blob: bcfa28144989db159271eec8739e96b8ac897990 [file] [log] [blame]
//===- 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/Core/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 {
int getPriority(StringRef S);
bool hasWildcard(StringRef S);
std::vector<uint8_t> parseHex(StringRef S);
bool isValidCIdentifier(StringRef S);
StringRef unquote(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;
};
// Returns a demangled C++ symbol name. If Name is not a mangled
// name, it returns Optional::None.
llvm::Optional<std::string> demangle(StringRef Name);
inline StringRef toStringRef(ArrayRef<uint8_t> Arr) {
return {(const char *)Arr.data(), Arr.size()};
}
inline ArrayRef<uint8_t> toArrayRef(StringRef S) {
return {(const uint8_t *)S.data(), S.size()};
}
}
}
#endif