Implemented VLOG() et al.

base/string_util.cc

 // 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.
 
 #include "base/string_util.h"
 
 #include "build/build_config.h"
 
 #include <ctype.h>
 #include <errno.h>
@@ skipping 1095 matching lines @@
 struct NextCharUTF16 {
   base_icu::UChar32 operator()(const char16** p, const char16* end) {
     base_icu::UChar32 c;
     int offset = 0;
     CBU16_NEXT(*p, offset, end - *p, c);
     *p += offset;
     return c;
   }
 };
 
-bool MatchPattern(const std::string& eval, const std::string& pattern) {
-  return MatchPatternT(eval.c_str(), eval.c_str() + eval.size(),
-                       pattern.c_str(), pattern.c_str() + pattern.size(),
+bool MatchPattern(const base::StringPiece& eval,
+                  const base::StringPiece& pattern) {
+  return MatchPatternT(eval.data(), eval.data() + eval.size(),
+                       pattern.data(), pattern.data() + pattern.size(),
                        0, NextCharUTF8());
 }
 
 bool MatchPattern(const string16& eval, const string16& pattern) {
   return MatchPatternT(eval.c_str(), eval.c_str() + eval.size(),
                        pattern.c_str(), pattern.c_str() + pattern.size(),
                        0, NextCharUTF16());
 }
 
 // The following code is compatible with the OpenBSD lcpy interface.  See:
@@ skipping 56 matching lines @@
       int rstr_len = (max_len - 3) / 2;
       int lstr_len = rstr_len + ((max_len - 3) % 2);
       output->assign(input.substr(0, lstr_len) + L"..." +
                      input.substr(input.length() - rstr_len));
       break;
     }
   }
 
   return true;
 }