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// 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 <stddef.h>
#include "base/strings/string_piece.h"
#include "base/strings/string_util.h"
namespace net {
#if defined(COMPILER_MSVC)
struct StringPieceCaseCompare {
static const size_t bucket_size = 4;
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 + base::ToLowerASCII(*it);
}
return hash_val;
}
bool operator()(const base::StringPiece& sp1,
const base::StringPiece& sp2) const {
size_t len1 = sp1.length();
size_t len2 = sp2.length();
bool sp1_shorter = len1 < len2;
size_t len = sp1_shorter ? len1 : len2;
int rv = 0;
for (size_t i = 0; i < len; i++) {
char sp1_lower = base::ToLowerASCII(sp1[i]);
char sp2_lower = base::ToLowerASCII(sp2[i]);
if (sp1_lower < sp2_lower) {
rv = -1;
break;
}
if (sp1_lower > sp2_lower) {
rv = 1;
break;
}
}
if (rv == 0) {
return sp1_shorter;
}
return rv < 0;
}
};
#else // COMPILER_MSVC
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 + base::ToLowerASCII(*it);
}
return hash_val;
}
};
#endif // COMPILER_MSVC
struct StringPieceCaseEqual {
bool operator()(const base::StringPiece& piece1,
const base::StringPiece& piece2) const {
return base::EqualsCaseInsensitiveASCII(piece1, piece2);
}
};
} // namespace net
#endif // NET_TOOLS_BALSA_STRING_PIECE_UTILS_H_
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