Initial revision

matrix.h

@@ -0,0 +1,73 @@
+/* 
+ * matrix.h, matrix.c: Liner equation solver using LU decomposition.
+ * $Id: matrix.h,v 1.1 2001/11/08 05:15:21 a-ito Exp $
+ * 
+ * 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))
+#ifdef __CYGWIN__
+#define m_copy(m1,m2) (bcopy((const char *)(m1)->me,(char *)(m2)->me,(m1)->dim*(m1)->dim*sizeof(double)))
+#else				/* not __CYGWIN__ */
+#define m_copy(m1,m2) (bcopy((m1)->me,(m2)->me,(m1)->dim*(m1)->dim*sizeof(double)))
+#endif				/* not __CYGWIN__ */
+#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 */