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/*
* integer_matrix.h
*
* A small integer matrix library
*
* Copyright © 2012-2021 Deutsches Elektronen-Synchrotron DESY,
* a research centre of the Helmholtz Association.
*
* Authors:
* 2012-2019 Thomas White <taw@physics.org>
*
* This file is part of CrystFEL.
*
* CrystFEL is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* CrystFEL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CrystFEL. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef INTEGER_MATRIX_H
#define INTEGER_MATRIX_H
/**
* \file integer_matrix.h
* Matrix type containing only integers
*/
/**
* The \p IntegerMatrix is an opaque data structure representing an integer matrix.
**/
typedef struct _integermatrix IntegerMatrix;
#include "rational.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Alloc/dealloc */
extern IntegerMatrix *intmat_new(unsigned int rows, unsigned int cols);
extern IntegerMatrix *intmat_copy(const IntegerMatrix *m);
extern IntegerMatrix *intmat_identity(int size);
extern void intmat_free(IntegerMatrix *m);
/* Get/set */
extern void intmat_size(const IntegerMatrix *m, unsigned int *rows,
unsigned int *cols);
extern void intmat_set(IntegerMatrix *m, unsigned int i, unsigned int j,
signed int v);
extern signed int intmat_get(const IntegerMatrix *m,
unsigned int i, unsigned int j);
extern void intmat_zero(IntegerMatrix *m);
extern IntegerMatrix *intmat_create_3x3(signed int m11, signed int m12, signed int m13,
signed int m21, signed int m22, signed int m23,
signed int m31, signed int m32, signed int m33);
/* Matrix-vector multiplication */
extern signed int *transform_indices(const IntegerMatrix *P, const signed int *hkl);
/* Matrix-matrix multiplication */
extern IntegerMatrix *intmat_times_intmat(const IntegerMatrix *a,
const IntegerMatrix *b);
/* Inverse */
extern IntegerMatrix *intmat_inverse(const IntegerMatrix *m);
/* Determinant */
extern signed int intmat_det(const IntegerMatrix *m);
/* Is identity? */
extern int intmat_is_identity(const IntegerMatrix *m);
/* Is inversion? */
extern int intmat_is_inversion(const IntegerMatrix *m);
/* Comparison */
extern int intmat_equals(const IntegerMatrix *a, const IntegerMatrix *b);
/* Diagnostics */
extern void intmat_print(const IntegerMatrix *m);
#ifdef __cplusplus
}
#endif
#endif /* INTEGER_MATRIX_H */
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