numeric-linalg

001
002
003
004
005
006
007
008
009
010
011
012
013
014
015
016
017
018
019
020
021
022
023
024
025
026
027
028
029
030
031
032
033
034
035
036
037
038
039
040
041
042
043
044
045
046
047
048
049
050
051
052
053
054
055
056
057
058
059
060
061
062
063
064
065
066
067
068
069
070
071
072
073
074
075
076
077
078
079
080
081
082
083
084
085
086
087
088
089
090
091
092
093
094
095
096
097
098
099
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129

*> \brief \b XERBLA
*
*  =========== DOCUMENTATION ===========
*
* Online html documentation available at
*            http://www.netlib.org/lapack/explore-html/
*
*  Definition:
*  ===========
*
*       SUBROUTINE XERBLA( SRNAME, INFO )
*
*       .. Scalar Arguments ..
*       CHARACTER*(*)      SRNAME
*       INTEGER            INFO
*       ..
*
*
*> \par Purpose:
*  =============
*>
*> \verbatim
*>
*> This is a special version of XERBLA to be used only as part of
*> the test program for testing error exits from the LAPACK routines.
*> Error messages are printed if INFO.NE.INFOT or if SRNAME.NE.SRNAMT,
*> where INFOT and SRNAMT are values stored in COMMON.
*> \endverbatim
*
*  Arguments:
*  ==========
*
*> \param[in] SRNAME
*> \verbatim
*>          SRNAME is CHARACTER*(*)
*>          The name of the subroutine calling XERBLA.  This name should
*>          match the COMMON variable SRNAMT.
*> \endverbatim
*>
*> \param[in] INFO
*> \verbatim
*>          INFO is INTEGER
*>          The error return code from the calling subroutine.  INFO
*>          should equal the COMMON variable INFOT.
*> \endverbatim
*
*  Authors:
*  ========
*
*> \author Univ. of Tennessee
*> \author Univ. of California Berkeley
*> \author Univ. of Colorado Denver
*> \author NAG Ltd.
*
*> \ingroup aux_eig
*
*> \par Further Details:
*  =====================
*>
*> \verbatim
*>
*>  The following variables are passed via the common blocks INFOC and
*>  SRNAMC:
*>
*>  INFOT   INTEGER      Expected integer return code
*>  NOUT    INTEGER      Unit number for printing error messages
*>  OK      LOGICAL      Set to .TRUE. if INFO = INFOT and
*>                       SRNAME = SRNAMT, otherwise set to .FALSE.
*>  LERR    LOGICAL      Set to .TRUE., indicating that XERBLA was called
*>  SRNAMT  CHARACTER*(*) Expected name of calling subroutine
*> \endverbatim
*>
*  =====================================================================
      SUBROUTINE XERBLA( SRNAME, INFO )
*
*  -- LAPACK test routine --
*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*
*     .. Scalar Arguments ..
      CHARACTER*(*)      SRNAME
      INTEGER            INFO
*     ..
*
*  =====================================================================
*
*     .. Scalars in Common ..
      LOGICAL            LERR, OK
      CHARACTER*32       SRNAMT
      INTEGER            INFOT, NOUT
*     ..
*     .. Intrinsic Functions ..
      INTRINSIC          LEN_TRIM
*     ..
*     .. Common blocks ..
      COMMON             / INFOC / INFOT, NOUT, OK, LERR
      COMMON             / SRNAMC / SRNAMT
*     ..
*     .. Executable Statements ..
*
      LERR = .TRUE.
      IF( INFO.NE.INFOT ) THEN
         IF( INFOT.NE.0 ) THEN
            WRITE( NOUT, FMT = 9999 )
     $     SRNAMT( 1:LEN_TRIM( SRNAMT ) ), INFO, INFOT
         ELSE
            WRITE( NOUT, FMT = 9997 )
     $     SRNAME( 1:LEN_TRIM( SRNAME ) ), INFO
         END IF
         OK = .FALSE.
      END IF
      IF( SRNAME.NE.SRNAMT ) THEN
         WRITE( NOUT, FMT = 9998 )
     $     SRNAME( 1:LEN_TRIM( SRNAME ) ),
     $     SRNAMT( 1:LEN_TRIM( SRNAMT ) )
         OK = .FALSE.
      END IF
      RETURN
*
 9999 FORMAT( ' *** XERBLA was called from ', A, ' with INFO = ', I6,
     $      ' instead of ', I2, ' ***' )
 9998 FORMAT( ' *** XERBLA was called with SRNAME = ', A,
     $      ' instead of ', A9, ' ***' )
 9997 FORMAT( ' *** On entry to ', A, ' parameter number ', I6,
     $      ' had an illegal value ***' )
*
*     End of XERBLA
*
      END