DIRECTORYPS;PSArrayImpl: CEDAR PROGRAMIMPORTS PS~ BEGIN OPEN PS;ArrayCreate: PUBLIC PROC [size: INT] RETURNS [Array] ~ {IF size<0 THEN ERROR Error[rangecheck];IF size IN ArrayIndex THEN {ref: ArrayRef ~ NEW[ArrayRep[size]];RETURN[[val: [executable: FALSE, variant: array[access: unlimited, start: 0, length: size]], ref: ref]];}ELSE ERROR Error[limitcheck];};ArraySetAccess: PUBLIC PROC [array: Array, access: Access] RETURNS [Array] ~ {IF array.val.access<access THEN ERROR Error[invalidaccess];array.val.access _ access;RETURN [array];};ArrayGet: PUBLIC PROC [array: Array, index: INT] RETURNS [Any] ~ {IF index NOT IN [0..array.val.length) THEN ERROR Error[rangecheck];RETURN [array.ref[array.val.start+index]];};ArrayPut: PUBLIC PROC [array: Array, index: INT, x: Any] ~ {IF index NOT IN[0..array.val.length) THEN ERROR Error[rangecheck];array.ref[array.val.start+index] _ x;};ArrayGetInterval: PUBLIC PROC [array: Array, index, count: INT] RETURNS [Array] ~ {IF index NOT IN [0..array.val.length] THEN ERROR Error[rangecheck];IF count NOT IN [0..(array.val.length-index)] THEN ERROR Error[rangecheck];RETURN[[val: [executable: array.val.executable, variant: array[access: array.val.access, start: array.val.start+index, length: count]], ref: array.ref]];};ArrayPutInterval: PUBLIC PROC [array: Array, index: INT, interval: Array] ~ {subarray: Array ~ ArrayGetInterval[array, index, ArrayLength[interval]];FOR i: INT IN[0..ArrayLength[subarray]) DOArrayPut[subarray, i, ArrayGet[interval, i]];ENDLOOP;};ArrayCopy: PUBLIC PROC [array1, array2: Array] RETURNS [Array] ~ {subarray2: Array ~ ArrayGetInterval[array2, 0, ArrayLength[array1]];ArrayPutInterval[subarray2, 0, array1];RETURN [subarray2];};ArrayForAll: PUBLIC PROC [array: Array, action: PROC [Any]] ~ {FOR index: INT IN [0..ArrayLength[array]) DOaction[ArrayGet[array, index]];ENDLOOP;};END.  ╓  PSArrayImpl.mesaCopyright ╙ 1986, 1987 by Xerox Corporation.  All rights reserved.Doug Wyatt, May 13, 1987 11:49:52 am PDTPostScript implementation: array operations.Basic Array operationsFOR i: ArrayIndex IN[0..ref.maxLength) DO ref[i] _ null ENDLOOP;ArrayLength: PUBLIC PROC [array: Array] RETURNS [INT] ~ {RETURN [array.val.length];};ArrayAccess: PUBLIC PROC [array: Array] RETURNS [Access] ~ {RETURN [array.val.access];};Other Array operations Э╩S  Ш codeЪЬЩKЪЬBЩBKЩ(ЧKШ KЩ,KЩ Ъ╧k	Ш	KЪЭЬШЧKШ KЪ╧nЬЭЬЭШKЪЭЬЭШ
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