compat/warn: add qdebug/like macros not dependent on Qt

1 files changed, 68 insertions, 0 deletions

diff --git a/compat/warn.hpp b/compat/warn.hpp
new file mode 100644
index 00000000..9b610d4a
--- /dev/null
+++ b/compat/warn.hpp
@@ -0,0 +1,68 @@
+#pragma once
+
+#include "macros.hpp"
+
+#include <sstream>
+#include <iostream>
+#include <locale>
+#include <utility>
+
+#include <string>
+
+namespace warn_detail {
+template<typename t> using basic_string_stream = std::basic_ostringstream<t, std::char_traits<t>, std::allocator<t>>;
+using string_stream = basic_string_stream<wchar_t>;
+
+force_inline void do_warn(string_stream&) {}
+
+template<typename x, typename... xs>
+force_inline void do_warn(string_stream& acc, const x& datum, const xs&... rest)
+{
+    acc << datum;
+    if (sizeof...(rest) > 0u)
+        acc << L' ';
+    do_warn(acc, rest...);
+}
+
+template<typename... xs>
+never_inline void warn_(const char* file, int line, const char* level, const xs&... seq)
+{
+    using namespace warn_detail;
+    string_stream stream;
+
+    do_warn(stream, seq...);
+
+    std::wcerr << L'[' << level << L' '
+               << file << L':' << line
+               << L"] "
+               << std::boolalpha
+               << stream.str()
+               << L'\n';
+    std::wcerr.flush();
+}
+
+} // ns warn_detail
+
+#define otr_impl_warn_base(level, ...) \
+    (warn_detail::warn_(__FILE__, __LINE__, (level), __VA_ARGS__))
+
+#define warn(...) \
+    otr_impl_warn_base("WARN", __VA_ARGS__)
+
+#define debug(...) \
+    otr_impl_warn_base("DEBUG", __VA_ARGS__)
+
+#define crit(...) \
+    otr_impl_warn_base("CRIT", __VA_ARGS__)
+
+#if 0
+#include <utility>
+
+#define fatal(...)                                  \
+    do                                              \
+    {                                               \
+        otr_impl_warn_base("CRIT", __VA_ARGS__);    \
+        *(volatile int*)0 = 0;                      \
+        std::quick_exit(255);                       \
+    } while (0)
+#endif