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Length: 21504 (0x5400)
Types: Ada Source
Notes: 03_class, FILE, R1k_Segment, e3_tag, package body Character_Utilities, seg_04796f
└─⟦8527c1e9b⟧ Bits:30000544 8mm tape, Rational 1000, Arrival backup of disks in PAM's R1000
└─ ⟦5a81ac88f⟧ »Space Info Vol 1«
└─⟦this⟧
package body Character_Utilities is
-- <!DOCTYPE ADA>
-- <ADA>
--------------------------------------------------------------------------------
-- <PROLOGUE>
-- <UNIT> Character_Utilities
--
-- <DESCRIPTION> This package defines subtypes and operations for working with
-- ASCII characters.
--
-- <HISTORY>
--
-- <ORIGIN>
-- <AUTHOR> David Blanchard and Peter A. Berggren
-- <DATE> 12 July 1989
--
-- <COMPANY> Science Applications International Corporation
-- <ADDRESS> 311 Park Place Boulevard, Suite 360
-- <ADDRESS> Clearwater, Florida 34619
--
-- <REMARK> The specification of this package was derived from "Software
-- Components with Ada", by Grady Booch.
-- Developed for the STARS program under task IR20.
-- </ORIGIN>
--
-- </HISTORY>
--
-- <NOTES> Dependencies =>
-- ( Operating_System => None ,
-- Compiler => None ,
-- Device => None ) ;
--
-- <copyright notice>
-- This component was derived from specifications described in the book,
-- "Software Components with Ada", by Grady Booch.
--
--
-- </PROLOGUE>
--------------------------------------------------------------------------------
The_Case_Offset : constant := Character'Pos ('a') - Character'Pos ('A');
--
-- The constant The_Case_Offset defines the offset from the uppercase character
-- set to the lowercase character set.
--
procedure Make_Uppercase (The_Character : in out Character) is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Make_Uppercase
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Make_Uppercase
The_Character := Uppercase_Of (The_Character => The_Character);
end Make_Uppercase;
procedure Make_Lowercase (The_Character : in out Character) is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Make_Lowercase
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Make_Lowercase
The_Character := Lowercase_Of (The_Character => The_Character);
end Make_Lowercase;
function Uppercase_Of (The_Character : in Character) return Character is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Uppercase_Of
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Uppercase_Of
if Is_Lowercase (The_Character => The_Character) then
return Character'Val
(Character'Pos (The_Character) - The_Case_Offset);
else
return The_Character;
end if;
end Uppercase_Of;
function Lowercase_Of (The_Character : in Character) return Character is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Lowercase_Of
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Lowercase_Of
if Is_Uppercase (The_Character => The_Character) then
return Character'Val
(Character'Pos (The_Character) + The_Case_Offset);
else
return The_Character;
end if;
end Lowercase_Of;
function Is_Control (The_Character : in Character) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Control
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Control
return The_Character in Control_Character;
end Is_Control;
function Is_Graphic (The_Character : in Character) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Graphic
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Graphic
return The_Character in Graphic_Character;
end Is_Graphic;
function Is_Uppercase (The_Character : in Character) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Uppercase
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Uppercase
return The_Character in Uppercase_Character;
end Is_Uppercase;
function Is_Lowercase (The_Character : in Character) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Lowercase
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Lowercase
return The_Character in Lowercase_Character;
end Is_Lowercase;
function Is_Digit (The_Character : in Character) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Digit
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Digit
return The_Character in Digit_Character;
end Is_Digit;
function Is_Alphabetic (The_Character : in Character) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Alphabetic
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Alphabetic
return Is_Uppercase (The_Character => The_Character) or else
Is_Lowercase (The_Character => The_Character);
end Is_Alphabetic;
function Is_Alphanumeric (The_Character : in Character) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Alphanumeric
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Alphanumeric
return Is_Alphabetic (The_Character => The_Character) or else
Is_Digit (The_Character => The_Character);
end Is_Alphanumeric;
function Is_Special (The_Character : in Character) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Special
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Special
return Is_Graphic (The_Character => The_Character) and then
not Is_Alphanumeric (The_Character => The_Character);
end Is_Special;
function Value_Of (The_Character : in Character) return Digit is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Value_Of
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Value_Of
if Is_Digit (The_Character => The_Character) then
return Character'Pos (The_Character) - Character'Pos ('0');
else
raise Lexical_Error;
end if;
end Value_Of;
function Image_Of (The_Digit : in Digit) return Character is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Image_Of
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Image_Of
return Character'Val (Character'Pos ('0') + The_Digit);
end Image_Of;
function Index_Of (The_Character : in Character) return Letter is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Index_Of
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Index_Of
if Is_Uppercase (The_Character => The_Character) then
return Character'Pos (The_Character) - Character'Pos ('A') + 1;
elsif Is_Lowercase (The_Character => The_Character) then
return Character'Pos (The_Character) - Character'Pos ('a') + 1;
else
raise Lexical_Error;
end if;
end Index_Of;
function Uppercase_Of (The_Letter : in Letter) return Character is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Uppercase_Of
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Uppercase_Of
return Character'Val (Character'Pos ('A') + The_Letter - 1);
end Uppercase_Of;
function Lowercase_Of (The_Letter : in Letter) return Character is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Lowercase_Of
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Lowercase_Of
return Character'Val (Character'Pos ('a') + The_Letter - 1);
end Lowercase_Of;
function Is_Equal (Left : in Character;
Right : in Character;
Case_Sensitive : in Boolean := True) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Equal
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Equal
if Case_Sensitive then
return Left = Right;
else
return Uppercase_Of (The_Character => Left) =
Uppercase_Of (The_Character => Right);
end if;
end Is_Equal;
function Is_Less_Than
(Left : in Character;
Right : in Character;
Case_Sensitive : in Boolean := True) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Less_Than
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Less_Than
if Case_Sensitive then
return Left < Right;
else
return Uppercase_Of (The_Character => Left) <
Uppercase_Of (The_Character => Right);
end if;
end Is_Less_Than;
function Is_Greater_Than
(Left : in Character;
Right : in Character;
Case_Sensitive : in Boolean := True) return Boolean is
--------------------------------------------------------------------------------
-- <SUBPROGRAM>
-- <UNIT> Is_Greater_Than
--
-- <DESCRIPTION> For a complete description of this subprogram see the
-- specification of this package.
--
-- <EXCEPTIONS> For a complete description of the exceptions raised by this
-- subprogram see the specification of this package.
--
-- </SUBPROGRAM>
--------------------------------------------------------------------------------
begin -- Is_Greater_Than
if Case_Sensitive then
return Left > Right;
else
return Uppercase_Of (The_Character => Left) >
Uppercase_Of (The_Character => Right);
end if;
end Is_Greater_Than;
end Character_Utilities;
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