From 7dfcc480ba1e19bd3232349fc733caef94034292 Mon Sep 17 00:00:00 2001
From: stainer_t <thomas.stainer@oecd-nea.org>
Date: Mon, 8 Sep 2025 13:48:49 +0200
Subject: Initial commit from Polytechnique Montreal

---
 Ganlib/src/XDREED.f90 | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 Ganlib/src/XDREED.f90

(limited to 'Ganlib/src/XDREED.f90')

diff --git a/Ganlib/src/XDREED.f90 b/Ganlib/src/XDREED.f90
new file mode 100644
index 0000000..e804042
--- /dev/null
+++ b/Ganlib/src/XDREED.f90
@@ -0,0 +1,85 @@
+!
+!-----------------------------------------------------------------------
+!
+!Purpose:
+! Read or write CCCC format records.
+! XDREED:  transfer data from CCCC file to array.
+! XDRITE:  transfer data from array to CCCC file.
+! XDRCLS:  close file and release unit number.
+!
+!Copyright:
+! Copyright (C) 1991 Ecole Polytechnique de Montreal
+! This library is free software; you can redistribute it and/or
+! modify it under the terms of the GNU Lesser General Public
+! License as published by the Free Software Foundation; either
+! version 2.1 of the License, or (at your option) any later version.
+!
+!Author(s): G. Marleau
+!
+!Parameters: input
+! iucccc  file unit
+! numrec  record number to read
+! nwds    number of words to read
+!
+!Parameters: input/output
+! array   location in central memory where information is to be stored
+!
+!Reference:
+! R. D. O'Dell, 'Standard interface files and procedures for
+! reactor physics codes, Version IV', Los Alamos National
+! Laboratory Report LA-6941-MS (Sept. 1977).
+!
+!-----------------------------------------------------------------------
+!
+module XDRMOD
+   private
+   integer, parameter :: nbunit=99
+   integer, save, dimension(nbunit) :: ipunit(1:nbunit)=0
+   public :: XDREED, XDRITE, XDRCLS
+contains
+   subroutine XDREED(iucccc,numrec,array,nwds)
+      integer, intent(in) :: iucccc,numrec,nwds
+      real, intent(out) :: array(nwds)
+      !
+      if (numrec.eq.0) then
+        call XABORT('XDREED: record number 0 cannot be read '// &
+                    'from cccc file')
+      endif
+      if (nwds.eq.0) return
+      if (numrec.eq.1) then
+        rewind iucccc
+      else
+        nskip=numrec-ipunit(iucccc)-1
+        if (nskip.gt.0) then
+          do i=1,nskip
+            read(iucccc) dum
+          enddo
+        else if (nskip.lt.0) then
+          do i=1,-nskip
+            backspace iucccc
+          enddo
+        endif
+      endif
+      read(iucccc) (array(jj),jj=1,nwds)
+      ipunit(iucccc)=numrec
+   end subroutine XDREED
+   !
+   subroutine XDRITE(iucccc,numrec,array,nwds)
+      integer, intent(in) :: iucccc,numrec,nwds
+      real, intent(in) :: array(nwds)
+      !
+      if (numrec.eq.0) then
+        call XABORT('XDRITE: record number 0 cannot be written '// &
+                    'on cccc file')
+      endif
+      if (nwds.eq.0) return
+      if (numrec.eq.1) rewind iucccc
+      write(iucccc) (array(jj),jj=1,nwds)
+   end subroutine XDRITE
+   !
+   subroutine XDRCLS(iucccc)
+      integer, intent(in) :: iucccc
+      !
+      ipunit(iucccc)=0
+   end subroutine XDRCLS
+end module XDRMOD
-- 
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