Add graph references
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Abdelrahman Said
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/* -- translated by f2c (version 20240504).
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You must link the resulting object file with libf2c:
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on Microsoft Windows system, link with libf2c.lib;
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on Linux or Unix systems, link with .../path/to/libf2c.a -lm
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or, if you install libf2c.a in a standard place, with -lf2c -lm
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-- in that order, at the end of the command line, as in
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cc *.o -lf2c -lm
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Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,
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http://www.netlib.org/f2c/libf2c.zip
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*/
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#include "f2c.h"
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/* > \brief \b DLASWP performs a series of row interchanges on a general rectangular matrix.
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=========== DOCUMENTATION ===========
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Online html documentation available at
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http://www.netlib.org/lapack/explore-html/
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> \htmlonly
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> Download DLASWP + dependencies
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> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlaswp.
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f">
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> [TGZ]</a>
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> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlaswp.
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f">
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> [ZIP]</a>
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> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlaswp.
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f">
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> [TXT]</a>
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> \endhtmlonly
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Definition:
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===========
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SUBROUTINE DLASWP( N, A, LDA, K1, K2, IPIV, INCX )
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INTEGER INCX, K1, K2, LDA, N
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INTEGER IPIV( * )
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DOUBLE PRECISION A( LDA, * )
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> \par Purpose:
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=============
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>
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> \verbatim
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>
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> DLASWP performs a series of row interchanges on the matrix A.
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> One row interchange is initiated for each of rows K1 through K2 of A.
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> \endverbatim
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Arguments:
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==========
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> \param[in] N
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> \verbatim
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> N is INTEGER
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> The number of columns of the matrix A.
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> \endverbatim
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>
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> \param[in,out] A
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> \verbatim
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> A is DOUBLE PRECISION array, dimension (LDA,N)
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> On entry, the matrix of column dimension N to which the row
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> interchanges will be applied.
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> On exit, the permuted matrix.
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> \endverbatim
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>
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> \param[in] LDA
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> \verbatim
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> LDA is INTEGER
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> The leading dimension of the array A.
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> \endverbatim
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>
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> \param[in] K1
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> \verbatim
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> K1 is INTEGER
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> The first element of IPIV for which a row interchange will
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> be done.
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> \endverbatim
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>
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> \param[in] K2
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> \verbatim
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> K2 is INTEGER
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> The last element of IPIV for which a row interchange will
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> be done.
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> \endverbatim
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>
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> \param[in] IPIV
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> \verbatim
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> IPIV is INTEGER array, dimension (K2*abs(INCX))
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> The vector of pivot indices. Only the elements in positions
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> K1 through K2 of IPIV are accessed.
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> IPIV(K) = L implies rows K and L are to be interchanged.
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> \endverbatim
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>
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> \param[in] INCX
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> \verbatim
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> INCX is INTEGER
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> The increment between successive values of IPIV. If IPIV
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> is negative, the pivots are applied in reverse order.
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> \endverbatim
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Authors:
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========
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> \author Univ. of Tennessee
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> \author Univ. of California Berkeley
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> \author Univ. of Colorado Denver
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> \author NAG Ltd.
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> \date September 2012
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> \ingroup doubleOTHERauxiliary
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> \par Further Details:
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=====================
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>
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> \verbatim
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>
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> Modified by
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> R. C. Whaley, Computer Science Dept., Univ. of Tenn., Knoxville, USA
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> \endverbatim
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>
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=====================================================================
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Subroutine */ int igraphdlaswp_(integer *n, doublereal *a, integer *lda, integer
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*k1, integer *k2, integer *ipiv, integer *incx)
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{
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/* System generated locals */
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integer a_dim1, a_offset, i__1, i__2, i__3, i__4;
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/* Local variables */
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integer i__, j, k, i1, i2, n32, ip, ix, ix0, inc;
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doublereal temp;
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/* -- LAPACK auxiliary routine (version 3.4.2) --
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-- LAPACK is a software package provided by Univ. of Tennessee, --
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-- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
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September 2012
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=====================================================================
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Interchange row I with row IPIV(I) for each of rows K1 through K2.
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Parameter adjustments */
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a_dim1 = *lda;
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a_offset = 1 + a_dim1;
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a -= a_offset;
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--ipiv;
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/* Function Body */
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if (*incx > 0) {
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ix0 = *k1;
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i1 = *k1;
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i2 = *k2;
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inc = 1;
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} else if (*incx < 0) {
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ix0 = (1 - *k2) * *incx + 1;
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i1 = *k2;
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i2 = *k1;
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inc = -1;
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} else {
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return 0;
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}
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n32 = *n / 32 << 5;
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if (n32 != 0) {
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i__1 = n32;
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for (j = 1; j <= i__1; j += 32) {
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ix = ix0;
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i__2 = i2;
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i__3 = inc;
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for (i__ = i1; i__3 < 0 ? i__ >= i__2 : i__ <= i__2; i__ += i__3)
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{
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ip = ipiv[ix];
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if (ip != i__) {
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i__4 = j + 31;
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for (k = j; k <= i__4; ++k) {
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temp = a[i__ + k * a_dim1];
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a[i__ + k * a_dim1] = a[ip + k * a_dim1];
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a[ip + k * a_dim1] = temp;
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/* L10: */
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}
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}
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ix += *incx;
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/* L20: */
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}
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/* L30: */
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}
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}
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if (n32 != *n) {
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++n32;
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ix = ix0;
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i__1 = i2;
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i__3 = inc;
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for (i__ = i1; i__3 < 0 ? i__ >= i__1 : i__ <= i__1; i__ += i__3) {
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ip = ipiv[ix];
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if (ip != i__) {
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i__2 = *n;
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for (k = n32; k <= i__2; ++k) {
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temp = a[i__ + k * a_dim1];
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a[i__ + k * a_dim1] = a[ip + k * a_dim1];
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a[ip + k * a_dim1] = temp;
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/* L40: */
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}
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}
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ix += *incx;
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/* L50: */
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}
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}
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return 0;
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/* End of DLASWP */
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} /* igraphdlaswp_ */
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