OpenJPEG 2.5.3
opj_intmath.h
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1/*
2 * The copyright in this software is being made available under the 2-clauses
3 * BSD License, included below. This software may be subject to other third
4 * party and contributor rights, including patent rights, and no such rights
5 * are granted under this license.
6 *
7 * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
8 * Copyright (c) 2002-2014, Professor Benoit Macq
9 * Copyright (c) 2001-2003, David Janssens
10 * Copyright (c) 2002-2003, Yannick Verschueren
11 * Copyright (c) 2003-2007, Francois-Olivier Devaux
12 * Copyright (c) 2003-2014, Antonin Descampe
13 * Copyright (c) 2005, Herve Drolon, FreeImage Team
14 * All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37#ifndef OPJ_INTMATH_H
38#define OPJ_INTMATH_H
48
51/* ----------------------------------------------------------------------- */
57{
58 return a < b ? a : b;
59}
60
66{
67 return a < b ? a : b;
68}
69
75{
76 return (a > b) ? a : b;
77}
78
84{
85 return (a > b) ? a : b;
86}
87
93{
94 OPJ_UINT64 sum = (OPJ_UINT64)a + (OPJ_UINT64)b;
95 return (OPJ_UINT32)(-(OPJ_INT32)(sum >> 32)) | (OPJ_UINT32)sum;
96}
97
103{
104 return (a >= b) ? a - b : 0;
105}
106
118{
119 if (a < min) {
120 return min;
121 }
122 if (a > max) {
123 return max;
124 }
125 return a;
126}
127
139{
140 if (a < min) {
141 return min;
142 }
143 if (a > max) {
144 return max;
145 }
146 return a;
147}
148
153{
154 return a < 0 ? -a : a;
155}
161{
162 assert(b);
163 return (OPJ_INT32)(((OPJ_INT64)a + b - 1) / b);
164}
165
171{
172 assert(b);
173 return (OPJ_UINT32)(((OPJ_UINT64)a + b - 1) / b);
174}
175
181 OPJ_UINT64 b)
182{
183 assert(b);
184 return (OPJ_UINT32)((a + b - 1) / b);
185}
186
192{
193 return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
194}
195
201{
202 return (OPJ_INT32)((a + ((OPJ_INT64)1 << b) - 1) >> b);
203}
204
210{
211 return (OPJ_UINT32)((a + ((OPJ_UINT64)1U << b) - 1U) >> b);
212}
213
219{
220 return a >> b;
221}
222
228{
229 return a >> b;
230}
231
237{
238 OPJ_INT32 l;
239 for (l = 0; a > 1; l++) {
240 a >>= 1;
241 }
242 return l;
243}
249{
250 OPJ_UINT32 l;
251 for (l = 0; a > 1; ++l) {
252 a >>= 1;
253 }
254 return l;
255}
256
264{
265#if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
266 OPJ_INT64 temp = __emul(a, b);
267#else
268 OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
269#endif
270 temp += 4096;
271 assert((temp >> 13) <= (OPJ_INT64)0x7FFFFFFF);
272 assert((temp >> 13) >= (-(OPJ_INT64)0x7FFFFFFF - (OPJ_INT64)1));
273 return (OPJ_INT32)(temp >> 13);
274}
275
277{
278#if defined(_MSC_VER) && (_MSC_VER >= 1400) && !defined(__INTEL_COMPILER) && defined(_M_IX86)
279 OPJ_INT64 temp = __emul(a, b);
280#else
281 OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
282#endif
283 temp += 4096;
284 assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) <= (OPJ_INT64)0x7FFFFFFF);
285 assert((temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) >= (-(OPJ_INT64)0x7FFFFFFF -
286 (OPJ_INT64)1));
287 return (OPJ_INT32)(temp >> (13 + 11 - T1_NMSEDEC_FRACBITS)) ;
288}
289
298{
299 void* pa = &a;
300 void* pb = &b;
301 OPJ_UINT32* upa = (OPJ_UINT32*)pa;
302 OPJ_UINT32* upb = (OPJ_UINT32*)pb;
303 OPJ_UINT32 ures = *upa + *upb;
304 void* pures = &ures;
305 OPJ_INT32* ipres = (OPJ_INT32*)pures;
306 return *ipres;
307}
308
317{
318 void* pa = &a;
319 void* pb = &b;
320 OPJ_UINT32* upa = (OPJ_UINT32*)pa;
321 OPJ_UINT32* upb = (OPJ_UINT32*)pb;
322 OPJ_UINT32 ures = *upa - *upb;
323 void* pures = &ures;
324 OPJ_INT32* ipres = (OPJ_INT32*)pures;
325 return *ipres;
326}
327
328/* ----------------------------------------------------------------------- */
332
333#endif /* OPJ_INTMATH_H */
Byte4_t min(Byte4_t n1, Byte4_t n2)
Definition index_manager.c:783
Byte4_t max(Byte4_t n1, Byte4_t n2)
Definition index_manager.c:774
#define INLINE
Definition openjpeg.h:65
int32_t OPJ_INT32
Definition openjpeg.h:131
uint32_t OPJ_UINT32
Definition openjpeg.h:132
int64_t OPJ_INT64
Definition openjpeg.h:133
uint64_t OPJ_UINT64
Definition openjpeg.h:134
static INLINE OPJ_UINT32 opj_uint_min(OPJ_UINT32 a, OPJ_UINT32 b)
Get the minimum of two integers.
Definition opj_intmath.h:65
static INLINE OPJ_INT64 opj_int64_clamp(OPJ_INT64 a, OPJ_INT64 min, OPJ_INT64 max)
Clamp an integer inside an interval.
Definition opj_intmath.h:137
static INLINE OPJ_UINT32 opj_uint_max(OPJ_UINT32 a, OPJ_UINT32 b)
Get the maximum of two integers.
Definition opj_intmath.h:83
static INLINE OPJ_INT32 opj_int_max(OPJ_INT32 a, OPJ_INT32 b)
Get the maximum of two integers.
Definition opj_intmath.h:74
static INLINE OPJ_INT32 opj_int_add_no_overflow(OPJ_INT32 a, OPJ_INT32 b)
Addition two signed integers with a wrap-around behaviour.
Definition opj_intmath.h:297
static INLINE OPJ_INT32 opj_int_sub_no_overflow(OPJ_INT32 a, OPJ_INT32 b)
Subtract two signed integers with a wrap-around behaviour.
Definition opj_intmath.h:316
static INLINE OPJ_INT32 opj_int_fix_mul_t1(OPJ_INT32 a, OPJ_INT32 b)
Definition opj_intmath.h:276
static INLINE OPJ_INT32 opj_int64_ceildivpow2(OPJ_INT64 a, OPJ_INT32 b)
Divide a 64bits integer by a power of 2 and round upwards.
Definition opj_intmath.h:200
static INLINE OPJ_UINT32 opj_uint_floordivpow2(OPJ_UINT32 a, OPJ_UINT32 b)
Divide an integer by a power of 2 and round downwards.
Definition opj_intmath.h:227
static INLINE OPJ_UINT32 opj_uint_floorlog2(OPJ_UINT32 a)
Get logarithm of an integer and round downwards.
Definition opj_intmath.h:248
static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b)
Multiply two fixed-precision rational numbers.
Definition opj_intmath.h:263
static INLINE OPJ_INT32 opj_int_floorlog2(OPJ_INT32 a)
Get logarithm of an integer and round downwards.
Definition opj_intmath.h:236
static INLINE OPJ_INT32 opj_int_ceildivpow2(OPJ_INT32 a, OPJ_INT32 b)
Divide an integer by a power of 2 and round upwards.
Definition opj_intmath.h:191
static INLINE OPJ_INT32 opj_int_min(OPJ_INT32 a, OPJ_INT32 b)
Get the minimum of two integers.
Definition opj_intmath.h:56
static INLINE OPJ_INT32 opj_int_ceildiv(OPJ_INT32 a, OPJ_INT32 b)
Divide an integer and round upwards.
Definition opj_intmath.h:160
static INLINE OPJ_UINT32 opj_uint_adds(OPJ_UINT32 a, OPJ_UINT32 b)
Get the saturated sum of two unsigned integers.
Definition opj_intmath.h:92
static INLINE OPJ_INT32 opj_int_floordivpow2(OPJ_INT32 a, OPJ_INT32 b)
Divide an integer by a power of 2 and round downwards.
Definition opj_intmath.h:218
static INLINE OPJ_UINT32 opj_uint64_ceildiv_res_uint32(OPJ_UINT64 a, OPJ_UINT64 b)
Divide an integer and round upwards.
Definition opj_intmath.h:180
static INLINE OPJ_INT32 opj_int_abs(OPJ_INT32 a)
Definition opj_intmath.h:152
static INLINE OPJ_UINT32 opj_uint_ceildiv(OPJ_UINT32 a, OPJ_UINT32 b)
Divide an integer and round upwards.
Definition opj_intmath.h:170
static INLINE OPJ_UINT32 opj_uint_ceildivpow2(OPJ_UINT32 a, OPJ_UINT32 b)
Divide an integer by a power of 2 and round upwards.
Definition opj_intmath.h:209
static INLINE OPJ_UINT32 opj_uint_subs(OPJ_UINT32 a, OPJ_UINT32 b)
Get the saturated difference of two unsigned integers.
Definition opj_intmath.h:102
static INLINE OPJ_INT32 opj_int_clamp(OPJ_INT32 a, OPJ_INT32 min, OPJ_INT32 max)
Clamp an integer inside an interval.
Definition opj_intmath.h:116
#define T1_NMSEDEC_FRACBITS
Definition t1.h:68