dreadrb.c File Reference

Read a matrix stored in Rutherford-Boeing format. More...

#include <stdio.h>
#include <stdlib.h>
#include "slu_ddefs.h"

Include dependency graph for dreadrb.c:

Functions
static int	dDumpLine (FILE *fp)
	Eat up the rest of the current line. More...
static int	dParseIntFormat (char *buf, int *num, int *size)
static int	dParseFloatFormat (char *buf, int *num, int *size)
static int	ReadVector (FILE *fp, int n, int *where, int perline, int persize)
static int	dReadValues (FILE *fp, int n, double *destination, int perline, int persize)
static void	FormFullA (int n, int *nonz, double **nzval, int **rowind, int **colptr)
void	dreadrb (int *nrow, int *ncol, int *nonz, double **nzval, int **rowind, int **colptr)

Detailed Description

Copyright (c) 2003, The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from U.S. Dept. of Energy)

All rights reserved.

The source code is distributed under BSD license, see the file License.txt at the top-level directory.

-- SuperLU routine (version 4.0) --
Lawrence Berkeley National Laboratory.
June 30, 2009

Purpose

Read a DOUBLE PRECISION matrix stored in Rutherford-Boeing format as described below.

Line 1 (A72, A8) Col. 1 - 72 Title (TITLE) Col. 73 - 80 Matrix name / identifier (MTRXID)

Line 2 (I14, 3(1X, I13)) Col. 1 - 14 Total number of lines excluding header (TOTCRD) Col. 16 - 28 Number of lines for pointers (PTRCRD) Col. 30 - 42 Number of lines for row (or variable) indices (INDCRD) Col. 44 - 56 Number of lines for numerical values (VALCRD)

Line 3 (A3, 11X, 4(1X, I13)) Col. 1 - 3 Matrix type (see below) (MXTYPE) Col. 15 - 28 Compressed Column: Number of rows (NROW) Elemental: Largest integer used to index variable (MVAR) Col. 30 - 42 Compressed Column: Number of columns (NCOL) Elemental: Number of element matrices (NELT) Col. 44 - 56 Compressed Column: Number of entries (NNZERO) Elemental: Number of variable indeces (NVARIX) Col. 58 - 70 Compressed Column: Unused, explicitly zero Elemental: Number of elemental matrix entries (NELTVL)

Line 4 (2A16, A20) Col. 1 - 16 Fortran format for pointers (PTRFMT) Col. 17 - 32 Fortran format for row (or variable) indices (INDFMT) Col. 33 - 52 Fortran format for numerical values of coefficient matrix (VALFMT) (blank in the case of matrix patterns)

The three character type field on line 3 describes the matrix type. The following table lists the permitted values for each of the three characters. As an example of the type field, RSA denotes that the matrix is real, symmetric, and assembled.

First Character: R Real matrix C Complex matrix I integer matrix P Pattern only (no numerical values supplied) Q Pattern only (numerical values supplied in associated auxiliary value file)

Second Character: S Symmetric U Unsymmetric H Hermitian Z Skew symmetric R Rectangular

Third Character: A Compressed column form E Elemental form

Function Documentation

static int dDumpLine ( FILE *  fp )

static

static int dParseFloatFormat ( char *  buf, int *  num, int *  size  )

static

static int dParseIntFormat ( char *  buf, int *  num, int *  size  )

static

void dreadrb	(	int *	nrow,
		int *	ncol,
		int *	nonz,
		double **	nzval,
		int **	rowind,
		int **	colptr
	)

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static int dReadValues ( FILE *  fp, int  n, double *  destination, int  perline, int  persize  )

static

static void FormFullA ( int  n, int *  nonz, double **  nzval, int **  rowind, int **  colptr  )

static

On input, nonz/nzval/rowind/colptr represents lower part of a symmetric
matrix. On exit, it represents the full matrix with lower and upper parts.

static int ReadVector ( FILE *  fp, int  n, int *  where, int  perline, int  persize  )

static