// 
// _mbtowc_l from 0x18013729c to 0x18013741a (382 bytes)
// 
// 6 xrefs:
// > unknown_libname_48 @ 0x18012e42a
// > unknown_libname_49 @ 0x18012e4d2
// > unknown_libname_57 @ 0x18012ee90
// > unknown_libname_58 @ 0x18012ef92
// > mbtowc @ 0x18013741f
// > <???> @ 0x1802035cc
// 
// This function is hookable on this platform!
// 
// Using BromaIDA 8.0.0 @ https://github.com/Stazzical/BromaIDA
// Using bindings at commit ba9f177b at Thu Jul 16 22:52:06 2026 from https://github.com/geode-sdk/bindings
// 

int __cdecl mbtowc_l(wchar_t *DstCh, const char *SrcCh, size_t SrcSizeInBytes, _locale_t Locale)
{
  int v7; // ecx
  struct __crt_locale_data *locinfo; // rcx
  int v10; // r9d
  int v11; // eax
  int *v12; // rax
  struct _Mbstatet *v13; // [rsp+20h] [rbp-38h]
  __int64 v14; // [rsp+30h] [rbp-28h] BYREF
  __crt_locale_pointers Localea; // [rsp+38h] [rbp-20h] BYREF
  char v16; // [rsp+48h] [rbp-10h]

  if ( !SrcCh || !SrcSizeInBytes )
  {
    qword_1801F5568 = 0;
    return 0;
  }
  if ( !*SrcCh )
  {
    if ( DstCh )
      *DstCh = 0;
    return 0;
  }
  _LocaleUpdate::_LocaleUpdate((_LocaleUpdate *)&v14, Locale);
  if ( *((_DWORD *)Localea.locinfo + 3) == 65001 )
  {
    v7 = __crt_mbstring::__mbrtowc_utf8(
           (__crt_mbstring *)DstCh,
           (wchar_t *)SrcCh,
           (const char *)SrcSizeInBytes,
           (unsigned __int64)&qword_1801F5568,
           v13);
    if ( v7 < 0 )
      v7 = -1;
    goto LABEL_14;
  }
  if ( !*((_QWORD *)Localea.locinfo + 39) )
  {
    if ( DstCh )
      *DstCh = *(unsigned __int8 *)SrcCh;
    goto LABEL_13;
  }
  if ( isleadbyte_l(*(unsigned __int8 *)SrcCh, &Localea) )
  {
    locinfo = Localea.locinfo;
    v10 = *((_DWORD *)Localea.locinfo + 2);
    if ( v10 > 1
      && (int)SrcSizeInBytes >= v10
      && (v11 = _acrt_MultiByteToWideChar(*((_DWORD *)Localea.locinfo + 3), 9, SrcCh, v10, DstCh, DstCh != nullptr),
          locinfo = Localea.locinfo,
          v11)
      || SrcSizeInBytes >= *((int *)locinfo + 2) && SrcCh[1] )
    {
      v7 = *((_DWORD *)locinfo + 2);
      goto LABEL_14;
    }
LABEL_25:
    v12 = errno();
    v7 = -1;
    *v12 = 42;
    goto LABEL_14;
  }
  if ( !_acrt_MultiByteToWideChar(*((_DWORD *)Localea.locinfo + 3), 9, SrcCh, 1, DstCh, DstCh != nullptr) )
    goto LABEL_25;
LABEL_13:
  v7 = 1;
LABEL_14:
  if ( v16 )
    *(_DWORD *)(v14 + 936) &= ~2u;
  return v7;
}