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/********************************************************/
/* ntapi: Native API core library */
/* Copyright (C) 2013--2016 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
/********************************************************/
#include <psxtypes/psxtypes.h>
#include <ntapi/nt_string.h>
#include "ntapi_impl.h"
size_t __cdecl __ntapi_tt_string_null_offset_multibyte(
__in const char * str)
{
const char * cap;
const uintptr_t * ptr;
#define HIGH_BIT_TEST (uintptr_t)0x0101010101010101
#define AND_BITS (uintptr_t)0x8080808080808080
cap = str;
while ((uintptr_t)cap % sizeof(uintptr_t)) {
if (!(*cap))
return cap - str;
cap++;
}
ptr = (uintptr_t *)cap;
while (!((*ptr - HIGH_BIT_TEST) & ~(*ptr) & AND_BITS))
ptr++;
cap = (const char *)ptr;
while (*cap)
cap++;
return cap - str;
}
size_t __cdecl __ntapi_tt_string_null_offset_short(
__in const int16_t * str)
{
const int16_t * cap;
cap = str;
while (*cap)
cap++;
return (size_t)cap - (size_t)str;
}
size_t __cdecl __ntapi_tt_string_null_offset_dword(
__in const int32_t * str)
{
const int32_t * cap;
cap = str;
while (*cap)
cap++;
return (size_t)cap - (size_t)str;
}
size_t __cdecl __ntapi_tt_string_null_offset_qword(
__in const int64_t * str)
{
const int64_t * cap;
cap = str;
while (*cap)
cap++;
return (size_t)cap - (size_t)str;
}
size_t __cdecl __ntapi_tt_string_null_offset_ptrsize(
__in const intptr_t *str)
{
const intptr_t * cap;
cap = str;
while (*cap)
cap++;
return (size_t)cap - (size_t)str;
}
size_t __cdecl __ntapi_tt_wcslen(const wchar16_t * str)
{
size_t len;
len = __ntapi_tt_string_null_offset_short((const int16_t *)str);
return len / 2;
}
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