gcc/fix-header.c

   1 /* fix-header.c - Make C header file suitable for C++.
   2    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
   3    2002, 2003, 2004, 2006, 2007  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 3, 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; see the file COPYING3.  If not see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /* This program massages a system include file (such as stdio.h),
  20    into a form that is compatible with GNU C and GNU C++.
  21
  22    * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
  23    if they seem to be needed.  These prevent C++ compilers from name
  24    mangling the functions inside the braces.
  25
  26    * If an old-style incomplete function declaration is seen (without
  27    an argument list), and it is a "standard" function listed in
  28    the file sys-protos.h (and with a non-empty argument list), then
  29    the declaration is converted to a complete prototype by replacing
  30    the empty parameter list with the argument list from sys-protos.h.
  31
  32    * The program can be given a list of (names of) required standard
  33    functions (such as fclose for stdio.h).  If a required function
  34    is not seen in the input, then a prototype for it will be
  35    written to the output.
  36
  37    * If all of the non-comment code of the original file is protected
  38    against multiple inclusion:
  39         #ifndef FOO
  40         #define FOO
  41         <body of include file>
  42         #endif
  43    then extra matter added to the include file is placed inside the <body>.
  44
  45    * If the input file is OK (nothing needs to be done);
  46    the output file is not written (nor removed if it exists).
  47
  48    There are also some special actions that are done for certain
  49    well-known standard include files:
  50
  51    * If argv[1] is "sys/stat.h", the Posix.1 macros
  52    S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
  53    they were missing, and the corresponding "traditional" S_IFxxx
  54    macros were defined.
  55
  56    * If argv[1] is "errno.h", errno is declared if it was missing.
  57
  58    * TODO:  The input file should be read complete into memory, because:
  59    a) it needs to be scanned twice anyway, and
  60    b) it would be nice to allow update in place.
  61
  62    Usage:
  63         fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
  64    where:
  65    * FOO.H is the relative file name of the include file,
  66    as it would be #include'd by a C file.  (E.g. stdio.h)
  67    * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
  68    * OUTFILE.H is the full pathname for where to write the output file,
  69    if anything needs to be done.  (e.g. ./include/stdio.h)
  70    * OPTIONS can be -D or -I switches as you would pass to cpp.
  71
  72    Written by Per Bothner <bothner@cygnus.com>, July 1993.  */
  73
  74 #include "bconfig.h"
  75 #include "system.h"
  76 #include "coretypes.h"
  77 #include "tm.h"
  78 #include "obstack.h"
  79 #include "scan.h"
  80 #include "cpplib.h"
  81 #include "incpath.h"
  82 #include "errors.h"
  83
  84 #ifdef TARGET_EXTRA_INCLUDES
  85 void
  86 TARGET_EXTRA_INCLUDES (const char *sysroot ATTRIBUTE_UNUSED,
  87                        const char *iprefix ATTRIBUTE_UNUSED,
  88                        int stdinc ATTRIBUTE_UNUSED)
  89 {
  90 }
  91 #endif
  92
  93 #ifdef TARGET_EXTRA_PRE_INCLUDES
  94 void
  95 TARGET_EXTRA_PRE_INCLUDES (const char *sysroot ATTRIBUTE_UNUSED,
  96                            const char *iprefix ATTRIBUTE_UNUSED,
  97                            int stdinc ATTRIBUTE_UNUSED)
  98 {
  99 }
 100 #endif
 101
 102 struct line_maps line_table;
 103
 104 sstring buf;
 105
 106 int verbose = 0;
 107 int partial_count = 0;
 108 int warnings = 0;
 109
 110 #if ADD_MISSING_EXTERN_C
 111 int missing_extern_C_count = 0;
 112 #endif
 113
 114 #include "xsys-protos.h"
 115
 116 #ifdef FIXPROTO_IGNORE_LIST
 117 /* This is a currently unused feature.  */
 118
 119 /* List of files and directories to ignore.
 120    A directory name (ending in '/') means ignore anything in that
 121    directory.  (It might be more efficient to do directory pruning
 122    earlier in fixproto, but this is simpler and easier to customize.) */
 123
 124 static const char *const files_to_ignore[] = {
 125   "X11/",
 126   FIXPROTO_IGNORE_LIST
 127   0
 128 };
 129 #endif
 130
 131 char *inf_buffer;
 132 char *inf_limit;
 133 char *inf_ptr;
 134 static const char *cur_file;
 135
 136 /* Certain standard files get extra treatment */
 137
 138 enum special_file
 139 {
 140   no_special,
 141 #ifdef errno_h
 142 #undef errno_h
 143 #endif
 144   errno_h,
 145 #ifdef stdio_h
 146 #undef stdio_h
 147 #endif
 148   stdio_h,
 149 #ifdef stdlib_h
 150 #undef stdlib_h
 151 #endif
 152   stdlib_h,
 153 #ifdef sys_stat_h
 154 #undef sys_stat_h
 155 #endif
 156   sys_stat_h
 157 };
 158
 159 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 160    by an empty name (i.e. by "\0\0").  */
 161
 162 typedef const char *namelist;
 163
 164 /* The following macros provide the bits for symbol_flags.  */
 165 typedef int symbol_flags;
 166
 167 /* Used to mark names defined in the ANSI/ISO C standard.  */
 168 #define ANSI_SYMBOL 1
 169
 170 /* We no longer massage include files for POSIX or XOPEN symbols,
 171    as there are now several versions of the POSIX and XOPEN standards,
 172    and it would be a maintenance nightmare for us to track them all.
 173    Better to be compatible with the system include files.  */
 174 /*#define ADD_MISSING_POSIX 1 */
 175 /*#define ADD_MISSING_XOPEN 1 */
 176
 177 #if ADD_MISSING_POSIX
 178 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 179 #define POSIX1_SYMBOL 2
 180 #define POSIX2_SYMBOL 4
 181 #else
 182 #define POSIX1_SYMBOL 0
 183 #define POSIX2_SYMBOL 0
 184 #endif
 185
 186 #if ADD_MISSING_XOPEN
 187 /* Used to mark names defined in X/Open Portability Guide.  */
 188 #define XOPEN_SYMBOL 8
 189 /* Used to mark names defined in X/Open UNIX Extensions.  */
 190 #define XOPEN_EXTENDED_SYMBOL 16
 191 #else
 192 #define XOPEN_SYMBOL 0
 193 #define XOPEN_EXTENDED_SYMBOL 0
 194 #endif
 195
 196 /* Used to indicate names that are not functions */
 197 #define MACRO_SYMBOL 512
 198
 199 struct symbol_list {
 200   symbol_flags flags;
 201   namelist names;
 202 };
 203
 204 #define SYMBOL_TABLE_SIZE 10
 205 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 206 int cur_symbol_table_size;
 207
 208 static void add_symbols (symbol_flags, namelist);
 209 static struct fn_decl *lookup_std_proto (const char *, int);
 210 static void write_lbrac (void);
 211 static void recognized_macro (const char *);
 212 static void check_macro_names (cpp_reader *, namelist);
 213 static void read_scan_file (char *, int, char **);
 214 static void write_rbrac (void);
 215 static int inf_skip_spaces (int);
 216 static int inf_read_upto (sstring *, int);
 217 static int inf_scan_ident (sstring *, int);
 218 static int check_protection (int *, int *);
 219 static void cb_file_change (cpp_reader *, const struct line_map *);
 220
 221 static void
 222 add_symbols (symbol_flags flags, namelist names)
 223 {
 224   symbol_table[cur_symbol_table_size].flags = flags;
 225   symbol_table[cur_symbol_table_size].names = names;
 226   cur_symbol_table_size++;
 227   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 228     fatal ("too many calls to add_symbols");
 229   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 230 }
 231
 232 struct std_include_entry {
 233   const char *const name;
 234   const symbol_flags flags;
 235   const namelist names;
 236 };
 237
 238 const char NONE[] = "";  /* The empty namelist.  */
 239
 240 /* Special name to indicate a continuation line in std_include_table.  */
 241 const char CONTINUED[] = "";
 242
 243 const struct std_include_entry *include_entry;
 244
 245 const struct std_include_entry std_include_table [] = {
 246   { "ctype.h", ANSI_SYMBOL,
 247       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 248 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 249
 250   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 251
 252   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 253
 254   /* ANSI_SYMBOL is wrong, but ...  */
 255   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 256 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 257 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 258 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 259 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 260
 261   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 262
 263   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 264   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 265
 266 /*{ "limit.h", ... provided by gcc }, */
 267
 268   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 269
 270   { "math.h", ANSI_SYMBOL,
 271       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 272 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 273 tan\0tanh\0" },
 274
 275   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 276
 277   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 278
 279   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 280   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 281
 282   /* Left out signal() - its prototype is too complex for us!
 283      Also left out "sigaction sigaddset sigdelset sigemptyset
 284      sigfillset sigismember sigpending sigprocmask sigsuspend"
 285      because these need sigset_t or struct sigaction.
 286      Most systems that provide them will also declare them.  */
 287   { "signal.h", ANSI_SYMBOL, "raise\0" },
 288   { CONTINUED, POSIX1_SYMBOL, "kill\0" },
 289
 290   { "stdio.h", ANSI_SYMBOL,
 291       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 292 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 293 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 294 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 295 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 296 tmpnam\0ungetc\0" },
 297   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 298   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 299 /* Should perhaps also handle NULL, EOF, ... ? */
 300
 301   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 302      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 303      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 304      Should perhaps also add NULL */
 305   { "stdlib.h", ANSI_SYMBOL,
 306       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 307 exit\0free\0getenv\0labs\0malloc\0qsort\0rand\0realloc\0\
 308 srand\0strtod\0strtol\0strtoul\0system\0" },
 309   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 310   { CONTINUED, POSIX1_SYMBOL, "putenv\0" },
 311
 312   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 313 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 314 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 315 strtok\0strxfrm\0" },
 316 /* Should perhaps also add NULL and size_t */
 317
 318   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 319       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 320
 321   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 322
 323   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 324      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 325      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 326   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 327
 328   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 329
 330   { "sys/stat.h", POSIX1_SYMBOL,
 331       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 332   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 333       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 334 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 335   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 336
 337 #if 0
 338 /* How do we handle fd_set? */
 339   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 340   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 341 #endif
 342
 343   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 344   /* "sys/types.h" add types (not in old g++-include) */
 345
 346   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 347
 348   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 349   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 350       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 351 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 352
 353   { "tar.h", POSIX1_SYMBOL, NONE },
 354
 355   { "termios.h", POSIX1_SYMBOL,
 356       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 357
 358   { "time.h", ANSI_SYMBOL,
 359       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0" },
 360   { CONTINUED, POSIX1_SYMBOL, "tzset\0" },
 361
 362   { "unistd.h", POSIX1_SYMBOL,
 363       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 364 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 365 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 366 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 367 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 368 ttyname\0unlink\0write\0" },
 369   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 370   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 371       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 372
 373   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 374
 375   { NULL, 0, NONE }
 376 };
 377
 378 enum special_file special_file_handling = no_special;
 379
 380 /* They are set if the corresponding macro has been seen.  */
 381 /* The following are only used when handling sys/stat.h */
 382 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 383 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 384 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 385 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 386 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 387 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 388 /* The following are only used when handling errno.h */
 389 int seen_errno = 0;
 390 /* The following are only used when handling stdlib.h */
 391 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 392 \f
 393 struct obstack scan_file_obstack;
 394
 395 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 396
 397 static struct fn_decl *
 398 lookup_std_proto (const char *name, int name_length)
 399 {
 400   int i = hashstr (name, name_length) % HASH_SIZE;
 401   int i0 = i;
 402   for (;;)
 403     {
 404       struct fn_decl *fn;
 405       if (hash_tab[i] == 0)
 406         return NULL;
 407       fn = &std_protos[hash_tab[i]];
 408       if ((int) strlen (fn->fname) == name_length
 409           && strncmp (fn->fname, name, name_length) == 0)
 410         return fn;
 411       i = (i+1) % HASH_SIZE;
 412       gcc_assert (i != i0);
 413     }
 414 }
 415
 416 char *inc_filename;
 417 int inc_filename_length;
 418 FILE *outf;
 419 sstring line;
 420
 421 int lbrac_line, rbrac_line;
 422
 423 int required_unseen_count = 0;
 424 int required_other = 0;
 425
 426 static void
 427 write_lbrac (void)
 428 {
 429   if (partial_count)
 430     {
 431       fprintf (outf, "#ifndef _PARAMS\n");
 432       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 433       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 434       fprintf (outf, "#else\n");
 435       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 436       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 437     }
 438 }
 439
 440 struct partial_proto
 441 {
 442   struct partial_proto *next;
 443   struct fn_decl *fn;
 444   int line_seen;
 445 };
 446
 447 struct partial_proto *partial_proto_list = NULL;
 448
 449 struct partial_proto required_dummy_proto, seen_dummy_proto;
 450 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 451 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 452 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 453 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 454
 455 static void
 456 recognized_macro (const char *fname)
 457 {
 458   /* The original include file defines fname as a macro.  */
 459   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 460
 461   /* Since fname is a macro, don't require a prototype for it.  */
 462   if (fn)
 463     {
 464       if (REQUIRED (fn))
 465         required_unseen_count--;
 466       SET_SEEN (fn);
 467     }
 468
 469   switch (special_file_handling)
 470     {
 471     case errno_h:
 472       if (strcmp (fname, "errno") == 0 && !seen_errno)
 473         seen_errno = 1, required_other--;
 474       break;
 475     case stdlib_h:
 476       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 477         seen_EXIT_FAILURE = 1, required_other--;
 478       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 479         seen_EXIT_SUCCESS = 1, required_other--;
 480       break;
 481     case sys_stat_h:
 482       if (fname[0] == 'S' && fname[1] == '_')
 483         {
 484           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 485           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 486           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 487           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 488           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 489           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 490           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 491           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 492           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 493           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 494           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 495           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 496         }
 497       break;
 498
 499     default:
 500       break;
 501     }
 502 }
 503
 504 void
 505 recognized_extern (const cpp_token *name)
 506 {
 507   switch (special_file_handling)
 508     {
 509     case errno_h:
 510       if (cpp_ideq (name, "errno"))
 511         seen_errno = 1, required_other--;
 512       break;
 513
 514     default:
 515       break;
 516     }
 517 }
 518
 519 /* Called by scan_decls if it saw a function definition for a function
 520    named FNAME.  KIND is 'I' for an inline function; 'F' if a normal
 521    function declaration preceded by 'extern "C"' (or nested inside
 522    'extern "C"' braces); or 'f' for other function declarations.  */
 523
 524 void
 525 recognized_function (const cpp_token *fname, unsigned int line, int kind,
 526                      int have_arg_list)
 527 {
 528   struct partial_proto *partial;
 529   int i;
 530   struct fn_decl *fn;
 531
 532   fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
 533                          NODE_LEN (fname->val.node));
 534
 535   /* Remove the function from the list of required function.  */
 536   if (fn)
 537     {
 538       if (REQUIRED (fn))
 539         required_unseen_count--;
 540       SET_SEEN (fn);
 541     }
 542
 543   /* If we have a full prototype, we're done.  */
 544   if (have_arg_list)
 545     return;
 546
 547   if (kind == 'I')  /* don't edit inline function */
 548     return;
 549
 550   /* If the partial prototype was included from some other file,
 551      we don't need to patch it up (in this run).  */
 552   i = strlen (cur_file);
 553   if (i < inc_filename_length
 554       || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
 555     return;
 556
 557   if (fn == NULL)
 558     return;
 559   if (fn->params[0] == '\0')
 560     return;
 561
 562   /* We only have a partial function declaration,
 563      so remember that we have to add a complete prototype.  */
 564   partial_count++;
 565   partial
 566     = (struct partial_proto *)
 567       obstack_alloc (&scan_file_obstack,
 568                      sizeof (struct partial_proto));
 569   partial->line_seen = line;
 570   partial->fn = fn;
 571   fn->partial = partial;
 572   partial->next = partial_proto_list;
 573   partial_proto_list = partial;
 574   if (verbose)
 575     {
 576       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 577                inc_filename, fn->fname);
 578     }
 579 }
 580
 581 /* For any name in NAMES that is defined as a macro,
 582    call recognized_macro on it.  */
 583
 584 static void
 585 check_macro_names (cpp_reader *pfile, namelist names)
 586 {
 587   size_t len;
 588   while (*names)
 589     {
 590       len = strlen (names);
 591       if (cpp_defined (pfile, (const unsigned char *)names, len))
 592         recognized_macro (names);
 593       names += len + 1;
 594     }
 595 }
 596
 597 static void
 598 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
 599                 const struct line_map *map)
 600 {
 601   /* Just keep track of current file name.  */
 602   cur_file = map == NULL ? NULL : map->to_file;
 603 }
 604
 605 static void
 606 read_scan_file (char *in_fname, int argc, char **argv)
 607 {
 608   cpp_reader *scan_in;
 609   cpp_callbacks *cb;
 610   cpp_options *options;
 611   struct fn_decl *fn;
 612   int i, strings_processed;
 613   struct symbol_list *cur_symbols;
 614
 615   obstack_init (&scan_file_obstack);
 616
 617   linemap_init (&line_table);
 618   scan_in = cpp_create_reader (CLK_GNUC89, NULL, &line_table);
 619   cb = cpp_get_callbacks (scan_in);
 620   cb->file_change = cb_file_change;
 621
 622   /* We are going to be scanning a header file out of its proper context,
 623      so ignore warnings and errors.  */
 624   options = cpp_get_options (scan_in);
 625   options->inhibit_warnings = 1;
 626   options->inhibit_errors = 1;
 627   cpp_post_options (scan_in);
 628
 629   if (!cpp_read_main_file (scan_in, in_fname))
 630     exit (FATAL_EXIT_CODE);
 631
 632   cpp_change_file (scan_in, LC_RENAME, "<built-in>");
 633   cpp_init_builtins (scan_in, true);
 634   cpp_change_file (scan_in, LC_RENAME, in_fname);
 635
 636   /* Process switches after builtins so -D can override them.  */
 637   for (i = 0; i < argc; i += strings_processed)
 638     {
 639       strings_processed = 0;
 640       if (argv[i][0] == '-')
 641         {
 642           if (argv[i][1] == 'I')
 643             {
 644               if (argv[i][2] != '\0')
 645                 {
 646                   strings_processed = 1;
 647                   add_path (xstrdup (argv[i] + 2), BRACKET, false, false);
 648                 }
 649               else if (i + 1 != argc)
 650                 {
 651                   strings_processed = 2;
 652                   add_path (xstrdup (argv[i + 1]), BRACKET, false, false);
 653                 }
 654             }
 655           else if (argv[i][1] == 'D')
 656             {
 657               if (argv[i][2] != '\0')
 658                 strings_processed = 1, cpp_define (scan_in, argv[i] + 2);
 659               else if (i + 1 != argc)
 660                 strings_processed = 2, cpp_define (scan_in, argv[i + 1]);
 661             }
 662         }
 663
 664       if (strings_processed == 0)
 665         break;
 666     }
 667
 668   if (i < argc)
 669     cpp_error (scan_in, CPP_DL_ERROR, "invalid option `%s'", argv[i]);
 670   if (cpp_errors (scan_in))
 671     exit (FATAL_EXIT_CODE);
 672
 673   register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
 674                            NULL /* imultilib */, true /* stdinc */,
 675                            false /* cxx_stdinc */, false /* verbose */);
 676
 677   /* We are scanning a system header, so mark it as such.  */
 678   cpp_make_system_header (scan_in, 1, 0);
 679
 680   scan_decls (scan_in, argc, argv);
 681   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 682     check_macro_names (scan_in, cur_symbols->names);
 683
 684   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 685      If so, those functions are also required.  */
 686   if (special_file_handling == stdio_h
 687       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 688     {
 689       unsigned char getchar_call[] = "getchar();\n";
 690       int seen_filbuf = 0;
 691
 692       /* Scan the macro expansion of "getchar();".  */
 693       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
 694                        /* from_stage3 */ true);
 695       for (;;)
 696         {
 697           const cpp_token *t = cpp_get_token (scan_in);
 698
 699           if (t->type == CPP_EOF)
 700             break;
 701           else if (cpp_ideq (t, "_filbuf"))
 702             seen_filbuf++;
 703         }
 704
 705       if (seen_filbuf)
 706         {
 707           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 708           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 709           int need_flsbuf
 710             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 711
 712           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 713           if (need_filbuf + need_flsbuf)
 714             {
 715               const char *new_list;
 716               if (need_filbuf)
 717                 SET_REQUIRED (fn);
 718               if (need_flsbuf)
 719                 SET_REQUIRED (flsbuf_fn);
 720               if (need_flsbuf && need_filbuf)
 721                 new_list = "_filbuf\0_flsbuf\0";
 722               else if (need_flsbuf)
 723                 new_list = "_flsbuf\0";
 724               else /* if (need_flsbuf) */
 725                 new_list = "_filbuf\0";
 726               add_symbols (ANSI_SYMBOL, new_list);
 727               required_unseen_count += need_filbuf + need_flsbuf;
 728             }
 729         }
 730     }
 731
 732   if (required_unseen_count + partial_count + required_other == 0)
 733     {
 734       if (verbose)
 735         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 736       exit (SUCCESS_EXIT_CODE);
 737     }
 738   if (!verbose)
 739     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 740   else
 741     {
 742       if (required_unseen_count)
 743         fprintf (stderr, "%s: %d missing function declarations.\n",
 744                  inc_filename, required_unseen_count);
 745       if (partial_count)
 746         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 747                  inc_filename, partial_count);
 748     }
 749 }
 750
 751 static void
 752 write_rbrac (void)
 753 {
 754   struct fn_decl *fn;
 755   const char *cptr;
 756   struct symbol_list *cur_symbols;
 757
 758   if (required_unseen_count)
 759     {
 760 #ifdef NO_IMPLICIT_EXTERN_C
 761       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 762 #endif
 763     }
 764
 765   /* Now we print out prototypes for those functions that we haven't seen.  */
 766   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 767     {
 768       int if_was_emitted = 0;
 769       int name_len;
 770       cptr = cur_symbols->names;
 771       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 772         {
 773           int macro_protect = 0;
 774
 775           if (cur_symbols->flags & MACRO_SYMBOL)
 776             continue;
 777
 778           fn = lookup_std_proto (cptr, name_len);
 779           if (fn == NULL || !REQUIRED (fn))
 780             continue;
 781
 782           if (!if_was_emitted)
 783             {
 784 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 785               if (cur_symbols->flags & ANSI_SYMBOL)
 786                 fprintf (outf,
 787          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 788               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 789                 fprintf (outf,
 790        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 791     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 792     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 793               else if (cur_symbols->flags & XOPEN_SYMBOL)
 794                 {
 795                 fprintf (outf,
 796        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 797    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 798                 }
 799               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 800                 {
 801                 fprintf (outf,
 802        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 803    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 804                 }
 805               else
 806                 {
 807                   fatal ("internal error for function %s", fn->fname);
 808                 }
 809               if_was_emitted = 1;
 810             }
 811
 812           /* In the case of memmove, protect in case the application
 813              defines it as a macro before including the header.  */
 814           if (!strcmp (fn->fname, "memmove")
 815               || !strcmp (fn->fname, "putc")
 816               || !strcmp (fn->fname, "getc")
 817               || !strcmp (fn->fname, "vprintf")
 818               || !strcmp (fn->fname, "vfprintf")
 819               || !strcmp (fn->fname, "vsprintf")
 820               || !strcmp (fn->fname, "rewinddir")
 821               || !strcmp (fn->fname, "abort"))
 822             macro_protect = 1;
 823
 824           if (macro_protect)
 825             fprintf (outf, "#ifndef %s\n", fn->fname);
 826           fprintf (outf, "extern %s %s (%s);\n",
 827                    fn->rtype, fn->fname, fn->params);
 828           if (macro_protect)
 829             fprintf (outf, "#endif\n");
 830         }
 831       if (if_was_emitted)
 832         fprintf (outf,
 833                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 834     }
 835   if (required_unseen_count)
 836     {
 837 #ifdef NO_IMPLICIT_EXTERN_C
 838       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 839 #endif
 840     }
 841
 842   switch (special_file_handling)
 843     {
 844     case errno_h:
 845       if (!seen_errno)
 846         fprintf (outf, "extern int errno;\n");
 847       break;
 848     case stdlib_h:
 849       if (!seen_EXIT_FAILURE)
 850         fprintf (outf, "#define EXIT_FAILURE 1\n");
 851       if (!seen_EXIT_SUCCESS)
 852         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 853       break;
 854     case sys_stat_h:
 855       if (!seen_S_ISBLK && seen_S_IFBLK)
 856         fprintf (outf,
 857                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 858       if (!seen_S_ISCHR && seen_S_IFCHR)
 859         fprintf (outf,
 860                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 861       if (!seen_S_ISDIR && seen_S_IFDIR)
 862         fprintf (outf,
 863                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 864       if (!seen_S_ISFIFO && seen_S_IFIFO)
 865         fprintf (outf,
 866                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 867       if (!seen_S_ISLNK && seen_S_IFLNK)
 868         fprintf (outf,
 869                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 870       if (!seen_S_ISREG && seen_S_IFREG)
 871         fprintf (outf,
 872                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 873       break;
 874
 875     default:
 876       break;
 877     }
 878
 879 }
 880
 881 /* Returns 1 iff the file is properly protected from multiple inclusion:
 882    #ifndef PROTECT_NAME
 883    #define PROTECT_NAME
 884    #endif
 885
 886  */
 887
 888 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 889 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 890
 891 static int
 892 inf_skip_spaces (int c)
 893 {
 894   for (;;)
 895     {
 896       if (c == ' ' || c == '\t')
 897         c = INF_GET ();
 898       else if (c == '/')
 899         {
 900           c = INF_GET ();
 901           if (c != '*')
 902             {
 903               (void) INF_UNGET (c);
 904               return '/';
 905             }
 906           c = INF_GET ();
 907           for (;;)
 908             {
 909               if (c == EOF)
 910                 return EOF;
 911               else if (c != '*')
 912                 {
 913                   if (c == '\n')
 914                     source_lineno++, lineno++;
 915                   c = INF_GET ();
 916                 }
 917               else if ((c = INF_GET ()) == '/')
 918                 return INF_GET ();
 919             }
 920         }
 921       else
 922         break;
 923     }
 924   return c;
 925 }
 926
 927 /* Read into STR from inf_buffer upto DELIM.  */
 928
 929 static int
 930 inf_read_upto (sstring *str, int delim)
 931 {
 932   int ch;
 933   for (;;)
 934     {
 935       ch = INF_GET ();
 936       if (ch == EOF || ch == delim)
 937         break;
 938       SSTRING_PUT (str, ch);
 939     }
 940   MAKE_SSTRING_SPACE (str, 1);
 941   *str->ptr = 0;
 942   return ch;
 943 }
 944
 945 static int
 946 inf_scan_ident (sstring *s, int c)
 947 {
 948   s->ptr = s->base;
 949   if (ISIDST (c))
 950     {
 951       for (;;)
 952         {
 953           SSTRING_PUT (s, c);
 954           c = INF_GET ();
 955           if (c == EOF || !(ISIDNUM (c)))
 956             break;
 957         }
 958     }
 959   MAKE_SSTRING_SPACE (s, 1);
 960   *s->ptr = 0;
 961   return c;
 962 }
 963
 964 /* Returns 1 if the file is correctly protected against multiple
 965    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 966    and setting *endif_line to the final #endif.
 967    Otherwise return 0.  */
 968
 969 static int
 970 check_protection (int *ifndef_line, int *endif_line)
 971 {
 972   int c;
 973   int if_nesting = 1; /* Level of nesting of #if's */
 974   char *protect_name = NULL; /* Identifier following initial #ifndef */
 975   int define_seen = 0;
 976
 977   /* Skip initial white space (including comments).  */
 978   for (;; lineno++)
 979     {
 980       c = inf_skip_spaces (' ');
 981       if (c == EOF)
 982         return 0;
 983       if (c != '\n')
 984         break;
 985     }
 986   if (c != '#')
 987     return 0;
 988   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 989   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 990     return 0;
 991
 992   /* So far so good: We've seen an initial #ifndef.  */
 993   *ifndef_line = lineno;
 994   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 995   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 996     return 0;
 997   protect_name = xstrdup (buf.base);
 998
 999   (void) INF_UNGET (c);
1000   c = inf_read_upto (&buf, '\n');
1001   if (c == EOF)
1002     return 0;
1003   lineno++;
1004
1005   for (;;)
1006     {
1007       c = inf_skip_spaces (' ');
1008       if (c == EOF)
1009         return 0;
1010       if (c == '\n')
1011         {
1012           lineno++;
1013           continue;
1014         }
1015       if (c != '#')
1016         goto skip_to_eol;
1017       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1018       if (SSTRING_LENGTH (&buf) == 0)
1019         ;
1020       else if (!strcmp (buf.base, "ifndef")
1021           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1022         {
1023           if_nesting++;
1024         }
1025       else if (!strcmp (buf.base, "endif"))
1026         {
1027           if_nesting--;
1028           if (if_nesting == 0)
1029             break;
1030         }
1031       else if (!strcmp (buf.base, "else"))
1032         {
1033           if (if_nesting == 1)
1034             return 0;
1035         }
1036       else if (!strcmp (buf.base, "define"))
1037         {
1038           c = inf_skip_spaces (c);
1039           c = inf_scan_ident (&buf, c);
1040           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1041             define_seen = 1;
1042         }
1043     skip_to_eol:
1044       for (;;)
1045         {
1046           if (c == '\n' || c == EOF)
1047             break;
1048           c = INF_GET ();
1049         }
1050       if (c == EOF)
1051         return 0;
1052       lineno++;
1053     }
1054
1055   if (!define_seen)
1056      return 0;
1057   *endif_line = lineno;
1058   /* Skip final white space (including comments).  */
1059   for (;;)
1060     {
1061       c = inf_skip_spaces (' ');
1062       if (c == EOF)
1063         break;
1064       if (c != '\n')
1065         return 0;
1066     }
1067
1068   return 1;
1069 }
1070
1071 extern int main (int, char **);
1072
1073 int
1074 main (int argc, 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   struct symbol_list *cur_symbols;
1088
1089   progname = "fix-header";
1090   if (argv[0] && argv[0][0])
1091     {
1092       char *p;
1093
1094       progname = 0;
1095       for (p = argv[0]; *p; p++)
1096         if (*p == '/')
1097           progname = p;
1098       progname = progname ? progname+1 : argv[0];
1099     }
1100
1101   if (argc < 4)
1102     {
1103       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1104                progname);
1105       exit (FATAL_EXIT_CODE);
1106     }
1107
1108   inc_filename = argv[1];
1109   inc_filename_length = strlen (inc_filename);
1110
1111 #ifdef FIXPROTO_IGNORE_LIST
1112   for (i = 0; files_to_ignore[i] != NULL; i++)
1113     {
1114       const char *const ignore_name = files_to_ignore[i];
1115       int ignore_len = strlen (ignore_name);
1116       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1117         {
1118           if (ignore_name[ignore_len-1] == '/'
1119               || inc_filename[ignore_len] == '\0')
1120             {
1121               if (verbose)
1122                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1123               exit (SUCCESS_EXIT_CODE);
1124             }
1125         }
1126
1127     }
1128 #endif
1129
1130   if (strcmp (inc_filename, "sys/stat.h") == 0)
1131     special_file_handling = sys_stat_h;
1132   else if (strcmp (inc_filename, "errno.h") == 0)
1133     special_file_handling = errno_h, required_other++;
1134   else if (strcmp (inc_filename, "stdlib.h") == 0)
1135     special_file_handling = stdlib_h, required_other+=2;
1136   else if (strcmp (inc_filename, "stdio.h") == 0)
1137     special_file_handling = stdio_h;
1138   include_entry = std_include_table;
1139   while (include_entry->name != NULL
1140          && ((strcmp (include_entry->name, CONTINUED) == 0)
1141              || strcmp (inc_filename, include_entry->name) != 0))
1142     include_entry++;
1143
1144   if (include_entry->name != NULL)
1145     {
1146       const struct std_include_entry *entry;
1147       cur_symbol_table_size = 0;
1148       for (entry = include_entry; ;)
1149         {
1150           if (entry->flags)
1151             add_symbols (entry->flags, entry->names);
1152           entry++;
1153           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1154             break;
1155         }
1156     }
1157   else
1158     symbol_table[0].names = NULL;
1159
1160   /* Count and mark the prototypes required for this include file.  */
1161   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1162     {
1163       int name_len;
1164       if (cur_symbols->flags & MACRO_SYMBOL)
1165         continue;
1166       cptr = cur_symbols->names;
1167       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1168         {
1169           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1170           required_unseen_count++;
1171           if (fn == NULL)
1172             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1173           else
1174             SET_REQUIRED (fn);
1175         }
1176     }
1177
1178   read_scan_file (argv[2], argc - 4, argv + 4);
1179
1180   inf_fd = open (argv[2], O_RDONLY, 0666);
1181   if (inf_fd < 0)
1182     {
1183       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1184                progname, argv[2]);
1185       perror (NULL);
1186       exit (FATAL_EXIT_CODE);
1187     }
1188   if (fstat (inf_fd, &sbuf) < 0)
1189     {
1190       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1191       perror (NULL);
1192       exit (FATAL_EXIT_CODE);
1193     }
1194   inf_size = sbuf.st_size;
1195   inf_buffer = XNEWVEC (char, inf_size + 2);
1196   inf_ptr = inf_buffer;
1197
1198   to_read = inf_size;
1199   while (to_read > 0)
1200     {
1201       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1202       if (i < 0)
1203         {
1204           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1205           perror (NULL);
1206           exit (FATAL_EXIT_CODE);
1207         }
1208       if (i == 0)
1209         {
1210           inf_size -= to_read;
1211           break;
1212         }
1213       to_read -= i;
1214     }
1215
1216   close (inf_fd);
1217
1218   /* Inf_size may have changed if read was short (as on VMS) */
1219   inf_buffer[inf_size] = '\n';
1220   inf_buffer[inf_size + 1] = '\0';
1221   inf_limit = inf_buffer + inf_size;
1222
1223   /* If file doesn't end with '\n', add one.  */
1224   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1225     inf_limit++;
1226
1227   unlink (argv[3]);
1228   outf = fopen (argv[3], "w");
1229   if (outf == NULL)
1230     {
1231       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1232                progname, argv[3]);
1233       perror (NULL);
1234       exit (FATAL_EXIT_CODE);
1235     }
1236
1237   lineno = 1;
1238
1239   if (check_protection (&ifndef_line, &endif_line))
1240     {
1241       lbrac_line = ifndef_line+1;
1242       rbrac_line = endif_line;
1243     }
1244   else
1245     {
1246       lbrac_line = 1;
1247       rbrac_line = -1;
1248     }
1249
1250   /* Reset input file.  */
1251   inf_ptr = inf_buffer;
1252   lineno = 1;
1253
1254   for (;;)
1255     {
1256       if (lineno == lbrac_line)
1257         write_lbrac ();
1258       if (lineno == rbrac_line)
1259         write_rbrac ();
1260       for (;;)
1261         {
1262           struct fn_decl *fn;
1263           c = INF_GET ();
1264           if (c == EOF)
1265             break;
1266           if (ISIDST (c))
1267             {
1268               c = inf_scan_ident (&buf, c);
1269               (void) INF_UNGET (c);
1270               fputs (buf.base, outf);
1271               fn = lookup_std_proto (buf.base, strlen (buf.base));
1272               /* We only want to edit the declaration matching the one
1273                  seen by scan-decls, as there can be multiple
1274                  declarations, selected by #ifdef __STDC__ or whatever.  */
1275               if (fn && fn->partial && fn->partial->line_seen == lineno)
1276                 {
1277                   c = inf_skip_spaces (' ');
1278                   if (c == EOF)
1279                     break;
1280                   if (c == '(')
1281                     {
1282                       c = inf_skip_spaces (' ');
1283                       if (c == ')')
1284                         {
1285                           fprintf (outf, " _PARAMS((%s))", fn->params);
1286                         }
1287                       else
1288                         {
1289                           putc ('(', outf);
1290                           (void) INF_UNGET (c);
1291                         }
1292                     }
1293                   else
1294                     fprintf (outf, " %c", c);
1295                 }
1296             }
1297           else
1298             {
1299               putc (c, outf);
1300               if (c == '\n')
1301                 break;
1302             }
1303         }
1304       if (c == EOF)
1305         break;
1306       lineno++;
1307     }
1308   if (rbrac_line < 0)
1309     write_rbrac ();
1310
1311   fclose (outf);
1312
1313   return 0;
1314 }