Mercurial > hg
view mercurial/mpatch.h @ 47425:e0a314bcbc9d
revlog: Extract low-level random-access file read caching logic
The `revlog` class does many things, among which fulfilling requests for
arbitrary byte slices from the revlog "data file" by reading a larger chunk
and caching it in memory, in order to reduce the number of system calls.
This extracts that logic into a new class, so that it may later also be used
for the side-data file (with another instance of that class).
The copyright notice of the new file does not include a date or author name
since such information tend not to be kept up-to-date:
https://www.linuxfoundation.org/en/blog/copyright-notices-in-open-source-software-projects/
Differential Revision: https://phab.mercurial-scm.org/D10878
author | Simon Sapin <simon.sapin@octobus.net> |
---|---|
date | Tue, 08 Jun 2021 19:55:00 +0200 |
parents | 761355833867 |
children | d86908050375 |
line wrap: on
line source
#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