| // 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. |
| |
| #ifndef NET_TOOLS_BALSA_STRING_PIECE_UTILS_H_ |
| #define NET_TOOLS_BALSA_STRING_PIECE_UTILS_H_ |
| |
| #include <ctype.h> |
| |
| #include "base/port.h" |
| #include "base/strings/string_piece.h" |
| |
| namespace net { |
| |
| struct StringPieceCaseHash { |
| size_t operator()(const base::StringPiece& sp) const { |
| // based on __stl_string_hash in http://www.sgi.com/tech/stl/string |
| size_t hash_val = 0; |
| for (base::StringPiece::const_iterator it = sp.begin(); |
| it != sp.end(); ++it) { |
| hash_val = 5 * hash_val + tolower(*it); |
| } |
| return hash_val; |
| } |
| }; |
| |
| struct StringPieceUtils { |
| static bool EqualIgnoreCase(const base::StringPiece& piece1, |
| const base::StringPiece& piece2) { |
| base::StringPiece::const_iterator p1i = piece1.begin(); |
| base::StringPiece::const_iterator p2i = piece2.begin(); |
| if (piece1.empty() && piece2.empty()) { |
| return true; |
| } else if (piece1.size() != piece2.size()) { |
| return false; |
| } |
| while (p1i != piece1.end() && p2i != piece2.end()) { |
| if (tolower(*p1i) != tolower(*p2i)) |
| return false; |
| ++p1i; |
| ++p2i; |
| } |
| return true; |
| } |
| |
| static void RemoveWhitespaceContext(base::StringPiece* piece1) { |
| base::StringPiece::const_iterator c = piece1->begin(); |
| base::StringPiece::const_iterator e = piece1->end(); |
| while (c != e && isspace(*c)) { |
| ++c; |
| } |
| if (c == e) { |
| *piece1 = base::StringPiece(c, e-c); |
| return; |
| } |
| --e; |
| while (c != e &&isspace(*e)) { |
| --e; |
| } |
| ++e; |
| *piece1 = base::StringPiece(c, e-c); |
| } |
| |
| static bool StartsWithIgnoreCase(const base::StringPiece& text, |
| const base::StringPiece& starts_with) { |
| if (text.size() < starts_with.size()) |
| return false; |
| return EqualIgnoreCase(text.substr(0, starts_with.size()), starts_with); |
| } |
| }; |
| struct StringPieceCaseEqual { |
| bool operator()(const base::StringPiece& piece1, |
| const base::StringPiece& piece2) const { |
| return StringPieceUtils::EqualIgnoreCase(piece1, piece2); |
| } |
| }; |
| |
| |
| |
| } // namespace net |
| |
| #endif // NET_TOOLS_BALSA_STRING_PIECE_UTILS_H_ |
| |