You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
2.0 KiB
77 lines
2.0 KiB
/*
|
|
* Copyright 2016 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#ifndef SkUrlDataManager_DEFINED
|
|
#define SkUrlDataManager_DEFINED
|
|
|
|
#include "SkData.h"
|
|
#include "SkOpts.h"
|
|
#include "SkString.h"
|
|
#include "SkTDynamicHash.h"
|
|
|
|
/*
|
|
* A simple class which allows clients to add opaque data types, and returns a url where this data
|
|
* will be hosted. Its up to the owner of this class to actually serve the data.
|
|
*/
|
|
bool operator==(const SkData& a, const SkData& b);
|
|
|
|
class UrlDataManager {
|
|
public:
|
|
UrlDataManager(SkString rootUrl);
|
|
~UrlDataManager() { this->reset(); }
|
|
|
|
/*
|
|
* Adds a data blob to the cache with a particular content type. UrlDataManager will hash
|
|
* the blob data to ensure uniqueness
|
|
*/
|
|
SkString addData(SkData*, const char* contentType);
|
|
|
|
struct UrlData : public SkRefCnt {
|
|
SkString fUrl;
|
|
SkString fContentType;
|
|
sk_sp<SkData> fData;
|
|
};
|
|
|
|
/*
|
|
* returns the UrlData object which should be hosted at 'url'
|
|
*/
|
|
UrlData* getDataFromUrl(SkString url) {
|
|
return fUrlLookup.find(url);
|
|
}
|
|
void reset();
|
|
|
|
private:
|
|
struct LookupTrait {
|
|
// We use the data as a hash, this is not really optimal but is fine until proven otherwise
|
|
static const SkData& GetKey(const UrlData& data) {
|
|
return *data.fData.get();
|
|
}
|
|
|
|
static uint32_t Hash(const SkData& key) {
|
|
return SkOpts::hash(key.bytes(), key.size());
|
|
}
|
|
};
|
|
|
|
struct ReverseLookupTrait {
|
|
static const SkString& GetKey(const UrlData& data) {
|
|
return data.fUrl;
|
|
}
|
|
|
|
static uint32_t Hash(const SkString& key) {
|
|
return SkOpts::hash(key.c_str(), strlen(key.c_str()));
|
|
}
|
|
};
|
|
|
|
|
|
SkString fRootUrl;
|
|
SkTDynamicHash<UrlData, SkData, LookupTrait> fCache;
|
|
SkTDynamicHash<UrlData, SkString, ReverseLookupTrait> fUrlLookup;
|
|
uint32_t fDataId;
|
|
};
|
|
|
|
#endif
|