hnbody/opts.h File Reference

Enumerations and functions related to HNBody input and output files. More...

#include "hnbody/kernel.h"
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Data Structures

struct  hnb_option_struct
 Option values data structure. More...
struct  hnb_cli_struct
 HNBody Command Line Interface options. More...

Defines

#define HNB_ORDER_MAX   32
 Maximum number of columns allowed in InputOrder, OutputOrder, etc.

Typedefs

typedef enum hnb_class_enum hnb_class_t
 Output file classes.
typedef enum hnb_format_enum hnb_format_t
 Output file formats.
typedef enum hnb_coord_enum hnb_coord_t
 Output file coordinate systems.
typedef enum hnb_option_enum hnb_option_tag
 Input (a.k.a. option) file tags.
typedef struct hnb_option_struct hnb_options_t
 Option values data structure.
typedef struct hnb_cli_struct hnb_cli_t
 HNBody Command Line Interface options.

Enumerations

enum  hnb_class_enum {
  HNB_SAVE, HNB_ENERGY, HNB_OUTPUT, HNB_STATE,
  HNB_BAD_CLASS
}
 

Output file classes.

More...
enum  hnb_format_enum {
  HNB_TEXT = 0, HNB_FLOAT = 1, HNB_DOUBLE = 2, HNB_SMARTFLOAT = 3,
  HNB_BAD_FORMAT
}
 

Output file formats.

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enum  hnb_coord_enum { HNB_BARY, HNB_BODY, HNB_JACOBI, HNB_BAD_COORD }
 

Output file coordinate systems.

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enum  hnb_option_enum {
  val_true, val_yes, val_false, val_no,
  name_integ, val_symp, val_BS, val_RK,
  name_integcoord, name_coordzwp, val_jac, val_regular,
  val_baryc, val_bodyc, val_modified, val_kd,
  val_dk, val_sd, name_corr, val_O2,
  val_O4, val_O6, val_rev, name_tiptoe,
  name_enc, name_prune, name_thread, name_thrtiming,
  name_dzH, name_dzZ, name_M, name_dM,
  name_N, name_nH, name_nL, name_nZ,
  val_auto, name_aunit, val_deg, val_rad,
  name_munit, val_g, val_Msun, name_lunit,
  val_m, val_AU, val_ua, val_pc,
  name_tunit, val_s, val_h, val_d,
  val_yr, name_incoord, name_iorder, val_mass,
  val_rcapt, val_renc, val_semi, val_peridist,
  val_ecc, val_incl, val_longasc, val_longperi,
  val_argperi, val_meanlong, val_truelong, val_meanlati,
  val_truelati, val_meananom, val_trueanom, val_time,
  val_epoch, val_timeperi, val_x1, val_x2,
  val_x3, val_v1, val_v2, val_v3,
  val_idtag, val_jindex, name_J2, name_J4,
  name_J6, name_obRadius, name_postn, name_ptype,
  name_ltype, val_hwps, val_lwps, val_zwps,
  name_hwp, name_lwp, name_zwp, name_fixhwp,
  name_tinit, name_tfinal, name_outfile, name_outhead,
  name_outint, name_outcoord, name_outdig, name_outdata,
  name_outtype, name_outorder, name_stfile, name_sthead,
  name_stint, name_stcoord, name_stdig, name_stdata,
  name_sttype, name_storder, name_savfile, name_savint,
  name_savlimit, name_ergfile, name_erghead, name_ergint,
  name_ergdata, val_steps, val_double, val_float,
  val_smart, val_text, name_infile, name_include,
  NOPTAGS, MULTITAGS, FLOATVAL
}
 

Input (a.k.a. option) file tags.


Functions

DLLSPEC void hnb_blank_cli (hnb_cli_t *cli)
 Clears command line interface options.
DLLSPEC void hnb_blank_options (hnb_options_t *opts)
DLLSPEC void hnb_fill_options (hnb_options_t *opts)
DLLSPEC void hnb_free_options (hnb_options_t *opts)
 Frees allocated options memory.
DLLSPEC void hnb_read_option_array (hnb_options_t *opts, const char *array[], FILE *logfile)
 Parses an HNBody option string array.
DLLSPEC void hnb_read_option_file (hnb_options_t *opts, const char *file, FILE *logfile)
 Parses an HNBody input file.
DLLSPEC void hnb_exec (hnb_data_t *sys, const hnb_options_t *opts, FILE *logfile, const char *save)
 Executes a pre-initialized integration.
DLLSPEC int hnb_interface (hnb_options_t *opts, hnb_cli_t *cli, int argc, char *argv[], void(*custom)(FILE *f, const char *prefix))
 Parses the standard HNBody driver command line interface.
DLLSPEC int hnb_opts_driver (hnb_options_t *opts, const hnb_cli_t *cli, hnb_extra_t kick, hnb_extra_t shift, hnb_drift_t drift, hnb_derivs_t derivs, hnb_energy_t energy)
 Performs an integration given a complete set of defining options.
DLLSPEC double hnb_benchmark (const hnb_options_t *opts, hnb_extra_t kick, hnb_extra_t shift, hnb_drift_t drift, hnb_derivs_t derivs, double maxcpu)
 Estimates CPU time per step of an integration.
DLLSPEC hnb_data_thnb_opts_init (hnb_options_t *opts, hnb_extra_t ekick, hnb_extra_t eshift, hnb_drift_t edrift, hnb_derivs_t ederivs, hnb_energy_t energy)
 Initializes an HNBody integration.

Detailed Description

Id
opts.h,v 1.18 2011/06/14 15:56:47 rauch Exp
Author:
Kevin P. Rauch

Typedef Documentation

Warning:
Numerical values are fixed by the file type spec---do not change!

Enumeration Type Documentation

Enumerator:
HNB_SAVE 

Save file.

HNB_ENERGY 

Energy file.

HNB_OUTPUT 

Output file.

HNB_STATE 

State file.

HNB_BAD_CLASS 

Explicit invalid value.

Enumerator:
HNB_BARY 

Barycentric reference frame.

HNB_BODY 

Bodycentric reference frame.

HNB_JACOBI 

Jacobi (hierarchical barycentric) reference frame.

HNB_BAD_COORD 

Explicit invalid value.

Warning:
Numerical values are fixed by the file type spec---do not change!
Enumerator:
HNB_TEXT 

Text (ASCII) format.

HNB_FLOAT 

Single precision format.

HNB_DOUBLE 

Double precision format.

HNB_SMARTFLOAT 

Optimized single precision format.

HNB_BAD_FORMAT 

Explicit invalid value.


Function Documentation

DLLSPEC double hnb_benchmark ( const hnb_options_t opts,
hnb_extra_t  kick,
hnb_extra_t  shift,
hnb_drift_t  drift,
hnb_derivs_t  derivs,
double  maxcpu 
)

This routine determines the average CPU time per step of an integration. The number of steps integrated is systematically increased until of order tcpu seconds of CPU time have been used. If no options are supplied a standard test problem is integrated. All output is disabled during benchmarking; if output is frequent, the returned value may significantly underestimate the actual time per step. Results may also be inaccurate if the CPU time for a complete integration (Tinitial to Tfinal) is of order the resolution of the system clock.

Parameters:
opts is the (filled) options structure specifying the integration; if NULL, a standardized (HNBmark) integration is benchmarked.
kick is an optional extra_kick() term to include in the integration; use NULL if none (Symplectic only).
shift is an optional extra_shift() term to include in the integratio; use NULL if none (Symplectic only).
drift is an optional extra_drift() term to include in the integratio; use NULL if none (Symplectic only).
derivs is an optional extra_derivs() term to include in the integration; use NULL if none (ODE only).
maxcpu is the desired CPU time (in seconds) to expend during the benchmark.
Returns:
the CPU time per step (in seconds), or -1 if benchmarking failed for any reason.

References hnb_exec(), hnb_free_options(), hnb_opts_init(), and hnb_read_option_array().

Referenced by hnb_interface(), and hnb_opts_driver().

DLLSPEC void hnb_blank_cli ( hnb_cli_t cli  ) 

This routine initializes a command line interface structure with its default values. It is assumed that all members are prepared to be overwritten---in particular, no attempt is made to close file pointers or free dynamic memory (it has no way of determining whether such actions are appropriate).

References hnb_cli_struct::bench, hnb_cli_struct::help, hnb_cli_struct::log, hnb_cli_struct::logfile, hnb_cli_struct::quiet, hnb_cli_struct::recfile, hnb_cli_struct::savefile, hnb_cli_struct::tcpu, and hnb_cli_struct::version.

Referenced by hnb_interface().

DLLSPEC void hnb_exec ( hnb_data_t sys,
const hnb_options_t opts,
FILE *  log,
const char *  save 
)

This routine takes a pre-initialized system and a set of (output) options, and performs the integration. If log is non-NULL, it is an open file descriptor to use for ancillary output. If save is non-NULL, it is the name of an HNBody Save file to be used in restarting the integration; Energy and Output files are trimmed to their length when the save file was written.

References hnb_exec(), and HNB_SMARTFLOAT.

Referenced by hnb_benchmark(), hnb_exec(), and hnb_opts_driver().

DLLSPEC void hnb_free_options ( hnb_options_t opts  ) 

This routine frees any dynamically allocated memory inside the options structure (it does not assume that opts itself was dynamically allocated---if so it must be freed separately).

Warning:
All pointer types are assumed to be independent blocks of heap. This is true for structures filled by standard HNBody API calls; beware if you have filled it manually!
Parameters:
opts is the options structure whose contents is to be freed.

References hnb_free_options().

Referenced by hnb_argv_driver(), hnb_benchmark(), and hnb_free_options().

DLLSPEC int hnb_interface ( hnb_options_t opts,
hnb_cli_t cli,
int  argc,
char *  argv[],
void(*)(FILE *f, const char *prefix)  custom 
)

This routine parses the standard HNBody command line options, reads and digests the specified HNBody input files, and saves the results in opts and cli. The output can be fed directly to hnb_driver(). Actionable (the -h, -m and -v flags) or invalid command line options result in return of a blank opts structure.

Parameters:
opts is the options structure to initialize (blank) and fill in.
cli is the command line structure to initialize and fill in.
argc is the number of command line arguments supplied.
argv is the array of option strings; argv[0] should contain the name of the driver.
custom is an optional custom driver version/information writer whose output is prepended to help messages and log files; use NULL if none.
Returns:
0 (opts filled) or 1 (opts blank) on success, else -1 (opts blank) on any error.
Warning:
The contents of cli and opts will be completely overwritten; avoiding memory leaks etc. is the responsibility of the caller.
See also:
hnb_argv_driver(), hnb_opts_driver()

References hnb_cli_struct::bench, hnb_cli_struct::help, hnb_benchmark(), hnb_blank_cli(), hnb_read_option_file(), hnb_cli_struct::log, hnb_cli_struct::logfile, hnb_cli_struct::quiet, hnb_cli_struct::recfile, hnb_cli_struct::savefile, hnb_cli_struct::tcpu, and hnb_cli_struct::version.

Referenced by hnb_argv_driver().

DLLSPEC int hnb_opts_driver ( hnb_options_t opts,
const hnb_cli_t cli,
hnb_extra_t  kick,
hnb_extra_t  shift,
hnb_drift_t  drift,
hnb_derivs_t  derivs,
hnb_energy_t  energy 
)

This routine sets up and then executes an integration defined by the supplied options and command line arguments.

Parameters:
opts is the (filled) options structure defining the integration.
cli contains the command line interface values for the integration.
kick is an optional extra_kick() term to include in the integration; use NULL if none (Symplectic only).
shift is an optional extra_shift() term to include in the integration; use NULL if none (Symplectic only).
drift is an optional extra_drift() term to include in the integration; use NULL if none (Symplectic only).
derivs is an optional extra_derivs() term to include in the integration; use NULL if none (ODE only).
energy is an optional extra_energy() term to include in the integration; use NULL if none.
Returns:
EXIT_SUCCESS on success, else EXIT_FAILURE.
Note:
opts can be modified during initialization, and should be reused only to repeat the same integration, possibly with trivial changes. At present only changing Tfinal is considered "trivial".
See also:
hnb_argv_driver(), hnb_interface()

References hnb_benchmark(), hnb_exec(), hnb_opts_init(), hnb_cli_struct::log, hnb_cli_struct::quiet, hnb_cli_struct::recfile, hnb_cli_struct::savefile, and hnb_cli_struct::tcpu.

Referenced by hnb_argv_driver().

DLLSPEC hnb_data_t* hnb_opts_init ( hnb_options_t opts,
hnb_extra_t  kick,
hnb_extra_t  shift,
hnb_drift_t  drift,
hnb_derivs_t  derivs,
hnb_energy_t  energy 
)

This routine initializes an HNBody integration given a set of options and optional additions to the Hamiltonian; aside from initial conditions, it is assumed that all other option information has been assigned valid values.

Parameters:
opts is the (filled) options structure specifying the integration.
kick is an optional extra_kick() term to include in the integration; use NULL if none (Symplectic only).
shift is an optional extra_shift() term to include in the integratio; use NULL if none (Symplectic only).
drift is an optional extra_drift() term to include in the integratio; use NULL if none (Symplectic only).
derivs is an optional extra_derivs() term to include in the integration; use NULL if none (ODE only).
energy is an optional extra_energy() term to include in the integration; use NULL if none.
Returns:
a valid, initialized integration structure, else NULL.

References HNB_JACOBI, hnb_opts_init(), HNB_ORDER_MAX, and hnb_raw_init().

Referenced by hnb_benchmark(), hnb_opts_driver(), and hnb_opts_init().

DLLSPEC void hnb_read_option_array ( hnb_options_t opts,
const char *  array[],
FILE *  log 
)

This routine parses the contents of an array of option strings and adds the digested content to an options structure. It can be called successively given the same structure to accumulate options spread over multiple files.

Parameters:
opts is the structure in which to accumulate options.
array is the string array to parse.
log is the (optional) stream for diagnostic output.
See also:
hnb_read_option_file

References HNB_ORDER_MAX, and hnb_read_option_array().

Referenced by hnb_benchmark(), and hnb_read_option_array().

DLLSPEC void hnb_read_option_file ( hnb_options_t opts,
const char *  file,
FILE *  log 
)

This routine parses the contents of an options file and adds the digested content to an options structure. It can be called successively given the same structure to accumulate options spread over multiple files.

Parameters:
opts is the structure in which to accumulate options.
file is the file to parse.
log is the (optional) stream for diagnostic output.
See also:
hnb_read_option_array

References HNB_ORDER_MAX, and hnb_read_option_file().

Referenced by hnb_interface(), and hnb_read_option_file().


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