mirror of
https://github.com/SerenityOS/serenity
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65b420f996
These instances were detected by searching for files that include AK/Memory.h, but don't match the regex: \\b(fast_u32_copy|fast_u32_fill|secure_zero|timing_safe_compare)\\b This regex is pessimistic, so there might be more files that don't actually use any memory function. In theory, one might use LibCPP to detect things like this automatically, but let's do this one step after another.
296 lines
8.4 KiB
C++
296 lines
8.4 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/Function.h>
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#include <AK/StringBuilder.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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#ifndef KERNEL
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# include <AK/DeprecatedString.h>
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# include <AK/FlyString.h>
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# include <AK/String.h>
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#endif
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namespace AK {
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#ifndef KERNEL
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StringView::StringView(String const& string)
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: m_characters(reinterpret_cast<char const*>(string.bytes().data()))
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, m_length(string.bytes().size())
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{
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}
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StringView::StringView(DeprecatedString const& 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(FlyString const& 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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#endif
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StringView::StringView(ByteBuffer const& buffer)
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: m_characters((char const*)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(char const separator, SplitBehavior split_behavior) const
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{
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StringView seperator_view { &separator, 1 };
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return split_view(seperator_view, split_behavior);
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}
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Vector<StringView> StringView::split_view(StringView separator, SplitBehavior split_behavior) const
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{
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Vector<StringView> parts;
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for_each_split_view(separator, split_behavior, [&](StringView view) {
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parts.append(view);
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});
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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', SplitBehavior::KeepEmpty);
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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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}
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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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} else {
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last_ch_was_cr = false;
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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(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(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(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(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(u32 needle) const
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{
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// A code point should be at most four UTF-8 bytes, which easily fits into StringBuilder's inline-buffer.
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// Therefore, this will not allocate.
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StringBuilder needle_builder;
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auto result = needle_builder.try_append_code_point(needle);
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if (result.is_error()) {
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// The needle is invalid, therefore the string does not contain it.
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return false;
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}
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return contains(needle_builder.string_view());
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}
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bool StringView::contains(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(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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#ifndef KERNEL
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DeprecatedString StringView::to_lowercase_string() const
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{
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return StringImpl::create_lowercased(characters_without_null_termination(), length());
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}
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DeprecatedString StringView::to_uppercase_string() const
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{
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return StringImpl::create_uppercased(characters_without_null_termination(), length());
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}
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DeprecatedString StringView::to_titlecase_string() const
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{
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return StringUtils::to_titlecase(*this);
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}
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#endif
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StringView StringView::substring_view_starting_from_substring(StringView substring) const
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{
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char const* 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(StringView substring) const
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{
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char const* 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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bool StringView::copy_characters_to_buffer(char* buffer, size_t buffer_size) const
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{
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// We must fit at least the NUL-terminator.
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VERIFY(buffer_size > 0);
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size_t characters_to_copy = min(m_length, buffer_size - 1);
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__builtin_memcpy(buffer, m_characters, characters_to_copy);
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buffer[characters_to_copy] = 0;
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return characters_to_copy == m_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<long> StringView::to_int() const;
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template Optional<long long> 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<unsigned long> StringView::to_uint() const;
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template Optional<unsigned long long> StringView::to_uint() const;
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#ifndef KERNEL
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Optional<double> StringView::to_double(TrimWhitespace trim_whitespace) const
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{
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return StringUtils::convert_to_floating_point<double>(*this, trim_whitespace);
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}
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Optional<float> StringView::to_float(TrimWhitespace trim_whitespace) const
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{
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return StringUtils::convert_to_floating_point<float>(*this, trim_whitespace);
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}
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bool StringView::operator==(DeprecatedString const& string) const
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{
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return *this == string.view();
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}
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DeprecatedString StringView::to_deprecated_string() const { return DeprecatedString { *this }; }
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DeprecatedString StringView::replace(StringView needle, StringView replacement, ReplaceMode replace_mode) const
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{
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return StringUtils::replace(*this, needle, replacement, replace_mode);
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}
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#endif
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Vector<size_t> StringView::find_all(StringView needle) const
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{
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return StringUtils::find_all(*this, needle);
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}
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Vector<StringView> StringView::split_view_if(Function<bool(char)> const& predicate, SplitBehavior split_behavior) 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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bool keep_empty = has_flag(split_behavior, SplitBehavior::KeepEmpty);
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bool keep_separator = has_flag(split_behavior, SplitBehavior::KeepTrailingSeparator);
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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 (predicate(ch)) {
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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, keep_separator ? sublen + 1 : 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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}
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