2020-01-18 11:38:21 +03:00
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/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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2021-04-22 11:24:48 +03:00
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* SPDX-License-Identifier: BSD-2-Clause
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2020-01-18 11:38:21 +03:00
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*/
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2021-07-01 14:45:59 +03:00
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#include <AK/CharacterTypes.h>
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2020-03-22 12:12:55 +03:00
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#include <AK/FlyString.h>
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2021-05-14 19:48:15 +03:00
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#include <AK/HashTable.h>
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2021-05-14 16:21:50 +03:00
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#include <AK/StringHash.h>
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2020-03-08 14:34:33 +03:00
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#include <AK/StringImpl.h>
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#include <AK/kmalloc.h>
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2018-12-28 05:09:45 +03:00
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2018-10-10 12:53:07 +03:00
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namespace AK {
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2018-12-21 04:10:45 +03:00
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static StringImpl* s_the_empty_stringimpl = nullptr;
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2018-10-22 14:10:08 +03:00
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2018-12-21 04:10:45 +03:00
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StringImpl& StringImpl::the_empty_stringimpl()
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2018-10-10 12:53:07 +03:00
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{
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2019-06-20 14:21:56 +03:00
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if (!s_the_empty_stringimpl) {
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void* slot = kmalloc(sizeof(StringImpl) + sizeof(char));
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s_the_empty_stringimpl = new (slot) StringImpl(ConstructTheEmptyStringImpl);
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}
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2018-12-21 04:10:45 +03:00
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return *s_the_empty_stringimpl;
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2018-10-10 12:53:07 +03:00
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}
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2019-12-09 19:45:40 +03:00
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StringImpl::StringImpl(ConstructWithInlineBufferTag, size_t length)
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2018-12-28 05:09:45 +03:00
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: m_length(length)
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{
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}
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2018-10-10 12:53:07 +03:00
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StringImpl::~StringImpl()
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{
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2020-03-22 12:12:55 +03:00
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if (m_fly)
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FlyString::did_destroy_impl({}, *this);
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2018-10-10 12:53:07 +03:00
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}
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2019-12-09 19:45:40 +03:00
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NonnullRefPtr<StringImpl> StringImpl::create_uninitialized(size_t length, char*& buffer)
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2018-10-10 12:53:07 +03:00
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{
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2021-02-23 22:42:32 +03:00
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VERIFY(length);
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2019-01-31 19:31:23 +03:00
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void* slot = kmalloc(allocation_size_for_stringimpl(length));
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2021-02-23 22:42:32 +03:00
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VERIFY(slot);
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2021-04-23 17:46:57 +03:00
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auto new_stringimpl = adopt_ref(*new (slot) StringImpl(ConstructWithInlineBuffer, length));
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2019-06-20 14:21:56 +03:00
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buffer = const_cast<char*>(new_stringimpl->characters());
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2018-10-10 12:53:07 +03:00
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buffer[length] = '\0';
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2019-01-31 19:31:23 +03:00
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return new_stringimpl;
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2018-10-10 12:53:07 +03:00
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}
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2022-04-01 20:58:27 +03:00
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RefPtr<StringImpl> StringImpl::create(char const* cstring, size_t length, ShouldChomp should_chomp)
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2018-10-10 12:53:07 +03:00
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{
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if (!cstring)
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return nullptr;
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2019-04-07 21:19:16 +03:00
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if (should_chomp) {
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while (length) {
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char last_ch = cstring[length - 1];
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if (!last_ch || last_ch == '\n' || last_ch == '\r')
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--length;
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else
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break;
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}
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}
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2019-02-03 18:11:28 +03:00
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if (!length)
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return the_empty_stringimpl();
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2018-10-10 12:53:07 +03:00
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char* buffer;
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2019-01-31 19:31:23 +03:00
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auto new_stringimpl = create_uninitialized(length, buffer);
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2018-10-10 12:53:07 +03:00
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memcpy(buffer, cstring, length * sizeof(char));
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2019-01-31 19:31:23 +03:00
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return new_stringimpl;
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2018-10-10 12:53:07 +03:00
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}
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2022-04-01 20:58:27 +03:00
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RefPtr<StringImpl> StringImpl::create(char const* cstring, ShouldChomp shouldChomp)
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2018-10-10 12:53:07 +03:00
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{
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if (!cstring)
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return nullptr;
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2021-10-25 14:16:59 +03:00
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if (!*cstring)
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return the_empty_stringimpl();
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2018-11-07 02:19:35 +03:00
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return create(cstring, strlen(cstring), shouldChomp);
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2018-10-10 12:53:07 +03:00
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}
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2020-08-05 11:37:34 +03:00
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RefPtr<StringImpl> StringImpl::create(ReadonlyBytes bytes, ShouldChomp shouldChomp)
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{
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2022-04-01 20:58:27 +03:00
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return StringImpl::create(reinterpret_cast<char const*>(bytes.data()), bytes.size(), shouldChomp);
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2020-08-05 11:37:34 +03:00
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}
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2021-07-01 14:45:59 +03:00
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RefPtr<StringImpl> StringImpl::create_lowercased(char const* cstring, size_t length)
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2018-10-10 12:53:07 +03:00
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{
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2021-07-01 14:45:59 +03:00
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if (!cstring)
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return nullptr;
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if (!length)
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return the_empty_stringimpl();
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char* buffer;
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auto impl = create_uninitialized(length, buffer);
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for (size_t i = 0; i < length; ++i)
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buffer[i] = (char)to_ascii_lowercase(cstring[i]);
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return impl;
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2018-10-10 12:53:07 +03:00
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}
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2021-07-01 14:45:59 +03:00
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RefPtr<StringImpl> StringImpl::create_uppercased(char const* cstring, size_t length)
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2018-10-10 12:53:07 +03:00
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{
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2021-07-01 14:45:59 +03:00
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if (!cstring)
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return nullptr;
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if (!length)
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return the_empty_stringimpl();
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char* buffer;
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auto impl = create_uninitialized(length, buffer);
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for (size_t i = 0; i < length; ++i)
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buffer[i] = (char)to_ascii_uppercase(cstring[i]);
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return impl;
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2018-10-10 12:53:07 +03:00
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}
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2019-06-21 19:37:47 +03:00
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NonnullRefPtr<StringImpl> StringImpl::to_lowercase() const
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2018-10-10 12:53:07 +03:00
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{
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2019-12-09 19:45:40 +03:00
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for (size_t i = 0; i < m_length; ++i) {
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2021-07-01 14:45:59 +03:00
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if (is_ascii_upper_alpha(characters()[i]))
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return create_lowercased(characters(), m_length).release_nonnull();
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2018-10-10 12:53:07 +03:00
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}
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2019-02-25 18:04:08 +03:00
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return const_cast<StringImpl&>(*this);
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2018-10-10 12:53:07 +03:00
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}
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2019-06-21 19:37:47 +03:00
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NonnullRefPtr<StringImpl> StringImpl::to_uppercase() const
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2018-10-10 12:53:07 +03:00
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{
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2019-12-09 19:45:40 +03:00
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for (size_t i = 0; i < m_length; ++i) {
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2021-07-01 14:45:59 +03:00
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if (is_ascii_lower_alpha(characters()[i]))
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return create_uppercased(characters(), m_length).release_nonnull();
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2018-10-10 12:53:07 +03:00
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}
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2019-02-25 18:04:08 +03:00
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return const_cast<StringImpl&>(*this);
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2018-10-10 12:53:07 +03:00
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}
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2022-02-19 00:56:53 +03:00
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unsigned StringImpl::case_insensitive_hash() const
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{
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return case_insensitive_string_hash(characters(), length());
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}
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2018-12-21 04:10:45 +03:00
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void StringImpl::compute_hash() const
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2018-10-10 12:53:07 +03:00
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{
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2019-03-12 02:56:33 +03:00
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if (!length())
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2018-10-10 12:53:07 +03:00
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m_hash = 0;
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2019-03-12 02:56:33 +03:00
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else
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2019-06-20 14:21:56 +03:00
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m_hash = string_hash(characters(), m_length);
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m_has_hash = true;
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2018-10-10 12:53:07 +03:00
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}
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}
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