0d9a357373
This commit introduce three new `til` features: * "til/latch.h": A std::latch clone, until we're on C++20. * "til/mutex.h": A safe mutex wrapper, which only allows you access to the protected data after locking it. No more forgetting to lock mutexes! * "til/throttled_func.h": Function invocation throttling used to be available as the `ThrottledFunc` class already. But this class is vastly more efficient and doesn't rely on any WinRT types. This PR also adds a `til::ends_with` string helper which is `til::starts_with` counterpart. ## Validation Steps Performed * Scrollbar throttling still works as it used to ✔️ * No performance regressions when printing big.txt ✔️ Closes #10393
74 lines
2.5 KiB
C++
74 lines
2.5 KiB
C++
// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT license.
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#pragma once
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namespace til // Terminal Implementation Library. Also: "Today I Learned"
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{
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_TIL_INLINEPREFIX std::wstring visualize_control_codes(std::wstring str) noexcept
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{
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for (auto& ch : str)
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{
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if (ch < 0x20)
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{
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ch += 0x2400;
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}
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else if (ch == 0x20)
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{
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ch = 0x2423; // replace space with ␣
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}
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else if (ch == 0x7f)
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{
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ch = 0x2421; // replace del with ␡
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}
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}
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return str;
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}
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_TIL_INLINEPREFIX std::wstring visualize_control_codes(std::wstring_view str)
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{
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return visualize_control_codes(std::wstring{ str });
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}
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template<typename T, typename Traits>
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constexpr bool starts_with(const std::basic_string_view<T, Traits> str, const std::basic_string_view<T, Traits> prefix) noexcept
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{
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#ifdef __cpp_lib_starts_ends_with
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#error This code can be replaced in C++20, which natively supports .starts_with().
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#endif
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return str.size() >= prefix.size() && Traits::compare(str.data(), prefix.data(), prefix.size()) == 0;
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};
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constexpr bool starts_with(const std::string_view str, const std::string_view prefix) noexcept
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{
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return starts_with<>(str, prefix);
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};
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constexpr bool starts_with(const std::wstring_view str, const std::wstring_view prefix) noexcept
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{
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return starts_with<>(str, prefix);
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};
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template<typename T, typename Traits>
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constexpr bool ends_with(const std::basic_string_view<T, Traits> str, const std::basic_string_view<T, Traits> prefix) noexcept
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{
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#ifdef __cpp_lib_ends_ends_with
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#error This code can be replaced in C++20, which natively supports .ends_with().
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#endif
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#pragma warning(push)
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#pragma warning(disable : 26481) // Don't use pointer arithmetic. Use span instead (bounds.1).
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return str.size() >= prefix.size() && Traits::compare(str.data() + (str.size() - prefix.size()), prefix.data(), prefix.size()) == 0;
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#pragma warning(pop)
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};
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constexpr bool ends_with(const std::string_view str, const std::string_view prefix) noexcept
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{
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return ends_with<>(str, prefix);
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};
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constexpr bool ends_with(const std::wstring_view str, const std::wstring_view prefix) noexcept
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{
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return ends_with<>(str, prefix);
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};
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}
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