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82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
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// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef URL_URL_FILE_H_
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#define URL_URL_FILE_H_
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// Provides shared functions used by the internals of the parser and
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// canonicalizer for file URLs. Do not use outside of these modules.
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#include "base/strings/string_util.h"
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#include "url/url_parse_internal.h"
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namespace url {
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#ifdef WIN32
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// We allow both "c:" and "c|" as drive identifiers.
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inline bool IsWindowsDriveSeparator(base::char16 ch) {
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return ch == ':' || ch == '|';
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}
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#endif // WIN32
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// Returns the index of the next slash in the input after the given index, or
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// spec_len if the end of the input is reached.
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template<typename CHAR>
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inline int FindNextSlash(const CHAR* spec, int begin_index, int spec_len) {
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int idx = begin_index;
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while (idx < spec_len && !IsURLSlash(spec[idx]))
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idx++;
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return idx;
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}
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#ifdef WIN32
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// Returns true if the start_offset in the given spec looks like it begins a
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// drive spec, for example "c:". This function explicitly handles start_offset
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// values that are equal to or larger than the spec_len to simplify callers.
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//
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// If this returns true, the spec is guaranteed to have a valid drive letter
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// plus a colon starting at |start_offset|.
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template<typename CHAR>
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inline bool DoesBeginWindowsDriveSpec(const CHAR* spec, int start_offset,
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int spec_len) {
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int remaining_len = spec_len - start_offset;
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if (remaining_len < 2)
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return false; // Not enough room.
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if (!base::IsAsciiAlpha(spec[start_offset]))
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return false; // Doesn't start with a valid drive letter.
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if (!IsWindowsDriveSeparator(spec[start_offset + 1]))
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return false; // Isn't followed with a drive separator.
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return true;
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}
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// Returns true if the start_offset in the given text looks like it begins a
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// UNC path, for example "\\". This function explicitly handles start_offset
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// values that are equal to or larger than the spec_len to simplify callers.
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//
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// When strict_slashes is set, this function will only accept backslashes as is
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// standard for Windows. Otherwise, it will accept forward slashes as well
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// which we use for a lot of URL handling.
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template<typename CHAR>
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inline bool DoesBeginUNCPath(const CHAR* text,
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int start_offset,
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int len,
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bool strict_slashes) {
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int remaining_len = len - start_offset;
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if (remaining_len < 2)
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return false;
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if (strict_slashes)
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return text[start_offset] == '\\' && text[start_offset + 1] == '\\';
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return IsURLSlash(text[start_offset]) && IsURLSlash(text[start_offset + 1]);
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}
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#endif // WIN32
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} // namespace url
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#endif // URL_URL_FILE_H_
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