XSI_C_LANG_SUPPORT

XSI C Language Support option group (placeholder). More...

Functions
struct tm *	getdate (const char *string)
	Convert a date-time string to broken-down time (XSI extension).
char *	strptime (const char *ZRESTRICT s, const char *ZRESTRICT format, struct tm *ZRESTRICT tm)
	Parse a date/time string according to a format (XSI extension).
void	swab (const void *ZRESTRICT src, void *ZRESTRICT dest, ssize_t nbytes)
	Swap bytes in a block of memory (XSI extension).

Variables
int	daylight
	Non-zero if Daylight Saving Time is in effect.
long	timezone
	Offset in seconds from UTC for the current timezone.

Detailed Description

XSI C Language Support option group (placeholder).

See also

https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_subprofiles.html

https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_subprofiles.html

Function Documentation

getdate()

struct tm * getdate

(

const char *

string

)

Convert a date-time string to broken-down time (XSI extension).

Parameters

string

Date-time string; the format is determined by the DATEMSK environment variable.

Returns

Pointer to a broken-down time, or NULL on failure.

strptime()

char * strptime	(	const char *ZRESTRICT	s,
		const char *ZRESTRICT	format,
		struct tm *ZRESTRICT	tm
	)

Parse a date/time string according to a format (XSI extension).

Parameters

s	Input string to parse.
format	Format string describing the date/time fields to parse.
tm	Output: filled-in broken-down time structure.

Returns

Pointer to the first character in s not consumed by parsing, or NULL on failure.

See also

https://pubs.opengroup.org/onlinepubs/9699919799/functions/strptime.html

swab()

void swab	(	const void *ZRESTRICT	src,
		void *ZRESTRICT	dest,
		ssize_t	nbytes
	)

Swap bytes in a block of memory (XSI extension).

See also

https://pubs.opengroup.org/onlinepubs/9699919799/functions/swab.html

Variable Documentation

daylight

int daylight

extern

Non-zero if Daylight Saving Time is in effect.

timezone

long timezone

extern

Offset in seconds from UTC for the current timezone.