/*
   There are a total of 8 entries in the algebraic variable array.
   There are a total of 3 entries in each of the rate and state variable arrays.
   There are a total of 8 entries in the constant variable array.
 */
/*
 * VOI is t in component environment (second).
 * CONSTANTS[0] is R in component environment (J_per_K_per_mol).
 * CONSTANTS[1] is T in component environment (kelvin).
 * CONSTANTS[2] is F in component environment (C_per_mol).
 * CONSTANTS[3] is C_m in component environment (fF).
 * STATES[0] is q_K_o in component environment (fmol).
 * STATES[1] is q_K_i in component environment (fmol).
 * ALGEBRAIC[6] is v_K_ATP in component K_ATP (fmol_per_sec).
 * STATES[2] is q_mem in component environment (fC).
 * ALGEBRAIC[7] is I_mem_K_ATP in component K_ATP (fA).
 * CONSTANTS[4] is kappa_K_ATP in component K_ATP_parameters (fmol_per_sec).
 * CONSTANTS[5] is K_K_i in component K_ATP_parameters (per_fmol).
 * CONSTANTS[6] is K_K_o in component K_ATP_parameters (per_fmol).
 * CONSTANTS[7] is zK in component K_ATP_parameters (dimensionless).
 * ALGEBRAIC[1] is mu_K_o in component K_ATP (J_per_mol).
 * ALGEBRAIC[2] is mu_K_i in component K_ATP (J_per_mol).
 * ALGEBRAIC[4] is Am_K_ATP in component K_ATP (J_per_mol).
 * ALGEBRAIC[3] is Af_K_ATP in component K_ATP (J_per_mol).
 * ALGEBRAIC[5] is Ar_K_ATP in component K_ATP (J_per_mol).
 * ALGEBRAIC[0] is V_mem in component K_ATP (volt).
 * RATES[0] is d/dt q_K_o in component environment (fmol).
 * RATES[1] is d/dt q_K_i in component environment (fmol).
 * RATES[2] is d/dt q_mem in component environment (fC).
 */
void
initConsts(double* CONSTANTS, double* RATES, double *STATES)
{
CONSTANTS[0] = 8.314;
CONSTANTS[1] = 310;
CONSTANTS[2] = 96485;
CONSTANTS[3] = 153400;
STATES[0] = 27.9828;
STATES[1] = 5510;
STATES[2] = -13039;
CONSTANTS[4] = 1.1812e-05;
CONSTANTS[5] = 9.99086e-05;
CONSTANTS[6] = 0.000663229;
CONSTANTS[7] = 1;
}
void
computeRates(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
ALGEBRAIC[0] = STATES[2]/CONSTANTS[3];
ALGEBRAIC[4] =  CONSTANTS[7]*CONSTANTS[2]*ALGEBRAIC[0];
ALGEBRAIC[2] =  CONSTANTS[0]*CONSTANTS[1]*log( CONSTANTS[5]*STATES[1]);
ALGEBRAIC[3] = ALGEBRAIC[2]+ CONSTANTS[7]*CONSTANTS[2]*ALGEBRAIC[0];
ALGEBRAIC[1] =  CONSTANTS[0]*CONSTANTS[1]*log( CONSTANTS[6]*STATES[0]);
ALGEBRAIC[5] = ALGEBRAIC[1];
ALGEBRAIC[6] = (ALGEBRAIC[4]==0.00000 ?  CONSTANTS[4]*(exp(ALGEBRAIC[3]/( CONSTANTS[0]*CONSTANTS[1])) - exp(ALGEBRAIC[5]/( CONSTANTS[0]*CONSTANTS[1]))) :  ((( CONSTANTS[4]*ALGEBRAIC[4])/( CONSTANTS[0]*CONSTANTS[1]))/(exp(ALGEBRAIC[4]/( CONSTANTS[0]*CONSTANTS[1])) - 1.00000))*(exp(ALGEBRAIC[3]/( CONSTANTS[0]*CONSTANTS[1])) - exp(ALGEBRAIC[5]/( CONSTANTS[0]*CONSTANTS[1]))));
RATES[0] = ALGEBRAIC[6];
RATES[1] = - ALGEBRAIC[6];
ALGEBRAIC[7] =  CONSTANTS[2]*- CONSTANTS[7]*ALGEBRAIC[6];
RATES[2] = ALGEBRAIC[7];
}
void
computeVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
ALGEBRAIC[0] = STATES[2]/CONSTANTS[3];
ALGEBRAIC[4] =  CONSTANTS[7]*CONSTANTS[2]*ALGEBRAIC[0];
ALGEBRAIC[2] =  CONSTANTS[0]*CONSTANTS[1]*log( CONSTANTS[5]*STATES[1]);
ALGEBRAIC[3] = ALGEBRAIC[2]+ CONSTANTS[7]*CONSTANTS[2]*ALGEBRAIC[0];
ALGEBRAIC[1] =  CONSTANTS[0]*CONSTANTS[1]*log( CONSTANTS[6]*STATES[0]);
ALGEBRAIC[5] = ALGEBRAIC[1];
ALGEBRAIC[6] = (ALGEBRAIC[4]==0.00000 ?  CONSTANTS[4]*(exp(ALGEBRAIC[3]/( CONSTANTS[0]*CONSTANTS[1])) - exp(ALGEBRAIC[5]/( CONSTANTS[0]*CONSTANTS[1]))) :  ((( CONSTANTS[4]*ALGEBRAIC[4])/( CONSTANTS[0]*CONSTANTS[1]))/(exp(ALGEBRAIC[4]/( CONSTANTS[0]*CONSTANTS[1])) - 1.00000))*(exp(ALGEBRAIC[3]/( CONSTANTS[0]*CONSTANTS[1])) - exp(ALGEBRAIC[5]/( CONSTANTS[0]*CONSTANTS[1]))));
ALGEBRAIC[7] =  CONSTANTS[2]*- CONSTANTS[7]*ALGEBRAIC[6];
}