134 lines
3.3 KiB
C
134 lines
3.3 KiB
C
/*
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* ANSI C implementation of vector operations.
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*
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* Copyright (c) 2007-2010 Naoaki Okazaki
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/* $Id$ */
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#include <stdlib.h>
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#include <memory.h>
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#if LBFGS_FLOAT == 32 && LBFGS_IEEE_FLOAT
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#define fsigndiff(x, y) (((*(uint32_t*)(x)) ^ (*(uint32_t*)(y))) & 0x80000000U)
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#else
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#define fsigndiff(x, y) (*(x) * (*(y) / fabs(*(y))) < 0.)
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#endif/*LBFGS_IEEE_FLOAT*/
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inline static void* vecalloc(size_t size)
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{
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void *memblock = malloc(size);
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if (memblock) {
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memset(memblock, 0, size);
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}
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return memblock;
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}
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inline static void vecfree(void *memblock)
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{
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free(memblock);
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}
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inline static void vecset(lbfgsfloatval_t *x, const lbfgsfloatval_t c, const int n)
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{
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int i;
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for (i = 0;i < n;++i) {
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x[i] = c;
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}
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}
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inline static void veccpy(lbfgsfloatval_t *y, const lbfgsfloatval_t *x, const int n)
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{
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int i;
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for (i = 0;i < n;++i) {
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y[i] = x[i];
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}
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}
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inline static void vecncpy(lbfgsfloatval_t *y, const lbfgsfloatval_t *x, const int n)
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{
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int i;
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for (i = 0;i < n;++i) {
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y[i] = -x[i];
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}
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}
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inline static void vecadd(lbfgsfloatval_t *y, const lbfgsfloatval_t *x, const lbfgsfloatval_t c, const int n)
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{
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int i;
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for (i = 0;i < n;++i) {
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y[i] += c * x[i];
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}
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}
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inline static void vecdiff(lbfgsfloatval_t *z, const lbfgsfloatval_t *x, const lbfgsfloatval_t *y, const int n)
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{
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int i;
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for (i = 0;i < n;++i) {
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z[i] = x[i] - y[i];
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}
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}
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inline static void vecscale(lbfgsfloatval_t *y, const lbfgsfloatval_t c, const int n)
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{
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int i;
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for (i = 0;i < n;++i) {
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y[i] *= c;
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}
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}
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inline static void vecmul(lbfgsfloatval_t *y, const lbfgsfloatval_t *x, const int n)
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{
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int i;
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for (i = 0;i < n;++i) {
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y[i] *= x[i];
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}
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}
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inline static void vecdot(lbfgsfloatval_t* s, const lbfgsfloatval_t *x, const lbfgsfloatval_t *y, const int n)
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{
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int i;
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*s = 0.;
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for (i = 0;i < n;++i) {
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*s += x[i] * y[i];
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}
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}
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inline static void vec2norm(lbfgsfloatval_t* s, const lbfgsfloatval_t *x, const int n)
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{
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vecdot(s, x, x, n);
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*s = (lbfgsfloatval_t)sqrt(*s);
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}
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inline static void vec2norminv(lbfgsfloatval_t* s, const lbfgsfloatval_t *x, const int n)
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{
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vec2norm(s, x, n);
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*s = (lbfgsfloatval_t)(1.0 / *s);
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}
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