libcdio  0.93
bytesex.h
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1 /*
2  Copyright (C) 2000, 2004 Herbert Valerio Riedel <hvr@gnu.org>
3  Copyright (C) 2005, 2008, 2012 Rocky Bernstein <rocky@gnu.org>
4 
5  This program is free software: you can redistribute it and/or modify
6  it under the terms of the GNU General Public License as published by
7  the Free Software Foundation, either version 3 of the License, or
8  (at your option) any later version.
9 
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  GNU General Public License for more details.
14 
15  You should have received a copy of the GNU General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18 
26 #ifndef CDIO_BYTESEX_H_
27 #define CDIO_BYTESEX_H_
28 
29 #include <cdio/types.h>
30 #include <cdio/bytesex_asm.h> /* also defines CDIO_INLINE */
31 #include <cdio/logging.h>
32 
34 #define UINT16_SWAP_LE_BE_C(val) ((uint16_t) ( \
35  (((uint16_t) (val) & (uint16_t) 0x00ffU) << 8) | \
36  (((uint16_t) (val) & (uint16_t) 0xff00U) >> 8)))
37 
39 #define UINT32_SWAP_LE_BE_C(val) ((uint32_t) ( \
40  (((uint32_t) (val) & (uint32_t) 0x000000ffU) << 24) | \
41  (((uint32_t) (val) & (uint32_t) 0x0000ff00U) << 8) | \
42  (((uint32_t) (val) & (uint32_t) 0x00ff0000U) >> 8) | \
43  (((uint32_t) (val) & (uint32_t) 0xff000000U) >> 24)))
44 
46 #define UINT64_SWAP_LE_BE_C(val) ((uint64_t) ( \
47  (((uint64_t) (val) & (uint64_t) UINT64_C(0x00000000000000ff)) << 56) | \
48  (((uint64_t) (val) & (uint64_t) UINT64_C(0x000000000000ff00)) << 40) | \
49  (((uint64_t) (val) & (uint64_t) UINT64_C(0x0000000000ff0000)) << 24) | \
50  (((uint64_t) (val) & (uint64_t) UINT64_C(0x00000000ff000000)) << 8) | \
51  (((uint64_t) (val) & (uint64_t) UINT64_C(0x000000ff00000000)) >> 8) | \
52  (((uint64_t) (val) & (uint64_t) UINT64_C(0x0000ff0000000000)) >> 24) | \
53  (((uint64_t) (val) & (uint64_t) UINT64_C(0x00ff000000000000)) >> 40) | \
54  (((uint64_t) (val) & (uint64_t) UINT64_C(0xff00000000000000)) >> 56)))
55 
56 #ifndef UINT16_SWAP_LE_BE
57 # define UINT16_SWAP_LE_BE UINT16_SWAP_LE_BE_C
58 #endif
59 
60 #ifndef UINT32_SWAP_LE_BE
61 # define UINT32_SWAP_LE_BE UINT32_SWAP_LE_BE_C
62 #endif
63 
64 #ifndef UINT64_SWAP_LE_BE
65 # define UINT64_SWAP_LE_BE UINT64_SWAP_LE_BE_C
66 #endif
67 
68 static CDIO_INLINE
69 uint16_t uint16_swap_le_be (const uint16_t val)
70 {
71  return UINT16_SWAP_LE_BE (val);
72 }
73 
74 static CDIO_INLINE
75 uint32_t uint32_swap_le_be (const uint32_t val)
76 {
77  return UINT32_SWAP_LE_BE (val);
78 }
79 
80 static CDIO_INLINE
81 uint64_t uint64_swap_le_be (const uint64_t val)
82 {
83  return UINT64_SWAP_LE_BE (val);
84 }
85 
86 # define UINT8_TO_BE(val) ((uint8_t) (val))
87 # define UINT8_TO_LE(val) ((uint8_t) (val))
88 #ifdef WORDS_BIGENDIAN
89 # define UINT16_TO_BE(val) ((uint16_t) (val))
90 # define UINT16_TO_LE(val) ((uint16_t) UINT16_SWAP_LE_BE(val))
91 
92 # define UINT32_TO_BE(val) ((uint32_t) (val))
93 # define UINT32_TO_LE(val) ((uint32_t) UINT32_SWAP_LE_BE(val))
94 
95 # define UINT64_TO_BE(val) ((uint64_t) (val))
96 # define UINT64_TO_LE(val) ((uint64_t) UINT64_SWAP_LE_BE(val))
97 #else
98 # define UINT16_TO_BE(val) ((uint16_t) UINT16_SWAP_LE_BE(val))
99 # define UINT16_TO_LE(val) ((uint16_t) (val))
100 
101 # define UINT32_TO_BE(val) ((uint32_t) UINT32_SWAP_LE_BE(val))
102 # define UINT32_TO_LE(val) ((uint32_t) (val))
103 
104 # define UINT64_TO_BE(val) ((uint64_t) UINT64_SWAP_LE_BE(val))
105 # define UINT64_TO_LE(val) ((uint64_t) (val))
106 #endif
107 
109 #define UINT8_FROM_BE(val) (UINT8_TO_BE (val))
110 #define UINT8_FROM_LE(val) (UINT8_TO_LE (val))
111 #define UINT16_FROM_BE(val) (UINT16_TO_BE (val))
112 #define UINT16_FROM_LE(val) (UINT16_TO_LE (val))
113 #define UINT32_FROM_BE(val) (UINT32_TO_BE (val))
114 #define UINT32_FROM_LE(val) (UINT32_TO_LE (val))
115 #define UINT64_FROM_BE(val) (UINT64_TO_BE (val))
116 #define UINT64_FROM_LE(val) (UINT64_TO_LE (val))
117 
119 #define CVT_TO_FUNC(bits) \
120  static CDIO_INLINE uint ## bits ## _t \
121  uint ## bits ## _to_be (uint ## bits ## _t val) \
122  { return UINT ## bits ## _TO_BE (val); } \
123  static CDIO_INLINE uint ## bits ## _t \
124  uint ## bits ## _to_le (uint ## bits ## _t val) \
125  { return UINT ## bits ## _TO_LE (val); } \
126 
127 CVT_TO_FUNC(8)
128 CVT_TO_FUNC(16)
129 CVT_TO_FUNC(32)
130 CVT_TO_FUNC(64)
131 
132 #undef CVT_TO_FUNC
133 
134 #define uint8_from_be(val) (uint8_to_be (val))
135 #define uint8_from_le(val) (uint8_to_le (val))
136 #define uint16_from_be(val) (uint16_to_be (val))
137 #define uint16_from_le(val) (uint16_to_le (val))
138 #define uint32_from_be(val) (uint32_to_be (val))
139 #define uint32_from_le(val) (uint32_to_le (val))
140 #define uint64_from_be(val) (uint64_to_be (val))
141 #define uint64_from_le(val) (uint64_to_le (val))
142 
146 #define to_711(i) uint8_to_le(i)
147 
149 #define from_711(i) uint8_from_le(i)
150 
152 #define to_721(i) uint16_to_le(i)
153 
155 #define from_721(i) uint16_from_le(i)
156 
158 #define to_722(i) uint16_to_be(i)
159 
161 #define from_722(i) uint16_from_be(i)
162 
164 static CDIO_INLINE uint32_t
165 to_723(uint16_t i)
166 {
167  return uint32_swap_le_be(i) | i;
168 }
169 
171 static CDIO_INLINE uint16_t
172 from_723 (uint32_t p)
173 {
174  if (uint32_swap_le_be (p) != p)
175  cdio_warn ("from_723: broken byte order");
176 
177  return (0xFFFF & p);
178 }
179 
181 #define to_731(i) uint32_to_le(i)
182 
184 #define from_731(i) uint32_from_le(i)
185 
187 #define to_732(i) uint32_to_be(i)
188 
190 #define from_732(i) uint32_from_be(i)
191 
193 static CDIO_INLINE uint64_t
194 to_733(uint32_t i)
195 {
196  return uint64_swap_le_be(i) | i;
197 }
198 
200 static CDIO_INLINE uint32_t
201 from_733 (uint64_t p)
202 {
203  if (uint64_swap_le_be (p) != p)
204  cdio_warn ("from_733: broken byte order");
205 
206  return (UINT32_C(0xFFFFFFFF) & p);
207 }
208 
209 #endif /* CDIO_BYTESEX_H_ */
210 
211 
212 /*
213  * Local variables:
214  * c-file-style: "gnu"
215  * tab-width: 8
216  * indent-tabs-mode: nil
217  * End:
218  */
Common type definitions used pervasively in libcdio.
void void void void cdio_warn(const char format[],...) GNUC_PRINTF(1
Header to control logging and level of detail of output.
#define UINT16_SWAP_LE_BE
Definition: bytesex.h:57
#define CDIO_INLINE
Definition: bytesex_asm.h:41
#define UINT32_SWAP_LE_BE
Definition: bytesex.h:61
#define CVT_TO_FUNC(bits)
Definition: bytesex.h:119
Assembly code to handle byte-swapping.
#define UINT32_C(c)
Definition: types.h:82
#define UINT64_SWAP_LE_BE
Definition: bytesex.h:65