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extract.h (276788) extract.h (285275)
1/*
2 * Copyright (c) 1992, 1993, 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and

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111/*
112 * This isn't a GCC-compatible compiler, we don't have __attribute__,
113 * or we do but we don't know of any better way with this instruction
114 * set to do unaligned loads, so do unaligned loads of big-endian
115 * quantities the hard way - fetch the bytes one at a time and
116 * assemble them.
117 */
118#define EXTRACT_16BITS(p) \
1/*
2 * Copyright (c) 1992, 1993, 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and

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111/*
112 * This isn't a GCC-compatible compiler, we don't have __attribute__,
113 * or we do but we don't know of any better way with this instruction
114 * set to do unaligned loads, so do unaligned loads of big-endian
115 * quantities the hard way - fetch the bytes one at a time and
116 * assemble them.
117 */
118#define EXTRACT_16BITS(p) \
119 ((uint16_t)((uint16_t)*((const uint8_t *)(p) + 0) << 8 | \
120 (uint16_t)*((const uint8_t *)(p) + 1)))
119 ((uint16_t)(((uint16_t)(*((const uint8_t *)(p) + 0)) << 8) | \
120 ((uint16_t)(*((const uint8_t *)(p) + 1)) << 0)))
121#define EXTRACT_32BITS(p) \
121#define EXTRACT_32BITS(p) \
122 ((uint32_t)((uint32_t)*((const uint8_t *)(p) + 0) << 24 | \
123 (uint32_t)*((const uint8_t *)(p) + 1) << 16 | \
124 (uint32_t)*((const uint8_t *)(p) + 2) << 8 | \
125 (uint32_t)*((const uint8_t *)(p) + 3)))
122 ((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 0)) << 24) | \
123 ((uint32_t)(*((const uint8_t *)(p) + 1)) << 16) | \
124 ((uint32_t)(*((const uint8_t *)(p) + 2)) << 8) | \
125 ((uint32_t)(*((const uint8_t *)(p) + 3)) << 0)))
126#define EXTRACT_64BITS(p) \
126#define EXTRACT_64BITS(p) \
127 ((uint64_t)((uint64_t)*((const uint8_t *)(p) + 0) << 56 | \
128 (uint64_t)*((const uint8_t *)(p) + 1) << 48 | \
129 (uint64_t)*((const uint8_t *)(p) + 2) << 40 | \
130 (uint64_t)*((const uint8_t *)(p) + 3) << 32 | \
131 (uint64_t)*((const uint8_t *)(p) + 4) << 24 | \
132 (uint64_t)*((const uint8_t *)(p) + 5) << 16 | \
133 (uint64_t)*((const uint8_t *)(p) + 6) << 8 | \
134 (uint64_t)*((const uint8_t *)(p) + 7)))
127 ((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 56) | \
128 ((uint64_t)(*((const uint8_t *)(p) + 1)) << 48) | \
129 ((uint64_t)(*((const uint8_t *)(p) + 2)) << 40) | \
130 ((uint64_t)(*((const uint8_t *)(p) + 3)) << 32) | \
131 ((uint64_t)(*((const uint8_t *)(p) + 4)) << 24) | \
132 ((uint64_t)(*((const uint8_t *)(p) + 5)) << 16) | \
133 ((uint64_t)(*((const uint8_t *)(p) + 6)) << 8) | \
134 ((uint64_t)(*((const uint8_t *)(p) + 7)) << 0)))
135#endif /* must special-case unaligned accesses */
136#else /* LBL_ALIGN */
137/*
138 * The processor natively handles unaligned loads, so we can just
139 * cast the pointer and fetch through it.
140 */
141static inline uint16_t
142EXTRACT_16BITS(const void *p)

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156 return ((uint64_t)(((uint64_t)ntohl(*((const uint32_t *)(p) + 0))) << 32 | \
157 ((uint64_t)ntohl(*((const uint32_t *)(p) + 1))) << 0));
158
159}
160
161#endif /* LBL_ALIGN */
162
163#define EXTRACT_24BITS(p) \
135#endif /* must special-case unaligned accesses */
136#else /* LBL_ALIGN */
137/*
138 * The processor natively handles unaligned loads, so we can just
139 * cast the pointer and fetch through it.
140 */
141static inline uint16_t
142EXTRACT_16BITS(const void *p)

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156 return ((uint64_t)(((uint64_t)ntohl(*((const uint32_t *)(p) + 0))) << 32 | \
157 ((uint64_t)ntohl(*((const uint32_t *)(p) + 1))) << 0));
158
159}
160
161#endif /* LBL_ALIGN */
162
163#define EXTRACT_24BITS(p) \
164 ((uint32_t)((uint32_t)*((const uint8_t *)(p) + 0) << 16 | \
165 (uint32_t)*((const uint8_t *)(p) + 1) << 8 | \
166 (uint32_t)*((const uint8_t *)(p) + 2)))
164 ((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 0)) << 16) | \
165 ((uint32_t)(*((const uint8_t *)(p) + 1)) << 8) | \
166 ((uint32_t)(*((const uint8_t *)(p) + 2)) << 0)))
167
168#define EXTRACT_40BITS(p) \
167
168#define EXTRACT_40BITS(p) \
169 ((uint64_t)((uint64_t)*((const uint8_t *)(p) + 0) << 32 | \
170 (uint64_t)*((const uint8_t *)(p) + 1) << 24 | \
171 (uint64_t)*((const uint8_t *)(p) + 2) << 16 | \
172 (uint64_t)*((const uint8_t *)(p) + 3) << 8 | \
173 (uint64_t)*((const uint8_t *)(p) + 4)))
169 ((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 32) | \
170 ((uint64_t)(*((const uint8_t *)(p) + 1)) << 24) | \
171 ((uint64_t)(*((const uint8_t *)(p) + 2)) << 16) | \
172 ((uint64_t)(*((const uint8_t *)(p) + 3)) << 8) | \
173 ((uint64_t)(*((const uint8_t *)(p) + 4)) << 0)))
174
175#define EXTRACT_48BITS(p) \
174
175#define EXTRACT_48BITS(p) \
176 ((uint64_t)((uint64_t)*((const uint8_t *)(p) + 0) << 40 | \
177 (uint64_t)*((const uint8_t *)(p) + 1) << 32 | \
178 (uint64_t)*((const uint8_t *)(p) + 2) << 24 | \
179 (uint64_t)*((const uint8_t *)(p) + 3) << 16 | \
180 (uint64_t)*((const uint8_t *)(p) + 4) << 8 | \
181 (uint64_t)*((const uint8_t *)(p) + 5)))
176 ((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 40) | \
177 ((uint64_t)(*((const uint8_t *)(p) + 1)) << 32) | \
178 ((uint64_t)(*((const uint8_t *)(p) + 2)) << 24) | \
179 ((uint64_t)(*((const uint8_t *)(p) + 3)) << 16) | \
180 ((uint64_t)(*((const uint8_t *)(p) + 4)) << 8) | \
181 ((uint64_t)(*((const uint8_t *)(p) + 5)) << 0)))
182
183#define EXTRACT_56BITS(p) \
182
183#define EXTRACT_56BITS(p) \
184 ((uint64_t)((uint64_t)*((const uint8_t *)(p) + 0) << 48 | \
185 (uint64_t)*((const uint8_t *)(p) + 1) << 40 | \
186 (uint64_t)*((const uint8_t *)(p) + 2) << 32 | \
187 (uint64_t)*((const uint8_t *)(p) + 3) << 24 | \
188 (uint64_t)*((const uint8_t *)(p) + 4) << 16 | \
189 (uint64_t)*((const uint8_t *)(p) + 5) << 8 | \
190 (uint64_t)*((const uint8_t *)(p) + 6)))
184 ((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 48) | \
185 ((uint64_t)(*((const uint8_t *)(p) + 1)) << 40) | \
186 ((uint64_t)(*((const uint8_t *)(p) + 2)) << 32) | \
187 ((uint64_t)(*((const uint8_t *)(p) + 3)) << 24) | \
188 ((uint64_t)(*((const uint8_t *)(p) + 4)) << 16) | \
189 ((uint64_t)(*((const uint8_t *)(p) + 5)) << 8) | \
190 ((uint64_t)(*((const uint8_t *)(p) + 6)) << 0)))
191
192/*
193 * Macros to extract possibly-unaligned little-endian integral values.
194 * XXX - do loads on little-endian machines that support unaligned loads?
195 */
196#define EXTRACT_LE_8BITS(p) (*(p))
197#define EXTRACT_LE_16BITS(p) \
191
192/*
193 * Macros to extract possibly-unaligned little-endian integral values.
194 * XXX - do loads on little-endian machines that support unaligned loads?
195 */
196#define EXTRACT_LE_8BITS(p) (*(p))
197#define EXTRACT_LE_16BITS(p) \
198 ((uint16_t)((uint16_t)*((const uint8_t *)(p) + 1) << 8 | \
199 (uint16_t)*((const uint8_t *)(p) + 0)))
198 ((uint16_t)(((uint16_t)(*((const uint8_t *)(p) + 1)) << 8) | \
199 ((uint16_t)(*((const uint8_t *)(p) + 0)) << 0)))
200#define EXTRACT_LE_32BITS(p) \
200#define EXTRACT_LE_32BITS(p) \
201 ((uint32_t)((uint32_t)*((const uint8_t *)(p) + 3) << 24 | \
202 (uint32_t)*((const uint8_t *)(p) + 2) << 16 | \
203 (uint32_t)*((const uint8_t *)(p) + 1) << 8 | \
204 (uint32_t)*((const uint8_t *)(p) + 0)))
201 ((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 3)) << 24) | \
202 ((uint32_t)(*((const uint8_t *)(p) + 2)) << 16) | \
203 ((uint32_t)(*((const uint8_t *)(p) + 1)) << 8) | \
204 ((uint32_t)(*((const uint8_t *)(p) + 0)) << 0)))
205#define EXTRACT_LE_24BITS(p) \
205#define EXTRACT_LE_24BITS(p) \
206 ((uint32_t)((uint32_t)*((const uint8_t *)(p) + 2) << 16 | \
207 (uint32_t)*((const uint8_t *)(p) + 1) << 8 | \
208 (uint32_t)*((const uint8_t *)(p) + 0)))
206 ((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 2)) << 16) | \
207 ((uint32_t)(*((const uint8_t *)(p) + 1)) << 8) | \
208 ((uint32_t)(*((const uint8_t *)(p) + 0)) << 0)))
209#define EXTRACT_LE_64BITS(p) \
209#define EXTRACT_LE_64BITS(p) \
210 ((uint64_t)((uint64_t)*((const uint8_t *)(p) + 7) << 56 | \
211 (uint64_t)*((const uint8_t *)(p) + 6) << 48 | \
212 (uint64_t)*((const uint8_t *)(p) + 5) << 40 | \
213 (uint64_t)*((const uint8_t *)(p) + 4) << 32 | \
214 (uint64_t)*((const uint8_t *)(p) + 3) << 24 | \
215 (uint64_t)*((const uint8_t *)(p) + 2) << 16 | \
216 (uint64_t)*((const uint8_t *)(p) + 1) << 8 | \
217 (uint64_t)*((const uint8_t *)(p) + 0)))
210 ((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 7)) << 56) | \
211 ((uint64_t)(*((const uint8_t *)(p) + 6)) << 48) | \
212 ((uint64_t)(*((const uint8_t *)(p) + 5)) << 40) | \
213 ((uint64_t)(*((const uint8_t *)(p) + 4)) << 32) | \
214 ((uint64_t)(*((const uint8_t *)(p) + 3)) << 24) | \
215 ((uint64_t)(*((const uint8_t *)(p) + 2)) << 16) | \
216 ((uint64_t)(*((const uint8_t *)(p) + 1)) << 8) | \
217 ((uint64_t)(*((const uint8_t *)(p) + 0)) << 0)))