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-rw-r--r--sal/textenc/convertsinglebytetobmpunicode.cxx209
1 files changed, 209 insertions, 0 deletions
diff --git a/sal/textenc/convertsinglebytetobmpunicode.cxx b/sal/textenc/convertsinglebytetobmpunicode.cxx
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+++ b/sal/textenc/convertsinglebytetobmpunicode.cxx
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+/* -*- 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"
+
+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;
+ 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 (rtl::isHighSurrogate(c)) {
+ highSurrogate = static_cast< sal_Unicode >(c);
+ continue;
+ }
+ else if (rtl::isLowSurrogate(c))
+ {
+ undefined = false;
+ goto bad_input;
+ }
+ } else if (rtl::isLowSurrogate(c)) {
+ c = rtl::combineSurrogates(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: */