Move StringPrintf into its own file and use the base namespace. Currently this has using

directives for the functions so I don't have to change all files to use the namespace.

No code changes to logic.

TEST=it compiles + the included unit tests
BUG=none
Review URL: http://codereview.chromium.org/3181016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@56299 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 56 insertions, 0 deletions

diff --git a/base/stringprintf.h b/base/stringprintf.h
new file mode 100644
index 0000000..43d60d4
--- /dev/null
+++ b/base/stringprintf.h
@@ -0,0 +1,56 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_STRINGPRINTF_H_
+#define BASE_STRINGPRINTF_H_
+
+#include <stdarg.h>   // va_list
+
+#include <string>
+
+#include "base/compiler_specific.h"
+
+namespace base {
+
+// Return a C++ string given printf-like input.
+std::string StringPrintf(const char* format, ...) PRINTF_FORMAT(1, 2);
+std::wstring StringPrintf(const wchar_t* format, ...) WPRINTF_FORMAT(1, 2);
+
+// Return a C++ string given vprintf-like input.
+std::string StringPrintV(const char* format, va_list ap) PRINTF_FORMAT(1, 0);
+
+// Store result into a supplied string and return it.
+const std::string& SStringPrintf(std::string* dst, const char* format, ...)
+    PRINTF_FORMAT(2, 3);
+const std::wstring& SStringPrintf(std::wstring* dst,
+                                  const wchar_t* format, ...)
+    WPRINTF_FORMAT(2, 3);
+
+// Append result to a supplied string.
+void StringAppendF(std::string* dst, const char* format, ...)
+    PRINTF_FORMAT(2, 3);
+void StringAppendF(std::wstring* dst, const wchar_t* format, ...)
+    WPRINTF_FORMAT(2, 3);
+
+// Lower-level routine that takes a va_list and appends to a specified
+// string.  All other routines are just convenience wrappers around it.
+void StringAppendV(std::string* dst, const char* format, va_list ap)
+    PRINTF_FORMAT(2, 0);
+void StringAppendV(std::wstring* dst, const wchar_t* format, va_list ap)
+    WPRINTF_FORMAT(2, 0);
+
+}  // namespace base
+
+// Don't require the namespace for legacy code. New code should use "base::" or
+// have its own using decl.
+//
+// TODO(brettw) remove these when calling code is converted.
+using base::StringPrintf;
+using base::StringPrintV;
+using base::SStringPrintf;
+using base::StringAppendV;
+using base::StringAppendF;
+using base::StringAppendV;
+
+#endif  // BASE_STRINGPRINTF_H_