70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/*
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* matrix.h, matrix.c: Liner equation solver using LU decomposition.
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* $Id: matrix.h,v 1.4 2001/11/22 14:07:38 ukai Exp $
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*
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* by K.Okabe Aug. 1999
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*
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* You can use,copy,modify and distribute this program without any permission.
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*/
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#ifndef _MATRIX_H
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#include <math.h>
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#include <string.h>
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/*
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* Types.
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*/
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struct matrix {
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double *me;
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int dim;
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};
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struct vector {
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double *ve;
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int dim;
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};
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typedef struct matrix *Matrix;
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typedef struct vector *Vector;
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/*
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* Macros.
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*/
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#define M_VAL(m,i,j) ((m)->me[(i)*(m)->dim +(j)])
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#define V_VAL(v,i) ((v)->ve[i])
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/*
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* Compatible macros with those in Meschach Library.
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*/
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#define m_entry(m,i,j) (M_VAL(m,i,j))
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#define v_entry(v,i) (V_VAL(v,i))
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#define m_copy(m1,m2) (bcopy((m1)->me,(m2)->me,(m1)->dim*(m1)->dim*sizeof(double)))
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#define v_free(v) ((v)=NULL)
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#define m_free(m) ((m)=NULL)
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#define px_free(px) ((px)=NULL)
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#define m_set_val(m,i,j,x) (M_VAL(m,i,j) = (x))
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#define m_add_val(m,i,j,x) (M_VAL(m,i,j) += (x))
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#define v_set_val(v,i,x) (V_VAL(v,i) = (x))
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#define v_add_val(v,i,x) (V_VAL(v,i) += (x))
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#define m_get(r,c) (new_matrix(r))
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#define v_get(n) (new_vector(n))
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#define px_get(n) (New_N(int,n))
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typedef struct matrix MAT;
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typedef struct vector VEC;
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typedef int PERM;
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extern int LUfactor(Matrix, int *);
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extern Matrix m_inverse(Matrix, Matrix);
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extern Matrix LUinverse(Matrix, int *, Matrix);
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extern int LUsolve(Matrix, int *, Vector, Vector);
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extern int Lsolve(Matrix, Vector, Vector, double);
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extern int Usolve(Matrix, Vector, Vector, double);
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extern Matrix new_matrix(int);
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extern Vector new_vector(int);
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#define _MATRIX_H
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#endif /* _MATRIX_H */
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