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/* ../netlib/zlag2c.f -- translated by f2c (version 20100827). 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 "FLA_f2c.h" /* > \brief \b ZLAG2C converts a complex double precision matrix to a complex single precision matrix. */
/* =========== DOCUMENTATION =========== */
/* Online html documentation available at */
/* http://www.netlib.org/lapack/explore-html/ */
/* > \htmlonly */
/* > Download ZLAG2C + dependencies */
/* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zlag2c. f"> */
/* > [TGZ]</a> */
/* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zlag2c. f"> */
/* > [ZIP]</a> */
/* > <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zlag2c. f"> */
/* > [TXT]</a> */
/* > \endhtmlonly */
/* Definition: */
/* =========== */
/* SUBROUTINE ZLAG2C( M, N, A, LDA, SA, LDSA, INFO ) */
/* .. Scalar Arguments .. */
/* INTEGER INFO, LDA, LDSA, M, N */
/* .. */
/* .. Array Arguments .. */
/* COMPLEX SA( LDSA, * ) */
/* COMPLEX*16 A( LDA, * ) */
/* .. */
/* > \par Purpose: */
/* ============= */
/* > */
/* > \verbatim */
/* > */
/* > ZLAG2C converts a COMPLEX*16 matrix, SA, to a COMPLEX matrix, A. */
/* > */
/* > RMAX is the overflow for the SINGLE PRECISION arithmetic */
/* > ZLAG2C checks that all the entries of A are between -RMAX and */
/* > RMAX. If not the convertion is aborted and a flag is raised. */
/* > */
/* > This is an auxiliary routine so there is no argument checking. */
/* > \endverbatim */
/* Arguments: */
/* ========== */
/* > \param[in] M */
/* > \verbatim */
/* > M is INTEGER */
/* > The number of lines 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] A */
/* > \verbatim */
/* > A is COMPLEX*16 array, dimension (LDA,N) */
/* > On entry, the M-by-N coefficient matrix A. */
/* > \endverbatim */
/* > */
/* > \param[in] LDA */
/* > \verbatim */
/* > LDA is INTEGER */
/* > The leading dimension of the array A. LDA >= max(1,M). */
/* > \endverbatim */
/* > */
/* > \param[out] SA */
/* > \verbatim */
/* > SA is COMPLEX array, dimension (LDSA,N) */
/* > On exit, if INFO=0, the M-by-N coefficient matrix SA;
if */
/* > INFO>0, the content of SA is unspecified. */
/* > \endverbatim */
/* > */
/* > \param[in] LDSA */
/* > \verbatim */
/* > LDSA is INTEGER */
/* > The leading dimension of the array SA. LDSA >= max(1,M). */
/* > \endverbatim */
/* > */
/* > \param[out] INFO */
/* > \verbatim */
/* > INFO is INTEGER */
/* > = 0: successful exit. */
/* > = 1: an entry of the matrix A is greater than the SINGLE */
/* > PRECISION overflow threshold, in this case, the content */
/* > of SA in exit is unspecified. */
/* > \endverbatim */
/* Authors: */
/* ======== */
/* > \author Univ. of Tennessee */
/* > \author Univ. of California Berkeley */
/* > \author Univ. of Colorado Denver */
/* > \author NAG Ltd. */
/* > \date September 2012 */
/* > \ingroup complex16OTHERauxiliary */
/* ===================================================================== */
/* Subroutine */
int zlag2c_(integer *m, integer *n, doublecomplex *a, integer *lda, complex *sa, integer *ldsa, integer *info)
{
/* System generated locals */
integer sa_dim1, sa_offset, a_dim1, a_offset, i__1, i__2, i__3, i__4;
/* Builtin functions */
double d_imag(doublecomplex *);
/* Local variables */
integer i__, j;
doublereal rmax;
extern real slamch_(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 */
/* .. Scalar Arguments .. */
/* .. */
/* .. Array Arguments .. */
/* .. */
/* ===================================================================== */
/* .. Local Scalars .. */
/* .. */
/* .. Intrinsic Functions .. */
/* .. */
/* .. External Functions .. */
/* .. */
/* .. Executable Statements .. */
/* Parameter adjustments */
a_dim1 = *lda;
a_offset = 1 + a_dim1;
a -= a_offset;
sa_dim1 = *ldsa;
sa_offset = 1 + sa_dim1;
sa -= sa_offset;
/* Function Body */
rmax = slamch_("O");
i__1 = *n;
for (j = 1;
j <= i__1;
++j)
{
i__2 = *m;
for (i__ = 1;
i__ <= i__2;
++i__)
{
i__3 = i__ + j * a_dim1;
i__4 = i__ + j * a_dim1;
if (a[i__3].r < -rmax || a[i__4].r > rmax || d_imag(&a[i__ + j * a_dim1]) < -rmax || d_imag(&a[i__ + j * a_dim1]) > rmax)
{
*info = 1;
goto L30;
}
i__3 = i__ + j * sa_dim1;
i__4 = i__ + j * a_dim1;
sa[i__3].r = a[i__4].r;
sa[i__3].i = a[i__4].i; // , expr subst
/* L10: */
}
/* L20: */
}
*info = 0;
L30:
return 0;
/* End of ZLAG2C */
}
/* zlag2c_ */
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