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143 lines
4.1 KiB
C
143 lines
4.1 KiB
C
/**
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* Various utility functions for use by applications
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*
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* Copyright (C) 2015 Tommy Vestermark
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef INCLUDE_R_UTIL_H_
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#define INCLUDE_R_UTIL_H_
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#include <stdint.h>
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#include <stdbool.h>
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#include <time.h>
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#include "compat_time.h"
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#if defined _MSC_VER // Microsoft Visual Studio
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// MSC has something like C99 restrict as __restrict
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#ifndef restrict
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#define restrict __restrict
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#endif
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#endif
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// buffer to hold localized timestamp "YYYY-MM-DD HH:MM:SS.000000"
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#define LOCAL_TIME_BUFLEN 32
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/// Get current time with usec precision.
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///
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/// @param tv: output for current time
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void get_time_now(struct timeval *tv);
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/// Printable timestamp in local time
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///
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/// @param time_secs: 0 for now, or seconds since the epoch
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/// @param buf: output buffer, long enough for "YYYY-MM-DD HH:MM:SS"
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/// @return buf pointer (for short hand use as operator)
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char* local_time_str(time_t time_secs, char *buf);
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/// Printable timestamp in local time with microseconds.
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///
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/// @param tv: NULL for now, or seconds and microseconds since the epoch
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/// @param buf: output buffer, long enough for "YYYY-MM-DD HH:MM:SS"
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/// @return buf pointer (for short hand use as operator)
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char *usecs_time_str(struct timeval *tv, char *buf);
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/// Printable sample position
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///
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/// @param sample_pos sample position
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/// @param buf: output buffer, long enough for "@0.000000s"
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/// @return buf pointer (for short hand use as operator)
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char *sample_pos_str(float sample_file_pos, char *buf);
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/// Convert Celsius to Fahrenheit
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///
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/// @param celsius: temperature in Celsius
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/// @return temperature value in Fahrenheit
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float celsius2fahrenheit(float celsius);
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/// Convert Fahrenheit to Celsius
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///
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/// @param celsius: temperature in Fahrenheit
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/// @return temperature value in Celsius
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float fahrenheit2celsius(float fahrenheit);
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/// Convert Kilometers per hour (kph) to Miles per hour (mph)
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///
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/// @param kph: speed in Kilometers per hour
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/// @return speed in miles per hour
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float kmph2mph(float kph);
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/// Convert Miles per hour (mph) to Kilometers per hour (kmph)
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///
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/// @param mph: speed in Kilometers per hour
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/// @return speed in kilometers per hour
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float mph2kmph(float kph);
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/// Convert millimeters (mm) to inches (inch)
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///
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/// @param mm: measurement in millimeters
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/// @return measurement in inches
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float mm2inch(float mm);
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/// Convert inches (inch) to millimeters (mm)
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///
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/// @param inch: measurement in inches
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/// @return measurement in millimeters
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float inch2mm(float inch);
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/// Convert kilo Pascal (kPa) to pounds per square inch (PSI)
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///
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/// @param kpa: pressure in kPa
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/// @return pressure in PSI
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float kpa2psi(float kpa);
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/// Convert pounds per square inch (PSI) to kilo Pascal (kPa)
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///
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/// @param psi: pressure in PSI
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/// @return pressure in kPa
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float psi2kpa(float psi);
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/// Convert hecto Pascal (hPa) to inches of mercury (inHg)
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///
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/// @param kpa: pressure in kPa
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/// @return pressure in inHg
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float hpa2inhg(float hpa);
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/// Convert inches of mercury (inHg) to hecto Pascal (hPa)
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///
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/// @param kpa: pressure in inHg
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/// @return pressure in hPa
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float inhg2hpa(float inhg);
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/// Return true if the string ends with the specified suffix, otherwise return false.
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///
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/// @param str: string to search for patterns
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/// @param suffix: the pattern to search
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/// @return true if the string ends with the specified suffix, false otherwise.
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bool str_endswith(const char *restrict str, const char *restrict suffix);
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/// Replace a pattern in a string. This utility function is
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/// useful when converting native units to si or customary.
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///
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/// @param orig: string to search for patterns
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/// @param rep: the pattern to replace
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/// @param with: the replacement pattern
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/// @return a new string that has rep replaced with with
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char *str_replace(char *orig, char *rep, char *with);
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/// Make a nice printable string for a frequency.
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///
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/// @param freq: the frequency to convert to a string.
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const char *nice_freq (double freq);
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#endif /* INCLUDE_R_UTIL_H_ */
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