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#ifndef AWS_COMMON_PRIVATE_BYTE_BUF_H
#define AWS_COMMON_PRIVATE_BYTE_BUF_H
/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/common/byte_buf.h>
/**
* If index >= bound, bound > (SIZE_MAX / 2), or index > (SIZE_MAX / 2), returns
* 0. Otherwise, returns UINTPTR_MAX. This function is designed to return the correct
* value even under CPU speculation conditions, and is intended to be used for
* SPECTRE mitigation purposes.
*/
AWS_COMMON_API size_t aws_nospec_mask(size_t index, size_t bound);
/**
* Expand the buffer appropriately to meet the requested capacity.
*
* If the the buffer's capacity is currently larger than the request capacity, the
* function does nothing (no shrink is performed).
*/
AWS_COMMON_API
int aws_byte_buf_reserve_smart(struct aws_byte_buf *buffer, size_t requested_capacity);
/**
* Convenience function that attempts to increase the capacity of a buffer relative to the current
* length appropriately.
*
* If the the buffer's capacity is currently larger than the request capacity, the
* function does nothing (no shrink is performed).
*/
AWS_COMMON_API
int aws_byte_buf_reserve_smart_relative(struct aws_byte_buf *buffer, size_t additional_length);
#endif /* AWS_COMMON_PRIVATE_BYTE_BUF_H */
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