XERBLA_ARRAY assists other languages in calling XERBLA, the LAPACK


 and BLAS error handler.  Rather than taking a Fortran string argument


 as the function's name, XERBLA_ARRAY takes an array of single


 characters along with the array's length.  XERBLA_ARRAY then copies


 up to 32 characters of that array into a Fortran string and passes


 that to XERBLA.  If called with a non-positive SRNAME_LEN,


 XERBLA_ARRAY will call XERBLA with a string of all blank characters.


 Say some macro or other device makes XERBLA_ARRAY available to C99


 by a name lapack_xerbla and with a common Fortran calling convention.


 Then a C99 program could invoke XERBLA via:


    {


      int flen = strlen(__func__);


      lapack_xerbla(__func__, &flen, &info);


    }


 Providing XERBLA_ARRAY is not necessary for intercepting LAPACK


 errors.  XERBLA_ARRAY calls XERBLA.

SRNAME_ARRAY

          SRNAME_ARRAY is CHARACTER(1) array, dimension (SRNAME_LEN)


          The name of the routine which called XERBLA_ARRAY.

SRNAME_LEN

          SRNAME_LEN is INTEGER


          The length of the name in SRNAME_ARRAY.

INFO

          INFO is INTEGER


          The position of the invalid parameter in the parameter list


          of the calling routine.

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NAG Ltd.

December 2016