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