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Reactos
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889//// mbrtoc16.cpp//// Copyright (c) Microsoft Corporation. All rights reserved.//
#include <corecrt_internal_mbstring.h>#include <corecrt_internal_ptd_propagation.h>#include <errno.h>#include <uchar.h>#include <wchar.h>
using namespace __crt_mbstring;
namespace{ inline size_t begin_surrogate_state(char16_t* pc16, char32_t c32, size_t retval, mbstate_t* ps) { ps->_Wchar = c32; ps->_State = static_cast<decltype(ps->_State)>(-1); if (pc16) { *pc16 = static_cast<char16_t>((((c32 - 0x10000) & 0xfffff) >> 10) | 0xd800); } return retval; }
inline size_t end_surrogate_state(char16_t* pc16, mbstate_t* ps) { if (pc16) { *pc16 = ((ps->_Wchar - 0x10000) & 0x03ff) | 0xdc00; } return reset_and_return(static_cast<size_t>(-3), ps); }
inline bool is_surrogate_state(const mbstate_t* ps) { return ps->_State == static_cast<decltype(ps->_State)>(-1); }}
extern "C" size_t __cdecl mbrtoc16(char16_t* pc16, const char* s, size_t n, mbstate_t* ps){ // TODO: Bug 13307590 says this is always assuming UTF-8. __crt_cached_ptd_host ptd; return __mbrtoc16_utf8(pc16, s, n, ps, ptd);}
size_t __cdecl __crt_mbstring::__mbrtoc16_utf8(char16_t* pc16, const char* s, size_t n, mbstate_t* ps, __crt_cached_ptd_host& ptd){ static mbstate_t internal_pst{}; if (ps == nullptr) { ps = &internal_pst; }
if (is_surrogate_state(ps)) { return end_surrogate_state(pc16, ps); }
char32_t c32; const size_t retval = __mbrtoc32_utf8(&c32, s, n, ps, ptd); if (!s || retval == INVALID || retval == INCOMPLETE) { return retval; } else if (c32 > 0x10ffff) { // Input is out of range for UTF-16 return return_illegal_sequence(ps, ptd); }
// Got a valid character if (c32 <= 0xffff) { if (pc16) { *pc16 = static_cast<char16_t>(c32); } return reset_and_return(retval, ps); } else { return begin_surrogate_state(pc16, c32, retval, ps); }}