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Jef 2024-09-24 14:54:57 +02:00
parent 537bcbc862
commit fc06254474
16440 changed files with 4239995 additions and 2 deletions
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77
Src/replicant/nu/ByteWriter.c Normal file
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#include "ByteWriter.h"
#include <string.h>
/* generic endian-agnostic implementation. this code assumes that unaligned accesses are illegal */
void bytewriter_init(bytewriter_t byte_writer, void *data, size_t byte_length)
{
byte_writer->data = data;
byte_writer->byte_length = byte_length;
byte_writer->data_ptr = (uint8_t *)data;
}
/* n byte functions */
void bytewriter_write_n(bytewriter_t byte_writer, const void *source, size_t bytes)
{
memcpy(byte_writer->data_ptr, source, bytes);
byte_writer->data_ptr += bytes;
}
void bytewriter_write_u8(bytewriter_t byte_writer, uint8_t value)
{
*byte_writer->data_ptr++ = value;
byte_writer->byte_length--;
}
void bytewriter_write_u16_le(bytewriter_t byte_writer, uint16_t value)
{
*byte_writer->data_ptr++ = value & 0xFF;
value >>= 8;
*byte_writer->data_ptr++ = value & 0xFF;
byte_writer->byte_length -= 2;
}
void bytewriter_write_u16_be(bytewriter_t byte_writer, uint16_t value)
{
*byte_writer->data_ptr++ = (value >> 8) & 0xFF;
*byte_writer->data_ptr++ = value & 0xFF;
byte_writer->byte_length -= 2;
}
void bytewriter_write_u32_le(bytewriter_t byte_writer, uint32_t value)
{
*byte_writer->data_ptr++ = value & 0xFF;
value >>= 8;
*byte_writer->data_ptr++ = value & 0xFF;
value >>= 8;
*byte_writer->data_ptr++ = value & 0xFF;
value >>= 8;
*byte_writer->data_ptr++ = value & 0xFF;
byte_writer->byte_length -= 4;
}
void bytewriter_write_u32_be(bytewriter_t byte_writer, uint32_t value)
{
*byte_writer->data_ptr++ = (value >> 24) & 0xFF;
*byte_writer->data_ptr++ = (value >> 16) & 0xFF;
*byte_writer->data_ptr++ = (value >> 8) & 0xFF;
*byte_writer->data_ptr++ = value & 0xFF;
byte_writer->byte_length -= 4;
}
void bytewriter_write_zero_n(bytewriter_t byte_writer, size_t bytes)
{
size_t i;
for (i=0;i<bytes;i++)
{
*byte_writer->data_ptr++ = 0;
}
byte_writer->byte_length -= bytes;
}
void bytewriter_write_uuid_be(bytewriter_t byte_writer, GUID guid_value)
{
bytewriter_write_u32_be(byte_writer, guid_value.Data1);
bytewriter_write_u16_be(byte_writer, guid_value.Data2);
bytewriter_write_u16_be(byte_writer, guid_value.Data3);
bytewriter_write_n(byte_writer, guid_value.Data4, 8);
}