lsd_mkb/lsd_mkb_superlu/superlu_seq/sreadhb.c File Reference

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

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

Include dependency graph for sreadhb.c:

Functions
int	sDumpLine (FILE *fp)
	Eat up the rest of the current line.
int	sParseIntFormat (char *buf, int *num, int *size)
int	sParseFloatFormat (char *buf, int *num, int *size)
int	sReadValues (FILE *fp, int n, float *destination, int perline, int persize)
void	sreadhb (FILE *fp, int *nrow, int *ncol, int *nonz, float **nzval, int **rowind, int **colptr)
	Auxiliary routines.

---

Detailed Description

Read a matrix stored in Harwell-Boeing format.

 -- SuperLU routine (version 2.0) --
 Univ. of California Berkeley, Xerox Palo Alto Research Center,
 and Lawrence Berkeley National Lab.
 November 15, 1997

 Purpose
 =======

 Read a FLOAT 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)

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Function Documentation

int sDumpLine

(

FILE *

fp

)

Eat up the rest of the current line.

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int sParseFloatFormat	(	char *	buf,
		int *	num,
		int *	size
	)

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int sParseIntFormat	(	char *	buf,
		int *	num,
		int *	size
	)

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void sreadhb	(	FILE *	fp,
		int *	nrow,
		int *	ncol,
		int *	nonz,
		float **	nzval,
		int **	rowind,
		int **	colptr
	)

Auxiliary routines.

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int sReadValues	(	FILE *	fp,
		int	n,
		float *	destination,
		int	perline,
		int	persize
	)

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