/* $Id: matrix.h,v 1.7 2002/07/18 14:59:02 ukai Exp $ */ /* * matrix.h, matrix.c: Liner equation solver using LU decomposition. * * by K.Okabe Aug. 1999 * * You can use,copy,modify and distribute this program without any permission. */ #ifndef _MATRIX_H #include <math.h> #include <string.h> /* * Types. */ struct matrix { double *me; int dim; }; struct vector { double *ve; int dim; }; typedef struct matrix *Matrix; typedef struct vector *Vector; /* * Macros. */ #define M_VAL(m,i,j) ((m)->me[(i)*(m)->dim +(j)]) #define V_VAL(v,i) ((v)->ve[i]) /* * Compatible macros with those in Meschach Library. */ #define m_entry(m,i,j) (M_VAL(m,i,j)) #define v_entry(v,i) (V_VAL(v,i)) #define m_copy(m1,m2) (bcopy((m1)->me,(m2)->me,(m1)->dim*(m1)->dim*sizeof(double))) #define v_free(v) ((v)=NULL) #define m_free(m) ((m)=NULL) #define px_free(px) ((px)=NULL) #define m_set_val(m,i,j,x) (M_VAL(m,i,j) = (x)) #define m_add_val(m,i,j,x) (M_VAL(m,i,j) += (x)) #define v_set_val(v,i,x) (V_VAL(v,i) = (x)) #define v_add_val(v,i,x) (V_VAL(v,i) += (x)) #define m_get(r,c) (new_matrix(r)) #define v_get(n) (new_vector(n)) #define px_get(n) (New_N(int,n)) typedef struct matrix MAT; typedef struct vector VEC; typedef int PERM; extern int LUfactor(Matrix, int *); extern Matrix m_inverse(Matrix, Matrix); extern Matrix LUinverse(Matrix, int *, Matrix); extern int LUsolve(Matrix, int *, Vector, Vector); extern int Lsolve(Matrix, Vector, Vector, double); extern int Usolve(Matrix, Vector, Vector, double); extern Matrix new_matrix(int); extern Vector new_vector(int); #define _MATRIX_H #endif /* _MATRIX_H */