strlib.c File Reference

Functions for parsing c strings. More...

#include "strlib.h"
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>

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Functions
uint8_t	parse_influxdb (char *value, char *packet, char *name)
	Searches InfluxDB json packet, "packet", for "name" and writes the associated value to "value" as a char array. This is ported from packet_get_value() from packet.c in kLabUM/IoT. More...
uint8_t	strparse_influxdb (char *param, char *packet, char *name)
	Searches InfluxDB json-packet, "packet" for "name" and stores the associated value as a string in "param". Removes the quotations that wrap the strings returned in the query. More...
uint8_t	intparse_influxdb (int *param, char *packet, char *name)
	Searches InfluxDB json-packet, "packet" for "name" and stores the associated value as an int in "param". Removes the quotations that wrap the strings returned in the query. More...
uint8_t	clear_str (char *str)
	Resets a string to null bytes. More...
void	zips (char *begin[], char *end[],...)
	Variadic function that zips c strings. More...
void	zipf (float begin[], float end[],...)
	Variadic function that zips floats. More...
char *	strextract (const char input_str[], char output_str[], const char search_start[], const char search_end[])
	Searches for the left-most c string in between search_start and search_end and stores it in output_str. More...
void	for_each (void *begin, void *end, size_t sz, void(*fn)(void *a))
	Applies a function over a range of values;. More...
uint8_t	gps_parse (const char *gps_string, float *lat, float *lon, float *hdop, float *altitude, uint8_t *gps_fix, float *cog, float *spkm, float *spkn, uint8_t *nsat)
	Parses the given gps string into the given buffers. More...
uint8_t	parse_http_status (char *http_status, char *version, char *status_code, char *phrase)
	Searches a string "http_status" and attempts to parse the status line. Stores the results in "version", "status_code", and "phrase". More...

Detailed Description

Functions for parsing c strings.

Author

Brandon Wong, Ivan Mondragon

Version

TODO

Date

2017-06-19

Function Documentation

uint8_t clear_str

(

char *

str

)

Resets a string to null bytes.

Parameters

str	String to reset

Returns

1u on success, 0u otherwise

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void for_each	(	void *	begin,
		void *	end,
		size_t	sz,
		void(*)(void *a)	fn
	)

Applies a function over a range of values;.

Parameters

begin[]	Pointer to beginning of range.
end[]	Pointer to one past the end of the range.
sz	Size of each element in bytes.
fn	function which transforms each value.

uint8_t gps_parse	(	const char *	gps_string,
		float *	lat,
		float *	lon,
		float *	hdop,
		float *	altitude,
		uint8_t *	gps_fix,
		float *	cog,
		float *	spkm,
		float *	spkn,
		uint8_t *	nsat
	)

Parses the given gps string into the given buffers.

Parameters

gps_string	The string to be parsed
lat	Buffer to store the Latitude.
lon	Buffer to store the Longitude.
hdop	Buffer to store the Horizontal Diluition of Precision.
altitude	Buffer to store the Altitude: mean-sea-level (geoid).
gps_fix	Buffer to store the flag: 0 = Invalid Fix 2 = 2D fix 3 = 3D fix
cog	Buffer to store the Course over ground.
spkm	Buffer to store the Speed over ground (km/hr).
spkn	Buffer to store the Speed over ground (knots).
nsat	Buffer to store the number of satellites in use [0..12]

Returns

1u on successful parsing, 0u otherwise.

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uint8_t intparse_influxdb	(	int *	param,
		char *	packet,
		char *	name
	)

Searches InfluxDB json-packet, "packet" for "name" and stores the associated value as an int in "param". Removes the quotations that wrap the strings returned in the query.

Parameters

param	Parameter to be written to
packet	Packet to search
name	Substring to search for in packet

Returns

1u on success, 0u otherwise

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uint8_t parse_http_status	(	char *	http_status,
		char *	version,
		char *	status_code,
		char *	phrase
	)

Searches a string "http_status" and attempts to parse the status line. Stores the results in "version", "status_code", and "phrase".

Parameters

http_status	String to be parsed. Expects Status-Line protocol.
version	Buffer to store the version.
status_code	Buffer to store the status code.
phrase	Buffer to store the phrase.

Returns

1u on success, 0u otherwise.

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uint8_t parse_influxdb	(	char *	value,
		char *	packet,
		char *	name
	)

Searches InfluxDB json packet, "packet", for "name" and writes the associated value to "value" as a char array. This is ported from packet_get_value() from packet.c in kLabUM/IoT.

Parameters

value	Value to be written to
packet	Packet to search
name	Substring to search for in packet

Returns

1u on success, 0u otherwise

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char* strextract	(	const char	input_str[],
		char	output_str[],
		const char	search_start[],
		const char	search_end[]
	)

Searches for the left-most c string in between search_start and search_end and stores it in output_str.

Parameters

input_str[]	C string to be searched
output_str[]	Buffer to store the resulting c string
search_start[]	Leading c string in the query
search_end[]	Ending c string in the query

Returns

Pointer to first occurance of search_end after search_start or NULL if extraction fails.

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uint8_t strparse_influxdb	(	char *	param,
		char *	packet,
		char *	name
	)

Searches InfluxDB json-packet, "packet" for "name" and stores the associated value as a string in "param". Removes the quotations that wrap the strings returned in the query.

Parameters

param	Parameter to be written to
packet	Packet to search
name	Substring to search for in packet

Returns

1u on success, 0u otherwise

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void zipf	(	float	begin[],
		float	end[],
			...
	)

Variadic function that zips floats.

Parameters

begin	Buffer to store the floats.
end	Pointer to one past the end of the buffer.
...	Variadic number of floats.

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void zips	(	char *	begin[],
		char *	end[],
			...
	)

Variadic function that zips c strings.

Parameters

begin	Buffer to store the c strings.
end	Pointer to one past the end of the buffer.
...	Variadic number of c strings.

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