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https://github.com/jerryscript-project/jerryscript.git
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74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/* Copyright 2016 Samsung Electronics Co., Ltd.
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* Copyright 2016 University of Szeged.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "jrt.h"
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/**
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* Read data from a specified buffer.
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*
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* Note:
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* Offset is in-out and is incremented if the read operation completes successfully.
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*
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* @return true, if read was successful, i.e. offset + data_size doesn't exceed buffer size,
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* false - otherwise.
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*/
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bool __attr_always_inline___
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jrt_read_from_buffer_by_offset (const uint8_t *buffer_p, /**< buffer */
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size_t buffer_size, /**< size of buffer */
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size_t *in_out_buffer_offset_p, /**< [in,out] offset to read from /
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* incremented on sizeof (T) */
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void *out_data_p, /**< [out] data */
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size_t out_data_size) /**< size of the readable data */
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{
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if (*in_out_buffer_offset_p + out_data_size > buffer_size)
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{
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return false;
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}
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memcpy (out_data_p, buffer_p + *in_out_buffer_offset_p, out_data_size);
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*in_out_buffer_offset_p += out_data_size;
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return true;
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} /* jrt_read_from_buffer_by_offset */
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/**
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* Write data to a specified buffer.
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*
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* Note:
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* Offset is in-out and is incremented if the write operation completes successfully.
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*
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* @return true, if write was successful, i.e. offset + data_size doesn't exceed buffer size,
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* false - otherwise.
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*/
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bool __attr_always_inline___
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jrt_write_to_buffer_by_offset (uint8_t *buffer_p, /**< buffer */
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size_t buffer_size, /**< size of buffer */
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size_t *in_out_buffer_offset_p, /**< [in,out] offset to read from /
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* incremented on sizeof (T) */
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const void *data_p, /**< data */
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size_t data_size) /**< size of the writable data */
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{
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if (*in_out_buffer_offset_p + data_size > buffer_size)
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{
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return false;
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}
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memcpy (buffer_p + *in_out_buffer_offset_p, data_p, data_size);
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*in_out_buffer_offset_p += data_size;
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return true;
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} /* jrt_write_to_buffer_by_offset */
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