ReactionTokens.hpp

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// SPDX-License-Identifier: Apache-2.0
//
// Copyright 2026 Caleb Buahin
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

 
#ifndef OPENSWMM_ENGINE_DATA_REACTION_TOKENS_HPP
#define OPENSWMM_ENGINE_DATA_REACTION_TOKENS_HPP
 
#include <cstdint>
 
namespace openswmm {

enum class RxHydVar : int {
    D = 0,       
    Q,           
    U,           
    RE,          
    US,          
    FF,          
    AV,          
    HRT,         
    DT,          
    TEMP,        
    GW_THETA,    
    GW_POROSITY, 
    GW_SE,       
    GW_DEPTH_M,  
    COUNT_
};

struct RxToken {
    enum Op : uint8_t {
        PUSH_NUM = 0, 
        PUSH_SPECIES, 
        PUSH_COEF,    
        PUSH_TERM,    
        PUSH_HYDVAR,  
        PUSH_POLLUT,  
        ADD,
        SUB,
        MUL,
        DIV,
        POW,
        NEG,
        F_EXP,
        F_LOG,
        F_LOG10,
        F_SQRT,
        F_ABS,
        F_SGN,
        F_STEP,
        F_SIN,
        F_COS,
        F_TAN,
        F_MIN,
        F_MAX 
    };
    uint8_t op = PUSH_NUM;
    int32_t idx = 0;
    double value = 0.0;
};

struct RxExprSpan {
    int32_t begin = 0;
    int32_t len = 0;
};

inline constexpr int kRxMaxStackDepth = 32;
 
} // namespace openswmm
 
#endif // OPENSWMM_ENGINE_DATA_REACTION_TOKENS_HPP