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