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g1fwt2dsws_.F

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00001 c g1fwt2dsws_.F
00002 
00003 c*********************************************************************
00004 c*          (c) Copyright 1994-2002 Brown Deer Technology, LLC.
00005 c*                        All rights reserved.
00006 c*********************************************************************
00007 
00008         subroutine g1fwt2dsws(ierr,Sizef2d,ns,size,sdata,wdata,ws)
00009 
00010         implicit none
00011 
00012 c       ****************************************
00013 c       ***** COMMON BLOCKS AND PARAMETERS *****
00014 c       ****************************************
00015 
00016 #include "stormdef.h"
00017         real H00,H10,H11
00018         parameter( H00 = STORMDEF_MATHCONST_GHB1H00 )
00019         parameter( H10 = STORMDEF_MATHCONST_GHB1H10 )
00020         parameter( H11 = STORMDEF_MATHCONST_GHB1H11 )
00021 
00022 c       *******************************
00023 c       ***** VARIABLES EXCHANGED *****
00024 c       *******************************
00025 
00026         integer ierr
00027         integer Sizef2d 
00028         integer ns
00029         integer size
00030         real sdata(0:1,Sizef2d,Sizef2d)
00031         real wdata(0:1,Sizef2d,Sizef2d)
00032         real ws(0:1,2*Sizef2d)
00033 
00034 c       ***************************
00035 c       ***** LOCAL VARIABLES *****
00036 c       ***************************
00037 
00038         integer i,j,size1,size2,l
00039 
00040 c       ******************************
00041 c       ***** EXTERNAL FUNCTIONS *****
00042 c       ******************************
00043 
00044         if (size.lt.ns) then
00045 #ifdef STORM_DEBUG
00046            write(*,*) 'ERROR: g1fwt2dsws() size < ns.'
00047 #endif
00048            ierr=1
00049            return
00050         endif
00051 
00052         do i=1,size
00053            do j=1,size
00054               wdata(0,i,j)=sdata(0,i,j)
00055               wdata(1,i,j)=sdata(1,i,j)
00056            enddo
00057         enddo
00058 
00059         if (size.eq.ns) then
00060            ierr=0
00061            return
00062         endif
00063 
00064         size1=size
00065 
00066 10      continue
00067 
00068         size2=size1/2
00069 
00070 c ##### index 1 #####
00071         do j=1,size1
00072 
00073               do i=1,size1
00074                  ws(0,i)=wdata(0,i,j)
00075                  ws(1,i)=wdata(1,i,j)
00076               enddo
00077 
00078               do i = 1,size2
00079                  l = 2*i - 1
00080                  ws(0,Sizef2d+i)=H00*(ws(0,l)+ws(0,l+1))
00081                  ws(1,Sizef2d+i)=H10*(ws(0,l)-ws(0,l+1))
00082      &                          +H11*(ws(1,l)+ws(1,l+1))
00083                  ws(0,Sizef2d+size2+i)=H11*(ws(0,l)-ws(0,l+1))
00084      &                                -H10*(ws(1,l)+ws(1,l+1))
00085                  ws(1,Sizef2d+size2+i)=H00*(ws(1,l)-ws(1,l+1))
00086               enddo
00087 
00088               do i=1,size1
00089                  wdata(0,i,j)=ws(0,Sizef2d+i)
00090                  wdata(1,i,j)=ws(1,Sizef2d+i)
00091               enddo
00092 
00093         enddo
00094 
00095 c ##### index 2 #####
00096         do i=1,size1
00097 
00098               do j=1,size1
00099                  ws(0,j)=wdata(0,i,j)
00100                  ws(1,j)=wdata(1,i,j)
00101               enddo
00102 
00103               do j = 1, size2
00104                  l = 2*j - 1
00105                  ws(0,Sizef2d+j)=H00*(ws(0,l)+ws(0,l+1))
00106                  ws(1,Sizef2d+j)=H10*(ws(0,l)-ws(0,l+1))
00107      &                          +H11*(ws(1,l)+ws(1,l+1))
00108                  ws(0,Sizef2d+size2+j)=H11*(ws(0,l)-ws(0,l+1))
00109      &                                -H10*(ws(1,l)+ws(1,l+1))
00110                  ws(1,Sizef2d+size2+j)=H00*(ws(1,l)-ws(1,l+1))
00111               enddo
00112 
00113               do j=1,size1
00114                 wdata(0,i,j)=ws(0,Sizef2d+j)
00115                 wdata(1,i,j)=ws(1,Sizef2d+j)
00116               enddo
00117 
00118         enddo
00119 
00120         size1=size2
00121 
00122         if (size1.gt.ns) then
00123            goto 10
00124         endif
00125 
00126         if (size1.lt.ns) then
00127 #ifdef STORM_DEBUG
00128            write(*,*) 'ERROR: g1fwt2dsws() size not power of 2.'
00129 #endif
00130            ierr=2
00131            return
00132         endif
00133 
00134         ierr=0
00135 
00136         return
00137         end
00138 

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