mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 03:02:36 +01:00
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
//===-- NonRelocatableStringpool.h - A simple stringpool -----------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
#ifndef LLVM_TOOLS_DSYMUTIL_NONRELOCATABLESTRINGPOOL_H
|
|
#define LLVM_TOOLS_DSYMUTIL_NONRELOCATABLESTRINGPOOL_H
|
|
|
|
namespace llvm {
|
|
namespace dsymutil {
|
|
|
|
/// \brief A string table that doesn't need relocations.
|
|
///
|
|
/// We are doing a final link, no need for a string table that
|
|
/// has relocation entries for every reference to it. This class
|
|
/// provides this ablitity by just associating offsets with
|
|
/// strings.
|
|
class NonRelocatableStringpool {
|
|
public:
|
|
/// \brief Entries are stored into the StringMap and simply linked
|
|
/// together through the second element of this pair in order to
|
|
/// keep track of insertion order.
|
|
typedef StringMap<std::pair<uint32_t, StringMapEntryBase *>, BumpPtrAllocator>
|
|
MapTy;
|
|
|
|
NonRelocatableStringpool()
|
|
: CurrentEndOffset(0), Sentinel(0), Last(&Sentinel) {
|
|
// Legacy dsymutil puts an empty string at the start of the line
|
|
// table.
|
|
getStringOffset("");
|
|
}
|
|
|
|
/// \brief Get the offset of string \p S in the string table. This
|
|
/// can insert a new element or return the offset of a preexisitng
|
|
/// one.
|
|
uint32_t getStringOffset(StringRef S);
|
|
|
|
/// \brief Get permanent storage for \p S (but do not necessarily
|
|
/// emit \p S in the output section).
|
|
/// \returns The StringRef that points to permanent storage to use
|
|
/// in place of \p S.
|
|
StringRef internString(StringRef S);
|
|
|
|
// \brief Return the first entry of the string table.
|
|
const MapTy::MapEntryTy *getFirstEntry() const {
|
|
return getNextEntry(&Sentinel);
|
|
}
|
|
|
|
// \brief Get the entry following \p E in the string table or null
|
|
// if \p E was the last entry.
|
|
const MapTy::MapEntryTy *getNextEntry(const MapTy::MapEntryTy *E) const {
|
|
return static_cast<const MapTy::MapEntryTy *>(E->getValue().second);
|
|
}
|
|
|
|
uint64_t getSize() { return CurrentEndOffset; }
|
|
|
|
private:
|
|
MapTy Strings;
|
|
uint32_t CurrentEndOffset;
|
|
MapTy::MapEntryTy Sentinel, *Last;
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|