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dfbc6e3742
Let's use shared_ptr since manual ref counting can be a bug-prone and using the global mutex inside destructor is not useful for some time. To remove raw pointer manipulation, needed to change Layout constructors. Layout is no longer copyable and need to pass FontCollection to constructor. Bug: 28119474 Test: minikin_tests passed Test: hwui_unit_tests passed Test: No performance regression in minikin_perftest. Change-Id: I8824593206ecba74cbc9731e298f045e1ae442a3
120 lines
4.1 KiB
C++
120 lines
4.1 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <unicode/utf.h>
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#include <unicode/utf8.h>
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#include <cstdlib>
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#include <cutils/log.h>
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#include <vector>
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#include <string>
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namespace minikin {
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// src is of the form "U+1F431 | 'h' 'i'". Position of "|" gets saved to offset if non-null.
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// Size is returned in an out parameter because gtest needs a void return for ASSERT to work.
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void ParseUnicode(uint16_t* buf, size_t buf_size, const char* src, size_t* result_size,
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size_t* offset) {
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size_t input_ix = 0;
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size_t output_ix = 0;
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bool seen_offset = false;
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while (src[input_ix] != 0) {
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switch (src[input_ix]) {
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case '\'':
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// single ASCII char
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LOG_ALWAYS_FATAL_IF(static_cast<uint8_t>(src[input_ix]) >= 0x80);
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input_ix++;
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LOG_ALWAYS_FATAL_IF(src[input_ix] == 0);
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LOG_ALWAYS_FATAL_IF(output_ix >= buf_size);
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buf[output_ix++] = (uint16_t)src[input_ix++];
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LOG_ALWAYS_FATAL_IF(src[input_ix] != '\'');
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input_ix++;
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break;
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case 'u':
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case 'U': {
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// Unicode codepoint in hex syntax
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input_ix++;
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LOG_ALWAYS_FATAL_IF(src[input_ix] != '+');
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input_ix++;
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char* endptr = (char*)src + input_ix;
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unsigned long int codepoint = strtoul(src + input_ix, &endptr, 16);
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size_t num_hex_digits = endptr - (src + input_ix);
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// also triggers on invalid number syntax, digits = 0
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LOG_ALWAYS_FATAL_IF(num_hex_digits < 4u);
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LOG_ALWAYS_FATAL_IF(num_hex_digits > 6u);
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LOG_ALWAYS_FATAL_IF(codepoint > 0x10FFFFu);
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input_ix += num_hex_digits;
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if (U16_LENGTH(codepoint) == 1) {
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LOG_ALWAYS_FATAL_IF(output_ix + 1 > buf_size);
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buf[output_ix++] = codepoint;
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} else {
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// UTF-16 encoding
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LOG_ALWAYS_FATAL_IF(output_ix + 2 > buf_size);
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buf[output_ix++] = U16_LEAD(codepoint);
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buf[output_ix++] = U16_TRAIL(codepoint);
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}
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break;
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}
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case ' ':
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input_ix++;
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break;
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case '|':
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LOG_ALWAYS_FATAL_IF(seen_offset);
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LOG_ALWAYS_FATAL_IF(offset == nullptr);
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*offset = output_ix;
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seen_offset = true;
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input_ix++;
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break;
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default:
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LOG_ALWAYS_FATAL("Unexpected Character");
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}
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}
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LOG_ALWAYS_FATAL_IF(result_size == nullptr);
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*result_size = output_ix;
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LOG_ALWAYS_FATAL_IF(!seen_offset && offset != nullptr);
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}
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std::vector<uint16_t> parseUnicodeStringWithOffset(const std::string& in, size_t* offset) {
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std::unique_ptr<uint16_t[]> buffer(new uint16_t[in.size()]);
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size_t result_size = 0;
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ParseUnicode(buffer.get(), in.size(), in.c_str(), &result_size, offset);
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return std::vector<uint16_t>(buffer.get(), buffer.get() + result_size);
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}
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std::vector<uint16_t> parseUnicodeString(const std::string& in) {
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return parseUnicodeStringWithOffset(in, nullptr);
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}
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std::vector<uint16_t> utf8ToUtf16(const std::string& text) {
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std::vector<uint16_t> result;
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int32_t i = 0;
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const int32_t textLength = static_cast<int32_t>(text.size());
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uint32_t c = 0;
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while (i < textLength) {
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U8_NEXT(text.c_str(), i, textLength, c);
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if (U16_LENGTH(c) == 1) {
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result.push_back(c);
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} else {
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result.push_back(U16_LEAD(c));
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result.push_back(U16_TRAIL(c));
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}
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}
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return result;
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}
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} // namespace minikin
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