gcc/libobjc/objc/typedstream.h

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/* GNU Objective-C Typed Streams interface.
Copyright (C) 1993, 1995, 2004, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any
later version.
GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __typedstream_INCLUDE_GNU
#define __typedstream_INCLUDE_GNU
#include "objc.h"
#include "hash.h"
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef int (*objc_typed_read_func)(void*, char*, int);
typedef int (*objc_typed_write_func)(void*, const char*, int);
typedef int (*objc_typed_flush_func)(void*);
typedef int (*objc_typed_eof_func)(void*);
#define OBJC_READONLY 0x01
#define OBJC_WRITEONLY 0x02
#define OBJC_MANAGED_STREAM 0x01
#define OBJC_FILE_STREAM 0x02
#define OBJC_MEMORY_STREAM 0x04
#define OBJC_TYPED_STREAM_VERSION 0x01
typedef struct objc_typed_stream {
void* physical;
cache_ptr object_table; /* read/written objects */
cache_ptr stream_table; /* other read/written but shared things.. */
cache_ptr class_table; /* class version mapping */
cache_ptr object_refs; /* forward references */
int mode; /* OBJC_READONLY or OBJC_WRITEONLY */
int type; /* MANAGED, FILE, MEMORY etc bit string */
int version; /* version used when writing */
int writing_root_p;
objc_typed_read_func read;
objc_typed_write_func write;
objc_typed_eof_func eof;
objc_typed_flush_func flush;
} TypedStream;
/* opcode masks */
#define _B_VALUE 0x1fU
#define _B_CODE 0xe0U
#define _B_SIGN 0x10U
#define _B_NUMBER 0x0fU
/* standard opcodes */
#define _B_INVALID 0x00U
#define _B_SINT 0x20U
#define _B_NINT 0x40U
#define _B_SSTR 0x60U
#define _B_NSTR 0x80U
#define _B_RCOMM 0xa0U
#define _B_UCOMM 0xc0U
#define _B_EXT 0xe0U
/* eXtension opcodes */
#define _BX_OBJECT 0x00U
#define _BX_CLASS 0x01U
#define _BX_SEL 0x02U
#define _BX_OBJREF 0x03U
#define _BX_OBJROOT 0x04U
#define _BX_EXT 0x1fU
/*
** Read and write objects as specified by TYPE. All the `last'
** arguments are pointers to the objects to read/write.
*/
int objc_write_type (TypedStream* stream, const char* type, const void* data);
int objc_read_type (TypedStream* stream, const char* type, void* data);
int objc_write_types (TypedStream* stream, const char* type, ...);
int objc_read_types (TypedStream* stream, const char* type, ...);
int objc_write_object_reference (TypedStream* stream, id object);
int objc_write_root_object (TypedStream* stream, id object);
long objc_get_stream_class_version (TypedStream* stream, Class class_type);
/*
** Convenience functions
*/
int objc_write_array (TypedStream* stream, const char* type,
int count, const void* data);
int objc_read_array (TypedStream* stream, const char* type,
int count, void* data);
int objc_write_object (TypedStream* stream, id object);
int objc_read_object (TypedStream* stream, id* object);
/*
** Open a typed stream for reading or writing. MODE may be either of
** OBJC_READONLY or OBJC_WRITEONLY.
*/
TypedStream* objc_open_typed_stream (FILE* physical, int mode);
TypedStream* objc_open_typed_stream_for_file (const char* file_name, int mode);
void objc_close_typed_stream (TypedStream* stream);
BOOL objc_end_of_typed_stream (TypedStream* stream);
void objc_flush_typed_stream (TypedStream* stream);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* not __typedstream_INCLUDE_GNU */