42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
typedef struct range {
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long start;
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long stop;
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} range;
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typedef struct transition {
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long pos;
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// negative if end of range. Never zero
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int delta;
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// >= abs(delta). Number of times the range immediately less than
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// this point is pinned.
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int pins;
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} transition;
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typedef struct rangeTracker rangeTracker;
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rangeTracker * rangeTrackerInit(int quantization);
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void rangeTrackerDeinit(rangeTracker * rt);
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/**
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Add a new range
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@return a null terminated array of newly-pinned, quantized ranges.
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This array might contain ranges that were already pinned, and/or
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ones that overlap (this aspect of the behavior is intentionally
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left unspecified).
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*/
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range ** rangeTrackerAdd(rangeTracker * rt, const range * r);
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/**
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Remove a range
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@return a null terminated array of unpinned, quantized ranges.
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@see rangeTrackerAdd for a discussion of approximations that may
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be applied to rangeTrackerRemove's return value.
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*/
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range ** rangeTrackerRemove(rangeTracker * rt, const range * r);
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const transition ** rangeTrackerEnumerate(rangeTracker * rt);
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char * rangeToString(const range * r);
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char * transitionToString(const transition * t);
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