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Revision f305016f428db71df44d3e0072e937a8739b4e1a authored by Junio C Hamano on 04 June 2017, 01:21:02 UTC, committed by Junio C Hamano on 04 June 2017, 01:21:02 UTC 
Merge branch 'jk/disable-pack-reuse-when-broken' into maint
 
"pack-objects" can stream a slice of an existing packfile out when
the pack bitmap can tell that the reachable objects are all needed
in the output, without inspecting individual objects.  This
strategy however would not work well when "--local" and other
options are in use, and need to be disabled.

* jk/disable-pack-reuse-when-broken:
  t5310: fix "; do" style
  pack-objects: disable pack reuse for object-selection options
2 parent s 70d19a4 + da5a1f8
Raw File
iterator.h 
#ifndef ITERATOR_H
#define ITERATOR_H

/*
 * Generic constants related to iterators.
 */

/*
 * The attempt to advance the iterator was successful; the iterator
 * reflects the new current entry.
 */
#define ITER_OK 0

/*
 * The iterator is exhausted and has been freed.
 */
#define ITER_DONE -1

/*
 * The iterator experienced an error. The iteration has been aborted
 * and the iterator has been freed.
 */
#define ITER_ERROR -2

/*
 * Return values for selector functions for merge iterators. The
 * numerical values of these constants are important and must be
 * compatible with ITER_DONE and ITER_ERROR.
 */
enum iterator_selection {
	/* End the iteration without an error: */
	ITER_SELECT_DONE = ITER_DONE,

	/* Report an error and abort the iteration: */
	ITER_SELECT_ERROR = ITER_ERROR,

	/*
	 * The next group of constants are masks that are useful
	 * mainly internally.
	 */

	/* The LSB selects whether iter0/iter1 is the "current" iterator: */
	ITER_CURRENT_SELECTION_MASK = 0x01,

	/* iter0 is the "current" iterator this round: */
	ITER_CURRENT_SELECTION_0 = 0x00,

	/* iter1 is the "current" iterator this round: */
	ITER_CURRENT_SELECTION_1 = 0x01,

	/* Yield the value from the current iterator? */
	ITER_YIELD_CURRENT = 0x02,

	/* Discard the value from the secondary iterator? */
	ITER_SKIP_SECONDARY = 0x04,

	/*
	 * The constants that a selector function should usually
	 * return.
	 */

	/* Yield the value from iter0: */
	ITER_SELECT_0 = ITER_CURRENT_SELECTION_0 | ITER_YIELD_CURRENT,

	/* Yield the value from iter0 and discard the one from iter1: */
	ITER_SELECT_0_SKIP_1 = ITER_SELECT_0 | ITER_SKIP_SECONDARY,

	/* Discard the value from iter0 without yielding anything this round: */
	ITER_SKIP_0 = ITER_CURRENT_SELECTION_1 | ITER_SKIP_SECONDARY,

	/* Yield the value from iter1: */
	ITER_SELECT_1 = ITER_CURRENT_SELECTION_1 | ITER_YIELD_CURRENT,

	/* Yield the value from iter1 and discard the one from iter0: */
	ITER_SELECT_1_SKIP_0 = ITER_SELECT_1 | ITER_SKIP_SECONDARY,

	/* Discard the value from iter1 without yielding anything this round: */
	ITER_SKIP_1 = ITER_CURRENT_SELECTION_0 | ITER_SKIP_SECONDARY
};

#endif /* ITERATOR_H */
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