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8b33204f37
* third_party: Add libcxxabi Added libcxxabi from LLVM 17.0.6 The library implements the Itanium C++ exception handling ABI. * third_party/libcxxabi: Enable __cxa_thread_atexit Enable `__cxa_thread_atexit` from libcxxabi. `__cxa_thread_atexit_impl` is still implemented by the cosmo libc. The original `__cxa_thread_atexit` has been removed. * third_party/libcxx: Build with exceptions Build libcxx with exceptions enabled. - Removed `_LIBCPP_NO_EXCEPTIONS` from `__config`. - Switched the exception implementation to `libcxxabi`. These two files are taken from the same `libcxx` version as mentioned in `README.cosmo`. - Removed `new_handler_fallback` in favor of `libcxxabi` implementation. - Enable `-fexceptions` and `-frtti` for `libcxx`. - Removed `THIRD_PARTY_LIBCXX` dependency from `libcxxabi` and `libunwind`. These libraries do not use any runtime `libcxx` functions, just headers. * libc: Remove remaining redundant cxa functions - `__cxa_pure_virtual` in `libcxxabi` is also a stub similar to the existing one. - `__cxa_guard_*` from `libcxxabi` is used instead of the ones from Android. Now there should be no more duplicate implementations. `__cxa_thread_atexit_impl`, `__cxa_atexit`, and related supporting functions, are still left to other libraries as in `libcxxabi`. `libcxxabi` is also now added to `cosmopolitan.a` to make up for the removed functions. Affected in-tree libraries (`third_party/double-conversion`) have been updated.
38 lines
1.2 KiB
C++
38 lines
1.2 KiB
C++
//===--- StringViewExtras.h -------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// There are two copies of this file in the source tree. The one under
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// libcxxabi is the original and the one under llvm is the copy. Use
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// cp-to-llvm.sh to update the copy. See README.txt for more details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef DEMANGLE_STRINGVIEW_H
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#define DEMANGLE_STRINGVIEW_H
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#include "third_party/libcxxabi/demangle/DemangleConfig.h"
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#include "third_party/libcxx/string_view"
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DEMANGLE_NAMESPACE_BEGIN
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inline bool starts_with(std::string_view self, char C) noexcept {
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return !self.empty() && *self.begin() == C;
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}
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inline bool starts_with(std::string_view haystack,
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std::string_view needle) noexcept {
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if (needle.size() > haystack.size())
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return false;
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haystack.remove_suffix(haystack.size() - needle.size());
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return haystack == needle;
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}
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DEMANGLE_NAMESPACE_END
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#endif
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