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------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- ADA.STRINGS.UTF_ENCODING.WIDE_STRINGS -- -- -- -- S p e c -- -- -- -- This specification is derived from the Ada Reference Manual for use with -- -- GNAT. In accordance with the copyright of that document, you can freely -- -- copy and modify this specification, provided that if you redistribute a -- -- modified version, any changes that you have made are clearly indicated. -- -- -- ------------------------------------------------------------------------------ -- This is an Ada 2012 package defined in AI05-0137-1. It is used for encoding -- and decoding Wide_String values using UTF encodings. Note: this package is -- consistent with Ada 95, and may be included in Ada 95 implementations. package Ada.Strings.UTF_Encoding.Wide_Strings is pragma Pure (Wide_Strings); -- The encoding routines take a Wide_String as input and encode the result -- using the specified UTF encoding method. The result includes a BOM if -- the Output_BOM argument is set to True. Encoding_Error is raised if an -- invalid character appears in the input. In particular the characters -- in the range 16#D800# .. 16#DFFF# are invalid because they conflict -- with UTF-16 surrogate encodings, and the characters 16#FFFE# and -- 16#FFFF# are also invalid because they conflict with BOM codes. function Encode (Item : Wide_String; Output_Scheme : Encoding_Scheme; Output_BOM : Boolean := False) return UTF_String; -- Encode Wide_String using UTF-8, UTF-16LE or UTF-16BE encoding as -- specified by the Output_Scheme parameter. function Encode (Item : Wide_String; Output_BOM : Boolean := False) return UTF_8_String; -- Encode Wide_String using UTF-8 encoding function Encode (Item : Wide_String; Output_BOM : Boolean := False) return UTF_16_Wide_String; -- Encode Wide_String using UTF_16 encoding -- The decoding routines take a UTF String as input, and return a decoded -- Wide_String. If the UTF String starts with a BOM that matches the -- encoding method, it is ignored. An incorrect BOM raises Encoding_Error. function Decode (Item : UTF_String; Input_Scheme : Encoding_Scheme) return Wide_String; -- The input is encoded in UTF_8, UTF_16LE or UTF_16BE as specified by the -- Input_Scheme parameter. It is decoded and returned as a Wide_String -- value. Note: a convenient form for scheme may be Encoding (UTF_String). function Decode (Item : UTF_8_String) return Wide_String; -- The input is encoded in UTF-8 and returned as a Wide_String value function Decode (Item : UTF_16_Wide_String) return Wide_String; -- The input is encoded in UTF-16 and returned as a Wide_String value end Ada.Strings.UTF_Encoding.Wide_Strings;
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