#ifndef LLVM_ADT_STRINGMAP_H
#define LLVM_ADT_STRINGMAP_H
+#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Allocator.h"
#include <cstring>
#include <string>
/// specified bucket will be non-null. Otherwise, it will be null. In either
/// case, the FullHashValue field of the bucket will be set to the hash value
/// of the string.
- unsigned LookupBucketFor(const char *KeyStart, const char *KeyEnd);
+ unsigned LookupBucketFor(StringRef Key);
/// FindKey - Look up the bucket that contains the specified key. If it exists
/// in the map, return the bucket number of the key. Otherwise return -1.
/// This does not modify the map.
- int FindKey(const char *KeyStart, const char *KeyEnd) const;
+ int FindKey(StringRef Key) const;
/// RemoveKey - Remove the specified StringMapEntry from the table, but do not
/// delete it. This aborts if the value isn't in the table.
/// RemoveKey - Remove the StringMapEntry for the specified key from the
/// table, returning it. If the key is not in the table, this returns null.
- StringMapEntryBase *RemoveKey(const char *KeyStart, const char *KeyEnd);
+ StringMapEntryBase *RemoveKey(StringRef Key);
private:
void init(unsigned Size);
public:
StringMapEntry(unsigned strLen, const ValueTy &V)
: StringMapEntryBase(strLen), second(V) {}
+ StringRef getKey() const {
+ return StringRef(getKeyData(), getKeyLength());
+ }
+
const ValueTy &getValue() const { return second; }
ValueTy &getValue() { return second; }
return GetStringMapEntryFromValue(const_cast<ValueTy&>(V));
}
+ /// GetStringMapEntryFromKeyData - Given key data that is known to be embedded
+ /// into a StringMapEntry, return the StringMapEntry itself.
+ static StringMapEntry &GetStringMapEntryFromKeyData(const char *KeyData) {
+ char *Ptr = const_cast<char*>(KeyData) - sizeof(StringMapEntry<ValueTy>);
+ return *reinterpret_cast<StringMapEntry*>(Ptr);
+ }
+
+
/// Destroy - Destroy this StringMapEntry, releasing memory back to the
/// specified allocator.
template<typename AllocatorTy>
};
+template <typename T> struct ReferenceAdder { typedef T& result; };
+template <typename T> struct ReferenceAdder<T&> { typedef T result; };
+
/// StringMap - This is an unconventional map that is specialized for handling
/// keys that are "strings", which are basically ranges of bytes. This does some
/// funky memory allocation and hashing things to make it extremely efficient,
StringMap() : StringMapImpl(static_cast<unsigned>(sizeof(MapEntryTy))) {}
explicit StringMap(unsigned InitialSize)
: StringMapImpl(InitialSize, static_cast<unsigned>(sizeof(MapEntryTy))) {}
+
+ explicit StringMap(AllocatorTy A)
+ : StringMapImpl(static_cast<unsigned>(sizeof(MapEntryTy))), Allocator(A) {}
+
explicit StringMap(const StringMap &RHS)
: StringMapImpl(static_cast<unsigned>(sizeof(MapEntryTy))) {
assert(RHS.empty() &&
clear();
}
-
- AllocatorTy &getAllocator() { return Allocator; }
- const AllocatorTy &getAllocator() const { return Allocator; }
+ typedef typename ReferenceAdder<AllocatorTy>::result AllocatorRefTy;
+ typedef typename ReferenceAdder<const AllocatorTy>::result AllocatorCRefTy;
+ AllocatorRefTy getAllocator() { return Allocator; }
+ AllocatorCRefTy getAllocator() const { return Allocator; }
typedef const char* key_type;
typedef ValueTy mapped_type;
return const_iterator(TheTable+NumBuckets, true);
}
- iterator find(const char *KeyStart, const char *KeyEnd) {
- int Bucket = FindKey(KeyStart, KeyEnd);
+ iterator find(StringRef Key) {
+ int Bucket = FindKey(Key);
if (Bucket == -1) return end();
return iterator(TheTable+Bucket);
}
- iterator find(const char *Key) {
- return find(Key, Key + strlen(Key));
- }
- iterator find(const std::string &Key) {
- const char* key_start = (Key.empty() ? NULL : &Key[0]);
- return find(key_start, key_start + Key.size());
- }
- const_iterator find(const char *KeyStart, const char *KeyEnd) const {
- int Bucket = FindKey(KeyStart, KeyEnd);
+ const_iterator find(StringRef Key) const {
+ int Bucket = FindKey(Key);
if (Bucket == -1) return end();
return const_iterator(TheTable+Bucket);
}
- const_iterator find(const char *Key) const {
- return find(Key, Key + strlen(Key));
- }
- const_iterator find(const std::string &Key) const {
- const char* key_start = (Key.empty() ? NULL : &Key[0]);
- return find(key_start, key_start + Key.size());
- }
/// lookup - Return the entry for the specified key, or a default
/// constructed value if no such entry exists.
- ValueTy lookup(const char *KeyStart, const char *KeyEnd) const {
- const_iterator it = find(KeyStart, KeyEnd);
- if (it != end())
- return it->second;
- return ValueTy();
- }
- ValueTy lookup(const char *Key) const {
- const_iterator it = find(Key);
- if (it != end())
- return it->second;
- return ValueTy();
- }
- ValueTy lookup(const std::string &Key) const {
+ ValueTy lookup(StringRef Key) const {
const_iterator it = find(Key);
if (it != end())
return it->second;
return ValueTy();
}
- ValueTy& operator[](const char *Key) {
- return GetOrCreateValue(Key, Key + strlen(Key)).getValue();
- }
- ValueTy& operator[](const std::string &Key) {
- const char* key_start = (Key.empty() ? NULL : &Key[0]);
- return GetOrCreateValue(key_start, key_start + Key.size()).getValue();
+ ValueTy& operator[](StringRef Key) {
+ return GetOrCreateValue(Key).getValue();
}
- size_type count(const char *KeyStart, const char *KeyEnd) const {
- return find(KeyStart, KeyEnd) == end() ? 0 : 1;
- }
- size_type count(const char *Key) const {
- return count(Key, Key + strlen(Key));
- }
- size_type count(const std::string &Key) const {
- const char* key_start = (Key.empty() ? NULL : &Key[0]);
- return count(key_start, key_start + Key.size());
+ size_type count(StringRef Key) const {
+ return find(Key) == end() ? 0 : 1;
}
/// insert - Insert the specified key/value pair into the map. If the key
/// already exists in the map, return false and ignore the request, otherwise
/// insert it and return true.
bool insert(MapEntryTy *KeyValue) {
- unsigned BucketNo =
- LookupBucketFor(KeyValue->getKeyData(),
- KeyValue->getKeyData()+KeyValue->getKeyLength());
+ unsigned BucketNo = LookupBucketFor(KeyValue->getKey());
ItemBucket &Bucket = TheTable[BucketNo];
if (Bucket.Item && Bucket.Item != getTombstoneVal())
return false; // Already exists in map.
/// exists, return it. Otherwise, default construct a value, insert it, and
/// return.
template <typename InitTy>
- StringMapEntry<ValueTy> &GetOrCreateValue(const char *KeyStart,
- const char *KeyEnd,
+ StringMapEntry<ValueTy> &GetOrCreateValue(StringRef Key,
InitTy Val) {
- unsigned BucketNo = LookupBucketFor(KeyStart, KeyEnd);
+ unsigned BucketNo = LookupBucketFor(Key);
ItemBucket &Bucket = TheTable[BucketNo];
if (Bucket.Item && Bucket.Item != getTombstoneVal())
return *static_cast<MapEntryTy*>(Bucket.Item);
- MapEntryTy *NewItem = MapEntryTy::Create(KeyStart, KeyEnd, Allocator, Val);
+ MapEntryTy *NewItem =
+ MapEntryTy::Create(Key.begin(), Key.end(), Allocator, Val);
if (Bucket.Item == getTombstoneVal())
--NumTombstones;
return *NewItem;
}
+ StringMapEntry<ValueTy> &GetOrCreateValue(StringRef Key) {
+ return GetOrCreateValue(Key, ValueTy());
+ }
+
+ template <typename InitTy>
+ StringMapEntry<ValueTy> &GetOrCreateValue(const char *KeyStart,
+ const char *KeyEnd,
+ InitTy Val) {
+ return GetOrCreateValue(StringRef(KeyStart, KeyEnd - KeyStart), Val);
+ }
+
StringMapEntry<ValueTy> &GetOrCreateValue(const char *KeyStart,
const char *KeyEnd) {
- return GetOrCreateValue(KeyStart, KeyEnd, ValueTy());
+ return GetOrCreateValue(StringRef(KeyStart, KeyEnd - KeyStart));
}
/// remove - Remove the specified key/value pair from the map, but do not
V.Destroy(Allocator);
}
- bool erase(const char *Key) {
- iterator I = find(Key);
- if (I == end()) return false;
- erase(I);
- return true;
- }
-
- bool erase(const std::string &Key) {
+ bool erase(StringRef Key) {
iterator I = find(Key);
if (I == end()) return false;
erase(I);
projects / oota-llvm.git / blobdiff