hyung-hwan
ef734a5bc1
Use Wide_Character'First instead of Wide_Character'Val(0) Removed the terminator parameter in the H3.Strings
111 lines
3.2 KiB
Ada
111 lines
3.2 KiB
Ada
with System.UTF_32; -- TOOD: remove dependency on this package. create a seperate unicode package.
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package body H3.CC is
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package UC renames System.UTF_32;
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use type System.UTF_32.Category;
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SP: constant Item_Type := Item_Type'Val(32);
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HT: constant Item_Type := Item_Type'Val(9);
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function Is_Alpha (V: in Item_Type) return Boolean is
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begin
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return UC.Is_UTF_32_Letter(Item_Type'Pos(V));
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end Is_Alpha;
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function Is_Alnum (V: in Item_Type) return Boolean is
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begin
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return UC.Is_UTF_32_Letter(Item_Type'Pos(V)) or else
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UC.Is_UTF_32_Digit(Item_Type'Pos(V));
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end Is_Alnum;
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function Is_Blank (V: in Item_Type) return Boolean is
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begin
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return V = SP or else V = HT;
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end Is_Blank;
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function Is_Cntrl (V: in Item_Type) return Boolean is
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begin
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return UC.Get_Category(Item_Type'Pos(V)) = UC.Cc;
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end Is_Cntrl;
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function Is_Digit (V: in Item_Type) return Boolean is
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begin
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return UC.Is_UTF_32_Digit(Item_Type'Pos(V));
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end Is_Digit;
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function Is_Graph (V: in Item_Type) return Boolean is
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begin
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return Is_Print(V) and then V /= SP;
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end Is_Graph;
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function Is_Lower (V: in Item_Type) return Boolean is
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begin
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return UC.Get_Category(Item_Type'Pos(V)) = UC.Ll;
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end Is_Lower;
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function Is_Print (V: in Item_Type) return Boolean is
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begin
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return not UC.IS_UTF_32_Non_Graphic(Item_Type'Pos(V));
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end Is_Print;
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function Is_Punct (V: in Item_Type) return Boolean is
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begin
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--return UC.Is_UTF_32_Punctuation(Item_Type'Pos(V));
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return Is_Print(V) and then not Is_Space(V) and then not Is_Alnum(V);
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end Is_Punct;
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function Is_Space (V: in Item_Type) return Boolean is
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begin
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return UC.Is_UTF_32_Space(Item_Type'Pos(V)) or else
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UC.Is_UTF_32_Line_Terminator(Item_Type'Pos(V)) or else
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V = HT;
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end Is_Space;
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function Is_Upper (V: in Item_Type) return Boolean is
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begin
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return UC.Get_Category(Item_Type'Pos(V)) = UC.Lu;
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end Is_Upper;
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function Is_Xdigit (V: in Item_Type) return Boolean is
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begin
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return UC.Is_UTF_32_Digit(Item_Type'Pos(V)) or else
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Item_Type'Pos(V) in System_Character'Pos('A') .. System_Character'Pos('F') or else
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Item_Type'Pos(V) in System_Character'Pos('a') .. System_Character'Pos('f');
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end Is_Xdigit;
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function To_Lower (V: in Item_Type) return Item_Type is
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begin
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return Item_Type'Val(UC.UTF_32_To_Lower_Case(Item_Type'Pos(V)));
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end To_Lower;
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function To_Upper (V: in Item_Type) return Item_Type is
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begin
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return Item_Type'Val(UC.UTF_32_To_Upper_Case(Item_Type'Pos(V)));
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end To_Upper;
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function Is_Class (V: in Item_Type; Cls: in Class) return Boolean is
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begin
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case Cls is
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when ALPHA => return Is_Alpha(V);
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when ALNUM => return Is_Alnum(V);
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when BLANK => return Is_Blank(V);
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when CNTRL => return Is_Cntrl(V);
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when DIGIT => return Is_Digit(V);
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when GRAPH => return Is_Graph(V);
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when LOWER => return Is_Lower(V);
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when PRINT => return Is_Print(V);
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when PUNCT => return Is_Punct(V);
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when SPACE => return Is_Space(V);
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when UPPER => return Is_Upper(V);
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when XDIGIT => return Is_Xdigit(V);
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end case;
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end Is_Class;
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function Is_Code (V: in Item_Type; Code: in Item_Code) return Boolean is
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begin
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-- a clumsy way to work around strong type checking
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-- with unknown Item_Type at the generic level?
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return Item_Type'Pos(V) = Code;
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end Is_Code;
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end H3.CC; |