gcc/fix-header.c

   1 /* fix-header.c - Make C header file suitable for C++.
   2    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000 Free Software Foundation, Inc.
   4
   5 This program is free software; you can redistribute it and/or modify it
   6 under the terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option) any
   8 later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 /* This program massages a system include file (such as stdio.h),
  20    into a form that is compatible with GNU C and GNU C++.
  21
  22    * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
  23    if they seem to be needed.  These prevent C++ compilers from name
  24    mangling the functions inside the braces.
  25
  26    * If an old-style incomplete function declaration is seen (without
  27    an argument list), and it is a "standard" function listed in
  28    the file sys-protos.h (and with a non-empty argument list), then
  29    the declaration is converted to a complete prototype by replacing
  30    the empty parameter list with the argument list from sys-protos.h.
  31
  32    * The program can be given a list of (names of) required standard
  33    functions (such as fclose for stdio.h).  If a required function
  34    is not seen in the input, then a prototype for it will be
  35    written to the output.
  36
  37    * If all of the non-comment code of the original file is protected
  38    against multiple inclusion:
  39         #ifndef FOO
  40         #define FOO
  41         <body of include file>
  42         #endif
  43    then extra matter added to the include file is placed inside the <body>.
  44
  45    * If the input file is OK (nothing needs to be done);
  46    the output file is not written (nor removed if it exists).
  47
  48    There are also some special actions that are done for certain
  49    well-known standard include files:
  50
  51    * If argv[1] is "sys/stat.h", the Posix.1 macros
  52    S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
  53    they were missing, and the corresponding "traditional" S_IFxxx
  54    macros were defined.
  55
  56    * If argv[1] is "errno.h", errno is declared if it was missing.
  57
  58    * TODO:  The input file should be read complete into memory, because:
  59    a) it needs to be scanned twice anyway, and
  60    b) it would be nice to allow update in place.
  61
  62    Usage:
  63         fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
  64    where:
  65    * FOO.H is the relative file name of the include file,
  66    as it would be #include'd by a C file.  (E.g. stdio.h)
  67    * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
  68    * OUTFILE.H is the full pathname for where to write the output file,
  69    if anything needs to be done.  (e.g. ./include/stdio.h)
  70    * OPTIONS are such as you would pass to cpp.
  71
  72    Written by Per Bothner <bothner@cygnus.com>, July 1993.  */
  73
  74 #include "hconfig.h"
  75 #include "system.h"
  76 #include "obstack.h"
  77 #include "scan.h"
  78 #include "cpplib.h"
  79
  80 static void v_fatal PARAMS ((const char *, va_list)) ATTRIBUTE_NORETURN;
  81 static void fatal PARAMS ((const char *, ...)) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  82
  83 sstring buf;
  84
  85 int verbose = 0;
  86 int partial_count = 0;
  87 int warnings = 0;
  88
  89 /* We no longer need to add extern "C", because cpp implicitly
  90    forces the standard include files to be treated as C.  */
  91 /*#define ADD_MISSING_EXTERN_C 1 */
  92
  93 #if ADD_MISSING_EXTERN_C
  94 int missing_extern_C_count = 0;
  95 #endif
  96
  97 #include "xsys-protos.h"
  98
  99 #ifdef FIXPROTO_IGNORE_LIST
 100 /* This is a currently unused feature.  */
 101
 102 /* List of files and directories to ignore.
 103    A directory name (ending in '/') means ignore anything in that
 104    directory.  (It might be more efficient to do directory pruning
 105    earlier in fixproto, but this is simpler and easier to customize.) */
 106
 107 static char *files_to_ignore[] = {
 108   "X11/",
 109   FIXPROTO_IGNORE_LIST
 110   0
 111 };
 112 #endif
 113
 114 char *inf_buffer;
 115 char *inf_limit;
 116 char *inf_ptr;
 117
 118 /* Certain standard files get extra treatment */
 119
 120 enum special_file
 121 {
 122   no_special,
 123 #ifdef errno_h
 124 #undef errno_h
 125 #endif
 126   errno_h,
 127 #ifdef stdio_h
 128 #undef stdio_h
 129 #endif
 130   stdio_h,
 131 #ifdef stdlib_h
 132 #undef stdlib_h
 133 #endif
 134   stdlib_h,
 135 #ifdef sys_stat_h
 136 #undef sys_stat_h
 137 #endif
 138   sys_stat_h
 139 };
 140
 141 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 142    by an empty name (i.e. by "\0\0").  */
 143
 144 typedef const char *namelist;
 145
 146 /* The following macros provide the bits for symbol_flags.  */
 147 typedef int symbol_flags;
 148
 149 /* Used to mark names defined in the ANSI/ISO C standard.  */
 150 #define ANSI_SYMBOL 1
 151
 152 /* We no longer massage include files for POSIX or XOPEN symbols,
 153    as there are now several versions of the POSIX and XOPEN standards,
 154    and it would be a maintenance nightmare for us to track them all.
 155    Better to be compatible with the system include files.  */
 156 /*#define ADD_MISSING_POSIX 1 */
 157 /*#define ADD_MISSING_XOPEN 1 */
 158
 159 #if ADD_MISSING_POSIX
 160 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 161 #define POSIX1_SYMBOL 2
 162 #define POSIX2_SYMBOL 4
 163 #else
 164 #define POSIX1_SYMBOL 0
 165 #define POSIX2_SYMBOL 0
 166 #endif
 167
 168 #if ADD_MISSING_XOPEN
 169 /* Used to mark names defined in X/Open Portability Guide.  */
 170 #define XOPEN_SYMBOL 8
 171 /* Used to mark names defined in X/Open UNIX Extensions.  */
 172 #define XOPEN_EXTENDED_SYMBOL 16
 173 #else
 174 #define XOPEN_SYMBOL 0
 175 #define XOPEN_EXTENDED_SYMBOL 0
 176 #endif
 177
 178 /* Used to indicate names that are not functions */
 179 #define MACRO_SYMBOL 512
 180
 181 struct symbol_list {
 182   symbol_flags flags;
 183   namelist names;
 184 };
 185
 186 #define SYMBOL_TABLE_SIZE 10
 187 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 188 int cur_symbol_table_size;
 189
 190 static void add_symbols PARAMS ((symbol_flags, namelist));
 191 static struct fn_decl *lookup_std_proto PARAMS ((const char *, int));
 192 static void write_lbrac PARAMS ((void));
 193 static void recognized_macro PARAMS ((const char *));
 194 static void check_macro_names PARAMS ((cpp_reader *, namelist));
 195 static void read_scan_file PARAMS ((char *, int, char **));
 196 static void write_rbrac PARAMS ((void));
 197 static int inf_skip_spaces PARAMS ((int));
 198 static int inf_read_upto PARAMS ((sstring *, int));
 199 static int inf_scan_ident PARAMS ((sstring *, int));
 200 static int check_protection PARAMS ((int *, int *));
 201
 202 static void
 203 add_symbols (flags, names)
 204      symbol_flags flags;
 205      namelist names;
 206 {
 207   symbol_table[cur_symbol_table_size].flags = flags;
 208   symbol_table[cur_symbol_table_size].names = names;
 209   cur_symbol_table_size++;
 210   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 211     fatal ("too many calls to add_symbols");
 212   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 213 }
 214
 215 struct std_include_entry {
 216   const char *name;
 217   symbol_flags flags;
 218   namelist names;
 219 };
 220
 221 const char NONE[] = "";  /* The empty namelist.  */
 222
 223 /* Special name to indicate a continuation line in std_include_table.  */
 224 const char CONTINUED[] = "";
 225
 226 struct std_include_entry *include_entry;
 227
 228 struct std_include_entry std_include_table [] = {
 229   { "ctype.h", ANSI_SYMBOL,
 230       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 231 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 232
 233   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 234
 235   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 236
 237   /* ANSI_SYMBOL is wrong, but ...  */
 238   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 239 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 240 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 241 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 242 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 243
 244   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 245
 246   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 247   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 248
 249 /*{ "limit.h", ... provided by gcc }, */
 250
 251   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 252
 253   { "math.h", ANSI_SYMBOL,
 254       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 255 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 256 tan\0tanh\0" },
 257
 258   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 259
 260   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 261
 262   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 263   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 264
 265   /* Left out signal() - its prototype is too complex for us!
 266      Also left out "sigaction sigaddset sigdelset sigemptyset
 267      sigfillset sigismember sigpending sigprocmask sigsuspend"
 268      because these need sigset_t or struct sigaction.
 269      Most systems that provide them will also declare them.  */
 270   { "signal.h", ANSI_SYMBOL, "kill\0raise\0" },
 271
 272   { "stdio.h", ANSI_SYMBOL,
 273       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 274 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 275 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 276 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 277 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 278 tmpnam\0ungetc\0" },
 279   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 280   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 281 /* Should perhaps also handle NULL, EOF, ... ? */
 282
 283   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 284      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 285      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 286      Should perhaps also add NULL */
 287   { "stdlib.h", ANSI_SYMBOL,
 288       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 289 exit\0free\0getenv\0labs\0malloc\0putenv\0qsort\0rand\0realloc\0\
 290 srand\0strtod\0strtol\0strtoul\0system\0" },
 291   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 292
 293   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 294 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 295 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 296 strtok\0strxfrm\0" },
 297 /* Should perhaps also add NULL and size_t */
 298
 299   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 300       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 301
 302   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 303
 304   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 305      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 306      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 307   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 308
 309   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 310
 311   { "sys/stat.h", POSIX1_SYMBOL,
 312       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 313   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 314       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 315 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 316   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 317
 318 #if 0
 319 /* How do we handle fd_set? */
 320   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 321   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 322 #endif
 323
 324   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 325   /* "sys/types.h" add types (not in old g++-include) */
 326
 327   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 328
 329   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 330   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 331       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 332 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 333
 334   { "tar.h", POSIX1_SYMBOL, NONE },
 335
 336   { "termios.h", POSIX1_SYMBOL,
 337       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 338
 339   { "time.h", ANSI_SYMBOL,
 340       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0tzset\0" },
 341
 342   { "unistd.h", POSIX1_SYMBOL,
 343       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 344 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 345 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 346 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 347 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 348 ttyname\0unlink\0write\0" },
 349   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 350   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 351       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 352
 353   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 354
 355   { NULL, 0, NONE }
 356 };
 357
 358 enum special_file special_file_handling = no_special;
 359
 360 /* They are set if the corresponding macro has been seen.  */
 361 /* The following are only used when handling sys/stat.h */
 362 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 363 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 364 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 365 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 366 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 367 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 368 /* The following are only used when handling errno.h */
 369 int seen_errno = 0;
 370 /* The following are only used when handling stdlib.h */
 371 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 372 \f
 373 #define obstack_chunk_alloc xmalloc
 374 #define obstack_chunk_free free
 375 struct obstack scan_file_obstack;
 376
 377 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 378
 379 static struct fn_decl *
 380 lookup_std_proto (name, name_length)
 381      const char *name;
 382      int name_length;
 383 {
 384   int i = hashstr (name, name_length) % HASH_SIZE;
 385   int i0 = i;
 386   for (;;)
 387     {
 388       struct fn_decl *fn;
 389       if (hash_tab[i] == 0)
 390         return NULL;
 391       fn = &std_protos[hash_tab[i]];
 392       if ((int) strlen (fn->fname) == name_length
 393           && strncmp (fn->fname, name, name_length) == 0)
 394         return fn;
 395       i = (i+1) % HASH_SIZE;
 396       if (i == i0)
 397         abort ();
 398     }
 399 }
 400
 401 char *inc_filename;
 402 int inc_filename_length;
 403 const char *progname = "fix-header";
 404 FILE *outf;
 405 sstring line;
 406
 407 int lbrac_line, rbrac_line;
 408
 409 int required_unseen_count = 0;
 410 int required_other = 0;
 411
 412 static void
 413 write_lbrac ()
 414 {
 415
 416 #if ADD_MISSING_EXTERN_C
 417   if (missing_extern_C_count + required_unseen_count > 0)
 418     fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 419 #endif
 420
 421   if (partial_count)
 422     {
 423       fprintf (outf, "#ifndef _PARAMS\n");
 424       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 425       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 426       fprintf (outf, "#else\n");
 427       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 428       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 429     }
 430 }
 431
 432 struct partial_proto
 433 {
 434   struct partial_proto *next;
 435   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      const char *name;
 502      const 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      const char *fname;
 530      int fname_length;
 531      int kind; /* One of 'f' 'F' or 'I' */
 532      const char *rtype;
 533      int rtype_length;
 534      int have_arg_list;
 535      const 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')
 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_defined (pfile, names, -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   /* We are going to be scanning a header file out of its proper context,
 631      so ignore warnings and errors.  */
 632   scan_options.inhibit_warnings = 1;
 633   scan_options.inhibit_errors = 1;
 634   scan_options.no_line_commands = 1;
 635   i = cpp_handle_options (&scan_in, argc, argv);
 636   if (i < argc && ! CPP_FATAL_ERRORS (&scan_in))
 637     cpp_fatal (&scan_in, "Invalid option `%s'", argv[i]);
 638   if (CPP_FATAL_ERRORS (&scan_in))
 639     exit (FATAL_EXIT_CODE);
 640
 641   if (! cpp_start_read (&scan_in, in_fname))
 642     exit (FATAL_EXIT_CODE);
 643
 644   scan_decls (&scan_in, argc, argv);
 645   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 646     check_macro_names (&scan_in, cur_symbols->names);
 647
 648   if (verbose && (scan_in.errors + warnings) > 0)
 649     fprintf (stderr, "(%s: %d errors and %d warnings from cpp)\n",
 650              inc_filename, scan_in.errors, warnings);
 651   if (scan_in.errors)
 652     exit (SUCCESS_EXIT_CODE);
 653
 654   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 655      If so, those functions are also required.  */
 656   if (special_file_handling == stdio_h
 657       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 658     {
 659       static char getchar_call[] = "getchar();";
 660       cpp_buffer *buf
 661         = cpp_push_buffer (&scan_in, getchar_call, sizeof(getchar_call) - 1);
 662       int old_written = CPP_WRITTEN (&scan_in);
 663       int seen_filbuf = 0;
 664
 665       /* Scan the macro expansion of "getchar();".  */
 666       for (;;)
 667         {
 668           enum cpp_token token = cpp_get_token (&scan_in);
 669           int length = CPP_WRITTEN (&scan_in) - old_written;
 670           CPP_SET_WRITTEN (&scan_in, old_written);
 671           if (token == CPP_EOF) /* Should not happen ...  */
 672             break;
 673           if (token == CPP_POP && CPP_BUFFER (&scan_in) == buf)
 674             {
 675               cpp_pop_buffer (&scan_in);
 676               break;
 677             }
 678           if (token == CPP_NAME && length == 7
 679               && strcmp ("_filbuf", scan_in.token_buffer + old_written) == 0)
 680             seen_filbuf++;
 681         }
 682       if (seen_filbuf)
 683         {
 684           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 685           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 686           int need_flsbuf
 687             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 688
 689           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 690           if (need_filbuf + need_flsbuf)
 691             {
 692               const char *new_list;
 693               if (need_filbuf)
 694                 SET_REQUIRED (fn);
 695               if (need_flsbuf)
 696                 SET_REQUIRED (flsbuf_fn);
 697               if (need_flsbuf + need_filbuf == 2)
 698                 new_list = "_filbuf\0_flsbuf\0";
 699               else if (need_flsbuf)
 700                 new_list = "_flsbuf\0";
 701               else /* if (need_flsbuf) */
 702                 new_list = "_filbuf\0";
 703               add_symbols (ANSI_SYMBOL, new_list);
 704               required_unseen_count += need_filbuf + need_flsbuf;
 705             }
 706         }
 707     }
 708
 709   if (required_unseen_count + partial_count + required_other
 710 #if ADD_MISSING_EXTERN_C
 711       + missing_extern_C_count
 712 #endif
 713       == 0)
 714     {
 715       if (verbose)
 716         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 717       exit (SUCCESS_EXIT_CODE);
 718     }
 719   if (!verbose)
 720     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 721   else
 722     {
 723       if (required_unseen_count)
 724         fprintf (stderr, "%s: %d missing function declarations.\n",
 725                  inc_filename, required_unseen_count);
 726       if (partial_count)
 727         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 728                  inc_filename, partial_count);
 729 #if ADD_MISSING_EXTERN_C
 730       if (missing_extern_C_count)
 731         fprintf (stderr,
 732                  "%s: %d declarations not protected by extern \"C\".\n",
 733                  inc_filename, missing_extern_C_count);
 734 #endif
 735     }
 736 }
 737
 738 static void
 739 write_rbrac ()
 740 {
 741   struct fn_decl *fn;
 742   const char *cptr;
 743   register struct symbol_list *cur_symbols;
 744
 745   if (required_unseen_count)
 746     {
 747 #ifdef NO_IMPLICIT_EXTERN_C
 748       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 749 #endif
 750     }
 751
 752   /* Now we print out prototypes for those functions that we haven't seen.  */
 753   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 754     {
 755       int if_was_emitted = 0;
 756       int name_len;
 757       cptr = cur_symbols->names;
 758       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 759         {
 760           int macro_protect = 0;
 761
 762           if (cur_symbols->flags & MACRO_SYMBOL)
 763             continue;
 764
 765           fn = lookup_std_proto (cptr, name_len);
 766           if (fn == NULL || !REQUIRED (fn))
 767             continue;
 768
 769           if (!if_was_emitted)
 770             {
 771 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 772               if (cur_symbols->flags & ANSI_SYMBOL)
 773                 fprintf (outf,
 774          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 775               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 776                 fprintf (outf,
 777        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 778     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 779     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 780               else if (cur_symbols->flags & XOPEN_SYMBOL)
 781                 {
 782                 fprintf (outf,
 783        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 784    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 785                 }
 786               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 787                 {
 788                 fprintf (outf,
 789        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 790    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 791                 }
 792               else
 793                 {
 794                   fatal ("internal error for function %s", fn->fname);
 795                 }
 796               if_was_emitted = 1;
 797             }
 798
 799           /* In the case of memmove, protect in case the application
 800              defines it as a macro before including the header.  */
 801           if (!strcmp (fn->fname, "memmove")
 802               || !strcmp (fn->fname, "vprintf")
 803               || !strcmp (fn->fname, "vfprintf")
 804               || !strcmp (fn->fname, "vsprintf")
 805               || !strcmp (fn->fname, "rewinddir")
 806               || !strcmp (fn->fname, "abort"))
 807             macro_protect = 1;
 808
 809           if (macro_protect)
 810             fprintf (outf, "#ifndef %s\n", fn->fname);
 811           fprintf (outf, "extern %s %s (%s);\n",
 812                    fn->rtype, fn->fname, fn->params);
 813           if (macro_protect)
 814             fprintf (outf, "#endif\n");
 815         }
 816       if (if_was_emitted)
 817         fprintf (outf,
 818                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 819     }
 820   if (required_unseen_count)
 821     {
 822 #ifdef NO_IMPLICIT_EXTERN_C
 823       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 824 #endif
 825     }
 826
 827   switch (special_file_handling)
 828     {
 829     case errno_h:
 830       if (!seen_errno)
 831         fprintf (outf, "extern int errno;\n");
 832       break;
 833     case stdlib_h:
 834       if (!seen_EXIT_FAILURE)
 835         fprintf (outf, "#define EXIT_FAILURE 1\n");
 836       if (!seen_EXIT_SUCCESS)
 837         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 838       break;
 839     case sys_stat_h:
 840       if (!seen_S_ISBLK && seen_S_IFBLK)
 841         fprintf (outf,
 842                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 843       if (!seen_S_ISCHR && seen_S_IFCHR)
 844         fprintf (outf,
 845                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 846       if (!seen_S_ISDIR && seen_S_IFDIR)
 847         fprintf (outf,
 848                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 849       if (!seen_S_ISFIFO && seen_S_IFIFO)
 850         fprintf (outf,
 851                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 852       if (!seen_S_ISLNK && seen_S_IFLNK)
 853         fprintf (outf,
 854                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 855       if (!seen_S_ISREG && seen_S_IFREG)
 856         fprintf (outf,
 857                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 858       break;
 859
 860     default:
 861       break;
 862     }
 863
 864
 865 #if ADD_MISSING_EXTERN_C
 866   if (missing_extern_C_count + required_unseen_count > 0)
 867     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 868 #endif
 869 }
 870
 871 /* Returns 1 iff the file is properly protected from multiple inclusion:
 872    #ifndef PROTECT_NAME
 873    #define PROTECT_NAME
 874    #endif
 875
 876  */
 877
 878 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 879 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 880
 881 static int
 882 inf_skip_spaces (c)
 883      int c;
 884 {
 885   for (;;)
 886     {
 887       if (c == ' ' || c == '\t')
 888         c = INF_GET ();
 889       else if (c == '/')
 890         {
 891           c = INF_GET ();
 892           if (c != '*')
 893             {
 894               (void) INF_UNGET (c);
 895               return '/';
 896             }
 897           c = INF_GET ();
 898           for (;;)
 899             {
 900               if (c == EOF)
 901                 return EOF;
 902               else if (c != '*')
 903                 {
 904                   if (c == '\n')
 905                     source_lineno++, lineno++;
 906                   c = INF_GET ();
 907                 }
 908               else if ((c = INF_GET ()) == '/')
 909                 return INF_GET ();
 910             }
 911         }
 912       else
 913         break;
 914     }
 915   return c;
 916 }
 917
 918 /* Read into STR from inf_buffer upto DELIM.  */
 919
 920 static int
 921 inf_read_upto (str, delim)
 922      sstring *str;
 923      int delim;
 924 {
 925   int ch;
 926   for (;;)
 927     {
 928       ch = INF_GET ();
 929       if (ch == EOF || ch == delim)
 930         break;
 931       SSTRING_PUT (str, ch);
 932     }
 933   MAKE_SSTRING_SPACE (str, 1);
 934   *str->ptr = 0;
 935   return ch;
 936 }
 937
 938 static int
 939 inf_scan_ident (s, c)
 940      register sstring *s;
 941      int c;
 942 {
 943   s->ptr = s->base;
 944   if (ISALPHA (c) || c == '_')
 945     {
 946       for (;;)
 947         {
 948           SSTRING_PUT (s, c);
 949           c = INF_GET ();
 950           if (c == EOF || !(ISALNUM (c) || c == '_'))
 951             break;
 952         }
 953     }
 954   MAKE_SSTRING_SPACE (s, 1);
 955   *s->ptr = 0;
 956   return c;
 957 }
 958
 959 /* Returns 1 if the file is correctly protected against multiple
 960    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 961    and setting *endif_line to the final #endif.
 962    Otherwise return 0.  */
 963
 964 static int
 965 check_protection (ifndef_line, endif_line)
 966      int *ifndef_line, *endif_line;
 967 {
 968   int c;
 969   int if_nesting = 1; /* Level of nesting of #if's */
 970   char *protect_name = NULL; /* Identifier following initial #ifndef */
 971   int define_seen = 0;
 972
 973   /* Skip initial white space (including comments).  */
 974   for (;; lineno++)
 975     {
 976       c = inf_skip_spaces (' ');
 977       if (c == EOF)
 978         return 0;
 979       if (c != '\n')
 980         break;
 981     }
 982   if (c != '#')
 983     return 0;
 984   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 985   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 986     return 0;
 987
 988   /* So far so good: We've seen an initial #ifndef.  */
 989   *ifndef_line = lineno;
 990   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 991   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 992     return 0;
 993   protect_name = xstrdup (buf.base);
 994
 995   (void) INF_UNGET (c);
 996   c = inf_read_upto (&buf, '\n');
 997   if (c == EOF)
 998     return 0;
 999   lineno++;
1000
1001   for (;;)
1002     {
1003       c = inf_skip_spaces (' ');
1004       if (c == EOF)
1005         return 0;
1006       if (c == '\n')
1007         {
1008           lineno++;
1009           continue;
1010         }
1011       if (c != '#')
1012         goto skip_to_eol;
1013       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1014       if (SSTRING_LENGTH (&buf) == 0)
1015         ;
1016       else if (!strcmp (buf.base, "ifndef")
1017           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1018         {
1019           if_nesting++;
1020         }
1021       else if (!strcmp (buf.base, "endif"))
1022         {
1023           if_nesting--;
1024           if (if_nesting == 0)
1025             break;
1026         }
1027       else if (!strcmp (buf.base, "else"))
1028         {
1029           if (if_nesting == 1)
1030             return 0;
1031         }
1032       else if (!strcmp (buf.base, "define"))
1033         {
1034           if (if_nesting != 1)
1035             goto skip_to_eol;
1036           c = inf_skip_spaces (c);
1037           c = inf_scan_ident (&buf, c);
1038           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1039             define_seen = 1;
1040         }
1041     skip_to_eol:
1042       for (;;)
1043         {
1044           if (c == '\n' || c == EOF)
1045             break;
1046           c = INF_GET ();
1047         }
1048       if (c == EOF)
1049         return 0;
1050       lineno++;
1051     }
1052
1053   if (!define_seen)
1054      return 0;
1055   *endif_line = lineno;
1056   /* Skip final white space (including comments).  */
1057   for (;;)
1058     {
1059       c = inf_skip_spaces (' ');
1060       if (c == EOF)
1061         break;
1062       if (c != '\n')
1063         return 0;
1064     }
1065
1066   return 1;
1067 }
1068
1069 extern int main                 PARAMS ((int, char **));
1070
1071 int
1072 main (argc, argv)
1073      int argc;
1074      char **argv;
1075 {
1076   int inf_fd;
1077   struct stat sbuf;
1078   int c;
1079 #ifdef FIXPROTO_IGNORE_LIST
1080   int i;
1081 #endif
1082   const char *cptr;
1083   int ifndef_line;
1084   int endif_line;
1085   long to_read;
1086   long int inf_size;
1087   register struct symbol_list *cur_symbols;
1088
1089   if (argv[0] && argv[0][0])
1090     {
1091       register char *p;
1092
1093       progname = 0;
1094       for (p = argv[0]; *p; p++)
1095         if (*p == '/')
1096           progname = p;
1097       progname = progname ? progname+1 : argv[0];
1098     }
1099
1100   if (argc < 4)
1101     {
1102       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1103                progname);
1104       exit (FATAL_EXIT_CODE);
1105     }
1106
1107   inc_filename = argv[1];
1108   inc_filename_length = strlen (inc_filename);
1109
1110 #ifdef FIXPROTO_IGNORE_LIST
1111   for (i = 0; files_to_ignore[i] != NULL; i++)
1112     {
1113       char *ignore_name = files_to_ignore[i];
1114       int ignore_len = strlen (ignore_name);
1115       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1116         {
1117           if (ignore_name[ignore_len-1] == '/'
1118               || inc_filename[ignore_len] == '\0')
1119             {
1120               if (verbose)
1121                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1122               exit (SUCCESS_EXIT_CODE);
1123             }
1124         }
1125
1126     }
1127 #endif
1128
1129   if (strcmp (inc_filename, "sys/stat.h") == 0)
1130     special_file_handling = sys_stat_h;
1131   else if (strcmp (inc_filename, "errno.h") == 0)
1132     special_file_handling = errno_h, required_other++;
1133   else if (strcmp (inc_filename, "stdlib.h") == 0)
1134     special_file_handling = stdlib_h, required_other+=2;
1135   else if (strcmp (inc_filename, "stdio.h") == 0)
1136     special_file_handling = stdio_h;
1137   include_entry = std_include_table;
1138   while (include_entry->name != NULL
1139          && ((strcmp (include_entry->name, CONTINUED) == 0)
1140              || strcmp (inc_filename, include_entry->name) != 0))
1141     include_entry++;
1142
1143   if (include_entry->name != NULL)
1144     {
1145       struct std_include_entry *entry;
1146       cur_symbol_table_size = 0;
1147       for (entry = include_entry; ;)
1148         {
1149           if (entry->flags)
1150             add_symbols (entry->flags, entry->names);
1151           entry++;
1152           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1153             break;
1154         }
1155     }
1156   else
1157     symbol_table[0].names = NULL;
1158
1159   /* Count and mark the prototypes required for this include file.  */
1160   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1161     {
1162       int name_len;
1163       if (cur_symbols->flags & MACRO_SYMBOL)
1164         continue;
1165       cptr = cur_symbols->names;
1166       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1167         {
1168           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1169           required_unseen_count++;
1170           if (fn == NULL)
1171             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1172           else
1173             SET_REQUIRED (fn);
1174         }
1175     }
1176
1177   read_scan_file (argv[2], argc - 4, argv + 4);
1178
1179   inf_fd = open (argv[2], O_RDONLY, 0666);
1180   if (inf_fd < 0)
1181     {
1182       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1183                progname, argv[2]);
1184       perror (NULL);
1185       exit (FATAL_EXIT_CODE);
1186     }
1187   if (fstat (inf_fd, &sbuf) < 0)
1188     {
1189       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1190       perror (NULL);
1191       exit (FATAL_EXIT_CODE);
1192     }
1193   inf_size = sbuf.st_size;
1194   inf_buffer = (char *) xmalloc (inf_size + 2);
1195   inf_buffer[inf_size] = '\n';
1196   inf_buffer[inf_size + 1] = '\0';
1197   inf_limit = inf_buffer + inf_size;
1198   inf_ptr = inf_buffer;
1199
1200   to_read = inf_size;
1201   while (to_read > 0)
1202     {
1203       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1204       if (i < 0)
1205         {
1206           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1207           perror (NULL);
1208           exit (FATAL_EXIT_CODE);
1209         }
1210       if (i == 0)
1211         {
1212           inf_size -= to_read;
1213           break;
1214         }
1215       to_read -= i;
1216     }
1217
1218   close (inf_fd);
1219
1220   /* If file doesn't end with '\n', add one.  */
1221   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1222     inf_limit++;
1223
1224   unlink (argv[3]);
1225   outf = fopen (argv[3], "w");
1226   if (outf == NULL)
1227     {
1228       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1229                progname, argv[3]);
1230       perror (NULL);
1231       exit (FATAL_EXIT_CODE);
1232     }
1233
1234   lineno = 1;
1235
1236   if (check_protection (&ifndef_line, &endif_line))
1237     {
1238       lbrac_line = ifndef_line+1;
1239       rbrac_line = endif_line;
1240     }
1241   else
1242     {
1243       lbrac_line = 1;
1244       rbrac_line = -1;
1245     }
1246
1247   /* Reset input file.  */
1248   inf_ptr = inf_buffer;
1249   lineno = 1;
1250
1251   for (;;)
1252     {
1253       if (lineno == lbrac_line)
1254         write_lbrac ();
1255       if (lineno == rbrac_line)
1256         write_rbrac ();
1257       for (;;)
1258         {
1259           struct fn_decl *fn;
1260           c = INF_GET ();
1261           if (c == EOF)
1262             break;
1263           if (ISALPHA (c) || c == '_')
1264             {
1265               c = inf_scan_ident (&buf, c);
1266               (void) INF_UNGET (c);
1267               fputs (buf.base, outf);
1268               fn = lookup_std_proto (buf.base, strlen (buf.base));
1269               /* We only want to edit the declaration matching the one
1270                  seen by scan-decls, as there can be multiple
1271                  declarations, selected by #ifdef __STDC__ or whatever.  */
1272               if (fn && fn->partial && fn->partial->line_seen == lineno)
1273                 {
1274                   c = inf_skip_spaces (' ');
1275                   if (c == EOF)
1276                     break;
1277                   if (c == '(')
1278                     {
1279                       c = inf_skip_spaces (' ');
1280                       if (c == ')')
1281                         {
1282                           fprintf (outf, " _PARAMS((%s))", fn->params);
1283                         }
1284                       else
1285                         {
1286                           putc ('(', outf);
1287                           (void) INF_UNGET (c);
1288                         }
1289                     }
1290                   else
1291                     fprintf (outf, " %c", c);
1292                 }
1293             }
1294           else
1295             {
1296               putc (c, outf);
1297               if (c == '\n')
1298                 break;
1299             }
1300         }
1301       if (c == EOF)
1302         break;
1303       lineno++;
1304     }
1305   if (rbrac_line < 0)
1306     write_rbrac ();
1307
1308   fclose (outf);
1309
1310   return 0;
1311 }
1312 \f
1313
1314 static void
1315 v_fatal (str, ap)
1316   const char * str;
1317   va_list ap;
1318 {
1319   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1320   vfprintf (stderr, str, ap);
1321   fprintf (stderr, "\n");
1322
1323   exit (FATAL_EXIT_CODE);
1324 }
1325
1326 static void
1327 fatal VPARAMS ((const char *str, ...))
1328 {
1329 #ifndef ANSI_PROTOTYPES
1330   const char *str;
1331 #endif
1332   va_list ap;
1333
1334   VA_START(ap, str);
1335
1336 #ifndef ANSI_PROTOTYPES
1337   str = va_arg (ap, const char *);
1338 #endif
1339
1340   v_fatal(str, ap);
1341   va_end(ap);
1342 }