FCL/sf/mw/qtwebkit: comparison WebCore/platform/LinkHash.cpp

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+:4f2f89ce4247
+/*
+* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+*           (C) 1999 Antti Koivisto (koivisto@kde.org)
+*           (C) 2001 Dirk Mueller (mueller@kde.org)
+*           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
+* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Library General Public
+* License as published by the Free Software Foundation; either
+* version 2 of the License, or (at your option) any later version.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Library General Public License for more details.
+*
+* You should have received a copy of the GNU Library General Public License
+* along with this library; see the file COPYING.LIB.  If not, write to
+* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+* Boston, MA 02110-1301, USA.
+*/
+#include "config.h"
+#include "AtomicString.h"
+#include "KURL.h"
+#include "LinkHash.h"
+#include "PlatformString.h"
+#include "StringHash.h"
+#include "StringImpl.h"
+namespace WebCore {
+static inline int findSlashDotDotSlash(const UChar* characters, size_t length)
+{
+if (length < 4)
+return -1;
+unsigned loopLimit = length - 3;
+for (unsigned i = 0; i < loopLimit; ++i) {
+if (characters[i] == '/' && characters[i + 1] == '.' && characters[i + 2] == '.' && characters[i + 3] == '/')
+return i;
+}
+return -1;
+}
+static inline int findSlashSlash(const UChar* characters, size_t length, int position)
+{
+if (length < 2)
+return -1;
+unsigned loopLimit = length - 1;
+for (unsigned i = position; i < loopLimit; ++i) {
+if (characters[i] == '/' && characters[i + 1] == '/')
+return i;
+}
+return -1;
+}
+static inline int findSlashDotSlash(const UChar* characters, size_t length)
+{
+if (length < 3)
+return -1;
+unsigned loopLimit = length - 2;
+for (unsigned i = 0; i < loopLimit; ++i) {
+if (characters[i] == '/' && characters[i + 1] == '.' && characters[i + 2] == '/')
+return i;
+}
+return -1;
+}
+static inline bool containsColonSlashSlash(const UChar* characters, unsigned length)
+{
+if (length < 3)
+return false;
+unsigned loopLimit = length - 2;
+for (unsigned i = 0; i < loopLimit; ++i) {
+if (characters[i] == ':' && characters[i + 1] == '/' && characters[i + 2] == '/')
+return true;
+}
+return false;
+}
+static inline void cleanPath(Vector<UChar, 512>& path)
+{
+// FIXME: Should not do this in the query or anchor part.
+int pos;
+while ((pos = findSlashDotDotSlash(path.data(), path.size())) != -1) {
+int prev = reverseFind(path.data(), path.size(), '/', pos - 1);
+// don't remove the host, i.e. http://foo.org/../foo.html
+if (prev < 0 || (prev > 3 && path[prev - 2] == ':' && path[prev - 1] == '/'))
+path.remove(pos, 3);
+else
+path.remove(prev, pos - prev + 3);
+}
+// FIXME: Should not do this in the query part.
+// Set refPos to -2 to mean "I haven't looked for the anchor yet".
+// We don't want to waste a function call on the search for the the anchor
+// in the vast majority of cases where there is no "//" in the path.
+pos = 0;
+int refPos = -2;
+while ((pos = findSlashSlash(path.data(), path.size(), pos)) != -1) {
+if (refPos == -2)
+refPos = find(path.data(), path.size(), '#');
+if (refPos > 0 && pos >= refPos)
+break;
+if (pos == 0 || path[pos - 1] != ':')
+path.remove(pos);
+else
+pos += 2;
+}
+// FIXME: Should not do this in the query or anchor part.
+while ((pos = findSlashDotSlash(path.data(), path.size())) != -1)
+path.remove(pos, 2);
+}
+static inline bool matchLetter(UChar c, UChar lowercaseLetter)
+{
+return (c | 0x20) == lowercaseLetter;
+}
+static inline bool needsTrailingSlash(const UChar* characters, unsigned length)
+{
+if (length < 6)
+return false;
+if (!matchLetter(characters[0], 'h')
+|| !matchLetter(characters[1], 't')
+|| !matchLetter(characters[2], 't')
+|| !matchLetter(characters[3], 'p'))
+return false;
+if (!(characters[4] == ':'
+|| (matchLetter(characters[4], 's') && characters[5] == ':')))
+return false;
+unsigned pos = characters[4] == ':' ? 5 : 6;
+// Skip initial two slashes if present.
+if (pos + 1 < length && characters[pos] == '/' && characters[pos + 1] == '/')
+pos += 2;
+// Find next slash.
+while (pos < length && characters[pos] != '/')
+++pos;
+return pos == length;
+}
+static ALWAYS_INLINE LinkHash visitedLinkHashInline(const UChar* url, unsigned length)
+{
+return AlreadyHashed::avoidDeletedValue(StringImpl::computeHash(url, length));
+}
+LinkHash visitedLinkHash(const UChar* url, unsigned length)
+{
+return visitedLinkHashInline(url, length);
+}
+static ALWAYS_INLINE void visitedURLInline(const KURL& base, const AtomicString& attributeURL, Vector<UChar, 512>& buffer)
+{
+if (attributeURL.isNull())
+return;
+const UChar* characters = attributeURL.characters();
+unsigned length = attributeURL.length();
+// This is a poor man's completeURL. Faster with less memory allocation.
+// FIXME: It's missing a lot of what completeURL does and a lot of what KURL does.
+// For example, it does not handle international domain names properly.
+// FIXME: It is wrong that we do not do further processing on strings that have "://" in them:
+//    1) The "://" could be in the query or anchor.
+//    2) The URL's path could have a "/./" or a "/../" or a "//" sequence in it.
+// FIXME: needsTrailingSlash does not properly return true for a URL that has no path, but does
+// have a query or anchor.
+bool hasColonSlashSlash = containsColonSlashSlash(characters, length);
+if (hasColonSlashSlash && !needsTrailingSlash(characters, length)) {
+buffer.append(attributeURL.characters(), attributeURL.length());
+return;
+}
+if (hasColonSlashSlash) {
+// FIXME: This is incorrect for URLs that have a query or anchor; the "/" needs to go at the
+// end of the path, *before* the query or anchor.
+buffer.append(characters, length);
+buffer.append('/');
+return;
+}
+if (!length)
+buffer.append(base.string().characters(), base.string().length());
+else {
+switch (characters[0]) {
+case '/':
+buffer.append(base.string().characters(), base.pathStart());
+break;
+case '#':
+buffer.append(base.string().characters(), base.pathEnd());
+break;
+default:
+buffer.append(base.string().characters(), base.pathAfterLastSlash());
+break;
+}
+}
+buffer.append(characters, length);
+cleanPath(buffer);
+if (needsTrailingSlash(buffer.data(), buffer.size())) {
+// FIXME: This is incorrect for URLs that have a query or anchor; the "/" needs to go at the
+// end of the path, *before* the query or anchor.
+buffer.append('/');
+}
+return;
+}
+void visitedURL(const KURL& base, const AtomicString& attributeURL, Vector<UChar, 512>& buffer)
+{
+return visitedURLInline(base, attributeURL, buffer);
+}
+LinkHash visitedLinkHash(const KURL& base, const AtomicString& attributeURL)
+{
+Vector<UChar, 512> url;
+visitedURLInline(base, attributeURL, url);
+if (url.isEmpty())
+return 0;
+return visitedLinkHashInline(url.data(), url.size());
+}
+}  // namespace WebCore