1 /* Copyright (C) 1993, 1997, 1998, 1999 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. 18 19 As a special exception, if you link the code in this file with 20 files compiled with a GNU compiler to produce an executable, 21 that does not cause the resulting executable to be covered by 22 the GNU Lesser General Public License. This exception does not 23 however invalidate any other reasons why the executable file 24 might be covered by the GNU Lesser General Public License. 25 This exception applies to code released by its copyright holders 26 in files containing the exception. */ 27 28 #include <libio.h> 29 #ifdef TODO 30 Merge into libio.h ? 31 #endif 32 33 typedef void *(*_IO_alloc_type) (_IO_size_t); 34 typedef void (*_IO_free_type) (void*); 35 36 struct _IO_str_fields 37 { 38 _IO_alloc_type _allocate_buffer; 39 _IO_free_type _free_buffer; 40 }; 41 42 /* This is needed for the Irix6 N32 ABI, which has a 64 bit off_t type, 43 but a 32 bit pointer type. In this case, we get 4 bytes of padding 44 after the vtable pointer. Putting them in a structure together solves 45 this problem. */ 46 47 struct _IO_streambuf 48 { 49 struct _IO_FILE _f; 50 const void *_vtable; 51 }; 52 53 typedef struct _IO_strfile_ 54 { 55 struct _IO_streambuf _sbf; 56 struct _IO_str_fields _s; 57 } _IO_strfile; 58 59 /* dynamic: set when the array object is allocated (or reallocated) as 60 necessary to hold a character sequence that can change in length. */ 61 #define _IO_STR_DYNAMIC(FP) ((FP)->_s._allocate_buffer != (_IO_alloc_type)0) 62 63 /* frozen: set when the program has requested that the array object not 64 be altered, reallocated, or freed. */ 65 #define _IO_STR_FROZEN(FP) ((FP)->_f._IO_file_flags & _IO_USER_BUF) 66