SLATEC Routines --- DREORT ---

*DECK DREORT
      SUBROUTINE DREORT (NCOMP, Y, YP, YHP, NIV, W, S, P, IP, STOWA,
     +   IFLAG)
C***BEGIN PROLOGUE  DREORT
C***SUBSIDIARY
C***PURPOSE  Subsidiary to DBVSUP
C***LIBRARY   SLATEC
C***TYPE      DOUBLE PRECISION (REORT-S, DREORT-D)
C***AUTHOR  Watts, H. A., (SNLA)
C***DESCRIPTION
C
C **********************************************************************
C   INPUT
C *********
C     Y, YP and YHP = homogeneous solution matrix and particular
C                     solution vector to be orthonormalized.
C     IFLAG = 1 --  store YHP into Y and YP, test for
C                   reorthonormalization, orthonormalize if needed,
C                   save restart data.
C             2 --  store YHP into Y and YP, reorthonormalization,
C                   no restarts.
C                   (preset orthonormalization mode)
C             3 --  store YHP into Y and YP, reorthonormalization
C                   (when INHOMO=3 and X=XEND).
C **********************************************************************
C   OUTPUT
C *********
C     Y, YP = orthonormalized solutions.
C     NIV = number of independent vectors returned from DMGSBV.
C     IFLAG = 0 --  reorthonormalization was performed.
C            10 --  solution process must be restarted at the last
C                   orthonormalization point.
C            30 --  solutions are linearly dependent, problem must
C                   be restarted from the beginning.
C     W, P, IP = orthonormalization information.
C **********************************************************************
C
C***SEE ALSO  DBVSUP
C***ROUTINES CALLED  DDOT, DMGSBV, DSTOR1, DSTWAY
C***COMMON BLOCKS    DML15T, DML18J, DML8SZ
C***REVISION HISTORY  (YYMMDD)
C   750601  DATE WRITTEN
C   890531  Changed all specific intrinsics to generic.  (WRB)
C   890831  Modified array declarations.  (WRB)
C   890921  Realigned order of variables in certain COMMON blocks.
C           (WRB)
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900328  Added TYPE section.  (WRB)
C   910722  Updated AUTHOR section.  (ALS)
C***END PROLOGUE  DREORT