forked from OSchip/llvm-project
76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
//===- Strings.h ------------------------------------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Linker
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLD_ELF_STRINGS_H
|
|
#define LLD_ELF_STRINGS_H
|
|
|
|
#include "lld/Common/LLVM.h"
|
|
#include "llvm/ADT/ArrayRef.h"
|
|
#include "llvm/ADT/BitVector.h"
|
|
#include "llvm/ADT/Optional.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/Support/GlobPattern.h"
|
|
#include <vector>
|
|
|
|
namespace lld {
|
|
namespace elf {
|
|
|
|
std::vector<uint8_t> parseHex(StringRef S);
|
|
bool isValidCIdentifier(StringRef S);
|
|
|
|
// This is a lazy version of StringRef. String size is computed lazily
|
|
// when it is needed. It is more efficient than StringRef to instantiate
|
|
// if you have a string whose size is unknown.
|
|
//
|
|
// ELF string tables contain a lot of null-terminated strings.
|
|
// Most of them are not necessary for the linker because they are names
|
|
// of local symbols and the linker doesn't use local symbol names for
|
|
// name resolution. So, we use this class to represents strings read
|
|
// from string tables.
|
|
class StringRefZ {
|
|
public:
|
|
StringRefZ() : Start(nullptr), Size(0) {}
|
|
StringRefZ(const char *S, size_t Size) : Start(S), Size(Size) {}
|
|
|
|
/*implicit*/ StringRefZ(const char *S) : Start(S), Size(-1) {}
|
|
|
|
/*implicit*/ StringRefZ(llvm::StringRef S)
|
|
: Start(S.data()), Size(S.size()) {}
|
|
|
|
operator llvm::StringRef() const {
|
|
if (Size == (size_t)-1)
|
|
Size = strlen(Start);
|
|
return {Start, Size};
|
|
}
|
|
|
|
private:
|
|
const char *Start;
|
|
mutable size_t Size;
|
|
};
|
|
|
|
// This class represents multiple glob patterns.
|
|
class StringMatcher {
|
|
public:
|
|
StringMatcher() = default;
|
|
explicit StringMatcher(ArrayRef<StringRef> Pat);
|
|
|
|
bool match(StringRef S) const;
|
|
|
|
private:
|
|
std::vector<llvm::GlobPattern> Patterns;
|
|
};
|
|
|
|
inline ArrayRef<uint8_t> toArrayRef(StringRef S) {
|
|
return {(const uint8_t *)S.data(), S.size()};
|
|
}
|
|
} // namespace elf
|
|
} // namespace lld
|
|
|
|
#endif
|