Open64: osprey-gcc/gcc/fix-header.c Source File

00001 /* fix-header.c - Make C header file suitable for C++.
00002    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998,
00003    1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
00004 
00005 This program is free software; you can redistribute it and/or modify it
00006 under the terms of the GNU General Public License as published by the
00007 Free Software Foundation; either version 2, or (at your option) any
00008 later version.
00009 
00010 This program is distributed in the hope that it will be useful,
00011 but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 GNU General Public License for more details.
00014 
00015 You should have received a copy of the GNU General Public License
00016 along with this program; if not, write to the Free Software
00017 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
00018 
00019 /* This program massages a system include file (such as stdio.h),
00020    into a form that is compatible with GNU C and GNU C++.
00021 
00022    * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
00023    if they seem to be needed.  These prevent C++ compilers from name
00024    mangling the functions inside the braces.
00025 
00026    * If an old-style incomplete function declaration is seen (without
00027    an argument list), and it is a "standard" function listed in
00028    the file sys-protos.h (and with a non-empty argument list), then
00029    the declaration is converted to a complete prototype by replacing
00030    the empty parameter list with the argument list from sys-protos.h.
00031 
00032    * The program can be given a list of (names of) required standard
00033    functions (such as fclose for stdio.h).  If a required function
00034    is not seen in the input, then a prototype for it will be
00035    written to the output.
00036 
00037    * If all of the non-comment code of the original file is protected
00038    against multiple inclusion:
00039   #ifndef FOO
00040   #define FOO
00041   <body of include file>
00042   #endif
00043    then extra matter added to the include file is placed inside the <body>.
00044 
00045    * If the input file is OK (nothing needs to be done);
00046    the output file is not written (nor removed if it exists).
00047 
00048    There are also some special actions that are done for certain
00049    well-known standard include files:
00050 
00051    * If argv[1] is "sys/stat.h", the Posix.1 macros
00052    S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
00053    they were missing, and the corresponding "traditional" S_IFxxx
00054    macros were defined.
00055 
00056    * If argv[1] is "errno.h", errno is declared if it was missing.
00057 
00058    * TODO:  The input file should be read complete into memory, because:
00059    a) it needs to be scanned twice anyway, and
00060    b) it would be nice to allow update in place.
00061 
00062    Usage:
00063   fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
00064    where:
00065    * FOO.H is the relative file name of the include file,
00066    as it would be #include'd by a C file.  (E.g. stdio.h)
00067    * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
00068    * OUTFILE.H is the full pathname for where to write the output file,
00069    if anything needs to be done.  (e.g. ./include/stdio.h)
00070    * OPTIONS can be -D or -I switches as you would pass to cpp.
00071 
00072    Written by Per Bothner <bothner@cygnus.com>, July 1993.  */
00073 
00074 #include "bconfig.h"
00075 #include "system.h"
00076 #include "coretypes.h"
00077 #include "tm.h"
00078 #include "obstack.h"
00079 #include "scan.h"
00080 #include "cpplib.h"
00081 #include "c-incpath.h"
00082 #include "errors.h"
00083 
00084 #ifdef TARGET_EXTRA_INCLUDES
00085 void TARGET_EXTRA_INCLUDES (const char *sysroot ATTRIBUTE_UNUSED,
00086           const char *iprefix ATTRIBUTE_UNUSED,
00087           int stdinc ATTRIBUTE_UNUSED)
00088 {
00089 }
00090 #endif
00091 
00092 #ifdef TARGET_EXTRA_PRE_INCLUDES 
00093 void TARGET_EXTRA_PRE_INCLUDES (const char *sysroot ATTRIBUTE_UNUSED,
00094           const char *iprefix ATTRIBUTE_UNUSED,
00095           int stdinc ATTRIBUTE_UNUSED)
00096 {
00097 }
00098 #endif
00099 
00100 struct line_maps line_table;
00101 
00102 sstring buf;
00103 
00104 int verbose = 0;
00105 int partial_count = 0;
00106 int warnings = 0;
00107 
00108 #if ADD_MISSING_EXTERN_C
00109 int missing_extern_C_count = 0;
00110 #endif
00111 
00112 #include "xsys-protos.h"
00113 
00114 #ifdef FIXPROTO_IGNORE_LIST
00115 /* This is a currently unused feature.  */
00116 
00117 /* List of files and directories to ignore.
00118    A directory name (ending in '/') means ignore anything in that
00119    directory.  (It might be more efficient to do directory pruning
00120    earlier in fixproto, but this is simpler and easier to customize.) */
00121 
00122 static const char *const files_to_ignore[] = {
00123   "X11/",
00124   FIXPROTO_IGNORE_LIST
00125   0
00126 };
00127 #endif
00128 
00129 char *inf_buffer;
00130 char *inf_limit;
00131 char *inf_ptr;
00132 static const char *cur_file;
00133 
00134 /* Certain standard files get extra treatment */
00135 
00136 enum special_file
00137 {
00138   no_special,
00139 #ifdef errno_h
00140 #undef errno_h
00141 #endif
00142   errno_h,
00143 #ifdef stdio_h
00144 #undef stdio_h
00145 #endif
00146   stdio_h,
00147 #ifdef stdlib_h
00148 #undef stdlib_h
00149 #endif
00150   stdlib_h,
00151 #ifdef sys_stat_h
00152 #undef sys_stat_h
00153 #endif
00154   sys_stat_h
00155 };
00156 
00157 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
00158    by an empty name (i.e. by "\0\0").  */
00159 
00160 typedef const char *namelist;
00161 
00162 /* The following macros provide the bits for symbol_flags.  */
00163 typedef int symbol_flags;
00164 
00165 /* Used to mark names defined in the ANSI/ISO C standard.  */
00166 #define ANSI_SYMBOL 1
00167 
00168 /* We no longer massage include files for POSIX or XOPEN symbols,
00169    as there are now several versions of the POSIX and XOPEN standards,
00170    and it would be a maintenance nightmare for us to track them all.
00171    Better to be compatible with the system include files.  */
00172 /*#define ADD_MISSING_POSIX 1 */
00173 /*#define ADD_MISSING_XOPEN 1 */
00174 
00175 #if ADD_MISSING_POSIX
00176 /* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
00177 #define POSIX1_SYMBOL 2
00178 #define POSIX2_SYMBOL 4
00179 #else
00180 #define POSIX1_SYMBOL 0
00181 #define POSIX2_SYMBOL 0
00182 #endif
00183 
00184 #if ADD_MISSING_XOPEN
00185 /* Used to mark names defined in X/Open Portability Guide.  */
00186 #define XOPEN_SYMBOL 8
00187 /* Used to mark names defined in X/Open UNIX Extensions.  */
00188 #define XOPEN_EXTENDED_SYMBOL 16
00189 #else
00190 #define XOPEN_SYMBOL 0
00191 #define XOPEN_EXTENDED_SYMBOL 0
00192 #endif
00193 
00194 /* Used to indicate names that are not functions */
00195 #define MACRO_SYMBOL 512
00196 
00197 struct symbol_list {
00198   symbol_flags flags;
00199   namelist names;
00200 };
00201 
00202 #define SYMBOL_TABLE_SIZE 10
00203 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
00204 int cur_symbol_table_size;
00205 
00206 static void add_symbols (symbol_flags, namelist);
00207 static struct fn_decl *lookup_std_proto (const char *, int);
00208 static void write_lbrac (void);
00209 static void recognized_macro (const char *);
00210 static void check_macro_names (cpp_reader *, namelist);
00211 static void read_scan_file (char *, int, char **);
00212 static void write_rbrac (void);
00213 static int inf_skip_spaces (int);
00214 static int inf_read_upto (sstring *, int);
00215 static int inf_scan_ident (sstring *, int);
00216 static int check_protection (int *, int *);
00217 static void cb_file_change (cpp_reader *, const struct line_map *);
00218 
00219 static void
00220 add_symbols (symbol_flags flags, namelist names)
00221 {
00222   symbol_table[cur_symbol_table_size].flags = flags;
00223   symbol_table[cur_symbol_table_size].names = names;
00224   cur_symbol_table_size++;
00225   if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
00226     fatal ("too many calls to add_symbols");
00227   symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
00228 }
00229 
00230 struct std_include_entry {
00231   const char *const name;
00232   const symbol_flags flags;
00233   const namelist names;
00234 };
00235 
00236 const char NONE[] = "";  /* The empty namelist.  */
00237 
00238 /* Special name to indicate a continuation line in std_include_table.  */
00239 const char CONTINUED[] = "";
00240 
00241 const struct std_include_entry *include_entry;
00242 
00243 const struct std_include_entry std_include_table [] = {
00244   { "ctype.h", ANSI_SYMBOL,
00245       "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
00246 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
00247 
00248   { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
00249 
00250   { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
00251 
00252   /* ANSI_SYMBOL is wrong, but ...  */
00253   { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
00254 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
00255 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
00256 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
00257 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
00258 
00259   { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
00260 
00261   /* Maybe also "getgrent fgetgrent setgrent endgrent" */
00262   { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
00263 
00264 /*{ "limit.h", ... provided by gcc }, */
00265 
00266   { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
00267 
00268   { "math.h", ANSI_SYMBOL,
00269       "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
00270 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
00271 tan\0tanh\0" },
00272 
00273   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
00274 
00275   { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
00276 
00277   /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
00278   { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
00279 
00280   /* Left out signal() - its prototype is too complex for us!
00281      Also left out "sigaction sigaddset sigdelset sigemptyset
00282      sigfillset sigismember sigpending sigprocmask sigsuspend"
00283      because these need sigset_t or struct sigaction.
00284      Most systems that provide them will also declare them.  */
00285   { "signal.h", ANSI_SYMBOL, "raise\0" },
00286   { CONTINUED, POSIX1_SYMBOL, "kill\0" },
00287 
00288   { "stdio.h", ANSI_SYMBOL,
00289       "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
00290 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
00291 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
00292 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
00293 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
00294 tmpnam\0ungetc\0" },
00295   { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
00296   { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
00297 /* Should perhaps also handle NULL, EOF, ... ? */
00298 
00299   /* "div ldiv", - ignored because these depend on div_t, ldiv_t
00300      ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
00301      Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
00302      Should perhaps also add NULL */
00303   { "stdlib.h", ANSI_SYMBOL,
00304       "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
00305 exit\0free\0getenv\0labs\0malloc\0qsort\0rand\0realloc\0\
00306 srand\0strtod\0strtol\0strtoul\0system\0" },
00307   { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
00308   { CONTINUED, POSIX1_SYMBOL, "putenv\0" },
00309 
00310   { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
00311 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
00312 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
00313 strtok\0strxfrm\0" },
00314 /* Should perhaps also add NULL and size_t */
00315 
00316   { "strings.h", XOPEN_EXTENDED_SYMBOL,
00317       "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
00318 
00319   { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
00320 
00321   /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
00322      ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
00323      and many systems do have <sys/ioctl.h> but not <strops.h>.  */
00324   { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
00325 
00326   { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
00327 
00328   { "sys/stat.h", POSIX1_SYMBOL,
00329       "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
00330   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
00331       "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
00332 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
00333   { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
00334 
00335 #if 0
00336 /* How do we handle fd_set? */
00337   { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
00338   { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
00339 #endif
00340 
00341   { "sys/times.h", POSIX1_SYMBOL, "times\0" },
00342   /* "sys/types.h" add types (not in old g++-include) */
00343 
00344   { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
00345 
00346   { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
00347   { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
00348       "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
00349 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
00350 
00351   { "tar.h", POSIX1_SYMBOL, NONE },
00352 
00353   { "termios.h", POSIX1_SYMBOL,
00354       "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
00355 
00356   { "time.h", ANSI_SYMBOL,
00357       "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0" },
00358   { CONTINUED, POSIX1_SYMBOL, "tzset\0" },
00359 
00360   { "unistd.h", POSIX1_SYMBOL,
00361       "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
00362 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
00363 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
00364 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
00365 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
00366 ttyname\0unlink\0write\0" },
00367   { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
00368   { CONTINUED, XOPEN_EXTENDED_SYMBOL,
00369       "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
00370 
00371   { "utime.h", POSIX1_SYMBOL, "utime\0" },
00372 
00373   { NULL, 0, NONE }
00374 };
00375 
00376 enum special_file special_file_handling = no_special;
00377 
00378 /* They are set if the corresponding macro has been seen.  */
00379 /* The following are only used when handling sys/stat.h */
00380 int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
00381 int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
00382 int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
00383 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
00384 int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
00385 int seen_S_IFREG = 0, seen_S_ISREG  = 0;
00386 /* The following are only used when handling errno.h */
00387 int seen_errno = 0;
00388 /* The following are only used when handling stdlib.h */
00389 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
00390 
00391 struct obstack scan_file_obstack;
00392 
00393 /* NOTE:  If you edit this, also edit gen-protos.c !! */
00394 
00395 static struct fn_decl *
00396 lookup_std_proto (const char *name, int name_length)
00397 {
00398   int i = hashstr (name, name_length) % HASH_SIZE;
00399   int i0 = i;
00400   for (;;)
00401     {
00402       struct fn_decl *fn;
00403       if (hash_tab[i] == 0)
00404   return NULL;
00405       fn = &std_protos[hash_tab[i]];
00406       if ((int) strlen (fn->fname) == name_length
00407     && strncmp (fn->fname, name, name_length) == 0)
00408   return fn;
00409       i = (i+1) % HASH_SIZE;
00410       gcc_assert (i != i0);
00411     }
00412 }
00413 
00414 char *inc_filename;
00415 int inc_filename_length;
00416 FILE *outf;
00417 sstring line;
00418 
00419 int lbrac_line, rbrac_line;
00420 
00421 int required_unseen_count = 0;
00422 int required_other = 0;
00423 
00424 static void
00425 write_lbrac (void)
00426 {
00427   if (partial_count)
00428     {
00429       fprintf (outf, "#ifndef _PARAMS\n");
00430       fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
00431       fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
00432       fprintf (outf, "#else\n");
00433       fprintf (outf, "#define _PARAMS(ARGS) ()\n");
00434       fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
00435     }
00436 }
00437 
00438 struct partial_proto
00439 {
00440   struct partial_proto *next;
00441   struct fn_decl *fn;
00442   int line_seen;
00443 };
00444 
00445 struct partial_proto *partial_proto_list = NULL;
00446 
00447 struct partial_proto required_dummy_proto, seen_dummy_proto;
00448 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
00449 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
00450 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
00451 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
00452 
00453 static void
00454 recognized_macro (const char *fname)
00455 {
00456   /* The original include file defines fname as a macro.  */
00457   struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
00458 
00459   /* Since fname is a macro, don't require a prototype for it.  */
00460   if (fn)
00461     {
00462       if (REQUIRED (fn))
00463   required_unseen_count--;
00464       SET_SEEN (fn);
00465     }
00466 
00467   switch (special_file_handling)
00468     {
00469     case errno_h:
00470       if (strcmp (fname, "errno") == 0 && !seen_errno)
00471   seen_errno = 1, required_other--;
00472       break;
00473     case stdlib_h:
00474       if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
00475   seen_EXIT_FAILURE = 1, required_other--;
00476       if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
00477   seen_EXIT_SUCCESS = 1, required_other--;
00478       break;
00479     case sys_stat_h:
00480       if (fname[0] == 'S' && fname[1] == '_')
00481   {
00482     if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
00483     else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
00484     else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
00485     else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
00486     else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
00487     else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
00488     else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
00489     else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
00490     else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
00491     else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
00492     else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
00493     else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
00494   }
00495       break;
00496 
00497     default:
00498       break;
00499     }
00500 }
00501 
00502 void
00503 recognized_extern (const cpp_token *name)
00504 {
00505   switch (special_file_handling)
00506     {
00507     case errno_h:
00508       if (cpp_ideq (name, "errno"))
00509   seen_errno = 1, required_other--;
00510       break;
00511 
00512     default:
00513       break;
00514     }
00515 }
00516 
00517 /* Called by scan_decls if it saw a function definition for a function
00518    named FNAME.  KIND is 'I' for an inline function; 'F' if a normal
00519    function declaration preceded by 'extern "C"' (or nested inside
00520    'extern "C"' braces); or 'f' for other function declarations.  */
00521 
00522 void
00523 recognized_function (const cpp_token *fname, unsigned int line, int kind,
00524          int have_arg_list)
00525 {
00526   struct partial_proto *partial;
00527   int i;
00528   struct fn_decl *fn;
00529 
00530   fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
00531        NODE_LEN (fname->val.node));
00532 
00533   /* Remove the function from the list of required function.  */
00534   if (fn)
00535     {
00536       if (REQUIRED (fn))
00537   required_unseen_count--;
00538       SET_SEEN (fn);
00539     }
00540 
00541   /* If we have a full prototype, we're done.  */
00542   if (have_arg_list)
00543     return;
00544 
00545   if (kind == 'I')  /* don't edit inline function */
00546     return;
00547 
00548   /* If the partial prototype was included from some other file,
00549      we don't need to patch it up (in this run).  */
00550   i = strlen (cur_file);
00551   if (i < inc_filename_length
00552       || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
00553     return;
00554 
00555   if (fn == NULL)
00556     return;
00557   if (fn->params[0] == '\0')
00558     return;
00559 
00560   /* We only have a partial function declaration,
00561      so remember that we have to add a complete prototype.  */
00562   partial_count++;
00563   partial = obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
00564   partial->line_seen = line;
00565   partial->fn = fn;
00566   fn->partial = partial;
00567   partial->next = partial_proto_list;
00568   partial_proto_list = partial;
00569   if (verbose)
00570     {
00571       fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
00572          inc_filename, fn->fname);
00573     }
00574 }
00575 
00576 /* For any name in NAMES that is defined as a macro,
00577    call recognized_macro on it.  */
00578 
00579 static void
00580 check_macro_names (cpp_reader *pfile, namelist names)
00581 {
00582   size_t len;
00583   while (*names)
00584     {
00585       len = strlen (names);
00586       if (cpp_defined (pfile, (const unsigned char *)names, len))
00587   recognized_macro (names);
00588       names += len + 1;
00589     }
00590 }
00591 
00592 static void
00593 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
00594     const struct line_map *map)
00595 {
00596   /* Just keep track of current file name.  */
00597   cur_file = map == NULL ? NULL : map->to_file;
00598 }
00599 
00600 static void
00601 read_scan_file (char *in_fname, int argc, char **argv)
00602 {
00603   cpp_reader *scan_in;
00604   cpp_callbacks *cb;
00605   cpp_options *options;
00606   struct fn_decl *fn;
00607   int i, strings_processed;
00608   struct symbol_list *cur_symbols;
00609 
00610   obstack_init (&scan_file_obstack);
00611 
00612   linemap_init (&line_table);
00613   scan_in = cpp_create_reader (CLK_GNUC89, NULL, &line_table);
00614   cb = cpp_get_callbacks (scan_in);
00615   cb->file_change = cb_file_change;
00616 
00617   /* We are going to be scanning a header file out of its proper context,
00618      so ignore warnings and errors.  */
00619   options = cpp_get_options (scan_in);
00620   options->inhibit_warnings = 1;
00621   options->inhibit_errors = 1;
00622   cpp_post_options (scan_in);
00623 
00624   if (!cpp_read_main_file (scan_in, in_fname))
00625     exit (FATAL_EXIT_CODE);
00626 
00627   cpp_change_file (scan_in, LC_RENAME, "<built-in>");
00628   cpp_init_builtins (scan_in, true);
00629   cpp_change_file (scan_in, LC_RENAME, in_fname);
00630 
00631   /* Process switches after builtins so -D can override them.  */
00632   for (i = 0; i < argc; i += strings_processed)
00633     {
00634       strings_processed = 0;
00635       if (argv[i][0] == '-')
00636   {
00637     if (argv[i][1] == 'I')
00638       {
00639         if (argv[i][2] != '\0')
00640     {
00641       strings_processed = 1;
00642       add_path (xstrdup (argv[i] + 2), BRACKET, false, false);
00643     }
00644         else if (i + 1 != argc)
00645     {
00646       strings_processed = 2;
00647       add_path (xstrdup (argv[i + 1]), BRACKET, false, false);
00648     }
00649       }
00650     else if (argv[i][1] == 'D')
00651       {
00652         if (argv[i][2] != '\0')
00653     strings_processed = 1, cpp_define (scan_in, argv[i] + 2);
00654         else if (i + 1 != argc)
00655     strings_processed = 2, cpp_define (scan_in, argv[i + 1]);
00656       }
00657   }
00658 
00659       if (strings_processed == 0)
00660   break;
00661     }
00662 
00663   if (i < argc)
00664     cpp_error (scan_in, CPP_DL_ERROR, "invalid option `%s'", argv[i]);
00665   if (cpp_errors (scan_in))
00666     exit (FATAL_EXIT_CODE);
00667 
00668   register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
00669          true /* stdinc */, false /* cxx_stdinc */,
00670          false /* verbose */);
00671 
00672   /* We are scanning a system header, so mark it as such.  */
00673   cpp_make_system_header (scan_in, 1, 0);
00674 
00675   scan_decls (scan_in, argc, argv);
00676   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
00677     check_macro_names (scan_in, cur_symbols->names);
00678 
00679   /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
00680      If so, those functions are also required.  */
00681   if (special_file_handling == stdio_h
00682       && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
00683     {
00684       unsigned char getchar_call[] = "getchar();\n";
00685       int seen_filbuf = 0;
00686 
00687       /* Scan the macro expansion of "getchar();".  */
00688       cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
00689            /* from_stage3 */ true);
00690       for (;;)
00691   {
00692     const cpp_token *t = cpp_get_token (scan_in);
00693 
00694     if (t->type == CPP_EOF)
00695       break;
00696     else if (cpp_ideq (t, "_filbuf"))
00697       seen_filbuf++;
00698   }
00699 
00700       if (seen_filbuf)
00701   {
00702     int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
00703     struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
00704     int need_flsbuf
00705       = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
00706 
00707     /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
00708     if (need_filbuf + need_flsbuf)
00709       {
00710         const char *new_list;
00711         if (need_filbuf)
00712     SET_REQUIRED (fn);
00713         if (need_flsbuf)
00714     SET_REQUIRED (flsbuf_fn);
00715         if (need_flsbuf && need_filbuf)
00716     new_list = "_filbuf\0_flsbuf\0";
00717         else if (need_flsbuf)
00718     new_list = "_flsbuf\0";
00719         else /* if (need_flsbuf) */
00720     new_list = "_filbuf\0";
00721         add_symbols (ANSI_SYMBOL, new_list);
00722         required_unseen_count += need_filbuf + need_flsbuf;
00723       }
00724   }
00725     }
00726 
00727   if (required_unseen_count + partial_count + required_other == 0)
00728     {
00729       if (verbose)
00730   fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
00731       exit (SUCCESS_EXIT_CODE);
00732     }
00733   if (!verbose)
00734     fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
00735   else
00736     {
00737       if (required_unseen_count)
00738   fprintf (stderr, "%s: %d missing function declarations.\n",
00739      inc_filename, required_unseen_count);
00740       if (partial_count)
00741   fprintf (stderr, "%s: %d non-prototype function declarations.\n",
00742      inc_filename, partial_count);
00743     }
00744 }
00745 
00746 static void
00747 write_rbrac (void)
00748 {
00749   struct fn_decl *fn;
00750   const char *cptr;
00751   struct symbol_list *cur_symbols;
00752 
00753   if (required_unseen_count)
00754     {
00755 #ifdef NO_IMPLICIT_EXTERN_C
00756       fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
00757 #endif
00758     }
00759 
00760   /* Now we print out prototypes for those functions that we haven't seen.  */
00761   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
00762     {
00763       int if_was_emitted = 0;
00764       int name_len;
00765       cptr = cur_symbols->names;
00766       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
00767   {
00768     int macro_protect = 0;
00769 
00770     if (cur_symbols->flags & MACRO_SYMBOL)
00771       continue;
00772 
00773     fn = lookup_std_proto (cptr, name_len);
00774     if (fn == NULL || !REQUIRED (fn))
00775       continue;
00776 
00777     if (!if_was_emitted)
00778       {
00779 /*        what about curses. ??? or _flsbuf/_filbuf ??? */
00780         if (cur_symbols->flags & ANSI_SYMBOL)
00781     fprintf (outf,
00782    "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
00783         else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
00784     fprintf (outf,
00785        "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
00786     ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
00787     : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
00788         else if (cur_symbols->flags & XOPEN_SYMBOL)
00789     {
00790     fprintf (outf,
00791        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
00792    || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
00793     }
00794         else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
00795     {
00796     fprintf (outf,
00797        "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
00798    || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
00799     }
00800         else
00801     {
00802       fatal ("internal error for function %s", fn->fname);
00803     }
00804         if_was_emitted = 1;
00805       }
00806 
00807     /* In the case of memmove, protect in case the application
00808        defines it as a macro before including the header.  */
00809     if (!strcmp (fn->fname, "memmove")
00810         || !strcmp (fn->fname, "putc")
00811         || !strcmp (fn->fname, "getc")
00812         || !strcmp (fn->fname, "vprintf")
00813         || !strcmp (fn->fname, "vfprintf")
00814         || !strcmp (fn->fname, "vsprintf")
00815         || !strcmp (fn->fname, "rewinddir")
00816         || !strcmp (fn->fname, "abort"))
00817       macro_protect = 1;
00818 
00819     if (macro_protect)
00820       fprintf (outf, "#ifndef %s\n", fn->fname);
00821     fprintf (outf, "extern %s %s (%s);\n",
00822        fn->rtype, fn->fname, fn->params);
00823     if (macro_protect)
00824       fprintf (outf, "#endif\n");
00825   }
00826       if (if_was_emitted)
00827   fprintf (outf,
00828      "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
00829     }
00830   if (required_unseen_count)
00831     {
00832 #ifdef NO_IMPLICIT_EXTERN_C
00833       fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
00834 #endif
00835     }
00836 
00837   switch (special_file_handling)
00838     {
00839     case errno_h:
00840       if (!seen_errno)
00841   fprintf (outf, "extern int errno;\n");
00842       break;
00843     case stdlib_h:
00844       if (!seen_EXIT_FAILURE)
00845   fprintf (outf, "#define EXIT_FAILURE 1\n");
00846       if (!seen_EXIT_SUCCESS)
00847   fprintf (outf, "#define EXIT_SUCCESS 0\n");
00848       break;
00849     case sys_stat_h:
00850       if (!seen_S_ISBLK && seen_S_IFBLK)
00851   fprintf (outf,
00852      "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
00853       if (!seen_S_ISCHR && seen_S_IFCHR)
00854   fprintf (outf,
00855      "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
00856       if (!seen_S_ISDIR && seen_S_IFDIR)
00857   fprintf (outf,
00858      "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
00859       if (!seen_S_ISFIFO && seen_S_IFIFO)
00860   fprintf (outf,
00861      "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
00862       if (!seen_S_ISLNK && seen_S_IFLNK)
00863   fprintf (outf,
00864      "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
00865       if (!seen_S_ISREG && seen_S_IFREG)
00866   fprintf (outf,
00867      "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
00868       break;
00869 
00870     default:
00871       break;
00872     }
00873 
00874 }
00875 
00876 /* Returns 1 iff the file is properly protected from multiple inclusion:
00877    #ifndef PROTECT_NAME
00878    #define PROTECT_NAME
00879    #endif
00880 
00881  */
00882 
00883 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
00884 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
00885 
00886 static int
00887 inf_skip_spaces (int c)
00888 {
00889   for (;;)
00890     {
00891       if (c == ' ' || c == '\t')
00892   c = INF_GET ();
00893       else if (c == '/')
00894   {
00895     c = INF_GET ();
00896     if (c != '*')
00897       {
00898         (void) INF_UNGET (c);
00899         return '/';
00900       }
00901     c = INF_GET ();
00902     for (;;)
00903       {
00904         if (c == EOF)
00905     return EOF;
00906         else if (c != '*')
00907     {
00908       if (c == '\n')
00909         source_lineno++, lineno++;
00910       c = INF_GET ();
00911     }
00912         else if ((c = INF_GET ()) == '/')
00913     return INF_GET ();
00914       }
00915   }
00916       else
00917   break;
00918     }
00919   return c;
00920 }
00921 
00922 /* Read into STR from inf_buffer upto DELIM.  */
00923 
00924 static int
00925 inf_read_upto (sstring *str, int delim)
00926 {
00927   int ch;
00928   for (;;)
00929     {
00930       ch = INF_GET ();
00931       if (ch == EOF || ch == delim)
00932   break;
00933       SSTRING_PUT (str, ch);
00934     }
00935   MAKE_SSTRING_SPACE (str, 1);
00936   *str->ptr = 0;
00937   return ch;
00938 }
00939 
00940 static int
00941 inf_scan_ident (sstring *s, int c)
00942 {
00943   s->ptr = s->base;
00944   if (ISIDST (c))
00945     {
00946       for (;;)
00947   {
00948     SSTRING_PUT (s, c);
00949     c = INF_GET ();
00950     if (c == EOF || !(ISIDNUM (c)))
00951       break;
00952   }
00953     }
00954   MAKE_SSTRING_SPACE (s, 1);
00955   *s->ptr = 0;
00956   return c;
00957 }
00958 
00959 /* Returns 1 if the file is correctly protected against multiple
00960    inclusion, setting *ifndef_line to the line number of the initial #ifndef
00961    and setting *endif_line to the final #endif.
00962    Otherwise return 0.  */
00963 
00964 static int
00965 check_protection (int *ifndef_line, int *endif_line)
00966 {
00967   int c;
00968   int if_nesting = 1; /* Level of nesting of #if's */
00969   char *protect_name = NULL; /* Identifier following initial #ifndef */
00970   int define_seen = 0;
00971 
00972   /* Skip initial white space (including comments).  */
00973   for (;; lineno++)
00974     {
00975       c = inf_skip_spaces (' ');
00976       if (c == EOF)
00977   return 0;
00978       if (c != '\n')
00979   break;
00980     }
00981   if (c != '#')
00982     return 0;
00983   c = inf_scan_ident (&buf, inf_skip_spaces (' '));
00984   if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
00985     return 0;
00986 
00987   /* So far so good: We've seen an initial #ifndef.  */
00988   *ifndef_line = lineno;
00989   c = inf_scan_ident (&buf, inf_skip_spaces (c));
00990   if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
00991     return 0;
00992   protect_name = xstrdup (buf.base);
00993 
00994   (void) INF_UNGET (c);
00995   c = inf_read_upto (&buf, '\n');
00996   if (c == EOF)
00997     return 0;
00998   lineno++;
00999 
01000   for (;;)
01001     {
01002       c = inf_skip_spaces (' ');
01003       if (c == EOF)
01004   return 0;
01005       if (c == '\n')
01006   {
01007     lineno++;
01008     continue;
01009   }
01010       if (c != '#')
01011   goto skip_to_eol;
01012       c = inf_scan_ident (&buf, inf_skip_spaces (' '));
01013       if (SSTRING_LENGTH (&buf) == 0)
01014   ;
01015       else if (!strcmp (buf.base, "ifndef")
01016     || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
01017   {
01018     if_nesting++;
01019   }
01020       else if (!strcmp (buf.base, "endif"))
01021   {
01022     if_nesting--;
01023     if (if_nesting == 0)
01024       break;
01025   }
01026       else if (!strcmp (buf.base, "else"))
01027   {
01028     if (if_nesting == 1)
01029       return 0;
01030   }
01031       else if (!strcmp (buf.base, "define"))
01032   {
01033     c = inf_skip_spaces (c);
01034     c = inf_scan_ident (&buf, c);
01035     if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
01036       define_seen = 1;
01037   }
01038     skip_to_eol:
01039       for (;;)
01040   {
01041     if (c == '\n' || c == EOF)
01042       break;
01043     c = INF_GET ();
01044   }
01045       if (c == EOF)
01046   return 0;
01047       lineno++;
01048     }
01049 
01050   if (!define_seen)
01051      return 0;
01052   *endif_line = lineno;
01053   /* Skip final white space (including comments).  */
01054   for (;;)
01055     {
01056       c = inf_skip_spaces (' ');
01057       if (c == EOF)
01058   break;
01059       if (c != '\n')
01060   return 0;
01061     }
01062 
01063   return 1;
01064 }
01065 
01066 extern int main (int, char **);
01067 
01068 int
01069 main (int argc, char **argv)
01070 {
01071   int inf_fd;
01072   struct stat sbuf;
01073   int c;
01074 #ifdef FIXPROTO_IGNORE_LIST
01075   int i;
01076 #endif
01077   const char *cptr;
01078   int ifndef_line;
01079   int endif_line;
01080   long to_read;
01081   long int inf_size;
01082   struct symbol_list *cur_symbols;
01083 
01084   progname = "fix-header";
01085   if (argv[0] && argv[0][0])
01086     {
01087       char *p;
01088 
01089       progname = 0;
01090       for (p = argv[0]; *p; p++)
01091   if (*p == '/')
01092     progname = p;
01093       progname = progname ? progname+1 : argv[0];
01094     }
01095 
01096   if (argc < 4)
01097     {
01098       fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
01099          progname);
01100       exit (FATAL_EXIT_CODE);
01101     }
01102 
01103   inc_filename = argv[1];
01104   inc_filename_length = strlen (inc_filename);
01105 
01106 #ifdef FIXPROTO_IGNORE_LIST
01107   for (i = 0; files_to_ignore[i] != NULL; i++)
01108     {
01109       const char *const ignore_name = files_to_ignore[i];
01110       int ignore_len = strlen (ignore_name);
01111       if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
01112   {
01113     if (ignore_name[ignore_len-1] == '/'
01114         || inc_filename[ignore_len] == '\0')
01115       {
01116         if (verbose)
01117     fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
01118         exit (SUCCESS_EXIT_CODE);
01119       }
01120   }
01121 
01122     }
01123 #endif
01124 
01125   if (strcmp (inc_filename, "sys/stat.h") == 0)
01126     special_file_handling = sys_stat_h;
01127   else if (strcmp (inc_filename, "errno.h") == 0)
01128     special_file_handling = errno_h, required_other++;
01129   else if (strcmp (inc_filename, "stdlib.h") == 0)
01130     special_file_handling = stdlib_h, required_other+=2;
01131   else if (strcmp (inc_filename, "stdio.h") == 0)
01132     special_file_handling = stdio_h;
01133   include_entry = std_include_table;
01134   while (include_entry->name != NULL
01135    && ((strcmp (include_entry->name, CONTINUED) == 0)
01136        || strcmp (inc_filename, include_entry->name) != 0))
01137     include_entry++;
01138 
01139   if (include_entry->name != NULL)
01140     {
01141       const struct std_include_entry *entry;
01142       cur_symbol_table_size = 0;
01143       for (entry = include_entry; ;)
01144   {
01145     if (entry->flags)
01146       add_symbols (entry->flags, entry->names);
01147     entry++;
01148     if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
01149       break;
01150   }
01151     }
01152   else
01153     symbol_table[0].names = NULL;
01154 
01155   /* Count and mark the prototypes required for this include file.  */
01156   for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
01157     {
01158       int name_len;
01159       if (cur_symbols->flags & MACRO_SYMBOL)
01160   continue;
01161       cptr = cur_symbols->names;
01162       for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
01163   {
01164     struct fn_decl *fn = lookup_std_proto (cptr, name_len);
01165     required_unseen_count++;
01166     if (fn == NULL)
01167       fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
01168     else
01169       SET_REQUIRED (fn);
01170   }
01171     }
01172 
01173   read_scan_file (argv[2], argc - 4, argv + 4);
01174 
01175   inf_fd = open (argv[2], O_RDONLY, 0666);
01176   if (inf_fd < 0)
01177     {
01178       fprintf (stderr, "%s: Cannot open '%s' for reading -",
01179          progname, argv[2]);
01180       perror (NULL);
01181       exit (FATAL_EXIT_CODE);
01182     }
01183   if (fstat (inf_fd, &sbuf) < 0)
01184     {
01185       fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
01186       perror (NULL);
01187       exit (FATAL_EXIT_CODE);
01188     }
01189   inf_size = sbuf.st_size;
01190   inf_buffer = xmalloc (inf_size + 2);
01191   inf_ptr = inf_buffer;
01192 
01193   to_read = inf_size;
01194   while (to_read > 0)
01195     {
01196       long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
01197       if (i < 0)
01198   {
01199     fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
01200     perror (NULL);
01201     exit (FATAL_EXIT_CODE);
01202   }
01203       if (i == 0)
01204   {
01205     inf_size -= to_read;
01206     break;
01207   }
01208       to_read -= i;
01209     }
01210 
01211   close (inf_fd);
01212 
01213   /* Inf_size may have changed if read was short (as on VMS) */
01214   inf_buffer[inf_size] = '\n';
01215   inf_buffer[inf_size + 1] = '\0';
01216   inf_limit = inf_buffer + inf_size;
01217 
01218   /* If file doesn't end with '\n', add one.  */
01219   if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
01220     inf_limit++;
01221 
01222   unlink (argv[3]);
01223   outf = fopen (argv[3], "w");
01224   if (outf == NULL)
01225     {
01226       fprintf (stderr, "%s: Cannot open '%s' for writing -",
01227          progname, argv[3]);
01228       perror (NULL);
01229       exit (FATAL_EXIT_CODE);
01230     }
01231 
01232   lineno = 1;
01233 
01234   if (check_protection (&ifndef_line, &endif_line))
01235     {
01236       lbrac_line = ifndef_line+1;
01237       rbrac_line = endif_line;
01238     }
01239   else
01240     {
01241       lbrac_line = 1;
01242       rbrac_line = -1;
01243     }
01244 
01245   /* Reset input file.  */
01246   inf_ptr = inf_buffer;
01247   lineno = 1;
01248 
01249   for (;;)
01250     {
01251       if (lineno == lbrac_line)
01252   write_lbrac ();
01253       if (lineno == rbrac_line)
01254   write_rbrac ();
01255       for (;;)
01256   {
01257     struct fn_decl *fn;
01258     c = INF_GET ();
01259     if (c == EOF)
01260       break;
01261     if (ISIDST (c))
01262       {
01263         c = inf_scan_ident (&buf, c);
01264         (void) INF_UNGET (c);
01265         fputs (buf.base, outf);
01266         fn = lookup_std_proto (buf.base, strlen (buf.base));
01267         /* We only want to edit the declaration matching the one
01268      seen by scan-decls, as there can be multiple
01269      declarations, selected by #ifdef __STDC__ or whatever.  */
01270         if (fn && fn->partial && fn->partial->line_seen == lineno)
01271     {
01272       c = inf_skip_spaces (' ');
01273       if (c == EOF)
01274         break;
01275       if (c == '(')
01276         {
01277           c = inf_skip_spaces (' ');
01278           if (c == ')')
01279       {
01280         fprintf (outf, " _PARAMS((%s))", fn->params);
01281       }
01282           else
01283       {
01284         putc ('(', outf);
01285         (void) INF_UNGET (c);
01286       }
01287         }
01288       else
01289         fprintf (outf, " %c", c);
01290     }
01291       }
01292     else
01293       {
01294         putc (c, outf);
01295         if (c == '\n')
01296     break;
01297       }
01298   }
01299       if (c == EOF)
01300   break;
01301       lineno++;
01302     }
01303   if (rbrac_line < 0)
01304     write_rbrac ();
01305 
01306   fclose (outf);
01307 
01308   return 0;
01309 }