contrib/gcc-4.4/libobjc/objc/typedstream.h

   1 /* GNU Objective-C Typed Streams interface.
   2    Copyright (C) 1993, 1995, 2004, 2009 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it
   7 under the terms of the GNU General Public License as published by the
   8 Free Software Foundation; either version 3, or (at your option) any
   9 later version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT
  12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  14 License for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25
  26 #ifndef __typedstream_INCLUDE_GNU
  27 #define __typedstream_INCLUDE_GNU
  28
  29 #include "objc.h"
  30 #include "hash.h"
  31
  32 #include <stdio.h>
  33
  34 #ifdef __cplusplus
  35 extern "C" {
  36 #endif /* __cplusplus */
  37
  38 typedef int (*objc_typed_read_func)(void*, char*, int);
  39 typedef int (*objc_typed_write_func)(void*, const char*, int);
  40 typedef int (*objc_typed_flush_func)(void*);
  41 typedef int (*objc_typed_eof_func)(void*);
  42
  43 #define OBJC_READONLY   0x01
  44 #define OBJC_WRITEONLY  0x02
  45
  46 #define OBJC_MANAGED_STREAM  0x01
  47 #define OBJC_FILE_STREAM     0x02
  48 #define OBJC_MEMORY_STREAM   0x04
  49
  50 #define OBJC_TYPED_STREAM_VERSION 0x01
  51
  52 typedef struct objc_typed_stream {
  53   void* physical;
  54   cache_ptr object_table;       /* read/written objects */
  55   cache_ptr stream_table;       /* other read/written but shared things.. */
  56   cache_ptr class_table;        /* class version mapping */
  57   cache_ptr object_refs;        /* forward references */
  58   int mode;                     /* OBJC_READONLY or OBJC_WRITEONLY */
  59   int type;                     /* MANAGED, FILE, MEMORY etc bit string */
  60   int version;                  /* version used when writing */
  61   int writing_root_p;
  62   objc_typed_read_func read;
  63   objc_typed_write_func write;
  64   objc_typed_eof_func eof;
  65   objc_typed_flush_func flush;
  66 } TypedStream;
  67
  68 /* opcode masks */
  69 #define _B_VALUE   0x1fU
  70 #define _B_CODE    0xe0U
  71 #define _B_SIGN    0x10U
  72 #define _B_NUMBER  0x0fU
  73
  74 /* standard opcodes */
  75 #define _B_INVALID 0x00U
  76 #define _B_SINT    0x20U
  77 #define _B_NINT    0x40U
  78 #define _B_SSTR    0x60U
  79 #define _B_NSTR    0x80U
  80 #define _B_RCOMM   0xa0U
  81 #define _B_UCOMM   0xc0U
  82 #define _B_EXT     0xe0U
  83
  84 /* eXtension opcodes */
  85 #define _BX_OBJECT  0x00U
  86 #define _BX_CLASS   0x01U
  87 #define _BX_SEL     0x02U
  88 #define _BX_OBJREF  0x03U
  89 #define _BX_OBJROOT 0x04U
  90 #define _BX_EXT     0x1fU
  91
  92 /*
  93 ** Read and write objects as specified by TYPE.  All the `last'
  94 ** arguments are pointers to the objects to read/write.
  95 */
  96
  97 int objc_write_type (TypedStream* stream, const char* type, const void* data);
  98 int objc_read_type (TypedStream* stream, const char* type, void* data);
  99
 100 int objc_write_types (TypedStream* stream, const char* type, ...);
 101 int objc_read_types (TypedStream* stream, const char* type, ...);
 102
 103 int objc_write_object_reference (TypedStream* stream, id object);
 104 int objc_write_root_object (TypedStream* stream, id object);
 105
 106 long objc_get_stream_class_version (TypedStream* stream, Class class_type);
 107
 108
 109 /*
 110 ** Convenience functions
 111 */
 112
 113 int objc_write_array (TypedStream* stream, const char* type,
 114                       int count, const void* data);
 115 int objc_read_array (TypedStream* stream, const char* type,
 116                      int count, void* data);
 117
 118 int objc_write_object (TypedStream* stream, id object);
 119 int objc_read_object (TypedStream* stream, id* object);
 120
 121
 122
 123 /*
 124 ** Open a typed stream for reading or writing.  MODE may be either of
 125 ** OBJC_READONLY or OBJC_WRITEONLY.
 126 */
 127
 128 TypedStream* objc_open_typed_stream (FILE* physical, int mode);
 129 TypedStream* objc_open_typed_stream_for_file (const char* file_name, int mode);
 130
 131 void objc_close_typed_stream (TypedStream* stream);
 132
 133 BOOL objc_end_of_typed_stream (TypedStream* stream);
 134 void objc_flush_typed_stream (TypedStream* stream);
 135
 136 #ifdef __cplusplus
 137 }
 138 #endif /* __cplusplus */
 139
 140 #endif /* not __typedstream_INCLUDE_GNU */