Miscellaneous library routines
[Apache Portability Runtime library]

Defines
#define	FALSE 0
#define	TRUE (!FALSE)
#define	APR_ASCII_BLANK '\040'
#define	APR_ASCII_CR '\015'
#define	APR_ASCII_LF '\012'
#define	APR_ASCII_TAB '\011'
#define	APR_OFFSET(p_type, field) ((long) (((char ) (&(((p_type)NULL)->field))) - ((char ) NULL)))
#define	APR_OFFSETOF(s_type, field) APR_OFFSET(s_type*,field)
#define	APR_ALIGN(size, boundary) (((size) + ((boundary) - 1)) & ~((boundary) - 1))
#define	APR_ALIGN_DEFAULT(size) APR_ALIGN(size, 8)
#define	APR_STRINGIFY(n) APR_STRINGIFY_HELPER(n)
#define	APR_STRINGIFY_HELPER(n) #n
Typedefs
typedef int	apr_signum_t

Detailed Description

This is collection of oddballs that didn't fit anywhere else, and might move to more appropriate headers with the release of APR 1.0.

#define APR_ALIGN	(	size,
		boundary		)	(((size) + ((boundary) - 1)) & ~((boundary) - 1))

Alignment macros

#define APR_ALIGN_DEFAULT ( size ) APR_ALIGN(size, 8)

Default alignment

#define APR_ASCII_BLANK '\040'

a space

#define APR_ASCII_CR '\015'

a carrige return

#define APR_ASCII_LF '\012'

a line feed

#define APR_ASCII_TAB '\011'

a tab

#define APR_OFFSET	(	p_type,
		field		)	((long) (((char ) (&(((p_type)NULL)->field))) - ((char ) NULL)))

Finding offsets of elements within structures. Taken from the X code... they've sweated portability of this stuff so we don't have to. Sigh...

Parameters:

	p_type	pointer type name
	field	data field within the structure pointed to

#define APR_OFFSETOF	(	s_type,
		field		)	APR_OFFSET(s_type*,field)

Finding offsets of elements within structures.

Parameters:

	s_type	structure type name
	field	data field within the structure

#define APR_STRINGIFY ( n ) APR_STRINGIFY_HELPER(n)

String and memory functions Properly quote a value as a string in the C preprocessor

#define APR_STRINGIFY_HELPER ( n ) #n

Helper macro for APR_STRINGIFY

#define FALSE 0

FALSE

#define TRUE (!FALSE)

TRUE

signal numbers typedef