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UTransform.d

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00001 /*******************************************************************************
00002 
00003         @file UTransform.d
00004         
00005         Copyright (c) 2004 Kris Bell
00006         
00007         This software is provided 'as-is', without any express or implied
00008         warranty. In no event will the authors be held liable for damages
00009         of any kind arising from the use of this software.
00010         
00011         Permission is hereby granted to anyone to use this software for any 
00012         purpose, including commercial applications, and to alter it and/or 
00013         redistribute it freely, subject to the following restrictions:
00014         
00015         1. The origin of this software must not be misrepresented; you must 
00016            not claim that you wrote the original software. If you use this 
00017            software in a product, an acknowledgment within documentation of 
00018            said product would be appreciated but is not required.
00019 
00020         2. Altered source versions must be plainly marked as such, and must 
00021            not be misrepresented as being the original software.
00022 
00023         3. This notice may not be removed or altered from any distribution
00024            of the source.
00025 
00026         4. Derivative works are permitted, but they must carry this notice
00027            in full and credit the original source.
00028 
00029 
00030                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00031 
00032 
00033         @version        Initial version, November 2004      
00034         @author         Kris
00035 
00036         Note that this package and documentation is built around the ICU 
00037         project (http://oss.software.ibm.com/icu/). Below is the license 
00038         statement as specified by that software:
00039 
00040 
00041                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00042 
00043 
00044         ICU License - ICU 1.8.1 and later
00045 
00046         COPYRIGHT AND PERMISSION NOTICE
00047 
00048         Copyright (c) 1995-2003 International Business Machines Corporation and 
00049         others.
00050 
00051         All rights reserved.
00052 
00053         Permission is hereby granted, free of charge, to any person obtaining a
00054         copy of this software and associated documentation files (the
00055         "Software"), to deal in the Software without restriction, including
00056         without limitation the rights to use, copy, modify, merge, publish,
00057         distribute, and/or sell copies of the Software, and to permit persons
00058         to whom the Software is furnished to do so, provided that the above
00059         copyright notice(s) and this permission notice appear in all copies of
00060         the Software and that both the above copyright notice(s) and this
00061         permission notice appear in supporting documentation.
00062 
00063         THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
00064         OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00065         MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
00066         OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
00067         HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
00068         INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
00069         FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
00070         NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
00071         WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
00072 
00073         Except as contained in this notice, the name of a copyright holder
00074         shall not be used in advertising or otherwise to promote the sale, use
00075         or other dealings in this Software without prior written authorization
00076         of the copyright holder.
00077 
00078         ----------------------------------------------------------------------
00079 
00080         All trademarks and registered trademarks mentioned herein are the 
00081         property of their respective owners.
00082 
00083 *******************************************************************************/
00084 
00085 module mango.icu.UTransform;
00086 
00087 private import  mango.icu.ICU,
00088                 mango.icu.UString;
00089 
00090 /*******************************************************************************
00091 
00092         See <A HREF="http://oss.software.ibm.com/icu/apiref/utrans_8h.html">
00093         this page</A> for full details.
00094 
00095 *******************************************************************************/
00096 
00097 class UTransform : ICU
00098 {       
00099         private Handle handle;
00100 
00101         enum    Direction
00102                 {
00103                 Forward,
00104                 Reverse
00105                 }
00106 
00107 
00108         /***********************************************************************
00109 
00110         ***********************************************************************/
00111 
00112         this (UText id)
00113         {
00114                 Error e;
00115 
00116                 handle = utrans_openU (id.get(), id.len, 0, null, 0, null, e);
00117                 testError (e, "failed to open ID transform");
00118         }
00119 
00120         /***********************************************************************
00121 
00122         ***********************************************************************/
00123 
00124         this (UText rule, Direction dir)
00125         {
00126                 Error e;
00127 
00128                 handle = utrans_openU (null, 0, dir, rule.get(), rule.len, null, e);
00129                 testError (e, "failed to open rule-based transform");
00130         }
00131 
00132         /***********************************************************************
00133         
00134         ***********************************************************************/
00135 
00136         ~this ()
00137         {
00138                 utrans_close (handle);
00139         }
00140 
00141         /***********************************************************************
00142 
00143         ***********************************************************************/
00144 
00145         UText getID ()
00146         {
00147                 uint len;
00148                 wchar *s = utrans_getUnicodeID (handle, len);
00149                 return new UText (s[0..len]);
00150         }
00151 
00152         /***********************************************************************
00153 
00154         ***********************************************************************/
00155 
00156         UTransform setFilter (UText filter)
00157         {
00158                 Error e;
00159 
00160                 if (filter.length)
00161                     utrans_setFilter (handle, filter.get, filter.len, e);
00162                 else
00163                    utrans_setFilter (handle, null, 0, e);
00164                    
00165                 testError (e, "failed to set transform filter");
00166                 return this;
00167         }
00168 
00169         /***********************************************************************
00170 
00171         ***********************************************************************/
00172 
00173         UTransform execute (UString text)
00174         {
00175                 Error   e;
00176                 uint    textLen = text.len;
00177 
00178                 utrans_transUChars (handle, text.get, &textLen, text.content.length, 0, &text.len, e);
00179                 testError (e, "failed to execute transform");
00180                 return this;
00181         }
00182 
00183        
00184 
00185         /***********************************************************************
00186         
00187                 Bind the ICU functions from a shared library. This is
00188                 complicated by the issues regarding D and DLLs on the
00189                 Windows platform
00190 
00191         ***********************************************************************/
00192 
00193         private static void* library;
00194 
00195         /***********************************************************************
00196 
00197         ***********************************************************************/
00198 
00199         private static extern (C) 
00200         {
00201                 Handle  function (wchar*, uint, uint, wchar*, uint, void*, inout Error) utrans_openU;
00202                 void    function (Handle) utrans_close;
00203                 wchar*  function (Handle, inout uint) utrans_getUnicodeID;
00204                 void    function (Handle, wchar*, uint, inout Error) utrans_setFilter;
00205                 void    function (Handle, wchar*, uint*, uint, uint, uint*, inout Error) utrans_transUChars;
00206         }
00207 
00208         /***********************************************************************
00209 
00210         ***********************************************************************/
00211 
00212         static  FunctionLoader.Bind[] targets = 
00213                 [
00214                 {cast(void**) &utrans_openU,            "utrans_openU"}, 
00215                 {cast(void**) &utrans_close,            "utrans_close"},
00216                 {cast(void**) &utrans_getUnicodeID,     "utrans_getUnicodeID"},
00217                 {cast(void**) &utrans_setFilter,        "utrans_setFilter"},
00218                 {cast(void**) &utrans_transUChars,      "utrans_transUChars"},
00219                 ];
00220 
00221         /***********************************************************************
00222 
00223         ***********************************************************************/
00224 
00225         static this ()
00226         {
00227                 library = FunctionLoader.bind (icuin, targets);
00228         }
00229 
00230         /***********************************************************************
00231 
00232         ***********************************************************************/
00233 
00234         static ~this ()
00235         {
00236                 FunctionLoader.unbind (library);
00237         }
00238 }
00239 

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