Squashed 'src/minisketch/' content from commit 89629eb2c7

git-subtree-dir: src/minisketch
git-subtree-split: 89629eb2c7e262b39ba489b93b111760baded4b3

src/sketch.h

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+/**********************************************************************
+ * Copyright (c) 2018 Pieter Wuille, Greg Maxwell, Gleb Naumenko      *
+ * Distributed under the MIT software license, see the accompanying   *
+ * file LICENSE or http://www.opensource.org/licenses/mit-license.php.*
+ **********************************************************************/
+
+#ifndef _MINISKETCH_STATE_H_
+#define _MINISKETCH_STATE_H_
+
+#include <stdint.h>
+#include <stdlib.h>
+
+/** Abstract class for internal representation of a minisketch object. */
+class Sketch
+{
+    uint64_t m_canary;
+    const int m_implementation;
+    const int m_bits;
+
+public:
+    Sketch(int implementation, int bits) : m_implementation(implementation), m_bits(bits) {}
+
+    void Ready() { m_canary = 0x6d496e536b65LU; }
+    void Check() const { if (m_canary != 0x6d496e536b65LU) abort(); }
+    void UnReady() { m_canary = 1; }
+    int Implementation() const { return m_implementation; }
+    int Bits() const { return m_bits; }
+
+    virtual ~Sketch() {}
+    virtual size_t Syndromes() const = 0;
+
+    virtual void Init(int syndromes) = 0;
+    virtual void Add(uint64_t element) = 0;
+    virtual void Serialize(unsigned char*) const = 0;
+    virtual void Deserialize(const unsigned char*) = 0;
+    virtual size_t Merge(const Sketch* other_sketch) = 0;
+    virtual void SetSeed(uint64_t seed) = 0;
+
+    virtual int Decode(int max_count, uint64_t* roots) const = 0;
+};
+
+#endif