office-gobmx/sal/textenc/tcvtutf7.cxx
Stephan Bergmann 5a3bb76cd3 More loplugin:cstylecast: sal
auto-rewrite with <https://gerrit.libreoffice.org/#/c/47798/> "Enable
loplugin:cstylecast for some more cases" plus
solenv/clang-format/reformat-formatted-files

Change-Id: I7d89b011464ba5d2dd12e04d5fc9f65cb4daebde
2018-01-12 20:17:51 +01:00

574 lines
21 KiB
C++

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