/*
   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 7 entries in the constant variable array.
 */
/*
 * VOI is time in component environment (hour).
 * STATES[0] is R in component R (ng_ml).
 * CONSTANTS[0] is h in component R (first_order_rate_constant).
 * CONSTANTS[1] is c in component R (ng_ml_hr).
 * CONSTANTS[2] is b1 in component R (first_order_rate_constant).
 * ALGEBRAIC[1] is H in component R (dimensionless).
 * ALGEBRAIC[0] is x in component R (ng_ml).
 * STATES[1] is T in component T (ng_ml).
 * STATES[2] is L in component L (ng_ml).
 * CONSTANTS[3] is g1 in component L (first_order_rate_constant).
 * CONSTANTS[4] is b2 in component L (first_order_rate_constant).
 * CONSTANTS[5] is g2 in component T (first_order_rate_constant).
 * CONSTANTS[6] is b3 in component T (first_order_rate_constant).
 * RATES[0] is d/dt R in component R (ng_ml).
 * RATES[2] is d/dt L in component L (ng_ml).
 * RATES[1] is d/dt T in component T (ng_ml).
 * There are a total of 1 condition variables.
 */
void
initConsts(double* CONSTANTS, double* RATES, double *STATES)
{
STATES[0] = 0.5;
CONSTANTS[0] = 12;
CONSTANTS[1] = 100;
CONSTANTS[2] = 1.29;
STATES[1] = 15;
STATES[2] = 22;
CONSTANTS[3] = 10;
CONSTANTS[4] = 0.97;
CONSTANTS[5] = 0.7;
CONSTANTS[6] = 1.39;
RATES[0] = 0.1001;
RATES[2] = 0.1001;
RATES[1] = 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[1] -  CONSTANTS[0]*STATES[1])*(1.00000 - ALGEBRAIC[1]) -  CONSTANTS[2]*STATES[0];
resid[1] = RATES[2] -  CONSTANTS[3]*STATES[0] -  CONSTANTS[4]*STATES[2];
resid[2] = RATES[1] -  CONSTANTS[5]*STATES[2] -  CONSTANTS[6]*STATES[1];
}
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] = STATES[1] - CONSTANTS[1]/CONSTANTS[0];
ALGEBRAIC[1] = (CONDVAR[0]>0.00000 ? 1.00000 : 0.00000);
}
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;
}