/*
   There are a total of 9 entries in the algebraic variable array.
   There are a total of 7 entries in each of the rate and state variable arrays.
   There are a total of 3 entries in the constant variable array.
 */
/*
 * VOI is t in component main (second).
 * STATES[0] is q_C in component main (coulomb).
 * ALGEBRAIC[7] is v_C in component main (C_per_s).
 * ALGEBRAIC[0] is v_R in component main (C_per_s).
 * STATES[1] is v_L in component main (C_per_s).
 * STATES[3] is a_L in component main (C_per_s2).
 * ALGEBRAIC[1] is u_C in component main (J_per_C).
 * ALGEBRAIC[2] is u_R in component main (J_per_C).
 * STATES[4] is u_L in component main (J_per_C).
 * CONSTANTS[0] is C in component main (C2_per_J).
 * CONSTANTS[1] is R in component main (Js_per_C2).
 * CONSTANTS[2] is L in component main (Js2_per_C2).
 * ALGEBRAIC[8] is P_C in component main (watt).
 * ALGEBRAIC[3] is P_R in component main (watt).
 * STATES[5] is P_L in component main (watt).
 * STATES[6] is P_tot in component main (watt).
 * ALGEBRAIC[4] is E_C in component main (joule).
 * STATES[2] is E_R in component main (joule).
 * ALGEBRAIC[5] is E_L in component main (joule).
 * ALGEBRAIC[6] is E_tot in component main (joule).
 * RATES[1] is d/dt v_L in component main (C_per_s).
 * RATES[0] is d/dt q_C in component main (coulomb).
 * RATES[2] is d/dt E_R in component main (joule).
 * There are a total of 0 condition variables.
 */
void
initConsts(double* CONSTANTS, double* RATES, double *STATES)
{
STATES[0] = 1;
STATES[1] = 0;
CONSTANTS[0] = 20;
CONSTANTS[1] = 2;
CONSTANTS[2] = 10;
STATES[2] = 0;
STATES[3] = 0.1001;
STATES[4] = 0.1001;
STATES[5] = 0.1001;
STATES[6] = 0.1001;
RATES[1] = 0.1001;
RATES[0] = 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[1] - STATES[3];
resid[1] = RATES[0] - ALGEBRAIC[7];
resid[2] = ALGEBRAIC[1] - ALGEBRAIC[2]+STATES[4];
resid[3] = STATES[4] -  STATES[3]*CONSTANTS[2];
resid[4] = STATES[5] -  STATES[4]*STATES[1];
resid[5] = STATES[6] - ALGEBRAIC[8]+ALGEBRAIC[3]+STATES[5];
resid[6] = RATES[2] - ALGEBRAIC[3];
}
void
computeVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
ALGEBRAIC[4] =  (( 0.500000*1.00000)/CONSTANTS[0])*pow(STATES[0], 2.00000);
ALGEBRAIC[5] =  0.500000*CONSTANTS[2]*pow(STATES[1], 2.00000);
ALGEBRAIC[6] = ALGEBRAIC[4]+ALGEBRAIC[5]+STATES[2];
}
void
computeEssentialVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
ALGEBRAIC[1] = STATES[0]/CONSTANTS[0];
ALGEBRAIC[0] = STATES[1];
ALGEBRAIC[2] =  ALGEBRAIC[0]*CONSTANTS[1];
ALGEBRAIC[3] =  ALGEBRAIC[2]*ALGEBRAIC[0];
ALGEBRAIC[7] = - ALGEBRAIC[0];
ALGEBRAIC[8] =  ALGEBRAIC[1]*ALGEBRAIC[7];
}
void
getStateInformation(double* SI)
{
SI[0] = 1.0;
SI[1] = 1.0;
SI[3] = 0.0;
SI[4] = 0.0;
SI[5] = 0.0;
SI[6] = 0.0;
SI[2] = 1.0;
}
void
computeRoots(double VOI, double* CONSTANTS, double* RATES, double* OLDRATES, double* STATES,
             double* OLDSTATES, double* ALGEBRAIC, double* CONDVARS)
{
}