1/* GNU Objective-C Typed Streams interface. 2 Copyright (C) 1993, 1995 Free Software Foundation, Inc. 3 4This file is part of GNU CC. 5 6GNU CC is free software; you can redistribute it and/or modify it 7under the terms of the GNU General Public License as published by the 8Free Software Foundation; either version 2, or (at your option) any 9later version. 10 11GNU CC is distributed in the hope that it will be useful, but WITHOUT 12ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 14License for more details. 15 16You should have received a copy of the GNU General Public License 17along with GNU CC; see the file COPYING. If not, write to 18the Free Software Foundation, 59 Temple Place - Suite 330, 19Boston, MA 02111-1307, USA. */ 20 21/* As a special exception, if you link this library with files compiled 22 with GCC to produce an executable, this does not cause the resulting 23 executable to be covered by the GNU General Public License. This 24 exception does not however invalidate any other reasons why the 25 executable file might be covered by the GNU General Public License. */ 26 27#ifndef __typedstream_INCLUDE_GNU 28#define __typedstream_INCLUDE_GNU 29 30#include "objc/objc.h" 31#include "objc/hash.h" 32#include <stdio.h> 33 34typedef int (*objc_typed_read_func)(void*, char*, int); 35typedef int (*objc_typed_write_func)(void*, const char*, int); 36typedef int (*objc_typed_flush_func)(void*); 37typedef int (*objc_typed_eof_func)(void*); 38 39#define OBJC_READONLY 0x01 40#define OBJC_WRITEONLY 0x02 41 42#define OBJC_MANAGED_STREAM 0x01 43#define OBJC_FILE_STREAM 0x02 44#define OBJC_MEMORY_STREAM 0x04 45 46#define OBJC_TYPED_STREAM_VERSION 0x01 47 48typedef struct objc_typed_stream { 49 void* physical; 50 cache_ptr object_table; /* read/written objects */ 51 cache_ptr stream_table; /* other read/written but shared things.. */ 52 cache_ptr class_table; /* class version mapping */ 53 cache_ptr object_refs; /* forward references */ 54 int mode; /* OBJC_READONLY or OBJC_WRITEONLY */ 55 int type; /* MANAGED, FILE, MEMORY etc bit string */ 56 int version; /* version used when writing */ 57 int writing_root_p; 58 objc_typed_read_func read; 59 objc_typed_write_func write; 60 objc_typed_eof_func eof; 61 objc_typed_flush_func flush; 62} TypedStream; 63 64/* opcode masks */ 65#define _B_VALUE 0x1fU 66#define _B_CODE 0xe0U 67#define _B_SIGN 0x10U 68#define _B_NUMBER 0x0fU 69 70/* standard opcodes */ 71#define _B_INVALID 0x00U 72#define _B_SINT 0x20U 73#define _B_NINT 0x40U 74#define _B_SSTR 0x60U 75#define _B_NSTR 0x80U 76#define _B_RCOMM 0xa0U 77#define _B_UCOMM 0xc0U 78#define _B_EXT 0xe0U 79 80/* eXtension opcodes */ 81#define _BX_OBJECT 0x00U 82#define _BX_CLASS 0x01U 83#define _BX_SEL 0x02U 84#define _BX_OBJREF 0x03U 85#define _BX_OBJROOT 0x04U 86#define _BX_EXT 0x1fU 87 88/* 89** Read and write objects as specified by TYPE. All the `last' 90** arguments are pointers to the objects to read/write. 91*/ 92 93int objc_write_type (TypedStream* stream, const char* type, const void* data); 94int objc_read_type (TypedStream* stream, const char* type, void* data); 95 96int objc_write_types (TypedStream* stream, const char* type, ...); 97int objc_read_types (TypedStream* stream, const char* type, ...); 98 99int objc_write_object_reference (TypedStream* stream, id object); 100int objc_write_root_object (TypedStream* stream, id object); 101 102long objc_get_stream_class_version (TypedStream* stream, Class class); 103 104 105/* 106** Convenience functions 107*/ 108 109int objc_write_array (TypedStream* stream, const char* type, 110 int count, const void* data); 111int objc_read_array (TypedStream* stream, const char* type, 112 int count, void* data); 113 114int objc_write_object (TypedStream* stream, id object); 115int objc_read_object (TypedStream* stream, id* object); 116 117 118 119/* 120** Open a typed stream for reading or writing. MODE may be either of 121** OBJC_READONLY or OBJC_WRITEONLY. 122*/ 123 124TypedStream* objc_open_typed_stream (FILE* physical, int mode); 125TypedStream* objc_open_typed_stream_for_file (const char* file_name, int mode); 126 127void objc_close_typed_stream (TypedStream* stream); 128 129BOOL objc_end_of_typed_stream (TypedStream* stream); 130void objc_flush_typed_stream (TypedStream* stream); 131 132#endif /* not __typedstream_INCLUDE_GNU */ 133