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Ignore:
Timestamp:
10/22/18 10:02:42 (6 years ago)
Author:
gkronber
Message:

#2925 extracted CVODES external methods into a separate class

File:
1 edited

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Added
Removed

  • branches/2925_AutoDiffForDynamicalModels/HeuristicLab.Problems.DynamicalSystemsModelling/3.3/Problem.cs

    r16246 r16248  
    2424using System.Diagnostics;
    2525using System.Linq;
    26 using System.Runtime.InteropServices;
    2726using HeuristicLab.Analysis;
    2827using HeuristicLab.Collections;
    … …  
    132131  [StorableClass]
    133132  public sealed class Problem : SingleObjectiveBasicProblem<MultiEncoding>, IRegressionProblem, IProblemInstanceConsumer<IRegressionProblemData>, IProblemInstanceExporter<IRegressionProblemData> {
    134 
    135     // CVODES types
    136     public enum MultistepMethod : int { CV_ADAMS = 1, CV_BDF = 2 };
    137     public enum NonlinearSolverIteration : int { CV_NEWTON = 1, CV_FUNCTIONAL = 2 };
    138 
    139 
    140     /* itask */
    141     public const int CV_NORMAL = 1;
    142     public const int CV_ONE_STEP = 2;
    143 
    144     /* ism */
    145     public const int CV_SIMULTANEOUS = 1;
    146     public const int CV_STAGGERED = 2;
    147     public const int CV_STAGGERED1 = 3;
    148 
    149     /* DQtype */
    150     public const int CV_CENTERED = 1;
    151     public const int CV_FORWARD = 2;
    152 
    153     /* interp */
    154     public const int CV_HERMITE = 1;
    155     public const int CV_POLYNOMIAL = 2;
    156 
    157     /*
    158      * ----------------------------------------
    159      * CVODES return flags
    160      * ----------------------------------------
    161      */
    162 
    163     public const int CV_SUCCESS = 0;
    164     public const int CV_TSTOP_RETURN = 1;
    165     public const int CV_ROOT_RETURN = 2;
    166 
    167     public const int CV_WARNING = 99;
    168 
    169     public const int CV_TOO_MUCH_WORK = -1;
    170     public const int CV_TOO_MUCH_ACC = -2;
    171     public const int CV_ERR_FAILURE = -3;
    172     public const int CV_CONV_FAILURE = -4;
    173 
    174     public const int CV_LINIT_FAIL = -5;
    175     public const int CV_LSETUP_FAIL = -6;
    176     public const int CV_LSOLVE_FAIL = -7;
    177     public const int CV_RHSFUNC_FAIL = -8;
    178     public const int CV_FIRST_RHSFUNC_ERR = -9;
    179     public const int CV_REPTD_RHSFUNC_ERR = -10;
    180     public const int CV_UNREC_RHSFUNC_ERR = -11;
    181     public const int CV_RTFUNC_FAIL = -12;
    182     public const int CV_CONSTR_FAIL = -13;
    183 
    184     public const int CV_MEM_FAIL = -20;
    185     public const int CV_MEM_NULL = -21;
    186     public const int CV_ILL_INPUT = -22;
    187     public const int CV_NO_MALLOC = -23;
    188     public const int CV_BAD_K = -24;
    189     public const int CV_BAD_T = -25;
    190     public const int CV_BAD_DKY = -26;
    191     public const int CV_TOO_CLOSE = -27;
    192 
    193     public const int CV_NO_QUAD = -30;
    194     public const int CV_QRHSFUNC_FAIL = -31;
    195     public const int CV_FIRST_QRHSFUNC_ERR = -32;
    196     public const int CV_REPTD_QRHSFUNC_ERR = -33;
    197     public const int CV_UNREC_QRHSFUNC_ERR = -34;
    198 
    199     public const int CV_NO_SENS = -40;
    200     public const int CV_SRHSFUNC_FAIL = -41;
    201     public const int CV_FIRST_SRHSFUNC_ERR = -42;
    202     public const int CV_REPTD_SRHSFUNC_ERR = -43;
    203     public const int CV_UNREC_SRHSFUNC_ERR = -44;
    204 
    205     public const int CV_BAD_IS = -45;
    206 
    207     public const int CV_NO_QUADSENS = -50;
    208     public const int CV_QSRHSFUNC_FAIL = -51;
    209     public const int CV_FIRST_QSRHSFUNC_ERR = -52;
    210     public const int CV_REPTD_QSRHSFUNC_ERR = -53;
    211     public const int CV_UNREC_QSRHSFUNC_ERR = -54;
    212 
    213     /*
    214      * ----------------------------------------
    215      * CVODEA return flags
    216      * ----------------------------------------
    217      */
    218 
    219     public const int CV_NO_ADJ = -101;
    220     public const int CV_NO_FWD = -102;
    221     public const int CV_NO_BCK = -103;
    222     public const int CV_BAD_TB0 = -104;
    223     public const int CV_REIFWD_FAIL = -105;
    224     public const int CV_FWD_FAIL = -106;
    225 
    226 
    227     public const int CV_GETY_BADT = -107;
    228 
    229     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    230     public delegate int CVRhsFunc(
    231         double t, // realtype
    232         IntPtr y, // N_Vector
    233         IntPtr ydot, // N_Vector
    234         IntPtr user_data
    235       );
    236 
    237     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    238     public delegate int CVRhsFuncB(
    239         double t, // realtype
    240         IntPtr y, // N_Vector
    241         IntPtr yB, // N_Vector
    242         IntPtr yBdot, // N_Vector
    243         IntPtr user_data
    244       );
    245 
    246     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    247     public delegate int CVDlsJacFunc(
    248       double t,
    249       IntPtr y, // N_Vector
    250       IntPtr fy, // N_Vector
    251       IntPtr Jac, // SUNMatrix
    252       IntPtr user_data,
    253       IntPtr tmp1, // N_Vector
    254       IntPtr tmp2, // N_Vector
    255       IntPtr tmp3 // N_Vector
    256       );
    257 
    258     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    259     public delegate int CVDlsJacFuncB(
    260       double t,
    261       IntPtr y, // N_Vector
    262       IntPtr yB, // N_Vector
    263       IntPtr fyB, // N_Vector
    264       IntPtr Jac, // SUNMatrix
    265       IntPtr user_data,
    266       IntPtr tmp1, // N_Vector
    267       IntPtr tmp2, // N_Vector
    268       IntPtr tmp3 // N_Vector
    269     );
    270 
    271     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    272     public delegate int CVQuadRhsFn(
    273       double t,
    274       IntPtr y, // N_Vector
    275       IntPtr yQdot, // N_Vector
    276       IntPtr user_data
    277       );
    278 
    279     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    280     public delegate int CVQuadRhsFnB(
    281       double t,
    282       IntPtr y, // N_Vector
    283       IntPtr yB, // N_Vector
    284       IntPtr qBdot, // N_Vector
    285       IntPtr user_data
    286       );
    287 
    288 
    289     // to calculate sensitivities RHS for all equations at once
    290     // must compute (∂f/∂y)s_i(t) + ∂f/∂p_i
    291     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    292     public delegate int CVSensRhsFn(
    293       int Ns,
    294       double t,
    295       IntPtr y, // N_Vector
    296       IntPtr ydot, // N_Vector
    297       IntPtr yS, // N_Vector* one vector for each parameter
    298       IntPtr ySdot, // N_Vector* one vector for each parameter
    299       IntPtr user_data,
    300       IntPtr tmp1, // N_Vector
    301       IntPtr tmp2 // N_Vector
    302     );
    303 
    304     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeCreate", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    305     // returns a void* to the cvodes memory block if successful otherwise NULL
    306     public static extern IntPtr CVodeCreate(MultistepMethod lmm, NonlinearSolverIteration iter);
    307 
    308     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeInit", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    309     public static extern int CVodeInit(
    310       IntPtr cvode_mem, // pointer returned by CVodeCreate
    311       CVRhsFunc f,
    312       double t0, // realtype, the inital value of t
    313       IntPtr y0 // N_Vector the initial value of y
    314     );
    315 
    316 
    317     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeSStolerances", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    318     public static extern int CVodeSStolerances(
    319       IntPtr cvode_mem,
    320       double reltol,
    321       double abstol
    322       );
    323 
    324     [DllImport("sundials_cvodes.dll", EntryPoint = "CVDlsSetLinearSolver", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    325     public static extern int CVDlsSetLinearSolver(
    326       IntPtr cvode_mem,
    327       IntPtr linearSolver, // SUNLinearSolver
    328       IntPtr j // SUNMatrix
    329       );
    330 
    331     [DllImport("sundials_cvodes.dll", EntryPoint = "CVDlsSetJacFn", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    332     public static extern int CVDlsSetJacFn(
    333       IntPtr cvode_mem,
    334       CVDlsJacFunc jacFunc
    335       );
    336 
    337     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeSensInit", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    338     public static extern int CVodeSensInit(
    339       IntPtr cvode_mem,
    340       int Ns, // number of parameters
    341       int ism, // sensitivity solution method, CV_SIMULTANEOUS or CV_STAGGERED
    342       CVSensRhsFn fS, // right hand side function which computes all sensitivity RHS at the same time
    343       IntPtr yS0 // N_Vector
    344       );
    345 
    346     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeSensSStolerances", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    347     public static extern int CVodeSensSStolerances(
    348       IntPtr cvode_mem,
    349       double reltol,
    350       double[] abstol
    351     );
    352 
    353     /* Call CVodeSensEEtolerances to estimate tolerances for sensitivity
    354    variables based on the rolerances supplied for states variables and
    355    the scaling factor pbar */
    356     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeSensEEtolerances", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    357     public static extern int CVodeSensEEtolerances(
    358       IntPtr cvode_mem
    359       );
    360 
    361     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeGetSens", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    362     public static extern int CVodeGetSens(
    363       IntPtr cvode_mem,
    364       ref double tret,
    365       IntPtr yS //N_Vector*, one vector for each parameter
    366       );
    367 
    368     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeQuadInit", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    369     public static extern int CVodeQuadInit(
    370       IntPtr cvode_mem,
    371       CVQuadRhsFn qF,
    372       IntPtr yQ0 // N_Vector, initial value of yQ
    373       );
    374 
    375     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeQuadInitB", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    376     public static extern int CVodeQuadInitB(
    377       IntPtr cvode_mem,
    378       int indexB,
    379       CVQuadRhsFnB rhsQB,
    380       IntPtr yQB0 // N_Vector, initial value of yQB
    381     );
    382 
    383 
    384     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeAdjInit", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    385     public static extern int CVodeAdjInit(
    386       IntPtr cvode_mem,
    387       int nd,  // integration steps between checkpoints
    388       int interpType // either CV_POLYNOMIAL or CV_HERMITE
    389       );
    390 
    391     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeF", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    392     public static extern int CVodeF(
    393         IntPtr cvode_mem,
    394         double t_out, // the next time at which a computed solution is desired
    395         IntPtr y, // N_Vector, the solution vector y
    396         ref double t_ret, // the time reached by the solver (output)
    397         int itask, // CV_NORMAL or CV_ONE_STEP
    398         ref int ncheck  // the number of internal checkpoints stored so far.
    399       );
    400 
    401     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeGetNumSteps", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    402     public static extern int CVodeGetNumSteps(
    403       IntPtr cvode_mem,
    404       ref long ncheck  // the number of steps taken
    405     );
    406 
    407     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeCreateB", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    408     public static extern int CVodeCreateB(
    409         IntPtr cvode_mem,
    410         MultistepMethod lmmB,
    411         NonlinearSolverIteration iterB,
    412         ref int which
    413       );
    414 
    415     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeInitB", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    416     public static extern int CVodeInitB(
    417         IntPtr cvode_mem,
    418         int which,
    419         CVRhsFuncB rightHandSide,
    420         double tB0, // endpoint T where final conditions are provided (equal to endpoint of forward integration)
    421         IntPtr yB0 // N_Vector inital value at t=tb0 of backward solution
    422       );
    423 
    424     [DllImport("sundials_cvodes.dll", EntryPoint = "CVode", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    425     public static extern int CVode(
    426       IntPtr cvode_mem,
    427       double tout, // next time at which a solution is desired
    428       IntPtr yout, // N_Vector
    429       ref double tret, // the time reached by the solver (output)
    430       int itask // flag indicating the job of the solver for the next step.
    431       );
    432 
    433 
    434     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeSStolerancesB", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    435     public static extern int CVodeSStolerancesB(
    436       IntPtr cvode_mem,
    437       int which,
    438       double reltol,
    439       double abstol
    440     );
    441 
    442     [DllImport("sundials_cvodes.dll", EntryPoint = "CVDlsSetLinearSolverB", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    443     public static extern int CVDlsSetLinearSolverB(
    444       IntPtr cvode_mem,
    445       int which,
    446       IntPtr linearSolver, // SUNLinearSolver
    447       IntPtr j // SUNMatrix
    448     );
    449 
    450     [DllImport("sundials_cvodes.dll", EntryPoint = "CVDlsSetJacFnB", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    451     public static extern int CVDlsSetJacFnB(
    452       IntPtr cvode_mem,
    453       int which,
    454       CVDlsJacFuncB jacFunc
    455     );
    456 
    457     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeB", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    458     public static extern int CVodeB(
    459       IntPtr cvode_mem,
    460       double tout, // next time at which a solution is desired
    461       int itask // flag indicating the job of the solver for the next step.
    462     );
    463 
    464     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeGetB", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    465     public static extern int CVodeGetB(
    466           IntPtr cvode_mem,
    467           int which,
    468           ref double tret,
    469           IntPtr yB // the backward solution at time tret
    470         );
    471     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeGetAdjY", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    472     public static extern int CVodeGetAdjY(
    473           IntPtr cvode_mem,
    474           double t,
    475           IntPtr y // the forward solution y(t)
    476         );
    477 
    478     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeGetAdjCVodeBmem", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    479     public static extern IntPtr CVodeGetAdjCVodeBmem(
    480               IntPtr cvode_mem,
    481               int which
    482             );
    483 
    484     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeGetQuadB", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    485     public static extern int CVodeGetQuadB(
    486         IntPtr cvode_mem,
    487         int which,
    488         ref double tret,
    489         IntPtr yQB // N_Vector
    490       );
    491 
    492     [DllImport("sundials_cvodes.dll", EntryPoint = "CVodeFree", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    493 
    494     public static extern int CVodeFree(IntPtr cvode_mem);
    495 
    496     #region matrix
    497     [DllImport("sundials_cvodes.dll", EntryPoint = "SUNDenseMatrix", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    498     public static extern IntPtr SUNDenseMatrix(long m, long n);
    499 
    500     [DllImport("sundials_cvodes.dll", EntryPoint = "SUNMatDestroy", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    501     public static extern void SUNMatDestroy(IntPtr A);
    502 
    503     [DllImport("sundials_cvodes.dll", EntryPoint = "SUNDenseMatrix_Data", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    504     public unsafe static extern double* SUNDenseMatrix_Data(IntPtr matrix);
    505 
    506     [DllImport("sundials_cvodes.dll", EntryPoint = "SUNDenseMatrix_Cols", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    507     public static extern long SUNDenseMatrix_Cols(IntPtr matrix);
    508 
    509     [DllImport("sundials_cvodes.dll", EntryPoint = "SUNDenseMatrix_Rows", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    510     public static extern long SUNDenseMatrix_Rows(IntPtr matrix);
    511 
    512 
    513     public unsafe static double SUNDenseMatrix_Get(IntPtr mat, long i, long j) {
    514       long M = SUNDenseMatrix_Rows(mat);
    515       // the(i, j)th element of A(with 0 <= i<M and 0 <= j<N) is given by(A->data)[j*M+i]
    516       return SUNDenseMatrix_Data(mat)[j*M+i];
    517     }
    518 
    519     public unsafe static void SUNDenseMatrix_Set(IntPtr mat, long i, long j, double val) {
    520       long M = SUNDenseMatrix_Rows(mat);
    521       // the(i, j)th element of A(with 0 <= i<M and 0 <= j<N) is given by(A->data)[j*M+i]
    522       SUNDenseMatrix_Data(mat)[j * M + i] = val;
    523     }
    524 
    525     #endregion
    526 
    527     #region linear solver
    528     [DllImport("sundials_cvodes.dll", EntryPoint = "SUNDenseLinearSolver", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    529     public static extern IntPtr SUNDenseLinearSolver(
    530       IntPtr y, // N_Vector
    531       IntPtr A // SUNMatrix
    532       );
    533 
    534     [DllImport("sundials_cvodes.dll", EntryPoint = "SUNLinSolInitialize", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    535     public static extern int SUNLinSolInitialize(IntPtr linearSolver);
    536 
    537     [DllImport("sundials_cvodes.dll", EntryPoint = "SUNLinSolSetup", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    538     public static extern int SUNLinSolSetup(
    539       IntPtr linearSolver,
    540       IntPtr A // SUNMatrix
    541       );
    542 
    543     [DllImport("sundials_cvodes.dll", EntryPoint = "SUNLinSolSolve", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    544     public static extern int SUNLinSolSolve(
    545       IntPtr linearSolver,
    546       IntPtr A, // SUNMatrix
    547       IntPtr x, // N_Vector
    548       IntPtr b, // N_Vector
    549       double tol
    550       );
    551 
    552     [DllImport("sundials_cvodes.dll", EntryPoint = "SUNLinSolFree", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    553     public static extern int SUNLinSolFree(IntPtr linearSolver);
    554 
    555     #endregion
    556 
    557     #region N_Vector
    558     [DllImport("sundials_cvodes.dll", EntryPoint = "N_VNew_Serial", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    559     public static extern IntPtr N_VNew_Serial(long vec_length);
    560 
    561     [DllImport("sundials_cvodes.dll", EntryPoint = "N_VDestroy_Serial", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    562     public static extern void N_VDestroy_Serial(IntPtr vec);
    563 
    564     [DllImport("sundials_cvodes.dll", EntryPoint = "N_VPrint_Serial", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    565     public static extern void N_VPrint_Serial(IntPtr vec);
    566 
    567     [DllImport("sundials_cvodes.dll", EntryPoint = "N_VConst_Serial", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    568     public static extern void N_VConst_Serial(double c, IntPtr vec);
    569 
    570 
    571     [DllImport("sundials_cvodes.dll", EntryPoint = "N_VL1Norm_Serial", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    572     public static extern double N_VL1Norm_Serial(IntPtr vec);
    573 
    574     [DllImport("sundials_cvodes.dll", EntryPoint = "N_VMake_Serial", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    575     public static extern IntPtr N_VMake_Serial(long vec_length, double[] v_data);
    576 
    577     [DllImport("sundials_cvodes.dll", EntryPoint = "N_VScale", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    578     ///  Performs the operation z = c*x
    579     public static extern void N_VScale(double s,
    580       IntPtr x, // N_Vector
    581       IntPtr z // N_Vector
    582       );
    583 
    584     [DllImport("sundials_cvodes.dll", EntryPoint = "N_VMake_Serial", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    585     public unsafe static extern double* N_VGetArrayPointer_Serial(IntPtr vec);
    586 
    587     [DllImport("sundials_cvodes.dll", EntryPoint = "N_VCloneVectorArray_Serial", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
    588     public static extern IntPtr N_VCloneVectorArray_Serial(int count, IntPtr vec); // returns N_Vector* !
    589 
    590 
    591     /*
    592 #define NV_CONTENT_S(v)  ( (N_VectorContent_Serial)(v->content) )
    593 
    594 #define NV_LENGTH_S(v)   ( NV_CONTENT_S(v)->length )
    595 
    596 #define NV_OWN_DATA_S(v) ( NV_CONTENT_S(v)->own_data )
    597 
    598 #define NV_DATA_S(v)     ( NV_CONTENT_S(v)->data )
    599 
    600 #define NV_Ith_S(v,i)    ( NV_DATA_S(v)[i] )
    601 */
    602     // methods for macros
    603     public unsafe static int* NV_CONTENT_S(IntPtr v) {
    604       int* content = (int*)*(int*)v.ToPointer();
    605       return content;
    606     }
    607 
    608     public unsafe static long NV_LENGTH_S(IntPtr v) {
    609       long length = *NV_CONTENT_S(v);
    610       return length;
    611     }
    612     public unsafe static bool NV_OWN_DATA_S(IntPtr v) {
    613       var content = NV_CONTENT_S(v);
    614       int own_data = *(content + 2);
    615       return own_data > 0;
    616     }
    617     public unsafe static double* NV_DATA_S(IntPtr v) {
    618       var content = NV_CONTENT_S(v);
    619       double* data = (double*)*(content + 3);
    620       return data;
    621     }
    622     public unsafe static double NV_Get_Ith_S(IntPtr v, long i) {
    623       return NV_DATA_S(v)[i];
    624     }
    625     public unsafe static void NV_Set_Ith_S(IntPtr v, long i, double val) {
    626       NV_DATA_S(v)[i] = val;
    627     }
    628     #endregion
    629 
    630133
    631134
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