sfgf.nearestevent.txt

[LegacyColorValue = true]; 

{
Function    : sfgf.nearestevent
Description : Determine the nearest event

Copyright 2016 Scottfree Gains LLC

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
}

Inputs:
	RDate(Numeric),
	Events(Numeric),
	Event[MaxSize1](NumericArray),
	EventIndex(NumericRef);

Variables:
	GYear(0),
	GMonth(0),
	GDay(0),
	ih(0),
	Holidays(0),
	diff(0),
	NearRD(0),
	ird(0);

Arrays:
	Holiday[20](0),
	HolidayName[20]("");	

Condition1 = sfgf.rdate2gdate(RDate, GYear, GMonth, GDay);
diff = 32;
For ih = 0 to Events-1 Begin
	Value1 = Event[ih] - RDate;
	Value2 = AbsValue(Value1);
	If Value2 < diff Then Begin
		diff = Value2;
		EventIndex = ih;
		Value3 = Value1;
	End;
End;

NearRD = Event[EventIndex];
If Value3 > 0 Then Begin
	Value4 = RDate;
	Value5 = NearRD;
End Else Begin
	Value4 = NearRD;
	Value5 = RDate;
End;
Holidays = sfgf.setholidays(GYear, True, Holiday, HolidayName);
For ird = Value4 To Value5 Begin
	Value6 = sfgf.dayofweek(ird);
	If Value6 = 0 or Value6 = 6 Then
		diff = diff - 1;
	For ih = 0 to Holidays-1 Begin
		If ird = Holiday[ih] Then
			diff = diff - 1;
	End;
End;
If Value3 > 0 Then
	sfgf.nearestevent = -diff
Else
	sfgf.nearestevent = diff;