1 /* Copyright (C) 1993, 1997, 1998 Free Software Foundation, Inc. 2 This file is part of the GNU IO Library. 3 4 This library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU General Public License as 6 published by the Free Software Foundation; either version 2, or (at 7 your option) any later version. 8 9 This library is distributed in the hope that it will be useful, but 10 WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this library; see the file COPYING. If not, write to 16 the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 17 MA 02111-1307, USA. 18 19 As a special exception, if you link this library with files 20 compiled with a GNU compiler to produce an executable, this does 21 not cause the resulting executable to be covered by the GNU General 22 Public License. This exception does not however invalidate any 23 other reasons why the executable file might be covered by the GNU 24 General Public License. */ 25 26 #include <libio.h> 27 #ifdef TODO 28 Merge into libio.h ? 29 #endif 30 31 #ifndef __PMT 32 # ifdef __STDC__ 33 # define __PMT(p) p 34 # else 35 # define __PMT(p) () 36 # endif 37 #endif /*!__P*/ 38 39 typedef void *(*_IO_alloc_type) __PMT ((_IO_size_t)); 40 typedef void (*_IO_free_type) __PMT ((void*)); 41 42 struct _IO_str_fields 43 { 44 _IO_alloc_type _allocate_buffer; 45 _IO_free_type _free_buffer; 46 }; 47 48 /* This is needed for the Irix6 N32 ABI, which has a 64 bit off_t type, 49 but a 32 bit pointer type. In this case, we get 4 bytes of padding 50 after the vtable pointer. Putting them in a structure together solves 51 this problem. */ 52 53 struct _IO_streambuf 54 { 55 struct _IO_FILE _f; 56 const void *_vtable; 57 }; 58 59 typedef struct _IO_strfile_ 60 { 61 struct _IO_streambuf _sbf; 62 struct _IO_str_fields _s; 63 } _IO_strfile; 64 65 /* dynamic: set when the array object is allocated (or reallocated) as 66 necessary to hold a character sequence that can change in length. */ 67 #define _IO_STR_DYNAMIC(FP) ((FP)->_s._allocate_buffer != (_IO_alloc_type)0) 68 69 /* frozen: set when the program has requested that the array object not 70 be altered, reallocated, or freed. */ 71 #define _IO_STR_FROZEN(FP) ((FP)->_f._IO_file_flags & _IO_USER_BUF) 72