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 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 sstring buf;
  88
  89 int verbose = 0;
  90 int partial_count = 0;
  91 int warnings = 0;
  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 const char *const 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 static const char *cur_file;
 118
 119 /* Certain standard files get extra treatment */
 120
 121 enum special_file
 122 {
 123   no_special,
 124 #ifdef errno_h
 125 #undef errno_h
 126 #endif
 127   errno_h,
 128 #ifdef stdio_h
 129 #undef stdio_h
 130 #endif
 131   stdio_h,
 132 #ifdef stdlib_h
 133 #undef stdlib_h
 134 #endif
 135   stdlib_h,
 136 #ifdef sys_stat_h
 137 #undef sys_stat_h
 138 #endif
 139   sys_stat_h
 140 };
 141
 142 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 143    by an empty name (i.e. by "\0\0").  */
 144
 145 typedef const char *namelist;
 146
 147 /* The following macros provide the bits for symbol_flags.  */
 148 typedef int symbol_flags;
 149
 150 /* Used to mark names defined in the ANSI/ISO C standard.  */
 151 #define ANSI_SYMBOL 1
 152
 153 /* We no longer massage include files for POSIX or XOPEN symbols,
 154    as there are now several versions of the POSIX and XOPEN standards,
 155    and it would be a maintenance nightmare for us to track them all.
 156    Better to be compatible with the system include files.  */
 157 /*#define ADD_MISSING_POSIX 1 */
 158 /*#define ADD_MISSING_XOPEN 1 */
 159
 160 #if ADD_MISSING_POSIX
 161 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 162 #define POSIX1_SYMBOL 2
 163 #define POSIX2_SYMBOL 4
 164 #else
 165 #define POSIX1_SYMBOL 0
 166 #define POSIX2_SYMBOL 0
 167 #endif
 168
 169 #if ADD_MISSING_XOPEN
 170 /* Used to mark names defined in X/Open Portability Guide.  */
 171 #define XOPEN_SYMBOL 8
 172 /* Used to mark names defined in X/Open UNIX Extensions.  */
 173 #define XOPEN_EXTENDED_SYMBOL 16
 174 #else
 175 #define XOPEN_SYMBOL 0
 176 #define XOPEN_EXTENDED_SYMBOL 0
 177 #endif
 178
 179 /* Used to indicate names that are not functions */
 180 #define MACRO_SYMBOL 512
 181
 182 struct symbol_list {
 183   symbol_flags flags;
 184   namelist names;
 185 };
 186
 187 #define SYMBOL_TABLE_SIZE 10
 188 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 189 int cur_symbol_table_size;
 190
 191 static void add_symbols (symbol_flags, namelist);
 192 static struct fn_decl *lookup_std_proto (const char *, int);
 193 static void write_lbrac (void);
 194 static void recognized_macro (const char *);
 195 static void check_macro_names (cpp_reader *, namelist);
 196 static void read_scan_file (char *, int, char **);
 197 static void write_rbrac (void);
 198 static int inf_skip_spaces (int);
 199 static int inf_read_upto (sstring *, int);
 200 static int inf_scan_ident (sstring *, int);
 201 static int check_protection (int *, int *);
 202 static void cb_file_change (cpp_reader *, const struct line_map *);
 203
 204 static void
 205 add_symbols (symbol_flags flags, 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 *const name;
 217   const symbol_flags flags;
 218   const 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 const struct std_include_entry *include_entry;
 227
 228 const 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 struct obstack scan_file_obstack;
 374
 375 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 376
 377 static struct fn_decl *
 378 lookup_std_proto (const char *name, int name_length)
 379 {
 380   int i = hashstr (name, name_length) % HASH_SIZE;
 381   int i0 = i;
 382   for (;;)
 383     {
 384       struct fn_decl *fn;
 385       if (hash_tab[i] == 0)
 386         return NULL;
 387       fn = &std_protos[hash_tab[i]];
 388       if ((int) strlen (fn->fname) == name_length
 389           && strncmp (fn->fname, name, name_length) == 0)
 390         return fn;
 391       i = (i+1) % HASH_SIZE;
 392       if (i == i0)
 393         abort ();
 394     }
 395 }
 396
 397 char *inc_filename;
 398 int inc_filename_length;
 399 const char *progname = "fix-header";
 400 FILE *outf;
 401 sstring line;
 402
 403 int lbrac_line, rbrac_line;
 404
 405 int required_unseen_count = 0;
 406 int required_other = 0;
 407
 408 static void
 409 write_lbrac (void)
 410 {
 411   if (partial_count)
 412     {
 413       fprintf (outf, "#ifndef _PARAMS\n");
 414       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 415       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 416       fprintf (outf, "#else\n");
 417       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 418       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 419     }
 420 }
 421
 422 struct partial_proto
 423 {
 424   struct partial_proto *next;
 425   struct fn_decl *fn;
 426   int line_seen;
 427 };
 428
 429 struct partial_proto *partial_proto_list = NULL;
 430
 431 struct partial_proto required_dummy_proto, seen_dummy_proto;
 432 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 433 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 434 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 435 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 436
 437 static void
 438 recognized_macro (const char *fname)
 439 {
 440   /* The original include file defines fname as a macro.  */
 441   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 442
 443   /* Since fname is a macro, don't require a prototype for it.  */
 444   if (fn)
 445     {
 446       if (REQUIRED (fn))
 447         required_unseen_count--;
 448       SET_SEEN (fn);
 449     }
 450
 451   switch (special_file_handling)
 452     {
 453     case errno_h:
 454       if (strcmp (fname, "errno") == 0 && !seen_errno)
 455         seen_errno = 1, required_other--;
 456       break;
 457     case stdlib_h:
 458       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 459         seen_EXIT_FAILURE = 1, required_other--;
 460       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 461         seen_EXIT_SUCCESS = 1, required_other--;
 462       break;
 463     case sys_stat_h:
 464       if (fname[0] == 'S' && fname[1] == '_')
 465         {
 466           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 467           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 468           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 469           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 470           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 471           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 472           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 473           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 474           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 475           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 476           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 477           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 478         }
 479       break;
 480
 481     default:
 482       break;
 483     }
 484 }
 485
 486 void
 487 recognized_extern (const cpp_token *name)
 488 {
 489   switch (special_file_handling)
 490     {
 491     case errno_h:
 492       if (cpp_ideq (name, "errno"))
 493         seen_errno = 1, required_other--;
 494       break;
 495
 496     default:
 497       break;
 498     }
 499 }
 500
 501 /* Called by scan_decls if it saw a function definition for a function
 502    named FNAME.  KIND is 'I' for an inline function; 'F' if a normal
 503    function declaration preceded by 'extern "C"' (or nested inside
 504    'extern "C"' braces); or 'f' for other function declarations.  */
 505
 506 void
 507 recognized_function (const cpp_token *fname, unsigned int line, int kind,
 508                      int have_arg_list)
 509 {
 510   struct partial_proto *partial;
 511   int i;
 512   struct fn_decl *fn;
 513
 514   fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
 515                          NODE_LEN (fname->val.node));
 516
 517   /* Remove the function from the list of required function.  */
 518   if (fn)
 519     {
 520       if (REQUIRED (fn))
 521         required_unseen_count--;
 522       SET_SEEN (fn);
 523     }
 524
 525   /* If we have a full prototype, we're done.  */
 526   if (have_arg_list)
 527     return;
 528
 529   if (kind == 'I')  /* don't edit inline function */
 530     return;
 531
 532   /* If the partial prototype was included from some other file,
 533      we don't need to patch it up (in this run).  */
 534   i = strlen (cur_file);
 535   if (i < inc_filename_length
 536       || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
 537     return;
 538
 539   if (fn == NULL)
 540     return;
 541   if (fn->params[0] == '\0')
 542     return;
 543
 544   /* We only have a partial function declaration,
 545      so remember that we have to add a complete prototype.  */
 546   partial_count++;
 547   partial = obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 548   partial->line_seen = line;
 549   partial->fn = fn;
 550   fn->partial = partial;
 551   partial->next = partial_proto_list;
 552   partial_proto_list = partial;
 553   if (verbose)
 554     {
 555       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 556                inc_filename, fn->fname);
 557     }
 558 }
 559
 560 /* For any name in NAMES that is defined as a macro,
 561    call recognized_macro on it.  */
 562
 563 static void
 564 check_macro_names (cpp_reader *pfile, namelist names)
 565 {
 566   size_t len;
 567   while (*names)
 568     {
 569       len = strlen (names);
 570       if (cpp_defined (pfile, (const unsigned char *)names, len))
 571         recognized_macro (names);
 572       names += len + 1;
 573     }
 574 }
 575
 576 static void
 577 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
 578                 const struct line_map *map)
 579 {
 580   /* Just keep track of current file name.  */
 581   cur_file = map->to_file;
 582 }
 583
 584 static void
 585 read_scan_file (char *in_fname, int argc, char **argv)
 586 {
 587   cpp_reader *scan_in;
 588   cpp_callbacks *cb;
 589   cpp_options *options;
 590   struct fn_decl *fn;
 591   int i, strings_processed;
 592   struct symbol_list *cur_symbols;
 593
 594   obstack_init (&scan_file_obstack);
 595
 596   scan_in = cpp_create_reader (CLK_GNUC89, NULL);
 597   cb = cpp_get_callbacks (scan_in);
 598   cb->file_change = cb_file_change;
 599
 600   /* We are going to be scanning a header file out of its proper context,
 601      so ignore warnings and errors.  */
 602   options = cpp_get_options (scan_in);
 603   options->inhibit_warnings = 1;
 604   options->inhibit_errors = 1;
 605
 606   if (! cpp_read_main_file (scan_in, in_fname))
 607     exit (FATAL_EXIT_CODE);
 608
 609   cpp_change_file (scan_in, LC_RENAME, "<built-in>");
 610   cpp_init_builtins (scan_in, true);
 611   cpp_change_file (scan_in, LC_RENAME, in_fname);
 612
 613   /* Process switches after builtins so -D can override them.  */
 614   for (i = 0; i < argc; i += strings_processed)
 615     {
 616       strings_processed = 0;
 617       if (argv[i][0] == '-')
 618         {
 619           if (argv[i][1] == 'I')
 620             {
 621               if (argv[i][2] != '\0')
 622                 {
 623                   strings_processed = 1;
 624                   add_path (xstrdup (argv[i] + 2), BRACKET, false);
 625                 }
 626               else if (i + 1 != argc)
 627                 {
 628                   strings_processed = 2;
 629                   add_path (xstrdup (argv[i + 1]), BRACKET, false);
 630                 }
 631             }
 632           else if (argv[i][1] == 'D')
 633             {
 634               if (argv[i][2] != '\0')
 635                 strings_processed = 1, cpp_define (scan_in, argv[i] + 2);
 636               else if (i + 1 != argc)
 637                 strings_processed = 2, cpp_define (scan_in, argv[i + 1]);
 638             }
 639         }
 640
 641       if (strings_processed == 0)
 642         break;
 643     }
 644
 645   if (i < argc)
 646     cpp_error (scan_in, DL_ERROR, "invalid option `%s'", argv[i]);
 647   if (cpp_errors (scan_in))
 648     exit (FATAL_EXIT_CODE);
 649
 650   register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
 651                            true /* stdinc */, false /* cxx_stdinc */,
 652                            false /* verbose */);
 653
 654   /* We are scanning a system header, so mark it as such.  */
 655   cpp_make_system_header (scan_in, 1, 0);
 656
 657   scan_decls (scan_in, argc, argv);
 658   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 659     check_macro_names (scan_in, cur_symbols->names);
 660
 661   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 662      If so, those functions are also required.  */
 663   if (special_file_handling == stdio_h
 664       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 665     {
 666       unsigned char getchar_call[] = "getchar();\n";
 667       int seen_filbuf = 0;
 668
 669       /* Scan the macro expansion of "getchar();".  */
 670       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 671                        /* from_stage3 */ true, 1);
 672       for (;;)
 673         {
 674           const cpp_token *t = cpp_get_token (scan_in);
 675
 676           if (t->type == CPP_EOF)
 677             break;
 678           else if (cpp_ideq (t, "_filbuf"))
 679             seen_filbuf++;
 680         }
 681
 682       if (seen_filbuf)
 683         {
 684           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 685           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 686           int need_flsbuf
 687             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 688
 689           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 690           if (need_filbuf + need_flsbuf)
 691             {
 692               const char *new_list;
 693               if (need_filbuf)
 694                 SET_REQUIRED (fn);
 695               if (need_flsbuf)
 696                 SET_REQUIRED (flsbuf_fn);
 697               if (need_flsbuf && need_filbuf)
 698                 new_list = "_filbuf\0_flsbuf\0";
 699               else if (need_flsbuf)
 700                 new_list = "_flsbuf\0";
 701               else /* if (need_flsbuf) */
 702                 new_list = "_filbuf\0";
 703               add_symbols (ANSI_SYMBOL, new_list);
 704               required_unseen_count += need_filbuf + need_flsbuf;
 705             }
 706         }
 707     }
 708
 709   if (required_unseen_count + partial_count + required_other == 0)
 710     {
 711       if (verbose)
 712         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 713       exit (SUCCESS_EXIT_CODE);
 714     }
 715   if (!verbose)
 716     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 717   else
 718     {
 719       if (required_unseen_count)
 720         fprintf (stderr, "%s: %d missing function declarations.\n",
 721                  inc_filename, required_unseen_count);
 722       if (partial_count)
 723         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 724                  inc_filename, partial_count);
 725     }
 726 }
 727
 728 static void
 729 write_rbrac (void)
 730 {
 731   struct fn_decl *fn;
 732   const char *cptr;
 733   struct symbol_list *cur_symbols;
 734
 735   if (required_unseen_count)
 736     {
 737 #ifdef NO_IMPLICIT_EXTERN_C
 738       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 739 #endif
 740     }
 741
 742   /* Now we print out prototypes for those functions that we haven't seen.  */
 743   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 744     {
 745       int if_was_emitted = 0;
 746       int name_len;
 747       cptr = cur_symbols->names;
 748       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 749         {
 750           int macro_protect = 0;
 751
 752           if (cur_symbols->flags & MACRO_SYMBOL)
 753             continue;
 754
 755           fn = lookup_std_proto (cptr, name_len);
 756           if (fn == NULL || !REQUIRED (fn))
 757             continue;
 758
 759           if (!if_was_emitted)
 760             {
 761 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 762               if (cur_symbols->flags & ANSI_SYMBOL)
 763                 fprintf (outf,
 764          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 765               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 766                 fprintf (outf,
 767        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 768     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 769     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 770               else if (cur_symbols->flags & XOPEN_SYMBOL)
 771                 {
 772                 fprintf (outf,
 773        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 774    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 775                 }
 776               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 777                 {
 778                 fprintf (outf,
 779        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 780    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 781                 }
 782               else
 783                 {
 784                   fatal ("internal error for function %s", fn->fname);
 785                 }
 786               if_was_emitted = 1;
 787             }
 788
 789           /* In the case of memmove, protect in case the application
 790              defines it as a macro before including the header.  */
 791           if (!strcmp (fn->fname, "memmove")
 792               || !strcmp (fn->fname, "putc")
 793               || !strcmp (fn->fname, "getc")
 794               || !strcmp (fn->fname, "vprintf")
 795               || !strcmp (fn->fname, "vfprintf")
 796               || !strcmp (fn->fname, "vsprintf")
 797               || !strcmp (fn->fname, "rewinddir")
 798               || !strcmp (fn->fname, "abort"))
 799             macro_protect = 1;
 800
 801           if (macro_protect)
 802             fprintf (outf, "#ifndef %s\n", fn->fname);
 803           fprintf (outf, "extern %s %s (%s);\n",
 804                    fn->rtype, fn->fname, fn->params);
 805           if (macro_protect)
 806             fprintf (outf, "#endif\n");
 807         }
 808       if (if_was_emitted)
 809         fprintf (outf,
 810                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 811     }
 812   if (required_unseen_count)
 813     {
 814 #ifdef NO_IMPLICIT_EXTERN_C
 815       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 816 #endif
 817     }
 818
 819   switch (special_file_handling)
 820     {
 821     case errno_h:
 822       if (!seen_errno)
 823         fprintf (outf, "extern int errno;\n");
 824       break;
 825     case stdlib_h:
 826       if (!seen_EXIT_FAILURE)
 827         fprintf (outf, "#define EXIT_FAILURE 1\n");
 828       if (!seen_EXIT_SUCCESS)
 829         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 830       break;
 831     case sys_stat_h:
 832       if (!seen_S_ISBLK && seen_S_IFBLK)
 833         fprintf (outf,
 834                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 835       if (!seen_S_ISCHR && seen_S_IFCHR)
 836         fprintf (outf,
 837                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 838       if (!seen_S_ISDIR && seen_S_IFDIR)
 839         fprintf (outf,
 840                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 841       if (!seen_S_ISFIFO && seen_S_IFIFO)
 842         fprintf (outf,
 843                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 844       if (!seen_S_ISLNK && seen_S_IFLNK)
 845         fprintf (outf,
 846                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 847       if (!seen_S_ISREG && seen_S_IFREG)
 848         fprintf (outf,
 849                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 850       break;
 851
 852     default:
 853       break;
 854     }
 855
 856 }
 857
 858 /* Returns 1 iff the file is properly protected from multiple inclusion:
 859    #ifndef PROTECT_NAME
 860    #define PROTECT_NAME
 861    #endif
 862
 863  */
 864
 865 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 866 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 867
 868 static int
 869 inf_skip_spaces (int c)
 870 {
 871   for (;;)
 872     {
 873       if (c == ' ' || c == '\t')
 874         c = INF_GET ();
 875       else if (c == '/')
 876         {
 877           c = INF_GET ();
 878           if (c != '*')
 879             {
 880               (void) INF_UNGET (c);
 881               return '/';
 882             }
 883           c = INF_GET ();
 884           for (;;)
 885             {
 886               if (c == EOF)
 887                 return EOF;
 888               else if (c != '*')
 889                 {
 890                   if (c == '\n')
 891                     source_lineno++, lineno++;
 892                   c = INF_GET ();
 893                 }
 894               else if ((c = INF_GET ()) == '/')
 895                 return INF_GET ();
 896             }
 897         }
 898       else
 899         break;
 900     }
 901   return c;
 902 }
 903
 904 /* Read into STR from inf_buffer upto DELIM.  */
 905
 906 static int
 907 inf_read_upto (sstring *str, int delim)
 908 {
 909   int ch;
 910   for (;;)
 911     {
 912       ch = INF_GET ();
 913       if (ch == EOF || ch == delim)
 914         break;
 915       SSTRING_PUT (str, ch);
 916     }
 917   MAKE_SSTRING_SPACE (str, 1);
 918   *str->ptr = 0;
 919   return ch;
 920 }
 921
 922 static int
 923 inf_scan_ident (sstring *s, int c)
 924 {
 925   s->ptr = s->base;
 926   if (ISIDST (c))
 927     {
 928       for (;;)
 929         {
 930           SSTRING_PUT (s, c);
 931           c = INF_GET ();
 932           if (c == EOF || !(ISIDNUM (c)))
 933             break;
 934         }
 935     }
 936   MAKE_SSTRING_SPACE (s, 1);
 937   *s->ptr = 0;
 938   return c;
 939 }
 940
 941 /* Returns 1 if the file is correctly protected against multiple
 942    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 943    and setting *endif_line to the final #endif.
 944    Otherwise return 0.  */
 945
 946 static int
 947 check_protection (int *ifndef_line, int *endif_line)
 948 {
 949   int c;
 950   int if_nesting = 1; /* Level of nesting of #if's */
 951   char *protect_name = NULL; /* Identifier following initial #ifndef */
 952   int define_seen = 0;
 953
 954   /* Skip initial white space (including comments).  */
 955   for (;; lineno++)
 956     {
 957       c = inf_skip_spaces (' ');
 958       if (c == EOF)
 959         return 0;
 960       if (c != '\n')
 961         break;
 962     }
 963   if (c != '#')
 964     return 0;
 965   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 966   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 967     return 0;
 968
 969   /* So far so good: We've seen an initial #ifndef.  */
 970   *ifndef_line = lineno;
 971   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 972   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 973     return 0;
 974   protect_name = xstrdup (buf.base);
 975
 976   (void) INF_UNGET (c);
 977   c = inf_read_upto (&buf, '\n');
 978   if (c == EOF)
 979     return 0;
 980   lineno++;
 981
 982   for (;;)
 983     {
 984       c = inf_skip_spaces (' ');
 985       if (c == EOF)
 986         return 0;
 987       if (c == '\n')
 988         {
 989           lineno++;
 990           continue;
 991         }
 992       if (c != '#')
 993         goto skip_to_eol;
 994       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 995       if (SSTRING_LENGTH (&buf) == 0)
 996         ;
 997       else if (!strcmp (buf.base, "ifndef")
 998           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
 999         {
1000           if_nesting++;
1001         }
1002       else if (!strcmp (buf.base, "endif"))
1003         {
1004           if_nesting--;
1005           if (if_nesting == 0)
1006             break;
1007         }
1008       else if (!strcmp (buf.base, "else"))
1009         {
1010           if (if_nesting == 1)
1011             return 0;
1012         }
1013       else if (!strcmp (buf.base, "define"))
1014         {
1015           c = inf_skip_spaces (c);
1016           c = inf_scan_ident (&buf, c);
1017           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1018             define_seen = 1;
1019         }
1020     skip_to_eol:
1021       for (;;)
1022         {
1023           if (c == '\n' || c == EOF)
1024             break;
1025           c = INF_GET ();
1026         }
1027       if (c == EOF)
1028         return 0;
1029       lineno++;
1030     }
1031
1032   if (!define_seen)
1033      return 0;
1034   *endif_line = lineno;
1035   /* Skip final white space (including comments).  */
1036   for (;;)
1037     {
1038       c = inf_skip_spaces (' ');
1039       if (c == EOF)
1040         break;
1041       if (c != '\n')
1042         return 0;
1043     }
1044
1045   return 1;
1046 }
1047
1048 extern int main (int, char **);
1049
1050 int
1051 main (int argc, char **argv)
1052 {
1053   int inf_fd;
1054   struct stat sbuf;
1055   int c;
1056 #ifdef FIXPROTO_IGNORE_LIST
1057   int i;
1058 #endif
1059   const char *cptr;
1060   int ifndef_line;
1061   int endif_line;
1062   long to_read;
1063   long int inf_size;
1064   struct symbol_list *cur_symbols;
1065
1066   if (argv[0] && argv[0][0])
1067     {
1068       char *p;
1069
1070       progname = 0;
1071       for (p = argv[0]; *p; p++)
1072         if (*p == '/')
1073           progname = p;
1074       progname = progname ? progname+1 : argv[0];
1075     }
1076
1077   if (argc < 4)
1078     {
1079       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1080                progname);
1081       exit (FATAL_EXIT_CODE);
1082     }
1083
1084   inc_filename = argv[1];
1085   inc_filename_length = strlen (inc_filename);
1086
1087 #ifdef FIXPROTO_IGNORE_LIST
1088   for (i = 0; files_to_ignore[i] != NULL; i++)
1089     {
1090       const char *const ignore_name = files_to_ignore[i];
1091       int ignore_len = strlen (ignore_name);
1092       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1093         {
1094           if (ignore_name[ignore_len-1] == '/'
1095               || inc_filename[ignore_len] == '\0')
1096             {
1097               if (verbose)
1098                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1099               exit (SUCCESS_EXIT_CODE);
1100             }
1101         }
1102
1103     }
1104 #endif
1105
1106   if (strcmp (inc_filename, "sys/stat.h") == 0)
1107     special_file_handling = sys_stat_h;
1108   else if (strcmp (inc_filename, "errno.h") == 0)
1109     special_file_handling = errno_h, required_other++;
1110   else if (strcmp (inc_filename, "stdlib.h") == 0)
1111     special_file_handling = stdlib_h, required_other+=2;
1112   else if (strcmp (inc_filename, "stdio.h") == 0)
1113     special_file_handling = stdio_h;
1114   include_entry = std_include_table;
1115   while (include_entry->name != NULL
1116          && ((strcmp (include_entry->name, CONTINUED) == 0)
1117              || strcmp (inc_filename, include_entry->name) != 0))
1118     include_entry++;
1119
1120   if (include_entry->name != NULL)
1121     {
1122       const struct std_include_entry *entry;
1123       cur_symbol_table_size = 0;
1124       for (entry = include_entry; ;)
1125         {
1126           if (entry->flags)
1127             add_symbols (entry->flags, entry->names);
1128           entry++;
1129           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1130             break;
1131         }
1132     }
1133   else
1134     symbol_table[0].names = NULL;
1135
1136   /* Count and mark the prototypes required for this include file.  */
1137   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1138     {
1139       int name_len;
1140       if (cur_symbols->flags & MACRO_SYMBOL)
1141         continue;
1142       cptr = cur_symbols->names;
1143       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1144         {
1145           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1146           required_unseen_count++;
1147           if (fn == NULL)
1148             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1149           else
1150             SET_REQUIRED (fn);
1151         }
1152     }
1153
1154   read_scan_file (argv[2], argc - 4, argv + 4);
1155
1156   inf_fd = open (argv[2], O_RDONLY, 0666);
1157   if (inf_fd < 0)
1158     {
1159       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1160                progname, argv[2]);
1161       perror (NULL);
1162       exit (FATAL_EXIT_CODE);
1163     }
1164   if (fstat (inf_fd, &sbuf) < 0)
1165     {
1166       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1167       perror (NULL);
1168       exit (FATAL_EXIT_CODE);
1169     }
1170   inf_size = sbuf.st_size;
1171   inf_buffer = xmalloc (inf_size + 2);
1172   inf_ptr = inf_buffer;
1173
1174   to_read = inf_size;
1175   while (to_read > 0)
1176     {
1177       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1178       if (i < 0)
1179         {
1180           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1181           perror (NULL);
1182           exit (FATAL_EXIT_CODE);
1183         }
1184       if (i == 0)
1185         {
1186           inf_size -= to_read;
1187           break;
1188         }
1189       to_read -= i;
1190     }
1191
1192   close (inf_fd);
1193
1194   /* Inf_size may have changed if read was short (as on VMS) */
1195   inf_buffer[inf_size] = '\n';
1196   inf_buffer[inf_size + 1] = '\0';
1197   inf_limit = inf_buffer + inf_size;
1198
1199   /* If file doesn't end with '\n', add one.  */
1200   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1201     inf_limit++;
1202
1203   unlink (argv[3]);
1204   outf = fopen (argv[3], "w");
1205   if (outf == NULL)
1206     {
1207       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1208                progname, argv[3]);
1209       perror (NULL);
1210       exit (FATAL_EXIT_CODE);
1211     }
1212
1213   lineno = 1;
1214
1215   if (check_protection (&ifndef_line, &endif_line))
1216     {
1217       lbrac_line = ifndef_line+1;
1218       rbrac_line = endif_line;
1219     }
1220   else
1221     {
1222       lbrac_line = 1;
1223       rbrac_line = -1;
1224     }
1225
1226   /* Reset input file.  */
1227   inf_ptr = inf_buffer;
1228   lineno = 1;
1229
1230   for (;;)
1231     {
1232       if (lineno == lbrac_line)
1233         write_lbrac ();
1234       if (lineno == rbrac_line)
1235         write_rbrac ();
1236       for (;;)
1237         {
1238           struct fn_decl *fn;
1239           c = INF_GET ();
1240           if (c == EOF)
1241             break;
1242           if (ISIDST (c))
1243             {
1244               c = inf_scan_ident (&buf, c);
1245               (void) INF_UNGET (c);
1246               fputs (buf.base, outf);
1247               fn = lookup_std_proto (buf.base, strlen (buf.base));
1248               /* We only want to edit the declaration matching the one
1249                  seen by scan-decls, as there can be multiple
1250                  declarations, selected by #ifdef __STDC__ or whatever.  */
1251               if (fn && fn->partial && fn->partial->line_seen == lineno)
1252                 {
1253                   c = inf_skip_spaces (' ');
1254                   if (c == EOF)
1255                     break;
1256                   if (c == '(')
1257                     {
1258                       c = inf_skip_spaces (' ');
1259                       if (c == ')')
1260                         {
1261                           fprintf (outf, " _PARAMS((%s))", fn->params);
1262                         }
1263                       else
1264                         {
1265                           putc ('(', outf);
1266                           (void) INF_UNGET (c);
1267                         }
1268                     }
1269                   else
1270                     fprintf (outf, " %c", c);
1271                 }
1272             }
1273           else
1274             {
1275               putc (c, outf);
1276               if (c == '\n')
1277                 break;
1278             }
1279         }
1280       if (c == EOF)
1281         break;
1282       lineno++;
1283     }
1284   if (rbrac_line < 0)
1285     write_rbrac ();
1286
1287   fclose (outf);
1288
1289   return 0;
1290 }
1291 \f
1292
1293 static void
1294 v_fatal (const char *str, va_list ap)
1295 {
1296   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1297   vfprintf (stderr, str, ap);
1298   fprintf (stderr, "\n");
1299
1300   exit (FATAL_EXIT_CODE);
1301 }
1302
1303 static void
1304 fatal (const char *str, ...)
1305 {
1306   va_list ap;
1307
1308   va_start (ap, str);
1309   v_fatal (str, ap);
1310   va_end (ap);
1311 }