write.c

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/*****************************************************************************
 *   (c) 2020 Ledger SAS.
 *
 *  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.
 *****************************************************************************/
 
#include <stdint.h>  // uint*_t
#include <stddef.h>  // size_t
 
void write_u16_be(uint8_t *ptr, size_t offset, uint16_t value)
{
    ptr[offset + 0] = (uint8_t) (value >> 8);
    ptr[offset + 1] = (uint8_t) (value >> 0);
}
 
void write_u32_be(uint8_t *ptr, size_t offset, uint32_t value)
{
    ptr[offset + 0] = (uint8_t) (value >> 24);
    ptr[offset + 1] = (uint8_t) (value >> 16);
    ptr[offset + 2] = (uint8_t) (value >> 8);
    ptr[offset + 3] = (uint8_t) (value >> 0);
}
 
void write_u64_be(uint8_t *ptr, size_t offset, uint64_t value)
{
    ptr[offset + 0] = (uint8_t) (value >> 56);
    ptr[offset + 1] = (uint8_t) (value >> 48);
    ptr[offset + 2] = (uint8_t) (value >> 40);
    ptr[offset + 3] = (uint8_t) (value >> 32);
    ptr[offset + 4] = (uint8_t) (value >> 24);
    ptr[offset + 5] = (uint8_t) (value >> 16);
    ptr[offset + 6] = (uint8_t) (value >> 8);
    ptr[offset + 7] = (uint8_t) (value >> 0);
}
 
void write_u16_le(uint8_t *ptr, size_t offset, uint16_t value)
{
    ptr[offset + 0] = (uint8_t) (value >> 0);
    ptr[offset + 1] = (uint8_t) (value >> 8);
}
 
void write_u32_le(uint8_t *ptr, size_t offset, uint32_t value)
{
    ptr[offset + 0] = (uint8_t) (value >> 0);
    ptr[offset + 1] = (uint8_t) (value >> 8);
    ptr[offset + 2] = (uint8_t) (value >> 16);
    ptr[offset + 3] = (uint8_t) (value >> 24);
}
 
void write_u64_le(uint8_t *ptr, size_t offset, uint64_t value)
{
    ptr[offset + 0] = (uint8_t) (value >> 0);
    ptr[offset + 1] = (uint8_t) (value >> 8);
    ptr[offset + 2] = (uint8_t) (value >> 16);
    ptr[offset + 3] = (uint8_t) (value >> 24);
    ptr[offset + 4] = (uint8_t) (value >> 32);
    ptr[offset + 5] = (uint8_t) (value >> 40);
    ptr[offset + 6] = (uint8_t) (value >> 48);
    ptr[offset + 7] = (uint8_t) (value >> 56);
}