misc.h File Reference

#include <pthread.h>
#include <stdint.h>
#include <limits.h>
#include <complex.h>
#include <math.h>
#include <stdlib.h>
#include <stdbool.h>
#include <sys/errno.h>
#include <assert.h>
#include <sys/types.h>
#include <malloc.h>

Go to the source code of this file.

Classes
struct	xoshiro256ss_state

Macros
#define	_GNU_SOURCE   1
#define	VERSION()
#define	ASSERT_ZEROED(ptr, size)
#define	DEGPRA   (180./M_PI)
#define	RAPDEG   (M_PI/180.)
#define	TAI_GPS_OFFSET   (19)
#define	GPS_UTC_OFFSET   (18)
#define	TAI_UTC_OFFSET   (TAI_GPS_OFFSET+GPS_UTC_OFFSET)
#define	UNIX_EPOCH   ((time_t)315964800)
#define	BOLTZMANN   (1.380649e-23)
#define	FULL_SAMPRATE   (48000)
#define	pthread_setname(x)
#define	min(x, y)
#define	max(x, y)
#define	cisf(x)
#define	cispif(x)
#define	cis(x)
#define	cispi(x)
#define	FREE(p)

Functions
static void	ASSERT_UNLOCKED (pthread_mutex_t *mutex)
int	default_prio (void)
void	realtime (int prio)
int	norealtime (void)
void	stick_core (void)
void *	lmalloc (size_t size)
static int	init_recursive_mutex (pthread_mutex_t *m)
static double	dB2power (double x)
static double	power2dB (double x)
static double	dB2voltage (double x)
static double	voltage2dB (double x)
void	sincospi (double x, double *s, double *c)
void	sincospif (float x, float *s, float *c)
static double	sinc (double x)
int	dist_path (char *path, int path_len, const char *fname)
char *	format_gpstime (char *result, int len, int64_t t)
char *	format_gpstime_iso8601 (char *result, int len, int64_t t)
char *	format_utctime (char *result, int len, int64_t t)
char *	format_utctime_iso8601 (char *result, int len, int64_t t)
char *	ftime (char *result, int size, int64_t t)
void	normalize_time (struct timespec *x)
uint32_t	nextfastfft (uint32_t n)
ssize_t	pipefill (int, void *, size_t)
void	chomp (char *)
char *	ensure_suffix (char const *str, char const *suffix)
uint32_t	ElfHash (uint8_t const *s, size_t length)
uint32_t	ElfHashString (char const *s)
uint32_t	fnv1hash (const uint8_t *s, size_t length)
double	i0 (double const z)
double	i1 (double const z)
double	xi (double thetasq)
double	fm_snr (double r)
static int16_t	scaleclip (float const x)
static float complex	csincosf (float const x)
static float complex	csincospif (float const x)
static double complex	csincos (double const x)
static double complex	csincospi (double const x)
static float	cnrmf (float complex const x)
static double	cnrm (double complex const x)
static double	approx_magf (double complex x)
static void	time_sub (struct timespec *result, struct timespec const *a, struct timespec const *b)
static void	time_add (struct timespec *result, struct timespec const *a, struct timespec const *b)
static int	time_cmp (struct timespec const *a, struct timespec const *b)
static int64_t	ts2ns (struct timespec const *ts)
static void	ns2ts (struct timespec *ts, int64_t ns)
static time_t	utc_time_sec (void)
static time_t	gps_time_sec (void)
static int64_t	utc_time_ns (void)
int64_t	gps_time_ns (void)
void *	mirror_alloc (size_t size)
void	mirror_free (void **p, size_t size)
static void	mirror_wrap (void const **p, void const *const base, size_t const size)
size_t	round_to_page (size_t size)
uint32_t	round2 (uint32_t v)
void	drop_cache (void *mem, size_t bytes)
void	xoshiro256ss_seed (xoshiro256ss_state *st, uint64_t seed)
uint64_t	xoshiro256ss_next (xoshiro256ss_state *st)
void	xoshiro256ss_jump (xoshiro256ss_state *st)
void	rand_init (void)
double	real_gauss (void)
static double complex	complex_gauss (void)

Variables
static float const	SCALE16 = 1.f/INT16_MAX
static float const	SCALE12 = 1.f/2048.
static float const	SCALE8 = 1.f/INT8_MAX
const char *	App_path
int	Verbose
char const *	Months [12]
bool	Affinity
static int64_t const	BILLION = 1000000000LL
static int const	MILLION = 1000000
static int const	THOUSAND = 1000

Macro Definition Documentation

_GNU_SOURCE

#define _GNU_SOURCE   1

ASSERT_ZEROED

#define ASSERT_ZEROED	(		ptr,
			size )

Value:

assert(memcmp(ptr, &(typeof(*(ptr))){0}, size) == 0)

BOLTZMANN

#define BOLTZMANN   (1.380649e-23)

cis

#define cis

(

x

)

Value:

csincos(x)

cisf

#define cisf

(

x

)

Value:

csincosf(x)

cispi

#define cispi

(

x

)

Value:

csincospi(x)

cispif

#define cispif

(

x

)

Value:

csincospif(x)

DEGPRA

#define DEGPRA   (180./M_PI)

FREE

#define FREE

(

p

)

Value:

(free(p), p = NULL)

FULL_SAMPRATE

#define FULL_SAMPRATE   (48000)

GPS_UTC_OFFSET

#define GPS_UTC_OFFSET   (18)

Referenced by gps_time_sec().

max

#define max	(		x,
			y )

Value:

                ({ \
                typeof(x) _x = (x);     \
                typeof(y) _y = (y);     \
                (void) (&_x == &_y);    \
                _x > _y ? _x : _y; })

Referenced by approx_magf().

min

#define min	(		x,
			y )

Value:

                ({                      \
                typeof(x) _x = (x);     \
                typeof(y) _y = (y);     \
                (void) (&_x == &_y);    \
                _x < _y ? _x : _y; })

Referenced by approx_magf().

pthread_setname

#define pthread_setname

(

x

)

Value:

pthread_setname_np(pthread_self(),(x))

RAPDEG

#define RAPDEG   (M_PI/180.)

TAI_GPS_OFFSET

#define TAI_GPS_OFFSET   (19)

TAI_UTC_OFFSET

#define TAI_UTC_OFFSET   (TAI_GPS_OFFSET+GPS_UTC_OFFSET)

UNIX_EPOCH

#define UNIX_EPOCH   ((time_t)315964800)

Referenced by gps_time_sec().

VERSION

#define VERSION

(

)

Value:

  { fprintf(stderr,"KA9Q Multichannel SDR %s last modified %s\n",__FILE__,__TIMESTAMP__); \
  fprintf(stderr,"Copyright 2026, Phil Karn, KA9Q. May be used under the terms of the GNU Public License\n"); \
  fprintf(stderr,"   Repo: %s\n",GIT_REMOTE_URL); \
  fprintf(stderr," Commit: %s\n",GIT_HASH); \
}

Function Documentation

approx_magf()

double approx_magf ( double complex x )

inlinestatic

References max, and min.

ASSERT_UNLOCKED()

void ASSERT_UNLOCKED ( pthread_mutex_t * mutex )

inlinestatic

chomp()

void chomp

(

char *

)

cnrm()

double cnrm ( double complex const x )

inlinestatic

cnrmf()

float cnrmf ( float complex const x )

inlinestatic

complex_gauss()

double complex complex_gauss ( void )

inlinestatic

References real_gauss().

csincos()

double complex csincos ( double const x )

inlinestatic

csincosf()

float complex csincosf ( float const x )

inlinestatic

csincospi()

double complex csincospi ( double const x )

inlinestatic

References sincospi().

csincospif()

float complex csincospif ( float const x )

inlinestatic

References sincospif().

dB2power()

double dB2power ( double x )

inlinestatic

dB2voltage()

double dB2voltage ( double x )

inlinestatic

default_prio()

int default_prio

(

void

)

dist_path()

int dist_path	(	char *	path,
		int	path_len,
		const char *	fname )

drop_cache()

void drop_cache	(	void *	mem,
		size_t	bytes )

ElfHash()

uint32_t ElfHash	(	uint8_t const *	s,
		size_t	length )

ElfHashString()

uint32_t ElfHashString

(

char const *

s

)

ensure_suffix()

char * ensure_suffix	(	char const *	str,
		char const *	suffix )

fm_snr()

double fm_snr

(

double

r

)

fnv1hash()

uint32_t fnv1hash	(	const uint8_t *	s,
		size_t	length )

format_gpstime()

char * format_gpstime	(	char *	result,
		int	len,
		int64_t	t )

format_gpstime_iso8601()

char * format_gpstime_iso8601	(	char *	result,
		int	len,
		int64_t	t )

format_utctime()

char * format_utctime	(	char *	result,
		int	len,
		int64_t	t )

format_utctime_iso8601()

char * format_utctime_iso8601	(	char *	result,
		int	len,
		int64_t	t )

ftime()

char * ftime	(	char *	result,
		int	size,
		int64_t	t )

gps_time_ns()

int64_t gps_time_ns

(

void

)

gps_time_sec()

time_t gps_time_sec ( void )

inlinestatic

References GPS_UTC_OFFSET, UNIX_EPOCH, and utc_time_sec().

i0()

double i0

(

double const

z

)

i1()

double i1

(

double const

z

)

init_recursive_mutex()

int init_recursive_mutex ( pthread_mutex_t * m )

inlinestatic

lmalloc()

void * lmalloc

(

size_t

size

)

mirror_alloc()

void * mirror_alloc

(

size_t

size

)

mirror_free()

void mirror_free	(	void **	p,
		size_t	size )

mirror_wrap()

void mirror_wrap ( void const ** p, void const *const base, size_t const size )

inlinestatic

nextfastfft()

uint32_t nextfastfft

(

uint32_t

n

)

norealtime()

int norealtime

(

void

)

normalize_time()

void normalize_time

(

struct timespec *

x

)

Referenced by time_add(), and time_sub().

ns2ts()

void ns2ts ( struct timespec * ts, int64_t ns )

inlinestatic

References BILLION.

pipefill()

ssize_t pipefill	(	int	,
		void *	,
		size_t	)

power2dB()

double power2dB ( double x )

inlinestatic

rand_init()

void rand_init

(

void

)

real_gauss()

double real_gauss

(

void

)

Referenced by complex_gauss().

realtime()

void realtime

(

int

prio

)

round2()

uint32_t round2

(

uint32_t

v

)

round_to_page()

size_t round_to_page

(

size_t

size

)

scaleclip()

int16_t scaleclip ( float const x )

inlinestatic

sinc()

double sinc ( double x )

inlinestatic

sincospi()

void sincospi	(	double	x,
		double *	s,
		double *	c )

Referenced by csincospi().

sincospif()

void sincospif	(	float	x,
		float *	s,
		float *	c )

Referenced by csincospif().

stick_core()

void stick_core

(

void

)

time_add()

void time_add ( struct timespec * result, struct timespec const * a, struct timespec const * b )

inlinestatic

References normalize_time().

time_cmp()

int time_cmp ( struct timespec const * a, struct timespec const * b )

inlinestatic

time_sub()

void time_sub ( struct timespec * result, struct timespec const * a, struct timespec const * b )

inlinestatic

References normalize_time().

ts2ns()

int64_t ts2ns ( struct timespec const * ts )

inlinestatic

References BILLION.

Referenced by utc_time_ns().

utc_time_ns()

int64_t utc_time_ns ( void )

inlinestatic

References ts2ns().

utc_time_sec()

time_t utc_time_sec ( void )

inlinestatic

Referenced by gps_time_sec().

voltage2dB()

double voltage2dB ( double x )

inlinestatic

xi()

double xi

(

double

thetasq

)

xoshiro256ss_jump()

void xoshiro256ss_jump

(

xoshiro256ss_state *

st

)

xoshiro256ss_next()

uint64_t xoshiro256ss_next

(

xoshiro256ss_state *

st

)

xoshiro256ss_seed()

void xoshiro256ss_seed	(	xoshiro256ss_state *	st,
		uint64_t	seed )

Variable Documentation

Affinity

bool Affinity

extern

App_path

const char* App_path

extern

BILLION

int64_t const BILLION = 1000000000LL

static

Referenced by ns2ts(), and ts2ns().

MILLION

int const MILLION = 1000000

static

Months

char const* Months[12]

extern

SCALE12

float const SCALE12 = 1.f/2048.

static

SCALE16

float const SCALE16 = 1.f/INT16_MAX

static

SCALE8

float const SCALE8 = 1.f/INT8_MAX

static

THOUSAND

int const THOUSAND = 1000

static

Verbose

int Verbose

extern