upstream/mercurial-mirror Files · mercurial/mpatch.h

revset: remove "small" argument from "_optimize"...

revset: remove "small" argument from "_optimize" `_optimize` calculates weights of subtrees. "small" affects some weight calculation (either 1 or 0.5). The weights are now only useful in `and` optimization where we might swap two arguments and use `andsmally`. In the real world, it seems unlikely that revsets with weight of 0.5 or 1 matters the `and` order optimization. I think the important thing is to get weights of expensive revsets right (ex. `contains`). This patch removes the `small` argument to simplify the interface. As for choosing between 0.5 vs 1, things returning a single revision (`ancestor`, `string`) has a weight of 0.5. Things returning multiple revisions returns 1. This could be sometimes useful in the `andsmally` optimization, ex. (((:)-2) & expensive()) & ((1-2) & expensive()) ^^^ ^ ^^^^^^^ ^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^ weight=1 weight=0.5 would have an `andsmally` optimization so `1-2` gets executed first, which seems to be desirable. Differential Revision: https://phab.mercurial-scm.org/D656

Yuya Nishihara - - Load All Authors

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      #ifndef _HG_MPATCH_H_

      #define _HG_MPATCH_H_

      #define MPATCH_ERR_NO_MEM -3

      #define MPATCH_ERR_CANNOT_BE_DECODED -2

      #define MPATCH_ERR_INVALID_PATCH -1

      struct mpatch_frag {

      	int start, end, len;

      	const char *data;

      };

      struct mpatch_flist {

      	struct mpatch_frag *base, *head, *tail;

      };

      int mpatch_decode(const char *bin, ssize_t len, struct mpatch_flist** res);

      ssize_t mpatch_calcsize(ssize_t len, struct mpatch_flist *l);

      void mpatch_lfree(struct mpatch_flist *a);

      int mpatch_apply(char *buf, const char *orig, ssize_t len,

      	struct mpatch_flist *l);

      struct mpatch_flist *mpatch_fold(void *bins,

      	struct mpatch_flist* (*get_next_item)(void*, ssize_t),

      	ssize_t start, ssize_t end);

      #endif

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				#ifndef _HG_MPATCH_H_
				#define _HG_MPATCH_H_

				#define MPATCH_ERR_NO_MEM -3
				#define MPATCH_ERR_CANNOT_BE_DECODED -2
				#define MPATCH_ERR_INVALID_PATCH -1

				struct mpatch_frag {
				int start, end, len;
				const char *data;
				};

				struct mpatch_flist {
				struct mpatch_frag base, head, *tail;
				};

				int mpatch_decode(const char bin, ssize_t len, struct mpatch_flist* res);
				ssize_t mpatch_calcsize(ssize_t len, struct mpatch_flist *l);
				void mpatch_lfree(struct mpatch_flist *a);
				int mpatch_apply(char buf, const char orig, ssize_t len,
				struct mpatch_flist *l);
				struct mpatch_flist mpatch_fold(void bins,
				struct mpatch_flist* (get_next_item)(void, ssize_t),
				ssize_t start, ssize_t end);

				#endif