/*
   There are a total of 2 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 time in component environment (hour).
 * STATES[0] is R in component R (pg_ml).
 * CONSTANTS[0] is L_ in component R (ng_ml).
 * CONSTANTS[1] is T_ in component R (ng_ml).
 * CONSTANTS[2] is dR in component R (first_order_rate_constant).
 * CONSTANTS[3] is rR in component R (ng_ml_min).
 * ALGEBRAIC[1] is H in component R (dimensionless).
 * ALGEBRAIC[0] is x in component R (dimensionless).
 * STATES[1] is L in component L (ng_ml).
 * STATES[2] is T in component T (ng_ml).
 * CONSTANTS[4] is dL in component L (first_order_rate_constant).
 * CONSTANTS[5] is rL in component L (first_order_rate_constant).
 * CONSTANTS[6] is dT in component T (first_order_rate_constant).
 * CONSTANTS[7] is rT in component T (first_order_rate_constant).
 * RATES[0] is d/dt R in component R (pg_ml).
 * RATES[1] is d/dt L in component L (ng_ml).
 * RATES[2] is d/dt T in component T (ng_ml).
 * There are a total of 2 condition variables.
 */
void
initConsts(double* CONSTANTS, double* RATES, double *STATES)
{
STATES[0] = 0.0;
CONSTANTS[0] = 30.0;
CONSTANTS[1] = 8.0;
CONSTANTS[2] = 0.10;
CONSTANTS[3] = 0.1;
STATES[1] = 10.0;
STATES[2] = 12.0;
CONSTANTS[4] = 0.015;
CONSTANTS[5] = 5.0;
CONSTANTS[6] = 0.023;
CONSTANTS[7] = 0.01;
RATES[0] = 0.1001;
RATES[1] = 0.1001;
RATES[2] = 0.1001;
}
void
computeResiduals(double VOI, double* CONSTANTS, double* RATES, double* OLDRATES, double* STATES,
                 double* OLDSTATES, double* ALGEBRAIC, double* CONDVARS)
{
resid[0] = RATES[0] -  CONSTANTS[3]*ALGEBRAIC[1] -  CONSTANTS[2]*STATES[0];
resid[1] = RATES[1] -  CONSTANTS[5]*STATES[0] -  CONSTANTS[4]*STATES[1];
resid[2] = RATES[2] -  CONSTANTS[7]*STATES[1] -  CONSTANTS[6]*STATES[2];
}
void
computeVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
}
void
computeEssentialVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
ALGEBRAIC[0] = 2.00000 - (STATES[1]/CONSTANTS[0]+STATES[2]/CONSTANTS[1]);
ALGEBRAIC[1] = (CONDVAR[0]<0.00000 ? 0.00000 : ALGEBRAIC[0]==0.00000 ? 0.500000 : CONDVAR[1]>0.00000 ? 1.00000 : 0.0/0.0);
}
void
getStateInformation(double* SI)
{
SI[0] = 1.0;
SI[1] = 1.0;
SI[2] = 1.0;
}
void
computeRoots(double VOI, double* CONSTANTS, double* RATES, double* OLDRATES, double* STATES,
             double* OLDSTATES, double* ALGEBRAIC, double* CONDVARS)
{
CONDVAR[0] = ALGEBRAIC[0] - 0.00000;
CONDVAR[1] = ALGEBRAIC[0] - 0.00000;
}