dbDefs.h File Reference

Miscellaneous macro definitions. More...

#include <stddef.h>

Include dependency graph for dbDefs.h:

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Macros
#define	TRUE   1
#define	FALSE   0
#define	LOCAL   static
	Deprecated synonym for static. More...
#define	NELEMENTS(array)   (sizeof (array) / sizeof ((array) [0]))
	Number of elements in array. More...
#define	OFFSET(structure, member)   offsetof(structure, member)
	Deprecated synonym for offsetof. More...
#define	CONTAINER(ptr, structure, member)   ((structure*)((char*)(ptr) - offsetof(structure, member)))
	Find parent object from a member pointer. More...
#define	PVNAME_STRINGSZ   61
	Size of a record name including the nil terminator. More...
#define	PVNAME_SZ   (PVNAME_STRINGSZ - 1)
	Size of a record name without the nil terminator. More...
#define	PVLINK_STRINGSZ   1024
	Buffer size for the string representation of a DBF_*LINK field. More...
#define	DB_MAX_CHOICES   30
	dbAccess enums/menus can have up to this many choices More...

Detailed Description

Miscellaneous macro definitions.

Author

Marty Kraimer

This file defines several miscellaneous macros.

Definition in file dbDefs.h.

Macro Definition Documentation

#define CONTAINER	(		ptr,
			structure,
			member
	)		((structure*)((char*)(ptr) - offsetof(structure, member)))

Find parent object from a member pointer.

Subtracts the byte offset of the member in the structure from the pointer to the member itself, giving a pointer to parent strucure.

Parameters

ptr	Pointer to a member data field of a structure
structure	Type name of the parent structure
member	Field name of the data member

Returns

Pointer to the parent structure

Note

Both GCC and Clang will type-check this macro.

Definition at line 66 of file dbDefs.h.

#define DB_MAX_CHOICES   30

dbAccess enums/menus can have up to this many choices

Definition at line 81 of file dbDefs.h.

#define FALSE   0

Definition at line 32 of file dbDefs.h.

#define LOCAL   static

Deprecated synonym for static.

Definition at line 36 of file dbDefs.h.

#define NELEMENTS

(

array

)

(sizeof (array) / sizeof ((array) [0]))

Number of elements in array.

Definition at line 41 of file dbDefs.h.

#define OFFSET	(		structure,
			member
	)		offsetof(structure, member)

Deprecated synonym for offsetof.

Definition at line 46 of file dbDefs.h.

#define PVLINK_STRINGSZ   1024

Buffer size for the string representation of a DBF_*LINK field.

Definition at line 78 of file dbDefs.h.

#define PVNAME_STRINGSZ   61

Size of a record name including the nil terminator.

Definition at line 72 of file dbDefs.h.

#define PVNAME_SZ   (PVNAME_STRINGSZ - 1)

Size of a record name without the nil terminator.

Definition at line 74 of file dbDefs.h.

#define TRUE   1

Definition at line 27 of file dbDefs.h.