mirror of
https://github.com/LadybirdBrowser/ladybird.git
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286 lines
7.9 KiB
C++
286 lines
7.9 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/AnyOf.h>
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#include <AK/ByteBuffer.h>
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#include <AK/Find.h>
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#include <AK/FlyString.h>
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#include <AK/Memory.h>
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#include <AK/String.h>
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#include <AK/StringView.h>
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namespace AK {
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StringView::StringView(const String& string)
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: m_characters(string.characters())
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, m_length(string.length())
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{
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}
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StringView::StringView(const FlyString& string)
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: m_characters(string.characters())
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, m_length(string.length())
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{
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}
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StringView::StringView(const ByteBuffer& buffer)
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: m_characters((const char*)buffer.data())
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, m_length(buffer.size())
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{
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}
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Vector<StringView> StringView::split_view(const char separator, bool keep_empty) const
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{
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if (is_empty())
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return {};
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Vector<StringView> v;
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size_t substart = 0;
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for (size_t i = 0; i < length(); ++i) {
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char ch = characters_without_null_termination()[i];
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if (ch == separator) {
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size_t sublen = i - substart;
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if (sublen != 0 || keep_empty)
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v.append(substring_view(substart, sublen));
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substart = i + 1;
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}
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}
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size_t taillen = length() - substart;
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if (taillen != 0 || keep_empty)
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v.append(substring_view(substart, taillen));
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return v;
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}
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Vector<StringView> StringView::split_view(const StringView& separator, bool keep_empty) const
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{
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VERIFY(!separator.is_empty());
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if (is_empty())
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return {};
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StringView view { *this };
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Vector<StringView> parts;
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auto maybe_separator_index = find(separator);
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while (maybe_separator_index.has_value()) {
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auto separator_index = maybe_separator_index.value();
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auto part_with_separator = view.substring_view(0, separator_index + separator.length());
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if (keep_empty || separator_index > 0)
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parts.append(part_with_separator.substring_view(0, separator_index));
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view = view.substring_view_starting_after_substring(part_with_separator);
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maybe_separator_index = view.find(separator);
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}
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if (keep_empty || !view.is_empty())
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parts.append(view);
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return parts;
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}
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Vector<StringView> StringView::lines(bool consider_cr) const
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{
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if (is_empty())
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return {};
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if (!consider_cr)
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return split_view('\n', true);
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Vector<StringView> v;
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size_t substart = 0;
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bool last_ch_was_cr = false;
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bool split_view = false;
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for (size_t i = 0; i < length(); ++i) {
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char ch = characters_without_null_termination()[i];
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if (ch == '\n') {
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split_view = true;
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if (last_ch_was_cr) {
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substart = i + 1;
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split_view = false;
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last_ch_was_cr = false;
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}
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}
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if (ch == '\r') {
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split_view = true;
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last_ch_was_cr = true;
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}
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if (split_view) {
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size_t sublen = i - substart;
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v.append(substring_view(substart, sublen));
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substart = i + 1;
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}
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split_view = false;
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}
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size_t taillen = length() - substart;
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if (taillen != 0)
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v.append(substring_view(substart, taillen));
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return v;
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}
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bool StringView::starts_with(char ch) const
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{
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if (is_empty())
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return false;
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return ch == characters_without_null_termination()[0];
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}
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bool StringView::starts_with(const StringView& str, CaseSensitivity case_sensitivity) const
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{
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return StringUtils::starts_with(*this, str, case_sensitivity);
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}
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bool StringView::ends_with(char ch) const
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{
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if (is_empty())
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return false;
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return ch == characters_without_null_termination()[length() - 1];
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}
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bool StringView::ends_with(const StringView& str, CaseSensitivity case_sensitivity) const
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{
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return StringUtils::ends_with(*this, str, case_sensitivity);
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}
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bool StringView::matches(const StringView& mask, Vector<MaskSpan>& mask_spans, CaseSensitivity case_sensitivity) const
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{
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return StringUtils::matches(*this, mask, case_sensitivity, &mask_spans);
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}
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bool StringView::matches(const StringView& mask, CaseSensitivity case_sensitivity) const
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{
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return StringUtils::matches(*this, mask, case_sensitivity);
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}
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bool StringView::contains(char needle) const
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{
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for (char current : *this) {
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if (current == needle)
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return true;
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}
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return false;
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}
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bool StringView::contains(const StringView& needle, CaseSensitivity case_sensitivity) const
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{
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return StringUtils::contains(*this, needle, case_sensitivity);
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}
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bool StringView::equals_ignoring_case(const StringView& other) const
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{
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return StringUtils::equals_ignoring_case(*this, other);
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}
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StringView StringView::substring_view_starting_from_substring(const StringView& substring) const
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{
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const char* remaining_characters = substring.characters_without_null_termination();
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VERIFY(remaining_characters >= m_characters);
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VERIFY(remaining_characters <= m_characters + m_length);
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size_t remaining_length = m_length - (remaining_characters - m_characters);
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return { remaining_characters, remaining_length };
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}
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StringView StringView::substring_view_starting_after_substring(const StringView& substring) const
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{
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const char* remaining_characters = substring.characters_without_null_termination() + substring.length();
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VERIFY(remaining_characters >= m_characters);
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VERIFY(remaining_characters <= m_characters + m_length);
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size_t remaining_length = m_length - (remaining_characters - m_characters);
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return { remaining_characters, remaining_length };
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}
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template<typename T>
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Optional<T> StringView::to_int() const
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{
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return StringUtils::convert_to_int<T>(*this);
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}
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template Optional<i8> StringView::to_int() const;
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template Optional<i16> StringView::to_int() const;
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template Optional<i32> StringView::to_int() const;
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template Optional<i64> StringView::to_int() const;
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template<typename T>
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Optional<T> StringView::to_uint() const
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{
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return StringUtils::convert_to_uint<T>(*this);
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}
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template Optional<u8> StringView::to_uint() const;
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template Optional<u16> StringView::to_uint() const;
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template Optional<u32> StringView::to_uint() const;
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template Optional<u64> StringView::to_uint() const;
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template Optional<long> StringView::to_uint() const;
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template Optional<long long> StringView::to_uint() const;
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bool StringView::operator==(const String& string) const
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{
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if (string.is_null())
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return !m_characters;
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if (!m_characters)
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return false;
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if (m_length != string.length())
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return false;
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if (m_characters == string.characters())
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return true;
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return !__builtin_memcmp(m_characters, string.characters(), m_length);
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}
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Optional<size_t> StringView::find_first_of(char c) const
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{
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if (const auto location = AK::find(begin(), end(), c); location != end()) {
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return location.index();
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}
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return {};
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}
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Optional<size_t> StringView::find_first_of(const StringView& view) const
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{
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if (const auto location = AK::find_if(begin(), end(),
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[&](const auto c) {
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return any_of(view.begin(), view.end(),
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[&](const auto view_char) {
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return c == view_char;
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});
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});
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location != end()) {
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return location.index();
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}
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return {};
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}
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Optional<size_t> StringView::find_last_of(char c) const
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{
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for (size_t pos = m_length; pos != 0; --pos) {
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if (m_characters[pos - 1] == c)
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return pos - 1;
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}
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return {};
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}
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Optional<size_t> StringView::find_last_of(const StringView& view) const
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{
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for (size_t pos = m_length; pos != 0; --pos) {
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char c = m_characters[pos - 1];
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for (char view_char : view) {
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if (c == view_char)
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return pos - 1;
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}
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}
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return {};
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}
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Optional<size_t> StringView::find(char c) const
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{
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return find(StringView { &c, 1 });
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}
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Optional<size_t> StringView::find(const StringView& view) const
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{
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return StringUtils::find(*this, view);
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}
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String StringView::to_string() const { return String { *this }; }
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}
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