<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ --> <title>Data/Text/Encoding/Utf16.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE MagicHash #-}</span> <a name="line-2"></a> <a name="line-3"></a><span class='hs-comment'>-- |</span> <a name="line-4"></a><span class='hs-comment'>-- Module : Data.Text.Encoding.Utf16</span> <a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) 2008, 2009 Tom Harper,</span> <a name="line-6"></a><span class='hs-comment'>-- (c) 2009 Bryan O'Sullivan,</span> <a name="line-7"></a><span class='hs-comment'>-- (c) 2009 Duncan Coutts</span> <a name="line-8"></a><span class='hs-comment'>--</span> <a name="line-9"></a><span class='hs-comment'>-- License : BSD-style</span> <a name="line-10"></a><span class='hs-comment'>-- Maintainer : bos@serpentine.com, rtomharper@googlemail.com,</span> <a name="line-11"></a><span class='hs-comment'>-- duncan@haskell.org</span> <a name="line-12"></a><span class='hs-comment'>-- Stability : experimental</span> <a name="line-13"></a><span class='hs-comment'>-- Portability : GHC</span> <a name="line-14"></a><span class='hs-comment'>--</span> <a name="line-15"></a><span class='hs-comment'>-- Basic UTF-16 validation and character manipulation.</span> <a name="line-16"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Encoding</span><span class='hs-varop'>.</span><span class='hs-conid'>Utf16</span> <a name="line-17"></a> <span class='hs-layout'>(</span> <a name="line-18"></a> <span class='hs-varid'>chr2</span> <a name="line-19"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>validate1</span> <a name="line-20"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>validate2</span> <a name="line-21"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-22"></a> <a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Exts</span> <a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span> <span class='hs-layout'>(</span><span class='hs-conid'>Word16</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-25"></a> <a name="line-26"></a><a name="chr2"></a><span class='hs-definition'>chr2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word16</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word16</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <a name="line-27"></a><span class='hs-definition'>chr2</span> <span class='hs-layout'>(</span><span class='hs-conid'>W16</span><span class='hs-cpp'>#</span> <span class='hs-varid'>a</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>W16</span><span class='hs-cpp'>#</span> <span class='hs-varid'>b</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-cpp'>#</span> <span class='hs-layout'>(</span><span class='hs-varid'>chr</span><span class='hs-cpp'>#</span> <span class='hs-layout'>(</span><span class='hs-varid'>upper</span><span class='hs-cpp'>#</span> <span class='hs-varop'>+#</span> <span class='hs-varid'>lower</span><span class='hs-cpp'>#</span> <span class='hs-varop'>+#</span> <span class='hs-num'>0x10000</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-28"></a> <span class='hs-keyword'>where</span> <a name="line-29"></a> <span class='hs-varop'>!</span><span class='hs-varid'>x</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>word2Int</span><span class='hs-cpp'>#</span> <span class='hs-varid'>a</span><span class='hs-cpp'>#</span> <a name="line-30"></a> <span class='hs-varop'>!</span><span class='hs-varid'>y</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>word2Int</span><span class='hs-cpp'>#</span> <span class='hs-varid'>b</span><span class='hs-cpp'>#</span> <a name="line-31"></a> <span class='hs-varop'>!</span><span class='hs-varid'>upper</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>uncheckedIShiftL</span><span class='hs-cpp'>#</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-cpp'>#</span> <span class='hs-varop'>-#</span> <span class='hs-num'>0xD800</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-num'>10</span><span class='hs-cpp'>#</span> <a name="line-32"></a> <span class='hs-varop'>!</span><span class='hs-varid'>lower</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>y</span><span class='hs-cpp'>#</span> <span class='hs-varop'>-#</span> <span class='hs-num'>0xDC00</span><span class='hs-cpp'>#</span> <a name="line-33"></a><span class='hs-comment'>{-# INLINE chr2 #-}</span> <a name="line-34"></a> <a name="line-35"></a><a name="validate1"></a><span class='hs-definition'>validate1</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word16</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <a name="line-36"></a><span class='hs-definition'>validate1</span> <span class='hs-varid'>x1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x1</span> <span class='hs-varop'><</span> <span class='hs-num'>0xD800</span> <span class='hs-varop'>||</span> <span class='hs-varid'>x1</span> <span class='hs-varop'>></span> <span class='hs-num'>0xDFFF</span> <a name="line-37"></a><span class='hs-comment'>{-# INLINE validate1 #-}</span> <a name="line-38"></a> <a name="line-39"></a><a name="validate2"></a><span class='hs-definition'>validate2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word16</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word16</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <a name="line-40"></a><span class='hs-definition'>validate2</span> <span class='hs-varid'>x1</span> <span class='hs-varid'>x2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x1</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0xD800</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>x1</span> <span class='hs-varop'><=</span> <span class='hs-num'>0xDBFF</span> <span class='hs-varop'>&&</span> <a name="line-41"></a> <span class='hs-varid'>x2</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0xDC00</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>x2</span> <span class='hs-varop'><=</span> <span class='hs-num'>0xDFFF</span> <a name="line-42"></a><span class='hs-comment'>{-# INLINE validate2 #-}</span> </pre></body> </html>