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view base/src/java/mangoicu/UStringPrep.d @ 27:1bf55a6eb092
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author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 21 Mar 2009 11:33:57 +0100 |
parents | java/src/java/mangoicu/UStringPrep.d@dbfb303e8fb0 |
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/******************************************************************************* @file UStringPrep.d Copyright (c) 2004 Kris Bell This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for damages of any kind arising from the use of this software. Permission is hereby granted to anyone to use this software for any purpose, including commercial applications, and to alter it and/or redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment within documentation of said product would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any distribution of the source. 4. Derivative works are permitted, but they must carry this notice in full and credit the original source. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @version Initial version, November 2004 @author Kris Note that this package and documentation is built around the ICU project (http://oss.software.ibm.com/icu/). Below is the license statement as specified by that software: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ICU License - ICU 1.8.1 and later COPYRIGHT AND PERMISSION NOTICE Copyright (c) 1995-2003 International Business Machines Corporation and others. All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, provided that the above copyright notice(s) and this permission notice appear in all copies of the Software and that both the above copyright notice(s) and this permission notice appear in supporting documentation. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. Except as contained in this notice, the name of a copyright holder shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization of the copyright holder. ---------------------------------------------------------------------- All trademarks and registered trademarks mentioned herein are the property of their respective owners. *******************************************************************************/ module java.mangoicu.UStringPrep; private import java.mangoicu.ICU, java.mangoicu.UString; /******************************************************************************* StringPrep API implements the StingPrep framework as described by RFC 3454. StringPrep prepares Unicode strings for use in network protocols. Profiles of StingPrep are set of rules and data according to with the Unicode Strings are prepared. Each profiles contains tables which describe how a code point should be treated. The tables are broadly classied into - Unassinged Table: Contains code points that are unassigned in the Unicode Version supported by StringPrep. Currently RFC 3454 supports Unicode 3.2. - Prohibited Table: Contains code points that are prohibted from the output of the StringPrep processing function. - Mapping Table: Contains code ponts that are deleted from the output or case mapped. The procedure for preparing Unicode strings: 1. Map: For each character in the input, check if it has a mapping and, if so, replace it with its mapping. 2. Normalize: Possibly normalize the result of step 1 using Unicode normalization. 3. Prohibit: Check for any characters that are not allowed in the output. If any are found, return an error. 4. Check bidi: Possibly check for right-to-left characters, and if any are found, make sure that the whole string satisfies the requirements for bidirectional strings. If the string does not satisfy the requirements for bidirectional strings, return an error. See <A HREF="http://oss.software.ibm.com/icu/apiref/usprep_8h.html"> this page</A> for full details. *******************************************************************************/ class UStringPrep : ICU { private Handle handle; enum Options { Strict, Lenient } /*********************************************************************** Creates a StringPrep profile from the data file. path string containing the full path pointing to the directory where the profile reside followed by the package name e.g. "/usr/resource/my_app/profiles/mydata" on a Unix system. if NULL, ICU default data files will be used. fileName name of the profile file to be opened ***********************************************************************/ this (char[] path, char[] filename) { UErrorCode e; handle = usprep_open (toString(path), toString(filename), e); testError (e, "failed to open string-prep"); } /*********************************************************************** Close this profile ***********************************************************************/ ~this () { usprep_close (handle); } /*********************************************************************** Prepare the input buffer This operation maps, normalizes(NFKC), checks for prohited and BiDi characters in the order defined by RFC 3454 depending on the options specified in the profile ***********************************************************************/ void prepare (UStringView src, UString dst, Options o = Options.Strict) { uint fmt (wchar* p, uint len, inout UErrorCode e) { return usprep_prepare (handle, src.get.ptr, src.len, p, len, o, null, e); } dst.format (&fmt, "failed to prepare text"); } /*********************************************************************** Bind the ICU functions from a shared library. This is complicated by the issues regarding D and DLLs on the Windows platform ***********************************************************************/ private static void* library; /*********************************************************************** ***********************************************************************/ private static extern (C) { Handle function (char*, char*, inout UErrorCode) usprep_open; void function (Handle) usprep_close; uint function (Handle, wchar*, uint, wchar*, uint, uint, void*, inout UErrorCode) usprep_prepare; } /*********************************************************************** ***********************************************************************/ static FunctionLoader.Bind[] targets = [ {cast(void**) &usprep_open, "usprep_open"}, {cast(void**) &usprep_close, "usprep_close"}, {cast(void**) &usprep_prepare, "usprep_prepare"}, ]; /*********************************************************************** ***********************************************************************/ static this () { library = FunctionLoader.bind (icuuc, targets); } /*********************************************************************** ***********************************************************************/ static ~this () { FunctionLoader.unbind (library); } }