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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+.help
+		procedure asival
+
+     This procedure finds interpolated value assuming that x lands in
+array i.e. 1 <= x < npts. 
+It must be called by a routine that checks for out of bound references
+and takes care of bad pixels.
+     This version assumes that the data are stored for polynomials and
+the spline appears as basis-spline coefficients.
+     Also the sequential evaluators are used to obtain the values in
+order to reduce the amount of duplicated code.
+.endhelp
+
+real procedure asival(x,coeff)
+include "interpdef.h"
+include "asidef.h"
+
+real x
+real coeff[ARB]
+
+real t
+
+begin
+	switch (ITYPEI)	{	# switch on interpolator type
+	
+	case IT_NEAREST :
+	    call iievne(x,t,1,coeff[COFF+1])
+	    return(t)
+
+	case IT_LINEAR :
+	    call iievli(x,t,1,coeff[COFF+1])
+	    return(t)
+
+	case IT_POLY3 :
+	    call iievp3(x,t,1,coeff[COFF+1])
+	    return(t)
+
+	case IT_POLY5 :
+	    call iievp5(x,t,1,coeff[COFF+1])
+	    return(t)
+
+	case IT_SPLINE3 :
+	    call iievs3(x,t,1,coeff[COFF+1])
+	    return(t)
+
+	}
+end