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Annotation of rpl/lapack/blas/xerbla_array.f, revision 1.8

1.1       bertrand    1: *> \brief \b XERBLA_ARRAY
                      2: *
                      3: *  =========== DOCUMENTATION ===========
                      4: *
1.6       bertrand    5: * Online html documentation available at
                      6: *            http://www.netlib.org/lapack/explore-html/
1.1       bertrand    7: *
                      8: *  Definition:
                      9: *  ===========
                     10: *
                     11: *       SUBROUTINE XERBLA_ARRAY(SRNAME_ARRAY, SRNAME_LEN, INFO)
1.6       bertrand   12: *
1.1       bertrand   13: *       .. Scalar Arguments ..
                     14: *       INTEGER SRNAME_LEN, INFO
                     15: *       ..
                     16: *       .. Array Arguments ..
                     17: *       CHARACTER(1) SRNAME_ARRAY(SRNAME_LEN)
                     18: *       ..
1.6       bertrand   19: *
1.1       bertrand   20: *
                     21: *> \par Purpose:
                     22: *  =============
                     23: *>
                     24: *> \verbatim
                     25: *>
                     26: *> XERBLA_ARRAY assists other languages in calling XERBLA, the LAPACK
                     27: *> and BLAS error handler.  Rather than taking a Fortran string argument
                     28: *> as the function's name, XERBLA_ARRAY takes an array of single
                     29: *> characters along with the array's length.  XERBLA_ARRAY then copies
                     30: *> up to 32 characters of that array into a Fortran string and passes
                     31: *> that to XERBLA.  If called with a non-positive SRNAME_LEN,
                     32: *> XERBLA_ARRAY will call XERBLA with a string of all blank characters.
                     33: *>
                     34: *> Say some macro or other device makes XERBLA_ARRAY available to C99
                     35: *> by a name lapack_xerbla and with a common Fortran calling convention.
                     36: *> Then a C99 program could invoke XERBLA via:
                     37: *>    {
                     38: *>      int flen = strlen(__func__);
                     39: *>      lapack_xerbla(__func__, &flen, &info);
                     40: *>    }
                     41: *>
                     42: *> Providing XERBLA_ARRAY is not necessary for intercepting LAPACK
                     43: *> errors.  XERBLA_ARRAY calls XERBLA.
                     44: *> \endverbatim
                     45: *
                     46: *  Arguments:
                     47: *  ==========
                     48: *
                     49: *> \param[in] SRNAME_ARRAY
                     50: *> \verbatim
                     51: *>          SRNAME_ARRAY is CHARACTER(1) array, dimension (SRNAME_LEN)
                     52: *>          The name of the routine which called XERBLA_ARRAY.
                     53: *> \endverbatim
                     54: *>
                     55: *> \param[in] SRNAME_LEN
                     56: *> \verbatim
                     57: *>          SRNAME_LEN is INTEGER
                     58: *>          The length of the name in SRNAME_ARRAY.
                     59: *> \endverbatim
                     60: *>
                     61: *> \param[in] INFO
                     62: *> \verbatim
                     63: *>          INFO is INTEGER
                     64: *>          The position of the invalid parameter in the parameter list
                     65: *>          of the calling routine.
                     66: *> \endverbatim
                     67: *
                     68: *  Authors:
                     69: *  ========
                     70: *
1.6       bertrand   71: *> \author Univ. of Tennessee
                     72: *> \author Univ. of California Berkeley
                     73: *> \author Univ. of Colorado Denver
                     74: *> \author NAG Ltd.
1.1       bertrand   75: *
                     76: *> \ingroup aux_blas
                     77: *
                     78: *  =====================================================================
                     79:       SUBROUTINE XERBLA_ARRAY(SRNAME_ARRAY, SRNAME_LEN, INFO)
                     80: *
1.8     ! bertrand   81: *  -- Reference BLAS level1 routine --
1.1       bertrand   82: *  -- Reference BLAS is a software package provided by Univ. of Tennessee,    --
                     83: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
                     84: *
                     85: *     .. Scalar Arguments ..
                     86:       INTEGER SRNAME_LEN, INFO
                     87: *     ..
                     88: *     .. Array Arguments ..
                     89:       CHARACTER(1) SRNAME_ARRAY(SRNAME_LEN)
                     90: *     ..
                     91: *
                     92: * =====================================================================
                     93: *
                     94: *     ..
                     95: *     .. Local Scalars ..
                     96:       INTEGER I
                     97: *     ..
                     98: *     .. Local Arrays ..
                     99:       CHARACTER*32 SRNAME
                    100: *     ..
                    101: *     .. Intrinsic Functions ..
                    102:       INTRINSIC MIN, LEN
                    103: *     ..
                    104: *     .. External Functions ..
                    105:       EXTERNAL XERBLA
                    106: *     ..
                    107: *     .. Executable Statements ..
1.8     ! bertrand  108:       SRNAME = ' '
1.1       bertrand  109:       DO I = 1, MIN( SRNAME_LEN, LEN( SRNAME ) )
                    110:          SRNAME( I:I ) = SRNAME_ARRAY( I )
                    111:       END DO
                    112: 
                    113:       CALL XERBLA( SRNAME, INFO )
                    114: 
                    115:       RETURN
1.8     ! bertrand  116: *
        !           117: *     End of XERBLA_ARRAY
        !           118: *
1.1       bertrand  119:       END