gcc/fix-header.c

   1 /* fix-header.c - Make C header file suitable for C++.
   2    Copyright (C) 1993, 94-99, 2000 Free Software Foundation, Inc.
   3
   4 This program is free software; you can redistribute it and/or modify it
   5 under the terms of the GNU General Public License as published by the
   6 Free Software Foundation; either version 2, or (at your option) any
   7 later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* This program massages a system include file (such as stdio.h),
  19    into a form that is compatible with GNU C and GNU C++.
  20
  21    * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
  22    if they seem to be needed.  These prevent C++ compilers from name
  23    mangling the functions inside the braces.
  24
  25    * If an old-style incomplete function declaration is seen (without
  26    an argument list), and it is a "standard" function listed in
  27    the file sys-protos.h (and with a non-empty argument list), then
  28    the declaration is converted to a complete prototype by replacing
  29    the empty parameter list with the argument list from sys-protos.h.
  30
  31    * The program can be given a list of (names of) required standard
  32    functions (such as fclose for stdio.h).  If a required function
  33    is not seen in the input, then a prototype for it will be
  34    written to the output.
  35
  36    * If all of the non-comment code of the original file is protected
  37    against multiple inclusion:
  38         #ifndef FOO
  39         #define FOO
  40         <body of include file>
  41         #endif
  42    then extra matter added to the include file is placed inside the <body>.
  43
  44    * If the input file is OK (nothing needs to be done);
  45    the output file is not written (nor removed if it exists).
  46
  47    There are also some special actions that are done for certain
  48    well-known standard include files:
  49
  50    * If argv[1] is "sys/stat.h", the Posix.1 macros
  51    S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
  52    they were missing, and the corresponding "traditional" S_IFxxx
  53    macros were defined.
  54
  55    * If argv[1] is "errno.h", errno is declared if it was missing.
  56
  57    * TODO:  The input file should be read complete into memory, because:
  58    a) it needs to be scanned twice anyway, and
  59    b) it would be nice to allow update in place.
  60
  61    Usage:
  62         fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
  63    where:
  64    * FOO.H is the relative file name of the include file,
  65    as it would be #include'd by a C file.  (E.g. stdio.h)
  66    * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
  67    * OUTFILE.H is the full pathname for where to write the output file,
  68    if anything needs to be done.  (e.g. ./include/stdio.h)
  69    * OPTIONS are such as you would pass to cpp.
  70
  71    Written by Per Bothner <bothner@cygnus.com>, July 1993.  */
  72
  73 #include "hconfig.h"
  74 #include "system.h"
  75 #include "obstack.h"
  76 #include "scan.h"
  77 #include "cpplib.h"
  78
  79 static void v_fatal PARAMS ((const char *, va_list)) ATTRIBUTE_NORETURN;
  80 static void fatal PARAMS ((const char *, ...)) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  81
  82 sstring buf;
  83
  84 int verbose = 0;
  85 int partial_count = 0;
  86 int warnings = 0;
  87
  88 /* We no longer need to add extern "C", because cpp implicitly
  89    forces the standard include files to be treated as C.  */
  90 /*#define ADD_MISSING_EXTERN_C 1 */
  91
  92 #if ADD_MISSING_EXTERN_C
  93 int missing_extern_C_count = 0;
  94 #endif
  95
  96 #include "xsys-protos.h"
  97
  98 #ifdef FIXPROTO_IGNORE_LIST
  99 /* This is a currently unused feature.  */
 100
 101 /* List of files and directories to ignore.
 102    A directory name (ending in '/') means ignore anything in that
 103    directory.  (It might be more efficient to do directory pruning
 104    earlier in fixproto, but this is simpler and easier to customize.) */
 105
 106 static char *files_to_ignore[] = {
 107   "X11/",
 108   FIXPROTO_IGNORE_LIST
 109   0
 110 };
 111 #endif
 112
 113 char *inf_buffer;
 114 char *inf_limit;
 115 char *inf_ptr;
 116
 117 /* Certain standard files get extra treatment */
 118
 119 enum special_file
 120 {
 121   no_special,
 122 #ifdef errno_h
 123 #undef errno_h
 124 #endif
 125   errno_h,
 126 #ifdef stdio_h
 127 #undef stdio_h
 128 #endif
 129   stdio_h,
 130 #ifdef stdlib_h
 131 #undef stdlib_h
 132 #endif
 133   stdlib_h,
 134 #ifdef sys_stat_h
 135 #undef sys_stat_h
 136 #endif
 137   sys_stat_h
 138 };
 139
 140 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
 141    by an empty name (i.e. by "\0\0").  */
 142
 143 typedef const char *namelist;
 144
 145 /* The following macros provide the bits for symbol_flags.  */
 146 typedef int symbol_flags;
 147
 148 /* Used to mark names defined in the ANSI/ISO C standard.  */
 149 #define ANSI_SYMBOL 1
 150
 151 /* We no longer massage include files for POSIX or XOPEN symbols,
 152    as there are now several versions of the POSIX and XOPEN standards,
 153    and it would be a maintenance nightmare for us to track them all.
 154    Better to be compatible with the system include files.  */
 155 /*#define ADD_MISSING_POSIX 1 */
 156 /*#define ADD_MISSING_XOPEN 1 */
 157
 158 #if ADD_MISSING_POSIX
 159 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
 160 #define POSIX1_SYMBOL 2
 161 #define POSIX2_SYMBOL 4
 162 #else
 163 #define POSIX1_SYMBOL 0
 164 #define POSIX2_SYMBOL 0
 165 #endif
 166
 167 #if ADD_MISSING_XOPEN
 168 /* Used to mark names defined in X/Open Portability Guide.  */
 169 #define XOPEN_SYMBOL 8
 170 /* Used to mark names defined in X/Open UNIX Extensions.  */
 171 #define XOPEN_EXTENDED_SYMBOL 16
 172 #else
 173 #define XOPEN_SYMBOL 0
 174 #define XOPEN_EXTENDED_SYMBOL 0
 175 #endif
 176
 177 /* Used to indicate names that are not functions */
 178 #define MACRO_SYMBOL 512
 179
 180 struct symbol_list {
 181   symbol_flags flags;
 182   namelist names;
 183 };
 184
 185 #define SYMBOL_TABLE_SIZE 10
 186 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
 187 int cur_symbol_table_size;
 188
 189 static void add_symbols PARAMS ((symbol_flags, namelist));
 190 static struct fn_decl *lookup_std_proto PARAMS ((const char *, int));
 191 static void write_lbrac PARAMS ((void));
 192 static void recognized_macro PARAMS ((const char *));
 193 static void check_macro_names PARAMS ((cpp_reader *, namelist));
 194 static void read_scan_file PARAMS ((char *, int, char **));
 195 static void write_rbrac PARAMS ((void));
 196 static int inf_skip_spaces PARAMS ((int));
 197 static int inf_read_upto PARAMS ((sstring *, int));
 198 static int inf_scan_ident PARAMS ((sstring *, int));
 199 static int check_protection PARAMS ((int *, int *));
 200
 201 static void
 202 add_symbols (flags, names)
 203      symbol_flags flags;
 204      namelist names;
 205 {
 206   symbol_table[cur_symbol_table_size].flags = flags;
 207   symbol_table[cur_symbol_table_size].names = names;
 208   cur_symbol_table_size++;
 209   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
 210     fatal ("too many calls to add_symbols");
 211   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
 212 }
 213
 214 struct std_include_entry {
 215   const char *name;
 216   symbol_flags flags;
 217   namelist names;
 218 };
 219
 220 const char NONE[] = "";  /* The empty namelist.  */
 221
 222 /* Special name to indicate a continuation line in std_include_table.  */
 223 const char CONTINUED[] = "";
 224
 225 struct std_include_entry *include_entry;
 226
 227 struct std_include_entry std_include_table [] = {
 228   { "ctype.h", ANSI_SYMBOL,
 229       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
 230 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 231
 232   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 233
 234   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 235
 236   /* ANSI_SYMBOL is wrong, but ...  */
 237   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
 238 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
 239 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
 240 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
 241 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 242
 243   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 244
 245   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
 246   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 247
 248 /*{ "limit.h", ... provided by gcc }, */
 249
 250   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 251
 252   { "math.h", ANSI_SYMBOL,
 253       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
 254 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
 255 tan\0tanh\0" },
 256
 257   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 258
 259   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 260
 261   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
 262   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 263
 264   /* Left out signal() - its prototype is too complex for us!
 265      Also left out "sigaction sigaddset sigdelset sigemptyset
 266      sigfillset sigismember sigpending sigprocmask sigsuspend"
 267      because these need sigset_t or struct sigaction.
 268      Most systems that provide them will also declare them.  */
 269   { "signal.h", ANSI_SYMBOL, "kill\0raise\0" },
 270
 271   { "stdio.h", ANSI_SYMBOL,
 272       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
 273 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
 274 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
 275 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
 276 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
 277 tmpnam\0ungetc\0" },
 278   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
 279   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
 280 /* Should perhaps also handle NULL, EOF, ... ? */
 281
 282   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
 283      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
 284      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
 285      Should perhaps also add NULL */
 286   { "stdlib.h", ANSI_SYMBOL,
 287       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
 288 exit\0free\0getenv\0labs\0malloc\0putenv\0qsort\0rand\0realloc\0\
 289 srand\0strtod\0strtol\0strtoul\0system\0" },
 290   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
 291
 292   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
 293 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
 294 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
 295 strtok\0strxfrm\0" },
 296 /* Should perhaps also add NULL and size_t */
 297
 298   { "strings.h", XOPEN_EXTENDED_SYMBOL,
 299       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 300
 301   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 302
 303   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
 304      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
 305      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
 306   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 307
 308   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 309
 310   { "sys/stat.h", POSIX1_SYMBOL,
 311       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
 312   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 313       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
 314 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
 315   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 316
 317 #if 0
 318 /* How do we handle fd_set? */
 319   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
 320   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
 321 #endif
 322
 323   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
 324   /* "sys/types.h" add types (not in old g++-include) */
 325
 326   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 327
 328   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
 329   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
 330       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
 331 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 332
 333   { "tar.h", POSIX1_SYMBOL, NONE },
 334
 335   { "termios.h", POSIX1_SYMBOL,
 336       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 337
 338   { "time.h", ANSI_SYMBOL,
 339       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0tzset\0" },
 340
 341   { "unistd.h", POSIX1_SYMBOL,
 342       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
 343 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
 344 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
 345 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
 346 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
 347 ttyname\0unlink\0write\0" },
 348   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
 349   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
 350       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 351
 352   { "utime.h", POSIX1_SYMBOL, "utime\0" },
 353
 354   { NULL, 0, NONE }
 355 };
 356
 357 enum special_file special_file_handling = no_special;
 358
 359 /* They are set if the corresponding macro has been seen.  */
 360 /* The following are only used when handling sys/stat.h */
 361 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
 362 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
 363 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
 364 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
 365 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
 366 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
 367 /* The following are only used when handling errno.h */
 368 int seen_errno = 0;
 369 /* The following are only used when handling stdlib.h */
 370 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 371 \f
 372 #define obstack_chunk_alloc xmalloc
 373 #define obstack_chunk_free free
 374 struct obstack scan_file_obstack;
 375
 376 /* NOTE:  If you edit this, also edit gen-protos.c !! */
 377
 378 static struct fn_decl *
 379 lookup_std_proto (name, name_length)
 380      const char *name;
 381      int name_length;
 382 {
 383   int i = hashstr (name, name_length) % HASH_SIZE;
 384   int i0 = i;
 385   for (;;)
 386     {
 387       struct fn_decl *fn;
 388       if (hash_tab[i] == 0)
 389         return NULL;
 390       fn = &std_protos[hash_tab[i]];
 391       if ((int) strlen (fn->fname) == name_length
 392           && strncmp (fn->fname, name, name_length) == 0)
 393         return fn;
 394       i = (i+1) % HASH_SIZE;
 395       if (i == i0)
 396         abort ();
 397     }
 398 }
 399
 400 char *inc_filename;
 401 int inc_filename_length;
 402 const char *progname = "fix-header";
 403 FILE *outf;
 404 sstring line;
 405
 406 int lbrac_line, rbrac_line;
 407
 408 int required_unseen_count = 0;
 409 int required_other = 0;
 410
 411 static void
 412 write_lbrac ()
 413 {
 414
 415 #if ADD_MISSING_EXTERN_C
 416   if (missing_extern_C_count + required_unseen_count > 0)
 417     fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 418 #endif
 419
 420   if (partial_count)
 421     {
 422       fprintf (outf, "#ifndef _PARAMS\n");
 423       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
 424       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
 425       fprintf (outf, "#else\n");
 426       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
 427       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
 428     }
 429 }
 430
 431 struct partial_proto
 432 {
 433   struct partial_proto *next;
 434   char *fname;  /* name of function */
 435   char *rtype;  /* return type */
 436   struct fn_decl *fn;
 437   int line_seen;
 438 };
 439
 440 struct partial_proto *partial_proto_list = NULL;
 441
 442 struct partial_proto required_dummy_proto, seen_dummy_proto;
 443 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
 444 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
 445 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
 446 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 447
 448 static void
 449 recognized_macro (fname)
 450      const char *fname;
 451 {
 452   /* The original include file defines fname as a macro.  */
 453   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 454
 455   /* Since fname is a macro, don't require a prototype for it.  */
 456   if (fn)
 457     {
 458       if (REQUIRED (fn))
 459         required_unseen_count--;
 460       SET_SEEN (fn);
 461     }
 462
 463   switch (special_file_handling)
 464     {
 465     case errno_h:
 466       if (strcmp (fname, "errno") == 0 && !seen_errno)
 467         seen_errno = 1, required_other--;
 468       break;
 469     case stdlib_h:
 470       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
 471         seen_EXIT_FAILURE = 1, required_other--;
 472       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
 473         seen_EXIT_SUCCESS = 1, required_other--;
 474       break;
 475     case sys_stat_h:
 476       if (fname[0] == 'S' && fname[1] == '_')
 477         {
 478           if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
 479           else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
 480           else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
 481           else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
 482           else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
 483           else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
 484           else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
 485           else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
 486           else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
 487           else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
 488           else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
 489           else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
 490         }
 491       break;
 492
 493     default:
 494       break;
 495     }
 496 }
 497
 498 void
 499 recognized_extern (name, name_length, type, type_length)
 500      const char *name;
 501      const char *type ATTRIBUTE_UNUSED;
 502      int name_length, type_length ATTRIBUTE_UNUSED;
 503 {
 504   switch (special_file_handling)
 505     {
 506     case errno_h:
 507       if (name_length == 5 && strncmp (name, "errno", 5) == 0 && !seen_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, with return type RTYPE, and argument list ARGS,
 518    in source file FILE_SEEN on line LINE_SEEN.
 519    KIND is 'I' for an inline function;
 520    'F' if a normal function declaration preceded by 'extern "C"'
 521    (or nested inside 'extern "C"' braces); or
 522    'f' for other function declarations.  */
 523
 524 void
 525 recognized_function (fname, fname_length,
 526                      kind, rtype, rtype_length,
 527                      have_arg_list, file_seen, line_seen)
 528      const char *fname;
 529      int fname_length;
 530      int kind; /* One of 'f' 'F' or 'I' */
 531      const char *rtype;
 532      int rtype_length;
 533      int have_arg_list;
 534      const char *file_seen;
 535      int line_seen;
 536 {
 537   struct partial_proto *partial;
 538   int i;
 539   struct fn_decl *fn;
 540 #if ADD_MISSING_EXTERN_C
 541   if (kind == 'f')
 542     missing_extern_C_count++;
 543 #endif
 544
 545   fn = lookup_std_proto (fname, fname_length);
 546
 547   /* Remove the function from the list of required function.  */
 548   if (fn)
 549     {
 550       if (REQUIRED (fn))
 551         required_unseen_count--;
 552       SET_SEEN (fn);
 553     }
 554
 555   /* If we have a full prototype, we're done.  */
 556   if (have_arg_list)
 557     return;
 558
 559   if (kind == 'I')  /* don't edit inline function */
 560     return;
 561
 562   /* If the partial prototype was included from some other file,
 563      we don't need to patch it up (in this run).  */
 564   i = strlen (file_seen);
 565   if (i < inc_filename_length
 566       || strcmp (inc_filename, file_seen + (i - inc_filename_length)) != 0)
 567     return;
 568
 569   if (fn == NULL)
 570     return;
 571   if (fn->params[0] == '\0' || strcmp (fn->params, "void") == 0)
 572     return;
 573
 574   /* We only have a partial function declaration,
 575      so remember that we have to add a complete prototype.  */
 576   partial_count++;
 577   partial = (struct partial_proto *)
 578     obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
 579   partial->fname = obstack_alloc (&scan_file_obstack, fname_length + 1);
 580   bcopy (fname, partial->fname, fname_length);
 581   partial->fname[fname_length] = 0;
 582   partial->rtype = obstack_alloc (&scan_file_obstack, rtype_length + 1);
 583   sprintf (partial->rtype, "%.*s", rtype_length, rtype);
 584   partial->line_seen = line_seen;
 585   partial->fn = fn;
 586   fn->partial = partial;
 587   partial->next = partial_proto_list;
 588   partial_proto_list = partial;
 589   if (verbose)
 590     {
 591       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
 592                inc_filename, partial->fname);
 593     }
 594 }
 595
 596 /* For any name in NAMES that is defined as a macro,
 597    call recognized_macro on it.  */
 598
 599 static void
 600 check_macro_names (pfile, names)
 601      cpp_reader *pfile;
 602      namelist names;
 603 {
 604   while (*names)
 605     {
 606       if (cpp_defined (pfile, names, -1))
 607         recognized_macro (names);
 608       names += strlen (names) + 1;
 609     }
 610 }
 611
 612 static void
 613 read_scan_file (in_fname, argc, argv)
 614      char *in_fname;
 615      int argc;
 616      char **argv;
 617 {
 618   cpp_reader scan_in;
 619   cpp_options scan_options;
 620   struct fn_decl *fn;
 621   int i;
 622   register struct symbol_list *cur_symbols;
 623
 624   obstack_init (&scan_file_obstack);
 625
 626   cpp_reader_init (&scan_in);
 627   scan_in.opts = &scan_options;
 628   cpp_options_init (&scan_options);
 629   /* We are going to be scanning a header file out of its proper context,
 630      so ignore warnings and errors.  */
 631   scan_options.inhibit_warnings = 1;
 632   scan_options.inhibit_errors = 1;
 633   i = cpp_handle_options (&scan_in, argc, argv);
 634   if (i < argc && ! CPP_FATAL_ERRORS (&scan_in))
 635     cpp_fatal (&scan_in, "Invalid option `%s'", argv[i]);
 636   if (CPP_FATAL_ERRORS (&scan_in))
 637     exit (FATAL_EXIT_CODE);
 638
 639   if (! cpp_start_read (&scan_in, in_fname))
 640     exit (FATAL_EXIT_CODE);
 641   CPP_OPTIONS (&scan_in)->no_line_commands = 1;
 642
 643   scan_decls (&scan_in, argc, argv);
 644   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 645     check_macro_names (&scan_in, cur_symbols->names);
 646
 647   if (verbose && (scan_in.errors + warnings) > 0)
 648     fprintf (stderr, "(%s: %d errors and %d warnings from cpp)\n",
 649              inc_filename, scan_in.errors, warnings);
 650   if (scan_in.errors)
 651     exit (SUCCESS_EXIT_CODE);
 652
 653   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
 654      If so, those functions are also required.  */
 655   if (special_file_handling == stdio_h
 656       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
 657     {
 658       static char getchar_call[] = "getchar();";
 659       cpp_buffer *buf
 660         = cpp_push_buffer (&scan_in, getchar_call, sizeof(getchar_call) - 1);
 661       int old_written = CPP_WRITTEN (&scan_in);
 662       int seen_filbuf = 0;
 663
 664       /* Scan the macro expansion of "getchar();".  */
 665       for (;;)
 666         {
 667           enum cpp_token token = cpp_get_token (&scan_in);
 668           int length = CPP_WRITTEN (&scan_in) - old_written;
 669           CPP_SET_WRITTEN (&scan_in, old_written);
 670           if (token == CPP_EOF) /* Should not happen ...  */
 671             break;
 672           if (token == CPP_POP && CPP_BUFFER (&scan_in) == buf)
 673             {
 674               cpp_pop_buffer (&scan_in);
 675               break;
 676             }
 677           if (token == CPP_NAME && length == 7
 678               && strcmp ("_filbuf", scan_in.token_buffer + old_written) == 0)
 679             seen_filbuf++;
 680         }
 681       if (seen_filbuf)
 682         {
 683           int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
 684           struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
 685           int need_flsbuf
 686             = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 687
 688           /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
 689           if (need_filbuf + need_flsbuf)
 690             {
 691               const char *new_list;
 692               if (need_filbuf)
 693                 SET_REQUIRED (fn);
 694               if (need_flsbuf)
 695                 SET_REQUIRED (flsbuf_fn);
 696               if (need_flsbuf + need_filbuf == 2)
 697                 new_list = "_filbuf\0_flsbuf\0";
 698               else if (need_flsbuf)
 699                 new_list = "_flsbuf\0";
 700               else /* if (need_flsbuf) */
 701                 new_list = "_filbuf\0";
 702               add_symbols (ANSI_SYMBOL, new_list);
 703               required_unseen_count += need_filbuf + need_flsbuf;
 704             }
 705         }
 706     }
 707
 708   if (required_unseen_count + partial_count + required_other
 709 #if ADD_MISSING_EXTERN_C
 710       + missing_extern_C_count
 711 #endif
 712       == 0)
 713     {
 714       if (verbose)
 715         fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
 716       exit (SUCCESS_EXIT_CODE);
 717     }
 718   if (!verbose)
 719     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
 720   else
 721     {
 722       if (required_unseen_count)
 723         fprintf (stderr, "%s: %d missing function declarations.\n",
 724                  inc_filename, required_unseen_count);
 725       if (partial_count)
 726         fprintf (stderr, "%s: %d non-prototype function declarations.\n",
 727                  inc_filename, partial_count);
 728 #if ADD_MISSING_EXTERN_C
 729       if (missing_extern_C_count)
 730         fprintf (stderr,
 731                  "%s: %d declarations not protected by extern \"C\".\n",
 732                  inc_filename, missing_extern_C_count);
 733 #endif
 734     }
 735 }
 736
 737 static void
 738 write_rbrac ()
 739 {
 740   struct fn_decl *fn;
 741   const char *cptr;
 742   register struct symbol_list *cur_symbols;
 743
 744   if (required_unseen_count)
 745     {
 746 #ifdef NO_IMPLICIT_EXTERN_C
 747       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
 748 #endif
 749     }
 750
 751   /* Now we print out prototypes for those functions that we haven't seen.  */
 752   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
 753     {
 754       int if_was_emitted = 0;
 755       int name_len;
 756       cptr = cur_symbols->names;
 757       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
 758         {
 759           int macro_protect = 0;
 760
 761           if (cur_symbols->flags & MACRO_SYMBOL)
 762             continue;
 763
 764           fn = lookup_std_proto (cptr, name_len);
 765           if (fn == NULL || !REQUIRED (fn))
 766             continue;
 767
 768           if (!if_was_emitted)
 769             {
 770 /*            what about curses. ??? or _flsbuf/_filbuf ??? */
 771               if (cur_symbols->flags & ANSI_SYMBOL)
 772                 fprintf (outf,
 773          "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
 774               else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
 775                 fprintf (outf,
 776        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
 777     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
 778     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
 779               else if (cur_symbols->flags & XOPEN_SYMBOL)
 780                 {
 781                 fprintf (outf,
 782        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 783    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
 784                 }
 785               else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
 786                 {
 787                 fprintf (outf,
 788        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
 789    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
 790                 }
 791               else
 792                 {
 793                   fatal ("internal error for function %s", fn->fname);
 794                 }
 795               if_was_emitted = 1;
 796             }
 797
 798           /* In the case of memmove, protect in case the application
 799              defines it as a macro before including the header.  */
 800           if (!strcmp (fn->fname, "memmove")
 801               || !strcmp (fn->fname, "vprintf")
 802               || !strcmp (fn->fname, "vfprintf")
 803               || !strcmp (fn->fname, "vsprintf")
 804               || !strcmp (fn->fname, "rewinddir")
 805               || !strcmp (fn->fname, "abort"))
 806             macro_protect = 1;
 807
 808           if (macro_protect)
 809             fprintf (outf, "#ifndef %s\n", fn->fname);
 810           fprintf (outf, "extern %s %s (%s);\n",
 811                    fn->rtype, fn->fname, fn->params);
 812           if (macro_protect)
 813             fprintf (outf, "#endif\n");
 814         }
 815       if (if_was_emitted)
 816         fprintf (outf,
 817                  "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
 818     }
 819   if (required_unseen_count)
 820     {
 821 #ifdef NO_IMPLICIT_EXTERN_C
 822       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 823 #endif
 824     }
 825
 826   switch (special_file_handling)
 827     {
 828     case errno_h:
 829       if (!seen_errno)
 830         fprintf (outf, "extern int errno;\n");
 831       break;
 832     case stdlib_h:
 833       if (!seen_EXIT_FAILURE)
 834         fprintf (outf, "#define EXIT_FAILURE 1\n");
 835       if (!seen_EXIT_SUCCESS)
 836         fprintf (outf, "#define EXIT_SUCCESS 0\n");
 837       break;
 838     case sys_stat_h:
 839       if (!seen_S_ISBLK && seen_S_IFBLK)
 840         fprintf (outf,
 841                  "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
 842       if (!seen_S_ISCHR && seen_S_IFCHR)
 843         fprintf (outf,
 844                  "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
 845       if (!seen_S_ISDIR && seen_S_IFDIR)
 846         fprintf (outf,
 847                  "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
 848       if (!seen_S_ISFIFO && seen_S_IFIFO)
 849         fprintf (outf,
 850                  "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
 851       if (!seen_S_ISLNK && seen_S_IFLNK)
 852         fprintf (outf,
 853                  "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
 854       if (!seen_S_ISREG && seen_S_IFREG)
 855         fprintf (outf,
 856                  "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
 857       break;
 858
 859     default:
 860       break;
 861     }
 862
 863
 864 #if ADD_MISSING_EXTERN_C
 865   if (missing_extern_C_count + required_unseen_count > 0)
 866     fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
 867 #endif
 868 }
 869
 870 /* Returns 1 iff the file is properly protected from multiple inclusion:
 871    #ifndef PROTECT_NAME
 872    #define PROTECT_NAME
 873    #endif
 874
 875  */
 876
 877 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
 878 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 879
 880 static int
 881 inf_skip_spaces (c)
 882      int c;
 883 {
 884   for (;;)
 885     {
 886       if (c == ' ' || c == '\t')
 887         c = INF_GET ();
 888       else if (c == '/')
 889         {
 890           c = INF_GET ();
 891           if (c != '*')
 892             {
 893               (void) INF_UNGET (c);
 894               return '/';
 895             }
 896           c = INF_GET ();
 897           for (;;)
 898             {
 899               if (c == EOF)
 900                 return EOF;
 901               else if (c != '*')
 902                 {
 903                   if (c == '\n')
 904                     source_lineno++, lineno++;
 905                   c = INF_GET ();
 906                 }
 907               else if ((c = INF_GET ()) == '/')
 908                 return INF_GET ();
 909             }
 910         }
 911       else
 912         break;
 913     }
 914   return c;
 915 }
 916
 917 /* Read into STR from inf_buffer upto DELIM.  */
 918
 919 static int
 920 inf_read_upto (str, delim)
 921      sstring *str;
 922      int delim;
 923 {
 924   int ch;
 925   for (;;)
 926     {
 927       ch = INF_GET ();
 928       if (ch == EOF || ch == delim)
 929         break;
 930       SSTRING_PUT (str, ch);
 931     }
 932   MAKE_SSTRING_SPACE (str, 1);
 933   *str->ptr = 0;
 934   return ch;
 935 }
 936
 937 static int
 938 inf_scan_ident (s, c)
 939      register sstring *s;
 940      int c;
 941 {
 942   s->ptr = s->base;
 943   if (ISALPHA (c) || c == '_')
 944     {
 945       for (;;)
 946         {
 947           SSTRING_PUT (s, c);
 948           c = INF_GET ();
 949           if (c == EOF || !(ISALNUM (c) || c == '_'))
 950             break;
 951         }
 952     }
 953   MAKE_SSTRING_SPACE (s, 1);
 954   *s->ptr = 0;
 955   return c;
 956 }
 957
 958 /* Returns 1 if the file is correctly protected against multiple
 959    inclusion, setting *ifndef_line to the line number of the initial #ifndef
 960    and setting *endif_line to the final #endif.
 961    Otherwise return 0.  */
 962
 963 static int
 964 check_protection (ifndef_line, endif_line)
 965      int *ifndef_line, *endif_line;
 966 {
 967   int c;
 968   int if_nesting = 1; /* Level of nesting of #if's */
 969   char *protect_name = NULL; /* Identifier following initial #ifndef */
 970   int define_seen = 0;
 971
 972   /* Skip initial white space (including comments).  */
 973   for (;; lineno++)
 974     {
 975       c = inf_skip_spaces (' ');
 976       if (c == EOF)
 977         return 0;
 978       if (c != '\n')
 979         break;
 980     }
 981   if (c != '#')
 982     return 0;
 983   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
 984   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
 985     return 0;
 986
 987   /* So far so good: We've seen an initial #ifndef.  */
 988   *ifndef_line = lineno;
 989   c = inf_scan_ident (&buf, inf_skip_spaces (c));
 990   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
 991     return 0;
 992   protect_name = xstrdup (buf.base);
 993
 994   (void) INF_UNGET (c);
 995   c = inf_read_upto (&buf, '\n');
 996   if (c == EOF)
 997     return 0;
 998   lineno++;
 999
1000   for (;;)
1001     {
1002       c = inf_skip_spaces (' ');
1003       if (c == EOF)
1004         return 0;
1005       if (c == '\n')
1006         {
1007           lineno++;
1008           continue;
1009         }
1010       if (c != '#')
1011         goto skip_to_eol;
1012       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1013       if (SSTRING_LENGTH (&buf) == 0)
1014         ;
1015       else if (!strcmp (buf.base, "ifndef")
1016           || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1017         {
1018           if_nesting++;
1019         }
1020       else if (!strcmp (buf.base, "endif"))
1021         {
1022           if_nesting--;
1023           if (if_nesting == 0)
1024             break;
1025         }
1026       else if (!strcmp (buf.base, "else"))
1027         {
1028           if (if_nesting == 1)
1029             return 0;
1030         }
1031       else if (!strcmp (buf.base, "define"))
1032         {
1033           if (if_nesting != 1)
1034             goto skip_to_eol;
1035           c = inf_skip_spaces (c);
1036           c = inf_scan_ident (&buf, c);
1037           if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1038             define_seen = 1;
1039         }
1040     skip_to_eol:
1041       for (;;)
1042         {
1043           if (c == '\n' || c == EOF)
1044             break;
1045           c = INF_GET ();
1046         }
1047       if (c == EOF)
1048         return 0;
1049       lineno++;
1050     }
1051
1052   if (!define_seen)
1053      return 0;
1054   *endif_line = lineno;
1055   /* Skip final white space (including comments).  */
1056   for (;;)
1057     {
1058       c = inf_skip_spaces (' ');
1059       if (c == EOF)
1060         break;
1061       if (c != '\n')
1062         return 0;
1063     }
1064
1065   return 1;
1066 }
1067
1068 extern int main                 PARAMS ((int, char **));
1069
1070 int
1071 main (argc, argv)
1072      int argc;
1073      char **argv;
1074 {
1075   int inf_fd;
1076   struct stat sbuf;
1077   int c;
1078 #ifdef FIXPROTO_IGNORE_LIST
1079   int i;
1080 #endif
1081   const char *cptr;
1082   int ifndef_line;
1083   int endif_line;
1084   long to_read;
1085   long int inf_size;
1086   register struct symbol_list *cur_symbols;
1087
1088   if (argv[0] && argv[0][0])
1089     {
1090       register char *p;
1091
1092       progname = 0;
1093       for (p = argv[0]; *p; p++)
1094         if (*p == '/')
1095           progname = p;
1096       progname = progname ? progname+1 : argv[0];
1097     }
1098
1099   if (argc < 4)
1100     {
1101       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1102                progname);
1103       exit (FATAL_EXIT_CODE);
1104     }
1105
1106   inc_filename = argv[1];
1107   inc_filename_length = strlen (inc_filename);
1108
1109 #ifdef FIXPROTO_IGNORE_LIST
1110   for (i = 0; files_to_ignore[i] != NULL; i++)
1111     {
1112       char *ignore_name = files_to_ignore[i];
1113       int ignore_len = strlen (ignore_name);
1114       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1115         {
1116           if (ignore_name[ignore_len-1] == '/'
1117               || inc_filename[ignore_len] == '\0')
1118             {
1119               if (verbose)
1120                 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1121               exit (SUCCESS_EXIT_CODE);
1122             }
1123         }
1124
1125     }
1126 #endif
1127
1128   if (strcmp (inc_filename, "sys/stat.h") == 0)
1129     special_file_handling = sys_stat_h;
1130   else if (strcmp (inc_filename, "errno.h") == 0)
1131     special_file_handling = errno_h, required_other++;
1132   else if (strcmp (inc_filename, "stdlib.h") == 0)
1133     special_file_handling = stdlib_h, required_other+=2;
1134   else if (strcmp (inc_filename, "stdio.h") == 0)
1135     special_file_handling = stdio_h;
1136   include_entry = std_include_table;
1137   while (include_entry->name != NULL
1138          && ((strcmp (include_entry->name, CONTINUED) == 0)
1139              || strcmp (inc_filename, include_entry->name) != 0))
1140     include_entry++;
1141
1142   if (include_entry->name != NULL)
1143     {
1144       struct std_include_entry *entry;
1145       cur_symbol_table_size = 0;
1146       for (entry = include_entry; ;)
1147         {
1148           if (entry->flags)
1149             add_symbols (entry->flags, entry->names);
1150           entry++;
1151           if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1152             break;
1153         }
1154     }
1155   else
1156     symbol_table[0].names = NULL;
1157
1158   /* Count and mark the prototypes required for this include file.  */
1159   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1160     {
1161       int name_len;
1162       if (cur_symbols->flags & MACRO_SYMBOL)
1163         continue;
1164       cptr = cur_symbols->names;
1165       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1166         {
1167           struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1168           required_unseen_count++;
1169           if (fn == NULL)
1170             fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
1171           else
1172             SET_REQUIRED (fn);
1173         }
1174     }
1175
1176   read_scan_file (argv[2], argc - 4, argv + 4);
1177
1178   inf_fd = open (argv[2], O_RDONLY, 0666);
1179   if (inf_fd < 0)
1180     {
1181       fprintf (stderr, "%s: Cannot open '%s' for reading -",
1182                progname, argv[2]);
1183       perror (NULL);
1184       exit (FATAL_EXIT_CODE);
1185     }
1186   if (fstat (inf_fd, &sbuf) < 0)
1187     {
1188       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1189       perror (NULL);
1190       exit (FATAL_EXIT_CODE);
1191     }
1192   inf_size = sbuf.st_size;
1193   inf_buffer = (char *) xmalloc (inf_size + 2);
1194   inf_buffer[inf_size] = '\n';
1195   inf_buffer[inf_size + 1] = '\0';
1196   inf_limit = inf_buffer + inf_size;
1197   inf_ptr = inf_buffer;
1198
1199   to_read = inf_size;
1200   while (to_read > 0)
1201     {
1202       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1203       if (i < 0)
1204         {
1205           fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1206           perror (NULL);
1207           exit (FATAL_EXIT_CODE);
1208         }
1209       if (i == 0)
1210         {
1211           inf_size -= to_read;
1212           break;
1213         }
1214       to_read -= i;
1215     }
1216
1217   close (inf_fd);
1218
1219   /* If file doesn't end with '\n', add one.  */
1220   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1221     inf_limit++;
1222
1223   unlink (argv[3]);
1224   outf = fopen (argv[3], "w");
1225   if (outf == NULL)
1226     {
1227       fprintf (stderr, "%s: Cannot open '%s' for writing -",
1228                progname, argv[3]);
1229       perror (NULL);
1230       exit (FATAL_EXIT_CODE);
1231     }
1232
1233   lineno = 1;
1234
1235   if (check_protection (&ifndef_line, &endif_line))
1236     {
1237       lbrac_line = ifndef_line+1;
1238       rbrac_line = endif_line;
1239     }
1240   else
1241     {
1242       lbrac_line = 1;
1243       rbrac_line = -1;
1244     }
1245
1246   /* Reset input file.  */
1247   inf_ptr = inf_buffer;
1248   lineno = 1;
1249
1250   for (;;)
1251     {
1252       if (lineno == lbrac_line)
1253         write_lbrac ();
1254       if (lineno == rbrac_line)
1255         write_rbrac ();
1256       for (;;)
1257         {
1258           struct fn_decl *fn;
1259           c = INF_GET ();
1260           if (c == EOF)
1261             break;
1262           if (ISALPHA (c) || c == '_')
1263             {
1264               c = inf_scan_ident (&buf, c);
1265               (void) INF_UNGET (c);
1266               fputs (buf.base, outf);
1267               fn = lookup_std_proto (buf.base, strlen (buf.base));
1268               /* We only want to edit the declaration matching the one
1269                  seen by scan-decls, as there can be multiple
1270                  declarations, selected by #ifdef __STDC__ or whatever.  */
1271               if (fn && fn->partial && fn->partial->line_seen == lineno)
1272                 {
1273                   c = inf_skip_spaces (' ');
1274                   if (c == EOF)
1275                     break;
1276                   if (c == '(')
1277                     {
1278                       c = inf_skip_spaces (' ');
1279                       if (c == ')')
1280                         {
1281                           fprintf (outf, " _PARAMS((%s))", fn->params);
1282                         }
1283                       else
1284                         {
1285                           putc ('(', outf);
1286                           (void) INF_UNGET (c);
1287                         }
1288                     }
1289                   else
1290                     fprintf (outf, " %c", c);
1291                 }
1292             }
1293           else
1294             {
1295               putc (c, outf);
1296               if (c == '\n')
1297                 break;
1298             }
1299         }
1300       if (c == EOF)
1301         break;
1302       lineno++;
1303     }
1304   if (rbrac_line < 0)
1305     write_rbrac ();
1306
1307   fclose (outf);
1308
1309   return 0;
1310 }
1311 \f
1312
1313 static void
1314 v_fatal (str, ap)
1315   const char * str;
1316   va_list ap;
1317 {
1318   fprintf (stderr, "%s: %s: ", progname, inc_filename);
1319   vfprintf (stderr, str, ap);
1320   fprintf (stderr, "\n");
1321
1322   exit (FATAL_EXIT_CODE);
1323 }
1324
1325 static void
1326 fatal VPARAMS ((const char *str, ...))
1327 {
1328 #ifndef ANSI_PROTOTYPES
1329   const char *str;
1330 #endif
1331   va_list ap;
1332
1333   VA_START(ap, str);
1334
1335 #ifndef ANSI_PROTOTYPES
1336   str = va_arg (ap, const char *);
1337 #endif
1338
1339   v_fatal(str, ap);
1340   va_end(ap);
1341 }