Update ToLower/UpperASCII API

base/strings/string_util.cc

 // Copyright 2013 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.
 
 #include "base/strings/string_util.h"
 
 #include <ctype.h>
 #include <errno.h>
 #include <math.h>
 #include <stdarg.h>
@@ skipping 130 matching lines @@
           // Portable, keep scanning the rest of the format string.
           in_specification = false;
         }
       }
     }
   }
 
   return true;
 }
 
+namespace {
+
+template<typename StringType>
+StringType ToLowerASCIIImpl(BasicStringPiece<StringType> str) {
+  StringType ret;
+  ret.reserve(str.size());
+  for (size_t i = 0; i < str.size(); i++)
+    ret.push_back(ToLowerASCII(str[i]));
+  return ret;
+}
+
+template<typename StringType>
+StringType ToUpperASCIIImpl(BasicStringPiece<StringType> str) {
+  StringType ret;
+  ret.reserve(str.size());
+  for (size_t i = 0; i < str.size(); i++)
+    ret.push_back(ToUpperASCII(str[i]));
+  return ret;
+}
+
+}  // namespace
+
+std::string ToLowerASCII(StringPiece str) {
+  return ToLowerASCIIImpl<std::string>(str);
+}
+
+string16 ToLowerASCII(StringPiece16 str) {
+  return ToLowerASCIIImpl<string16>(str);
+}
+
+std::string ToUpperASCII(StringPiece str) {
+  return ToUpperASCIIImpl<std::string>(str);
+}
+
+string16 ToUpperASCII(StringPiece16 str) {
+  return ToUpperASCIIImpl<string16>(str);
+}
+
 template<class StringType>
 int CompareCaseInsensitiveASCIIT(BasicStringPiece<StringType> a,
                                  BasicStringPiece<StringType> b) {
   // Find the first characters that aren't equal and compare them.  If the end
   // of one of the strings is found before a nonequal character, the lengths
   // of the strings are compared.
   size_t i = 0;
   while (i < a.length() && i < b.length()) {
     typename StringType::value_type lower_a = ToLowerASCII(a[i]);
     typename StringType::value_type lower_b = ToLowerASCII(b[i]);
@@ skipping 836 matching lines @@
 }  // namespace
 
 size_t strlcpy(char* dst, const char* src, size_t dst_size) {
   return lcpyT<char>(dst, src, dst_size);
 }
 size_t wcslcpy(wchar_t* dst, const wchar_t* src, size_t dst_size) {
   return lcpyT<wchar_t>(dst, src, dst_size);
 }
 
 }  // namespace base