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Implement logger_t::log_fmt for narrow chars by trampolining to wide chars

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This satifies the glibc.
This commit is contained in:
ridiculousfish 2019-12-08 14:43:30 -08:00
parent 92a16921bf
commit e3b8203187
1 changed files with 19 additions and 4 deletions
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23
src/flog.cpp
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@ -56,13 +56,28 @@ void logger_t::log_fmt(const category_t &cat, const wchar_t *fmt, ...) {
}
void logger_t::log_fmt(const category_t &cat, const char *fmt, ...) {
// glibc dislikes mixing wide and narrow output functions.
// So construct a narrow string in-place and output that via wide functions.
va_list va;
va_start(va, fmt);
log1(cat.name);
log1(": ");
std::vfprintf(file_, fmt, va);
log1('\n');
int ret = vsnprintf(nullptr, 0, fmt, va);
va_end(va);
if (ret < 0) {
perror("vsnprintf");
return;
}
size_t len = static_cast<size_t>(ret) + 1;
std::unique_ptr<char[]> buff(new char[len]);
va_start(va, fmt);
ret = vsnprintf(buff.get(), len, fmt, va);
va_end(va);
if (ret < 0) {
perror("vsnprintf");
return;
}
log_fmt(cat, L"%s", buff.get());
}
} // namespace flog_details