mirror of
https://github.com/libretro/RetroArch.git
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76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2015 - Daniel De Matteis
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* Copyright (C) 2014-2015 - Alfred Agrell
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __RARCH_REWIND_H
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#define __RARCH_REWIND_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stddef.h>
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#include <boolean.h>
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#include <stdint.h>
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typedef struct state_manager state_manager_t;
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state_manager_t *state_manager_new(size_t state_size, size_t buffer_size);
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void state_manager_free(state_manager_t *state);
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bool state_manager_pop(state_manager_t *state, const void **data);
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void state_manager_push_where(state_manager_t *state, void **data);
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void state_manager_push_do(state_manager_t *state);
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void state_manager_capacity(state_manager_t *state,
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unsigned int *entries, size_t *bytes, bool *full);
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void init_rewind(void);
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/* Returns the maximum compressed size of a savestate. It is very likely to compress to far less. */
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size_t state_manager_raw_maxsize(size_t uncomp);
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/*
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* See state_manager_raw_compress for information about this.
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* When you're done with it, send it to free().
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*/
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void *state_manager_raw_alloc(size_t len, uint16_t uniq);
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/*
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* Takes two savestates and creates a patch that turns 'src' into 'dst'.
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* Both 'src' and 'dst' must be returned from state_manager_raw_alloc(), with the same 'len', and different 'uniq'.
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* 'patch' must be size 'state_manager_raw_maxsize(len)' or more.
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* Returns the number of bytes actually written to 'patch'.
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*/
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size_t state_manager_raw_compress(const void *src, const void *dst, size_t len, void *patch);
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/*
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* Takes 'patch' from a previous call to 'state_manager_raw_compress' and applies it to 'data' ('src' from that call),
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* yielding 'dst' in that call.
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* If the given arguments do not match a previous call to state_manager_raw_compress(), anything at all can happen.
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*/
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void state_manager_raw_decompress(const void *patch, size_t patchlen, void *data, size_t datalen);
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#ifdef __cplusplus
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}
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#endif
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#endif
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