xerbla.f

贝尔实验室多年开发的矩阵计算程序库的说明文件

      SUBROUTINE XERBLA(SRNAME,INFO)
*
*  -- LAPACK auxiliary routine (preliminary version) --
*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
*     November 2006
*
*     .. Scalar Arguments ..
      INTEGER INFO
      CHARACTER*6 SRNAME
*     ..
*
*  Purpose
*  =======
*
*  XERBLA  is an error handler for the LAPACK routines.
*  It is called by an LAPACK routine if an input parameter has an
*  invalid value.  A message is printed and execution stops.
*
*  Installers may consider modifying the STOP statement in order to
*  call system-specific exception-handling facilities.
*
*  Arguments
*  =========
*
*  SRNAME  (input) CHARACTER*6
*          The name of the routine which called XERBLA.
*
*  INFO    (input) INTEGER
*          The position of the invalid parameter in the parameter list
*          of the calling routine.
*
*
      WRITE (*,FMT=9999) SRNAME,INFO
*
      STOP
*
 9999 FORMAT (' ** On entry to ',A6,' parameter number ',I2,' had ',
     +       'an illegal value')
*
*     End of XERBLA
*
      END