strstr.sa


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------------------------->  GNU Sather - sourcefile  <-------------------------
-- Copyright (C) 2000 by K Hopper, University of Waikato, New Zealand        --
-- This file is part of the GNU Sather library. It is free software; you may --
-- redistribute  and/or modify it under the terms of the GNU Library General --
-- Public  License (LGPL)  as published  by the  Free  Software  Foundation; --
-- either version 2 of the license, or (at your option) any later version.   --
-- This  library  is distributed  in the  hope that it will  be  useful, but --
-- WITHOUT ANY WARRANTY without even the implied warranty of MERCHANTABILITY --
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-- The license text is also available from:  Free Software Foundation, Inc., --
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-------------->  Please email comments to <bug-sather@gnu.org>  <--------------


partial class STR_STR < $TEXT, $ANCHORED_FMT

partial class STR_STR < $TEXT, $ANCHORED_FMT is -- This partial class provides formatting services for the class STR. -- Version 1.0 Sep 98. Copyright K Hopper, U of Waikato -- Development History -- ------------------- -- Date Who By Detail -- ---- ------ ------ -- 22 Sep 98 kh Original from revised CHAR class is_str( str : STR ) : CONVERSION_RESULTS pre ~void(str.index_lib) post (result = CONVERSION_RESULTS::All_Right) or (result = CONVERSION_RESULTS::Empty) is -- This routine checks that the given string is a string! It returns -- the relevant result state. if str.size = 0 then return CONVERSION_RESULTS::Empty else return CONVERSION_RESULTS::All_Right end ; end ; build( loc_cursor : STR_CURSOR ) : SAME pre ~void(loc_cursor) and ~loc_cursor.is_done and ~void(index_lib) post true is -- This routine creates returns a copy of the string indicated by -- the cursor. return loc_cursor.get_remainder end ; create( str : STR ) : SAME pre ~void(str) post true is -- This is the creation routine from a string which is any of the -- abbreviations listed in the Name table. If the name table has not been -- read in this is done first. return str.copy end ; str( lib : LIBCHARS ) : STR pre ~void(lib) post result.size = size -- and the same in a different encoding! is -- This routine just returns the string formed by converting from self -- in the encoding given. res : SAME := convert(lib) ; res.priv_lib := REP_LIB_LIST::index(lib) ; return res end ; str : STR pre ~void(self) post true -- (result = self) is -- This routine just returns a copy of self. It is provided for -- consistency with other classes. return copy end ; fmt( format : ANCHORED_DESCR, lib : LIBCHARS ) : STR pre ~void(self) and ~void(format) and (format.width > 0) and ~void(lib) post ~void(result) is -- This routine returns self in accordance with the formatting -- instructions given in format. Note that the library of characters is -- not used. It is retained for commonality of syntax. res : STR ; if format.leading > size then res := STR::create(format.filler.char,lib).repeat( format.leading - size) else res := STR::create(lib) end ; return res + self + STR::create(format.filler.char,lib).repeat( format.trailing) end ; fmt( format : ANCHORED_DESCR ) : STR pre ~void(self) and ~void(format) and (format.width > 0) post ~void(result) is -- This routine returns self in accordance with the formatting -- instructions given in format. return fmt(format,LIBCHARS::default) end ; end ; -- STR_STR