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210 | /* -*- 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 <cassert>
#include <cstddef>
#include <rtl/character.hxx>
#include <rtl/textcvt.h>
#include <sal/types.h>
#include "context.hxx"
#include "converter.hxx"
#include "convertsinglebytetobmpunicode.hxx"
#include "unichars.hxx"
sal_Size rtl_textenc_convertSingleByteToBmpUnicode(
void const * data, SAL_UNUSED_PARAMETER void *, char const * srcBuf,
sal_Size srcBytes, sal_Unicode * destBuf, sal_Size destChars,
sal_uInt32 flags, sal_uInt32 * info, sal_Size * srcCvtBytes)
{
sal_Unicode const * map = static_cast<
rtl::textenc::BmpUnicodeToSingleByteConverterData const * >(
data)->byteToUnicode;
sal_uInt32 infoFlags = 0;
sal_Size converted = 0;
sal_Unicode * destBufPtr = destBuf;
sal_Unicode * destBufEnd = destBuf + destChars;
for (; converted < srcBytes; ++converted) {
char b = *srcBuf++;
sal_Unicode c = map[static_cast< sal_uInt8 >(b)];
if (c == 0xFFFF) {
goto bad_input;
}
if (destBufEnd - destBufPtr < 1) {
goto no_output;
}
*destBufPtr++ = c;
continue;
bad_input:
switch (sal::detail::textenc::handleBadInputTextToUnicodeConversion(
true/*undefined*/, false, b, flags, &destBufPtr, destBufEnd,
&infoFlags))
{
case sal::detail::textenc::BAD_INPUT_STOP:
if ((flags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0) {
++converted;
}
break;
case sal::detail::textenc::BAD_INPUT_CONTINUE:
continue;
case sal::detail::textenc::BAD_INPUT_NO_OUTPUT:
goto no_output;
}
break;
no_output:
--srcBuf;<--- Variable 'srcBuf' is assigned a value that is never used.
infoFlags |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOOSMALL;
break;
}
if (info != nullptr) {
*info = infoFlags;
}
if (srcCvtBytes != nullptr) {
*srcCvtBytes = converted;
}
return destBufPtr - destBuf;
}
sal_Size rtl_textenc_convertBmpUnicodeToSingleByte(
void const * data, void * context,
sal_Unicode const * srcBuf, sal_Size srcChars, char * destBuf,
sal_Size destBytes, sal_uInt32 flags, sal_uInt32 * info,
sal_Size * srcCvtChars)
{
std::size_t entries = static_cast<
rtl::textenc::BmpUnicodeToSingleByteConverterData const * >(
data)->unicodeToByteEntries;
rtl::textenc::BmpUnicodeToSingleByteRange const * ranges = static_cast<
rtl::textenc::BmpUnicodeToSingleByteConverterData const * >(
data)->unicodeToByte;
sal_Unicode highSurrogate = 0;
sal_uInt32 infoFlags = 0;
sal_Size converted = 0;
char * destBufPtr = destBuf;
char * destBufEnd = destBuf + destBytes;
if (context != nullptr) {
highSurrogate = static_cast< ImplUnicodeToTextContext * >(context)->
m_nHighSurrogate;
}
for (; converted < srcChars; ++converted) {
bool undefined = true;
sal_uInt32 c = *srcBuf++;
if (highSurrogate == 0) {
if (ImplIsHighSurrogate(c)) {
highSurrogate = static_cast< sal_Unicode >(c);
continue;
}
else if (ImplIsLowSurrogate(c))
{
undefined = false;
goto bad_input;
}
} else if (ImplIsLowSurrogate(c)) {
c = ImplCombineSurrogates(highSurrogate, c);
} else {
undefined = false;
goto bad_input;
}
assert(rtl::isUnicodeScalarValue(c));
// Linearly searching through the ranges if probably fastest, assuming
// that most converted characters belong to the ASCII subset:
for (std::size_t i = 0; i < entries; ++i) {
if (c < ranges[i].unicode) {
break;
}
if (c <= sal::static_int_cast< sal_uInt32 >(
ranges[i].unicode + ranges[i].range))
{
if (destBufEnd - destBufPtr < 1) {
goto no_output;
}
*destBufPtr++ = static_cast< char >(
ranges[i].byte + (c - ranges[i].unicode));
goto done;
}
}
goto bad_input;
done:
highSurrogate = 0;
continue;
bad_input:
switch (sal::detail::textenc::handleBadInputUnicodeToTextConversion(
undefined, c, flags, &destBufPtr, destBufEnd, &infoFlags, nullptr,
0, nullptr))
{
case sal::detail::textenc::BAD_INPUT_STOP:
highSurrogate = 0;
break;
case sal::detail::textenc::BAD_INPUT_CONTINUE:
highSurrogate = 0;
continue;
case sal::detail::textenc::BAD_INPUT_NO_OUTPUT:
goto no_output;
}
break;
no_output:
--srcBuf;
infoFlags |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
break;
}
if (highSurrogate != 0
&& ((infoFlags
& (RTL_UNICODETOTEXT_INFO_ERROR
| RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL))
== 0))
{
if ((flags & RTL_UNICODETOTEXT_FLAGS_FLUSH) != 0) {
infoFlags |= RTL_UNICODETOTEXT_INFO_SRCBUFFERTOSMALL;
} else {
switch (sal::detail::textenc::handleBadInputUnicodeToTextConversion(
false, 0, flags, &destBufPtr, destBufEnd, &infoFlags, nullptr,
0, nullptr))
{
case sal::detail::textenc::BAD_INPUT_STOP:
case sal::detail::textenc::BAD_INPUT_CONTINUE:
highSurrogate = 0;
break;
case sal::detail::textenc::BAD_INPUT_NO_OUTPUT:
infoFlags |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL;
break;
}
}
}
if (context != nullptr) {
static_cast< ImplUnicodeToTextContext * >(context)->m_nHighSurrogate
= highSurrogate;
}
if (info != nullptr) {
*info = infoFlags;
}
if (srcCvtChars != nullptr) {
*srcCvtChars = converted;
}
return destBufPtr - destBuf;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|