mindex.F

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C
!||====================================================================
!||    mindex   ../engine/source/materials/mat/mat026/mindex.F
!||====================================================================
      INTEGER FUNCTION mindex(AA,NI,NJ,A)
C     RECHERCHE D'INDEX
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER ni, nj
C     REAL
      my_real
     .   a
C     REAL
      my_real
     .   aa(ni,nj)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER i1, i2, i3
C     REAL
      my_real
     .   a1, a2, a3
C-----------------------------------------------
      i1 = 1
      i2 = nj
      a1 = aa(1,i1)
      a2 = aa(1,i2)
      IF(a2>=a1)THEN
 1      CONTINUE
         i3 = (i1 + i2)/2
         a3 = aa(1,i3)
         IF(a3>=a)THEN
           i2 = i3
           a2 = a3
         ELSE
           i1 = i3
           a1 = a3
         ENDIF
       IF(i2-i1>1) GOTO 1
      ELSE
 2      CONTINUE
         i3 = (i1 + i2)/2
         a3 = aa(1,i3)
         IF(a3<a)THEN
           i2 = i3
           a2 = a3
         ELSE
           i1 = i3
           a1 = a3
         ENDIF
       IF(i2-i1>1) GOTO 2
      ENDIF
C
      mindex=i1
      RETURN
      END