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lightning-sunbird  0.9+nobinonly
w2a.cpp
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00001 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
00002  *
00003  * ***** BEGIN LICENSE BLOCK *****
00004  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00005  *
00006  * The contents of this file are subject to the Mozilla Public License Version
00007  * 1.1 (the "License"); you may not use this file except in compliance with
00008  * the License. You may obtain a copy of the License at
00009  * http://www.mozilla.org/MPL/
00010  *
00011  * Software distributed under the License is distributed on an "AS IS" basis,
00012  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00013  * for the specific language governing rights and limitations under the
00014  * License.
00015  *
00016  * The Original Code is mozilla.org code, released
00017  * Jan 28, 2003.
00018  *
00019  * The Initial Developer of the Original Code is
00020  * Netscape Communications Corporation.
00021  * Portions created by the Initial Developer are Copyright (C) 2003
00022  * the Initial Developer. All Rights Reserved.
00023  *
00024  * Contributor(s):
00025  *   Garrett Arch Blythe, 28-January-2003
00026  *
00027  * Alternatively, the contents of this file may be used under the terms of
00028  * either the GNU General Public License Version 2 or later (the "GPL"), or
00029  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00030  * in which case the provisions of the GPL or the LGPL are applicable instead
00031  * of those above. If you wish to allow use of your version of this file only
00032  * under the terms of either the GPL or the LGPL, and not to allow others to
00033  * use your version of this file under the terms of the MPL, indicate your
00034  * decision by deleting the provisions above and replace them with the notice
00035  * and other provisions required by the GPL or the LGPL. If you do not delete
00036  * the provisions above, a recipient may use your version of this file under
00037  * the terms of any one of the MPL, the GPL or the LGPL.
00038  *
00039  * ***** END LICENSE BLOCK ***** */
00040 
00041 #include "mozce_internal.h"
00042 
00043 int w2a_buffer(const unsigned short* inWideString, int inWideChars, char* outACPString, int inACPChars)
00044 {
00045     int retval = 0;
00046 
00047     /*
00048     **  Start off by terminating the out argument if appropriate.
00049     */
00050     if(NULL != outACPString && 0 != inACPChars)
00051     {
00052         *outACPString = '\0';
00053     }
00054 
00055     /*
00056     **  Sanity check arguments.
00057     */
00058     if(NULL != inWideString && 0 != inWideChars && (0 == inACPChars || NULL != outACPString))
00059     {
00060         /*
00061         **  Attempt the conversion.
00062         */
00063         retval = WideCharToMultiByte(
00064                                      CP_ACP,
00065                                      0,
00066                                      inWideString,
00067                                      inWideChars,
00068                                      outACPString,
00069                                      inACPChars,
00070                                      NULL,
00071                                      NULL
00072                                      );
00073     }
00074 
00075     return retval;
00076 }
00077 
00078 
00079 char* w2a_malloc(const unsigned short* inWideString, int inWideChars, int* outACPChars)
00080 {
00081     LPSTR retval = NULL;
00082 
00083     /*
00084     **  Initialize any out arguments.
00085     */
00086     if(NULL != outACPChars)
00087     {
00088         *outACPChars = 0;
00089     }
00090 
00091     /*
00092     **  Initialize the wide char length if requested.
00093     **  We do this here to avoid doing it twice in calls to w2a_buffer.
00094     */
00095     if(-1 == inWideChars)
00096     {
00097         if(NULL != inWideString)
00098         {
00099             /*
00100             **  Plus one so the terminating character is included.
00101             */
00102             inWideChars = (int)wcslen(inWideString) + 1;
00103         }
00104         else
00105         {
00106             inWideChars = 0;
00107         }
00108     }
00109 
00110     /*
00111     **  Sanity check arguments.
00112     */
00113     if(NULL != inWideString && 0 != inWideChars)
00114     {
00115         int charsRequired = 0;
00116 
00117         /*
00118         **  Determine the size of buffer required for the conversion.
00119         */
00120         charsRequired = w2a_buffer(inWideString, inWideChars, NULL, 0);
00121         if(0 != charsRequired)
00122         {
00123             LPSTR heapBuffer = NULL;
00124 
00125             heapBuffer = (LPSTR)malloc((size_t)charsRequired * sizeof(CHAR));
00126             if(NULL != heapBuffer)
00127             {
00128                 int acpChars = 0;
00129 
00130                 /*
00131                 **  Real thing this time.
00132                 */
00133                 acpChars = w2a_buffer(inWideString, inWideChars, heapBuffer, charsRequired);
00134                 if(0 != acpChars)
00135                 {
00136                     retval = heapBuffer;
00137                     if(NULL != outACPChars)
00138                     {
00139                         *outACPChars = acpChars;
00140                     }
00141                 }
00142                 else
00143                 {
00144                     /*
00145                     **  Something wrong.
00146                     **  Clean up.
00147                     */
00148                     free(heapBuffer);
00149                 }
00150             }
00151         }
00152     }
00153 
00154     return retval;
00155 }