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// Copyright (C) 2003--2004 Ronan Collobert (collober@idiap.ch)
//
// This file is part of Torch 3.1.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "Mat.h"
namespace Torch {
Mat::Mat(real ** ptr_, int n_rows, int n_cols)
{
ptr = ptr_;
m = n_rows;
n = n_cols;
base = NULL;
}
Mat::Mat(real * ptr_, int n_rows, int n_cols)
{
m = n_rows;
n = n_cols;
base = NULL;
ptr = (real **)allocator->alloc(sizeof(real *) * m);
for (int i = 0; i < m; i++)
ptr[i] = ptr_ + i * n;
}
Mat::Mat(int n_rows, int n_cols)
{
m = n_rows;
n = n_cols;
base = (real *)allocator->alloc(sizeof(real) * m * n);
ptr = (real **)allocator->alloc(sizeof(real *) * m);
for (int i = 0; i < m; i++)
ptr[i] = base + i * n;
}
void Mat::copy(Mat * mat)
{
if (mat == this)
return;
for (int i = 0; i < m; i++)
{
real *ptr_r = mat->ptr[i];
real *ptr_w = ptr[i];
for (int j = 0; j < n; j++)
*ptr_w++ = *ptr_r++;
}
}
void Mat::zero()
{
for (int i = 0; i < m; i++)
{
real *ptr_w = ptr[i];
for (int j = 0; j < n; j++)
*ptr_w++ = 0.;
}
}
real Mat::norm1()
{
real max_val = 0.;
for (int j = 0; j < n; j++)
{
real sum = 0.0;
for (int i = 0; i < m; i++)
sum += fabs(ptr[i][j]);
if (max_val < sum)
max_val = sum;
}
return max_val;
}
real Mat::normFrobenius()
{
real sum = 0.;
for (int i = 0; i < m; i++)
{
real *ptr_x = ptr[i];
for (int j = 0; j < n; j++)
{
real z = *ptr_x++;
sum += z * z;
}
}
return sqrt(sum);
}
real Mat::normInf()
{
real max_val = 0.;
for (int i = 0; i < m; i++)
{
real sum = 0.0;
real *ptr_x = ptr[i];
for (int j = 0; j < n; j++)
sum += fabs(*ptr_x++);
if (max_val < sum)
max_val = sum;
}
return max_val;
}
Vec *Mat::getRow(int row, Vec * vec)
{
if (!vec)
vec = new Vec(n);
real *ptr_w = vec->ptr;
real *ptr_r = ptr[row];
for (int i = 0; i < n; i++)
*ptr_w++ = *ptr_r++;
return (vec);
}
Vec *Mat::getCol(int col, Vec * vec)
{
if (!vec)
vec = new Vec(m);
real *ptr_w = vec->ptr;
for (int i = 0; i < m; i++)
*ptr_w++ = ptr[i][col];
return (vec);
}
void Mat::setRow(int row, Vec * vec)
{
real *ptr_w = ptr[row];
real *ptr_r = vec->ptr;
for (int i = 0; i < n; i++)
*ptr_w++ = *ptr_r++;
}
void Mat::setCol(int col, Vec * vec)
{
real *ptr_r = vec->ptr;
for (int i = 0; i < m; i++)
ptr[i][col] = *ptr_r++;
}
Mat *Mat::subMat(int row1, int col1, int row2, int col2)
{
real **ptr_ = (real **)Allocator::sysAlloc(sizeof(real *) * (row2 - row1 + 1));
for (int i = row1; i <= row2; i++)
ptr_[i - row1] = &ptr[i][col1];
Mat *mat = new Mat(ptr_, row2 - row1 + 1, col2 - col1 + 1);
mat->allocator->retain(ptr_);
return (mat);
}
Mat::~Mat()
{
}
}
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