trig_int_ops.c File Reference

Operations based on Local_Trig_Interval struct. More...

#include "libftsh.h"

Defines
#define	ENTEREXIT   0
Functions
void	evaluate_intlist (REAL *outfcn, REAL *incoef, Local_Trig_Interval *interval_list, int num_intervals)
void	expand_intlist (REAL *outcoef, REAL *infcn, Local_Trig_Interval *interval_list, int num_intervals)
void	expand_d_intlist (REAL *outcoef, REAL *infcn, Local_Trig_Interval *interval_list, int num_intervals)

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Detailed Description

Operations based on Local_Trig_Interval struct.

Summary:

• evaluate_intlist evaluate on a list of intervals (dual bell).
• expand_intlist expand on a list of intervals.
• expand_d_intlist expand on a list of intervals using dual bell.

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Function Documentation

void evaluate_intlist	(	REAL *	outfcn,
		REAL *	incoef,
		Local_Trig_Interval *	interval_list,
		int	num_intervals
	)

This routine does a LCT/DCT evaluation based on a list of intervals.

INPUTS:

• outfcn -- where to put the function constructed. We ADD onto outfcn
• incoef - the coefficients to evaluate. destroyed
• interval_list-- An array of Local_Trig_Interval's, encoding what intervals to evaluate, how to evaluate, and where to put the result
• num_intervals - the number of intervals

OUTPUTS: outfcn is filled in. incoef is destroyed

NOTES:

• evaluates using the dual bell

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void expand_d_intlist	(	REAL *	outcoef,
		REAL *	infcn,
		Local_Trig_Interval *	interval_list,
		int	num_intervals
	)

This routine does a LCT/DCT expansion on a list of intervals.

This version expands using the DUAL bell. Otherwise it is just like expand_intlist.

See expand_intlist for a full description.

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void expand_intlist	(	REAL *	outcoef,
		REAL *	infcn,
		Local_Trig_Interval *	interval_list,
		int	num_intervals
	)

This routine does a LCT/DCT expansion on a list of intervals.

INPUTS:

• outcoef -- where to put the coefficients constructed.
• infcn - the fcn to expand
• interval_list-- An array of Local_Trig_Interval's, encoding what intervals to expand, how to expand, and where to put the result -num_intervals - the number of intervals

OUTPUTS: outcoef is filled in. infcn is untouched

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