LazUnicode unit

Provides encoding-agnostic Unicode string manipulation functions and an enumerator.

lazunicode.pas provides encoding-agnostic Unicode string manipulation functions and an enumerator. It works transparently with UTF-8 and UTF-16 encodings, and allows one codebase to work for:

Lazarus using its default UTF-8 encoding
Future FPC and Lazarus versions with Delphi compatible UTF-16 encoding
Delphi compatibility where String is defined as UnicodeString

Behavior of helper functions are altered using the

{$ModeSwitch 
UnicodeStrings}

directive; the correct routines for handling UTF-8 or UTF-16 are called based on the mode switch value.

lazunicode.pas is part of the LazUtils package.

Classes and records

`TCodePointEnumerator`	class	Base class for a Unicode codepoint enumerator.
`TUnicodeCharacterEnumerator`	class	Implements an enumerator for Unicode codepoints.
`TUnicodeEnumeratorBase`	class	Base class for a Unicode character enumerator.

Procedures and functions

`CodePointCopy`	function	Copies the specified number of codepoints starting at a character position.
`CodePointLength`	function	Gets the number of codepoints in the specified string.
`CodePointPos`	function	Gets the position where the search value is found in a string.
`CodePointSize`	function	Gets the number of bytes needed for a CodePoint in the specified value.
`enumerator(string):TUnicodeCharacterEnumerator`	operator	Enumerator which combines diacritical marks.
`IsCombining`	function	Determines if the specified value is a combining codepoint.
`StringOfCodePoint`	function	Creates a string with the specified number of codepoints.
`UnicodeToWinCP`	function	Converts the specified value to the Windows system codepage.
`WinCPToUnicode`	function	Converts the specified string to Unicode.

Uses

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.