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/********************************************************/
/* 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_crc32.h>
#include "ntapi_impl.h"
static const uint32_t crc32_table[256] = NTAPI_CRC32_TABLE;
uint32_t __ntapi_tt_buffer_crc32(
uint32_t prev_hash,
const void * buffer,
size_t size)
{
const unsigned char * ch;
uint32_t crc32;
crc32 = prev_hash ^ 0xFFFFFFFF;
ch = buffer;
for (; size; size--,ch++)
crc32 = (crc32 >> 8) ^ crc32_table[(crc32 ^ *ch) & 0xFF];
return (crc32 ^ 0xFFFFFFFF);
}
uint32_t __cdecl __ntapi_tt_mbstr_crc32(const void * str)
{
const unsigned char * ch;
uint32_t crc32;
crc32 = 0 ^ 0xFFFFFFFF;
ch = str;
while (*ch) {
crc32 = (crc32 >> 8) ^ crc32_table[(crc32 ^ *ch) & 0xFF];
ch++;
}
return (crc32 ^ 0xFFFFFFFF);
}
const uint32_t * __cdecl __ntapi_tt_crc32_table(void)
{
return crc32_table;
}
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