le_clock.h File Reference

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Data Structures
struct	le_clk_Time_t

Macros
String Formats
Pre-defined formats for converting time to string format. These pre-defined formats use the conversion specifiers from strftime().
#define	LE_CLK_STRING_FORMAT_DATE_TIME   "%c"
	Preferred date and time format for current locale, e.g. "Mon Jan 21 13:37:05 2013".
#define	LE_CLK_STRING_FORMAT_DATE   "%x"
	Preferred date format for current locale, e.g. "01/21/13".
#define	LE_CLK_STRING_FORMAT_TIME   "%X"
	Preferred time format for current locale, e.g. "13:37:05".

Functions
le_clk_Time_t	le_clk_GetRelativeTime (void)
le_clk_Time_t	le_clk_GetAbsoluteTime (void)
le_clk_Time_t	le_clk_Add (le_clk_Time_t timeA, le_clk_Time_t timeB)
bool	le_clk_GreaterThan (le_clk_Time_t timeA, le_clk_Time_t timeB)
le_clk_Time_t	le_clk_Sub (le_clk_Time_t timeA, le_clk_Time_t timeB)
le_clk_Time_t	le_clk_Multiply (le_clk_Time_t timeA, int scaleFactor)
le_result_t	le_clk_GetUTCDateTimeString (const char *formatSpecStrPtr, char *destStrPtr, size_t destSize, size_t *numBytesPtr)
le_result_t	le_clk_GetLocalDateTimeString (const char *formatSpecStrPtr, char *destStrPtr, size_t destSize, size_t *numBytesPtr)
le_result_t	le_clk_ConvertToUTCString (le_clk_Time_t time, const char *formatSpecStrPtr, char *destStrPtr, size_t destSize, size_t *numBytesPtr)
le_result_t	le_clk_ConvertToLocalTimeString (le_clk_Time_t time, const char *formatSpecStrPtr, char *destStrPtr, size_t destSize, size_t *numBytesPtr)

Detailed Description

Legato System Clock API include file.

Copyright (C) Sierra Wireless Inc. Use of this work is subject to license.

Function Documentation

le_clk_Time_t le_clk_Add	(	le_clk_Time_t	timeA,
		le_clk_Time_t	timeB
	)

Add two time values together, and return the result.

Returns

Sum of the two time values

le_result_t le_clk_ConvertToLocalTimeString	(	le_clk_Time_t	time,
		const char *	formatSpecStrPtr,
		char *	destStrPtr,
		size_t	destSize,
		size_t *	numBytesPtr
	)

Generate a printable string representation of a given absolute date/time value as a local time (with timezone offset applied).

The formatted date/time string, including NULL-terminator, will be copied to the destination buffer, provided it fits, and the number of bytes copied (not including the NULL-terminator) will be returned in numBytesPtr.

If the formatted date/time string does not fit in the destination buffer, then the contents of the destination buffer are undefined, and the value returned in numBytesPtr is zero.

Returns

• LE_OK if the formatted string was copied to destStrPtr
• LE_OVERFLOW if the formatted string would not fit in destStrPtr

Parameters

[in]	time	date/time to convert
[in]	formatSpecStrPtr	Format specifier string, using conversion specifiers defined for strftime().
[out]	destStrPtr	Destination for the formatted date/time string
[in]	destSize	Size of the destination buffer in bytes.
[out]	numBytesPtr	Number of bytes copied, not including NULL-terminator. Parameter can be set to NULL if the number of bytes copied is not needed.

le_result_t le_clk_ConvertToUTCString	(	le_clk_Time_t	time,
		const char *	formatSpecStrPtr,
		char *	destStrPtr,
		size_t	destSize,
		size_t *	numBytesPtr
	)

Generate a printable string representation of a given absolute date/time value as UTC time (no timezone offset applied).

The formatted date/time string, including NULL-terminator, will be copied to the destination buffer, provided it fits, and the number of bytes copied (not including the NULL-terminator) will be returned in numBytesPtr.

If the formatted date/time string does not fit in the destination buffer, the contents of the destination buffer will be undefined and the value returned in numBytesPtr will be zero.

Returns

• LE_OK if the formatted string was copied to destStrPtr
• LE_OVERFLOW if the formatted string would not fit in destStrPtr

Parameters

[in]	time	date/time to convert
[in]	formatSpecStrPtr	Format specifier string, using conversion specifiers defined for strftime().
[out]	destStrPtr	Destination for the formatted date/time string
[in]	destSize	Size of the destination buffer in bytes.
[out]	numBytesPtr	Number of bytes copied, not including NULL-terminator. Parameter can be set to NULL if the number of bytes copied is not needed.

le_clk_Time_t le_clk_GetAbsoluteTime

(

void

)

Get absolute time since the Epoch, 1970-01-01 00:00:00 +0000 (UTC).

Returns

Absolute time in seconds/microseconds

Note

Absolute time includes any time that the processor is suspended.

le_result_t le_clk_GetLocalDateTimeString	(	const char *	formatSpecStrPtr,
		char *	destStrPtr,
		size_t	destSize,
		size_t *	numBytesPtr
	)

Get the Local date/time as a formatted string.

The formatted date/time string, including NULL-terminator, will be copied to the destination buffer, provided it fits, and the number of bytes copied (not including the NULL-terminator) will be returned in numBytesPtr.

If the formatted date/time string does not fit in the destination buffer, then the contents of the destination buffer will be undefined, and the value returned in numBytesPtr will be zero.

Returns

• LE_OK if the formatted string was copied to destStrPtr.
• LE_OVERFLOW if the formatted string would not fit in destStrPtr.

Parameters

[in]	formatSpecStrPtr	Format specifier string, using conversion specifiers defined for strftime().
[out]	destStrPtr	Destination for the formatted date/time string
[in]	destSize	Size of the destination buffer in bytes.
[out]	numBytesPtr	Number of bytes copied, not including NULL-terminator. Parameter can be set to NULL if the number of bytes copied is not needed.

le_clk_Time_t le_clk_GetRelativeTime

(

void

)

Get relative time since a fixed but unspecified starting point.

Returns

Relative time in seconds/microseconds

Note

Relative time includes any time that the processor is suspended.

le_result_t le_clk_GetUTCDateTimeString	(	const char *	formatSpecStrPtr,
		char *	destStrPtr,
		size_t	destSize,
		size_t *	numBytesPtr
	)

Get the UTC date/time as a formatted string.

The formatted date/time string, including NULL-terminator, will be copied to the destination buffer, provided it fits, and the number of bytes copied (not including the NULL-terminator) will be returned in numBytesPtr.

If the formatted date/time string does not fit in the destination buffer, the contents of the destination buffer will be undefined and the value returned in numBytesPtr will be zero.

Returns

• LE_OK if the formatted string was copied to destStrPtr
• LE_OVERFLOW if the formatted string would not fit in destStrPtr

Parameters

[in]	formatSpecStrPtr	Format specifier string, using conversion specifiers defined for strftime().
[out]	destStrPtr	Destination for the formatted date/time string
[in]	destSize	Size of the destination buffer in bytes.
[out]	numBytesPtr	Number of bytes copied, not including NULL-terminator. Parameter can be set to NULL if the number of bytes copied is not needed.

bool le_clk_GreaterThan	(	le_clk_Time_t	timeA,
		le_clk_Time_t	timeB
	)

Compare two time values.

Returns

• TRUE if TimeA > TimeB
• FALSE otherwise

le_clk_Time_t le_clk_Multiply	(	le_clk_Time_t	timeA,
		int	scaleFactor
	)

Multiply the time by a scale factor, and return the result

Returns

Time multiplied by scale factor

le_clk_Time_t le_clk_Sub	(	le_clk_Time_t	timeA,
		le_clk_Time_t	timeB
	)

Subtract two time values, and return the result.

Returns

Result of (timeA - timeB)