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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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