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Текущая директория: /opt/BitGoJS/node_modules/secp256k1/src/secp256k1/src
Просмотр файла: scratch.h
/**********************************************************************
* Copyright (c) 2017 Andrew Poelstra *
* Distributed under the MIT software license, see the accompanying *
* file COPYING or http://www.opensource.org/licenses/mit-license.php.*
**********************************************************************/
#ifndef _SECP256K1_SCRATCH_
#define _SECP256K1_SCRATCH_
/* The typedef is used internally; the struct name is used in the public API
* (where it is exposed as a different typedef) */
typedef struct secp256k1_scratch_space_struct {
/** guard against interpreting this object as other types */
unsigned char magic[8];
/** actual allocated data */
void *data;
/** amount that has been allocated (i.e. `data + offset` is the next
* available pointer) */
size_t alloc_size;
/** maximum size available to allocate */
size_t max_size;
} secp256k1_scratch;
static secp256k1_scratch* secp256k1_scratch_create(const secp256k1_callback* error_callback, size_t max_size);
static void secp256k1_scratch_destroy(const secp256k1_callback* error_callback, secp256k1_scratch* scratch);
/** Returns an opaque object used to "checkpoint" a scratch space. Used
* with `secp256k1_scratch_apply_checkpoint` to undo allocations. */
static size_t secp256k1_scratch_checkpoint(const secp256k1_callback* error_callback, const secp256k1_scratch* scratch);
/** Applies a check point received from `secp256k1_scratch_checkpoint`,
* undoing all allocations since that point. */
static void secp256k1_scratch_apply_checkpoint(const secp256k1_callback* error_callback, secp256k1_scratch* scratch, size_t checkpoint);
/** Returns the maximum allocation the scratch space will allow */
static size_t secp256k1_scratch_max_allocation(const secp256k1_callback* error_callback, const secp256k1_scratch* scratch, size_t n_objects);
/** Returns a pointer into the most recently allocated frame, or NULL if there is insufficient available space */
static void *secp256k1_scratch_alloc(const secp256k1_callback* error_callback, secp256k1_scratch* scratch, size_t n);
#endif
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