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/*
protocols.h
Copyright 1991,NeXT Computer,Inc.
*/
#import <store/protocols.h>
typedef int
IXComparator(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
#ifdef NX_COMPILER_RELEASE_3_0
@protocol IXComparatorSetting
#else
@interface Object(IXComparatorSetting)
#endif
/* context is arbitrary, caller supplied pointer passed to comparator. */
/* comparator is not saved across free/init.*/
- getComparator:(IXComparator **)comparator andContext:(const void **)context;
- setComparator:(IXComparator *)comparator andContext:(const void *)context;
@end
#ifdef NX_COMPILER_RELEASE_3_0
@protocol IXComparisonSetting
#else
@interface Object(IXComparisonSetting)
#endif
/* caller supplied comparator is cleared, and format string is installed*/
/* format string is not saved across free/init.*/
- (const char *)comparisonFormat;
- setComparisonFormat:(const char *)aFormat;
@end
#ifdef NX_COMPILER_RELEASE_3_0
@protocol IXCursorPositioning
#else
@interface Object(IXCursorPositioning)
#endif
- (BOOL)setFirst; /* positions cursor at first key in key space*/
- (BOOL)setLast; /* positions cursor at last key in key space*/
- (BOOL)setNext; /* positions cursor at next key in key space*/
- (BOOL)setPrevious; /* position cursor at previous key in key space*/
- (BOOL)getKey:(const void **)key /* returns value of key at cursor*/
andLength:(unsigned *)length;
- (BOOL)setKey:(const void *)key /* positions cursor at supplied key*/
andLength:(unsigned)length;
- (BOOL)isMatch; /* true if cursor matched a key on last operation*/
@end
/* a weighted reference to something that can be described by a handle.*/
/* note that the weight is not interpreted, and may be any unsigned value, */
/* such as a hint or a another handle.*/
typedef struct IXPosting {
unsigned handle;
unsigned weight;
} IXPosting;
#ifdef NX_COMPILER_RELEASE_3_0
@protocol IXPostingExchange
#else
@interface Object(IXPostingExchange)
#endif
/* a copy of the receiver's postings is returned by get. caller must free.*/
/* set does not consume the copy.*/
- getCount:(unsigned *)theCount andPostings:(IXPosting **)thePostings;
- setCount:(unsigned)theCount andPostings:(const IXPosting *)thePostings;
@end
#ifdef NX_COMPILER_RELEASE_3_0
@protocol IXPostingOperations
#else
@interface Object(IXPostingOperations)
#endif
- addHandle:(unsigned)handle withWeight:(unsigned)weight;
- removeHandle:(unsigned)handle;
- empty;
- (unsigned)count;
/* for iterating over the handles. zero is returned at end of list.*/
- (unsigned)setFirstHandle;
- (unsigned)setNextHandle;
/* sets to the supplied handle, or if not found, to the next larger handle*/
- (unsigned)setHandle:(unsigned)handle;
- (unsigned)getHandle:(unsigned *)handle andWeight:(unsigned *)weight;
@end
/* default comparator routines for use with IXBTree.*/
extern int
IXFormatComparator(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, void *format);
extern int
IXCompareStrings(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareMonocaseStrings(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareBytes(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareShort(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareShorts(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareLong(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareLongs(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareUnsignedBytes(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareUnsignedShort(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareUnsignedShorts(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareUnsignedLong(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareUnsignedLongs(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareFloat(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareFloats(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareDouble(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareDoubles(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareStringAndUnsigneds(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
extern int
IXCompareUnsignedAndStrings(const void *data1, unsigned short length1,
const void *data2, unsigned short length2, const void *context);
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