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115 lines
3.6 KiB
C++
Executable File
115 lines
3.6 KiB
C++
Executable File
#ifndef AWS_COMMON_ENCODING_INL
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#define AWS_COMMON_ENCODING_INL
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/*
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* Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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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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* A copy of the License is located at
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*
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* http://aws.amazon.com/apache2.0
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*
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* or in the "license" file accompanying this file. This file is distributed
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* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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#include <aws/common/byte_buf.h>
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#include <aws/common/byte_order.h>
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#include <aws/common/common.h>
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#include <aws/common/encoding.h>
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AWS_EXTERN_C_BEGIN
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/* Add a 64 bit unsigned integer to the buffer, ensuring network - byte order
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* Assumes the buffer size is at least 8 bytes.
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*/
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AWS_STATIC_IMPL void aws_write_u64(uint64_t value, uint8_t *buffer) {
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value = aws_hton64(value);
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memcpy((void *)buffer, &value, sizeof(value));
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}
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/*
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* Extracts a 64 bit unsigned integer from buffer. Ensures conversion from
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* network byte order to host byte order. Assumes buffer size is at least 8
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* bytes.
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*/
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AWS_STATIC_IMPL uint64_t aws_read_u64(const uint8_t *buffer) {
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uint64_t value = 0;
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memcpy((void *)&value, (void *)buffer, sizeof(value));
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return aws_ntoh64(value);
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}
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/* Add a 32 bit unsigned integer to the buffer, ensuring network - byte order
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* Assumes the buffer size is at least 4 bytes.
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*/
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AWS_STATIC_IMPL void aws_write_u32(uint32_t value, uint8_t *buffer) {
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value = aws_hton32(value);
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memcpy((void *)buffer, (void *)&value, sizeof(value));
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}
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/*
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* Extracts a 32 bit unsigned integer from buffer. Ensures conversion from
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* network byte order to host byte order. Assumes the buffer size is at least 4
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* bytes.
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*/
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AWS_STATIC_IMPL uint32_t aws_read_u32(const uint8_t *buffer) {
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uint32_t value = 0;
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memcpy((void *)&value, (void *)buffer, sizeof(value));
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return aws_ntoh32(value);
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}
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/* Add a 24 bit unsigned integer to the buffer, ensuring network - byte order
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* return the new position in the buffer for the next operation.
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* Note, since this uses uint32_t for storage, the 3 least significant bytes
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* will be used. Assumes buffer is at least 3 bytes long.
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*/
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AWS_STATIC_IMPL void aws_write_u24(uint32_t value, uint8_t *buffer) {
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value = aws_hton32(value);
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memcpy((void *)buffer, (void *)((uint8_t *)&value + 1), sizeof(value) - 1);
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}
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/*
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* Extracts a 24 bit unsigned integer from buffer. Ensures conversion from
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* network byte order to host byte order. Assumes buffer is at least 3 bytes
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* long.
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*/
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AWS_STATIC_IMPL uint32_t aws_read_u24(const uint8_t *buffer) {
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uint32_t value = 0;
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memcpy((void *)((uint8_t *)&value + 1), (void *)buffer, sizeof(value) - 1);
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return aws_ntoh32(value);
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}
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/* Add a 16 bit unsigned integer to the buffer, ensuring network-byte order
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* return the new position in the buffer for the next operation.
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* Assumes buffer is at least 2 bytes long.
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*/
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AWS_STATIC_IMPL void aws_write_u16(uint16_t value, uint8_t *buffer) {
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value = aws_hton16(value);
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memcpy((void *)buffer, (void *)&value, sizeof(value));
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}
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/*
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* Extracts a 16 bit unsigned integer from buffer. Ensures conversion from
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* network byte order to host byte order. Assumes buffer is at least 2 bytes
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* long.
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*/
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AWS_STATIC_IMPL uint16_t aws_read_u16(const uint8_t *buffer) {
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uint16_t value = 0;
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memcpy((void *)&value, (void *)buffer, sizeof(value));
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return aws_ntoh16(value);
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}
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AWS_EXTERN_C_END
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#endif /* AWS_COMMON_ENCODING_INL */
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