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Annotation of rpl/lapack/blas/xerbla_array.f, revision 1.4

1.1       bertrand    1: *> \brief \b XERBLA_ARRAY
                      2: *
                      3: *  =========== DOCUMENTATION ===========
                      4: *
                      5: * Online html documentation available at 
                      6: *            http://www.netlib.org/lapack/explore-html/ 
                      7: *
                      8: *  Definition:
                      9: *  ===========
                     10: *
                     11: *       SUBROUTINE XERBLA_ARRAY(SRNAME_ARRAY, SRNAME_LEN, INFO)
                     12: * 
                     13: *       .. Scalar Arguments ..
                     14: *       INTEGER SRNAME_LEN, INFO
                     15: *       ..
                     16: *       .. Array Arguments ..
                     17: *       CHARACTER(1) SRNAME_ARRAY(SRNAME_LEN)
                     18: *       ..
                     19: *  
                     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: *
                     71: *> \author Univ. of Tennessee 
                     72: *> \author Univ. of California Berkeley 
                     73: *> \author Univ. of Colorado Denver 
                     74: *> \author NAG Ltd. 
                     75: *
                     76: *> \date November 2011
                     77: *
                     78: *> \ingroup aux_blas
                     79: *
                     80: *  =====================================================================
                     81:       SUBROUTINE XERBLA_ARRAY(SRNAME_ARRAY, SRNAME_LEN, INFO)
                     82: *
                     83: *  -- Reference BLAS level1 routine (version 3.4.0) --
                     84: *  -- Reference BLAS is a software package provided by Univ. of Tennessee,    --
                     85: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
                     86: *     November 2011
                     87: *
                     88: *     .. Scalar Arguments ..
                     89:       INTEGER SRNAME_LEN, INFO
                     90: *     ..
                     91: *     .. Array Arguments ..
                     92:       CHARACTER(1) SRNAME_ARRAY(SRNAME_LEN)
                     93: *     ..
                     94: *
                     95: * =====================================================================
                     96: *
                     97: *     ..
                     98: *     .. Local Scalars ..
                     99:       INTEGER I
                    100: *     ..
                    101: *     .. Local Arrays ..
                    102:       CHARACTER*32 SRNAME
                    103: *     ..
                    104: *     .. Intrinsic Functions ..
                    105:       INTRINSIC MIN, LEN
                    106: *     ..
                    107: *     .. External Functions ..
                    108:       EXTERNAL XERBLA
                    109: *     ..
                    110: *     .. Executable Statements ..
                    111:       SRNAME = ''
                    112:       DO I = 1, MIN( SRNAME_LEN, LEN( SRNAME ) )
                    113:          SRNAME( I:I ) = SRNAME_ARRAY( I )
                    114:       END DO
                    115: 
                    116:       CALL XERBLA( SRNAME, INFO )
                    117: 
                    118:       RETURN
                    119:       END