da/d3b/ilatrans_8f_source.html

00001       INTEGER FUNCTION ILATRANS( TRANS )
00002 *
00003 *  -- LAPACK routine (version 3.2) --
00004 *
00005 *  -- April 2009                                                      --
00006 *
00007 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
00008 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
00009 *
00010 *     .. Scalar Arguments ..
00011       CHARACTER          TRANS
00012 *     ..
00013 *
00014 *  Purpose
00015 *  =======
00016 *
00017 *  This subroutine translates from a character string specifying a
00018 *  transposition operation to the relevant BLAST-specified integer
00019 *  constant.
00020 *
00021 *  ILATRANS returns an INTEGER.  If ILATRANS < 0, then the input is not
00022 *  a character indicating a transposition operator.  Otherwise ILATRANS
00023 *  returns the constant value corresponding to TRANS.
00024 *
00025 *  Arguments
00026 *  =========
00027 *  TRANS   (input) CHARACTER*1
00028 *          Specifies the form of the system of equations:
00029 *          = 'N':  No transpose
00030 *          = 'T':  Transpose
00031 *          = 'C':  Conjugate transpose
00032 *  =====================================================================
00033 *
00034 *     .. Parameters ..
00035       INTEGER BLAS_NO_TRANS, BLAS_TRANS, BLAS_CONJ_TRANS
00036       PARAMETER ( BLAS_NO_TRANS = 111, BLAS_TRANS = 112,
00037      $     BLAS_CONJ_TRANS = 113 )
00038 *     ..
00039 *     .. External Functions ..
00040       LOGICAL            LSAME
00041       EXTERNAL           LSAME
00042 *     ..
00043 *     .. Executable Statements ..
00044       IF( LSAME( TRANS, 'N' ) ) THEN
00045          ILATRANS = BLAS_NO_TRANS
00046       ELSE IF( LSAME( TRANS, 'T' ) ) THEN
00047          ILATRANS = BLAS_TRANS
00048       ELSE IF( LSAME( TRANS, 'C' ) ) THEN
00049          ILATRANS = BLAS_CONJ_TRANS
00050       ELSE
00051          ILATRANS = -1
00052       END IF
00053       RETURN
00054 *
00055 *     End of ILATRANS
00056 *
00057       END