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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
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00009       this list of conditions and the following disclaimer.
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00016 
00017   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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00028 ******************************************************************************
00029 * Contents: Native high-level C interface to LAPACK function dhgeqz
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_dhgeqz( int matrix_order, char job, char compq, char compz,
00038                            lapack_int n, lapack_int ilo, lapack_int ihi,
00039                            double* h, lapack_int ldh, double* t, lapack_int ldt,
00040                            double* alphar, double* alphai, double* beta,
00041                            double* q, lapack_int ldq, double* z,
00042                            lapack_int ldz )
00043 {
00044     lapack_int info = 0;
00045     lapack_int lwork = -1;
00046     double* work = NULL;
00047     double work_query;
00048     if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
00049         LAPACKE_xerbla( "LAPACKE_dhgeqz", -1 );
00050         return -1;
00051     }
00052 #ifndef LAPACK_DISABLE_NAN_CHECK
00053     /* Optionally check input matrices for NaNs */
00054     if( LAPACKE_dge_nancheck( matrix_order, n, n, h, ldh ) ) {
00055         return -8;
00056     }
00057     if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
00058         if( LAPACKE_dge_nancheck( matrix_order, n, n, q, ldq ) ) {
00059             return -15;
00060         }
00061     }
00062     if( LAPACKE_dge_nancheck( matrix_order, n, n, t, ldt ) ) {
00063         return -10;
00064     }
00065     if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
00066         if( LAPACKE_dge_nancheck( matrix_order, n, n, z, ldz ) ) {
00067             return -17;
00068         }
00069     }
00070 #endif
00071     /* Query optimal working array(s) size */
00072     info = LAPACKE_dhgeqz_work( matrix_order, job, compq, compz, n, ilo, ihi, h,
00073                                 ldh, t, ldt, alphar, alphai, beta, q, ldq, z,
00074                                 ldz, &work_query, lwork );
00075     if( info != 0 ) {
00076         goto exit_level_0;
00077     }
00078     lwork = (lapack_int)work_query;
00079     /* Allocate memory for work arrays */
00080     work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
00081     if( work == NULL ) {
00082         info = LAPACK_WORK_MEMORY_ERROR;
00083         goto exit_level_0;
00084     }
00085     /* Call middle-level interface */
00086     info = LAPACKE_dhgeqz_work( matrix_order, job, compq, compz, n, ilo, ihi, h,
00087                                 ldh, t, ldt, alphar, alphai, beta, q, ldq, z,
00088                                 ldz, work, lwork );
00089     /* Release memory and exit */
00090     LAPACKE_free( work );
00091 exit_level_0:
00092     if( info == LAPACK_WORK_MEMORY_ERROR ) {
00093         LAPACKE_xerbla( "LAPACKE_dhgeqz", info );
00094     }
00095     return info;
00096 }