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GLAST/LAT > DAQ and FSW > FSW > Doxygen Index > LDT / V0-0-0

Constituent: encdec_unit_test     Tag: linux-gcc

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encdec_unit_test.c File Reference

Tests the encode/decode library 'encdec'. More...

#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include "PBS/TMR.h"
#include "LDT/APM.h"
#include "LDT/APE.h"
#include "LDT/APD.h"
#include <math.h>

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Functions
int	ap_test (int argc, char **argv)
	Tests the Arithmetic Probability Encoding/Decoding for byte-sized tables.
int	ap_cheap_test (const char *banner, const int *freqs, int nfreqs, const unsigned char *symbols, int nsymbols, unsigned int *table)
	Does a cheap test of the Arithmetic Probability Encoding using a byte-wide table.
int	ap_cheap_test1 (void)
	Cheap test of the encode/decode of a test distribution.
int	ap_cheap_test2 (void)
	Cheap test of the encode/decode of a test distribution.
int	ap_buffer_test (void)
	Does a cheap test of the Arithmetic Probability Encoding filling a buffer, encoding it, then decoding it.
int	ap_composite_test (void)
	Composite test of byte encoder.
int	ap_file_test (const char *fileName)
	Tests the encoding/decoding of the specified file.
int	ap_self_encdec (const char *banner, const unsigned char *symbols, int nsymbols)
	Encodes, then decodes the specified set of symbols.
int	fill_buffer (unsigned char *buffer)
	Fill a buffer with a semi-nontrivial pattern.
unsigned const char *	get_contents (const char *fileName, int *rsize)
	Reads in the specified file.
void	report_results (const char *banner, int encode_bit_count, double entropy_bit_count, int original_bit_count, int decode_bit_count, TMR_tick encode_time, TMR_tick decode_time, unsigned int status)
	Standard report of the results of an encode/decode.
double	get_byte_esize (const unsigned int *freqs, int nfreqs, const unsigned char *samples, int nsamples)
	Calculates the size, in bits, of the sample distribution based on the specified frequency table.
int	main (int argc, char **argv)
	Main program, it takes no arguments.
Variables
const unsigned int	Freqs []
	Frequency distribution used in many of the tests.

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Detailed Description

Tests the encode/decode library 'encdec'.

Author:

JJRussell - russell@slac.stanford.edu

   CVS $Id: encdec_unit_test.c,v 1.1.1.1 2005/09/23 06:41:07 russell Exp $

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Function Documentation

int ap_buffer_test (  void   )  [static]

Does a cheap test of the Arithmetic Probability Encoding filling a buffer, encoding it, then decoding it. Return values: 0,if  successful 2,if  not

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int ap_cheap_test (  const char *  banner, const int *  freqs, int  nfreqs, const unsigned char *  symbols, int  nsymbols, unsigned int *  table )  [static]

Does a cheap test of the Arithmetic Probability Encoding using a byte-wide table. Return values: 0,if  successful 2,if  not Parameters: banner  The title banner freqs  The frequency distribution nfreqs  The number of entries in the frequency table symbols  The symbols to encode nsymbols  The number of symbols to encode table  Storage for the encoding table

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int ap_cheap_test1 (  void   )  [static]

Cheap test of the encode/decode of a test distribution. Return values: 0,if  successful 2,if  not

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int ap_cheap_test2 (  void   )  [static]

Cheap test of the encode/decode of a test distribution. Return values: 0,if  successful 2,if  not

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int ap_composite_test (  void   )  [static]

Composite test of byte encoder. Return values: 0  if successful 2  if failure This tests the ability to use multiple encoding tables. The encoding tables for two distributions are computed from two separate distributions. The probablity distributions are then encoding by picking a symbol first from one distribution then the other. The decoding is then done with the result being checked against the original

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int ap_file_test (  const char *  fileName  )  [static]

Tests the encoding/decoding of the specified file. Parameters: fileName  The name of the file to encode

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int ap_self_encdec (  const char *  banner, const unsigned char *  symbols, int  nsymbols )  [static]

Encodes, then decodes the specified set of symbols. Returns: Status, 0 if successful Parameters: banner  Arbitrary string to use as a title banner symbols  The set of symbols to encode/decode nsymbols  The number of symbols to encode/decode

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int ap_test (  int  argc, char **  argv )

Tests the Arithmetic Probability Encoding/Decoding for byte-sized tables. Return values: 0  if successful 2  if failure

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int fill_buffer (  unsigned char *  buffer  )  [static]

Fill a buffer with a semi-nontrivial pattern. Parameters: buffer  The buffer to fill

double get_byte_esize (  const unsigned int *  freqs, int  nfreqs, const unsigned char *  samples, int  nsamples )  [static]

Calculates the size, in bits, of the sample distribution based on the specified frequency table. Returns: The size, int bits, of the sample distribution Parameters: freqs  The frequency table nfreqs  The number of entries in the frequency table samples  The array of samples nsamples  The number of samples

const unsigned char * get_contents (  const char *  fileName, int *  rsize )  [static]

Reads in the specified file. Returns: A pointer to the file's content and, in an argument, its size in bytes Parameters: fileName  The name of the file to encode rsize  Pointer to receive the size of the file's content

int main (  int  argc, char **  argv )

Main program, it takes no arguments. Returns: 0 if successful, else bit mask of those tests that failed

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void report_results (  const char *  banner, int  encode_bit_count, double  entropy_bit_count, int  original_bit_count, int  decode_bit_count, TMR_tick  encode_time, TMR_tick  decode_time, unsigned int  status )  [static]

Standard report of the results of an encode/decode. Parameters: banner  The title banner of this test encode_bit_count  Number of bits to encode the distribution. entropy_bit_count  Number of bits predicted to encode the distribution, based on the entropy of the distribution. original_bit_count  The number of bits in the original distribution decode_bit_count  The number of decoded bits. encode_time  The time to perform the encoding decode_time  The time to perform the decoding status  The status of comparing the original and decoded distributions.

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Variable Documentation

const unsigned int Freqs

Initial value: { 1195, 190, 102, 160, 187, 64, 157, 405, 1 } Frequency distribution used in many of the tests.

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