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Use fputws for outputting wide strings

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Also adds fwide byte/wide orientation checking to verify streams are
able to receive the character type in question.

On Windows, the fwide calls are no-ops that pass through the second
arg and optimize out the if statement entirely.
This commit is contained in:
Jack Andersen 2019-07-24 16:44:29 -10:00 committed by Victor Zverovich
parent 1235f0a24a
commit 8bd59ec936
1 changed files with 5 additions and 1 deletions
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6
include/fmt/format-inl.h
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@ -19,6 +19,7 @@
#include <cstdarg>
#include <cstddef> // for std::ptrdiff_t
#include <cstring> // for std::memmove
#include <cwchar>
#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
# include <locale>
#endif
@ -977,7 +978,10 @@ FMT_FUNC void vprint(std::FILE* f, string_view format_str, format_args args) {
FMT_FUNC void vprint(std::FILE* f, wstring_view format_str, wformat_args args) {
wmemory_buffer buffer;
internal::vformat_to(buffer, format_str, args);
internal::fwrite_fully(buffer.data(), sizeof(wchar_t), buffer.size(), f);
buffer.push_back(L'\0');
if (std::fputws(buffer.data(), f) == -1) {
FMT_THROW(system_error(errno, "cannot write to file"));
}
}
FMT_FUNC void vprint(string_view format_str, format_args args) {