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- /*
- * File......: ADesSort.Prg
- * Author....: David Husnian
- * Date......: $Date: 15 Aug 1991 23:02:42 $
- * Revision..: $Revision: 1.2 $
- * Log file..: $Logfile: E:/nanfor/src/adessort.prv $
- *
- * This is an original work by David Husnian and is placed in the
- * public domain.
- *
- * Modification history:
- * ---------------------
- *
- * $Log: E:/nanfor/src/adessort.prv $
- *
- * Rev 1.2 15 Aug 1991 23:02:42 GLENN
- * Forest Belt proofread/edited/cleaned up doc
- *
- * Rev 1.1 14 Jun 1991 19:50:50 GLENN
- * Minor edit to file header
- *
- * Rev 1.0 01 Apr 1991 01:00:30 GLENN
- * Nanforum Toolkit
- *
- */
-
-
- /* $DOC$
- * $FUNCNAME$
- * FT_ADESSORT()
- * $CATEGORY$
- * Array
- * $ONELINER$
- * Sort an array in descending order
- * $SYNTAX$
- * FT_ADESSORT( <aArray> [, <nStartIndex> [, <nEndIndex> ] ] ) -> aSorted
- * $ARGUMENTS$
- * <aArray> is the array to be sorted
- *
- * <nStartIndex> is the first array item to include in the sort,
- * defaults to first element
- *
- * <nEndIndex> is the last array element to include in the sort,
- * defaults to all elements
- * $RETURNS$
- * The array, sorted in descending order.
- * $DESCRIPTION$
- * This function is used to sort an array in descending order, i.e., Z-A
- * $EXAMPLES$
- * FT_ADESSORT(aNames) // Sort the Entire Array
- *
- * FT_ADESSORT(aNames, 5) // Sort from the 5th Element On
- *
- * FT_ADESSORT(aNames, , 10) // Sort the 1st 10 Elements
- *
- * FT_ADESSORT(aNames, 5, 10) // Sort Elements 5-10
- * $END$
- */
-
-
- #command DEFAULT <Param1> TO <Def1> [, <ParamN> TO <DefN> ] ;
- => ;
- <Param1> := IF(<Param1> == NIL,<Def1>,<Param1>) ;
- [; <ParamN> := IF(<ParamN> == NIL,<DefN>,<ParamN>)]
-
- #command DEFAULT <Param1> TO <Def1> IF NOT <Type1> ;
- [, <ParamN> TO <DefN> IF NOT <TypeN> ] ;
- => ;
- <Param1> := IF(VALTYPE(<Param1>) == <Type1>,<Param1>,<Def1>) ;
- [; <ParamN> := IF(VALTYPE(<ParamN>) == <TypeN>,<ParamN>,<DefN>)]
-
-
- #define FORCE_BETWEEN(x,y,z) (y := MAX(MIN(y,z),x))
-
- FUNCTION FT_ADESSORT(aArray, nStartIndex, nEndIndex)
-
- DEFAULT nStartIndex TO 1, ;
- nEndIndex TO LEN(aArray)
-
- // Make Sure Bounds are in Range
- FORCE_BETWEEN(1, nEndIndex, LEN(aArray))
- FORCE_BETWEEN(1, nStartIndex, nEndIndex)
-
- RETURN (ASORT(aArray, nStartIndex, nEndIndex, ;
- { | xElement1, xElement2 | xElement1 > xElement2 } ))