ((int));
 198 static int inf_read_upto PARAMS ((sstring *, int));
 199 static int inf_scan_ident PARAMS ((sstring *, int));
 200 static int check_protection PARAMS ((int *, int *));
 201
 202 static void
 203 add_symbols (flags, names)
 204      symbol_flags flags;
 205      namelist names;
 206 {
 207   symbol_table[cur_symbol_table_size].flags = flags;
 208   symbol_table[cur_symbol_table_size].names = names;
 209   cur_symbol_table_size++;
 210   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 211     fatal ("too many calls to add_symbols");
 212   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 213 }
 214
 215 struct std_include_entry {
 216   const char *name;
 217   symbol_flags flags;
 218   namelist names;
 219 };
 220
 221 const char NONE[] = "";  /* The empty namelist.  */
 222
 223 /* Special name to indicate a continuation line in std_include_table.  */
 224 const char CONTINUED[] = "";
 225
 226 struct std_include_entry *include_entry;
 227
 228 struct std_include_entry std_include_table [] = {
 229   { "ctype.h", ANSI_SYMBOL,
 230       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 231 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 232
 233   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 234
 235   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 236
 237   /* ANSI_SYMBOL is wrong, but ...  */
 238   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 239 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 240 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 241 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 242 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 243
 244   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 245
 246   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 247   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 248
 249 /*{ "limit.h", ... provided by gcc }, */
 250
 251   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 252
 253   { "math.h", ANSI_SYMBOL,
 254       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 255 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 256 tan\0tanh\0" },
 257
 258   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 259
 260   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 261
 262   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 263   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 264
 265   /* Left out signal() - its prototype is too complex for us!
 266      Also left out "sigaction sigaddset sigdelset sigemptyset
 267      sigfillset sigismember sigpending sigprocmask sigsuspend"
 268      because these need sigset_t or struct sigaction.
 269      Most systems that provide them will also declare them.  */
 270   { "signal.h", ANSI_SYMBOL, "kill\0raise\0" },
 271
 272   { "stdio.h", ANSI_SYMBOL,
 273       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 274 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 275 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 276 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 277 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 278 tmpnam\0ungetc\0" },
 279   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 280   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 281 /* Should perhaps also handle NULL, EOF, ... ? */
 282
 283   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 284      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 285      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 286      Should perhaps also add NULL */
 287   { "stdlib.h", ANSI_SYMBOL,
 288       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 289 exit\0free\0getenv\0labs\0malloc\0putenv\0qsort\0rand\0realloc\0\
 290 srand\0strtod\0strtol\0strtoul\0system\0" },
 291   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 292
 293   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 294 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 295 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 296 strtok\0strxfrm\0" },
 297 /* Should perhaps also add NULL and size_t */
 298
 299   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 300       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 301
 302   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 303
 304   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 305      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 306      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 307   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 308
 309   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 310
 311   { "sys/stat.h", POSIX1_SYMBOL,
 312       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 313   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 314       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 315 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 316   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 317
 318 #if 0
 319 /* How do we handle fd_set? */
 320   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 321   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 322 #endif
 323
 324   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 325   /* "sys/types.h" add types (not in old g++-include) */
 326
 327   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 328
 329   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 330   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 331       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 332 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 333
 334   { "tar.h", POSIX1_SYMBOL, NONE },
 335
 336   { "termios.h", POSIX1_SYMBOL,
 337       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 338
 339   { "time.h", ANSI_SYMBOL,
 340       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0tzset\0" },
 341
 342   { "unistd.h", POSIX1_SYMBOL,
 343       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 344 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 345 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 346 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 347 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 348 ttyname\0unlink\0write\0" },
 349   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 350   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 351       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 352
 353   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 354
 355   { NULL, 0, NONE }
 356 };
 357
 358 enum special_file special_file_handling = no_special;
 359
 360 /* They are set if the corresponding macro has been seen.  */
 361 /* The following are only used when handling sys/stat.h */
 362 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 363 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 364 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 365 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 366 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 367 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 368 /* The following are only used when handling errno.h */
 369 int seen_errno = 0;
 370 /* The following are only used when handling stdlib.h */
 371 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 372 \f
 373 #define obstack_chunk_alloc xmalloc
 374 #define obstack_chunk_free free
 375 struct obstack scan_file_obstack;
 376
 377 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 378
 379 static struct fn_decl *
 380 lookup_std_proto (name, name_length)
 381      const char *name;
 382      int name_length;
 383 {
 384   int i = hashstr (name, name_length) % HASH_SIZE;
 385   int i0 = i;
 386   for (;;)
 387     {
 388       struct fn_decl *fn;
 389       if (hash_tab[i] == 0)
 390         return NULL;
 391       fn = &std_protos[hash_tab[i]];
 392       if ((int) strlen (fn->fname) == name_length
 393           && strncmp (fn->fname, name, name_length) == 0)
 394         return fn;
 395       i = (i+1) % HASH_SIZE;
 396       if (i == i0)
 397         abort ();
 398     }
 399 }
 400
 401 char *inc_filename;
 402 int inc_filename_length;
 403 const char *progname = "fix-header";
 404 FILE *outf;
 405 sstring line;
 406
 407 int lbrac_line, rbrac_line;
 408
 409 int required_unseen_count = 0;
 410 int required_other = 0;
 411
 412 static void
 413 write_lbrac ()
 414 {
 415
 416 #if ADD_MISSING_EXTERN_C
 417   if (missing_extern_C_count + required_unseen_count > 0)
 418     fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 419 #endif
 420
 421   if (partial_count)
 422     {
 423       fprintf (outf, "#ifndef _PARAMS\n");
 424       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 425       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 426       fprintf (outf, "#else\n");
 427       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 428       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 429     }
 430 }
 431
 432 struct partial_proto
 433 {
 434   struct partial_proto *next;
 435   struct fn_decl *fn;
 436   int line_seen;
 437 };
 438
 439 struct partial_proto *partial_proto_list = NULL;
 440
 441 struct partial_proto required_dummy_proto, seen_dummy_proto;
 442 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 443 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 444 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 445 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 446
 447 static void
 448 recognized_macro (fname)
 449      const char *fname;
 450 {
 451   /* The original include file defines fname as a macro.  */
 452   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 453
 454   /* Since fname is a macro, don't require a prototype for it.  */
 455   if (fn)
 456     {
 457       if (REQUIRED (fn))
 458         required_unseen_count--;
 459       SET_SEEN (fn);
 460     }
 461
 462   switch (special_file_handling)
 463     {
 464     case errno_h:
 465       if (strcmp (fname, "errno") == 0 && !seen_errno)
 466         seen_errno = 1, required_other--;
 467       break;
 468     case stdlib_h:
 469       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 470         seen_EXIT_FAILURE = 1, required_other--;
 471       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 472         seen_EXIT_SUCCESS = 1, required_other--;
 473       break;
 474     case sys_stat_h:
 475       if (fname[0] == 'S' && fname[1] == '_')
 476         {
 477           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 478           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 479           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 480           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 481           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 482           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 483           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 484           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 485           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 486           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 487           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 488           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 489         }
 490       break;
 491
 492     default:
 493       break;
 494     }
 495 }
 496
 497 void
 498 recognized_extern (name)
 499      const cpp_token *name;
 500 {
 501   switch (special_file_handling)
 502     {
 503     case errno_h:
 504       if (cpp_ideq (name, "errno"))
 505         seen_errno = 1, required_other--;
 506       break;
 507
 508     default:
 509       break;
 510     }
 511 }
 512
 513 /* Called by scan_decls if it saw a function definition for a function
 514    named FNAME, in source file FILE_SEEN on line LINE_SEEN.  KIND is
 515    'I' for an inline function; 'F' if a normal function declaration
 516    preceded by 'extern "C"' (or nested inside 'extern "C"' braces); or
 517    'f' for other function declarations.  */
 518
 519 void
 520 recognized_function (fname, line, kind, have_arg_list, file_seen)
 521      const cpp_token *fname;
 522      unsigned int line;
 523      int kind; /* One of 'f' 'F' or 'I' */
 524      int have_arg_list;
 525      const char *file_seen;
 526 {
 527   struct partial_proto *partial;
 528   int i;
 529   struct fn_decl *fn;
 530 #if ADD_MISSING_EXTERN_C
 531   if (kind == 'f')
 532     missing_extern_C_count++;
 533 #endif
 534
 535   fn = lookup_std_proto ((const char *)fname->val.node->name,
 536                          fname->val.node->length);
 537
 538   /* Remove the function from the list of required function.  */
 539   if (fn)
 540     {
 541       if (REQUIRED (fn))
 542         required_unseen_count--;
 543       SET_SEEN (fn);
 544     }
 545
 546   /* If we have a full prototype, we're done.  */
 547   if (have_arg_list)
 548     return;
 549
 550   if (kind == 'I')  /* don't edit inline function */
 551     return;
 552
 553   /* If the partial prototype was included from some other file,
 554      we don't need to patch it up (in this run).  */
 555   i = strlen (file_seen);
 556   if (i < inc_filename_length
 557       || strcmp (inc_filename, file_seen + (i - inc_filename_length)) != 0)
 558     return;
 559
 560   if (fn == NULL)
 561     return;
 562   if (fn->params[0] == '\0')
 563     return;
 564
 565   /* We only have a partial function declaration,
 566      so remember that we have to add a complete prototype.  */
 567   partial_count++;
 568   partial = (struct partial_proto *)
 569     obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 570   partial->line_seen = line;
 571   partial->fn = fn;
 572   fn->partial = partial;
 573   partial->next = partial_proto_list;
 574   partial_proto_list = partial;
 575   if (verbose)
 576     {
 577       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 578                inc_filename, fn->fname);
 579     }
 580 }
 581
 582 /* For any name in NAMES that is defined as a macro,
 583    call recognized_macro on it.  */
 584
 585 static void
 586 check_macro_names (pfile, names)
 587      cpp_reader *pfile;
 588      namelist names;
 589 {
 590   size_t len;
 591   while (*names)
 592     {
 593       len = strlen (names);
 594       if (cpp_defined (pfile, (const unsigned char *)names, len))
 595         recognized_macro (names);
 596       names += len + 1;
 597     }
 598 }
 599
 600 static void
 601 read_scan_file (in_fname, argc, argv)
 602      char *in_fname;
 603      int argc;
 604      char **argv;
 605 {
 606   cpp_reader scan_in;
 607   struct fn_decl *fn;
 608   int i;
 609   register struct symbol_list *cur_symbols;
 610
 611   obstack_init (&scan_file_obstack);
 612
 613   cpp_init ();                  /* Initialize cpplib.   */
 614   cpp_reader_init (&scan_in);
 615
 616   /* We are going to be scanning a header file out of its proper context,
 617      so ignore warnings and errors.  */
 618   CPP_OPTION (&scan_in, inhibit_warnings) = 1;
 619   CPP_OPTION (&scan_in, inhibit_errors) = 1;
 620   i = cpp_handle_options (&scan_in, argc, argv);
 621   if (i < argc && ! CPP_FATAL_ERRORS (&scan_in))
 622     cpp_fatal (&scan_in, "Invalid option `%s'", argv[i]);
 623   if (CPP_FATAL_ERRORS (&scan_in))
 624     exit (FATAL_EXIT_CODE);
 625
 626   if (! cpp_start_read (&scan_in, in_fname))
 627     exit (FATAL_EXIT_CODE);
 628
 629   /* We are scanning a system header, so mark it as such.  */
 630   cpp_make_system_header (&scan_in, CPP_BUFFER (&scan_in), 1);
 631
 632   scan_decls (&scan_in, argc, argv);
 633   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 634     check_macro_names (&scan_in, cur_symbols->names);
 635
 636   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 637      If so, those functions are also required.  */
 638   if (special_file_handling == stdio_h
 639       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 640     {
 641       static const unsigned char getchar_call[] = "getchar();";
 642       int seen_filbuf = 0;
 643       cpp_buffer *buf = CPP_BUFFER (&scan_in);
 644       if (cpp_push_buffer (&scan_in, getchar_call,
 645                            sizeof(getchar_call) - 1) == NULL)
 646         return;
 647
 648       /* Scan the macro expansion of "getchar();".  */
 649       for (;;)
 650         {
 651           cpp_token t;
 652
 653           cpp_get_token (&scan_in, &t);
 654           if (t.type == CPP_EOF)
 655             {
 656               cpp_pop_buffer (&scan_in);
 657               if (CPP_BUFFER (&scan_in) == buf)
 658                 break;
 659             }
 660           else if (cpp_ideq (&t, "_filbuf"))
 661             seen_filbuf++;
 662         }
 663       if (seen_filbuf)
 664         {
 665           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 666           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 667           int need_flsbuf
 668             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 669
 670           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 671           if (need_filbuf + need_flsbuf)
 672             {
 673               const char *new_list;
 674               if (need_filbuf)
 675                 SET_REQUIRED (fn);
 676               if (need_flsbuf)
 677                 SET_REQUIRED (flsbuf_fn);
 678               if (need_flsbuf && need_filbuf)
 679                 new_list = "_filbuf\0_flsbuf\0";
 680               else if (need_flsbuf)
 681                 new_list = "_flsbuf\0";
 682               else /* if (need_flsbuf) */
 683                 new_list = "_filbuf\0";
 684               add_symbols (ANSI_SYMBOL, new_list);
 685               required_unseen_count += need_filbuf + need_flsbuf;
 686             }
 687         }
 688     }
 689
 690   if (required_unseen_count + partial_count + required_other
 691 #if ADD_MISSING_EXTERN_C
 692       + missing_extern_C_count
 693 #endif
 694       == 0)
 695     {
 696       if (verbose)
 697         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 698       exit (SUCCESS_EXIT_CODE);
 699     }
 700   if (!verbose)
 701     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 702   else
 703     {
 704       if (required_unseen_count)
 705         fprintf (stderr, "%s: %d missing function declarations.\n",
 706                  inc_filename, required_unseen_count);
 707       if (partial_count)
 708         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 709                  inc_filename, partial_count);
 710 #if ADD_MISSING_EXTERN_C
 711       if (missing_extern_C_count)
 712         fprintf (stderr,
 713                  "%s: %d declarations not protected by extern \"C\".\n",
 714                  inc_filename, missing_extern_C_count);
 715 #endif
 716     }
 717 }
 718
 719 static void
 720 write_rbrac ()
 721 {
 722   struct fn_decl *fn;
 723   const char *cptr;
 724   register struct symbol_list *cur_symbols;
 725
 726   if (required_unseen_count)
 727     {
 728 #ifdef NO_IMPLICIT_EXTERN_C
 729       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 730 #endif
 731     }
 732
 733   /* Now we print out prototypes for those functions that we haven't seen.  */
 734   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 735     {
 736       int if_was_emitted = 0;
 737       int name_len;
 738       cptr = cur_symbols->names;
 739       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 740         {
 741           int macro_protect = 0;
 742
 743           if (cur_symbols->flags & MACRO_SYMBOL)
 744             continue;
 745
 746           fn = lookup_std_proto (cptr, name_len);
 747           if (fn == NULL || !REQUIRED (fn))
 748             continue;
 749
 750           if (!if_was_emitted)
 751             {
 752 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 753               if (cur_symbols->flags & ANSI_SYMBOL)
 754                 fprintf (outf,
 755          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 756               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 757                 fprintf (outf,
 758        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 759     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 760     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 761               else if (cur_symbols->flags & XOPEN_SYMBOL)
 762                 {
 763                 fprintf (outf,
 764        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 765    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 766                 }
 767               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 768                 {
 769                 fprintf (outf,
 770        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 771    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 772                 }
 773               else
 774                 {
 775                   fatal ("internal error for function %s", fn->fname);
 776                 }
 777               if_was_emitted = 1;
 778             }
 779
 780           /* In the case of memmove, protect in case the application
 781              defines it as a macro before including the header.  */
 782           if (!strcmp (fn->fname, "memmove")
 783               || !strcmp (fn->fname, "putc")
 784               || !strcmp (fn->fname, "getc")
 785               || !strcmp (fn->fname, "vprintf")
 786               || !strcmp (fn->fname, "vfprintf")
 787               || !strcmp (fn->fname, "vsprintf")
 788               || !strcmp (fn->fname, "rewinddir")
 789               || !strcmp (fn->fname, "abort"))
 790             macro_protect = 1;
 791
 792           if (macro_protect)
 793             fprintf (outf, "#ifndef %s\n", fn->fname);
 794           fprintf (outf, "extern %s %s (%s);\n",
 795                    fn->rtype, fn->fname, fn->params);
 796           if (macro_protect)
 797             fprintf (outf, "#endif\n");
 798         }
 799       if (if_was_emitted)
 800         fprintf (outf,
 801                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 802     }
 803   if (required_unseen_count)
 804     {
 805 #ifdef NO_IMPLICIT_EXTERN_C
 806       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 807 #endif
 808     }
 809
 810   switch (special_file_handling)
 811     {
 812     case errno_h:
 813       if (!seen_errno)
 814         fprintf (outf, "extern int errno;\n");
 815       break;
 816     case stdlib_h:
 817       if (!seen_EXIT_FAILURE)
 818         fprintf (outf, "#define EXIT_FAILURE 1\n");
 819       if (!seen_EXIT_SUCCESS)
 820         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 821       break;
 822     case sys_stat_h:
 823       if (!seen_S_ISBLK && seen_S_IFBLK)
 824         fprintf (outf,
 825                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 826       if (!seen_S_ISCHR && seen_S_IFCHR)
 827         fprintf (outf,
 828                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 829       if (!seen_S_ISDIR && seen_S_IFDIR)
 830         fprintf (outf,
 831                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 832       if (!seen_S_ISFIFO && seen_S_IFIFO)
 833         fprintf (outf,
 834                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 835       if (!seen_S_ISLNK && seen_S_IFLNK)
 836         fprintf (outf,
 837                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 838       if (!seen_S_ISREG && seen_S_IFREG)
 839         fprintf (outf,
 840                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 841       break;
 842
 843     default:
 844       break;
 845     }
 846
 847
 848 #if ADD_MISSING_EXTERN_C
 849   if (missing_extern_C_count + required_unseen_count > 0)
 850     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 851 #endif
 852 }
 853
 854 /* Returns 1 iff the file is properly protected from multiple inclusion:
 855    #ifndef PROTECT_NAME
 856    #define PROTECT_NAME
 857    #endif
 858
 859  */
 860
 861 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 862 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 863
 864 static int
 865 inf_skip_spaces (c)
 866      int c;
 867 {
 868   for (;;)
 869     {
 870       if (c == ' ' || c == '\t')
 871         c = INF_GET ();
 872       else if (c == '/')
 873         {
 874           c = INF_GET ();
 875           if (c != '*')
 876             {
 877               (void) INF_UNGET (c);
 878               return '/';
 879             }
 880           c = INF_GET ();
 881           for (;;)
 882             {
 883               if (c == EOF)
 884                 return EOF;
 885               else if (c != '*')
 886                 {
 887                   if (c == '\n')
 888                     source_lineno++, lineno++;
 889                   c = INF_GET ();
 890                 }
 891               else if ((c = INF_GET ()) == '/')
 892                 return INF_GET ();
 893             }
 894         }
 895       else
 896         break;
 897     }
 898   return c;
 899 }
 900
 901 /* Read into STR from inf_buffer upto DELIM.  */
 902
 903 static int
 904 inf_read_upto (str, delim)
 905      sstring *str;
 906      int delim;
 907 {
 908   int ch;
 909   for (;;)
 910     {
 911       ch = INF_GET ();
 912       if (ch == EOF || ch == delim)
 913         break;
 914       SSTRING_PUT (str, ch);
 915     }
 916   MAKE_SSTRING_SPACE (str, 1);
 917   *str->ptr = 0;
 918   return ch;
 919 }
 920
 921 static int
 922 inf_scan_ident (s, c)
 923      register sstring *s;
 924      int c;
 925 {
 926   s->ptr = s->base;
 927   if (ISALPHA (c) || c == '_')
 928     {
 929       for (;;)
 930         {
 931           SSTRING_PUT (s, c);
 932           c = INF_GET ();
 933           if (c == EOF || !(ISALNUM (c) || c == '_'))
 934             break;
 935         }
 936     }
 937   MAKE_SSTRING_SPACE (s, 1);
 938   *s->ptr = 0;
 939   return c;
 940 }
 941
 942 /* Returns 1 if the file is correctly protected against multiple
 943    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 944    and setting *endif_line to the final #endif.
 945    Otherwise return 0.  */
 946
 947 static int
 948 check_protection (ifndef_line, endif_line)
 949      int *ifndef_line, *endif_line;
 950 {
 951   int c;
 952   int if_nesting = 1; /* Level of nesting of #if's */
 953   char *protect_name = NULL; /* Identifier following initial #ifndef */
 954   int define_seen = 0;
 955
 956   /* Skip initial white space (including comments).  */
 957   for (;; lineno++)
 958     {
 959       c = inf_skip_spaces (' ');
 960       if (c == EOF)
 961         return 0;
 962       if (c != '\n')
 963         break;
 964     }
 965   if (c != '#')
 966     return 0;
 967   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 968   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 969     return 0;
 970
 971   /* So far so good: We've seen an initial #ifndef.  */
 972   *ifndef_line = lineno;
 973   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 974   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 975     return 0;
 976   protect_name = xstrdup (buf.base);
 977
 978   (void) INF_UNGET (c);
 979   c = inf_read_upto (&buf, '\n');
 980   if (c == EOF)
 981     return 0;
 982   lineno++;
 983
 984   for (;;)
 985     {
 986       c = inf_skip_spaces (' ');
 987       if (c == EOF)
 988         return 0;
 989       if (c == '\n')
 990         {
 991           lineno++;
 992           continue;
 993         }
 994       if (c != '#')
 995         goto skip_to_eol;
 996       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 997       if (SSTRING_LENGTH (&buf) == 0)
 998         ;
 999       else if (!strcmp (buf.base, "ifndef")
1000           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1001         {
1002           if_nesting++;
1003         }
1004       else if (!strcmp (buf.base, "endif"))
1005         {
1006           if_nesting--;
1007           if (if_nesting == 0)
1008             break;
1009         }
1010       else if (!strcmp (buf.base, "else"))
1011         {
1012           if (if_nesting == 1)
1013             return 0;
1014         }
1015       else if (!strcmp (buf.base, "define"))
1016         {
1017           c = inf_skip_spaces (c);
1018           c = inf_scan_ident (&buf, c);
1019           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1020             define_seen = 1;
1021         }
1022     skip_to_eol:
1023       for (;;)
1024         {
1025           if (c == '\n' || c == EOF)
1026             break;
1027           c = INF_GET ();
1028         }
1029       if (c == EOF)
1030         return 0;
1031       lineno++;
1032     }
1033
1034   if (!define_seen)
1035      return 0;
1036   *endif_line = lineno;
1037   /* Skip final white space (including comments).  */
1038   for (;;)
1039     {
1040       c = inf_skip_spaces (' ');
1041       if (c == EOF)
1042         break;
1043       if (c != '\n')
1044         return 0;
1045     }
1046
1047   return 1;
1048 }
1049
1050 extern int main                 PARAMS ((int, char **));
1051
1052 int
1053 main (argc, argv)
1054      int argc;
1055      char **argv;
1056 {
1057   int inf_fd;
1058   struct stat sbuf;
1059   int c;
1060 #ifdef FIXPROTO_IGNORE_LIST
1061   int i;
1062 #endif
1063   const char *cptr;
1064   int ifndef_line;
1065   int endif_line;
1066   long to_read;
1067   long int inf_size;
1068   register struct symbol_list *cur_symbols;
1069
1070   if (argv[0] && argv[0][0])
1071     {
1072       register char *p;
1073
1074       progname = 0;
1075       for (p = argv[0]; *p; p++)
1076         if (*p == '/')
1077           progname = p;
1078       progname = progname ? progname+1 : argv[0];
1079     }
1080
1081   if (argc < 4)
1082     {
1083       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1084                progname);
1085       exit (FATAL_EXIT_CODE);
1086     }
1087
1088   inc_filename = argv[1];
1089   inc_filename_length = strlen (inc_filename);
1090
1091 #ifdef FIXPROTO_IGNORE_LIST
1092   for (i = 0; files_to_ignore[i] != NULL; i++)
1093     {
1094       char *ignore_name = files_to_ignore[i];
1095       int ignore_len = strlen (ignore_name);
1096       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1097         {
1098           if (ignore_name[ignore_len-1] == '/'
1099               || inc_filename[ignore_len] == '\0')
1100             {
1101               if (verbose)
1102                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1103               exit (SUCCESS_EXIT_CODE);
1104             }
1105         }
1106
1107     }
1108 #endif
1109
1110   if (strcmp (inc_filename, "sys/stat.h") == 0)
1111     special_file_handling = sys_stat_h;
1112   else if (strcmp (inc_filename, "errno.h") == 0)
1113     special_file_handling = errno_h, required_other++;
1114   else if (strcmp (inc_filename, "stdlib.h") == 0)
1115     special_file_handling = stdlib_h, required_other+=2;
1116   else if (strcmp (inc_filename, "stdio.h") == 0)
1117     special_file_handling = stdio_h;
1118   include_entry = std_include_table;
1119   while (include_entry->name != NULL
1120          && ((strcmp (include_entry->name, CONTINUED) == 0)
1121              || strcmp (inc_filename, include_entry->name) != 0))
1122     include_entry++;
1123
1124   if (include_entry->name != NULL)
1125     {
1126       struct std_include_entry *entry;
1127       cur_symbol_table_size = 0;
1128       for (entry = include_entry; ;)
1129         {
1130           if (entry->flags)
1131             add_symbols (entry->flags, entry->names);
1132           entry++;
1133           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1134             break;
1135         }
1136     }
1137   else
1138     symbol_table[0].names = NULL;
1139
1140   /* Count and mark the prototypes required for this include file.  */
1141   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1142     {
1143       int name_len;
1144       if (cur_symbols->flags & MACRO_SYMBOL)
1145         continue;
1146       cptr = cur_symbols->names;
1147       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1148         {
1149           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1150           required_unseen_count++;
1151           if (fn == NULL)
1152             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1153           else
1154             SET_REQUIRED (fn);
1155         }
1156     }
1157
1158   read_scan_file (argv[2], argc - 4, argv + 4);
1159
1160   inf_fd = open (argv[2], O_RDONLY, 0666);
1161   if (inf_fd < 0)
1162     {
1163       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1164                progname, argv[2]);
1165       perror (NULL);
1166       exit (FATAL_EXIT_CODE);
1167     }
1168   if (fstat (inf_fd, &sbuf) < 0)
1169     {
1170       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1171       perror (NULL);
1172       exit (FATAL_EXIT_CODE);
1173     }
1174   inf_size = sbuf.st_size;
1175   inf_buffer = (char *) xmalloc (inf_size + 2);
1176   inf_buffer[inf_size] = '\n';
1177   inf_buffer[inf_size + 1] = '\0';
1178   inf_limit = inf_buffer + inf_size;
1179   inf_ptr = inf_buffer;
1180
1181   to_read = inf_size;
1182   while (to_read > 0)
1183     {
1184       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1185       if (i < 0)
1186         {
1187           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1188           perror (NULL);
1189           exit (FATAL_EXIT_CODE);
1190         }
1191       if (i == 0)
1192         {
1193           inf_size -= to_read;
1194           break;
1195         }
1196       to_read -= i;
1197     }
1198
1199   close (inf_fd);
1200
1201   /* If file doesn't end with '\n', add one.  */
1202   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1203     inf_limit++;
1204
1205   unlink (argv[3]);
1206   outf = fopen (argv[3], "w");
1207   if (outf == NULL)
1208     {
1209       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1210                progname, argv[3]);
1211       perror (NULL);
1212       exit (FATAL_EXIT_CODE);
1213     }
1214
1215   lineno = 1;
1216
1217   if (check_protection (&ifndef_line, &endif_line))
1218     {
1219       lbrac_line = ifndef_line+1;
1220       rbrac_line = endif_line;
1221     }
1222   else
1223     {
1224       lbrac_line = 1;
1225       rbrac_line = -1;
1226     }
1227
1228   /* Reset input file.  */
1229   inf_ptr = inf_buffer;
1230   lineno = 1;
1231
1232   for (;;)
1233     {
1234       if (lineno == lbrac_line)
1235         write_lbrac ();
1236       if (lineno == rbrac_line)
1237         write_rbrac ();
1238       for (;;)
1239         {
1240           struct fn_decl *fn;
1241           c = INF_GET ();
1242           if (c == EOF)
1243             break;
1244           if (ISALPHA (c) || c == '_')
1245             {
1246               c = inf_scan_ident (&buf, c);
1247               (void) INF_UNGET (c);
1248               fputs (buf.base, outf);
1249               fn = lookup_std_proto (buf.base, strlen (buf.base));
1250               /* We only want to edit the declaration matching the one
1251                  seen by scan-decls, as there can be multiple
1252                  declarations, selected by #ifdef __STDC__ or whatever.  */
1253               if (fn && fn->partial && fn->partial->line_seen == lineno)
1254                 {
1255                   c = inf_skip_spaces (' ');
1256                   if (c == EOF)
1257                     break;
1258                   if (c == '(')
1259                     {
1260                       c = inf_skip_spaces (' ');
1261                       if (c == ')')
1262                         {
1263                           fprintf (outf, " _PARAMS((%s))", fn->params);
1264                         }
1265                       else
1266                         {
1267                           putc ('(', outf);
1268                           (void) INF_UNGET (c);
1269                         }
1270                     }
1271                   else
1272                     fprintf (outf, " %c", c);
1273                 }
1274             }
1275           else
1276             {
1277               putc (c, outf);
1278               if (c == '\n')
1279                 break;
1280             }
1281         }
1282       if (c == EOF)
1283         break;
1284       lineno++;
1285     }
1286   if (rbrac_line < 0)
1287     write_rbrac ();
1288
1289   fclose (outf);
1290
1291   return 0;
1292 }
1293 \f
1294
1295 static void
1296 v_fatal (str, ap)
1297   const char * str;
1298   va_list ap;
1299 {
1300   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1301   vfprintf (stderr, str, ap);
1302   fprintf (stderr, "\n");
1303
1304   exit (FATAL_EXIT_CODE);
1305 }
1306
1307 static void
1308 fatal VPARAMS ((const char *str, ...))
1309 {
1310 #ifndef ANSI_PROTOTYPES
1311   const char *str;
1312 #endif
1313   va_list ap;
1314
1315   VA_START(ap, str);
1316
1317 #ifndef ANSI_PROTOTYPES
1318   str = va_arg (ap, const char *);
1319 #endif
1320
1321   v_fatal(str, ap);
1322   va_end(ap);
1323 }