// 
// __crt_mbstring::__mbsrtowcs_utf8 from 0x18013daac to 0x18013dc22 (374 bytes)
// 
// 3 xrefs:
// > write_double_translated_ansi_nolock @ 0x18013fbb0
// > write_double_translated_ansi_nolock @ 0x18013fc18
// > <???> @ 0x180203b18
// 
// 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
// 

__int64 __fastcall __crt_mbstring::__mbsrtowcs_utf8(
        __crt_mbstring *this,
        wchar_t *a2,
        const char **a3,
        unsigned __int64 a4)
{
  __int64 v4; // rdi
  const char **v6; // rbp
  __crt_mbstring *v9; // rbx
  __int64 v10; // r8
  unsigned __int64 v11; // rax
  __int16 v12; // cx
  unsigned int v13; // ecx
  __int64 i; // rbx
  __int64 v16; // r8
  unsigned __int64 v17; // rax
  struct _Mbstatet *v18; // [rsp+20h] [rbp-28h]
  unsigned int v19; // [rsp+50h] [rbp+8h] BYREF

  v4 = *(_QWORD *)a2;
  v6 = a3;
  if ( !this )
  {
    for ( i = 0; ; ++i )
    {
      if ( *(_BYTE *)v4 )
        v16 = *(_BYTE *)(v4 + 1) ? (*(_BYTE *)(v4 + 2) != 0) + 3LL : 2LL;
      else
        v16 = 1;
      v17 = __crt_mbstring::__mbrtoc32_utf8(nullptr, (char32_t *)v4, (const char *)v16, a4, v18);
      if ( v17 == -1 )
        break;
      if ( !v17 )
        return i;
      if ( v17 == 4 )
        ++i;
      v4 += v17;
    }
    goto LABEL_18;
  }
  v9 = this;
  if ( a3 )
  {
    while ( 1 )
    {
      if ( *(_BYTE *)v4 )
        v10 = *(_BYTE *)(v4 + 1) ? (*(_BYTE *)(v4 + 2) != 0) + 3LL : 2LL;
      else
        v10 = 1;
      v11 = __crt_mbstring::__mbrtoc32_utf8((__crt_mbstring *)&v19, (char32_t *)v4, (const char *)v10, a4, v18);
      if ( v11 == -1 )
        break;
      if ( !v11 )
      {
        v4 = 0;
        *(_WORD *)v9 = 0;
        goto LABEL_14;
      }
      v12 = v19;
      if ( v19 > 0xFFFF )
      {
        if ( (unsigned __int64)v6 <= 1 )
          goto LABEL_14;
        v13 = v19 - 0x10000;
        v19 = v13;
        v6 = (const char **)((char *)v6 - 1);
        *(_WORD *)v9 = (v13 >> 10) | 0xD800;
        v9 = (__crt_mbstring *)((char *)v9 + 2);
        v12 = v13 & 0x3FF | 0xDC00;
      }
      *(_WORD *)v9 = v12;
      v4 += v11;
      v9 = (__crt_mbstring *)((char *)v9 + 2);
      v6 = (const char **)((char *)v6 - 1);
      if ( !v6 )
        goto LABEL_14;
    }
    *(_QWORD *)a2 = v4;
LABEL_18:
    *errno() = 42;
    return -1;
  }
LABEL_14:
  *(_QWORD *)a2 = v4;
  return (v9 - this) >> 1;
}