Move googleurl into the Chrome repo.

url/url_canon_fileurl.cc

+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Functions for canonicalizing "file:" URLs.
+
+#include "googleurl/src/url_canon.h"
+#include "googleurl/src/url_canon_internal.h"
+#include "googleurl/src/url_file.h"
+#include "googleurl/src/url_parse_internal.h"
+
+namespace url_canon {
+
+namespace {
+
+#ifdef WIN32
+
+// Given a pointer into the spec, this copies and canonicalizes the drive
+// letter and colon to the output, if one is found. If there is not a drive
+// spec, it won't do anything. The index of the next character in the input
+// spec is returned (after the colon when a drive spec is found, the begin
+// offset if one is not).
+template<typename CHAR>
+int FileDoDriveSpec(const CHAR* spec, int begin, int end,
+                    CanonOutput* output) {
+  // The path could be one of several things: /foo/bar, c:/foo/bar, /c:/foo,
+  // (with backslashes instead of slashes as well).
+  int num_slashes = url_parse::CountConsecutiveSlashes(spec, begin, end);
+  int after_slashes = begin + num_slashes;
+
+  if (!url_parse::DoesBeginWindowsDriveSpec(spec, after_slashes, end))
+    return begin;  // Haven't consumed any characters
+
+  // A drive spec is the start of a path, so we need to add a slash for the
+  // authority terminator (typically the third slash).
+  output->push_back('/');
+
+  // DoesBeginWindowsDriveSpec will ensure that the drive letter is valid
+  // and that it is followed by a colon/pipe.
+
+  // Normalize Windows drive letters to uppercase
+  if (spec[after_slashes] >= 'a' && spec[after_slashes] <= 'z')
+    output->push_back(spec[after_slashes] - 'a' + 'A');
+  else
+    output->push_back(static_cast<char>(spec[after_slashes]));
+
+  // Normalize the character following it to a colon rather than pipe.
+  output->push_back(':');
+  return after_slashes + 2;
+}
+
+#endif  // WIN32
+
+template<typename CHAR, typename UCHAR>
+bool DoFileCanonicalizePath(const CHAR* spec,
+                            const url_parse::Component& path,
+                            CanonOutput* output,
+                            url_parse::Component* out_path) {
+  // Copies and normalizes the "c:" at the beginning, if present.
+  out_path->begin = output->length();
+  int after_drive;
+#ifdef WIN32
+  after_drive = FileDoDriveSpec(spec, path.begin, path.end(), output);
+#else
+  after_drive = path.begin;
+#endif
+
+  // Copies the rest of the path, starting from the slash following the
+  // drive colon (if any, Windows only), or the first slash of the path.
+  bool success = true;
+  if (after_drive < path.end()) {
+    // Use the regular path canonicalizer to canonicalize the rest of the
+    // path. Give it a fake output component to write into. DoCanonicalizeFile
+    // will compute the full path component.
+    url_parse::Component sub_path =
+        url_parse::MakeRange(after_drive, path.end());
+    url_parse::Component fake_output_path;
+    success = CanonicalizePath(spec, sub_path, output, &fake_output_path);
+  } else {
+    // No input path, canonicalize to a slash.
+    output->push_back('/');
+  }
+
+  out_path->len = output->length() - out_path->begin;
+  return success;
+}
+
+template<typename CHAR, typename UCHAR>
+bool DoCanonicalizeFileURL(const URLComponentSource<CHAR>& source,
+                           const url_parse::Parsed& parsed,
+                           CharsetConverter* query_converter,
+                           CanonOutput* output,
+                           url_parse::Parsed* new_parsed) {
+  // Things we don't set in file: URLs.
+  new_parsed->username = url_parse::Component();
+  new_parsed->password = url_parse::Component();
+  new_parsed->port = url_parse::Component();
+
+  // Scheme (known, so we don't bother running it through the more
+  // complicated scheme canonicalizer).
+  new_parsed->scheme.begin = output->length();
+  output->Append("file://", 7);
+  new_parsed->scheme.len = 4;
+
+  // Append the host. For many file URLs, this will be empty. For UNC, this
+  // will be present.
+  // TODO(brettw) This doesn't do any checking for host name validity. We
+  // should probably handle validity checking of UNC hosts differently than
+  // for regular IP hosts.
+  bool success = CanonicalizeHost(source.host, parsed.host,
+                                  output, &new_parsed->host);
+  success &= DoFileCanonicalizePath<CHAR, UCHAR>(source.path, parsed.path,
+                                    output, &new_parsed->path);
+  CanonicalizeQuery(source.query, parsed.query, query_converter,
+                    output, &new_parsed->query);
+
+  // Ignore failure for refs since the URL can probably still be loaded.
+  CanonicalizeRef(source.ref, parsed.ref, output, &new_parsed->ref);
+
+  return success;
+}
+
+} // namespace
+
+bool CanonicalizeFileURL(const char* spec,
+                         int spec_len,
+                         const url_parse::Parsed& parsed,
+                         CharsetConverter* query_converter,
+                         CanonOutput* output,
+                         url_parse::Parsed* new_parsed) {
+  return DoCanonicalizeFileURL<char, unsigned char>(
+      URLComponentSource<char>(spec), parsed, query_converter,
+      output, new_parsed);
+}
+
+bool CanonicalizeFileURL(const char16* spec,
+                         int spec_len,
+                         const url_parse::Parsed& parsed,
+                         CharsetConverter* query_converter,
+                         CanonOutput* output,
+                         url_parse::Parsed* new_parsed) {
+  return DoCanonicalizeFileURL<char16, char16>(
+      URLComponentSource<char16>(spec), parsed, query_converter,
+      output, new_parsed);
+}
+
+bool FileCanonicalizePath(const char* spec,
+                          const url_parse::Component& path,
+                          CanonOutput* output,
+                          url_parse::Component* out_path) {
+  return DoFileCanonicalizePath<char, unsigned char>(spec, path,
+                                                     output, out_path);
+}
+
+bool FileCanonicalizePath(const char16* spec,
+                          const url_parse::Component& path,
+                          CanonOutput* output,
+                          url_parse::Component* out_path) {
+  return DoFileCanonicalizePath<char16, char16>(spec, path,
+                                                output, out_path);
+}
+
+bool ReplaceFileURL(const char* base,
+                    const url_parse::Parsed& base_parsed,
+                    const Replacements<char>& replacements,
+                    CharsetConverter* query_converter,
+                    CanonOutput* output,
+                    url_parse::Parsed* new_parsed) {
+  URLComponentSource<char> source(base);
+  url_parse::Parsed parsed(base_parsed);
+  SetupOverrideComponents(base, replacements, &source, &parsed);
+  return DoCanonicalizeFileURL<char, unsigned char>(
+      source, parsed, query_converter, output, new_parsed);
+}
+
+bool ReplaceFileURL(const char* base,
+                    const url_parse::Parsed& base_parsed,
+                    const Replacements<char16>& replacements,
+                    CharsetConverter* query_converter,
+                    CanonOutput* output,
+                    url_parse::Parsed* new_parsed) {
+  RawCanonOutput<1024> utf8;
+  URLComponentSource<char> source(base);
+  url_parse::Parsed parsed(base_parsed);
+  SetupUTF16OverrideComponents(base, replacements, &utf8, &source, &parsed);
+  return DoCanonicalizeFileURL<char, unsigned char>(
+      source, parsed, query_converter, output, new_parsed);
+}
+
+}  // namespace url_canon