SuperLU_DIST  4.0
superlu_dist on CPU and GPU clusters
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Functions
dreadhb.c File Reference

Read a DOUBLE PRECISION matrix stored in Harwell-Boeing format. More...

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "superlu_ddefs.h"

Functions

void FormFullA (int_t, int_t *, double **, int_t **, int_t **)
 
void dreadhb_dist (int iam, FILE *fp, int_t *nrow, int_t *ncol, int_t *nonz, double **nzval, int_t **rowind, int_t **colptr)
 

Detailed Description

Read a DOUBLE PRECISION matrix stored in Harwell-Boeing format.

– Distributed SuperLU routine (version 1.0) –
Lawrence Berkeley National Lab, Univ. of California Berkeley.
September 1, 1999

Function Documentation

void dreadhb_dist ( int  iam,
FILE *  fp,
int_t nrow,
int_t ncol,
int_t nonz,
double **  nzval,
int_t **  rowind,
int_t **  colptr 
)

Purpose

Read a DOUBLE PRECISION matrix stored in Harwell-Boeing format 
as described below.
Line 1 (A72,A8) 
    Col. 1 - 72   Title (TITLE) 
 Col. 73 - 80  Key (KEY)
Line 2 (5I14) 
    Col. 1 - 14   Total number of lines excluding header (TOTCRD) 
    Col. 15 - 28  Number of lines for pointers (PTRCRD) 
    Col. 29 - 42  Number of lines for row (or variable) indices (INDCRD) 
    Col. 43 - 56  Number of lines for numerical values (VALCRD) 
 Col. 57 - 70  Number of lines for right-hand sides (RHSCRD) 
                   (including starting guesses and solution vectors 
           if present) 
                  (zero indicates no right-hand side data is present)
Line 3 (A3, 11X, 4I14) 
    Col. 1 - 3    Matrix type (see below) (MXTYPE) 
    Col. 15 - 28  Number of rows (or variables) (NROW) 
    Col. 29 - 42  Number of columns (or elements) (NCOL) 
 Col. 43 - 56  Number of row (or variable) indices (NNZERO) 
               (equal to number of entries for assembled matrices) 
    Col. 57 - 70  Number of elemental matrix entries (NELTVL) 
               (zero in the case of assembled matrices) 
Line 4 (2A16, 2A20) 
    Col. 1 - 16   Format for pointers (PTRFMT) 
 Col. 17 - 32  Format for row (or variable) indices (INDFMT) 
 Col. 33 - 52  Format for numerical values of coefficient matrix (VALFMT) 
    Col. 53 - 72 Format for numerical values of right-hand sides (RHSFMT)
Line 5 (A3, 11X, 2I14) Only present if there are right-hand sides present 
    Col. 1        Right-hand side type: 
              F for full storage or M for same format as matrix 
    Col. 2        G if a starting vector(s) (Guess) is supplied. (RHSTYP) 
    Col. 3        X if an exact solution vector(s) is supplied. 
 Col. 15 - 28  Number of right-hand sides (NRHS) 
 Col. 29 - 42  Number of row indices (NRHSIX) 
                  (ignored in case of unassembled matrices)
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 
 P Pattern only (no numerical values supplied)
Second Character: 
 S Symmetric 
 U Unsymmetric 
 H Hermitian 
 Z Skew symmetric 
 R Rectangular
Third Character: 
 A Assembled 
 E Elemental matrices (unassembled) 
void FormFullA ( int_t  n,
int_t nonz,
double **  nzval,
int_t **  rowind,
int_t **  colptr 
)
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.