lapacke_zhgeqz.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 zhgeqz
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_zhgeqz( int matrix_order, char job, char compq, char compz,
00038                            lapack_int n, lapack_int ilo, lapack_int ihi,
00039                            lapack_complex_double* h, lapack_int ldh,
00040                            lapack_complex_double* t, lapack_int ldt,
00041                            lapack_complex_double* alpha,
00042                            lapack_complex_double* beta,
00043                            lapack_complex_double* q, lapack_int ldq,
00044                            lapack_complex_double* z, lapack_int ldz )
00045 {
00046     lapack_int info = 0;
00047     lapack_int lwork = -1;
00048     double* rwork = NULL;
00049     lapack_complex_double* work = NULL;
00050     lapack_complex_double work_query;
00051     if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
00052         LAPACKE_xerbla( "LAPACKE_zhgeqz", -1 );
00053         return -1;
00054     }
00055 #ifndef LAPACK_DISABLE_NAN_CHECK
00056     /* Optionally check input matrices for NaNs */
00057     if( LAPACKE_zge_nancheck( matrix_order, n, n, h, ldh ) ) {
00058         return -8;
00059     }
00060     if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
00061         if( LAPACKE_zge_nancheck( matrix_order, n, n, q, ldq ) ) {
00062             return -14;
00063         }
00064     }
00065     if( LAPACKE_zge_nancheck( matrix_order, n, n, t, ldt ) ) {
00066         return -10;
00067     }
00068     if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
00069         if( LAPACKE_zge_nancheck( matrix_order, n, n, z, ldz ) ) {
00070             return -16;
00071         }
00072     }
00073 #endif
00074     /* Allocate memory for working array(s) */
00075     rwork = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) );
00076     if( rwork == NULL ) {
00077         info = LAPACK_WORK_MEMORY_ERROR;
00078         goto exit_level_0;
00079     }
00080     /* Query optimal working array(s) size */
00081     info = LAPACKE_zhgeqz_work( matrix_order, job, compq, compz, n, ilo, ihi, h,
00082                                 ldh, t, ldt, alpha, beta, q, ldq, z, ldz,
00083                                 &work_query, lwork, rwork );
00084     if( info != 0 ) {
00085         goto exit_level_1;
00086     }
00087     lwork = LAPACK_Z2INT( work_query );
00088     /* Allocate memory for work arrays */
00089     work = (lapack_complex_double*)
00090         LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
00091     if( work == NULL ) {
00092         info = LAPACK_WORK_MEMORY_ERROR;
00093         goto exit_level_1;
00094     }
00095     /* Call middle-level interface */
00096     info = LAPACKE_zhgeqz_work( matrix_order, job, compq, compz, n, ilo, ihi, h,
00097                                 ldh, t, ldt, alpha, beta, q, ldq, z, ldz, work,
00098                                 lwork, rwork );
00099     /* Release memory and exit */
00100     LAPACKE_free( work );
00101 exit_level_1:
00102     LAPACKE_free( rwork );
00103 exit_level_0:
00104     if( info == LAPACK_WORK_MEMORY_ERROR ) {
00105         LAPACKE_xerbla( "LAPACKE_zhgeqz", info );
00106     }
00107     return info;
00108 }


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