lapacke_dsteqr.c
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00001 /*****************************************************************************
00002   Copyright (c) 2010, Intel Corp.
00003   All rights reserved.
00004 
00005   Redistribution and use in source and binary forms, with or without
00006   modification, are permitted provided that the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice,
00009       this list of conditions and the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright
00011       notice, this list of conditions and the following disclaimer in the
00012       documentation and/or other materials provided with the distribution.
00013     * Neither the name of Intel Corporation nor the names of its contributors
00014       may be used to endorse or promote products derived from this software
00015       without specific prior written permission.
00016 
00017   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00018   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00021   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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00023   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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00025   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00026   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
00027   THE POSSIBILITY OF SUCH DAMAGE.
00028 ******************************************************************************
00029 * Contents: Native high-level C interface to LAPACK function dsteqr
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_dsteqr( int matrix_order, char compz, lapack_int n,
00038                            double* d, double* e, double* z, lapack_int ldz )
00039 {
00040     lapack_int info = 0;
00041     /* Additional scalars declarations for work arrays */
00042     lapack_int lwork;
00043     double* work = NULL;
00044     if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
00045         LAPACKE_xerbla( "LAPACKE_dsteqr", -1 );
00046         return -1;
00047     }
00048 #ifndef LAPACK_DISABLE_NAN_CHECK
00049     /* Optionally check input matrices for NaNs */
00050     if( LAPACKE_d_nancheck( n, d, 1 ) ) {
00051         return -4;
00052     }
00053     if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
00054         return -5;
00055     }
00056     if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
00057         if( LAPACKE_dge_nancheck( matrix_order, n, n, z, ldz ) ) {
00058             return -6;
00059         }
00060     }
00061 #endif
00062     /* Additional scalars initializations for work arrays */
00063     if( LAPACKE_lsame( compz, 'n' ) ) {
00064         lwork = 1;
00065     } else {
00066         lwork = MAX(1,2*n-2);
00067     }
00068     /* Allocate memory for working array(s) */
00069     work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
00070     if( work == NULL ) {
00071         info = LAPACK_WORK_MEMORY_ERROR;
00072         goto exit_level_0;
00073     }
00074     /* Call middle-level interface */
00075     info = LAPACKE_dsteqr_work( matrix_order, compz, n, d, e, z, ldz, work );
00076     /* Release memory and exit */
00077     LAPACKE_free( work );
00078 exit_level_0:
00079     if( info == LAPACK_WORK_MEMORY_ERROR ) {
00080         LAPACKE_xerbla( "LAPACKE_dsteqr", info );
00081     }
00082     return info;
00083 }


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autogenerated on Sat Jun 8 2019 18:55:53