Add Buf class.

1 files changed, 23 insertions, 22 deletions

diff --git a/c/win.cpp b/c/win.cpp
index ea47fb0..c7ce7ec 100644
--- a/c/win.cpp
+++ b/c/win.cpp
@@ -1,4 +1,5 @@
 #include <utility>
+#include <string>
 #include <SWI-Prolog.h>
 #include <windows.h>
 
@@ -7,28 +8,6 @@
 #include "win.h"
 #include "wcharptr.h"
 
-void ShowException(const wchar_t* const fmt, const wchar_t* const title, const UINT uType) noexcept
-{
-	const wchar_t* what = L"an exception";
-	WcharPtr why;
-
-	try {
-		std::rethrow_exception(std::current_exception());
-        } catch (const term_t& t) {
-		what = L"a Prolog exception";
-		try { why = PlString(t); } catch (...) {}
-	} catch (const Win32Error& e) {
-		what = L"a Windows error";
-		try { why = WcharPtr::Copy(e.What()); } catch (...) {}
-	} catch (const std::exception& e) {
-		try { why = WcharPtr::FromNarrow(e.what()); } catch (...) {}
-	} catch (...) {}
-
-	wchar_t msg[512];
-	Swprintf(msg, fmt, what, static_cast<wchar_t*>(why));
-	EBMessageBox(msg, title, uType);
-}
-
 void WithNextWindow(void (*proc)(HWND))
 {
 	/* WithNextWindow uses a CBT hook to call an arbitrary
@@ -103,6 +82,28 @@ int EBMessageBox(const std::wstring_view text, const std::wstring_view caption,
 	return MessageBox(g_hWnd, text.data(), caption.data(), uType);
 }
 
+void ShowException(const wchar_t* const fmt, const wchar_t* const title, const UINT uType) noexcept
+{
+	const wchar_t* what = L"an exception";
+	WcharPtr why;
+
+	try {
+		std::rethrow_exception(std::current_exception());
+        } catch (const term_t& t) {
+		what = L"a Prolog exception";
+		try { why = PlString(t); } catch (...) {}
+	} catch (const Win32Error& e) {
+		what = L"a Windows error";
+		try { why = WcharPtr::Copy(e.What()); } catch (...) {}
+	} catch (const std::exception& e) {
+		try { why = WcharPtr::FromNarrow(e.what()); } catch (...) {}
+	} catch (...) {}
+
+	std::wstring msg(wcslen(fmt)+wcslen(what)+wcslen(why), 0);
+	Swprintf(msg, fmt, what, static_cast<wchar_t*>(why));
+	EBMessageBox(msg, title, uType);
+}
+
 int GetRelativeCursorPos(const HWND hWnd, POINT* const pt) noexcept
 {
 	RECT rc;