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...

Macros
#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. More...
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. More...
enum	hnb_coord_enum { HNB_BARY, HNB_BODY, HNB_JACOBI, HNB_BAD_COORD }
	Output file coordinate systems. More...
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. More...
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. More...
DLLSPEC void	hnb_read_option_array (hnb_options_t *opts, const char *array[], FILE *logfile)
	Parses an HNBody option string array. More...
DLLSPEC void	hnb_read_option_file (hnb_options_t *opts, const char *file, FILE *logfile)
	Parses an HNBody input file. More...
DLLSPEC void	hnb_exec (hnb_data_t *sys, const hnb_options_t *opts, FILE *logfile, const char *save)
	Executes a pre-initialized integration. More...
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. More...
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. More...
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. More...
DLLSPEC hnb_data_t *	hnb_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. More...

Detailed Description

Id

opts.h,v 1.18 2011/06/14 15:56:47 rauch Exp

Author

Kevin P. Rauch

Typedef Documentation

typedef enum hnb_format_enum hnb_format_t

Warning

Numerical values are fixed by the file type spec—do not change!

Enumeration Type Documentation

enum hnb_class_enum

Enumerator
HNB_SAVE	Save file.
HNB_ENERGY	Energy file.
HNB_OUTPUT	Output file.
HNB_STATE	State file.
HNB_BAD_CLASS	Explicit invalid value.

enum hnb_coord_enum

Enumerator
HNB_BARY	Barycentric reference frame.
HNB_BODY	Bodycentric reference frame.
HNB_JACOBI	Jacobi (hierarchical barycentric) reference frame.
HNB_BAD_COORD	Explicit invalid value.

enum hnb_format_enum

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_SMARTFLOAT.

Referenced by hnb_benchmark(), 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.

Referenced by hnb_argv_driver(), and hnb_benchmark().

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_user_exam_func, 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_ORDER_MAX, and hnb_raw_init().

Referenced by hnb_benchmark(), and hnb_opts_driver().

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.

Referenced by hnb_benchmark().

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.

Referenced by hnb_interface().