d563b9a596
Change-Id: I022f5ed37d25f2c8a8870033bab32ff59d4d8da6 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/97648 Tested-by: Jenkins Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
602 lines
22 KiB
C++
602 lines
22 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/config.h>
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#include <rtl/textcvt.h>
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#include "tenchelp.hxx"
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#include "unichars.hxx"
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/* ======================================================================= */
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unsigned char const aImplBase64Tab[64] =
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{
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/* A-Z */
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0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
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0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
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0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
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0x58, 0x59, 0x5A,
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/* a-z */
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0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
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0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
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0x78, 0x79, 0x7A,
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/* 0-9,+,/ */
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0x2B, 0x2F
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};
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/* Index in Base64Tab or 0xFF, when is an invalid character */
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unsigned char const aImplBase64IndexTab[128] =
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{
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x00-0x07 */
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x08-0x0F */
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x10-0x17 */
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x18-0x1F */
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x20-0x27 !"#$%&' */
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0xFF, 0xFF, 0xFF, 62, 0xFF, 0xFF, 0xFF, 63, /* 0x28-0x2F ()*+,-./ */
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52, 53, 54, 55, 56, 57, 58, 59, /* 0x30-0x37 01234567 */
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60, 61, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x38-0x3F 89:;<=>? */
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0xFF, 0, 1, 2, 3, 4, 5, 6, /* 0x40-0x47 @ABCDEFG */
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7, 8, 9, 10, 11, 12, 13, 14, /* 0x48-0x4F HIJKLMNO */
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15, 16, 17, 18, 19, 20, 21, 22, /* 0x50-0x57 PQRSTUVW */
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23, 24, 25, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* 0x58-0x5F XYZ[\]^_ */
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0xFF, 26, 27, 28, 29, 30, 31, 32, /* 0x60-0x67 `abcdefg */
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33, 34, 35, 36, 37, 38, 39, 40, /* 0x68-0x6F hijklmno */
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41, 42, 43, 44, 45, 46, 47, 48, /* 0x70-0x77 pqrstuvw */
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49, 50, 51, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF /* 0x78-0x7F xyz{|}~ */
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};
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unsigned char const aImplMustShiftTab[128] =
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{
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1, 1, 1, 1, 1, 1, 1, 1, /* 0x00-0x07 */
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1, 0, 0, 1, 0, 1, 1, 1, /* 0x08-0x0F 0x09 == HTAB, 0x0A == LF 0x0C == CR */
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1, 1, 1, 1, 1, 1, 1, 1, /* 0x10-0x17 */
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1, 1, 1, 1, 1, 1, 1, 1, /* 0x18-0x1F */
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0, 1, 1, 1, 1, 1, 1, 0, /* 0x20-0x27 !"#$%&' */
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0, 0, 1, 1, 0, 1, 0, 0, /* 0x28-0x2F ()*+,-./ */
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0, 0, 0, 0, 0, 0, 0, 0, /* 0x30-0x37 01234567 */
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0, 0, 0, 1, 1, 1, 1, 0, /* 0x38-0x3F 89:;<=>? */
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1, 0, 0, 0, 0, 0, 0, 0, /* 0x40-0x47 @ABCDEFG */
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0, 0, 0, 0, 0, 0, 0, 0, /* 0x48-0x4F HIJKLMNO */
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0, 0, 0, 0, 0, 0, 0, 0, /* 0x50-0x57 PQRSTUVW */
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0, 0, 0, 1, 1, 1, 1, 1, /* 0x58-0x5F XYZ[\]^_ */
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1, 0, 0, 0, 0, 0, 0, 0, /* 0x60-0x67 `abcdefg */
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0, 0, 0, 0, 0, 0, 0, 0, /* 0x68-0x6F hijklmno */
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0, 0, 0, 0, 0, 0, 0, 0, /* 0x70-0x77 pqrstuvw */
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0, 0, 0, 1, 1, 1, 1, 1 /* 0x78-0x7F xyz{|}~ */
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};
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/* + */
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#define IMPL_SHIFT_IN_CHAR 0x2B
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/* - */
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#define IMPL_SHIFT_OUT_CHAR 0x2D
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/* ----------------------------------------------------------------------- */
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namespace {
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struct ImplUTF7ToUCContextData
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{
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bool mbShifted;
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bool mbFirst;
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bool mbWroteOne;
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sal_uInt32 mnBitBuffer;
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sal_uInt32 mnBufferBits;
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};
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}
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/* ----------------------------------------------------------------------- */
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void* ImplUTF7CreateUTF7TextToUnicodeContext()
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{
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ImplUTF7ToUCContextData* pContextData = new ImplUTF7ToUCContextData;
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pContextData->mbShifted = false;
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pContextData->mbFirst = false;
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pContextData->mbWroteOne = false;
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pContextData->mnBitBuffer = 0;
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pContextData->mnBufferBits = 0;
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return pContextData;
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}
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/* ----------------------------------------------------------------------- */
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void ImplUTF7DestroyTextToUnicodeContext( void* pContext )
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{
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delete static_cast< ImplUTF7ToUCContextData * >(pContext);
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}
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/* ----------------------------------------------------------------------- */
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void ImplUTF7ResetTextToUnicodeContext( void* pContext )
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{
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ImplUTF7ToUCContextData* pContextData = static_cast<ImplUTF7ToUCContextData*>(pContext);
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pContextData->mbShifted = false;
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pContextData->mbFirst = false;
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pContextData->mbWroteOne = false;
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pContextData->mnBitBuffer = 0;
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pContextData->mnBufferBits = 0;
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}
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/* ----------------------------------------------------------------------- */
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sal_Size ImplUTF7ToUnicode( SAL_UNUSED_PARAMETER const void*, void* pContext,
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const char* pSrcBuf, sal_Size nSrcBytes,
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sal_Unicode* pDestBuf, sal_Size nDestChars,
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sal_uInt32 nFlags, sal_uInt32* pInfo,
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sal_Size* pSrcCvtBytes )
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{
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ImplUTF7ToUCContextData* pContextData = static_cast<ImplUTF7ToUCContextData*>(pContext);
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unsigned char c ='\0';
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unsigned char nBase64Value = 0;
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bool bEnd = false;
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bool bShifted;
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bool bFirst;
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bool bWroteOne;
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bool bBase64End;
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sal_uInt32 nBitBuffer;
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sal_uInt32 nBitBufferTemp;
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sal_uInt32 nBufferBits;
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sal_Unicode* pEndDestBuf;
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const char* pEndSrcBuf;
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/* !!! Implementation not finished !!!
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if ( pContextData )
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{
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bShifted = pContextData->mbShifted;
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bFirst = pContextData->mbFirst;
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bWroteOne = pContextData->mbWroteOne;
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nBitBuffer = pContextData->mnBitBuffer;
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nBufferBits = pContextData->mnBufferBits;
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}
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else
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*/
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{
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bShifted = false;
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bFirst = false;
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bWroteOne = false;
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nBitBuffer = 0;
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nBufferBits = 0;
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}
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*pInfo = 0;
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pEndDestBuf = pDestBuf+nDestChars;
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pEndSrcBuf = pSrcBuf+nSrcBytes;
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do
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{
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if ( pSrcBuf < pEndSrcBuf )
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{
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c = static_cast<unsigned char>(*pSrcBuf);
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/* End, when not a base64 character */
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bBase64End = false;
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if ( c <= 0x7F )
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{
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nBase64Value = aImplBase64IndexTab[c];
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if ( nBase64Value == 0xFF )
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bBase64End = true;
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}
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}
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else
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{
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bEnd = true;
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bBase64End = true;
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}
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if ( bShifted )
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{
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if ( bBase64End )
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{
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bShifted = false;
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/* If the character causing us to drop out was SHIFT_IN */
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/* or SHIFT_OUT, it may be a special escape for SHIFT_IN. */
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/* The test for SHIFT_IN is not necessary, but allows */
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/* an alternate form of UTF-7 where SHIFT_IN is escaped */
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/* by SHIFT_IN. This only works for some values of */
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/* SHIFT_IN. It is so implemented, because this comes */
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/* from the official unicode book (The Unicode Standard, */
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/* Version 2.0) and so I think, that someone of the */
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/* world has used this feature. */
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if ( !bEnd )
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{
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if ( (c == IMPL_SHIFT_IN_CHAR) || (c == IMPL_SHIFT_OUT_CHAR) )
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{
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/* If no base64 character, and the terminating */
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/* character of the shift sequence was the */
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/* SHIFT_OUT_CHAR, then it't a special escape */
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/* for SHIFT_IN_CHAR. */
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if ( bFirst && (c == IMPL_SHIFT_OUT_CHAR) )
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{
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if ( pDestBuf >= pEndDestBuf )
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{
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*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR | RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL;
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break;
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}
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*pDestBuf = IMPL_SHIFT_IN_CHAR;
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pDestBuf++;
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bWroteOne = true;
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}
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/* Skip character */
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pSrcBuf++;
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if ( pSrcBuf < pEndSrcBuf )
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c = static_cast<unsigned char>(*pSrcBuf);
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else
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bEnd = true;
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}
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}
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/* Empty sequence not allowed, so when we don't write one */
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/* valid char, then the sequence is corrupt */
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if ( !bWroteOne )
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{
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/* When no more bytes in the source buffer, then */
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/* this buffer may be too small */
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if ( bEnd )
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*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR | RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOOSMALL;
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else
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{
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*pInfo |= RTL_TEXTTOUNICODE_INFO_INVALID;
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if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK) == RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR )
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{
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if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0) {
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if (!bEnd) {
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++pSrcBuf;
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}
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} else {
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//TODO: move pSrcBuf back to a reasonable starting place
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}
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*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR;
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break;
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}
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/* We insert here no default char, because I think */
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/* this is better to ignore this */
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}
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}
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}
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else
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{
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/* Add 6 Bits from character to the bit buffer */
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nBufferBits += 6;
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nBitBuffer |= static_cast<sal_uInt32>(nBase64Value & 0x3F) << (32-nBufferBits);
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bFirst = false;
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}
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/* Extract as many full 16 bit characters as possible from the */
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/* bit buffer. */
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while ( (pDestBuf < pEndDestBuf) && (nBufferBits >= 16) )
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{
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nBitBufferTemp = nBitBuffer >> (32-16);
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*pDestBuf = static_cast<sal_Unicode>(nBitBufferTemp & 0xFFFF);
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pDestBuf++;
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nBitBuffer <<= 16;
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nBufferBits -= 16;
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bWroteOne = true;
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}
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if ( nBufferBits >= 16 )
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{
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*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR | RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL;
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break;
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}
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if ( bBase64End )
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{
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/* Sequence ended and we have some bits, then the */
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/* sequence is corrupted */
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if ( nBufferBits && nBitBuffer )
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{
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/* When no more bytes in the source buffer, then */
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/* this buffer may be too small */
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if ( bEnd )
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*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR | RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOOSMALL;
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else
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{
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*pInfo |= RTL_TEXTTOUNICODE_INFO_INVALID;
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if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK) == RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR )
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{
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if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0) {
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if (!bEnd) {
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++pSrcBuf;
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}
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} else {
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//TODO: move pSrcBuf back to a reasonable starting place
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}
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*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR;
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break;
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}
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if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK) != RTL_TEXTTOUNICODE_FLAGS_INVALID_IGNORE )
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{
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if ( pDestBuf >= pEndDestBuf )
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{
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*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR | RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL;
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break;
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}
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*pDestBuf++
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= RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER;
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}
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}
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}
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nBitBuffer = 0;
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nBufferBits = 0;
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}
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}
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if ( !bEnd )
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{
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if ( !bShifted )
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{
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if ( c == IMPL_SHIFT_IN_CHAR )
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{
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bShifted = true;
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bFirst = true;
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bWroteOne = false;
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}
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else
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{
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/* No direct encoded character, then the buffer is */
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/* corrupt */
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if ( c > 0x7F )
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{
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*pInfo |= RTL_TEXTTOUNICODE_INFO_INVALID;
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if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK) == RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR )
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{
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if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0) {
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++pSrcBuf;
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}
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*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR;
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break;
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}
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if ( (nFlags & RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK) != RTL_TEXTTOUNICODE_FLAGS_INVALID_IGNORE )
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{
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if ( pDestBuf >= pEndDestBuf )
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{
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*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR | RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL;
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break;
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}
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*pDestBuf++
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= RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER;
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}
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}
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else
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{
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/* Write char to unicode buffer */
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if ( pDestBuf >= pEndDestBuf )
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{
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*pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR | RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL;
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break;
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}
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*pDestBuf = c;
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pDestBuf++;
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}
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}
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}
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pSrcBuf++;
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}
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}
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while ( !bEnd );
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if ( pContextData )
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{
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pContextData->mbShifted = bShifted;
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pContextData->mbFirst = bFirst;
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pContextData->mbWroteOne = bWroteOne;
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pContextData->mnBitBuffer = nBitBuffer;
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pContextData->mnBufferBits = nBufferBits;
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}
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*pSrcCvtBytes = nSrcBytes - (pEndSrcBuf-pSrcBuf);
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return (nDestChars - (pEndDestBuf-pDestBuf));
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}
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/* ======================================================================= */
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namespace {
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struct ImplUTF7FromUCContextData
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{
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bool mbShifted;
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sal_uInt32 mnBitBuffer;
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sal_uInt32 mnBufferBits;
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};
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}
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/* ----------------------------------------------------------------------- */
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void* ImplUTF7CreateUnicodeToTextContext()
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{
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ImplUTF7FromUCContextData* pContextData = new ImplUTF7FromUCContextData;
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pContextData->mbShifted = false;
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pContextData->mnBitBuffer = 0;
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pContextData->mnBufferBits = 0;
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return pContextData;
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}
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/* ----------------------------------------------------------------------- */
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void ImplUTF7DestroyUnicodeToTextContext( void* pContext )
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{
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delete static_cast< ImplUTF7FromUCContextData * >(pContext);
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}
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/* ----------------------------------------------------------------------- */
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void ImplUTF7ResetUnicodeToTextContext( void* pContext )
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{
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ImplUTF7FromUCContextData* pContextData = static_cast<ImplUTF7FromUCContextData*>(pContext);
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pContextData->mbShifted = false;
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pContextData->mnBitBuffer = 0;
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pContextData->mnBufferBits = 0;
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}
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/* ----------------------------------------------------------------------- */
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sal_Size ImplUnicodeToUTF7( SAL_UNUSED_PARAMETER const void*, void* pContext,
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const sal_Unicode* pSrcBuf, sal_Size nSrcChars,
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char* pDestBuf, sal_Size nDestBytes,
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SAL_UNUSED_PARAMETER sal_uInt32, sal_uInt32* pInfo,
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sal_Size* pSrcCvtChars )
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{
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ImplUTF7FromUCContextData* pContextData = static_cast<ImplUTF7FromUCContextData*>(pContext);
|
|
sal_Unicode c = '\0';
|
|
bool bEnd = false;
|
|
bool bShifted;
|
|
bool bNeedShift;
|
|
sal_uInt32 nBitBuffer;
|
|
sal_uInt32 nBitBufferTemp;
|
|
sal_uInt32 nBufferBits;
|
|
char* pEndDestBuf;
|
|
const sal_Unicode* pEndSrcBuf;
|
|
|
|
/* !!! Implementation not finished !!!
|
|
if ( pContextData )
|
|
{
|
|
bShifted = pContextData->mbShifted;
|
|
nBitBuffer = pContextData->mnBitBuffer;
|
|
nBufferBits = pContextData->mnBufferBits;
|
|
}
|
|
else
|
|
*/
|
|
{
|
|
bShifted = false;
|
|
nBitBuffer = 0;
|
|
nBufferBits = 0;
|
|
}
|
|
|
|
*pInfo = 0;
|
|
pEndDestBuf = pDestBuf+nDestBytes;
|
|
pEndSrcBuf = pSrcBuf+nSrcChars;
|
|
do
|
|
{
|
|
if ( pSrcBuf < pEndSrcBuf )
|
|
{
|
|
c = *pSrcBuf;
|
|
|
|
bNeedShift = (c > 0x7F) || aImplMustShiftTab[c];
|
|
if ( bNeedShift && !bShifted )
|
|
{
|
|
if ( pDestBuf >= pEndDestBuf )
|
|
{
|
|
*pInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
|
|
break;
|
|
}
|
|
*pDestBuf = IMPL_SHIFT_IN_CHAR;
|
|
pDestBuf++;
|
|
/* Special case handling for SHIFT_IN_CHAR */
|
|
if ( c == IMPL_SHIFT_IN_CHAR )
|
|
{
|
|
if ( pDestBuf >= pEndDestBuf )
|
|
{
|
|
*pInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
|
|
break;
|
|
}
|
|
*pDestBuf = IMPL_SHIFT_OUT_CHAR;
|
|
pDestBuf++;
|
|
}
|
|
else
|
|
bShifted = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
bEnd = true;
|
|
bNeedShift = false;
|
|
}
|
|
|
|
if ( bShifted )
|
|
{
|
|
/* Write the character to the bit buffer, or pad the bit */
|
|
/* buffer out to a full base64 character */
|
|
if ( bNeedShift )
|
|
{
|
|
nBufferBits += 16;
|
|
nBitBuffer |= static_cast<sal_uInt32>(c) << (32-nBufferBits);
|
|
}
|
|
else
|
|
nBufferBits += (6-(nBufferBits%6))%6;
|
|
|
|
/* Flush out as many full base64 characters as possible */
|
|
while ( (pDestBuf < pEndDestBuf) && (nBufferBits >= 6) )
|
|
{
|
|
nBitBufferTemp = nBitBuffer >> (32-6);
|
|
*pDestBuf = aImplBase64Tab[nBitBufferTemp];
|
|
pDestBuf++;
|
|
nBitBuffer <<= 6;
|
|
nBufferBits -= 6;
|
|
}
|
|
|
|
if ( nBufferBits >= 6 )
|
|
{
|
|
*pInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
|
|
break;
|
|
}
|
|
|
|
/* Write SHIFT_OUT_CHAR, when needed */
|
|
if ( !bNeedShift )
|
|
{
|
|
if ( pDestBuf >= pEndDestBuf )
|
|
{
|
|
*pInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
|
|
break;
|
|
}
|
|
*pDestBuf = IMPL_SHIFT_OUT_CHAR;
|
|
pDestBuf++;
|
|
bShifted = false;
|
|
}
|
|
}
|
|
|
|
if ( !bEnd )
|
|
{
|
|
/* Character can be directly encoded */
|
|
if ( !bNeedShift )
|
|
{
|
|
if ( pDestBuf >= pEndDestBuf )
|
|
{
|
|
*pInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
|
|
break;
|
|
}
|
|
*pDestBuf = static_cast< char >(static_cast< unsigned char >(c));
|
|
pDestBuf++;
|
|
}
|
|
|
|
pSrcBuf++;
|
|
}
|
|
}
|
|
while ( !bEnd );
|
|
|
|
if ( pContextData )
|
|
{
|
|
pContextData->mbShifted = bShifted;
|
|
pContextData->mnBitBuffer = nBitBuffer;
|
|
pContextData->mnBufferBits = nBufferBits;
|
|
}
|
|
|
|
*pSrcCvtChars = nSrcChars - (pEndSrcBuf-pSrcBuf);
|
|
return (nDestBytes - (pEndDestBuf-pDestBuf));
|
|
}
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|