lib/icu/Win32: wrappers for WideCharToMultiByte(), MultiByteToWideChar()

Makefile.am

@@ -479,6 +479,11 @@ libicu_a_SOURCES += \
 	src/lib/icu/Init.cxx src/lib/icu/Init.hxx
 endif
 
+if HAVE_WINDOWS
+libicu_a_SOURCES += \
+	src/lib/icu/Win32.cxx src/lib/icu/Win32.hxx
+endif
+
 libicu_a_CPPFLAGS = $(AM_CPPFLAGS) \
 	$(ICU_CFLAGS)
 

src/fs/Charset.cxx

@@ -24,8 +24,10 @@
 #include "Log.hxx"
 #include "lib/icu/Converter.hxx"
 #include "util/Error.hxx"
+#include "util/AllocatedString.hxx"
 
 #ifdef WIN32
+#include "lib/icu/Win32.hxx"
 #include <windows.h>
 #endif
 
@@ -102,22 +104,11 @@ PathToUTF8(PathTraitsFS::const_pointer path_fs)
 #endif
 
 #ifdef WIN32
-	int length = WideCharToMultiByte(CP_UTF8, 0, path_fs, -1, nullptr, 0,
-					 nullptr, nullptr);
-	if (length <= 0)
+	const auto buffer = WideCharToMultiByte(CP_UTF8, path_fs);
+	if (buffer.IsNull())
 		return PathTraitsUTF8::string();
 
-	char *buffer = new char[length];
-	length = WideCharToMultiByte(CP_UTF8, 0, path_fs, -1, buffer, length,
-				     nullptr, nullptr);
-	if (length <= 0) {
-		delete[] buffer;
-		return PathTraitsUTF8::string();
-	}
-
-	PathTraitsUTF8::string result(buffer);
-	delete[] buffer;
-	return FixSeparators(std::move(result));
+	return FixSeparators(PathTraitsUTF8::string(buffer.c_str()));
 #else
 #ifdef HAVE_FS_CHARSET
 	if (fs_converter == nullptr)
@@ -141,22 +132,11 @@ PathFromUTF8(PathTraitsUTF8::const_pointer path_utf8)
 #endif
 
 #ifdef WIN32
-	int length = MultiByteToWideChar(CP_UTF8, 0, path_utf8, -1,
-					 nullptr, 0);
-	if (length <= 0)
+	const auto buffer = MultiByteToWideChar(CP_UTF8, path_utf8);
+	if (buffer.IsNull())
 		return PathTraitsFS::string();
 
-	wchar_t *buffer = new wchar_t[length];
-	length = MultiByteToWideChar(CP_UTF8, 0, path_utf8, -1,
-				     buffer, length);
-	if (length <= 0) {
-		delete[] buffer;
-		return PathTraitsFS::string();
-	}
-
-	PathTraitsFS::string result(buffer);
-	delete[] buffer;
-	return std::move(result);
+	return PathTraitsFS::string(buffer.c_str());
 #else
 	if (fs_converter == nullptr)
 		return path_utf8;

src/lib/icu/Win32.cxx

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2003-2015 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "Win32.hxx"
+#include "util/AllocatedString.hxx"
+
+#include <windows.h>
+
+AllocatedString<char>
+WideCharToMultiByte(unsigned code_page, const wchar_t *src)
+{
+	int length = WideCharToMultiByte(code_page, 0, src, -1, nullptr, 0,
+					 nullptr, nullptr);
+	if (length <= 0)
+		return nullptr;
+
+	char *buffer = new char[length];
+	length = WideCharToMultiByte(code_page, 0, src, -1, buffer, length,
+				     nullptr, nullptr);
+	if (length <= 0) {
+		delete[] buffer;
+		return nullptr;
+	}
+
+	return AllocatedString<char>::Donate(buffer);
+}
+
+AllocatedString<wchar_t>
+MultiByteToWideChar(unsigned code_page, const char *src)
+{
+	int length = MultiByteToWideChar(code_page, 0, src, -1, nullptr, 0);
+	if (length <= 0)
+		return nullptr;
+
+	wchar_t *buffer = new wchar_t[length];
+	length = MultiByteToWideChar(code_page, 0, src, -1, buffer, length);
+	if (length <= 0) {
+		delete[] buffer;
+		return nullptr;
+	}
+
+	return AllocatedString<wchar_t>::Donate(buffer);
+}

src/lib/icu/Win32.hxx

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2003-2015 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_ICU_WIN32_HXX
+#define MPD_ICU_WIN32_HXX
+
+#include "check.h"
+#include "Compiler.h"
+
+#include <wchar.h>
+
+template<typename T> class AllocatedString;
+
+gcc_pure gcc_nonnull_all
+AllocatedString<char>
+WideCharToMultiByte(unsigned code_page, const wchar_t *src);
+
+gcc_pure gcc_nonnull_all
+AllocatedString<wchar_t>
+MultiByteToWideChar(unsigned code_page, const char *src);
+
+#endif