sortorder Class Reference

Inherits smlevel_0.

List of all members.

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Detailed Description

Class containing basic types used by sort and by B+-Tree key-management.

Definition at line 59 of file lexify.h.

Public Types
enum	keytype
	Enumerator that describes the basic fixed-length and variable-length (sub-)key types that are used in B+-Trees and can be used in sorting. More...
Public Member Functions
bool	lexify (const key_type_s *kp, const void *d, void *res)
	Convert to lexicographic form.
bool	unlexify (const key_type_s *kp, const void *str, void *res)
	Convert from lexicographic form.
Static Public Member Functions
static keytype	convert (const key_type_s *k)
	Convert from a key_type_s to a keytype enumerator value.

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Member Enumeration Documentation

enum sortorder::keytype

Enumerator that describes the basic fixed-length and variable-length (sub-)key types that are used in B+-Trees and can be used in sorting.

• kt_i1 signed 1-byte integer values
• kt_u1 unsigned 1-byte integer values
• kt_i2 signed 2-byte integer values
• kt_u2 unsigned 2-byte integer values
• kt_i4 signed 4-byte integer values
• kt_u4 unsigned 4-byte integer values
• kt_f4 IEEE single precision floating point values
• kt_f8 IEEE double precision floating point values
• kt_b unsigned byte string

Definition at line 90 of file lexify.h.

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Member Function Documentation

bool sortorder::lexify	(	const key_type_s *	kp,
		const void *	d,
		void *	res
	)

Convert to lexicographic form.

Parameters:

[in]	kp	Describes the type and length of the string to be converted.
[in]	d	The string to be converted.
[out]	res	The result.

Invokes a predefined LEXFUNC for the know keytype. Returns true if it worked, false otherwise.

bool sortorder::unlexify	(	const key_type_s *	kp,
		const void *	str,
		void *	res
	)

Convert from lexicographic form.

Parameters:

[in]	kp	Describes the type and length of the string to be converted.
[in]	str	The string in lexicographic form to be converted.
[out]	res	The result.

Invokes a predefined inverse LEXFUNC for the known keytype. Returns true if it worked, false otherwise

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The documentation for this class was generated from the following file:

• src/sm/lexify.h

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