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 PARAMS ((const char *, va_list)) ATTRIBUTE_PRINTF (1,0) ATTRIBUTE_NORETURN;
  84 static void fatal PARAMS ((const char *, ...)) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  85
  86 sstring buf;
  87
  88 int verbose = 0;
  89 int partial_count = 0;
  90 int warnings = 0;
  91
  92 /* We no longer need to add extern "C", because cpp implicitly
  93    forces the standard include files to be treated as C.  */
  94 /*#define ADD_MISSING_EXTERN_C 1 */
  95
  96 #if ADD_MISSING_EXTERN_C
  97 int missing_extern_C_count = 0;
  98 #endif
  99
 100 #include "xsys-protos.h"
 101
 102 #ifdef FIXPROTO_IGNORE_LIST
 103 /* This is a currently unused feature.  */
 104
 105 /* List of files and directories to ignore.
 106    A directory name (ending in '/') means ignore anything in that
 107    directory.  (It might be more efficient to do directory pruning
 108    earlier in fixproto, but this is simpler and easier to customize.) */
 109
 110 static const char *const files_to_ignore[] = {
 111   "X11/",
 112   FIXPROTO_IGNORE_LIST
 113   0
 114 };
 115 #endif
 116
 117 char *inf_buffer;
 118 char *inf_limit;
 119 char *inf_ptr;
 120 static const char *cur_file;
 121
 122 /* Certain standard files get extra treatment */
 123
 124 enum special_file
 125 {
 126   no_special,
 127 #ifdef errno_h
 128 #undef errno_h
 129 #endif
 130   errno_h,
 131 #ifdef stdio_h
 132 #undef stdio_h
 133 #endif
 134   stdio_h,
 135 #ifdef stdlib_h
 136 #undef stdlib_h
 137 #endif
 138   stdlib_h,
 139 #ifdef sys_stat_h
 140 #undef sys_stat_h
 141 #endif
 142   sys_stat_h
 143 };
 144
 145 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 146    by an empty name (i.e. by "\0\0").  */
 147
 148 typedef const char *namelist;
 149
 150 /* The following macros provide the bits for symbol_flags.  */
 151 typedef int symbol_flags;
 152
 153 /* Used to mark names defined in the ANSI/ISO C standard.  */
 154 #define ANSI_SYMBOL 1
 155
 156 /* We no longer massage include files for POSIX or XOPEN symbols,
 157    as there are now several versions of the POSIX and XOPEN standards,
 158    and it would be a maintenance nightmare for us to track them all.
 159    Better to be compatible with the system include files.  */
 160 /*#define ADD_MISSING_POSIX 1 */
 161 /*#define ADD_MISSING_XOPEN 1 */
 162
 163 #if ADD_MISSING_POSIX
 164 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 165 #define POSIX1_SYMBOL 2
 166 #define POSIX2_SYMBOL 4
 167 #else
 168 #define POSIX1_SYMBOL 0
 169 #define POSIX2_SYMBOL 0
 170 #endif
 171
 172 #if ADD_MISSING_XOPEN
 173 /* Used to mark names defined in X/Open Portability Guide.  */
 174 #define XOPEN_SYMBOL 8
 175 /* Used to mark names defined in X/Open UNIX Extensions.  */
 176 #define XOPEN_EXTENDED_SYMBOL 16
 177 #else
 178 #define XOPEN_SYMBOL 0
 179 #define XOPEN_EXTENDED_SYMBOL 0
 180 #endif
 181
 182 /* Used to indicate names that are not functions */
 183 #define MACRO_SYMBOL 512
 184
 185 struct symbol_list {
 186   symbol_flags flags;
 187   namelist names;
 188 };
 189
 190 #define SYMBOL_TABLE_SIZE 10
 191 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 192 int cur_symbol_table_size;
 193
 194 static void add_symbols PARAMS ((symbol_flags, namelist));
 195 static struct fn_decl *lookup_std_proto PARAMS ((const char *, int));
 196 static void write_lbrac PARAMS ((void));
 197 static void recognized_macro PARAMS ((const char *));
 198 static void check_macro_names PARAMS ((cpp_reader *, namelist));
 199 static void read_scan_file PARAMS ((char *, int, char **));
 200 static void write_rbrac PARAMS ((void));
 201 static int inf_skip_spaces PARAMS ((int));
 202 static int inf_read_upto PARAMS ((sstring *, int));
 203 static int inf_scan_ident PARAMS ((sstring *, int));
 204 static int check_protection PARAMS ((int *, int *));
 205 static void cb_file_change PARAMS ((cpp_reader *, const struct line_map *));
 206
 207 static void
 208 add_symbols (flags, names)
 209      symbol_flags flags;
 210      namelist names;
 211 {
 212   symbol_table[cur_symbol_table_size].flags = flags;
 213   symbol_table[cur_symbol_table_size].names = names;
 214   cur_symbol_table_size++;
 215   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 216     fatal ("too many calls to add_symbols");
 217   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 218 }
 219
 220 struct std_include_entry {
 221   const char *const name;
 222   const symbol_flags flags;
 223   const namelist names;
 224 };
 225
 226 const char NONE[] = "";  /* The empty namelist.  */
 227
 228 /* Special name to indicate a continuation line in std_include_table.  */
 229 const char CONTINUED[] = "";
 230
 231 const struct std_include_entry *include_entry;
 232
 233 const struct std_include_entry std_include_table [] = {
 234   { "ctype.h", ANSI_SYMBOL,
 235       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 236 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 237
 238   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 239
 240   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 241
 242   /* ANSI_SYMBOL is wrong, but ...  */
 243   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 244 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 245 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 246 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 247 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 248
 249   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 250
 251   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 252   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 253
 254 /*{ "limit.h", ... provided by gcc }, */
 255
 256   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 257
 258   { "math.h", ANSI_SYMBOL,
 259       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 260 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 261 tan\0tanh\0" },
 262
 263   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 264
 265   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 266
 267   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 268   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 269
 270   /* Left out signal() - its prototype is too complex for us!
 271      Also left out "sigaction sigaddset sigdelset sigemptyset
 272      sigfillset sigismember sigpending sigprocmask sigsuspend"
 273      because these need sigset_t or struct sigaction.
 274      Most systems that provide them will also declare them.  */
 275   { "signal.h", ANSI_SYMBOL, "kill\0raise\0" },
 276
 277   { "stdio.h", ANSI_SYMBOL,
 278       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 279 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 280 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 281 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 282 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 283 tmpnam\0ungetc\0" },
 284   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 285   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 286 /* Should perhaps also handle NULL, EOF, ... ? */
 287
 288   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 289      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 290      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 291      Should perhaps also add NULL */
 292   { "stdlib.h", ANSI_SYMBOL,
 293       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 294 exit\0free\0getenv\0labs\0malloc\0putenv\0qsort\0rand\0realloc\0\
 295 srand\0strtod\0strtol\0strtoul\0system\0" },
 296   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 297
 298   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 299 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 300 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 301 strtok\0strxfrm\0" },
 302 /* Should perhaps also add NULL and size_t */
 303
 304   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 305       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 306
 307   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 308
 309   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 310      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 311      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 312   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 313
 314   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 315
 316   { "sys/stat.h", POSIX1_SYMBOL,
 317       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 318   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 319       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 320 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 321   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 322
 323 #if 0
 324 /* How do we handle fd_set? */
 325   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 326   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 327 #endif
 328
 329   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 330   /* "sys/types.h" add types (not in old g++-include) */
 331
 332   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 333
 334   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 335   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 336       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 337 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 338
 339   { "tar.h", POSIX1_SYMBOL, NONE },
 340
 341   { "termios.h", POSIX1_SYMBOL,
 342       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 343
 344   { "time.h", ANSI_SYMBOL,
 345       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0tzset\0" },
 346
 347   { "unistd.h", POSIX1_SYMBOL,
 348       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 349 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 350 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 351 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 352 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 353 ttyname\0unlink\0write\0" },
 354   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 355   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 356       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 357
 358   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 359
 360   { NULL, 0, NONE }
 361 };
 362
 363 enum special_file special_file_handling = no_special;
 364
 365 /* They are set if the corresponding macro has been seen.  */
 366 /* The following are only used when handling sys/stat.h */
 367 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 368 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 369 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 370 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 371 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 372 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 373 /* The following are only used when handling errno.h */
 374 int seen_errno = 0;
 375 /* The following are only used when handling stdlib.h */
 376 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 377 \f
 378 struct obstack scan_file_obstack;
 379
 380 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 381
 382 static struct fn_decl *
 383 lookup_std_proto (name, name_length)
 384      const char *name;
 385      int name_length;
 386 {
 387   int i = hashstr (name, name_length) % HASH_SIZE;
 388   int i0 = i;
 389   for (;;)
 390     {
 391       struct fn_decl *fn;
 392       if (hash_tab[i] == 0)
 393         return NULL;
 394       fn = &std_protos[hash_tab[i]];
 395       if ((int) strlen (fn->fname) == name_length
 396           && strncmp (fn->fname, name, name_length) == 0)
 397         return fn;
 398       i = (i+1) % HASH_SIZE;
 399       if (i == i0)
 400         abort ();
 401     }
 402 }
 403
 404 char *inc_filename;
 405 int inc_filename_length;
 406 const char *progname = "fix-header";
 407 FILE *outf;
 408 sstring line;
 409
 410 int lbrac_line, rbrac_line;
 411
 412 int required_unseen_count = 0;
 413 int required_other = 0;
 414
 415 static void
 416 write_lbrac ()
 417 {
 418
 419 #if ADD_MISSING_EXTERN_C
 420   if (missing_extern_C_count + required_unseen_count > 0)
 421     fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 422 #endif
 423
 424   if (partial_count)
 425     {
 426       fprintf (outf, "#ifndef _PARAMS\n");
 427       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 428       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 429       fprintf (outf, "#else\n");
 430       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 431       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 432     }
 433 }
 434
 435 struct partial_proto
 436 {
 437   struct partial_proto *next;
 438   struct fn_decl *fn;
 439   int line_seen;
 440 };
 441
 442 struct partial_proto *partial_proto_list = NULL;
 443
 444 struct partial_proto required_dummy_proto, seen_dummy_proto;
 445 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 446 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 447 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 448 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 449
 450 static void
 451 recognized_macro (fname)
 452      const char *fname;
 453 {
 454   /* The original include file defines fname as a macro.  */
 455   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 456
 457   /* Since fname is a macro, don't require a prototype for it.  */
 458   if (fn)
 459     {
 460       if (REQUIRED (fn))
 461         required_unseen_count--;
 462       SET_SEEN (fn);
 463     }
 464
 465   switch (special_file_handling)
 466     {
 467     case errno_h:
 468       if (strcmp (fname, "errno") == 0 && !seen_errno)
 469         seen_errno = 1, required_other--;
 470       break;
 471     case stdlib_h:
 472       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 473         seen_EXIT_FAILURE = 1, required_other--;
 474       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 475         seen_EXIT_SUCCESS = 1, required_other--;
 476       break;
 477     case sys_stat_h:
 478       if (fname[0] == 'S' && fname[1] == '_')
 479         {
 480           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 481           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 482           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 483           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 484           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 485           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 486           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 487           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 488           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 489           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 490           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 491           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 492         }
 493       break;
 494
 495     default:
 496       break;
 497     }
 498 }
 499
 500 void
 501 recognized_extern (name)
 502      const cpp_token *name;
 503 {
 504   switch (special_file_handling)
 505     {
 506     case errno_h:
 507       if (cpp_ideq (name, "errno"))
 508         seen_errno = 1, required_other--;
 509       break;
 510
 511     default:
 512       break;
 513     }
 514 }
 515
 516 /* Called by scan_decls if it saw a function definition for a function
 517    named FNAME.  KIND is 'I' for an inline function; 'F' if a normal
 518    function declaration preceded by 'extern "C"' (or nested inside
 519    'extern "C"' braces); or 'f' for other function declarations.  */
 520
 521 void
 522 recognized_function (fname, line, kind, have_arg_list)
 523      const cpp_token *fname;
 524      unsigned int line;
 525      int kind; /* One of 'f' 'F' or 'I' */
 526      int have_arg_list;
 527 {
 528   struct partial_proto *partial;
 529   int i;
 530   struct fn_decl *fn;
 531 #if ADD_MISSING_EXTERN_C
 532   if (kind == 'f')
 533     missing_extern_C_count++;
 534 #endif
 535
 536   fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
 537                          NODE_LEN (fname->val.node));
 538
 539   /* Remove the function from the list of required function.  */
 540   if (fn)
 541     {
 542       if (REQUIRED (fn))
 543         required_unseen_count--;
 544       SET_SEEN (fn);
 545     }
 546
 547   /* If we have a full prototype, we're done.  */
 548   if (have_arg_list)
 549     return;
 550
 551   if (kind == 'I')  /* don't edit inline function */
 552     return;
 553
 554   /* If the partial prototype was included from some other file,
 555      we don't need to patch it up (in this run).  */
 556   i = strlen (cur_file);
 557   if (i < inc_filename_length
 558       || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
 559     return;
 560
 561   if (fn == NULL)
 562     return;
 563   if (fn->params[0] == '\0')
 564     return;
 565
 566   /* We only have a partial function declaration,
 567      so remember that we have to add a complete prototype.  */
 568   partial_count++;
 569   partial = (struct partial_proto *)
 570     obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 571   partial->line_seen = line;
 572   partial->fn = fn;
 573   fn->partial = partial;
 574   partial->next = partial_proto_list;
 575   partial_proto_list = partial;
 576   if (verbose)
 577     {
 578       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 579                inc_filename, fn->fname);
 580     }
 581 }
 582
 583 /* For any name in NAMES that is defined as a macro,
 584    call recognized_macro on it.  */
 585
 586 static void
 587 check_macro_names (pfile, names)
 588      cpp_reader *pfile;
 589      namelist names;
 590 {
 591   size_t len;
 592   while (*names)
 593     {
 594       len = strlen (names);
 595       if (cpp_defined (pfile, (const unsigned char *)names, len))
 596         recognized_macro (names);
 597       names += len + 1;
 598     }
 599 }
 600
 601 static void
 602 cb_file_change (pfile, map)
 603      cpp_reader *pfile ATTRIBUTE_UNUSED;
 604      const struct line_map *map;
 605 {
 606   /* Just keep track of current file name.  */
 607   cur_file = map->to_file;
 608 }
 609
 610 static void
 611 read_scan_file (in_fname, argc, argv)
 612      char *in_fname;
 613      int argc;
 614      char **argv;
 615 {
 616   cpp_reader *scan_in;
 617   cpp_callbacks *cb;
 618   cpp_options *options;
 619   struct fn_decl *fn;
 620   int i, strings_processed;
 621   struct symbol_list *cur_symbols;
 622
 623   obstack_init (&scan_file_obstack);
 624
 625   scan_in = cpp_create_reader (CLK_GNUC89, NULL);
 626   cb = cpp_get_callbacks (scan_in);
 627   cb->file_change = cb_file_change;
 628
 629   /* We are going to be scanning a header file out of its proper context,
 630      so ignore warnings and errors.  */
 631   options = cpp_get_options (scan_in);
 632   options->inhibit_warnings = 1;
 633   options->inhibit_errors = 1;
 634
 635   if (! cpp_read_main_file (scan_in, in_fname))
 636     exit (FATAL_EXIT_CODE);
 637
 638   cpp_change_file (scan_in, LC_RENAME, "<built-in>");
 639   cpp_init_builtins (scan_in);
 640   cpp_change_file (scan_in, LC_RENAME, in_fname);
 641
 642   /* Process switches after builtins so -D can override them.  */
 643   for (i = 0; i < argc; i += strings_processed)
 644     {
 645       strings_processed = 0;
 646       if (argv[i][0] == '-')
 647         {
 648           if (argv[i][1] == 'I')
 649             {
 650               if (argv[i][2] != '\0')
 651                 {
 652                   strings_processed = 1;
 653                   add_path (xstrdup (argv[i] + 2), BRACKET, false);
 654                 }
 655               else if (i + 1 != argc)
 656                 {
 657                   strings_processed = 2;
 658                   add_path (xstrdup (argv[i + 1]), BRACKET, false);
 659                 }
 660             }
 661           else if (argv[i][1] == 'D')
 662             {
 663               if (argv[i][2] != '\0')
 664                 strings_processed = 1, cpp_define (scan_in, argv[i] + 2);
 665               else if (i + 1 != argc)
 666                 strings_processed = 2, cpp_define (scan_in, argv[i + 1]);
 667             }
 668         }
 669
 670       if (strings_processed == 0)
 671         break;
 672     }
 673
 674   if (i < argc)
 675     cpp_error (scan_in, DL_ERROR, "invalid option `%s'", argv[i]);
 676   if (cpp_errors (scan_in))
 677     exit (FATAL_EXIT_CODE);
 678
 679   register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
 680                            true /* stdinc */, false /* cxx_stdinc */,
 681                            false /* verbose */);
 682
 683   /* We are scanning a system header, so mark it as such.  */
 684   cpp_make_system_header (scan_in, 1, 0);
 685
 686   scan_decls (scan_in, argc, argv);
 687   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 688     check_macro_names (scan_in, cur_symbols->names);
 689
 690   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 691      If so, those functions are also required.  */
 692   if (special_file_handling == stdio_h
 693       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 694     {
 695       unsigned char getchar_call[] = "getchar();\n";
 696       int seen_filbuf = 0;
 697
 698       /* Scan the macro expansion of "getchar();".  */
 699       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 700                        /* from_stage3 */ true, 1);
 701       for (;;)
 702         {
 703           const cpp_token *t = cpp_get_token (scan_in);
 704
 705           if (t->type == CPP_EOF)
 706             break;
 707           else if (cpp_ideq (t, "_filbuf"))
 708             seen_filbuf++;
 709         }
 710
 711       if (seen_filbuf)
 712         {
 713           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 714           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 715           int need_flsbuf
 716             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 717
 718           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 719           if (need_filbuf + need_flsbuf)
 720             {
 721               const char *new_list;
 722               if (need_filbuf)
 723                 SET_REQUIRED (fn);
 724               if (need_flsbuf)
 725                 SET_REQUIRED (flsbuf_fn);
 726               if (need_flsbuf && need_filbuf)
 727                 new_list = "_filbuf\0_flsbuf\0";
 728               else if (need_flsbuf)
 729                 new_list = "_flsbuf\0";
 730               else /* if (need_flsbuf) */
 731                 new_list = "_filbuf\0";
 732               add_symbols (ANSI_SYMBOL, new_list);
 733               required_unseen_count += need_filbuf + need_flsbuf;
 734             }
 735         }
 736     }
 737
 738   if (required_unseen_count + partial_count + required_other
 739 #if ADD_MISSING_EXTERN_C
 740       + missing_extern_C_count
 741 #endif
 742       == 0)
 743     {
 744       if (verbose)
 745         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 746       exit (SUCCESS_EXIT_CODE);
 747     }
 748   if (!verbose)
 749     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 750   else
 751     {
 752       if (required_unseen_count)
 753         fprintf (stderr, "%s: %d missing function declarations.\n",
 754                  inc_filename, required_unseen_count);
 755       if (partial_count)
 756         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 757                  inc_filename, partial_count);
 758 #if ADD_MISSING_EXTERN_C
 759       if (missing_extern_C_count)
 760         fprintf (stderr,
 761                  "%s: %d declarations not protected by extern \"C\".\n",
 762                  inc_filename, missing_extern_C_count);
 763 #endif
 764     }
 765 }
 766
 767 static void
 768 write_rbrac ()
 769 {
 770   struct fn_decl *fn;
 771   const char *cptr;
 772   struct symbol_list *cur_symbols;
 773
 774   if (required_unseen_count)
 775     {
 776 #ifdef NO_IMPLICIT_EXTERN_C
 777       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 778 #endif
 779     }
 780
 781   /* Now we print out prototypes for those functions that we haven't seen.  */
 782   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 783     {
 784       int if_was_emitted = 0;
 785       int name_len;
 786       cptr = cur_symbols->names;
 787       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 788         {
 789           int macro_protect = 0;
 790
 791           if (cur_symbols->flags & MACRO_SYMBOL)
 792             continue;
 793
 794           fn = lookup_std_proto (cptr, name_len);
 795           if (fn == NULL || !REQUIRED (fn))
 796             continue;
 797
 798           if (!if_was_emitted)
 799             {
 800 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 801               if (cur_symbols->flags & ANSI_SYMBOL)
 802                 fprintf (outf,
 803          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 804               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 805                 fprintf (outf,
 806        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 807     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 808     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 809               else if (cur_symbols->flags & XOPEN_SYMBOL)
 810                 {
 811                 fprintf (outf,
 812        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 813    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 814                 }
 815               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 816                 {
 817                 fprintf (outf,
 818        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 819    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 820                 }
 821               else
 822                 {
 823                   fatal ("internal error for function %s", fn->fname);
 824                 }
 825               if_was_emitted = 1;
 826             }
 827
 828           /* In the case of memmove, protect in case the application
 829              defines it as a macro before including the header.  */
 830           if (!strcmp (fn->fname, "memmove")
 831               || !strcmp (fn->fname, "putc")
 832               || !strcmp (fn->fname, "getc")
 833               || !strcmp (fn->fname, "vprintf")
 834               || !strcmp (fn->fname, "vfprintf")
 835               || !strcmp (fn->fname, "vsprintf")
 836               || !strcmp (fn->fname, "rewinddir")
 837               || !strcmp (fn->fname, "abort"))
 838             macro_protect = 1;
 839
 840           if (macro_protect)
 841             fprintf (outf, "#ifndef %s\n", fn->fname);
 842           fprintf (outf, "extern %s %s (%s);\n",
 843                    fn->rtype, fn->fname, fn->params);
 844           if (macro_protect)
 845             fprintf (outf, "#endif\n");
 846         }
 847       if (if_was_emitted)
 848         fprintf (outf,
 849                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 850     }
 851   if (required_unseen_count)
 852     {
 853 #ifdef NO_IMPLICIT_EXTERN_C
 854       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 855 #endif
 856     }
 857
 858   switch (special_file_handling)
 859     {
 860     case errno_h:
 861       if (!seen_errno)
 862         fprintf (outf, "extern int errno;\n");
 863       break;
 864     case stdlib_h:
 865       if (!seen_EXIT_FAILURE)
 866         fprintf (outf, "#define EXIT_FAILURE 1\n");
 867       if (!seen_EXIT_SUCCESS)
 868         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 869       break;
 870     case sys_stat_h:
 871       if (!seen_S_ISBLK && seen_S_IFBLK)
 872         fprintf (outf,
 873                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 874       if (!seen_S_ISCHR && seen_S_IFCHR)
 875         fprintf (outf,
 876                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 877       if (!seen_S_ISDIR && seen_S_IFDIR)
 878         fprintf (outf,
 879                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 880       if (!seen_S_ISFIFO && seen_S_IFIFO)
 881         fprintf (outf,
 882                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 883       if (!seen_S_ISLNK && seen_S_IFLNK)
 884         fprintf (outf,
 885                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 886       if (!seen_S_ISREG && seen_S_IFREG)
 887         fprintf (outf,
 888                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 889       break;
 890
 891     default:
 892       break;
 893     }
 894
 895
 896 #if ADD_MISSING_EXTERN_C
 897   if (missing_extern_C_count + required_unseen_count > 0)
 898     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 899 #endif
 900 }
 901
 902 /* Returns 1 iff the file is properly protected from multiple inclusion:
 903    #ifndef PROTECT_NAME
 904    #define PROTECT_NAME
 905    #endif
 906
 907  */
 908
 909 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 910 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 911
 912 static int
 913 inf_skip_spaces (c)
 914      int c;
 915 {
 916   for (;;)
 917     {
 918       if (c == ' ' || c == '\t')
 919         c = INF_GET ();
 920       else if (c == '/')
 921         {
 922           c = INF_GET ();
 923           if (c != '*')
 924             {
 925               (void) INF_UNGET (c);
 926               return '/';
 927             }
 928           c = INF_GET ();
 929           for (;;)
 930             {
 931               if (c == EOF)
 932                 return EOF;
 933               else if (c != '*')
 934                 {
 935                   if (c == '\n')
 936                     source_lineno++, lineno++;
 937                   c = INF_GET ();
 938                 }
 939               else if ((c = INF_GET ()) == '/')
 940                 return INF_GET ();
 941             }
 942         }
 943       else
 944         break;
 945     }
 946   return c;
 947 }
 948
 949 /* Read into STR from inf_buffer upto DELIM.  */
 950
 951 static int
 952 inf_read_upto (str, delim)
 953      sstring *str;
 954      int delim;
 955 {
 956   int ch;
 957   for (;;)
 958     {
 959       ch = INF_GET ();
 960       if (ch == EOF || ch == delim)
 961         break;
 962       SSTRING_PUT (str, ch);
 963     }
 964   MAKE_SSTRING_SPACE (str, 1);
 965   *str->ptr = 0;
 966   return ch;
 967 }
 968
 969 static int
 970 inf_scan_ident (s, c)
 971      sstring *s;
 972      int c;
 973 {
 974   s->ptr = s->base;
 975   if (ISIDST (c))
 976     {
 977       for (;;)
 978         {
 979           SSTRING_PUT (s, c);
 980           c = INF_GET ();
 981           if (c == EOF || !(ISIDNUM (c)))
 982             break;
 983         }
 984     }
 985   MAKE_SSTRING_SPACE (s, 1);
 986   *s->ptr = 0;
 987   return c;
 988 }
 989
 990 /* Returns 1 if the file is correctly protected against multiple
 991    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 992    and setting *endif_line to the final #endif.
 993    Otherwise return 0.  */
 994
 995 static int
 996 check_protection (ifndef_line, endif_line)
 997      int *ifndef_line, *endif_line;
 998 {
 999   int c;
1000   int if_nesting = 1; /* Level of nesting of #if's */
1001   char *protect_name = NULL; /* Identifier following initial #ifndef */
1002   int define_seen = 0;
1003
1004   /* Skip initial white space (including comments).  */
1005   for (;; lineno++)
1006     {
1007       c = inf_skip_spaces (' ');
1008       if (c == EOF)
1009         return 0;
1010       if (c != '\n')
1011         break;
1012     }
1013   if (c != '#')
1014     return 0;
1015   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1016   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
1017     return 0;
1018
1019   /* So far so good: We've seen an initial #ifndef.  */
1020   *ifndef_line = lineno;
1021   c = inf_scan_ident (&buf, inf_skip_spaces (c));
1022   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
1023     return 0;
1024   protect_name = xstrdup (buf.base);
1025
1026   (void) INF_UNGET (c);
1027   c = inf_read_upto (&buf, '\n');
1028   if (c == EOF)
1029     return 0;
1030   lineno++;
1031
1032   for (;;)
1033     {
1034       c = inf_skip_spaces (' ');
1035       if (c == EOF)
1036         return 0;
1037       if (c == '\n')
1038         {
1039           lineno++;
1040           continue;
1041         }
1042       if (c != '#')
1043         goto skip_to_eol;
1044       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1045       if (SSTRING_LENGTH (&buf) == 0)
1046         ;
1047       else if (!strcmp (buf.base, "ifndef")
1048           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1049         {
1050           if_nesting++;
1051         }
1052       else if (!strcmp (buf.base, "endif"))
1053         {
1054           if_nesting--;
1055           if (if_nesting == 0)
1056             break;
1057         }
1058       else if (!strcmp (buf.base, "else"))
1059         {
1060           if (if_nesting == 1)
1061             return 0;
1062         }
1063       else if (!strcmp (buf.base, "define"))
1064         {
1065           c = inf_skip_spaces (c);
1066           c = inf_scan_ident (&buf, c);
1067           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1068             define_seen = 1;
1069         }
1070     skip_to_eol:
1071       for (;;)
1072         {
1073           if (c == '\n' || c == EOF)
1074             break;
1075           c = INF_GET ();
1076         }
1077       if (c == EOF)
1078         return 0;
1079       lineno++;
1080     }
1081
1082   if (!define_seen)
1083      return 0;
1084   *endif_line = lineno;
1085   /* Skip final white space (including comments).  */
1086   for (;;)
1087     {
1088       c = inf_skip_spaces (' ');
1089       if (c == EOF)
1090         break;
1091       if (c != '\n')
1092         return 0;
1093     }
1094
1095   return 1;
1096 }
1097
1098 extern int main                 PARAMS ((int, char **));
1099
1100 int
1101 main (argc, argv)
1102      int argc;
1103      char **argv;
1104 {
1105   int inf_fd;
1106   struct stat sbuf;
1107   int c;
1108 #ifdef FIXPROTO_IGNORE_LIST
1109   int i;
1110 #endif
1111   const char *cptr;
1112   int ifndef_line;
1113   int endif_line;
1114   long to_read;
1115   long int inf_size;
1116   struct symbol_list *cur_symbols;
1117
1118   if (argv[0] && argv[0][0])
1119     {
1120       char *p;
1121
1122       progname = 0;
1123       for (p = argv[0]; *p; p++)
1124         if (*p == '/')
1125           progname = p;
1126       progname = progname ? progname+1 : argv[0];
1127     }
1128
1129   if (argc < 4)
1130     {
1131       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1132                progname);
1133       exit (FATAL_EXIT_CODE);
1134     }
1135
1136   inc_filename = argv[1];
1137   inc_filename_length = strlen (inc_filename);
1138
1139 #ifdef FIXPROTO_IGNORE_LIST
1140   for (i = 0; files_to_ignore[i] != NULL; i++)
1141     {
1142       const char *const ignore_name = files_to_ignore[i];
1143       int ignore_len = strlen (ignore_name);
1144       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1145         {
1146           if (ignore_name[ignore_len-1] == '/'
1147               || inc_filename[ignore_len] == '\0')
1148             {
1149               if (verbose)
1150                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1151               exit (SUCCESS_EXIT_CODE);
1152             }
1153         }
1154
1155     }
1156 #endif
1157
1158   if (strcmp (inc_filename, "sys/stat.h") == 0)
1159     special_file_handling = sys_stat_h;
1160   else if (strcmp (inc_filename, "errno.h") == 0)
1161     special_file_handling = errno_h, required_other++;
1162   else if (strcmp (inc_filename, "stdlib.h") == 0)
1163     special_file_handling = stdlib_h, required_other+=2;
1164   else if (strcmp (inc_filename, "stdio.h") == 0)
1165     special_file_handling = stdio_h;
1166   include_entry = std_include_table;
1167   while (include_entry->name != NULL
1168          && ((strcmp (include_entry->name, CONTINUED) == 0)
1169              || strcmp (inc_filename, include_entry->name) != 0))
1170     include_entry++;
1171
1172   if (include_entry->name != NULL)
1173     {
1174       const struct std_include_entry *entry;
1175       cur_symbol_table_size = 0;
1176       for (entry = include_entry; ;)
1177         {
1178           if (entry->flags)
1179             add_symbols (entry->flags, entry->names);
1180           entry++;
1181           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1182             break;
1183         }
1184     }
1185   else
1186     symbol_table[0].names = NULL;
1187
1188   /* Count and mark the prototypes required for this include file.  */
1189   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1190     {
1191       int name_len;
1192       if (cur_symbols->flags & MACRO_SYMBOL)
1193         continue;
1194       cptr = cur_symbols->names;
1195       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1196         {
1197           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1198           required_unseen_count++;
1199           if (fn == NULL)
1200             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1201           else
1202             SET_REQUIRED (fn);
1203         }
1204     }
1205
1206   read_scan_file (argv[2], argc - 4, argv + 4);
1207
1208   inf_fd = open (argv[2], O_RDONLY, 0666);
1209   if (inf_fd < 0)
1210     {
1211       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1212                progname, argv[2]);
1213       perror (NULL);
1214       exit (FATAL_EXIT_CODE);
1215     }
1216   if (fstat (inf_fd, &sbuf) < 0)
1217     {
1218       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1219       perror (NULL);
1220       exit (FATAL_EXIT_CODE);
1221     }
1222   inf_size = sbuf.st_size;
1223   inf_buffer = (char *) xmalloc (inf_size + 2);
1224   inf_ptr = inf_buffer;
1225
1226   to_read = inf_size;
1227   while (to_read > 0)
1228     {
1229       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1230       if (i < 0)
1231         {
1232           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1233           perror (NULL);
1234           exit (FATAL_EXIT_CODE);
1235         }
1236       if (i == 0)
1237         {
1238           inf_size -= to_read;
1239           break;
1240         }
1241       to_read -= i;
1242     }
1243
1244   close (inf_fd);
1245
1246   /* Inf_size may have changed if read was short (as on VMS) */
1247   inf_buffer[inf_size] = '\n';
1248   inf_buffer[inf_size + 1] = '\0';
1249   inf_limit = inf_buffer + inf_size;
1250
1251   /* If file doesn't end with '\n', add one.  */
1252   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1253     inf_limit++;
1254
1255   unlink (argv[3]);
1256   outf = fopen (argv[3], "w");
1257   if (outf == NULL)
1258     {
1259       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1260                progname, argv[3]);
1261       perror (NULL);
1262       exit (FATAL_EXIT_CODE);
1263     }
1264
1265   lineno = 1;
1266
1267   if (check_protection (&ifndef_line, &endif_line))
1268     {
1269       lbrac_line = ifndef_line+1;
1270       rbrac_line = endif_line;
1271     }
1272   else
1273     {
1274       lbrac_line = 1;
1275       rbrac_line = -1;
1276     }
1277
1278   /* Reset input file.  */
1279   inf_ptr = inf_buffer;
1280   lineno = 1;
1281
1282   for (;;)
1283     {
1284       if (lineno == lbrac_line)
1285         write_lbrac ();
1286       if (lineno == rbrac_line)
1287         write_rbrac ();
1288       for (;;)
1289         {
1290           struct fn_decl *fn;
1291           c = INF_GET ();
1292           if (c == EOF)
1293             break;
1294           if (ISIDST (c))
1295             {
1296               c = inf_scan_ident (&buf, c);
1297               (void) INF_UNGET (c);
1298               fputs (buf.base, outf);
1299               fn = lookup_std_proto (buf.base, strlen (buf.base));
1300               /* We only want to edit the declaration matching the one
1301                  seen by scan-decls, as there can be multiple
1302                  declarations, selected by #ifdef __STDC__ or whatever.  */
1303               if (fn && fn->partial && fn->partial->line_seen == lineno)
1304                 {
1305                   c = inf_skip_spaces (' ');
1306                   if (c == EOF)
1307                     break;
1308                   if (c == '(')
1309                     {
1310                       c = inf_skip_spaces (' ');
1311                       if (c == ')')
1312                         {
1313                           fprintf (outf, " _PARAMS((%s))", fn->params);
1314                         }
1315                       else
1316                         {
1317                           putc ('(', outf);
1318                           (void) INF_UNGET (c);
1319                         }
1320                     }
1321                   else
1322                     fprintf (outf, " %c", c);
1323                 }
1324             }
1325           else
1326             {
1327               putc (c, outf);
1328               if (c == '\n')
1329                 break;
1330             }
1331         }
1332       if (c == EOF)
1333         break;
1334       lineno++;
1335     }
1336   if (rbrac_line < 0)
1337     write_rbrac ();
1338
1339   fclose (outf);
1340
1341   return 0;
1342 }
1343 \f
1344
1345 static void
1346 v_fatal (str, ap)
1347   const char * str;
1348   va_list ap;
1349 {
1350   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1351   vfprintf (stderr, str, ap);
1352   fprintf (stderr, "\n");
1353
1354   exit (FATAL_EXIT_CODE);
1355 }
1356
1357 static void
1358 fatal VPARAMS ((const char *str, ...))
1359 {
1360   VA_OPEN (ap, str);
1361   VA_FIXEDARG (ap, const char *, str);
1362
1363   v_fatal (str, ap);
1364   VA_CLOSE (ap);
1365 }