LCOV - code coverage report
Current view: top level - usr/include - stdio.h (source / functions) Hit Total Coverage
Test: unix_coverage_v1.19.1-740-gbf49a087b.info Lines: 3 4 75.0 %
Date: 2022-12-09 11:55:04 Functions: 3 4 75.0 %
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /* Define ISO C stdio on top of C++ iostreams.
       2                 :            :    Copyright (C) 1991-2022 Free Software Foundation, Inc.
       3                 :            :    This file is part of the GNU C Library.
       4                 :            : 
       5                 :            :    The GNU C Library is free software; you can redistribute it and/or
       6                 :            :    modify it under the terms of the GNU Lesser General Public
       7                 :            :    License as published by the Free Software Foundation; either
       8                 :            :    version 2.1 of the License, or (at your option) any later version.
       9                 :            : 
      10                 :            :    The GNU C Library 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 GNU
      13                 :            :    Lesser General Public License for more details.
      14                 :            : 
      15                 :            :    You should have received a copy of the GNU Lesser General Public
      16                 :            :    License along with the GNU C Library; if not, see
      17                 :            :    <https://www.gnu.org/licenses/>.  */
      18                 :            : 
      19                 :            : /*
      20                 :            :  *      ISO C99 Standard: 7.19 Input/output     <stdio.h>
      21                 :            :  */
      22                 :            : 
      23                 :            : #ifndef _STDIO_H
      24                 :            : #define _STDIO_H        1
      25                 :            : 
      26                 :            : #define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
      27                 :            : #include <bits/libc-header-start.h>
      28                 :            : 
      29                 :            : __BEGIN_DECLS
      30                 :            : 
      31                 :            : #define __need_size_t
      32                 :            : #define __need_NULL
      33                 :            : #include <stddef.h>
      34                 :            : 
      35                 :            : #define __need___va_list
      36                 :            : #include <stdarg.h>
      37                 :            : 
      38                 :            : #include <bits/types.h>
      39                 :            : #include <bits/types/__fpos_t.h>
      40                 :            : #include <bits/types/__fpos64_t.h>
      41                 :            : #include <bits/types/__FILE.h>
      42                 :            : #include <bits/types/FILE.h>
      43                 :            : #include <bits/types/struct_FILE.h>
      44                 :            : 
      45                 :            : #ifdef __USE_GNU
      46                 :            : # include <bits/types/cookie_io_functions_t.h>
      47                 :            : #endif
      48                 :            : 
      49                 :            : #if defined __USE_XOPEN || defined __USE_XOPEN2K8
      50                 :            : # ifdef __GNUC__
      51                 :            : #  ifndef _VA_LIST_DEFINED
      52                 :            : typedef __gnuc_va_list va_list;
      53                 :            : #   define _VA_LIST_DEFINED
      54                 :            : #  endif
      55                 :            : # else
      56                 :            : #  include <stdarg.h>
      57                 :            : # endif
      58                 :            : #endif
      59                 :            : 
      60                 :            : #if defined __USE_UNIX98 || defined __USE_XOPEN2K
      61                 :            : # ifndef __off_t_defined
      62                 :            : # ifndef __USE_FILE_OFFSET64
      63                 :            : typedef __off_t off_t;
      64                 :            : # else
      65                 :            : typedef __off64_t off_t;
      66                 :            : # endif
      67                 :            : # define __off_t_defined
      68                 :            : # endif
      69                 :            : # if defined __USE_LARGEFILE64 && !defined __off64_t_defined
      70                 :            : typedef __off64_t off64_t;
      71                 :            : # define __off64_t_defined
      72                 :            : # endif
      73                 :            : #endif
      74                 :            : 
      75                 :            : #ifdef __USE_XOPEN2K8
      76                 :            : # ifndef __ssize_t_defined
      77                 :            : typedef __ssize_t ssize_t;
      78                 :            : # define __ssize_t_defined
      79                 :            : # endif
      80                 :            : #endif
      81                 :            : 
      82                 :            : /* The type of the second argument to `fgetpos' and `fsetpos'.  */
      83                 :            : #ifndef __USE_FILE_OFFSET64
      84                 :            : typedef __fpos_t fpos_t;
      85                 :            : #else
      86                 :            : typedef __fpos64_t fpos_t;
      87                 :            : #endif
      88                 :            : #ifdef __USE_LARGEFILE64
      89                 :            : typedef __fpos64_t fpos64_t;
      90                 :            : #endif
      91                 :            : 
      92                 :            : /* The possibilities for the third argument to `setvbuf'.  */
      93                 :            : #define _IOFBF 0                /* Fully buffered.  */
      94                 :            : #define _IOLBF 1                /* Line buffered.  */
      95                 :            : #define _IONBF 2                /* No buffering.  */
      96                 :            : 
      97                 :            : 
      98                 :            : /* Default buffer size.  */
      99                 :            : #define BUFSIZ 8192
     100                 :            : 
     101                 :            : 
     102                 :            : /* The value returned by fgetc and similar functions to indicate the
     103                 :            :    end of the file.  */
     104                 :            : #define EOF (-1)
     105                 :            : 
     106                 :            : 
     107                 :            : /* The possibilities for the third argument to `fseek'.
     108                 :            :    These values should not be changed.  */
     109                 :            : #define SEEK_SET        0       /* Seek from beginning of file.  */
     110                 :            : #define SEEK_CUR        1       /* Seek from current position.  */
     111                 :            : #define SEEK_END        2       /* Seek from end of file.  */
     112                 :            : #ifdef __USE_GNU
     113                 :            : # define SEEK_DATA      3       /* Seek to next data.  */
     114                 :            : # define SEEK_HOLE      4       /* Seek to next hole.  */
     115                 :            : #endif
     116                 :            : 
     117                 :            : 
     118                 :            : #if defined __USE_MISC || defined __USE_XOPEN
     119                 :            : /* Default path prefix for `tempnam' and `tmpnam'.  */
     120                 :            : # define P_tmpdir       "/tmp"
     121                 :            : #endif
     122                 :            : 
     123                 :            : 
     124                 :            : /* Get the values:
     125                 :            :    L_tmpnam     How long an array of chars must be to be passed to `tmpnam'.
     126                 :            :    TMP_MAX      The minimum number of unique filenames generated by tmpnam
     127                 :            :                 (and tempnam when it uses tmpnam's name space),
     128                 :            :                 or tempnam (the two are separate).
     129                 :            :    L_ctermid    How long an array to pass to `ctermid'.
     130                 :            :    L_cuserid    How long an array to pass to `cuserid'.
     131                 :            :    FOPEN_MAX    Minimum number of files that can be open at once.
     132                 :            :    FILENAME_MAX Maximum length of a filename.  */
     133                 :            : #include <bits/stdio_lim.h>
     134                 :            : 
     135                 :            : 
     136                 :            : #if __GLIBC_USE (ISOC2X)
     137                 :            : /* Maximum length of printf output for a NaN.  */
     138                 :            : # define _PRINTF_NAN_LEN_MAX 4
     139                 :            : #endif
     140                 :            : 
     141                 :            : 
     142                 :            : /* Standard streams.  */
     143                 :            : extern FILE *stdin;             /* Standard input stream.  */
     144                 :            : extern FILE *stdout;            /* Standard output stream.  */
     145                 :            : extern FILE *stderr;            /* Standard error output stream.  */
     146                 :            : /* C89/C99 say they're macros.  Make them happy.  */
     147                 :            : #define stdin stdin
     148                 :            : #define stdout stdout
     149                 :            : #define stderr stderr
     150                 :            : 
     151                 :            : /* Remove file FILENAME.  */
     152                 :            : extern int remove (const char *__filename) __THROW;
     153                 :            : /* Rename file OLD to NEW.  */
     154                 :            : extern int rename (const char *__old, const char *__new) __THROW;
     155                 :            : 
     156                 :            : #ifdef __USE_ATFILE
     157                 :            : /* Rename file OLD relative to OLDFD to NEW relative to NEWFD.  */
     158                 :            : extern int renameat (int __oldfd, const char *__old, int __newfd,
     159                 :            :                      const char *__new) __THROW;
     160                 :            : #endif
     161                 :            : 
     162                 :            : #ifdef __USE_GNU
     163                 :            : /* Flags for renameat2.  */
     164                 :            : # define RENAME_NOREPLACE (1 << 0)
     165                 :            : # define RENAME_EXCHANGE (1 << 1)
     166                 :            : # define RENAME_WHITEOUT (1 << 2)
     167                 :            : 
     168                 :            : /* Rename file OLD relative to OLDFD to NEW relative to NEWFD, with
     169                 :            :    additional flags.  */
     170                 :            : extern int renameat2 (int __oldfd, const char *__old, int __newfd,
     171                 :            :                       const char *__new, unsigned int __flags) __THROW;
     172                 :            : #endif
     173                 :            : 
     174                 :            : /* Close STREAM.
     175                 :            : 
     176                 :            :    This function is a possible cancellation point and therefore not
     177                 :            :    marked with __THROW.  */
     178                 :            : extern int fclose (FILE *__stream);
     179                 :            : 
     180                 :            : #undef __attr_dealloc_fclose
     181                 :            : #define __attr_dealloc_fclose __attr_dealloc (fclose, 1)
     182                 :            : 
     183                 :            : /* Create a temporary file and open it read/write.
     184                 :            : 
     185                 :            :    This function is a possible cancellation point and therefore not
     186                 :            :    marked with __THROW.  */
     187                 :            : #ifndef __USE_FILE_OFFSET64
     188                 :            : extern FILE *tmpfile (void)
     189                 :            :   __attribute_malloc__ __attr_dealloc_fclose __wur;
     190                 :            : #else
     191                 :            : # ifdef __REDIRECT
     192                 :            : extern FILE *__REDIRECT (tmpfile, (void), tmpfile64)
     193                 :            :   __attribute_malloc__ __attr_dealloc_fclose __wur;
     194                 :            : # else
     195                 :            : #  define tmpfile tmpfile64
     196                 :            : # endif
     197                 :            : #endif
     198                 :            : 
     199                 :            : #ifdef __USE_LARGEFILE64
     200                 :            : extern FILE *tmpfile64 (void)
     201                 :            :    __attribute_malloc__ __attr_dealloc_fclose __wur;
     202                 :            : #endif
     203                 :            : 
     204                 :            : /* Generate a temporary filename.  */
     205                 :            : extern char *tmpnam (char[L_tmpnam]) __THROW __wur;
     206                 :            : 
     207                 :            : #ifdef __USE_MISC
     208                 :            : /* This is the reentrant variant of `tmpnam'.  The only difference is
     209                 :            :    that it does not allow S to be NULL.  */
     210                 :            : extern char *tmpnam_r (char __s[L_tmpnam]) __THROW __wur;
     211                 :            : #endif
     212                 :            : 
     213                 :            : 
     214                 :            : #if defined __USE_MISC || defined __USE_XOPEN
     215                 :            : /* Generate a unique temporary filename using up to five characters of PFX
     216                 :            :    if it is not NULL.  The directory to put this file in is searched for
     217                 :            :    as follows: First the environment variable "TMPDIR" is checked.
     218                 :            :    If it contains the name of a writable directory, that directory is used.
     219                 :            :    If not and if DIR is not NULL, that value is checked.  If that fails,
     220                 :            :    P_tmpdir is tried and finally "/tmp".  The storage for the filename
     221                 :            :    is allocated by `malloc'.  */
     222                 :            : extern char *tempnam (const char *__dir, const char *__pfx)
     223                 :            :    __THROW __attribute_malloc__ __wur __attr_dealloc_free;
     224                 :            : #endif
     225                 :            : 
     226                 :            : /* Flush STREAM, or all streams if STREAM is NULL.
     227                 :            : 
     228                 :            :    This function is a possible cancellation point and therefore not
     229                 :            :    marked with __THROW.  */
     230                 :            : extern int fflush (FILE *__stream);
     231                 :            : 
     232                 :            : #ifdef __USE_MISC
     233                 :            : /* Faster versions when locking is not required.
     234                 :            : 
     235                 :            :    This function is not part of POSIX and therefore no official
     236                 :            :    cancellation point.  But due to similarity with an POSIX interface
     237                 :            :    or due to the implementation it is a cancellation point and
     238                 :            :    therefore not marked with __THROW.  */
     239                 :            : extern int fflush_unlocked (FILE *__stream);
     240                 :            : #endif
     241                 :            : 
     242                 :            : #ifdef __USE_GNU
     243                 :            : /* Close all streams.
     244                 :            : 
     245                 :            :    This function is not part of POSIX and therefore no official
     246                 :            :    cancellation point.  But due to similarity with an POSIX interface
     247                 :            :    or due to the implementation it is a cancellation point and
     248                 :            :    therefore not marked with __THROW.  */
     249                 :            : extern int fcloseall (void);
     250                 :            : #endif
     251                 :            : 
     252                 :            : 
     253                 :            : #ifndef __USE_FILE_OFFSET64
     254                 :            : /* Open a file and create a new stream for it.
     255                 :            : 
     256                 :            :    This function is a possible cancellation point and therefore not
     257                 :            :    marked with __THROW.  */
     258                 :            : extern FILE *fopen (const char *__restrict __filename,
     259                 :            :                     const char *__restrict __modes)
     260                 :            :   __attribute_malloc__ __attr_dealloc_fclose __wur;
     261                 :            : /* Open a file, replacing an existing stream with it.
     262                 :            : 
     263                 :            :    This function is a possible cancellation point and therefore not
     264                 :            :    marked with __THROW.  */
     265                 :            : extern FILE *freopen (const char *__restrict __filename,
     266                 :            :                       const char *__restrict __modes,
     267                 :            :                       FILE *__restrict __stream) __wur;
     268                 :            : #else
     269                 :            : # ifdef __REDIRECT
     270                 :            : extern FILE *__REDIRECT (fopen, (const char *__restrict __filename,
     271                 :            :                                  const char *__restrict __modes), fopen64)
     272                 :            :   __attribute_malloc__ __attr_dealloc_fclose __wur;
     273                 :            : extern FILE *__REDIRECT (freopen, (const char *__restrict __filename,
     274                 :            :                                    const char *__restrict __modes,
     275                 :            :                                    FILE *__restrict __stream), freopen64)
     276                 :            :   __wur;
     277                 :            : # else
     278                 :            : #  define fopen fopen64
     279                 :            : #  define freopen freopen64
     280                 :            : # endif
     281                 :            : #endif
     282                 :            : #ifdef __USE_LARGEFILE64
     283                 :            : extern FILE *fopen64 (const char *__restrict __filename,
     284                 :            :                       const char *__restrict __modes)
     285                 :            :   __attribute_malloc__ __attr_dealloc_fclose __wur;
     286                 :            : extern FILE *freopen64 (const char *__restrict __filename,
     287                 :            :                         const char *__restrict __modes,
     288                 :            :                         FILE *__restrict __stream) __wur;
     289                 :            : #endif
     290                 :            : 
     291                 :            : #ifdef  __USE_POSIX
     292                 :            : /* Create a new stream that refers to an existing system file descriptor.  */
     293                 :            : extern FILE *fdopen (int __fd, const char *__modes) __THROW
     294                 :            :   __attribute_malloc__ __attr_dealloc_fclose __wur;
     295                 :            : #endif
     296                 :            : 
     297                 :            : #ifdef  __USE_GNU
     298                 :            : /* Create a new stream that refers to the given magic cookie,
     299                 :            :    and uses the given functions for input and output.  */
     300                 :            : extern FILE *fopencookie (void *__restrict __magic_cookie,
     301                 :            :                           const char *__restrict __modes,
     302                 :            :                           cookie_io_functions_t __io_funcs) __THROW
     303                 :            :   __attribute_malloc__ __attr_dealloc_fclose __wur;
     304                 :            : #endif
     305                 :            : 
     306                 :            : #if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
     307                 :            : /* Create a new stream that refers to a memory buffer.  */
     308                 :            : extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
     309                 :            :   __THROW __attribute_malloc__ __attr_dealloc_fclose __wur;
     310                 :            : 
     311                 :            : /* Open a stream that writes into a malloc'd buffer that is expanded as
     312                 :            :    necessary.  *BUFLOC and *SIZELOC are updated with the buffer's location
     313                 :            :    and the number of characters written on fflush or fclose.  */
     314                 :            : extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __THROW
     315                 :            :   __attribute_malloc__ __attr_dealloc_fclose __wur;
     316                 :            : 
     317                 :            : #ifdef _WCHAR_H
     318                 :            : /* Like OPEN_MEMSTREAM, but the stream is wide oriented and produces
     319                 :            :    a wide character string.  Declared here only to add attribute malloc
     320                 :            :    and only if <wchar.h> has been previously #included.  */
     321                 :            : extern __FILE *open_wmemstream (wchar_t **__bufloc, size_t *__sizeloc) __THROW
     322                 :            :   __attribute_malloc__ __attr_dealloc_fclose;
     323                 :            : # endif
     324                 :            : #endif
     325                 :            : 
     326                 :            : /* If BUF is NULL, make STREAM unbuffered.
     327                 :            :    Else make it use buffer BUF, of size BUFSIZ.  */
     328                 :            : extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW;
     329                 :            : /* Make STREAM use buffering mode MODE.
     330                 :            :    If BUF is not NULL, use N bytes of it for buffering;
     331                 :            :    else allocate an internal buffer N bytes long.  */
     332                 :            : extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
     333                 :            :                     int __modes, size_t __n) __THROW;
     334                 :            : 
     335                 :            : #ifdef  __USE_MISC
     336                 :            : /* If BUF is NULL, make STREAM unbuffered.
     337                 :            :    Else make it use SIZE bytes of BUF for buffering.  */
     338                 :            : extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
     339                 :            :                        size_t __size) __THROW;
     340                 :            : 
     341                 :            : /* Make STREAM line-buffered.  */
     342                 :            : extern void setlinebuf (FILE *__stream) __THROW;
     343                 :            : #endif
     344                 :            : 
     345                 :            : 
     346                 :            : /* Write formatted output to STREAM.
     347                 :            : 
     348                 :            :    This function is a possible cancellation point and therefore not
     349                 :            :    marked with __THROW.  */
     350                 :            : extern int fprintf (FILE *__restrict __stream,
     351                 :            :                     const char *__restrict __format, ...);
     352                 :            : /* Write formatted output to stdout.
     353                 :            : 
     354                 :            :    This function is a possible cancellation point and therefore not
     355                 :            :    marked with __THROW.  */
     356                 :          0 : extern int printf (const char *__restrict __format, ...);
     357                 :            : /* Write formatted output to S.  */
     358                 :            : extern int sprintf (char *__restrict __s,
     359                 :            :                     const char *__restrict __format, ...) __THROWNL;
     360                 :            : 
     361                 :            : /* Write formatted output to S from argument list ARG.
     362                 :            : 
     363                 :            :    This function is a possible cancellation point and therefore not
     364                 :            :    marked with __THROW.  */
     365                 :            : extern int vfprintf (FILE *__restrict __s, const char *__restrict __format,
     366                 :            :                      __gnuc_va_list __arg);
     367                 :            : /* Write formatted output to stdout from argument list ARG.
     368                 :            : 
     369                 :            :    This function is a possible cancellation point and therefore not
     370                 :            :    marked with __THROW.  */
     371                 :            : extern int vprintf (const char *__restrict __format, __gnuc_va_list __arg);
     372                 :            : /* Write formatted output to S from argument list ARG.  */
     373                 :            : extern int vsprintf (char *__restrict __s, const char *__restrict __format,
     374                 :            :                      __gnuc_va_list __arg) __THROWNL;
     375                 :            : 
     376                 :            : #if defined __USE_ISOC99 || defined __USE_UNIX98
     377                 :            : /* Maximum chars of output to write in MAXLEN.  */
     378                 :         16 : extern int snprintf (char *__restrict __s, size_t __maxlen,
     379                 :            :                      const char *__restrict __format, ...)
     380                 :            :      __THROWNL __attribute__ ((__format__ (__printf__, 3, 4)));
     381                 :            : 
     382                 :         16 : extern int vsnprintf (char *__restrict __s, size_t __maxlen,
     383                 :            :                       const char *__restrict __format, __gnuc_va_list __arg)
     384                 :            :      __THROWNL __attribute__ ((__format__ (__printf__, 3, 0)));
     385                 :            : #endif
     386                 :            : 
     387                 :            : #if __GLIBC_USE (LIB_EXT2)
     388                 :            : /* Write formatted output to a string dynamically allocated with `malloc'.
     389                 :            :    Store the address of the string in *PTR.  */
     390                 :            : extern int vasprintf (char **__restrict __ptr, const char *__restrict __f,
     391                 :            :                       __gnuc_va_list __arg)
     392                 :            :      __THROWNL __attribute__ ((__format__ (__printf__, 2, 0))) __wur;
     393                 :            : extern int __asprintf (char **__restrict __ptr,
     394                 :            :                        const char *__restrict __fmt, ...)
     395                 :            :      __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
     396                 :            : extern int asprintf (char **__restrict __ptr,
     397                 :            :                      const char *__restrict __fmt, ...)
     398                 :            :      __THROWNL __attribute__ ((__format__ (__printf__, 2, 3))) __wur;
     399                 :            : #endif
     400                 :            : 
     401                 :            : #ifdef __USE_XOPEN2K8
     402                 :            : /* Write formatted output to a file descriptor.  */
     403                 :            : extern int vdprintf (int __fd, const char *__restrict __fmt,
     404                 :            :                      __gnuc_va_list __arg)
     405                 :            :      __attribute__ ((__format__ (__printf__, 2, 0)));
     406                 :            : extern int dprintf (int __fd, const char *__restrict __fmt, ...)
     407                 :            :      __attribute__ ((__format__ (__printf__, 2, 3)));
     408                 :            : #endif
     409                 :            : 
     410                 :            : 
     411                 :            : /* Read formatted input from STREAM.
     412                 :            : 
     413                 :            :    This function is a possible cancellation point and therefore not
     414                 :            :    marked with __THROW.  */
     415                 :            : extern int fscanf (FILE *__restrict __stream,
     416                 :            :                    const char *__restrict __format, ...) __wur;
     417                 :            : /* Read formatted input from stdin.
     418                 :            : 
     419                 :            :    This function is a possible cancellation point and therefore not
     420                 :            :    marked with __THROW.  */
     421                 :            : extern int scanf (const char *__restrict __format, ...) __wur;
     422                 :            : /* Read formatted input from S.  */
     423                 :            : extern int sscanf (const char *__restrict __s,
     424                 :            :                    const char *__restrict __format, ...) __THROW;
     425                 :            : 
     426                 :            : /* For historical reasons, the C99-compliant versions of the scanf
     427                 :            :    functions are at alternative names.  When __LDBL_COMPAT or
     428                 :            :    __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI are in effect, this is handled in
     429                 :            :    bits/stdio-ldbl.h.  */
     430                 :            : #include <bits/floatn.h>
     431                 :            : #if !__GLIBC_USE (DEPRECATED_SCANF) && !defined __LDBL_COMPAT \
     432                 :            :     && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0
     433                 :            : # ifdef __REDIRECT
     434                 :            : extern int __REDIRECT (fscanf, (FILE *__restrict __stream,
     435                 :            :                                 const char *__restrict __format, ...),
     436                 :            :                        __isoc99_fscanf) __wur;
     437                 :            : extern int __REDIRECT (scanf, (const char *__restrict __format, ...),
     438                 :            :                        __isoc99_scanf) __wur;
     439                 :            : extern int __REDIRECT_NTH (sscanf, (const char *__restrict __s,
     440                 :            :                                     const char *__restrict __format, ...),
     441                 :            :                            __isoc99_sscanf);
     442                 :            : # else
     443                 :            : extern int __isoc99_fscanf (FILE *__restrict __stream,
     444                 :            :                             const char *__restrict __format, ...) __wur;
     445                 :            : extern int __isoc99_scanf (const char *__restrict __format, ...) __wur;
     446                 :            : extern int __isoc99_sscanf (const char *__restrict __s,
     447                 :            :                             const char *__restrict __format, ...) __THROW;
     448                 :            : #  define fscanf __isoc99_fscanf
     449                 :            : #  define scanf __isoc99_scanf
     450                 :            : #  define sscanf __isoc99_sscanf
     451                 :            : # endif
     452                 :            : #endif
     453                 :            : 
     454                 :            : #ifdef  __USE_ISOC99
     455                 :            : /* Read formatted input from S into argument list ARG.
     456                 :            : 
     457                 :            :    This function is a possible cancellation point and therefore not
     458                 :            :    marked with __THROW.  */
     459                 :            : extern int vfscanf (FILE *__restrict __s, const char *__restrict __format,
     460                 :            :                     __gnuc_va_list __arg)
     461                 :            :      __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
     462                 :            : 
     463                 :            : /* Read formatted input from stdin into argument list ARG.
     464                 :            : 
     465                 :            :    This function is a possible cancellation point and therefore not
     466                 :            :    marked with __THROW.  */
     467                 :            : extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg)
     468                 :            :      __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
     469                 :            : 
     470                 :            : /* Read formatted input from S into argument list ARG.  */
     471                 :            : extern int vsscanf (const char *__restrict __s,
     472                 :            :                     const char *__restrict __format, __gnuc_va_list __arg)
     473                 :            :      __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
     474                 :            : 
     475                 :            : /* Same redirection as above for the v*scanf family.  */
     476                 :            : # if !__GLIBC_USE (DEPRECATED_SCANF)
     477                 :            : #  if defined __REDIRECT && !defined __LDBL_COMPAT \
     478                 :            :       && __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 0
     479                 :            : extern int __REDIRECT (vfscanf,
     480                 :            :                        (FILE *__restrict __s,
     481                 :            :                         const char *__restrict __format, __gnuc_va_list __arg),
     482                 :            :                        __isoc99_vfscanf)
     483                 :            :      __attribute__ ((__format__ (__scanf__, 2, 0))) __wur;
     484                 :            : extern int __REDIRECT (vscanf, (const char *__restrict __format,
     485                 :            :                                 __gnuc_va_list __arg), __isoc99_vscanf)
     486                 :            :      __attribute__ ((__format__ (__scanf__, 1, 0))) __wur;
     487                 :            : extern int __REDIRECT_NTH (vsscanf,
     488                 :            :                            (const char *__restrict __s,
     489                 :            :                             const char *__restrict __format,
     490                 :            :                             __gnuc_va_list __arg), __isoc99_vsscanf)
     491                 :            :      __attribute__ ((__format__ (__scanf__, 2, 0)));
     492                 :            : #  elif !defined __REDIRECT
     493                 :            : extern int __isoc99_vfscanf (FILE *__restrict __s,
     494                 :            :                              const char *__restrict __format,
     495                 :            :                              __gnuc_va_list __arg) __wur;
     496                 :            : extern int __isoc99_vscanf (const char *__restrict __format,
     497                 :            :                             __gnuc_va_list __arg) __wur;
     498                 :            : extern int __isoc99_vsscanf (const char *__restrict __s,
     499                 :            :                              const char *__restrict __format,
     500                 :            :                              __gnuc_va_list __arg) __THROW;
     501                 :            : #   define vfscanf __isoc99_vfscanf
     502                 :            : #   define vscanf __isoc99_vscanf
     503                 :            : #   define vsscanf __isoc99_vsscanf
     504                 :            : #  endif
     505                 :            : # endif
     506                 :            : #endif /* Use ISO C9x.  */
     507                 :            : 
     508                 :            : 
     509                 :            : /* Read a character from STREAM.
     510                 :            : 
     511                 :            :    These functions are possible cancellation points and therefore not
     512                 :            :    marked with __THROW.  */
     513                 :            : extern int fgetc (FILE *__stream);
     514                 :            : extern int getc (FILE *__stream);
     515                 :            : 
     516                 :            : /* Read a character from stdin.
     517                 :            : 
     518                 :            :    This function is a possible cancellation point and therefore not
     519                 :            :    marked with __THROW.  */
     520                 :            : extern int getchar (void);
     521                 :            : 
     522                 :            : #ifdef __USE_POSIX199506
     523                 :            : /* These are defined in POSIX.1:1996.
     524                 :            : 
     525                 :            :    These functions are possible cancellation points and therefore not
     526                 :            :    marked with __THROW.  */
     527                 :            : extern int getc_unlocked (FILE *__stream);
     528                 :            : extern int getchar_unlocked (void);
     529                 :            : #endif /* Use POSIX.  */
     530                 :            : 
     531                 :            : #ifdef __USE_MISC
     532                 :            : /* Faster version when locking is not necessary.
     533                 :            : 
     534                 :            :    This function is not part of POSIX and therefore no official
     535                 :            :    cancellation point.  But due to similarity with an POSIX interface
     536                 :            :    or due to the implementation it is a cancellation point and
     537                 :            :    therefore not marked with __THROW.  */
     538                 :            : extern int fgetc_unlocked (FILE *__stream);
     539                 :            : #endif /* Use MISC.  */
     540                 :            : 
     541                 :            : 
     542                 :            : /* Write a character to STREAM.
     543                 :            : 
     544                 :            :    These functions are possible cancellation points and therefore not
     545                 :            :    marked with __THROW.
     546                 :            : 
     547                 :            :    These functions is a possible cancellation point and therefore not
     548                 :            :    marked with __THROW.  */
     549                 :            : extern int fputc (int __c, FILE *__stream);
     550                 :            : extern int putc (int __c, FILE *__stream);
     551                 :            : 
     552                 :            : /* Write a character to stdout.
     553                 :            : 
     554                 :            :    This function is a possible cancellation point and therefore not
     555                 :            :    marked with __THROW.  */
     556                 :            : extern int putchar (int __c);
     557                 :            : 
     558                 :            : #ifdef __USE_MISC
     559                 :            : /* Faster version when locking is not necessary.
     560                 :            : 
     561                 :            :    This function is not part of POSIX and therefore no official
     562                 :            :    cancellation point.  But due to similarity with an POSIX interface
     563                 :            :    or due to the implementation it is a cancellation point and
     564                 :            :    therefore not marked with __THROW.  */
     565                 :            : extern int fputc_unlocked (int __c, FILE *__stream);
     566                 :            : #endif /* Use MISC.  */
     567                 :            : 
     568                 :            : #ifdef __USE_POSIX199506
     569                 :            : /* These are defined in POSIX.1:1996.
     570                 :            : 
     571                 :            :    These functions are possible cancellation points and therefore not
     572                 :            :    marked with __THROW.  */
     573                 :            : extern int putc_unlocked (int __c, FILE *__stream);
     574                 :            : extern int putchar_unlocked (int __c);
     575                 :            : #endif /* Use POSIX.  */
     576                 :            : 
     577                 :            : 
     578                 :            : #if defined __USE_MISC \
     579                 :            :     || (defined __USE_XOPEN && !defined __USE_XOPEN2K)
     580                 :            : /* Get a word (int) from STREAM.  */
     581                 :            : extern int getw (FILE *__stream);
     582                 :            : 
     583                 :            : /* Write a word (int) to STREAM.  */
     584                 :            : extern int putw (int __w, FILE *__stream);
     585                 :            : #endif
     586                 :            : 
     587                 :            : 
     588                 :            : /* Get a newline-terminated string of finite length from STREAM.
     589                 :            : 
     590                 :            :    This function is a possible cancellation point and therefore not
     591                 :            :    marked with __THROW.  */
     592                 :            : extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
     593                 :            :      __wur __fortified_attr_access (__write_only__, 1, 2);
     594                 :            : 
     595                 :            : #if __GLIBC_USE (DEPRECATED_GETS)
     596                 :            : /* Get a newline-terminated string from stdin, removing the newline.
     597                 :            : 
     598                 :            :    This function is impossible to use safely.  It has been officially
     599                 :            :    removed from ISO C11 and ISO C++14, and we have also removed it
     600                 :            :    from the _GNU_SOURCE feature list.  It remains available when
     601                 :            :    explicitly using an old ISO C, Unix, or POSIX standard.
     602                 :            : 
     603                 :            :    This function is a possible cancellation point and therefore not
     604                 :            :    marked with __THROW.  */
     605                 :            : extern char *gets (char *__s) __wur __attribute_deprecated__;
     606                 :            : #endif
     607                 :            : 
     608                 :            : #ifdef __USE_GNU
     609                 :            : /* This function does the same as `fgets' but does not lock the stream.
     610                 :            : 
     611                 :            :    This function is not part of POSIX and therefore no official
     612                 :            :    cancellation point.  But due to similarity with an POSIX interface
     613                 :            :    or due to the implementation it is a cancellation point and
     614                 :            :    therefore not marked with __THROW.  */
     615                 :            : extern char *fgets_unlocked (char *__restrict __s, int __n,
     616                 :            :                              FILE *__restrict __stream) __wur
     617                 :            :     __fortified_attr_access (__write_only__, 1, 2);
     618                 :            : #endif
     619                 :            : 
     620                 :            : 
     621                 :            : #if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
     622                 :            : /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
     623                 :            :    (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
     624                 :            :    NULL), pointing to *N characters of space.  It is realloc'd as
     625                 :            :    necessary.  Returns the number of characters read (not including the
     626                 :            :    null terminator), or -1 on error or EOF.
     627                 :            : 
     628                 :            :    These functions are not part of POSIX and therefore no official
     629                 :            :    cancellation point.  But due to similarity with an POSIX interface
     630                 :            :    or due to the implementation they are cancellation points and
     631                 :            :    therefore not marked with __THROW.  */
     632                 :            : extern __ssize_t __getdelim (char **__restrict __lineptr,
     633                 :            :                              size_t *__restrict __n, int __delimiter,
     634                 :            :                              FILE *__restrict __stream) __wur;
     635                 :            : extern __ssize_t getdelim (char **__restrict __lineptr,
     636                 :            :                            size_t *__restrict __n, int __delimiter,
     637                 :            :                            FILE *__restrict __stream) __wur;
     638                 :            : 
     639                 :            : /* Like `getdelim', but reads up to a newline.
     640                 :            : 
     641                 :            :    This function is not part of POSIX and therefore no official
     642                 :            :    cancellation point.  But due to similarity with an POSIX interface
     643                 :            :    or due to the implementation it is a cancellation point and
     644                 :            :    therefore not marked with __THROW.  */
     645                 :            : extern __ssize_t getline (char **__restrict __lineptr,
     646                 :            :                           size_t *__restrict __n,
     647                 :            :                           FILE *__restrict __stream) __wur;
     648                 :            : #endif
     649                 :            : 
     650                 :            : 
     651                 :            : /* Write a string to STREAM.
     652                 :            : 
     653                 :            :    This function is a possible cancellation point and therefore not
     654                 :            :    marked with __THROW.  */
     655                 :            : extern int fputs (const char *__restrict __s, FILE *__restrict __stream);
     656                 :            : 
     657                 :            : /* Write a string, followed by a newline, to stdout.
     658                 :            : 
     659                 :            :    This function is a possible cancellation point and therefore not
     660                 :            :    marked with __THROW.  */
     661                 :          4 : extern int puts (const char *__s);
     662                 :            : 
     663                 :            : 
     664                 :            : /* Push a character back onto the input buffer of STREAM.
     665                 :            : 
     666                 :            :    This function is a possible cancellation point and therefore not
     667                 :            :    marked with __THROW.  */
     668                 :            : extern int ungetc (int __c, FILE *__stream);
     669                 :            : 
     670                 :            : 
     671                 :            : /* Read chunks of generic data from STREAM.
     672                 :            : 
     673                 :            :    This function is a possible cancellation point and therefore not
     674                 :            :    marked with __THROW.  */
     675                 :            : extern size_t fread (void *__restrict __ptr, size_t __size,
     676                 :            :                      size_t __n, FILE *__restrict __stream) __wur;
     677                 :            : /* Write chunks of generic data to STREAM.
     678                 :            : 
     679                 :            :    This function is a possible cancellation point and therefore not
     680                 :            :    marked with __THROW.  */
     681                 :            : extern size_t fwrite (const void *__restrict __ptr, size_t __size,
     682                 :            :                       size_t __n, FILE *__restrict __s);
     683                 :            : 
     684                 :            : #ifdef __USE_GNU
     685                 :            : /* This function does the same as `fputs' but does not lock the stream.
     686                 :            : 
     687                 :            :    This function is not part of POSIX and therefore no official
     688                 :            :    cancellation point.  But due to similarity with an POSIX interface
     689                 :            :    or due to the implementation it is a cancellation point and
     690                 :            :    therefore not marked with __THROW.  */
     691                 :            : extern int fputs_unlocked (const char *__restrict __s,
     692                 :            :                            FILE *__restrict __stream);
     693                 :            : #endif
     694                 :            : 
     695                 :            : #ifdef __USE_MISC
     696                 :            : /* Faster versions when locking is not necessary.
     697                 :            : 
     698                 :            :    These functions are not part of POSIX and therefore no official
     699                 :            :    cancellation point.  But due to similarity with an POSIX interface
     700                 :            :    or due to the implementation they are cancellation points and
     701                 :            :    therefore not marked with __THROW.  */
     702                 :            : extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
     703                 :            :                               size_t __n, FILE *__restrict __stream) __wur;
     704                 :            : extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size,
     705                 :            :                                size_t __n, FILE *__restrict __stream);
     706                 :            : #endif
     707                 :            : 
     708                 :            : 
     709                 :            : /* Seek to a certain position on STREAM.
     710                 :            : 
     711                 :            :    This function is a possible cancellation point and therefore not
     712                 :            :    marked with __THROW.  */
     713                 :            : extern int fseek (FILE *__stream, long int __off, int __whence);
     714                 :            : /* Return the current position of STREAM.
     715                 :            : 
     716                 :            :    This function is a possible cancellation point and therefore not
     717                 :            :    marked with __THROW.  */
     718                 :            : extern long int ftell (FILE *__stream) __wur;
     719                 :            : /* Rewind to the beginning of STREAM.
     720                 :            : 
     721                 :            :    This function is a possible cancellation point and therefore not
     722                 :            :    marked with __THROW.  */
     723                 :            : extern void rewind (FILE *__stream);
     724                 :            : 
     725                 :            : /* The Single Unix Specification, Version 2, specifies an alternative,
     726                 :            :    more adequate interface for the two functions above which deal with
     727                 :            :    file offset.  `long int' is not the right type.  These definitions
     728                 :            :    are originally defined in the Large File Support API.  */
     729                 :            : 
     730                 :            : #if defined __USE_LARGEFILE || defined __USE_XOPEN2K
     731                 :            : # ifndef __USE_FILE_OFFSET64
     732                 :            : /* Seek to a certain position on STREAM.
     733                 :            : 
     734                 :            :    This function is a possible cancellation point and therefore not
     735                 :            :    marked with __THROW.  */
     736                 :            : extern int fseeko (FILE *__stream, __off_t __off, int __whence);
     737                 :            : /* Return the current position of STREAM.
     738                 :            : 
     739                 :            :    This function is a possible cancellation point and therefore not
     740                 :            :    marked with __THROW.  */
     741                 :            : extern __off_t ftello (FILE *__stream) __wur;
     742                 :            : # else
     743                 :            : #  ifdef __REDIRECT
     744                 :            : extern int __REDIRECT (fseeko,
     745                 :            :                        (FILE *__stream, __off64_t __off, int __whence),
     746                 :            :                        fseeko64);
     747                 :            : extern __off64_t __REDIRECT (ftello, (FILE *__stream), ftello64);
     748                 :            : #  else
     749                 :            : #   define fseeko fseeko64
     750                 :            : #   define ftello ftello64
     751                 :            : #  endif
     752                 :            : # endif
     753                 :            : #endif
     754                 :            : 
     755                 :            : #ifndef __USE_FILE_OFFSET64
     756                 :            : /* Get STREAM's position.
     757                 :            : 
     758                 :            :    This function is a possible cancellation point and therefore not
     759                 :            :    marked with __THROW.  */
     760                 :            : extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
     761                 :            : /* Set STREAM's position.
     762                 :            : 
     763                 :            :    This function is a possible cancellation point and therefore not
     764                 :            :    marked with __THROW.  */
     765                 :            : extern int fsetpos (FILE *__stream, const fpos_t *__pos);
     766                 :            : #else
     767                 :            : # ifdef __REDIRECT
     768                 :            : extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
     769                 :            :                                  fpos_t *__restrict __pos), fgetpos64);
     770                 :            : extern int __REDIRECT (fsetpos,
     771                 :            :                        (FILE *__stream, const fpos_t *__pos), fsetpos64);
     772                 :            : # else
     773                 :            : #  define fgetpos fgetpos64
     774                 :            : #  define fsetpos fsetpos64
     775                 :            : # endif
     776                 :            : #endif
     777                 :            : 
     778                 :            : #ifdef __USE_LARGEFILE64
     779                 :            : extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence);
     780                 :            : extern __off64_t ftello64 (FILE *__stream) __wur;
     781                 :            : extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos);
     782                 :            : extern int fsetpos64 (FILE *__stream, const fpos64_t *__pos);
     783                 :            : #endif
     784                 :            : 
     785                 :            : /* Clear the error and EOF indicators for STREAM.  */
     786                 :            : extern void clearerr (FILE *__stream) __THROW;
     787                 :            : /* Return the EOF indicator for STREAM.  */
     788                 :            : extern int feof (FILE *__stream) __THROW __wur;
     789                 :            : /* Return the error indicator for STREAM.  */
     790                 :            : extern int ferror (FILE *__stream) __THROW __wur;
     791                 :            : 
     792                 :            : #ifdef __USE_MISC
     793                 :            : /* Faster versions when locking is not required.  */
     794                 :            : extern void clearerr_unlocked (FILE *__stream) __THROW;
     795                 :            : extern int feof_unlocked (FILE *__stream) __THROW __wur;
     796                 :            : extern int ferror_unlocked (FILE *__stream) __THROW __wur;
     797                 :            : #endif
     798                 :            : 
     799                 :            : 
     800                 :            : /* Print a message describing the meaning of the value of errno.
     801                 :            : 
     802                 :            :    This function is a possible cancellation point and therefore not
     803                 :            :    marked with __THROW.  */
     804                 :            : extern void perror (const char *__s);
     805                 :            : 
     806                 :            : 
     807                 :            : #ifdef  __USE_POSIX
     808                 :            : /* Return the system file descriptor for STREAM.  */
     809                 :            : extern int fileno (FILE *__stream) __THROW __wur;
     810                 :            : #endif /* Use POSIX.  */
     811                 :            : 
     812                 :            : #ifdef __USE_MISC
     813                 :            : /* Faster version when locking is not required.  */
     814                 :            : extern int fileno_unlocked (FILE *__stream) __THROW __wur;
     815                 :            : #endif
     816                 :            : 
     817                 :            : 
     818                 :            : #ifdef __USE_POSIX2
     819                 :            : /* Close a stream opened by popen and return the status of its child.
     820                 :            : 
     821                 :            :    This function is a possible cancellation point and therefore not
     822                 :            :    marked with __THROW.  */
     823                 :            : extern int pclose (FILE *__stream);
     824                 :            : 
     825                 :            : /* Create a new stream connected to a pipe running the given command.
     826                 :            : 
     827                 :            :    This function is a possible cancellation point and therefore not
     828                 :            :    marked with __THROW.  */
     829                 :            : extern FILE *popen (const char *__command, const char *__modes)
     830                 :            :   __attribute_malloc__ __attr_dealloc (pclose, 1) __wur;
     831                 :            : 
     832                 :            : #endif
     833                 :            : 
     834                 :            : 
     835                 :            : #ifdef  __USE_POSIX
     836                 :            : /* Return the name of the controlling terminal.  */
     837                 :            : extern char *ctermid (char *__s) __THROW
     838                 :            :   __attr_access ((__write_only__, 1));
     839                 :            : #endif /* Use POSIX.  */
     840                 :            : 
     841                 :            : 
     842                 :            : #if (defined __USE_XOPEN && !defined __USE_XOPEN2K) || defined __USE_GNU
     843                 :            : /* Return the name of the current user.  */
     844                 :            : extern char *cuserid (char *__s)
     845                 :            :   __attr_access ((__write_only__, 1));
     846                 :            : #endif /* Use X/Open, but not issue 6.  */
     847                 :            : 
     848                 :            : 
     849                 :            : #ifdef  __USE_GNU
     850                 :            : struct obstack;                 /* See <obstack.h>.  */
     851                 :            : 
     852                 :            : /* Write formatted output to an obstack.  */
     853                 :            : extern int obstack_printf (struct obstack *__restrict __obstack,
     854                 :            :                            const char *__restrict __format, ...)
     855                 :            :      __THROWNL __attribute__ ((__format__ (__printf__, 2, 3)));
     856                 :            : extern int obstack_vprintf (struct obstack *__restrict __obstack,
     857                 :            :                             const char *__restrict __format,
     858                 :            :                             __gnuc_va_list __args)
     859                 :            :      __THROWNL __attribute__ ((__format__ (__printf__, 2, 0)));
     860                 :            : #endif /* Use GNU.  */
     861                 :            : 
     862                 :            : 
     863                 :            : #ifdef __USE_POSIX199506
     864                 :            : /* These are defined in POSIX.1:1996.  */
     865                 :            : 
     866                 :            : /* Acquire ownership of STREAM.  */
     867                 :            : extern void flockfile (FILE *__stream) __THROW;
     868                 :            : 
     869                 :            : /* Try to acquire ownership of STREAM but do not block if it is not
     870                 :            :    possible.  */
     871                 :            : extern int ftrylockfile (FILE *__stream) __THROW __wur;
     872                 :            : 
     873                 :            : /* Relinquish the ownership granted for STREAM.  */
     874                 :            : extern void funlockfile (FILE *__stream) __THROW;
     875                 :            : #endif /* POSIX */
     876                 :            : 
     877                 :            : #if defined __USE_XOPEN && !defined __USE_XOPEN2K && !defined __USE_GNU
     878                 :            : /*  X/Open Issues 1-5 required getopt to be declared in this
     879                 :            :    header.  It was removed in Issue 6.  GNU follows Issue 6.  */
     880                 :            : # include <bits/getopt_posix.h>
     881                 :            : #endif
     882                 :            : 
     883                 :            : /* Slow-path routines used by the optimized inline functions in
     884                 :            :    bits/stdio.h.  */
     885                 :            : extern int __uflow (FILE *);
     886                 :            : extern int __overflow (FILE *, int);
     887                 :            : 
     888                 :            : /* If we are compiling with optimizing read this file.  It contains
     889                 :            :    several optimizing inline functions and macros.  */
     890                 :            : #ifdef __USE_EXTERN_INLINES
     891                 :            : # include <bits/stdio.h>
     892                 :            : #endif
     893                 :            : #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
     894                 :            : # include <bits/stdio2.h>
     895                 :            : #endif
     896                 :            : 
     897                 :            : #include <bits/floatn.h>
     898                 :            : #if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
     899                 :            : # include <bits/stdio-ldbl.h>
     900                 :            : #endif
     901                 :            : 
     902                 :            : __END_DECLS
     903                 :            : 
     904                 :            : #endif /* <stdio.h> included.  */

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