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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ESE_SG_H_
#define ESE_SG_H_ 1
#include <ese/sysdeps.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Scatter-Gather Buffer */
struct EseSgBuffer {
union {
uint8_t *base;
const uint8_t *c_base;
};
uint32_t len;
};
#define ese_sg_set(ese_sg_ptr, buf, len) \
(ese_sg_ptr)->base = buf; \
(ese_sg_ptr)->len = len
/* Computes the total length/size of the buffer on each call. */
uint32_t ese_sg_length(const struct EseSgBuffer *bufs, uint32_t cnt);
uint32_t ese_sg_to_buf(const struct EseSgBuffer *src, uint32_t src_cnt, uint32_t start_at, uint32_t length, uint8_t *dst);
uint32_t ese_sg_from_buf(struct EseSgBuffer *dst, uint32_t dst_cnt, uint32_t start_at, uint32_t length, const uint8_t *src);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* ESE_SG_H_ */
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