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dbus-marshal-basic.h

00001 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
00002 /* dbus-marshal-basic.h  Marshalling routines for basic (primitive) types
00003  *
00004  * Copyright (C) 2002  CodeFactory AB
00005  * Copyright (C) 2004, 2005  Red Hat, Inc.
00006  *
00007  * Licensed under the Academic Free License version 2.1
00008  *
00009  * This program is free software; you can redistribute it and/or modify
00010  * it under the terms of the GNU General Public License as published by
00011  * the Free Software Foundation; either version 2 of the License, or
00012  * (at your option) any later version.
00013  *
00014  * This program is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017  * GNU General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU General Public License
00020  * along with this program; if not, write to the Free Software
00021  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
00022  *
00023  */
00024 
00025 #ifndef DBUS_MARSHAL_BASIC_H
00026 #define DBUS_MARSHAL_BASIC_H
00027 
00028 #ifdef HAVE_BYTESWAP_H
00029 #include <byteswap.h>
00030 #endif
00031 
00032 #include <dbus/dbus-protocol.h>
00033 #include <dbus/dbus-types.h>
00034 #include <dbus/dbus-arch-deps.h>
00035 #include <dbus/dbus-string.h>
00036 
00037 #ifdef WORDS_BIGENDIAN
00038 #define DBUS_COMPILER_BYTE_ORDER DBUS_BIG_ENDIAN
00039 #else
00040 #define DBUS_COMPILER_BYTE_ORDER DBUS_LITTLE_ENDIAN
00041 #endif
00042 
00043 #ifdef HAVE_BYTESWAP_H
00044 #define DBUS_UINT16_SWAP_LE_BE_CONSTANT(val) bswap_16(val)
00045 #define DBUS_UINT32_SWAP_LE_BE_CONSTANT(val) bswap_32(val)
00046 #else /* HAVE_BYTESWAP_H */
00047 
00048 #define DBUS_UINT16_SWAP_LE_BE_CONSTANT(val)    ((dbus_uint16_t) (      \
00049     (dbus_uint16_t) ((dbus_uint16_t) (val) >> 8) |                      \
00050     (dbus_uint16_t) ((dbus_uint16_t) (val) << 8)))
00051 
00052 #define DBUS_UINT32_SWAP_LE_BE_CONSTANT(val)    ((dbus_uint32_t) (      \
00053     (((dbus_uint32_t) (val) & (dbus_uint32_t) 0x000000ffU) << 24) |     \
00054     (((dbus_uint32_t) (val) & (dbus_uint32_t) 0x0000ff00U) <<  8) |     \
00055     (((dbus_uint32_t) (val) & (dbus_uint32_t) 0x00ff0000U) >>  8) |     \
00056     (((dbus_uint32_t) (val) & (dbus_uint32_t) 0xff000000U) >> 24)))
00057 
00058 #endif /* HAVE_BYTESWAP_H */
00059 
00060 #ifdef DBUS_HAVE_INT64
00061 
00062 #ifdef HAVE_BYTESWAP_H
00063 #define DBUS_UINT64_SWAP_LE_BE_CONSTANT(val) bswap_64(val)
00064 #else /* HAVE_BYTESWAP_H */
00065 
00066 #define DBUS_UINT64_SWAP_LE_BE_CONSTANT(val)    ((dbus_uint64_t) (              \
00067       (((dbus_uint64_t) (val) &                                                 \
00068         (dbus_uint64_t) DBUS_UINT64_CONSTANT (0x00000000000000ff)) << 56) |    \
00069       (((dbus_uint64_t) (val) &                                                 \
00070         (dbus_uint64_t) DBUS_UINT64_CONSTANT (0x000000000000ff00)) << 40) |    \
00071       (((dbus_uint64_t) (val) &                                                 \
00072         (dbus_uint64_t) DBUS_UINT64_CONSTANT (0x0000000000ff0000)) << 24) |    \
00073       (((dbus_uint64_t) (val) &                                                 \
00074         (dbus_uint64_t) DBUS_UINT64_CONSTANT (0x00000000ff000000)) <<  8) |    \
00075       (((dbus_uint64_t) (val) &                                                 \
00076         (dbus_uint64_t) DBUS_UINT64_CONSTANT (0x000000ff00000000)) >>  8) |    \
00077       (((dbus_uint64_t) (val) &                                                 \
00078         (dbus_uint64_t) DBUS_UINT64_CONSTANT (0x0000ff0000000000)) >> 24) |    \
00079       (((dbus_uint64_t) (val) &                                                 \
00080         (dbus_uint64_t) DBUS_UINT64_CONSTANT (0x00ff000000000000)) >> 40) |    \
00081       (((dbus_uint64_t) (val) &                                                 \
00082         (dbus_uint64_t) DBUS_UINT64_CONSTANT (0xff00000000000000)) >> 56)))
00083 #endif /* DBUS_HAVE_INT64 */
00084 
00085 #endif /* HAVE_BYTESWAP_H */
00086 
00087 #define DBUS_UINT16_SWAP_LE_BE(val) (DBUS_UINT16_SWAP_LE_BE_CONSTANT (val))
00088 #define DBUS_INT16_SWAP_LE_BE(val)  ((dbus_int16_t)DBUS_UINT16_SWAP_LE_BE_CONSTANT (val))
00089 
00090 #define DBUS_UINT32_SWAP_LE_BE(val) (DBUS_UINT32_SWAP_LE_BE_CONSTANT (val))
00091 #define DBUS_INT32_SWAP_LE_BE(val)  ((dbus_int32_t)DBUS_UINT32_SWAP_LE_BE_CONSTANT (val))
00092 
00093 #ifdef DBUS_HAVE_INT64
00094 #  define DBUS_UINT64_SWAP_LE_BE(val) (DBUS_UINT64_SWAP_LE_BE_CONSTANT (val))
00095 #  define DBUS_INT64_SWAP_LE_BE(val)  ((dbus_int64_t)DBUS_UINT64_SWAP_LE_BE_CONSTANT (val))
00096 #endif /* DBUS_HAVE_INT64 */
00097 
00098 #ifdef WORDS_BIGENDIAN
00099 
00100 #  define DBUS_INT16_TO_BE(val) ((dbus_int16_t) (val))
00101 #  define DBUS_UINT16_TO_BE(val)        ((dbus_uint16_t) (val))
00102 #  define DBUS_INT16_TO_LE(val) (DBUS_INT16_SWAP_LE_BE (val))
00103 #  define DBUS_UINT16_TO_LE(val)        (DBUS_UINT16_SWAP_LE_BE (val))
00104 #  define DBUS_INT32_TO_BE(val) ((dbus_int32_t) (val))
00105 #  define DBUS_UINT32_TO_BE(val)        ((dbus_uint32_t) (val))
00106 #  define DBUS_INT32_TO_LE(val) (DBUS_INT32_SWAP_LE_BE (val))
00107 #  define DBUS_UINT32_TO_LE(val)        (DBUS_UINT32_SWAP_LE_BE (val))
00108 #  ifdef DBUS_HAVE_INT64
00109 #    define DBUS_INT64_TO_BE(val)       ((dbus_int64_t) (val))
00110 #    define DBUS_UINT64_TO_BE(val)      ((dbus_uint64_t) (val))
00111 #    define DBUS_INT64_TO_LE(val)       (DBUS_INT64_SWAP_LE_BE (val))
00112 #    define DBUS_UINT64_TO_LE(val)      (DBUS_UINT64_SWAP_LE_BE (val))
00113 #  endif /* DBUS_HAVE_INT64 */
00114 
00115 #else /* WORDS_BIGENDIAN */
00116 
00117 #  define DBUS_INT16_TO_LE(val) ((dbus_int16_t) (val))
00118 #  define DBUS_UINT16_TO_LE(val)        ((dbus_uint16_t) (val))
00119 #  define DBUS_INT16_TO_BE(val) ((dbus_int16_t) DBUS_UINT16_SWAP_LE_BE (val))
00120 #  define DBUS_UINT16_TO_BE(val)        (DBUS_UINT16_SWAP_LE_BE (val))
00121 #  define DBUS_INT32_TO_LE(val) ((dbus_int32_t) (val))
00122 #  define DBUS_UINT32_TO_LE(val)        ((dbus_uint32_t) (val))
00123 #  define DBUS_INT32_TO_BE(val) ((dbus_int32_t) DBUS_UINT32_SWAP_LE_BE (val))
00124 #  define DBUS_UINT32_TO_BE(val)        (DBUS_UINT32_SWAP_LE_BE (val))
00125 #  ifdef DBUS_HAVE_INT64
00126 #    define DBUS_INT64_TO_LE(val)       ((dbus_int64_t) (val))
00127 #    define DBUS_UINT64_TO_LE(val)      ((dbus_uint64_t) (val))
00128 #    define DBUS_INT64_TO_BE(val)       ((dbus_int64_t) DBUS_UINT64_SWAP_LE_BE (val))
00129 #    define DBUS_UINT64_TO_BE(val)      (DBUS_UINT64_SWAP_LE_BE (val))
00130 #  endif /* DBUS_HAVE_INT64 */
00131 #endif
00132 
00133 /* The transformation is symmetric, so the FROM just maps to the TO. */
00134 #define DBUS_INT16_FROM_LE(val)  (DBUS_INT16_TO_LE (val))
00135 #define DBUS_UINT16_FROM_LE(val) (DBUS_UINT16_TO_LE (val))
00136 #define DBUS_INT16_FROM_BE(val)  (DBUS_INT16_TO_BE (val))
00137 #define DBUS_UINT16_FROM_BE(val) (DBUS_UINT16_TO_BE (val))
00138 #define DBUS_INT32_FROM_LE(val)  (DBUS_INT32_TO_LE (val))
00139 #define DBUS_UINT32_FROM_LE(val) (DBUS_UINT32_TO_LE (val))
00140 #define DBUS_INT32_FROM_BE(val)  (DBUS_INT32_TO_BE (val))
00141 #define DBUS_UINT32_FROM_BE(val) (DBUS_UINT32_TO_BE (val))
00142 #ifdef DBUS_HAVE_INT64
00143 #  define DBUS_INT64_FROM_LE(val)        (DBUS_INT64_TO_LE (val))
00144 #  define DBUS_UINT64_FROM_LE(val) (DBUS_UINT64_TO_LE (val))
00145 #  define DBUS_INT64_FROM_BE(val)        (DBUS_INT64_TO_BE (val))
00146 #  define DBUS_UINT64_FROM_BE(val) (DBUS_UINT64_TO_BE (val))
00147 #endif /* DBUS_HAVE_INT64 */
00148 
00149 #ifndef DBUS_HAVE_INT64
00150 
00154 typedef struct
00155 {
00156   dbus_uint32_t first32;  
00157   dbus_uint32_t second32; 
00158 } DBus8ByteStruct;
00159 #endif /* DBUS_HAVE_INT64 */
00160 
00166 typedef union
00167 {
00168   dbus_int16_t  i16;   
00169   dbus_uint16_t u16;   
00170   dbus_int32_t  i32;   
00171   dbus_uint32_t u32;   
00172 #ifdef DBUS_HAVE_INT64
00173   dbus_int64_t  i64;   
00174   dbus_uint64_t u64;   
00175 #else
00176   DBus8ByteStruct u64; 
00177 #endif
00178   double dbl;          
00179   unsigned char byt;   
00180   char *str;           
00181 } DBusBasicValue;
00182 
00183 #ifdef DBUS_DISABLE_ASSERT
00184 #define _dbus_unpack_uint16(byte_order, data)           \
00185    (((byte_order) == DBUS_LITTLE_ENDIAN) ?              \
00186      DBUS_UINT16_FROM_LE (*(dbus_uint16_t*)(data)) :    \
00187      DBUS_UINT16_FROM_BE (*(dbus_uint16_t*)(data)))
00188 
00189 #define _dbus_unpack_uint32(byte_order, data)           \
00190    (((byte_order) == DBUS_LITTLE_ENDIAN) ?              \
00191      DBUS_UINT32_FROM_LE (*(dbus_uint32_t*)(data)) :    \
00192      DBUS_UINT32_FROM_BE (*(dbus_uint32_t*)(data)))
00193 #endif
00194 
00195 #ifndef _dbus_unpack_uint16
00196 dbus_uint16_t _dbus_unpack_uint16 (int                  byte_order,
00197                                    const unsigned char *data);
00198 #endif
00199 
00200 void          _dbus_pack_uint32   (dbus_uint32_t        value,
00201                                    int                  byte_order,
00202                                    unsigned char       *data);
00203 #ifndef _dbus_unpack_uint32
00204 dbus_uint32_t _dbus_unpack_uint32 (int                  byte_order,
00205                                    const unsigned char *data);
00206 #endif
00207 
00208 dbus_bool_t   _dbus_marshal_set_basic         (DBusString       *str,
00209                                                int               pos,
00210                                                int               type,
00211                                                const void       *value,
00212                                                int               byte_order,
00213                                                int              *old_end_pos,
00214                                                int              *new_end_pos);
00215 dbus_bool_t   _dbus_marshal_write_basic       (DBusString       *str,
00216                                                int               insert_at,
00217                                                int               type,
00218                                                const void       *value,
00219                                                int               byte_order,
00220                                                int              *pos_after);
00221 dbus_bool_t   _dbus_marshal_write_fixed_multi (DBusString       *str,
00222                                                int               insert_at,
00223                                                int               element_type,
00224                                                const void       *value,
00225                                                int               n_elements,
00226                                                int               byte_order,
00227                                                int              *pos_after);
00228 void          _dbus_marshal_read_basic        (const DBusString *str,
00229                                                int               pos,
00230                                                int               type,
00231                                                void             *value,
00232                                                int               byte_order,
00233                                                int              *new_pos);
00234 void          _dbus_marshal_read_fixed_multi  (const DBusString *str,
00235                                                int               pos,
00236                                                int               element_type,
00237                                                void             *value,
00238                                                int               n_elements,
00239                                                int               byte_order,
00240                                                int              *new_pos);
00241 void          _dbus_marshal_skip_basic        (const DBusString *str,
00242                                                int               type,
00243                                                int               byte_order,
00244                                                int              *pos);
00245 void          _dbus_marshal_skip_array        (const DBusString *str,
00246                                                int               element_type,
00247                                                int               byte_order,
00248                                                int              *pos);
00249 void          _dbus_marshal_set_uint32        (DBusString       *str,
00250                                                int               pos,
00251                                                dbus_uint32_t     value,
00252                                                int               byte_order);
00253 dbus_uint32_t _dbus_marshal_read_uint32       (const DBusString *str,
00254                                                int               pos,
00255                                                int               byte_order,
00256                                                int              *new_pos);
00257 dbus_bool_t   _dbus_type_is_valid             (int               typecode);
00258 int           _dbus_type_get_alignment        (int               typecode);
00259 dbus_bool_t   _dbus_type_is_fixed             (int               typecode);
00260 int           _dbus_type_get_alignment        (int               typecode);
00261 const char*   _dbus_type_to_string            (int               typecode);
00262 
00263 int           _dbus_first_type_in_signature   (const DBusString *str,
00264                                                int               pos);
00265 
00266 int           _dbus_first_type_in_signature_c_str   (const char       *str,
00267                                                      int               pos);
00268 
00269 void _dbus_swap_array (unsigned char *data,
00270                        int            n_elements,
00271                        int            alignment);
00272 
00273 #endif /* DBUS_MARSHAL_BASIC_H */

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