gcc/ada/a-suenst.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                     ADA.STRINGS.UTF_ENCODING.STRINGS                 --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 -- This specification is derived from the Ada Reference Manual for use with --
  10 -- GNAT.  In accordance with the copyright of that document, you can freely --
  11 -- copy and modify this specification,  provided that if you redistribute a --
  12 -- modified version,  any changes that you have made are clearly indicated. --
  13 --                                                                          --
  14 ------------------------------------------------------------------------------
  15
  16 --  This is an Ada 2012 package defined in AI05-0137-1. It is used for encoding
  17 --  and decoding String values using UTF encodings. Note: this package is
  18 --  consistent with Ada 95, and may be included in Ada 95 implementations.
  19
  20 package Ada.Strings.UTF_Encoding.Strings is
  21    pragma Pure (Strings);
  22
  23    --  The encoding routines take a String as input and encode the result
  24    --  using the specified UTF encoding method. The result includes a BOM if
  25    --  the Output_BOM argument is set to True. All 256 values of type Character
  26    --  are valid, so Encoding_Error cannot be raised for string input data.
  27
  28    function Encode
  29      (Item          : String;
  30       Output_Scheme : Encoding_Scheme;
  31       Output_BOM    : Boolean  := False) return UTF_String;
  32    --  Encode String using UTF-8, UTF-16LE or UTF-16BE encoding as specified by
  33    --  the Output_Scheme parameter.
  34
  35    function Encode
  36      (Item       : String;
  37       Output_BOM : Boolean  := False) return UTF_8_String;
  38    --  Encode String using UTF-8 encoding
  39
  40    function Encode
  41      (Item       : String;
  42       Output_BOM : Boolean  := False) return UTF_16_Wide_String;
  43    --  Encode String using UTF_16 encoding
  44
  45    --  The decoding routines take a UTF String as input, and return a decoded
  46    --  Wide_String. If the UTF String starts with a BOM that matches the
  47    --  encoding method, it is ignored. An incorrect BOM raises Encoding_Error,
  48    --  as does a code out of range of type Character.
  49
  50    function Decode
  51      (Item         : UTF_String;
  52       Input_Scheme : Encoding_Scheme) return String;
  53    --  The input is encoded in UTF_8, UTF_16LE or UTF_16BE as specified by the
  54    --  Input_Scheme parameter. It is decoded and returned as a String value.
  55    --  Note: a convenient form for scheme may be Encoding (UTF_String).
  56
  57    function Decode
  58      (Item : UTF_8_String) return String;
  59    --  The input is encoded in UTF-8 and returned as a String value
  60
  61    function Decode
  62      (Item : UTF_16_Wide_String) return String;
  63    --  The input is encoded in UTF-16 and returned as a String value
  64
  65 end Ada.Strings.UTF_Encoding.Strings;