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, 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 are such 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);
 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   for (i = 0; i < argc; i += strings_processed)
 636     {
 637       if (argv[i][0] == 'I')
 638         {
 639           if (argv[i][1] != '\0')
 640             strings_processed = 1, add_path (argv[i] + 1, BRACKET, false);
 641           else if (i + 1 == argc)
 642             strings_processed = 0;
 643           else
 644             strings_processed = 2, add_path (argv[i + 1], BRACKET, false);
 645         }
 646       else
 647         strings_processed = cpp_handle_option (scan_in, argc - i, argv + i);
 648
 649       if (strings_processed == 0)
 650         break;
 651     }
 652
 653   if (i < argc)
 654     cpp_error (scan_in, DL_ERROR, "invalid option `%s'", argv[i]);
 655   if (cpp_errors (scan_in))
 656     exit (FATAL_EXIT_CODE);
 657
 658   register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
 659                            true /* stdinc */, false /* cxx_stdinc */,
 660                            false /* verbose */);
 661   if (! cpp_read_main_file (scan_in, in_fname, NULL))
 662     exit (FATAL_EXIT_CODE);
 663
 664   cpp_finish_options (scan_in);
 665
 666   /* We are scanning a system header, so mark it as such.  */
 667   cpp_make_system_header (scan_in, 1, 0);
 668
 669   scan_decls (scan_in, argc, argv);
 670   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 671     check_macro_names (scan_in, cur_symbols->names);
 672
 673   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 674      If so, those functions are also required.  */
 675   if (special_file_handling == stdio_h
 676       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 677     {
 678       static const unsigned char getchar_call[] = "getchar();";
 679       int seen_filbuf = 0;
 680
 681       /* Scan the macro expansion of "getchar();".  */
 682       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 683                        /* from_stage3 */ true, 1);
 684       for (;;)
 685         {
 686           const cpp_token *t = cpp_get_token (scan_in);
 687
 688           if (t->type == CPP_EOF)
 689             break;
 690           else if (cpp_ideq (t, "_filbuf"))
 691             seen_filbuf++;
 692         }
 693
 694       if (seen_filbuf)
 695         {
 696           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 697           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 698           int need_flsbuf
 699             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 700
 701           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 702           if (need_filbuf + need_flsbuf)
 703             {
 704               const char *new_list;
 705               if (need_filbuf)
 706                 SET_REQUIRED (fn);
 707               if (need_flsbuf)
 708                 SET_REQUIRED (flsbuf_fn);
 709               if (need_flsbuf && need_filbuf)
 710                 new_list = "_filbuf\0_flsbuf\0";
 711               else if (need_flsbuf)
 712                 new_list = "_flsbuf\0";
 713               else /* if (need_flsbuf) */
 714                 new_list = "_filbuf\0";
 715               add_symbols (ANSI_SYMBOL, new_list);
 716               required_unseen_count += need_filbuf + need_flsbuf;
 717             }
 718         }
 719     }
 720
 721   if (required_unseen_count + partial_count + required_other
 722 #if ADD_MISSING_EXTERN_C
 723       + missing_extern_C_count
 724 #endif
 725       == 0)
 726     {
 727       if (verbose)
 728         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 729       exit (SUCCESS_EXIT_CODE);
 730     }
 731   if (!verbose)
 732     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 733   else
 734     {
 735       if (required_unseen_count)
 736         fprintf (stderr, "%s: %d missing function declarations.\n",
 737                  inc_filename, required_unseen_count);
 738       if (partial_count)
 739         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 740                  inc_filename, partial_count);
 741 #if ADD_MISSING_EXTERN_C
 742       if (missing_extern_C_count)
 743         fprintf (stderr,
 744                  "%s: %d declarations not protected by extern \"C\".\n",
 745                  inc_filename, missing_extern_C_count);
 746 #endif
 747     }
 748 }
 749
 750 static void
 751 write_rbrac ()
 752 {
 753   struct fn_decl *fn;
 754   const char *cptr;
 755   struct symbol_list *cur_symbols;
 756
 757   if (required_unseen_count)
 758     {
 759 #ifdef NO_IMPLICIT_EXTERN_C
 760       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 761 #endif
 762     }
 763
 764   /* Now we print out prototypes for those functions that we haven't seen.  */
 765   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 766     {
 767       int if_was_emitted = 0;
 768       int name_len;
 769       cptr = cur_symbols->names;
 770       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 771         {
 772           int macro_protect = 0;
 773
 774           if (cur_symbols->flags & MACRO_SYMBOL)
 775             continue;
 776
 777           fn = lookup_std_proto (cptr, name_len);
 778           if (fn == NULL || !REQUIRED (fn))
 779             continue;
 780
 781           if (!if_was_emitted)
 782             {
 783 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 784               if (cur_symbols->flags & ANSI_SYMBOL)
 785                 fprintf (outf,
 786          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 787               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 788                 fprintf (outf,
 789        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 790     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 791     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 792               else if (cur_symbols->flags & XOPEN_SYMBOL)
 793                 {
 794                 fprintf (outf,
 795        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 796    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 797                 }
 798               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 799                 {
 800                 fprintf (outf,
 801        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 802    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 803                 }
 804               else
 805                 {
 806                   fatal ("internal error for function %s", fn->fname);
 807                 }
 808               if_was_emitted = 1;
 809             }
 810
 811           /* In the case of memmove, protect in case the application
 812              defines it as a macro before including the header.  */
 813           if (!strcmp (fn->fname, "memmove")
 814               || !strcmp (fn->fname, "putc")
 815               || !strcmp (fn->fname, "getc")
 816               || !strcmp (fn->fname, "vprintf")
 817               || !strcmp (fn->fname, "vfprintf")
 818               || !strcmp (fn->fname, "vsprintf")
 819               || !strcmp (fn->fname, "rewinddir")
 820               || !strcmp (fn->fname, "abort"))
 821             macro_protect = 1;
 822
 823           if (macro_protect)
 824             fprintf (outf, "#ifndef %s\n", fn->fname);
 825           fprintf (outf, "extern %s %s (%s);\n",
 826                    fn->rtype, fn->fname, fn->params);
 827           if (macro_protect)
 828             fprintf (outf, "#endif\n");
 829         }
 830       if (if_was_emitted)
 831         fprintf (outf,
 832                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 833     }
 834   if (required_unseen_count)
 835     {
 836 #ifdef NO_IMPLICIT_EXTERN_C
 837       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 838 #endif
 839     }
 840
 841   switch (special_file_handling)
 842     {
 843     case errno_h:
 844       if (!seen_errno)
 845         fprintf (outf, "extern int errno;\n");
 846       break;
 847     case stdlib_h:
 848       if (!seen_EXIT_FAILURE)
 849         fprintf (outf, "#define EXIT_FAILURE 1\n");
 850       if (!seen_EXIT_SUCCESS)
 851         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 852       break;
 853     case sys_stat_h:
 854       if (!seen_S_ISBLK && seen_S_IFBLK)
 855         fprintf (outf,
 856                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 857       if (!seen_S_ISCHR && seen_S_IFCHR)
 858         fprintf (outf,
 859                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 860       if (!seen_S_ISDIR && seen_S_IFDIR)
 861         fprintf (outf,
 862                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 863       if (!seen_S_ISFIFO && seen_S_IFIFO)
 864         fprintf (outf,
 865                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 866       if (!seen_S_ISLNK && seen_S_IFLNK)
 867         fprintf (outf,
 868                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 869       if (!seen_S_ISREG && seen_S_IFREG)
 870         fprintf (outf,
 871                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 872       break;
 873
 874     default:
 875       break;
 876     }
 877
 878
 879 #if ADD_MISSING_EXTERN_C
 880   if (missing_extern_C_count + required_unseen_count > 0)
 881     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 882 #endif
 883 }
 884
 885 /* Returns 1 iff the file is properly protected from multiple inclusion:
 886    #ifndef PROTECT_NAME
 887    #define PROTECT_NAME
 888    #endif
 889
 890  */
 891
 892 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 893 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 894
 895 static int
 896 inf_skip_spaces (c)
 897      int c;
 898 {
 899   for (;;)
 900     {
 901       if (c == ' ' || c == '\t')
 902         c = INF_GET ();
 903       else if (c == '/')
 904         {
 905           c = INF_GET ();
 906           if (c != '*')
 907             {
 908               (void) INF_UNGET (c);
 909               return '/';
 910             }
 911           c = INF_GET ();
 912           for (;;)
 913             {
 914               if (c == EOF)
 915                 return EOF;
 916               else if (c != '*')
 917                 {
 918                   if (c == '\n')
 919                     source_lineno++, lineno++;
 920                   c = INF_GET ();
 921                 }
 922               else if ((c = INF_GET ()) == '/')
 923                 return INF_GET ();
 924             }
 925         }
 926       else
 927         break;
 928     }
 929   return c;
 930 }
 931
 932 /* Read into STR from inf_buffer upto DELIM.  */
 933
 934 static int
 935 inf_read_upto (str, delim)
 936      sstring *str;
 937      int delim;
 938 {
 939   int ch;
 940   for (;;)
 941     {
 942       ch = INF_GET ();
 943       if (ch == EOF || ch == delim)
 944         break;
 945       SSTRING_PUT (str, ch);
 946     }
 947   MAKE_SSTRING_SPACE (str, 1);
 948   *str->ptr = 0;
 949   return ch;
 950 }
 951
 952 static int
 953 inf_scan_ident (s, c)
 954      sstring *s;
 955      int c;
 956 {
 957   s->ptr = s->base;
 958   if (ISIDST (c))
 959     {
 960       for (;;)
 961         {
 962           SSTRING_PUT (s, c);
 963           c = INF_GET ();
 964           if (c == EOF || !(ISIDNUM (c)))
 965             break;
 966         }
 967     }
 968   MAKE_SSTRING_SPACE (s, 1);
 969   *s->ptr = 0;
 970   return c;
 971 }
 972
 973 /* Returns 1 if the file is correctly protected against multiple
 974    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 975    and setting *endif_line to the final #endif.
 976    Otherwise return 0.  */
 977
 978 static int
 979 check_protection (ifndef_line, endif_line)
 980      int *ifndef_line, *endif_line;
 981 {
 982   int c;
 983   int if_nesting = 1; /* Level of nesting of #if's */
 984   char *protect_name = NULL; /* Identifier following initial #ifndef */
 985   int define_seen = 0;
 986
 987   /* Skip initial white space (including comments).  */
 988   for (;; lineno++)
 989     {
 990       c = inf_skip_spaces (' ');
 991       if (c == EOF)
 992         return 0;
 993       if (c != '\n')
 994         break;
 995     }
 996   if (c != '#')
 997     return 0;
 998   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 999   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
1000     return 0;
1001
1002   /* So far so good: We've seen an initial #ifndef.  */
1003   *ifndef_line = lineno;
1004   c = inf_scan_ident (&buf, inf_skip_spaces (c));
1005   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
1006     return 0;
1007   protect_name = xstrdup (buf.base);
1008
1009   (void) INF_UNGET (c);
1010   c = inf_read_upto (&buf, '\n');
1011   if (c == EOF)
1012     return 0;
1013   lineno++;
1014
1015   for (;;)
1016     {
1017       c = inf_skip_spaces (' ');
1018       if (c == EOF)
1019         return 0;
1020       if (c == '\n')
1021         {
1022           lineno++;
1023           continue;
1024         }
1025       if (c != '#')
1026         goto skip_to_eol;
1027       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1028       if (SSTRING_LENGTH (&buf) == 0)
1029         ;
1030       else if (!strcmp (buf.base, "ifndef")
1031           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1032         {
1033           if_nesting++;
1034         }
1035       else if (!strcmp (buf.base, "endif"))
1036         {
1037           if_nesting--;
1038           if (if_nesting == 0)
1039             break;
1040         }
1041       else if (!strcmp (buf.base, "else"))
1042         {
1043           if (if_nesting == 1)
1044             return 0;
1045         }
1046       else if (!strcmp (buf.base, "define"))
1047         {
1048           c = inf_skip_spaces (c);
1049           c = inf_scan_ident (&buf, c);
1050           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1051             define_seen = 1;
1052         }
1053     skip_to_eol:
1054       for (;;)
1055         {
1056           if (c == '\n' || c == EOF)
1057             break;
1058           c = INF_GET ();
1059         }
1060       if (c == EOF)
1061         return 0;
1062       lineno++;
1063     }
1064
1065   if (!define_seen)
1066      return 0;
1067   *endif_line = lineno;
1068   /* Skip final white space (including comments).  */
1069   for (;;)
1070     {
1071       c = inf_skip_spaces (' ');
1072       if (c == EOF)
1073         break;
1074       if (c != '\n')
1075         return 0;
1076     }
1077
1078   return 1;
1079 }
1080
1081 extern int main                 PARAMS ((int, char **));
1082
1083 int
1084 main (argc, argv)
1085      int argc;
1086      char **argv;
1087 {
1088   int inf_fd;
1089   struct stat sbuf;
1090   int c;
1091 #ifdef FIXPROTO_IGNORE_LIST
1092   int i;
1093 #endif
1094   const char *cptr;
1095   int ifndef_line;
1096   int endif_line;
1097   long to_read;
1098   long int inf_size;
1099   struct symbol_list *cur_symbols;
1100
1101   if (argv[0] && argv[0][0])
1102     {
1103       char *p;
1104
1105       progname = 0;
1106       for (p = argv[0]; *p; p++)
1107         if (*p == '/')
1108           progname = p;
1109       progname = progname ? progname+1 : argv[0];
1110     }
1111
1112   if (argc < 4)
1113     {
1114       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1115                progname);
1116       exit (FATAL_EXIT_CODE);
1117     }
1118
1119   inc_filename = argv[1];
1120   inc_filename_length = strlen (inc_filename);
1121
1122 #ifdef FIXPROTO_IGNORE_LIST
1123   for (i = 0; files_to_ignore[i] != NULL; i++)
1124     {
1125       const char *const ignore_name = files_to_ignore[i];
1126       int ignore_len = strlen (ignore_name);
1127       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1128         {
1129           if (ignore_name[ignore_len-1] == '/'
1130               || inc_filename[ignore_len] == '\0')
1131             {
1132               if (verbose)
1133                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1134               exit (SUCCESS_EXIT_CODE);
1135             }
1136         }
1137
1138     }
1139 #endif
1140
1141   if (strcmp (inc_filename, "sys/stat.h") == 0)
1142     special_file_handling = sys_stat_h;
1143   else if (strcmp (inc_filename, "errno.h") == 0)
1144     special_file_handling = errno_h, required_other++;
1145   else if (strcmp (inc_filename, "stdlib.h") == 0)
1146     special_file_handling = stdlib_h, required_other+=2;
1147   else if (strcmp (inc_filename, "stdio.h") == 0)
1148     special_file_handling = stdio_h;
1149   include_entry = std_include_table;
1150   while (include_entry->name != NULL
1151          && ((strcmp (include_entry->name, CONTINUED) == 0)
1152              || strcmp (inc_filename, include_entry->name) != 0))
1153     include_entry++;
1154
1155   if (include_entry->name != NULL)
1156     {
1157       const struct std_include_entry *entry;
1158       cur_symbol_table_size = 0;
1159       for (entry = include_entry; ;)
1160         {
1161           if (entry->flags)
1162             add_symbols (entry->flags, entry->names);
1163           entry++;
1164           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1165             break;
1166         }
1167     }
1168   else
1169     symbol_table[0].names = NULL;
1170
1171   /* Count and mark the prototypes required for this include file.  */
1172   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1173     {
1174       int name_len;
1175       if (cur_symbols->flags & MACRO_SYMBOL)
1176         continue;
1177       cptr = cur_symbols->names;
1178       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1179         {
1180           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1181           required_unseen_count++;
1182           if (fn == NULL)
1183             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1184           else
1185             SET_REQUIRED (fn);
1186         }
1187     }
1188
1189   read_scan_file (argv[2], argc - 4, argv + 4);
1190
1191   inf_fd = open (argv[2], O_RDONLY, 0666);
1192   if (inf_fd < 0)
1193     {
1194       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1195                progname, argv[2]);
1196       perror (NULL);
1197       exit (FATAL_EXIT_CODE);
1198     }
1199   if (fstat (inf_fd, &sbuf) < 0)
1200     {
1201       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1202       perror (NULL);
1203       exit (FATAL_EXIT_CODE);
1204     }
1205   inf_size = sbuf.st_size;
1206   inf_buffer = (char *) xmalloc (inf_size + 2);
1207   inf_ptr = inf_buffer;
1208
1209   to_read = inf_size;
1210   while (to_read > 0)
1211     {
1212       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1213       if (i < 0)
1214         {
1215           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1216           perror (NULL);
1217           exit (FATAL_EXIT_CODE);
1218         }
1219       if (i == 0)
1220         {
1221           inf_size -= to_read;
1222           break;
1223         }
1224       to_read -= i;
1225     }
1226
1227   close (inf_fd);
1228
1229   /* Inf_size may have changed if read was short (as on VMS) */
1230   inf_buffer[inf_size] = '\n';
1231   inf_buffer[inf_size + 1] = '\0';
1232   inf_limit = inf_buffer + inf_size;
1233
1234   /* If file doesn't end with '\n', add one.  */
1235   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1236     inf_limit++;
1237
1238   unlink (argv[3]);
1239   outf = fopen (argv[3], "w");
1240   if (outf == NULL)
1241     {
1242       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1243                progname, argv[3]);
1244       perror (NULL);
1245       exit (FATAL_EXIT_CODE);
1246     }
1247
1248   lineno = 1;
1249
1250   if (check_protection (&ifndef_line, &endif_line))
1251     {
1252       lbrac_line = ifndef_line+1;
1253       rbrac_line = endif_line;
1254     }
1255   else
1256     {
1257       lbrac_line = 1;
1258       rbrac_line = -1;
1259     }
1260
1261   /* Reset input file.  */
1262   inf_ptr = inf_buffer;
1263   lineno = 1;
1264
1265   for (;;)
1266     {
1267       if (lineno == lbrac_line)
1268         write_lbrac ();
1269       if (lineno == rbrac_line)
1270         write_rbrac ();
1271       for (;;)
1272         {
1273           struct fn_decl *fn;
1274           c = INF_GET ();
1275           if (c == EOF)
1276             break;
1277           if (ISIDST (c))
1278             {
1279               c = inf_scan_ident (&buf, c);
1280               (void) INF_UNGET (c);
1281               fputs (buf.base, outf);
1282               fn = lookup_std_proto (buf.base, strlen (buf.base));
1283               /* We only want to edit the declaration matching the one
1284                  seen by scan-decls, as there can be multiple
1285                  declarations, selected by #ifdef __STDC__ or whatever.  */
1286               if (fn && fn->partial && fn->partial->line_seen == lineno)
1287                 {
1288                   c = inf_skip_spaces (' ');
1289                   if (c == EOF)
1290                     break;
1291                   if (c == '(')
1292                     {
1293                       c = inf_skip_spaces (' ');
1294                       if (c == ')')
1295                         {
1296                           fprintf (outf, " _PARAMS((%s))", fn->params);
1297                         }
1298                       else
1299                         {
1300                           putc ('(', outf);
1301                           (void) INF_UNGET (c);
1302                         }
1303                     }
1304                   else
1305                     fprintf (outf, " %c", c);
1306                 }
1307             }
1308           else
1309             {
1310               putc (c, outf);
1311               if (c == '\n')
1312                 break;
1313             }
1314         }
1315       if (c == EOF)
1316         break;
1317       lineno++;
1318     }
1319   if (rbrac_line < 0)
1320     write_rbrac ();
1321
1322   fclose (outf);
1323
1324   return 0;
1325 }
1326 \f
1327
1328 static void
1329 v_fatal (str, ap)
1330   const char * str;
1331   va_list ap;
1332 {
1333   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1334   vfprintf (stderr, str, ap);
1335   fprintf (stderr, "\n");
1336
1337   exit (FATAL_EXIT_CODE);
1338 }
1339
1340 static void
1341 fatal VPARAMS ((const char *str, ...))
1342 {
1343   VA_OPEN (ap, str);
1344   VA_FIXEDARG (ap, const char *, str);
1345
1346   v_fatal (str, ap);
1347   VA_CLOSE (ap);
1348 }