gcc/fix-header.c

   1 /* fix-header.c - Make C header file suitable for C++.
   2    Copyright (C) 1993, 94-98, 1999 Free Software Foundation, Inc.
   3
   4 This program is free software; you can redistribute it and/or modify it
   5 under the terms of the GNU General Public License as published by the
   6 Free Software Foundation; either version 2, or (at your option) any
   7 later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* This program massages a system include file (such as stdio.h),
  19    into a form that is compatible with GNU C and GNU C++.
  20
  21    * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
  22    if they seem to be needed.  These prevent C++ compilers from name
  23    mangling the functions inside the braces.
  24
  25    * If an old-style incomplete function declaration is seen (without
  26    an argument list), and it is a "standard" function listed in
  27    the file sys-protos.h (and with a non-empty argument list), then
  28    the declaration is converted to a complete prototype by replacing
  29    the empty parameter list with the argument list from sys-protos.h.
  30
  31    * The program can be given a list of (names of) required standard
  32    functions (such as fclose for stdio.h).  If a required function
  33    is not seen in the input, then a prototype for it will be
  34    written to the output.
  35
  36    * If all of the non-comment code of the original file is protected
  37    against multiple inclusion:
  38         #ifndef FOO
  39         #define FOO
  40         <body of include file>
  41         #endif
  42    then extra matter added to the include file is placed inside the <body>.
  43
  44    * If the input file is OK (nothing needs to be done);
  45    the output file is not written (nor removed if it exists).
  46
  47    There are also some special actions that are done for certain
  48    well-known standard include files:
  49
  50    * If argv[1] is "sys/stat.h", the Posix.1 macros
  51    S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
  52    they were missing, and the corresponding "traditional" S_IFxxx
  53    macros were defined.
  54
  55    * If argv[1] is "errno.h", errno is declared if it was missing.
  56
  57    * TODO:  The input file should be read complete into memory, because:
  58    a) it needs to be scanned twice anyway, and
  59    b) it would be nice to allow update in place.
  60
  61    Usage:
  62         fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
  63    where:
  64    * FOO.H is the relative file name of the include file,
  65    as it would be #include'd by a C file.  (E.g. stdio.h)
  66    * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
  67    * OUTFILE.H is the full pathname for where to write the output file,
  68    if anything needs to be done.  (e.g. ./include/stdio.h)
  69    * OPTIONS are such as you would pass to cpp.
  70
  71    Written by Per Bothner <bothner@cygnus.com>, July 1993.  */
  72
  73 #include "hconfig.h"
  74 #include "system.h"
  75 #include "obstack.h"
  76 #include "scan.h"
  77 #include "cpplib.h"
  78 #include "cpphash.h"
  79
  80 static void v_fatal PROTO ((const char *, va_list)) ATTRIBUTE_NORETURN;
  81 static void fatal PVPROTO ((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 PROTO ((symbol_flags, namelist));
 191 static struct fn_decl *lookup_std_proto PROTO ((const char *, int));
 192 static void write_lbrac PROTO ((void));
 193 static void recognized_macro PROTO ((const char *));
 194 static void check_macro_names PROTO ((cpp_reader *, namelist));
 195 static void read_scan_file PROTO ((char *, int, char **));
 196 static void write_rbrac PROTO ((void));
 197 static int inf_skip_spaces PROTO ((int));
 198 static int inf_read_upto PROTO ((sstring *, int));
 199 static int inf_scan_ident PROTO ((sstring *, int));
 200 static int check_protection PROTO ((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 = hashf (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   char *fname;  /* name of function */
 436   char *rtype;  /* return type */
 437   struct fn_decl *fn;
 438   int line_seen;
 439 };
 440
 441 struct partial_proto *partial_proto_list = NULL;
 442
 443 struct partial_proto required_dummy_proto, seen_dummy_proto;
 444 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 445 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 446 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 447 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 448
 449 static void
 450 recognized_macro (fname)
 451      const char *fname;
 452 {
 453   /* The original include file defines fname as a macro.  */
 454   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 455
 456   /* Since fname is a macro, don't require a prototype for it.  */
 457   if (fn)
 458     {
 459       if (REQUIRED (fn))
 460         required_unseen_count--;
 461       SET_SEEN (fn);
 462     }
 463
 464   switch (special_file_handling)
 465     {
 466     case errno_h:
 467       if (strcmp (fname, "errno") == 0 && !seen_errno)
 468         seen_errno = 1, required_other--;
 469       break;
 470     case stdlib_h:
 471       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 472         seen_EXIT_FAILURE = 1, required_other--;
 473       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 474         seen_EXIT_SUCCESS = 1, required_other--;
 475       break;
 476     case sys_stat_h:
 477       if (fname[0] == 'S' && fname[1] == '_')
 478         {
 479           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 480           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 481           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 482           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 483           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 484           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 485           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 486           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 487           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 488           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 489           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 490           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 491         }
 492       break;
 493
 494     default:
 495       break;
 496     }
 497 }
 498
 499 void
 500 recognized_extern (name, name_length, type, type_length)
 501      char *name;
 502      char *type ATTRIBUTE_UNUSED;
 503      int name_length, type_length ATTRIBUTE_UNUSED;
 504 {
 505   switch (special_file_handling)
 506     {
 507     case errno_h:
 508       if (name_length == 5 && strncmp (name, "errno", 5) == 0 && !seen_errno)
 509         seen_errno = 1, required_other--;
 510       break;
 511
 512     default:
 513       break;
 514     }
 515 }
 516
 517 /* Called by scan_decls if it saw a function definition for a function
 518    named FNAME, with return type RTYPE, and argument list ARGS,
 519    in source file FILE_SEEN on line LINE_SEEN.
 520    KIND is 'I' for an inline function;
 521    'F' if a normal function declaration preceded by 'extern "C"'
 522    (or nested inside 'extern "C"' braces); or
 523    'f' for other function declarations.  */
 524
 525 void
 526 recognized_function (fname, fname_length,
 527                      kind, rtype, rtype_length,
 528                      have_arg_list, file_seen, line_seen)
 529      char *fname;
 530      int fname_length;
 531      int kind; /* One of 'f' 'F' or 'I' */
 532      char *rtype;
 533      int rtype_length;
 534      int have_arg_list;
 535      char *file_seen;
 536      int line_seen;
 537 {
 538   struct partial_proto *partial;
 539   int i;
 540   struct fn_decl *fn;
 541 #if ADD_MISSING_EXTERN_C
 542   if (kind == 'f')
 543     missing_extern_C_count++;
 544 #endif
 545
 546   fn = lookup_std_proto (fname, fname_length);
 547
 548   /* Remove the function from the list of required function.  */
 549   if (fn)
 550     {
 551       if (REQUIRED (fn))
 552         required_unseen_count--;
 553       SET_SEEN (fn);
 554     }
 555
 556   /* If we have a full prototype, we're done.  */
 557   if (have_arg_list)
 558     return;
 559
 560   if (kind == 'I')  /* don't edit inline function */
 561     return;
 562
 563   /* If the partial prototype was included from some other file,
 564      we don't need to patch it up (in this run).  */
 565   i = strlen (file_seen);
 566   if (i < inc_filename_length
 567       || strcmp (inc_filename, file_seen + (i - inc_filename_length)) != 0)
 568     return;
 569
 570   if (fn == NULL)
 571     return;
 572   if (fn->params[0] == '\0' || strcmp (fn->params, "void") == 0)
 573     return;
 574
 575   /* We only have a partial function declaration,
 576      so remember that we have to add a complete prototype.  */
 577   partial_count++;
 578   partial = (struct partial_proto *)
 579     obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 580   partial->fname = obstack_alloc (&scan_file_obstack, fname_length + 1);
 581   bcopy (fname, partial->fname, fname_length);
 582   partial->fname[fname_length] = 0;
 583   partial->rtype = obstack_alloc (&scan_file_obstack, rtype_length + 1);
 584   sprintf (partial->rtype, "%.*s", rtype_length, rtype);
 585   partial->line_seen = line_seen;
 586   partial->fn = fn;
 587   fn->partial = partial;
 588   partial->next = partial_proto_list;
 589   partial_proto_list = partial;
 590   if (verbose)
 591     {
 592       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 593                inc_filename, partial->fname);
 594     }
 595 }
 596
 597 /* For any name in NAMES that is defined as a macro,
 598    call recognized_macro on it.  */
 599
 600 static void
 601 check_macro_names (pfile, names)
 602      cpp_reader *pfile;
 603      namelist names;
 604 {
 605   while (*names)
 606     {
 607       if (cpp_lookup (pfile, names, -1, -1))
 608         recognized_macro (names);
 609       names += strlen (names) + 1;
 610     }
 611 }
 612
 613 static void
 614 read_scan_file (in_fname, argc, argv)
 615      char *in_fname;
 616      int argc;
 617      char **argv;
 618 {
 619   cpp_reader scan_in;
 620   cpp_options scan_options;
 621   struct fn_decl *fn;
 622   int i;
 623   register struct symbol_list *cur_symbols;
 624
 625   obstack_init (&scan_file_obstack);
 626
 627   cpp_reader_init (&scan_in);
 628   scan_in.opts = &scan_options;
 629   cpp_options_init (&scan_options);
 630   i = cpp_handle_options (&scan_in, argc, argv);
 631   if (i < argc && ! CPP_FATAL_ERRORS (&scan_in))
 632     cpp_fatal (&scan_in, "Invalid option `%s'", argv[i]);
 633   if (CPP_FATAL_ERRORS (&scan_in))
 634     exit (FATAL_EXIT_CODE);
 635
 636   if (! cpp_start_read (&scan_in, in_fname))
 637     exit (FATAL_EXIT_CODE);
 638   CPP_OPTIONS (&scan_in)->no_line_commands = 1;
 639
 640   scan_decls (&scan_in, argc, argv);
 641   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 642     check_macro_names (&scan_in, cur_symbols->names);
 643
 644   if (verbose && (scan_in.errors + warnings) > 0)
 645     fprintf (stderr, "(%s: %d errors and %d warnings from cpp)\n",
 646              inc_filename, scan_in.errors, warnings);
 647   if (scan_in.errors)
 648     exit (SUCCESS_EXIT_CODE);
 649
 650   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 651      If so, those functions are also required.  */
 652   if (special_file_handling == stdio_h
 653       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 654     {
 655       static char getchar_call[] = "getchar();";
 656       cpp_buffer *buf
 657         = cpp_push_buffer (&scan_in, getchar_call, sizeof(getchar_call) - 1);
 658       int old_written = CPP_WRITTEN (&scan_in);
 659       int seen_filbuf = 0;
 660
 661       /* Scan the macro expansion of "getchar();".  */
 662       for (;;)
 663         {
 664           enum cpp_token token = cpp_get_token (&scan_in);
 665           int length = CPP_WRITTEN (&scan_in) - old_written;
 666           CPP_SET_WRITTEN (&scan_in, old_written);
 667           if (token == CPP_EOF) /* Should not happen ...  */
 668             break;
 669           if (token == CPP_POP && CPP_BUFFER (&scan_in) == buf)
 670             {
 671               cpp_pop_buffer (&scan_in);
 672               break;
 673             }
 674           if (token == CPP_NAME && length == 7
 675               && strcmp ("_filbuf", scan_in.token_buffer + old_written) == 0)
 676             seen_filbuf++;
 677         }
 678       if (seen_filbuf)
 679         {
 680           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 681           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 682           int need_flsbuf
 683             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 684
 685           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 686           if (need_filbuf + need_flsbuf)
 687             {
 688               const char *new_list;
 689               if (need_filbuf)
 690                 SET_REQUIRED (fn);
 691               if (need_flsbuf)
 692                 SET_REQUIRED (flsbuf_fn);
 693               if (need_flsbuf + need_filbuf == 2)
 694                 new_list = "_filbuf\0_flsbuf\0";
 695               else if (need_flsbuf)
 696                 new_list = "_flsbuf\0";
 697               else /* if (need_flsbuf) */
 698                 new_list = "_filbuf\0";
 699               add_symbols (ANSI_SYMBOL, new_list);
 700               required_unseen_count += need_filbuf + need_flsbuf;
 701             }
 702         }
 703     }
 704
 705   if (required_unseen_count + partial_count + required_other
 706 #if ADD_MISSING_EXTERN_C
 707       + missing_extern_C_count
 708 #endif
 709       == 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 #if ADD_MISSING_EXTERN_C
 726       if (missing_extern_C_count)
 727         fprintf (stderr,
 728                  "%s: %d declarations not protected by extern \"C\".\n",
 729                  inc_filename, missing_extern_C_count);
 730 #endif
 731     }
 732 }
 733
 734 static void
 735 write_rbrac ()
 736 {
 737   struct fn_decl *fn;
 738   const char *cptr;
 739   register struct symbol_list *cur_symbols;
 740
 741   if (required_unseen_count)
 742     {
 743 #ifdef NO_IMPLICIT_EXTERN_C
 744       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 745 #endif
 746     }
 747
 748   /* Now we print out prototypes for those functions that we haven't seen.  */
 749   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 750     {
 751       int if_was_emitted = 0;
 752       int name_len;
 753       cptr = cur_symbols->names;
 754       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 755         {
 756           int macro_protect = 0;
 757
 758           if (cur_symbols->flags & MACRO_SYMBOL)
 759             continue;
 760
 761           fn = lookup_std_proto (cptr, name_len);
 762           if (fn == NULL || !REQUIRED (fn))
 763             continue;
 764
 765           if (!if_was_emitted)
 766             {
 767 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 768               if (cur_symbols->flags & ANSI_SYMBOL)
 769                 fprintf (outf,
 770          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 771               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 772                 fprintf (outf,
 773        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 774     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 775     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 776               else if (cur_symbols->flags & XOPEN_SYMBOL)
 777                 {
 778                 fprintf (outf,
 779        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 780    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 781                 }
 782               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 783                 {
 784                 fprintf (outf,
 785        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 786    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 787                 }
 788               else
 789                 {
 790                   fatal ("internal error for function %s", fn->fname);
 791                 }
 792               if_was_emitted = 1;
 793             }
 794
 795           /* In the case of memmove, protect in case the application
 796              defines it as a macro before including the header.  */
 797           if (!strcmp (fn->fname, "memmove")
 798               || !strcmp (fn->fname, "vprintf")
 799               || !strcmp (fn->fname, "vfprintf")
 800               || !strcmp (fn->fname, "vsprintf")
 801               || !strcmp (fn->fname, "rewinddir")
 802               || !strcmp (fn->fname, "abort"))
 803             macro_protect = 1;
 804
 805           if (macro_protect)
 806             fprintf (outf, "#ifndef %s\n", fn->fname);
 807           fprintf (outf, "extern %s %s (%s);\n",
 808                    fn->rtype, fn->fname, fn->params);
 809           if (macro_protect)
 810             fprintf (outf, "#endif\n");
 811         }
 812       if (if_was_emitted)
 813         fprintf (outf,
 814                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 815     }
 816   if (required_unseen_count)
 817     {
 818 #ifdef NO_IMPLICIT_EXTERN_C
 819       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 820 #endif
 821     }
 822
 823   switch (special_file_handling)
 824     {
 825     case errno_h:
 826       if (!seen_errno)
 827         fprintf (outf, "extern int errno;\n");
 828       break;
 829     case stdlib_h:
 830       if (!seen_EXIT_FAILURE)
 831         fprintf (outf, "#define EXIT_FAILURE 1\n");
 832       if (!seen_EXIT_SUCCESS)
 833         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 834       break;
 835     case sys_stat_h:
 836       if (!seen_S_ISBLK && seen_S_IFBLK)
 837         fprintf (outf,
 838                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 839       if (!seen_S_ISCHR && seen_S_IFCHR)
 840         fprintf (outf,
 841                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 842       if (!seen_S_ISDIR && seen_S_IFDIR)
 843         fprintf (outf,
 844                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 845       if (!seen_S_ISFIFO && seen_S_IFIFO)
 846         fprintf (outf,
 847                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 848       if (!seen_S_ISLNK && seen_S_IFLNK)
 849         fprintf (outf,
 850                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 851       if (!seen_S_ISREG && seen_S_IFREG)
 852         fprintf (outf,
 853                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 854       break;
 855
 856     default:
 857       break;
 858     }
 859
 860
 861 #if ADD_MISSING_EXTERN_C
 862   if (missing_extern_C_count + required_unseen_count > 0)
 863     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 864 #endif
 865 }
 866
 867 /* Returns 1 iff the file is properly protected from multiple inclusion:
 868    #ifndef PROTECT_NAME
 869    #define PROTECT_NAME
 870    #endif
 871
 872  */
 873
 874 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 875 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 876
 877 static int
 878 inf_skip_spaces (c)
 879      int c;
 880 {
 881   for (;;)
 882     {
 883       if (c == ' ' || c == '\t')
 884         c = INF_GET ();
 885       else if (c == '/')
 886         {
 887           c = INF_GET ();
 888           if (c != '*')
 889             {
 890               (void) INF_UNGET (c);
 891               return '/';
 892             }
 893           c = INF_GET ();
 894           for (;;)
 895             {
 896               if (c == EOF)
 897                 return EOF;
 898               else if (c != '*')
 899                 {
 900                   if (c == '\n')
 901                     source_lineno++, lineno++;
 902                   c = INF_GET ();
 903                 }
 904               else if ((c = INF_GET ()) == '/')
 905                 return INF_GET ();
 906             }
 907         }
 908       else
 909         break;
 910     }
 911   return c;
 912 }
 913
 914 /* Read into STR from inf_buffer upto DELIM.  */
 915
 916 static int
 917 inf_read_upto (str, delim)
 918      sstring *str;
 919      int delim;
 920 {
 921   int ch;
 922   for (;;)
 923     {
 924       ch = INF_GET ();
 925       if (ch == EOF || ch == delim)
 926         break;
 927       SSTRING_PUT (str, ch);
 928     }
 929   MAKE_SSTRING_SPACE (str, 1);
 930   *str->ptr = 0;
 931   return ch;
 932 }
 933
 934 static int
 935 inf_scan_ident (s, c)
 936      register sstring *s;
 937      int c;
 938 {
 939   s->ptr = s->base;
 940   if (ISALPHA (c) || c == '_')
 941     {
 942       for (;;)
 943         {
 944           SSTRING_PUT (s, c);
 945           c = INF_GET ();
 946           if (c == EOF || !(ISALNUM (c) || c == '_'))
 947             break;
 948         }
 949     }
 950   MAKE_SSTRING_SPACE (s, 1);
 951   *s->ptr = 0;
 952   return c;
 953 }
 954
 955 /* Returns 1 if the file is correctly protected against multiple
 956    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 957    and setting *endif_line to the final #endif.
 958    Otherwise return 0.  */
 959
 960 static int
 961 check_protection (ifndef_line, endif_line)
 962      int *ifndef_line, *endif_line;
 963 {
 964   int c;
 965   int if_nesting = 1; /* Level of nesting of #if's */
 966   char *protect_name = NULL; /* Identifier following initial #ifndef */
 967   int define_seen = 0;
 968
 969   /* Skip initial white space (including comments).  */
 970   for (;; lineno++)
 971     {
 972       c = inf_skip_spaces (' ');
 973       if (c == EOF)
 974         return 0;
 975       if (c != '\n')
 976         break;
 977     }
 978   if (c != '#')
 979     return 0;
 980   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 981   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 982     return 0;
 983
 984   /* So far so good: We've seen an initial #ifndef.  */
 985   *ifndef_line = lineno;
 986   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 987   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 988     return 0;
 989   protect_name = xstrdup (buf.base);
 990
 991   (void) INF_UNGET (c);
 992   c = inf_read_upto (&buf, '\n');
 993   if (c == EOF)
 994     return 0;
 995   lineno++;
 996
 997   for (;;)
 998     {
 999       c = inf_skip_spaces (' ');
1000       if (c == EOF)
1001         return 0;
1002       if (c == '\n')
1003         {
1004           lineno++;
1005           continue;
1006         }
1007       if (c != '#')
1008         goto skip_to_eol;
1009       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1010       if (SSTRING_LENGTH (&buf) == 0)
1011         ;
1012       else if (!strcmp (buf.base, "ifndef")
1013           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1014         {
1015           if_nesting++;
1016         }
1017       else if (!strcmp (buf.base, "endif"))
1018         {
1019           if_nesting--;
1020           if (if_nesting == 0)
1021             break;
1022         }
1023       else if (!strcmp (buf.base, "else"))
1024         {
1025           if (if_nesting == 1)
1026             return 0;
1027         }
1028       else if (!strcmp (buf.base, "define"))
1029         {
1030           if (if_nesting != 1)
1031             goto skip_to_eol;
1032           c = inf_skip_spaces (c);
1033           c = inf_scan_ident (&buf, c);
1034           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1035             define_seen = 1;
1036         }
1037     skip_to_eol:
1038       for (;;)
1039         {
1040           if (c == '\n' || c == EOF)
1041             break;
1042           c = INF_GET ();
1043         }
1044       if (c == EOF)
1045         return 0;
1046       lineno++;
1047     }
1048
1049   if (!define_seen)
1050      return 0;
1051   *endif_line = lineno;
1052   /* Skip final white space (including comments).  */
1053   for (;;)
1054     {
1055       c = inf_skip_spaces (' ');
1056       if (c == EOF)
1057         break;
1058       if (c != '\n')
1059         return 0;
1060     }
1061
1062   return 1;
1063 }
1064
1065 extern int main                 PROTO ((int, char **));
1066
1067 int
1068 main (argc, argv)
1069      int argc;
1070      char **argv;
1071 {
1072   int inf_fd;
1073   struct stat sbuf;
1074   int c;
1075 #ifdef FIXPROTO_IGNORE_LIST
1076   int i;
1077 #endif
1078   const char *cptr;
1079   int ifndef_line;
1080   int endif_line;
1081   long to_read;
1082   long int inf_size;
1083   register struct symbol_list *cur_symbols;
1084
1085   if (argv[0] && argv[0][0])
1086     {
1087       register char *p;
1088
1089       progname = 0;
1090       for (p = argv[0]; *p; p++)
1091         if (*p == '/')
1092           progname = p;
1093       progname = progname ? progname+1 : argv[0];
1094     }
1095
1096   if (argc < 4)
1097     {
1098       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1099                progname);
1100       exit (FATAL_EXIT_CODE);
1101     }
1102
1103   inc_filename = argv[1];
1104   inc_filename_length = strlen (inc_filename);
1105
1106 #ifdef FIXPROTO_IGNORE_LIST
1107   for (i = 0; files_to_ignore[i] != NULL; i++)
1108     {
1109       char *ignore_name = files_to_ignore[i];
1110       int ignore_len = strlen (ignore_name);
1111       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1112         {
1113           if (ignore_name[ignore_len-1] == '/'
1114               || inc_filename[ignore_len] == '\0')
1115             {
1116               if (verbose)
1117                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1118               exit (SUCCESS_EXIT_CODE);
1119             }
1120         }
1121
1122     }
1123 #endif
1124
1125   if (strcmp (inc_filename, "sys/stat.h") == 0)
1126     special_file_handling = sys_stat_h;
1127   else if (strcmp (inc_filename, "errno.h") == 0)
1128     special_file_handling = errno_h, required_other++;
1129   else if (strcmp (inc_filename, "stdlib.h") == 0)
1130     special_file_handling = stdlib_h, required_other+=2;
1131   else if (strcmp (inc_filename, "stdio.h") == 0)
1132     special_file_handling = stdio_h;
1133   include_entry = std_include_table;
1134   while (include_entry->name != NULL
1135          && ((strcmp (include_entry->name, CONTINUED) == 0)
1136              || strcmp (inc_filename, include_entry->name) != 0))
1137     include_entry++;
1138
1139   if (include_entry->name != NULL)
1140     {
1141       struct std_include_entry *entry;
1142       cur_symbol_table_size = 0;
1143       for (entry = include_entry; ;)
1144         {
1145           if (entry->flags)
1146             add_symbols (entry->flags, entry->names);
1147           entry++;
1148           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1149             break;
1150         }
1151     }
1152   else
1153     symbol_table[0].names = NULL;
1154
1155   /* Count and mark the prototypes required for this include file.  */
1156   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1157     {
1158       int name_len;
1159       if (cur_symbols->flags & MACRO_SYMBOL)
1160         continue;
1161       cptr = cur_symbols->names;
1162       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1163         {
1164           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1165           required_unseen_count++;
1166           if (fn == NULL)
1167             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1168           else
1169             SET_REQUIRED (fn);
1170         }
1171     }
1172
1173   read_scan_file (argv[2], argc - 4, argv + 4);
1174
1175   inf_fd = open (argv[2], O_RDONLY, 0666);
1176   if (inf_fd < 0)
1177     {
1178       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1179                progname, argv[2]);
1180       perror (NULL);
1181       exit (FATAL_EXIT_CODE);
1182     }
1183   if (fstat (inf_fd, &sbuf) < 0)
1184     {
1185       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1186       perror (NULL);
1187       exit (FATAL_EXIT_CODE);
1188     }
1189   inf_size = sbuf.st_size;
1190   inf_buffer = (char *) xmalloc (inf_size + 2);
1191   inf_buffer[inf_size] = '\n';
1192   inf_buffer[inf_size + 1] = '\0';
1193   inf_limit = inf_buffer + inf_size;
1194   inf_ptr = inf_buffer;
1195
1196   to_read = inf_size;
1197   while (to_read > 0)
1198     {
1199       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1200       if (i < 0)
1201         {
1202           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1203           perror (NULL);
1204           exit (FATAL_EXIT_CODE);
1205         }
1206       if (i == 0)
1207         {
1208           inf_size -= to_read;
1209           break;
1210         }
1211       to_read -= i;
1212     }
1213
1214   close (inf_fd);
1215
1216   /* If file doesn't end with '\n', add one.  */
1217   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1218     inf_limit++;
1219
1220   unlink (argv[3]);
1221   outf = fopen (argv[3], "w");
1222   if (outf == NULL)
1223     {
1224       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1225                progname, argv[3]);
1226       perror (NULL);
1227       exit (FATAL_EXIT_CODE);
1228     }
1229
1230   lineno = 1;
1231
1232   if (check_protection (&ifndef_line, &endif_line))
1233     {
1234       lbrac_line = ifndef_line+1;
1235       rbrac_line = endif_line;
1236     }
1237   else
1238     {
1239       lbrac_line = 1;
1240       rbrac_line = -1;
1241     }
1242
1243   /* Reset input file.  */
1244   inf_ptr = inf_buffer;
1245   lineno = 1;
1246
1247   for (;;)
1248     {
1249       if (lineno == lbrac_line)
1250         write_lbrac ();
1251       if (lineno == rbrac_line)
1252         write_rbrac ();
1253       for (;;)
1254         {
1255           struct fn_decl *fn;
1256           c = INF_GET ();
1257           if (c == EOF)
1258             break;
1259           if (ISALPHA (c) || c == '_')
1260             {
1261               c = inf_scan_ident (&buf, c);
1262               (void) INF_UNGET (c);
1263               fputs (buf.base, outf);
1264               fn = lookup_std_proto (buf.base, strlen (buf.base));
1265               /* We only want to edit the declaration matching the one
1266                  seen by scan-decls, as there can be multiple
1267                  declarations, selected by #ifdef __STDC__ or whatever.  */
1268               if (fn && fn->partial && fn->partial->line_seen == lineno)
1269                 {
1270                   c = inf_skip_spaces (' ');
1271                   if (c == EOF)
1272                     break;
1273                   if (c == '(')
1274                     {
1275                       c = inf_skip_spaces (' ');
1276                       if (c == ')')
1277                         {
1278                           fprintf (outf, " _PARAMS((%s))", fn->params);
1279                         }
1280                       else
1281                         {
1282                           putc ('(', outf);
1283                           (void) INF_UNGET (c);
1284                         }
1285                     }
1286                   else
1287                     fprintf (outf, " %c", c);
1288                 }
1289             }
1290           else
1291             {
1292               putc (c, outf);
1293               if (c == '\n')
1294                 break;
1295             }
1296         }
1297       if (c == EOF)
1298         break;
1299       lineno++;
1300     }
1301   if (rbrac_line < 0)
1302     write_rbrac ();
1303
1304   fclose (outf);
1305
1306   return 0;
1307 }
1308 \f
1309
1310 static void
1311 v_fatal (str, ap)
1312   const char * str;
1313   va_list ap;
1314 {
1315   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1316   vfprintf (stderr, str, ap);
1317   fprintf (stderr, "\n");
1318
1319   exit (FATAL_EXIT_CODE);
1320 }
1321
1322 static void
1323 fatal VPROTO ((const char *str, ...))
1324 {
1325 #ifndef ANSI_PROTOTYPES
1326   const char *str;
1327 #endif
1328   va_list ap;
1329
1330   VA_START(ap, str);
1331
1332 #ifndef ANSI_PROTOTYPES
1333   str = va_arg (ap, const char *);
1334 #endif
1335
1336   v_fatal(str, ap);
1337   va_end(ap);
1338 }