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

---
 Dragon/src/LIBWID.f | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Dragon/src/LIBWID.f

(limited to 'Dragon/src/LIBWID.f')

diff --git a/Dragon/src/LIBWID.f b/Dragon/src/LIBWID.f
new file mode 100644
index 0000000..04e9b30
--- /dev/null
+++ b/Dragon/src/LIBWID.f
@@ -0,0 +1,51 @@
+*DECK LIBWID
+      FUNCTION LIBWID(NEL,IWISO,ISOID)
+*
+*-----------------------------------------------------------------------
+*
+*Purpose:
+* Find isotope number associated with isotope id on WIMS-NEA and
+* WIMS-AECL library.
+*
+*Copyright:
+* Copyright (C) 2002 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
+* NEL     number of isotopes on library.
+* IWISO   id of isotope on library.
+* ISOID   isotope id requested.
+*
+*Parameters: output
+* LIBWID  isotope number associated with id  (= 0 when isotope id is
+*         not found).
+*
+*-----------------------------------------------------------------------
+*
+      IMPLICIT   NONE
+*----
+*  SUBROUTINE ARGUMENTS
+*----
+      INTEGER    NEL,IWISO(NEL),ISOID,LIBWID
+*----
+*  LOCAL VARIABLES
+*----
+      INTEGER    IEL
+*----
+      LIBWID=0
+      IF(ISOID.GT.0) THEN
+        DO 100 IEL=1,NEL
+          IF(IWISO(IEL).EQ.ISOID) THEN
+            LIBWID=IEL
+            GO TO 105
+          ENDIF
+ 100    CONTINUE
+ 105    CONTINUE
+      ENDIF
+      RETURN
+      END
-- 
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