/*  -- translated by f2c (version 20191129).

   You must link the resulting object file with libf2c:

  on Microsoft Windows system, link with libf2c.lib;

  on Linux or Unix systems, link with .../path/to/libf2c.a -lm

  or, if you install libf2c.a in a standard place, with -lf2c -lm

  -- in that order, at the end of the command line, as in

    cc *.o -lf2c -lm

  Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,

    http://www.netlib.org/f2c/libf2c.zip

*/

#include "f2c.h"

/* > \brief \b DLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given val

ues.   

    =========== DOCUMENTATION ===========   

   Online html documentation available at   

              http://www.netlib.org/lapack/explore-html/   

   > \htmlonly   

   > Download DLASET + dependencies   

   > <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlaset.

f">   

   > [TGZ]</a>   

   > <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlaset.

f">   

   > [ZIP]</a>   

   > <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlaset.

f">   

   > [TXT]</a>   

   > \endhtmlonly   

    Definition:   

    ===========   

         SUBROUTINE DLASET( UPLO, M, N, ALPHA, BETA, A, LDA )   

         CHARACTER          UPLO   

         INTEGER            LDA, M, N   

         DOUBLE PRECISION   ALPHA, BETA   

         DOUBLE PRECISION   A( LDA, * )   

   > \par Purpose:   

    =============   

   >   

   > \verbatim   

   >   

   > DLASET initializes an m-by-n matrix A to BETA on the diagonal and   

   > ALPHA on the offdiagonals.   

   > \endverbatim   

    Arguments:   

    ==========   

   > \param[in] UPLO   

   > \verbatim   

   >          UPLO is CHARACTER*1   

   >          Specifies the part of the matrix A to be set.   

   >          = 'U':      Upper triangular part is set; the strictly lower   

   >                      triangular part of A is not changed.   

   >          = 'L':      Lower triangular part is set; the strictly upper   

   >                      triangular part of A is not changed.   

   >          Otherwise:  All of the matrix A is set.   

   > \endverbatim   

   >   

   > \param[in] M   

   > \verbatim   

   >          M is INTEGER   

   >          The number of rows of the matrix A.  M >= 0.   

   > \endverbatim   

   >   

   > \param[in] N   

   > \verbatim   

   >          N is INTEGER   

   >          The number of columns of the matrix A.  N >= 0.   

   > \endverbatim   

   >   

   > \param[in] ALPHA   

   > \verbatim   

   >          ALPHA is DOUBLE PRECISION   

   >          The constant to which the offdiagonal elements are to be set.   

   > \endverbatim   

   >   

   > \param[in] BETA   

   > \verbatim   

   >          BETA is DOUBLE PRECISION   

   >          The constant to which the diagonal elements are to be set.   

   > \endverbatim   

   >   

   > \param[in,out] A   

   > \verbatim   

   >          A is DOUBLE PRECISION array, dimension (LDA,N)   

   >          On exit, the leading m-by-n submatrix of A is set as follows:   

   >   

   >          if UPLO = 'U', A(i,j) = ALPHA, 1<=i<=j-1, 1<=j<=n,   

   >          if UPLO = 'L', A(i,j) = ALPHA, j+1<=i<=m, 1<=j<=n,   

   >          otherwise,     A(i,j) = ALPHA, 1<=i<=m, 1<=j<=n, i.ne.j,   

   >   

   >          and, for all UPLO, A(i,i) = BETA, 1<=i<=min(m,n).   

   > \endverbatim   

   >   

   > \param[in] LDA   

   > \verbatim   

   >          LDA is INTEGER   

   >          The leading dimension of the array A.  LDA >= max(1,M).   

   > \endverbatim   

    Authors:   

    ========   

   > \author Univ. of Tennessee   

   > \author Univ. of California Berkeley   

   > \author Univ. of Colorado Denver   

   > \author NAG Ltd.   

   > \date September 2012   

   > \ingroup auxOTHERauxiliary   

    =====================================================================   

   Subroutine */ int igraphdlaset_(char *uplo, integer *m, integer *n, doublereal *

  alpha, doublereal *beta, doublereal *a, integer *lda)

{

    /* System generated locals */

    integer a_dim1, a_offset, i__1, i__2, i__3;

    /* Local variables */

    integer i__, j;

    extern logical igraphlsame_(char *, char *);

/*  -- LAPACK auxiliary routine (version 3.4.2) --   

    -- LAPACK is a software package provided by Univ. of Tennessee,    --   

    -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--   

       September 2012   

   =====================================================================   

       Parameter adjustments */

    a_dim1 = *lda;

    a_offset = 1 + a_dim1;

    a -= a_offset;

    /* Function Body */

    if (igraphlsame_(uplo, "U")) {

/*        Set the strictly upper triangular or trapezoidal part of the   

          array to ALPHA. */

  i__1 = *n;

  for (j = 2; j <= i__1; ++j) {

/* Computing MIN */

      i__3 = j - 1;

      i__2 = min(i__3,*m);

      for (i__ = 1; i__ <= i__2; ++i__) {

    a[i__ + j * a_dim1] = *alpha;

/* L10: */

      }

/* L20: */

  }

    } else if (igraphlsame_(uplo, "L")) {

/*        Set the strictly lower triangular or trapezoidal part of the   

          array to ALPHA. */

  i__1 = min(*m,*n);

  for (j = 1; j <= i__1; ++j) {

      i__2 = *m;

      for (i__ = j + 1; i__ <= i__2; ++i__) {

    a[i__ + j * a_dim1] = *alpha;

/* L30: */

      }

/* L40: */

  }

    } else {

/*        Set the leading m-by-n submatrix to ALPHA. */

  i__1 = *n;

  for (j = 1; j <= i__1; ++j) {

      i__2 = *m;

      for (i__ = 1; i__ <= i__2; ++i__) {

    a[i__ + j * a_dim1] = *alpha;

/* L50: */

      }

/* L60: */

  }

    }

/*     Set the first min(M,N) diagonal elements to BETA. */

    i__1 = min(*m,*n);

    for (i__ = 1; i__ <= i__1; ++i__) {

  a[i__ + i__ * a_dim1] = *beta;

/* L70: */

    }

    return 0;

/*     End of DLASET */

} /* igraphdlaset_ */