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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;