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STRINGS.DEF
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2000-09-26
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DEFINITION MODULE Strings;
(* (C) Copyright 1987,1988 Fitted Software Tools. All rights reserved. *)
(*
A strings is an ARRAY OF CHAR.
If the string does not completely fill the array, it is terminated
by a 0C.
*)
PROCEDURE CompareStr( s1, s2 :ARRAY OF CHAR ) :INTEGER;
(*
Returns:
0 if s1 = s2
-1 if s1 < s2
+1 if s1 > s2
*)
PROCEDURE Assign( VAR source, dest :ARRAY OF CHAR );
(*
copies source to dest
*)
PROCEDURE Length( s :ARRAY OF CHAR ) :CARDINAL;
(*
returns the length of s
*)
PROCEDURE Concat( s1, s2 :ARRAY OF CHAR; VAR result :ARRAY OF CHAR );
(*
Concatenates s2 to s1 and places the resulting string in result
*)
PROCEDURE Pos( subs, s :ARRAY OF CHAR ) :CARDINAL;
(*
Returns:
index of first occurrence of subs in s or
> HIGH(s) if no match is found
*)
PROCEDURE Append( VAR s1 :ARRAY OF CHAR; s2 :ARRAY OF CHAR );
(*
appends s2 at the end of s1.
equivalent to Concat( s1, s2, s1 ), but more obvious and efficient.
*)
PROCEDURE Insert( subs :ARRAY OF CHAR; VAR s :ARRAY OF CHAR; at :CARDINAL );
(*
inserts subs into s at position at.
*)
PROCEDURE Delete( VAR s :ARRAY OF CHAR; pos, len :CARDINAL );
(*
delete len chars from s starting at position pos
*)
PROCEDURE Copy( src :ARRAY OF CHAR; pos, len :CARDINAL;
VAR dest :ARRAY OF CHAR );
(*
copy len characters starting at pos from src to dest
*)
END Strings.