| // 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 "base/strings/string_util.h" |
| #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 == '|'; |
| } |
| |
| #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 (!base::IsAsciiAlpha(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_ |