gecko-dev/netwerk/cache2/CacheFileUtils.h

94 lines
2.4 KiB
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef CacheFileUtils__h__
#define CacheFileUtils__h__
#include "nsError.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsTArray.h"
class nsILoadContextInfo;
class nsACString;
namespace mozilla {
namespace net {
namespace CacheFileUtils {
already_AddRefed<nsILoadContextInfo>
ParseKey(const nsCSubstring &aKey,
nsCSubstring *aIdEnhance = nullptr,
nsCSubstring *aURISpec = nullptr);
void
AppendKeyPrefix(nsILoadContextInfo *aInfo, nsACString &_retval);
void
AppendTagWithValue(nsACString & aTarget, char const aTag, nsCSubstring const & aValue);
nsresult
KeyMatchesLoadContextInfo(const nsACString &aKey,
nsILoadContextInfo *aInfo,
bool *_retval);
class ValidityPair {
public:
ValidityPair(uint32_t aOffset, uint32_t aLen);
ValidityPair& operator=(const ValidityPair& aOther);
// Returns true when two pairs can be merged, i.e. they do overlap or the one
// ends exactly where the other begins.
bool CanBeMerged(const ValidityPair& aOther) const;
// Returns true when aOffset is placed anywhere in the validity interval or
// exactly after its end.
bool IsInOrFollows(uint32_t aOffset) const;
// Returns true when this pair has lower offset than the other pair. In case
// both pairs have the same offset it returns true when this pair has a
// shorter length.
bool LessThan(const ValidityPair& aOther) const;
// Merges two pair into one.
void Merge(const ValidityPair& aOther);
uint32_t Offset() const { return mOffset; }
uint32_t Len() const { return mLen; }
private:
uint32_t mOffset;
uint32_t mLen;
};
class ValidityMap {
public:
// Prints pairs in the map into log.
void Log() const;
// Returns number of pairs in the map.
uint32_t Length() const;
// Adds a new pair to the map. It keeps the pairs ordered and merges pairs
// when possible.
void AddPair(uint32_t aOffset, uint32_t aLen);
// Removes all pairs from the map.
void Clear();
size_t SizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
ValidityPair& operator[](uint32_t aIdx);
private:
nsTArray<ValidityPair> mMap;
};
} // CacheFileUtils
} // net
} // mozilla
#endif