forked from OSchip/llvm-project
80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
//===- Strings.h ------------------------------------------------*- C++ -*-===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_ELF_STRINGS_H
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#define LLD_ELF_STRINGS_H
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#include "lld/Common/LLVM.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/BitVector.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/GlobPattern.h"
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#include <vector>
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namespace lld {
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namespace elf {
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std::vector<uint8_t> parseHex(StringRef S);
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bool isValidCIdentifier(StringRef S);
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// This is a lazy version of StringRef. String size is computed lazily
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// when it is needed. It is more efficient than StringRef to instantiate
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// if you have a string whose size is unknown.
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//
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// ELF string tables contain a lot of null-terminated strings.
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// Most of them are not necessary for the linker because they are names
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// of local symbols and the linker doesn't use local symbol names for
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// name resolution. So, we use this class to represents strings read
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// from string tables.
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class StringRefZ {
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public:
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StringRefZ() : Start(nullptr), Size(0) {}
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StringRefZ(const char *S, size_t Size) : Start(S), Size(Size) {}
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/*implicit*/ StringRefZ(const char *S) : Start(S), Size(-1) {}
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/*implicit*/ StringRefZ(llvm::StringRef S)
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: Start(S.data()), Size(S.size()) {}
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operator llvm::StringRef() const {
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if (Size == (size_t)-1)
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Size = strlen(Start);
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return {Start, Size};
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}
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private:
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const char *Start;
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mutable size_t Size;
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};
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// This class represents multiple glob patterns.
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class StringMatcher {
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public:
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StringMatcher() = default;
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explicit StringMatcher(ArrayRef<StringRef> Pat);
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bool match(StringRef S) const;
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private:
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std::vector<llvm::GlobPattern> Patterns;
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};
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// Returns a demangled C++ symbol name. If Name is not a mangled
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// name, it returns Optional::None.
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llvm::Optional<std::string> demangle(StringRef Name);
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inline ArrayRef<uint8_t> toArrayRef(StringRef S) {
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return {(const uint8_t *)S.data(), S.size()};
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}
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} // namespace elf
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} // namespace lld
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#endif
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