| /* |
| * 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 "../../../libese-sysdeps/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_ */ |