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path: root/include/core/custom_gate.h
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#pragma once

#include <stddef.h>

#include "core/quantum_components.h"
#include "maths/matrix.h"

enum PsiCompositeOp
{
    PSI_OP_H,
    PSI_OP_X,
    PSI_OP_Y,
    PSI_OP_Z,
    PSI_OP_S,
    PSI_OP_T,
    PSI_OP_CNOT,
    PSI_OP_CZ,
    PSI_OP_SWAP,
    PSI_OP_CCNOT,
    PSI_OP_CSWAP,
};

struct PsiCompositeGateOp
{
    enum PsiCompositeOp op;
    size_t targets[3];
    size_t target_count;
};

enum PsiCustomGateKind
{
    PSI_CUSTOM_GATE_MATRIX,
    PSI_CUSTOM_GATE_COMPOSITE,
};

struct PsiCustomGate
{
    const char* name;
    size_t num_qubits;
    enum PsiCustomGateKind kind;
    union
    {
        struct PsiMatrix matrix;
        struct
        {
            struct PsiCompositeGateOp* ops;
            size_t count;
        } composite;
    } definition;
};

struct PsiCustomGate psi_new_custom_gate_from_matrix(const char* name, struct PsiMatrix matrix);
struct PsiCustomGate psi_new_custom_gate_from_composite(const char* name, size_t num_qubits,
                                                        const struct PsiCompositeGateOp* ops,
                                                        size_t op_count);
void psi_free_custom_gate(struct PsiCustomGate* gate);

struct PsiQuantumGate psi_to_quantum_gate(struct PsiCustomGate gate);