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guard WideCharToMultiByte() against empty strings #560

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guard WideCharToMultiByte() against empty strings #560

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4 changes: 4 additions & 0 deletions src/detail/utf8.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,8 @@ inline void handle_error(error_code & ec)

std::size_t size_as_utf8(const wchar_t * in, std::size_t size, error_code & ec)
{
if (size == 0u)
return 0u;
auto res = WideCharToMultiByte(
CP_UTF8, // CodePage,
0, // dwFlags,
Expand Down Expand Up @@ -72,6 +74,8 @@ std::size_t size_as_wide(const char * in, std::size_t size, error_code & ec)
std::size_t convert_to_utf8(const wchar_t *in, std::size_t size, char * out,
std::size_t max_size, error_code & ec)
{
if (size == 0u)
return 0u;
auto res = ::WideCharToMultiByte(
CP_UTF8, // CodePage
0, // dwFlags
Expand Down
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