fixed XArchEvalUnix using wrong memeber, string_format using c++11 (which we're not ready for yet), code style (indentation and new lines)

src/lib/arch/unix/XArchUnix.cpp

@@ -25,8 +25,8 @@
 //
 
 std::string
-XArchEvalUnix::eval() const throw()
+XArchEvalUnix::eval() const
 {
 	// FIXME -- not thread safe
-	return strerror(m_errno);
+	return strerror(m_error);
 }

src/lib/base/String.cpp

@@ -17,7 +17,7 @@
 
 #include "base/String.h"
 
-#include <memory>
+#include <stdio.h>
 #include <cstdarg>
 
 void
@@ -34,32 +34,29 @@ find_replace_all(
 }
 
 CString
-string_format(const CString format, ...)
+string_format(const std::string fmt, ...)
 {
-	// reserve 2 times as much as the length of the format
-    size_t final, n = format.size() * 2;
-
-    CString str;
-    std::unique_ptr<char[]> formatted;
+	int size = 100;
+	std::string str;
 	va_list ap;
 
 	while (true) {
-        
-		// wrap the plain char array in unique_ptr
-		formatted.reset(new char[n]);
-
-        strcpy(&formatted[0], format.c_str());
-        va_start(ap, format);
-        final = vsnprintf(&formatted[0], n, format.c_str(), ap);
+		str.resize(size);
+		va_start(ap, fmt);
+		int n = vsnprintf((char *)str.c_str(), size, fmt.c_str(), ap);
 		va_end(ap);
 
-        if (final < 0 || final >= n) {
-            n += abs(static_cast<int>(final - n + 1));
+		if (n > -1 && n < size) {
+			str.resize(n);
+			return str;
+		}
+		if (n > -1) {
+			size = n + 1;
 		}
 		else {
-            break;
+			size *= 2;
 		}
 	}
 
-    return CString(formatted.get());
+	return str;
 }

src/test/unittests/base/StringTests.cpp

@@ -0,0 +1,42 @@
+/*
+ * synergy -- mouse and keyboard sharing utility
+ * Copyright (C) 2014 Bolton Software Ltd.
+ * 
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file COPYING that should have accompanied this file.
+ * 
+ * This package 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "base/String.h"
+
+#include "test/global/gtest.h"
+
+TEST(CStringTests, find_replace_all)
+{
+	CString subject = "foobar";
+	CString find = "bar";
+	CString replace = "baz";
+
+	find_replace_all(subject, find, replace);
+
+	EXPECT_EQ("foobaz", subject);
+}
+
+TEST(CStringTests, string_format)
+{
+	CString format = "%s=%d";
+	const char* arg1 = "answer";
+	int arg2 = 42;
+
+	CString result = string_format(format, arg1, arg2);
+
+	EXPECT_EQ("answer=42", result);
+}