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180 | -- Copyright (c) 1990 Regents of the University of California.
-- All rights reserved.
--
-- This software was developed by John Self of the Arcadia project
-- at the University of California, Irvine.
--
-- Redistribution and use in source and binary forms are permitted
-- provided that the above copyright notice and this paragraph are
-- duplicated in all such forms and that any documentation,
-- advertising materials, and other materials related to such
-- distribution and use acknowledge that the software was developed
-- by the University of California, Irvine. The name of the
-- University may not be used to endorse or promote products derived
-- from this software without specific prior written permission.
-- THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
-- IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
-- WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-- TITLE character classes routines
-- AUTHOR: John Self (UCI)
-- DESCRIPTION routines for character classes like [abc]
-- $Header: /dc/uc/self/arcadia/aflex/ada/src/RCS/cclB.a,v 1.7 1993/04/27 23:17:15 self Exp $
with Ada.Characters.Conversions;
with Ada.Strings.Unbounded;
with Ada.Strings.Wide_Wide_Maps;
with Misc;
package body CCL is
use Ada.Characters.Conversions;
use Ada.Strings.Unbounded;
use Ada.Strings.Wide_Wide_Maps;
use Ada.Wide_Wide_Text_IO;
-- ccladd - add a single character to a ccl
------------
-- CCLADD --
------------
procedure CCL_Add
(CCLP : Integer;
Ch : Unicode.Unicode_Character)
is
IND, LEN, NEWPOS : INTEGER;
begin
-- Check to see if the character is already in the ccl.
if Is_In (Ch, CCL_Sets (CCLP)) then
return;
end if;
CCL_Sets (CCLP) := CCL_Sets (CCLP) or To_Set (Ch);
LEN := CCLLEN(CCLP);
IND := CCLMAP(CCLP);
NEWPOS := IND + LEN;
if (NEWPOS >= Current_Max_CCL_Table_Size) then
Current_Max_CCL_Table_Size := Current_Max_CCL_Table_Size +
MAX_CCL_TBL_SIZE_INCREMENT;
NUM_REALLOCS := NUM_REALLOCS + 1;
Reallocate_Unicode_Character_Array
(CCLTBL, Current_Max_CCL_Table_Size);
end if;
CCLLEN(CCLP) := LEN + 1;
CCLTBL(NEWPOS) := CH;
end CCL_Add;
-- cclinit - make an empty ccl
function CCLINIT return INTEGER is
begin
LASTCCL := LASTCCL + 1;
if (LASTCCL >= CURRENT_MAXCCLS) then
CURRENT_MAXCCLS := CURRENT_MAXCCLS + MAX_CCLS_INCREMENT;
NUM_REALLOCS := NUM_REALLOCS + 1;
REALLOCATE_INTEGER_ARRAY(CCLMAP, CURRENT_MAXCCLS);
REALLOCATE_INTEGER_ARRAY(CCLLEN, CURRENT_MAXCCLS);
REALLOCATE_INTEGER_ARRAY(CCLNG, CURRENT_MAXCCLS);
Reallocate_Wide_Wide_Character_Set_Array (CCL_Sets, CURRENT_MAXCCLS);
end if;
if (LASTCCL = 1) then
-- we're making the first ccl
CCLMAP(LASTCCL) := 0;
else
-- the new pointer is just past the end of the last ccl. Since
-- the cclmap points to the \first/ character of a ccl, adding the
-- length of the ccl to the cclmap pointer will produce a cursor
-- to the first free space
CCLMAP(LASTCCL) := CCLMAP(LASTCCL - 1) + CCLLEN(LASTCCL - 1);
end if;
CCLLEN(LASTCCL) := 0;
CCLNG(LASTCCL) := 0;
-- ccl's start out life un-negated
return LASTCCL;
end CCLINIT;
-- cclnegate - negate a ccl
procedure CCLNEGATE(CCLP : in INTEGER) is
begin
CCLNG(CCLP) := 1;
end CCLNEGATE;
------------------------
-- List_Character_Set --
------------------------
-- list_character_set - list the members of a set of characters in CCL form
--
-- writes to the given file a character-class representation of those
-- characters present in the given set. A character is present if it
-- has a non-zero value in the set array.
procedure List_Character_Set
(File : Ada.Wide_Wide_Text_IO.File_Type;
CSET : C_SIZE_BOOL_ARRAY)
is
I, START_CHAR : INTEGER;
begin
PUT (File, '[');
I := 1;
while I <= CSIZE loop
if CSET (I) then
START_CHAR := I;
PUT (File, ' ');
PUT
(File,
To_Wide_Wide_String
(To_String
(MISC.Readable_Form (Wide_Wide_Character'Val (I)))));
I := I + 1;
while I <= CSIZE and then CSET(I) loop
I := I + 1;
end loop;
if (I - 1 > START_CHAR) then
-- this was a run
PUT (File, "-");
PUT
(File,
To_Wide_Wide_String
(To_String
(MISC.Readable_Form (Wide_Wide_Character'Val (I - 1)))));
end if;
PUT (File, ' ');
end if;
I := I + 1;
end loop;
PUT (File, ']');
end List_Character_Set;
end CCL;
|