UWP L10N #26840
+460
−118
log and format for wstrings.
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commit 805b79b32ca009d7c8afc45a02e155d3f925d86c
| @@ -0,0 +1,22 @@ | ||
| /* This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at https://mozilla.org/MPL/2.0/. */ | ||
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| #pragma once | ||
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| template <typename... Args> | ||
| std::wstring format(const std::wstring &txt, Args... args) { | ||
| size_t size = swprintf(nullptr, 0, txt.c_str(), args...) + 1; | ||
| if (size <= 0) { | ||
| throw std::runtime_error("Error during formatting."); | ||
| } | ||
| auto ptr = new wchar_t[size]; | ||
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| swprintf(ptr, size, txt.c_str(), args...); | ||
| auto wstr = std::wstring(ptr); | ||
| delete ptr; | ||
| return wstr; | ||
| } | ||
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| template <typename... Args> void log(const std::wstring &txt, Args... args) { | ||
| OutputDebugString((format(txt, args...) + L"\r\n").c_str()); | ||
| } | ||
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This looks like we leak this memory every time we call format(). Since the wstring constructor copies the contents of the buffer, we should be able to do this instead: