/********************************************************/
/*  ntapi: Native API core library                      */
/*  Copyright (C) 2013--2021  SysDeer Technologies, LLC */
/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
/********************************************************/

#include <psxtypes/psxtypes.h>
#include <ntapi/nt_crc64.h>
#include "ntapi_impl.h"

static const uint64_t crc64_table[256] = NTAPI_CRC64_TABLE;

uint64_t __ntapi_tt_buffer_crc64(
	uint64_t	prev_hash,
	const void *	buffer,
	size_t		size)
{
	const unsigned char *	ch;
	uint64_t		crc64;

	crc64	= prev_hash ^ 0xFFFFFFFFFFFFFFFF;
	ch	= buffer;

	for (; size; size--,ch++)
		crc64 = (crc64 >> 8) ^ crc64_table[(crc64 ^ *ch) & 0xFF];

	return (crc64 ^ 0xFFFFFFFFFFFFFFFF);
}

uint64_t __cdecl __ntapi_tt_mbstr_crc64(const void * str)
{
	const unsigned char *	ch;
	uint64_t		crc64;

	crc64	= 0 ^ 0xFFFFFFFFFFFFFFFF;
	ch	= str;

	while (*ch) {
		crc64 = (crc64 >> 8) ^ crc64_table[(crc64 ^ *ch) & 0xFF];
		ch++;
	}

	return (crc64 ^ 0xFFFFFFFFFFFFFFFF);
}


const uint64_t * __cdecl __ntapi_tt_crc64_table(void)
{
	return crc64_table;
}