The following fields are used

  _IO_write_base:pchar; (* Start of put area. *)

  _IO_write_ptr:pchar;  (* Current put pointer. *)

  _IO_write_end:pchar;  (* End of put area. *)

  _IO_buf_base:pchar;   (* Start of reserve area. *)

  _IO_buf_end:pchar;    (* End of reserve area. *)

  (* The following fields are used to support backing up and undo. *)

  _IO_save_base:pchar; (* Pointer to start of non-current get area. *)

  _IO_backup_base:pchar;  (* Pointer to first valid character of backup area *)

  _IO_save_end:pchar; (* Pointer to end of non-current get area. *)

  _markers:P_IO_marker;

  _chain:^TFILE;

  _fileno:integer;

  _blksize:integer;

  _old_offset:longint; (* This used to be _offset but it's too small.  *)

  _cur_column:word;

  _vtable_offset:byte;

  _shortbuf:array[1..1]of char;

  _lock:pointer;

end;

var

  stdin,stdout:pfile;

function tmpfile:pfile;cdecl;external 'c';

(* Generate a temporary filename.  *)

function tmpnam(__s:pchar):pchar;cdecl;external 'c';

(* Close STREAM.  *)

function fclose(__stream:pfile):integer;cdecl;external 'c';

(* Flush STREAM, or all streams if STREAM is NULL.  *)

function fflush (__stream:pfile):integer;cdecl;external 'c';

(* Close all streams.  *)

function fcloseall:integer;cdecl;external 'c';

(* Open a file and create a new stream for it.  *)

function fopen(fname:pchar;mode:pchar):pfile;cdecl;external 'c';

(* Open a file by fd and create a new stream for it.  *)

function fdopen(fildes:longint;mode:pchar):pfile;cdecl;external 'c';

 

(* Open a file, replacing an existing stream with it. *)

function freopen (_filename:pchar;__modes:pchar;__stream:pfile):pfile;cdecl;external 'c';

(* Create a new stream that refers to a memory buffer.  *)

function fmemopen(__s:pointer;__len:longint;__modes:pchar):pfile;cdecl;external 'c';

(* Open a stream that writes into a malloc'd buffer that is expanded as

   necessary.  *BUFLOC and *SIZELOC are updated with the buffer's location


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