file_path.cc revision c7f5f8508d98d5952d42ed7648c2a8f30a4da156 
1// Copyright (c) 2010 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/file_path.h"
6
7#if defined(OS_MACOSX)
8#include <CoreServices/CoreServices.h>
9#endif
10
11#include "base/logging.h"
12#include "base/pickle.h"
13
14// These includes are just for the *Hack functions, and should be removed
15// when those functions are removed.
16#include "base/string_piece.h"
17#include "base/string_util.h"
18#include "base/sys_string_conversions.h"
19
20#if defined(OS_MACOSX)
21#include "base/scoped_cftyperef.h"
22#include "base/third_party/icu/icu_utf.h"
23#endif
24#if defined(OS_WIN)
25#include "base/win_util.h"
26#endif
27
28#if defined(FILE_PATH_USES_WIN_SEPARATORS)
29const FilePath::CharType FilePath::kSeparators[] = FILE_PATH_LITERAL("\\/");
30#else  // FILE_PATH_USES_WIN_SEPARATORS
31const FilePath::CharType FilePath::kSeparators[] = FILE_PATH_LITERAL("/");
32#endif  // FILE_PATH_USES_WIN_SEPARATORS
33
34const FilePath::CharType FilePath::kCurrentDirectory[] = FILE_PATH_LITERAL(".");
35const FilePath::CharType FilePath::kParentDirectory[] = FILE_PATH_LITERAL("..");
36
37const FilePath::CharType FilePath::kExtensionSeparator = FILE_PATH_LITERAL('.');
38
39
40namespace {
41
42// If this FilePath contains a drive letter specification, returns the
43// position of the last character of the drive letter specification,
44// otherwise returns npos.  This can only be true on Windows, when a pathname
45// begins with a letter followed by a colon.  On other platforms, this always
46// returns npos.
47FilePath::StringType::size_type FindDriveLetter(
48    const FilePath::StringType& path) {
49#if defined(FILE_PATH_USES_DRIVE_LETTERS)
50  // This is dependent on an ASCII-based character set, but that's a
51  // reasonable assumption.  iswalpha can be too inclusive here.
52  if (path.length() >= 2 && path[1] == L':' &&
53      ((path[0] >= L'A' && path[0] <= L'Z') ||
54       (path[0] >= L'a' && path[0] <= L'z'))) {
55    return 1;
56  }
57#endif  // FILE_PATH_USES_DRIVE_LETTERS
58  return FilePath::StringType::npos;
59}
60
61
62#if defined(FILE_PATH_USES_DRIVE_LETTERS)
63bool EqualDriveLetterCaseInsensitive(const FilePath::StringType a,
64                                     const FilePath::StringType b) {
65  size_t a_letter_pos = FindDriveLetter(a);
66  size_t b_letter_pos = FindDriveLetter(b);
67
68  if ((a_letter_pos == FilePath::StringType::npos) ||
69      (b_letter_pos == FilePath::StringType::npos))
70    return a == b;
71
72  FilePath::StringType a_letter(a.substr(0, a_letter_pos + 1));
73  FilePath::StringType b_letter(b.substr(0, b_letter_pos + 1));
74  if (!StartsWith(a_letter, b_letter, false))
75    return false;
76
77  FilePath::StringType a_rest(a.substr(a_letter_pos + 1));
78  FilePath::StringType b_rest(b.substr(b_letter_pos + 1));
79  return a_rest == b_rest;
80}
81#endif  // defined(FILE_PATH_USES_DRIVE_LETTERS)
82
83bool IsPathAbsolute(const FilePath::StringType& path) {
84#if defined(FILE_PATH_USES_DRIVE_LETTERS)
85  FilePath::StringType::size_type letter = FindDriveLetter(path);
86  if (letter != FilePath::StringType::npos) {
87    // Look for a separator right after the drive specification.
88    return path.length() > letter + 1 &&
89        FilePath::IsSeparator(path[letter + 1]);
90  }
91  // Look for a pair of leading separators.
92  return path.length() > 1 &&
93      FilePath::IsSeparator(path[0]) && FilePath::IsSeparator(path[1]);
94#else  // FILE_PATH_USES_DRIVE_LETTERS
95  // Look for a separator in the first position.
96  return path.length() > 0 && FilePath::IsSeparator(path[0]);
97#endif  // FILE_PATH_USES_DRIVE_LETTERS
98}
99
100bool AreAllSeparators(const FilePath::StringType& input) {
101  for (FilePath::StringType::const_iterator it = input.begin();
102      it != input.end(); ++it) {
103    if (!FilePath::IsSeparator(*it))
104      return false;
105  }
106
107  return true;
108}
109
110}  // namespace
111
112bool FilePath::IsSeparator(CharType character) {
113  for (size_t i = 0; i < arraysize(kSeparators) - 1; ++i) {
114    if (character == kSeparators[i]) {
115      return true;
116    }
117  }
118
119  return false;
120}
121
122void FilePath::GetComponents(std::vector<FilePath::StringType>* components)
123    const {
124  DCHECK(components);
125  if (!components)
126    return;
127  components->clear();
128  if (value().empty())
129    return;
130
131  std::vector<FilePath::StringType> ret_val;
132  FilePath current = *this;
133  FilePath base;
134
135  // Capture path components.
136  while (current != current.DirName()) {
137    base = current.BaseName();
138    if (!AreAllSeparators(base.value()))
139      ret_val.push_back(base.value());
140    current = current.DirName();
141  }
142
143  // Capture root, if any.
144  base = current.BaseName();
145  if (!base.value().empty() && base.value() != kCurrentDirectory)
146    ret_val.push_back(current.BaseName().value());
147
148  // Capture drive letter, if any.
149  FilePath dir = current.DirName();
150  StringType::size_type letter = FindDriveLetter(dir.value());
151  if (letter != FilePath::StringType::npos) {
152    ret_val.push_back(FilePath::StringType(dir.value(), 0, letter + 1));
153  }
154
155  *components = std::vector<FilePath::StringType>(ret_val.rbegin(),
156                                                  ret_val.rend());
157}
158
159bool FilePath::operator==(const FilePath& that) const {
160#if defined(FILE_PATH_USES_DRIVE_LETTERS)
161  return EqualDriveLetterCaseInsensitive(this->path_, that.path_);
162#else  // defined(FILE_PATH_USES_DRIVE_LETTERS)
163  return path_ == that.path_;
164#endif  // defined(FILE_PATH_USES_DRIVE_LETTERS)
165}
166
167bool FilePath::operator!=(const FilePath& that) const {
168#if defined(FILE_PATH_USES_DRIVE_LETTERS)
169  return !EqualDriveLetterCaseInsensitive(this->path_, that.path_);
170#else  // defined(FILE_PATH_USES_DRIVE_LETTERS)
171  return path_ != that.path_;
172#endif  // defined(FILE_PATH_USES_DRIVE_LETTERS)
173}
174
175bool FilePath::IsParent(const FilePath& child) const {
176  return AppendRelativePath(child, NULL);
177}
178
179bool FilePath::AppendRelativePath(const FilePath& child,
180                                  FilePath* path) const {
181  std::vector<FilePath::StringType> parent_components;
182  std::vector<FilePath::StringType> child_components;
183  GetComponents(&parent_components);
184  child.GetComponents(&child_components);
185
186  if (parent_components.size() >= child_components.size())
187    return false;
188  if (parent_components.size() == 0)
189    return false;
190
191  std::vector<FilePath::StringType>::const_iterator parent_comp =
192      parent_components.begin();
193  std::vector<FilePath::StringType>::const_iterator child_comp =
194      child_components.begin();
195
196#if defined(FILE_PATH_USES_DRIVE_LETTERS)
197  // Windows can access case sensitive filesystems, so component
198  // comparisions must be case sensitive, but drive letters are
199  // never case sensitive.
200  if ((FindDriveLetter(*parent_comp) != FilePath::StringType::npos) &&
201      (FindDriveLetter(*child_comp) != FilePath::StringType::npos)) {
202    if (!StartsWith(*parent_comp, *child_comp, false))
203      return false;
204    ++parent_comp;
205    ++child_comp;
206  }
207#endif  // defined(FILE_PATH_USES_DRIVE_LETTERS)
208
209  while (parent_comp != parent_components.end()) {
210    if (*parent_comp != *child_comp)
211      return false;
212    ++parent_comp;
213    ++child_comp;
214  }
215
216  if (path != NULL) {
217    for (; child_comp != child_components.end(); ++child_comp) {
218      *path = path->Append(*child_comp);
219    }
220  }
221  return true;
222}
223
224// libgen's dirname and basename aren't guaranteed to be thread-safe and aren't
225// guaranteed to not modify their input strings, and in fact are implemented
226// differently in this regard on different platforms.  Don't use them, but
227// adhere to their behavior.
228FilePath FilePath::DirName() const {
229  FilePath new_path(path_);
230  new_path.StripTrailingSeparatorsInternal();
231
232  // The drive letter, if any, always needs to remain in the output.  If there
233  // is no drive letter, as will always be the case on platforms which do not
234  // support drive letters, letter will be npos, or -1, so the comparisons and
235  // resizes below using letter will still be valid.
236  StringType::size_type letter = FindDriveLetter(new_path.path_);
237
238  StringType::size_type last_separator =
239      new_path.path_.find_last_of(kSeparators, StringType::npos,
240                                  arraysize(kSeparators) - 1);
241  if (last_separator == StringType::npos) {
242    // path_ is in the current directory.
243    new_path.path_.resize(letter + 1);
244  } else if (last_separator == letter + 1) {
245    // path_ is in the root directory.
246    new_path.path_.resize(letter + 2);
247  } else if (last_separator == letter + 2 &&
248             IsSeparator(new_path.path_[letter + 1])) {
249    // path_ is in "//" (possibly with a drive letter); leave the double
250    // separator intact indicating alternate root.
251    new_path.path_.resize(letter + 3);
252  } else if (last_separator != 0) {
253    // path_ is somewhere else, trim the basename.
254    new_path.path_.resize(last_separator);
255  }
256
257  new_path.StripTrailingSeparatorsInternal();
258  if (!new_path.path_.length())
259    new_path.path_ = kCurrentDirectory;
260
261  return new_path;
262}
263
264FilePath FilePath::BaseName() const {
265  FilePath new_path(path_);
266  new_path.StripTrailingSeparatorsInternal();
267
268  // The drive letter, if any, is always stripped.
269  StringType::size_type letter = FindDriveLetter(new_path.path_);
270  if (letter != StringType::npos) {
271    new_path.path_.erase(0, letter + 1);
272  }
273
274  // Keep everything after the final separator, but if the pathname is only
275  // one character and it's a separator, leave it alone.
276  StringType::size_type last_separator =
277      new_path.path_.find_last_of(kSeparators, StringType::npos,
278                                  arraysize(kSeparators) - 1);
279  if (last_separator != StringType::npos &&
280      last_separator < new_path.path_.length() - 1) {
281    new_path.path_.erase(0, last_separator + 1);
282  }
283
284  return new_path;
285}
286
287FilePath::StringType FilePath::Extension() const {
288  // BaseName() calls StripTrailingSeparators, so cases like /foo.baz/// work.
289  StringType base = BaseName().value();
290
291  // Special case "." and ".."
292  if (base == kCurrentDirectory || base == kParentDirectory)
293    return StringType();
294
295  const StringType::size_type last_dot = base.rfind(kExtensionSeparator);
296  if (last_dot == StringType::npos)
297    return StringType();
298  return StringType(base, last_dot);
299}
300
301FilePath FilePath::RemoveExtension() const {
302  StringType ext = Extension();
303  // It's important to check Extension() since that verifies that the
304  // kExtensionSeparator actually appeared in the last path component.
305  if (ext.empty())
306    return FilePath(path_);
307  // Since Extension() verified that the extension is in fact in the last path
308  // component, this substr will effectively strip trailing separators.
309  const StringType::size_type last_dot = path_.rfind(kExtensionSeparator);
310  return FilePath(path_.substr(0, last_dot));
311}
312
313FilePath FilePath::InsertBeforeExtension(const StringType& suffix) const {
314  if (suffix.empty())
315    return FilePath(path_);
316
317  if (path_.empty())
318    return FilePath();
319
320  StringType base = BaseName().value();
321  if (base.empty())
322    return FilePath();
323  if (*(base.end() - 1) == kExtensionSeparator) {
324    // Special case "." and ".."
325    if (base == kCurrentDirectory || base == kParentDirectory) {
326      return FilePath();
327    }
328  }
329
330  StringType ext = Extension();
331  StringType ret = RemoveExtension().value();
332  ret.append(suffix);
333  ret.append(ext);
334  return FilePath(ret);
335}
336
337FilePath FilePath::InsertBeforeExtensionASCII(const base::StringPiece& suffix)
338    const {
339  DCHECK(IsStringASCII(suffix));
340#if defined(OS_WIN)
341  return InsertBeforeExtension(ASCIIToWide(suffix));
342#elif defined(OS_POSIX)
343  return InsertBeforeExtension(suffix.as_string());
344#endif
345}
346
347FilePath FilePath::ReplaceExtension(const StringType& extension) const {
348  if (path_.empty())
349    return FilePath();
350
351  StringType base = BaseName().value();
352  if (base.empty())
353    return FilePath();
354  if (*(base.end() - 1) == kExtensionSeparator) {
355    // Special case "." and ".."
356    if (base == kCurrentDirectory || base == kParentDirectory) {
357      return FilePath();
358    }
359  }
360
361  FilePath no_ext = RemoveExtension();
362  // If the new extension is "" or ".", then just remove the current extension.
363  if (extension.empty() || extension == StringType(1, kExtensionSeparator))
364    return no_ext;
365
366  StringType str = no_ext.value();
367  if (extension[0] != kExtensionSeparator)
368    str.append(1, kExtensionSeparator);
369  str.append(extension);
370  return FilePath(str);
371}
372
373bool FilePath::MatchesExtension(const StringType& extension) const {
374  DCHECK(extension.empty() || extension[0] == kExtensionSeparator);
375
376  FilePath::StringType current_extension = Extension();
377
378  if (current_extension.length() != extension.length())
379    return false;
380
381  return FilePath::CompareEqualIgnoreCase(extension, current_extension);
382}
383
384FilePath FilePath::Append(const StringType& component) const {
385  DCHECK(!IsPathAbsolute(component));
386  if (path_.compare(kCurrentDirectory) == 0) {
387    // Append normally doesn't do any normalization, but as a special case,
388    // when appending to kCurrentDirectory, just return a new path for the
389    // component argument.  Appending component to kCurrentDirectory would
390    // serve no purpose other than needlessly lengthening the path, and
391    // it's likely in practice to wind up with FilePath objects containing
392    // only kCurrentDirectory when calling DirName on a single relative path
393    // component.
394    return FilePath(component);
395  }
396
397  FilePath new_path(path_);
398  new_path.StripTrailingSeparatorsInternal();
399
400  // Don't append a separator if the path is empty (indicating the current
401  // directory) or if the path component is empty (indicating nothing to
402  // append).
403  if (component.length() > 0 && new_path.path_.length() > 0) {
404    // Don't append a separator if the path still ends with a trailing
405    // separator after stripping (indicating the root directory).
406    if (!IsSeparator(new_path.path_[new_path.path_.length() - 1])) {
407      // Don't append a separator if the path is just a drive letter.
408      if (FindDriveLetter(new_path.path_) + 1 != new_path.path_.length()) {
409        new_path.path_.append(1, kSeparators[0]);
410      }
411    }
412  }
413
414  new_path.path_.append(component);
415  return new_path;
416}
417
418FilePath FilePath::Append(const FilePath& component) const {
419  return Append(component.value());
420}
421
422FilePath FilePath::AppendASCII(const base::StringPiece& component) const {
423  DCHECK(IsStringASCII(component));
424#if defined(OS_WIN)
425  return Append(ASCIIToWide(component));
426#elif defined(OS_POSIX)
427  return Append(component.as_string());
428#endif
429}
430
431bool FilePath::IsAbsolute() const {
432  return IsPathAbsolute(path_);
433}
434
435#if defined(OS_WIN)
436// Windows specific implementation of file string comparisons
437
438int FilePath::CompareIgnoreCase(const StringType& string1,
439                                const StringType& string2) {
440  // Perform character-wise upper case comparison rather than using the
441  // fully Unicode-aware CompareString(). For details see:
442  // http://blogs.msdn.com/michkap/archive/2005/10/17/481600.aspx
443  StringType::const_iterator i1 = string1.begin();
444  StringType::const_iterator i2 = string2.begin();
445  StringType::const_iterator string1end = string1.end();
446  StringType::const_iterator string2end = string2.end();
447  for ( ; i1 != string1end && i2 != string2end; ++i1, ++i2) {
448    wchar_t c1 = (wchar_t)LOWORD(::CharUpperW((LPWSTR)MAKELONG(*i1, 0)));
449    wchar_t c2 = (wchar_t)LOWORD(::CharUpperW((LPWSTR)MAKELONG(*i2, 0)));
450    if (c1 < c2)
451      return -1;
452    if (c1 > c2)
453      return 1;
454  }
455  if (i1 != string1end)
456    return 1;
457  if (i2 != string2end)
458    return -1;
459  return 0;
460}
461
462#elif defined(OS_MACOSX)
463// Mac OS X specific implementation of file string comparisons
464
465// cf. http://developer.apple.com/mac/library/technotes/tn/tn1150.html#UnicodeSubtleties
466//
467// "When using CreateTextEncoding to create a text encoding, you should set
468// the TextEncodingBase to kTextEncodingUnicodeV2_0, set the
469// TextEncodingVariant to kUnicodeCanonicalDecompVariant, and set the
470// TextEncodingFormat to kUnicode16BitFormat. Using these values ensures that
471// the Unicode will be in the same form as on an HFS Plus volume, even as the
472// Unicode standard evolves."
473//
474// Another technical article for X 10.4 updates this: one should use
475// the new (unambiguous) kUnicodeHFSPlusDecompVariant.
476// cf. http://developer.apple.com/mac/library/releasenotes/TextFonts/RN-TEC/index.html
477//
478// This implementation uses CFStringGetFileSystemRepresentation() to get the
479// decomposed form, and an adapted version of the FastUnicodeCompare as
480// described in the tech note to compare the strings.
481
482// Character conversion table for FastUnicodeCompare()
483//
484// The lower case table consists of a 256-entry high-byte table followed by
485// some number of 256-entry subtables. The high-byte table contains either an
486// offset to the subtable for characters with that high byte or zero, which
487// means that there are no case mappings or ignored characters in that block.
488// Ignored characters are mapped to zero.
489//
490// cf. downloadable file linked in
491// http://developer.apple.com/mac/library/technotes/tn/tn1150.html#StringComparisonAlgorithm
492
493namespace {
494
495const UInt16 lower_case_table[] = {
496  // High-byte indices ( == 0 iff no case mapping and no ignorables )
497
498  /* 0 */ 0x0100, 0x0200, 0x0000, 0x0300, 0x0400, 0x0500, 0x0000, 0x0000,
499          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
500  /* 1 */ 0x0600, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
501          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
502  /* 2 */ 0x0700, 0x0800, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
503          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
504  /* 3 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
505          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
506  /* 4 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
507          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
508  /* 5 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
509          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
510  /* 6 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
511          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
512  /* 7 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
513          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
514  /* 8 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
515          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
516  /* 9 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
517          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
518  /* A */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
519          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
520  /* B */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
521          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
522  /* C */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
523          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
524  /* D */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
525          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
526  /* E */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
527          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
528  /* F */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
529          0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0900, 0x0A00,
530
531  // Table 1 (for high byte 0x00)
532
533  /* 0 */ 0xFFFF, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
534          0x0008, 0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x000E, 0x000F,
535  /* 1 */ 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
536          0x0018, 0x0019, 0x001A, 0x001B, 0x001C, 0x001D, 0x001E, 0x001F,
537  /* 2 */ 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
538          0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F,
539  /* 3 */ 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
540          0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E, 0x003F,
541  /* 4 */ 0x0040, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
542          0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F,
543  /* 5 */ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
544          0x0078, 0x0079, 0x007A, 0x005B, 0x005C, 0x005D, 0x005E, 0x005F,
545  /* 6 */ 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
546          0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F,
547  /* 7 */ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
548          0x0078, 0x0079, 0x007A, 0x007B, 0x007C, 0x007D, 0x007E, 0x007F,
549  /* 8 */ 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
550          0x0088, 0x0089, 0x008A, 0x008B, 0x008C, 0x008D, 0x008E, 0x008F,
551  /* 9 */ 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
552          0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F,
553  /* A */ 0x00A0, 0x00A1, 0x00A2, 0x00A3, 0x00A4, 0x00A5, 0x00A6, 0x00A7,
554          0x00A8, 0x00A9, 0x00AA, 0x00AB, 0x00AC, 0x00AD, 0x00AE, 0x00AF,
555  /* B */ 0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7,
556          0x00B8, 0x00B9, 0x00BA, 0x00BB, 0x00BC, 0x00BD, 0x00BE, 0x00BF,
557  /* C */ 0x00C0, 0x00C1, 0x00C2, 0x00C3, 0x00C4, 0x00C5, 0x00E6, 0x00C7,
558          0x00C8, 0x00C9, 0x00CA, 0x00CB, 0x00CC, 0x00CD, 0x00CE, 0x00CF,
559  /* D */ 0x00F0, 0x00D1, 0x00D2, 0x00D3, 0x00D4, 0x00D5, 0x00D6, 0x00D7,
560          0x00F8, 0x00D9, 0x00DA, 0x00DB, 0x00DC, 0x00DD, 0x00FE, 0x00DF,
561  /* E */ 0x00E0, 0x00E1, 0x00E2, 0x00E3, 0x00E4, 0x00E5, 0x00E6, 0x00E7,
562          0x00E8, 0x00E9, 0x00EA, 0x00EB, 0x00EC, 0x00ED, 0x00EE, 0x00EF,
563  /* F */ 0x00F0, 0x00F1, 0x00F2, 0x00F3, 0x00F4, 0x00F5, 0x00F6, 0x00F7,
564          0x00F8, 0x00F9, 0x00FA, 0x00FB, 0x00FC, 0x00FD, 0x00FE, 0x00FF,
565
566  // Table 2 (for high byte 0x01)
567
568  /* 0 */ 0x0100, 0x0101, 0x0102, 0x0103, 0x0104, 0x0105, 0x0106, 0x0107,
569          0x0108, 0x0109, 0x010A, 0x010B, 0x010C, 0x010D, 0x010E, 0x010F,
570  /* 1 */ 0x0111, 0x0111, 0x0112, 0x0113, 0x0114, 0x0115, 0x0116, 0x0117,
571          0x0118, 0x0119, 0x011A, 0x011B, 0x011C, 0x011D, 0x011E, 0x011F,
572  /* 2 */ 0x0120, 0x0121, 0x0122, 0x0123, 0x0124, 0x0125, 0x0127, 0x0127,
573          0x0128, 0x0129, 0x012A, 0x012B, 0x012C, 0x012D, 0x012E, 0x012F,
574  /* 3 */ 0x0130, 0x0131, 0x0133, 0x0133, 0x0134, 0x0135, 0x0136, 0x0137,
575          0x0138, 0x0139, 0x013A, 0x013B, 0x013C, 0x013D, 0x013E, 0x0140,
576  /* 4 */ 0x0140, 0x0142, 0x0142, 0x0143, 0x0144, 0x0145, 0x0146, 0x0147,
577          0x0148, 0x0149, 0x014B, 0x014B, 0x014C, 0x014D, 0x014E, 0x014F,
578  /* 5 */ 0x0150, 0x0151, 0x0153, 0x0153, 0x0154, 0x0155, 0x0156, 0x0157,
579          0x0158, 0x0159, 0x015A, 0x015B, 0x015C, 0x015D, 0x015E, 0x015F,
580  /* 6 */ 0x0160, 0x0161, 0x0162, 0x0163, 0x0164, 0x0165, 0x0167, 0x0167,
581          0x0168, 0x0169, 0x016A, 0x016B, 0x016C, 0x016D, 0x016E, 0x016F,
582  /* 7 */ 0x0170, 0x0171, 0x0172, 0x0173, 0x0174, 0x0175, 0x0176, 0x0177,
583          0x0178, 0x0179, 0x017A, 0x017B, 0x017C, 0x017D, 0x017E, 0x017F,
584  /* 8 */ 0x0180, 0x0253, 0x0183, 0x0183, 0x0185, 0x0185, 0x0254, 0x0188,
585          0x0188, 0x0256, 0x0257, 0x018C, 0x018C, 0x018D, 0x01DD, 0x0259,
586  /* 9 */ 0x025B, 0x0192, 0x0192, 0x0260, 0x0263, 0x0195, 0x0269, 0x0268,
587          0x0199, 0x0199, 0x019A, 0x019B, 0x026F, 0x0272, 0x019E, 0x0275,
588  /* A */ 0x01A0, 0x01A1, 0x01A3, 0x01A3, 0x01A5, 0x01A5, 0x01A6, 0x01A8,
589          0x01A8, 0x0283, 0x01AA, 0x01AB, 0x01AD, 0x01AD, 0x0288, 0x01AF,
590  /* B */ 0x01B0, 0x028A, 0x028B, 0x01B4, 0x01B4, 0x01B6, 0x01B6, 0x0292,
591          0x01B9, 0x01B9, 0x01BA, 0x01BB, 0x01BD, 0x01BD, 0x01BE, 0x01BF,
592  /* C */ 0x01C0, 0x01C1, 0x01C2, 0x01C3, 0x01C6, 0x01C6, 0x01C6, 0x01C9,
593          0x01C9, 0x01C9, 0x01CC, 0x01CC, 0x01CC, 0x01CD, 0x01CE, 0x01CF,
594  /* D */ 0x01D0, 0x01D1, 0x01D2, 0x01D3, 0x01D4, 0x01D5, 0x01D6, 0x01D7,
595          0x01D8, 0x01D9, 0x01DA, 0x01DB, 0x01DC, 0x01DD, 0x01DE, 0x01DF,
596  /* E */ 0x01E0, 0x01E1, 0x01E2, 0x01E3, 0x01E5, 0x01E5, 0x01E6, 0x01E7,
597          0x01E8, 0x01E9, 0x01EA, 0x01EB, 0x01EC, 0x01ED, 0x01EE, 0x01EF,
598  /* F */ 0x01F0, 0x01F3, 0x01F3, 0x01F3, 0x01F4, 0x01F5, 0x01F6, 0x01F7,
599          0x01F8, 0x01F9, 0x01FA, 0x01FB, 0x01FC, 0x01FD, 0x01FE, 0x01FF,
600
601  // Table 3 (for high byte 0x03)
602
603  /* 0 */ 0x0300, 0x0301, 0x0302, 0x0303, 0x0304, 0x0305, 0x0306, 0x0307,
604          0x0308, 0x0309, 0x030A, 0x030B, 0x030C, 0x030D, 0x030E, 0x030F,
605  /* 1 */ 0x0310, 0x0311, 0x0312, 0x0313, 0x0314, 0x0315, 0x0316, 0x0317,
606          0x0318, 0x0319, 0x031A, 0x031B, 0x031C, 0x031D, 0x031E, 0x031F,
607  /* 2 */ 0x0320, 0x0321, 0x0322, 0x0323, 0x0324, 0x0325, 0x0326, 0x0327,
608          0x0328, 0x0329, 0x032A, 0x032B, 0x032C, 0x032D, 0x032E, 0x032F,
609  /* 3 */ 0x0330, 0x0331, 0x0332, 0x0333, 0x0334, 0x0335, 0x0336, 0x0337,
610          0x0338, 0x0339, 0x033A, 0x033B, 0x033C, 0x033D, 0x033E, 0x033F,
611  /* 4 */ 0x0340, 0x0341, 0x0342, 0x0343, 0x0344, 0x0345, 0x0346, 0x0347,
612          0x0348, 0x0349, 0x034A, 0x034B, 0x034C, 0x034D, 0x034E, 0x034F,
613  /* 5 */ 0x0350, 0x0351, 0x0352, 0x0353, 0x0354, 0x0355, 0x0356, 0x0357,
614          0x0358, 0x0359, 0x035A, 0x035B, 0x035C, 0x035D, 0x035E, 0x035F,
615  /* 6 */ 0x0360, 0x0361, 0x0362, 0x0363, 0x0364, 0x0365, 0x0366, 0x0367,
616          0x0368, 0x0369, 0x036A, 0x036B, 0x036C, 0x036D, 0x036E, 0x036F,
617  /* 7 */ 0x0370, 0x0371, 0x0372, 0x0373, 0x0374, 0x0375, 0x0376, 0x0377,
618          0x0378, 0x0379, 0x037A, 0x037B, 0x037C, 0x037D, 0x037E, 0x037F,
619  /* 8 */ 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386, 0x0387,
620          0x0388, 0x0389, 0x038A, 0x038B, 0x038C, 0x038D, 0x038E, 0x038F,
621  /* 9 */ 0x0390, 0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, 0x03B6, 0x03B7,
622          0x03B8, 0x03B9, 0x03BA, 0x03BB, 0x03BC, 0x03BD, 0x03BE, 0x03BF,
623  /* A */ 0x03C0, 0x03C1, 0x03A2, 0x03C3, 0x03C4, 0x03C5, 0x03C6, 0x03C7,
624          0x03C8, 0x03C9, 0x03AA, 0x03AB, 0x03AC, 0x03AD, 0x03AE, 0x03AF,
625  /* B */ 0x03B0, 0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, 0x03B6, 0x03B7,
626          0x03B8, 0x03B9, 0x03BA, 0x03BB, 0x03BC, 0x03BD, 0x03BE, 0x03BF,
627  /* C */ 0x03C0, 0x03C1, 0x03C2, 0x03C3, 0x03C4, 0x03C5, 0x03C6, 0x03C7,
628          0x03C8, 0x03C9, 0x03CA, 0x03CB, 0x03CC, 0x03CD, 0x03CE, 0x03CF,
629  /* D */ 0x03D0, 0x03D1, 0x03D2, 0x03D3, 0x03D4, 0x03D5, 0x03D6, 0x03D7,
630          0x03D8, 0x03D9, 0x03DA, 0x03DB, 0x03DC, 0x03DD, 0x03DE, 0x03DF,
631  /* E */ 0x03E0, 0x03E1, 0x03E3, 0x03E3, 0x03E5, 0x03E5, 0x03E7, 0x03E7,
632          0x03E9, 0x03E9, 0x03EB, 0x03EB, 0x03ED, 0x03ED, 0x03EF, 0x03EF,
633  /* F */ 0x03F0, 0x03F1, 0x03F2, 0x03F3, 0x03F4, 0x03F5, 0x03F6, 0x03F7,
634          0x03F8, 0x03F9, 0x03FA, 0x03FB, 0x03FC, 0x03FD, 0x03FE, 0x03FF,
635
636  // Table 4 (for high byte 0x04)
637
638  /* 0 */ 0x0400, 0x0401, 0x0452, 0x0403, 0x0454, 0x0455, 0x0456, 0x0407,
639          0x0458, 0x0459, 0x045A, 0x045B, 0x040C, 0x040D, 0x040E, 0x045F,
640  /* 1 */ 0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437,
641          0x0438, 0x0419, 0x043A, 0x043B, 0x043C, 0x043D, 0x043E, 0x043F,
642  /* 2 */ 0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447,
643          0x0448, 0x0449, 0x044A, 0x044B, 0x044C, 0x044D, 0x044E, 0x044F,
644  /* 3 */ 0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437,
645          0x0438, 0x0439, 0x043A, 0x043B, 0x043C, 0x043D, 0x043E, 0x043F,
646  /* 4 */ 0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447,
647          0x0448, 0x0449, 0x044A, 0x044B, 0x044C, 0x044D, 0x044E, 0x044F,
648  /* 5 */ 0x0450, 0x0451, 0x0452, 0x0453, 0x0454, 0x0455, 0x0456, 0x0457,
649          0x0458, 0x0459, 0x045A, 0x045B, 0x045C, 0x045D, 0x045E, 0x045F,
650  /* 6 */ 0x0461, 0x0461, 0x0463, 0x0463, 0x0465, 0x0465, 0x0467, 0x0467,
651          0x0469, 0x0469, 0x046B, 0x046B, 0x046D, 0x046D, 0x046F, 0x046F,
652  /* 7 */ 0x0471, 0x0471, 0x0473, 0x0473, 0x0475, 0x0475, 0x0476, 0x0477,
653          0x0479, 0x0479, 0x047B, 0x047B, 0x047D, 0x047D, 0x047F, 0x047F,
654  /* 8 */ 0x0481, 0x0481, 0x0482, 0x0483, 0x0484, 0x0485, 0x0486, 0x0487,
655          0x0488, 0x0489, 0x048A, 0x048B, 0x048C, 0x048D, 0x048E, 0x048F,
656  /* 9 */ 0x0491, 0x0491, 0x0493, 0x0493, 0x0495, 0x0495, 0x0497, 0x0497,
657          0x0499, 0x0499, 0x049B, 0x049B, 0x049D, 0x049D, 0x049F, 0x049F,
658  /* A */ 0x04A1, 0x04A1, 0x04A3, 0x04A3, 0x04A5, 0x04A5, 0x04A7, 0x04A7,
659          0x04A9, 0x04A9, 0x04AB, 0x04AB, 0x04AD, 0x04AD, 0x04AF, 0x04AF,
660  /* B */ 0x04B1, 0x04B1, 0x04B3, 0x04B3, 0x04B5, 0x04B5, 0x04B7, 0x04B7,
661          0x04B9, 0x04B9, 0x04BB, 0x04BB, 0x04BD, 0x04BD, 0x04BF, 0x04BF,
662  /* C */ 0x04C0, 0x04C1, 0x04C2, 0x04C4, 0x04C4, 0x04C5, 0x04C6, 0x04C8,
663          0x04C8, 0x04C9, 0x04CA, 0x04CC, 0x04CC, 0x04CD, 0x04CE, 0x04CF,
664  /* D */ 0x04D0, 0x04D1, 0x04D2, 0x04D3, 0x04D4, 0x04D5, 0x04D6, 0x04D7,
665          0x04D8, 0x04D9, 0x04DA, 0x04DB, 0x04DC, 0x04DD, 0x04DE, 0x04DF,
666  /* E */ 0x04E0, 0x04E1, 0x04E2, 0x04E3, 0x04E4, 0x04E5, 0x04E6, 0x04E7,
667          0x04E8, 0x04E9, 0x04EA, 0x04EB, 0x04EC, 0x04ED, 0x04EE, 0x04EF,
668  /* F */ 0x04F0, 0x04F1, 0x04F2, 0x04F3, 0x04F4, 0x04F5, 0x04F6, 0x04F7,
669          0x04F8, 0x04F9, 0x04FA, 0x04FB, 0x04FC, 0x04FD, 0x04FE, 0x04FF,
670
671  // Table 5 (for high byte 0x05)
672
673  /* 0 */ 0x0500, 0x0501, 0x0502, 0x0503, 0x0504, 0x0505, 0x0506, 0x0507,
674          0x0508, 0x0509, 0x050A, 0x050B, 0x050C, 0x050D, 0x050E, 0x050F,
675  /* 1 */ 0x0510, 0x0511, 0x0512, 0x0513, 0x0514, 0x0515, 0x0516, 0x0517,
676          0x0518, 0x0519, 0x051A, 0x051B, 0x051C, 0x051D, 0x051E, 0x051F,
677  /* 2 */ 0x0520, 0x0521, 0x0522, 0x0523, 0x0524, 0x0525, 0x0526, 0x0527,
678          0x0528, 0x0529, 0x052A, 0x052B, 0x052C, 0x052D, 0x052E, 0x052F,
679  /* 3 */ 0x0530, 0x0561, 0x0562, 0x0563, 0x0564, 0x0565, 0x0566, 0x0567,
680          0x0568, 0x0569, 0x056A, 0x056B, 0x056C, 0x056D, 0x056E, 0x056F,
681  /* 4 */ 0x0570, 0x0571, 0x0572, 0x0573, 0x0574, 0x0575, 0x0576, 0x0577,
682          0x0578, 0x0579, 0x057A, 0x057B, 0x057C, 0x057D, 0x057E, 0x057F,
683  /* 5 */ 0x0580, 0x0581, 0x0582, 0x0583, 0x0584, 0x0585, 0x0586, 0x0557,
684          0x0558, 0x0559, 0x055A, 0x055B, 0x055C, 0x055D, 0x055E, 0x055F,
685  /* 6 */ 0x0560, 0x0561, 0x0562, 0x0563, 0x0564, 0x0565, 0x0566, 0x0567,
686          0x0568, 0x0569, 0x056A, 0x056B, 0x056C, 0x056D, 0x056E, 0x056F,
687  /* 7 */ 0x0570, 0x0571, 0x0572, 0x0573, 0x0574, 0x0575, 0x0576, 0x0577,
688          0x0578, 0x0579, 0x057A, 0x057B, 0x057C, 0x057D, 0x057E, 0x057F,
689  /* 8 */ 0x0580, 0x0581, 0x0582, 0x0583, 0x0584, 0x0585, 0x0586, 0x0587,
690          0x0588, 0x0589, 0x058A, 0x058B, 0x058C, 0x058D, 0x058E, 0x058F,
691  /* 9 */ 0x0590, 0x0591, 0x0592, 0x0593, 0x0594, 0x0595, 0x0596, 0x0597,
692          0x0598, 0x0599, 0x059A, 0x059B, 0x059C, 0x059D, 0x059E, 0x059F,
693  /* A */ 0x05A0, 0x05A1, 0x05A2, 0x05A3, 0x05A4, 0x05A5, 0x05A6, 0x05A7,
694          0x05A8, 0x05A9, 0x05AA, 0x05AB, 0x05AC, 0x05AD, 0x05AE, 0x05AF,
695  /* B */ 0x05B0, 0x05B1, 0x05B2, 0x05B3, 0x05B4, 0x05B5, 0x05B6, 0x05B7,
696          0x05B8, 0x05B9, 0x05BA, 0x05BB, 0x05BC, 0x05BD, 0x05BE, 0x05BF,
697  /* C */ 0x05C0, 0x05C1, 0x05C2, 0x05C3, 0x05C4, 0x05C5, 0x05C6, 0x05C7,
698          0x05C8, 0x05C9, 0x05CA, 0x05CB, 0x05CC, 0x05CD, 0x05CE, 0x05CF,
699  /* D */ 0x05D0, 0x05D1, 0x05D2, 0x05D3, 0x05D4, 0x05D5, 0x05D6, 0x05D7,
700          0x05D8, 0x05D9, 0x05DA, 0x05DB, 0x05DC, 0x05DD, 0x05DE, 0x05DF,
701  /* E */ 0x05E0, 0x05E1, 0x05E2, 0x05E3, 0x05E4, 0x05E5, 0x05E6, 0x05E7,
702          0x05E8, 0x05E9, 0x05EA, 0x05EB, 0x05EC, 0x05ED, 0x05EE, 0x05EF,
703  /* F */ 0x05F0, 0x05F1, 0x05F2, 0x05F3, 0x05F4, 0x05F5, 0x05F6, 0x05F7,
704          0x05F8, 0x05F9, 0x05FA, 0x05FB, 0x05FC, 0x05FD, 0x05FE, 0x05FF,
705
706  // Table 6 (for high byte 0x10)
707
708  /* 0 */ 0x1000, 0x1001, 0x1002, 0x1003, 0x1004, 0x1005, 0x1006, 0x1007,
709          0x1008, 0x1009, 0x100A, 0x100B, 0x100C, 0x100D, 0x100E, 0x100F,
710  /* 1 */ 0x1010, 0x1011, 0x1012, 0x1013, 0x1014, 0x1015, 0x1016, 0x1017,
711          0x1018, 0x1019, 0x101A, 0x101B, 0x101C, 0x101D, 0x101E, 0x101F,
712  /* 2 */ 0x1020, 0x1021, 0x1022, 0x1023, 0x1024, 0x1025, 0x1026, 0x1027,
713          0x1028, 0x1029, 0x102A, 0x102B, 0x102C, 0x102D, 0x102E, 0x102F,
714  /* 3 */ 0x1030, 0x1031, 0x1032, 0x1033, 0x1034, 0x1035, 0x1036, 0x1037,
715          0x1038, 0x1039, 0x103A, 0x103B, 0x103C, 0x103D, 0x103E, 0x103F,
716  /* 4 */ 0x1040, 0x1041, 0x1042, 0x1043, 0x1044, 0x1045, 0x1046, 0x1047,
717          0x1048, 0x1049, 0x104A, 0x104B, 0x104C, 0x104D, 0x104E, 0x104F,
718  /* 5 */ 0x1050, 0x1051, 0x1052, 0x1053, 0x1054, 0x1055, 0x1056, 0x1057,
719          0x1058, 0x1059, 0x105A, 0x105B, 0x105C, 0x105D, 0x105E, 0x105F,
720  /* 6 */ 0x1060, 0x1061, 0x1062, 0x1063, 0x1064, 0x1065, 0x1066, 0x1067,
721          0x1068, 0x1069, 0x106A, 0x106B, 0x106C, 0x106D, 0x106E, 0x106F,
722  /* 7 */ 0x1070, 0x1071, 0x1072, 0x1073, 0x1074, 0x1075, 0x1076, 0x1077,
723          0x1078, 0x1079, 0x107A, 0x107B, 0x107C, 0x107D, 0x107E, 0x107F,
724  /* 8 */ 0x1080, 0x1081, 0x1082, 0x1083, 0x1084, 0x1085, 0x1086, 0x1087,
725          0x1088, 0x1089, 0x108A, 0x108B, 0x108C, 0x108D, 0x108E, 0x108F,
726  /* 9 */ 0x1090, 0x1091, 0x1092, 0x1093, 0x1094, 0x1095, 0x1096, 0x1097,
727          0x1098, 0x1099, 0x109A, 0x109B, 0x109C, 0x109D, 0x109E, 0x109F,
728  /* A */ 0x10D0, 0x10D1, 0x10D2, 0x10D3, 0x10D4, 0x10D5, 0x10D6, 0x10D7,
729          0x10D8, 0x10D9, 0x10DA, 0x10DB, 0x10DC, 0x10DD, 0x10DE, 0x10DF,
730  /* B */ 0x10E0, 0x10E1, 0x10E2, 0x10E3, 0x10E4, 0x10E5, 0x10E6, 0x10E7,
731          0x10E8, 0x10E9, 0x10EA, 0x10EB, 0x10EC, 0x10ED, 0x10EE, 0x10EF,
732  /* C */ 0x10F0, 0x10F1, 0x10F2, 0x10F3, 0x10F4, 0x10F5, 0x10C6, 0x10C7,
733          0x10C8, 0x10C9, 0x10CA, 0x10CB, 0x10CC, 0x10CD, 0x10CE, 0x10CF,
734  /* D */ 0x10D0, 0x10D1, 0x10D2, 0x10D3, 0x10D4, 0x10D5, 0x10D6, 0x10D7,
735          0x10D8, 0x10D9, 0x10DA, 0x10DB, 0x10DC, 0x10DD, 0x10DE, 0x10DF,
736  /* E */ 0x10E0, 0x10E1, 0x10E2, 0x10E3, 0x10E4, 0x10E5, 0x10E6, 0x10E7,
737          0x10E8, 0x10E9, 0x10EA, 0x10EB, 0x10EC, 0x10ED, 0x10EE, 0x10EF,
738  /* F */ 0x10F0, 0x10F1, 0x10F2, 0x10F3, 0x10F4, 0x10F5, 0x10F6, 0x10F7,
739          0x10F8, 0x10F9, 0x10FA, 0x10FB, 0x10FC, 0x10FD, 0x10FE, 0x10FF,
740
741  // Table 7 (for high byte 0x20)
742
743  /* 0 */ 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007,
744          0x2008, 0x2009, 0x200A, 0x200B, 0x0000, 0x0000, 0x0000, 0x0000,
745  /* 1 */ 0x2010, 0x2011, 0x2012, 0x2013, 0x2014, 0x2015, 0x2016, 0x2017,
746          0x2018, 0x2019, 0x201A, 0x201B, 0x201C, 0x201D, 0x201E, 0x201F,
747  /* 2 */ 0x2020, 0x2021, 0x2022, 0x2023, 0x2024, 0x2025, 0x2026, 0x2027,
748          0x2028, 0x2029, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x202F,
749  /* 3 */ 0x2030, 0x2031, 0x2032, 0x2033, 0x2034, 0x2035, 0x2036, 0x2037,
750          0x2038, 0x2039, 0x203A, 0x203B, 0x203C, 0x203D, 0x203E, 0x203F,
751  /* 4 */ 0x2040, 0x2041, 0x2042, 0x2043, 0x2044, 0x2045, 0x2046, 0x2047,
752          0x2048, 0x2049, 0x204A, 0x204B, 0x204C, 0x204D, 0x204E, 0x204F,
753  /* 5 */ 0x2050, 0x2051, 0x2052, 0x2053, 0x2054, 0x2055, 0x2056, 0x2057,
754          0x2058, 0x2059, 0x205A, 0x205B, 0x205C, 0x205D, 0x205E, 0x205F,
755  /* 6 */ 0x2060, 0x2061, 0x2062, 0x2063, 0x2064, 0x2065, 0x2066, 0x2067,
756          0x2068, 0x2069, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
757  /* 7 */ 0x2070, 0x2071, 0x2072, 0x2073, 0x2074, 0x2075, 0x2076, 0x2077,
758          0x2078, 0x2079, 0x207A, 0x207B, 0x207C, 0x207D, 0x207E, 0x207F,
759  /* 8 */ 0x2080, 0x2081, 0x2082, 0x2083, 0x2084, 0x2085, 0x2086, 0x2087,
760          0x2088, 0x2089, 0x208A, 0x208B, 0x208C, 0x208D, 0x208E, 0x208F,
761  /* 9 */ 0x2090, 0x2091, 0x2092, 0x2093, 0x2094, 0x2095, 0x2096, 0x2097,
762          0x2098, 0x2099, 0x209A, 0x209B, 0x209C, 0x209D, 0x209E, 0x209F,
763  /* A */ 0x20A0, 0x20A1, 0x20A2, 0x20A3, 0x20A4, 0x20A5, 0x20A6, 0x20A7,
764          0x20A8, 0x20A9, 0x20AA, 0x20AB, 0x20AC, 0x20AD, 0x20AE, 0x20AF,
765  /* B */ 0x20B0, 0x20B1, 0x20B2, 0x20B3, 0x20B4, 0x20B5, 0x20B6, 0x20B7,
766          0x20B8, 0x20B9, 0x20BA, 0x20BB, 0x20BC, 0x20BD, 0x20BE, 0x20BF,
767  /* C */ 0x20C0, 0x20C1, 0x20C2, 0x20C3, 0x20C4, 0x20C5, 0x20C6, 0x20C7,
768          0x20C8, 0x20C9, 0x20CA, 0x20CB, 0x20CC, 0x20CD, 0x20CE, 0x20CF,
769  /* D */ 0x20D0, 0x20D1, 0x20D2, 0x20D3, 0x20D4, 0x20D5, 0x20D6, 0x20D7,
770          0x20D8, 0x20D9, 0x20DA, 0x20DB, 0x20DC, 0x20DD, 0x20DE, 0x20DF,
771  /* E */ 0x20E0, 0x20E1, 0x20E2, 0x20E3, 0x20E4, 0x20E5, 0x20E6, 0x20E7,
772          0x20E8, 0x20E9, 0x20EA, 0x20EB, 0x20EC, 0x20ED, 0x20EE, 0x20EF,
773  /* F */ 0x20F0, 0x20F1, 0x20F2, 0x20F3, 0x20F4, 0x20F5, 0x20F6, 0x20F7,
774          0x20F8, 0x20F9, 0x20FA, 0x20FB, 0x20FC, 0x20FD, 0x20FE, 0x20FF,
775
776  // Table 8 (for high byte 0x21)
777
778  /* 0 */ 0x2100, 0x2101, 0x2102, 0x2103, 0x2104, 0x2105, 0x2106, 0x2107,
779          0x2108, 0x2109, 0x210A, 0x210B, 0x210C, 0x210D, 0x210E, 0x210F,
780  /* 1 */ 0x2110, 0x2111, 0x2112, 0x2113, 0x2114, 0x2115, 0x2116, 0x2117,
781          0x2118, 0x2119, 0x211A, 0x211B, 0x211C, 0x211D, 0x211E, 0x211F,
782  /* 2 */ 0x2120, 0x2121, 0x2122, 0x2123, 0x2124, 0x2125, 0x2126, 0x2127,
783          0x2128, 0x2129, 0x212A, 0x212B, 0x212C, 0x212D, 0x212E, 0x212F,
784  /* 3 */ 0x2130, 0x2131, 0x2132, 0x2133, 0x2134, 0x2135, 0x2136, 0x2137,
785          0x2138, 0x2139, 0x213A, 0x213B, 0x213C, 0x213D, 0x213E, 0x213F,
786  /* 4 */ 0x2140, 0x2141, 0x2142, 0x2143, 0x2144, 0x2145, 0x2146, 0x2147,
787          0x2148, 0x2149, 0x214A, 0x214B, 0x214C, 0x214D, 0x214E, 0x214F,
788  /* 5 */ 0x2150, 0x2151, 0x2152, 0x2153, 0x2154, 0x2155, 0x2156, 0x2157,
789          0x2158, 0x2159, 0x215A, 0x215B, 0x215C, 0x215D, 0x215E, 0x215F,
790  /* 6 */ 0x2170, 0x2171, 0x2172, 0x2173, 0x2174, 0x2175, 0x2176, 0x2177,
791          0x2178, 0x2179, 0x217A, 0x217B, 0x217C, 0x217D, 0x217E, 0x217F,
792  /* 7 */ 0x2170, 0x2171, 0x2172, 0x2173, 0x2174, 0x2175, 0x2176, 0x2177,
793          0x2178, 0x2179, 0x217A, 0x217B, 0x217C, 0x217D, 0x217E, 0x217F,
794  /* 8 */ 0x2180, 0x2181, 0x2182, 0x2183, 0x2184, 0x2185, 0x2186, 0x2187,
795          0x2188, 0x2189, 0x218A, 0x218B, 0x218C, 0x218D, 0x218E, 0x218F,
796  /* 9 */ 0x2190, 0x2191, 0x2192, 0x2193, 0x2194, 0x2195, 0x2196, 0x2197,
797          0x2198, 0x2199, 0x219A, 0x219B, 0x219C, 0x219D, 0x219E, 0x219F,
798  /* A */ 0x21A0, 0x21A1, 0x21A2, 0x21A3, 0x21A4, 0x21A5, 0x21A6, 0x21A7,
799          0x21A8, 0x21A9, 0x21AA, 0x21AB, 0x21AC, 0x21AD, 0x21AE, 0x21AF,
800  /* B */ 0x21B0, 0x21B1, 0x21B2, 0x21B3, 0x21B4, 0x21B5, 0x21B6, 0x21B7,
801          0x21B8, 0x21B9, 0x21BA, 0x21BB, 0x21BC, 0x21BD, 0x21BE, 0x21BF,
802  /* C */ 0x21C0, 0x21C1, 0x21C2, 0x21C3, 0x21C4, 0x21C5, 0x21C6, 0x21C7,
803          0x21C8, 0x21C9, 0x21CA, 0x21CB, 0x21CC, 0x21CD, 0x21CE, 0x21CF,
804  /* D */ 0x21D0, 0x21D1, 0x21D2, 0x21D3, 0x21D4, 0x21D5, 0x21D6, 0x21D7,
805          0x21D8, 0x21D9, 0x21DA, 0x21DB, 0x21DC, 0x21DD, 0x21DE, 0x21DF,
806  /* E */ 0x21E0, 0x21E1, 0x21E2, 0x21E3, 0x21E4, 0x21E5, 0x21E6, 0x21E7,
807          0x21E8, 0x21E9, 0x21EA, 0x21EB, 0x21EC, 0x21ED, 0x21EE, 0x21EF,
808  /* F */ 0x21F0, 0x21F1, 0x21F2, 0x21F3, 0x21F4, 0x21F5, 0x21F6, 0x21F7,
809          0x21F8, 0x21F9, 0x21FA, 0x21FB, 0x21FC, 0x21FD, 0x21FE, 0x21FF,
810
811  // Table 9 (for high byte 0xFE)
812
813  /* 0 */ 0xFE00, 0xFE01, 0xFE02, 0xFE03, 0xFE04, 0xFE05, 0xFE06, 0xFE07,
814          0xFE08, 0xFE09, 0xFE0A, 0xFE0B, 0xFE0C, 0xFE0D, 0xFE0E, 0xFE0F,
815  /* 1 */ 0xFE10, 0xFE11, 0xFE12, 0xFE13, 0xFE14, 0xFE15, 0xFE16, 0xFE17,
816          0xFE18, 0xFE19, 0xFE1A, 0xFE1B, 0xFE1C, 0xFE1D, 0xFE1E, 0xFE1F,
817  /* 2 */ 0xFE20, 0xFE21, 0xFE22, 0xFE23, 0xFE24, 0xFE25, 0xFE26, 0xFE27,
818          0xFE28, 0xFE29, 0xFE2A, 0xFE2B, 0xFE2C, 0xFE2D, 0xFE2E, 0xFE2F,
819  /* 3 */ 0xFE30, 0xFE31, 0xFE32, 0xFE33, 0xFE34, 0xFE35, 0xFE36, 0xFE37,
820          0xFE38, 0xFE39, 0xFE3A, 0xFE3B, 0xFE3C, 0xFE3D, 0xFE3E, 0xFE3F,
821  /* 4 */ 0xFE40, 0xFE41, 0xFE42, 0xFE43, 0xFE44, 0xFE45, 0xFE46, 0xFE47,
822          0xFE48, 0xFE49, 0xFE4A, 0xFE4B, 0xFE4C, 0xFE4D, 0xFE4E, 0xFE4F,
823  /* 5 */ 0xFE50, 0xFE51, 0xFE52, 0xFE53, 0xFE54, 0xFE55, 0xFE56, 0xFE57,
824          0xFE58, 0xFE59, 0xFE5A, 0xFE5B, 0xFE5C, 0xFE5D, 0xFE5E, 0xFE5F,
825  /* 6 */ 0xFE60, 0xFE61, 0xFE62, 0xFE63, 0xFE64, 0xFE65, 0xFE66, 0xFE67,
826          0xFE68, 0xFE69, 0xFE6A, 0xFE6B, 0xFE6C, 0xFE6D, 0xFE6E, 0xFE6F,
827  /* 7 */ 0xFE70, 0xFE71, 0xFE72, 0xFE73, 0xFE74, 0xFE75, 0xFE76, 0xFE77,
828          0xFE78, 0xFE79, 0xFE7A, 0xFE7B, 0xFE7C, 0xFE7D, 0xFE7E, 0xFE7F,
829  /* 8 */ 0xFE80, 0xFE81, 0xFE82, 0xFE83, 0xFE84, 0xFE85, 0xFE86, 0xFE87,
830          0xFE88, 0xFE89, 0xFE8A, 0xFE8B, 0xFE8C, 0xFE8D, 0xFE8E, 0xFE8F,
831  /* 9 */ 0xFE90, 0xFE91, 0xFE92, 0xFE93, 0xFE94, 0xFE95, 0xFE96, 0xFE97,
832          0xFE98, 0xFE99, 0xFE9A, 0xFE9B, 0xFE9C, 0xFE9D, 0xFE9E, 0xFE9F,
833  /* A */ 0xFEA0, 0xFEA1, 0xFEA2, 0xFEA3, 0xFEA4, 0xFEA5, 0xFEA6, 0xFEA7,
834          0xFEA8, 0xFEA9, 0xFEAA, 0xFEAB, 0xFEAC, 0xFEAD, 0xFEAE, 0xFEAF,
835  /* B */ 0xFEB0, 0xFEB1, 0xFEB2, 0xFEB3, 0xFEB4, 0xFEB5, 0xFEB6, 0xFEB7,
836          0xFEB8, 0xFEB9, 0xFEBA, 0xFEBB, 0xFEBC, 0xFEBD, 0xFEBE, 0xFEBF,
837  /* C */ 0xFEC0, 0xFEC1, 0xFEC2, 0xFEC3, 0xFEC4, 0xFEC5, 0xFEC6, 0xFEC7,
838          0xFEC8, 0xFEC9, 0xFECA, 0xFECB, 0xFECC, 0xFECD, 0xFECE, 0xFECF,
839  /* D */ 0xFED0, 0xFED1, 0xFED2, 0xFED3, 0xFED4, 0xFED5, 0xFED6, 0xFED7,
840          0xFED8, 0xFED9, 0xFEDA, 0xFEDB, 0xFEDC, 0xFEDD, 0xFEDE, 0xFEDF,
841  /* E */ 0xFEE0, 0xFEE1, 0xFEE2, 0xFEE3, 0xFEE4, 0xFEE5, 0xFEE6, 0xFEE7,
842          0xFEE8, 0xFEE9, 0xFEEA, 0xFEEB, 0xFEEC, 0xFEED, 0xFEEE, 0xFEEF,
843  /* F */ 0xFEF0, 0xFEF1, 0xFEF2, 0xFEF3, 0xFEF4, 0xFEF5, 0xFEF6, 0xFEF7,
844          0xFEF8, 0xFEF9, 0xFEFA, 0xFEFB, 0xFEFC, 0xFEFD, 0xFEFE, 0x0000,
845
846  // Table 10 (for high byte 0xFF)
847
848  /* 0 */ 0xFF00, 0xFF01, 0xFF02, 0xFF03, 0xFF04, 0xFF05, 0xFF06, 0xFF07,
849          0xFF08, 0xFF09, 0xFF0A, 0xFF0B, 0xFF0C, 0xFF0D, 0xFF0E, 0xFF0F,
850  /* 1 */ 0xFF10, 0xFF11, 0xFF12, 0xFF13, 0xFF14, 0xFF15, 0xFF16, 0xFF17,
851          0xFF18, 0xFF19, 0xFF1A, 0xFF1B, 0xFF1C, 0xFF1D, 0xFF1E, 0xFF1F,
852  /* 2 */ 0xFF20, 0xFF41, 0xFF42, 0xFF43, 0xFF44, 0xFF45, 0xFF46, 0xFF47,
853          0xFF48, 0xFF49, 0xFF4A, 0xFF4B, 0xFF4C, 0xFF4D, 0xFF4E, 0xFF4F,
854  /* 3 */ 0xFF50, 0xFF51, 0xFF52, 0xFF53, 0xFF54, 0xFF55, 0xFF56, 0xFF57,
855          0xFF58, 0xFF59, 0xFF5A, 0xFF3B, 0xFF3C, 0xFF3D, 0xFF3E, 0xFF3F,
856  /* 4 */ 0xFF40, 0xFF41, 0xFF42, 0xFF43, 0xFF44, 0xFF45, 0xFF46, 0xFF47,
857          0xFF48, 0xFF49, 0xFF4A, 0xFF4B, 0xFF4C, 0xFF4D, 0xFF4E, 0xFF4F,
858  /* 5 */ 0xFF50, 0xFF51, 0xFF52, 0xFF53, 0xFF54, 0xFF55, 0xFF56, 0xFF57,
859          0xFF58, 0xFF59, 0xFF5A, 0xFF5B, 0xFF5C, 0xFF5D, 0xFF5E, 0xFF5F,
860  /* 6 */ 0xFF60, 0xFF61, 0xFF62, 0xFF63, 0xFF64, 0xFF65, 0xFF66, 0xFF67,
861          0xFF68, 0xFF69, 0xFF6A, 0xFF6B, 0xFF6C, 0xFF6D, 0xFF6E, 0xFF6F,
862  /* 7 */ 0xFF70, 0xFF71, 0xFF72, 0xFF73, 0xFF74, 0xFF75, 0xFF76, 0xFF77,
863          0xFF78, 0xFF79, 0xFF7A, 0xFF7B, 0xFF7C, 0xFF7D, 0xFF7E, 0xFF7F,
864  /* 8 */ 0xFF80, 0xFF81, 0xFF82, 0xFF83, 0xFF84, 0xFF85, 0xFF86, 0xFF87,
865          0xFF88, 0xFF89, 0xFF8A, 0xFF8B, 0xFF8C, 0xFF8D, 0xFF8E, 0xFF8F,
866  /* 9 */ 0xFF90, 0xFF91, 0xFF92, 0xFF93, 0xFF94, 0xFF95, 0xFF96, 0xFF97,
867          0xFF98, 0xFF99, 0xFF9A, 0xFF9B, 0xFF9C, 0xFF9D, 0xFF9E, 0xFF9F,
868  /* A */ 0xFFA0, 0xFFA1, 0xFFA2, 0xFFA3, 0xFFA4, 0xFFA5, 0xFFA6, 0xFFA7,
869          0xFFA8, 0xFFA9, 0xFFAA, 0xFFAB, 0xFFAC, 0xFFAD, 0xFFAE, 0xFFAF,
870  /* B */ 0xFFB0, 0xFFB1, 0xFFB2, 0xFFB3, 0xFFB4, 0xFFB5, 0xFFB6, 0xFFB7,
871          0xFFB8, 0xFFB9, 0xFFBA, 0xFFBB, 0xFFBC, 0xFFBD, 0xFFBE, 0xFFBF,
872  /* C */ 0xFFC0, 0xFFC1, 0xFFC2, 0xFFC3, 0xFFC4, 0xFFC5, 0xFFC6, 0xFFC7,
873          0xFFC8, 0xFFC9, 0xFFCA, 0xFFCB, 0xFFCC, 0xFFCD, 0xFFCE, 0xFFCF,
874  /* D */ 0xFFD0, 0xFFD1, 0xFFD2, 0xFFD3, 0xFFD4, 0xFFD5, 0xFFD6, 0xFFD7,
875          0xFFD8, 0xFFD9, 0xFFDA, 0xFFDB, 0xFFDC, 0xFFDD, 0xFFDE, 0xFFDF,
876  /* E */ 0xFFE0, 0xFFE1, 0xFFE2, 0xFFE3, 0xFFE4, 0xFFE5, 0xFFE6, 0xFFE7,
877          0xFFE8, 0xFFE9, 0xFFEA, 0xFFEB, 0xFFEC, 0xFFED, 0xFFEE, 0xFFEF,
878  /* F */ 0xFFF0, 0xFFF1, 0xFFF2, 0xFFF3, 0xFFF4, 0xFFF5, 0xFFF6, 0xFFF7,
879          0xFFF8, 0xFFF9, 0xFFFA, 0xFFFB, 0xFFFC, 0xFFFD, 0xFFFE, 0xFFFF,
880};
881
882// Returns the next non-ignorable codepoint within string starting from the
883// position indicated by index, or zero if there are no more.
884// The passed-in index is automatically advanced as the characters in the input
885// HFS-decomposed UTF-8 strings are read.
886inline int HFSReadNextNonIgnorableCodepoint(const char* string,
887                                            int length,
888                                            int* index) {
889  int codepoint = 0;
890  while (*index < length && codepoint == 0) {
891    // CBU8_NEXT returns a value < 0 in error cases. For purposes of string
892    // comparison, we just use that value and flag it with DCHECK.
893    CBU8_NEXT(string, *index, length, codepoint);
894    DCHECK_GT(codepoint, 0);
895    if (codepoint > 0) {
896      // Check if there is a subtable for this upper byte.
897      int lookup_offset = lower_case_table[codepoint >> 8];
898      if (lookup_offset != 0)
899        codepoint = lower_case_table[lookup_offset + (codepoint & 0x00FF)];
900      // Note: codepoint1 may be again 0 at this point if the character was
901      // an ignorable.
902    }
903  }
904  return codepoint;
905}
906
907}  // anonymous namespace
908
909// Special UTF-8 version of FastUnicodeCompare. Cf:
910// http://developer.apple.com/mac/library/technotes/tn/tn1150.html#StringComparisonAlgorithm
911// The input strings must be in the special HFS decomposed form.
912int FilePath::HFSFastUnicodeCompare(const StringType& string1,
913                                    const StringType& string2) {
914  int length1 = string1.length();
915  int length2 = string2.length();
916  int index1 = 0;
917  int index2 = 0;
918
919  for (;;) {
920    int codepoint1 = HFSReadNextNonIgnorableCodepoint(string1.c_str(),
921                                                      length1,
922                                                      &index1);
923    int codepoint2 = HFSReadNextNonIgnorableCodepoint(string2.c_str(),
924                                                      length2,
925                                                      &index2);
926    if (codepoint1 != codepoint2)
927      return (codepoint1 < codepoint2) ? -1 : 1;
928    if (codepoint1 == 0) {
929      DCHECK_EQ(index1, length1);
930      DCHECK_EQ(index2, length2);
931      return 0;
932    }
933  }
934}
935
936FilePath::StringType FilePath::GetHFSDecomposedForm(const StringType& string) {
937  scoped_cftyperef<CFStringRef> cfstring(
938      CFStringCreateWithBytesNoCopy(
939          NULL,
940          reinterpret_cast<const UInt8*>(string.c_str()),
941          string.length(),
942          kCFStringEncodingUTF8,
943          false,
944          kCFAllocatorNull));
945  // Query the maximum length needed to store the result. In most cases this
946  // will overestimate the required space. The return value also already
947  // includes the space needed for a terminating 0.
948  CFIndex length = CFStringGetMaximumSizeOfFileSystemRepresentation(cfstring);
949  DCHECK_GT(length, 0);  // should be at least 1 for the 0-terminator.
950  // Reserve enough space for CFStringGetFileSystemRepresentation to write into.
951  // Also set the length to the maximum so that we can shrink it later.
952  // (Increasing rather than decreasing it would clobber the string contents!)
953  StringType result;
954  result.reserve(length);
955  result.resize(length - 1);
956  Boolean success = CFStringGetFileSystemRepresentation(cfstring,
957                                                        &result[0],
958                                                        length);
959  if (success) {
960    // Reduce result.length() to actual string length.
961    result.resize(strlen(result.c_str()));
962  } else {
963    // An error occurred -> clear result.
964    result.clear();
965  }
966  return result;
967}
968
969int FilePath::CompareIgnoreCase(const StringType& string1,
970                                const StringType& string2) {
971  // Quick checks for empty strings - these speed things up a bit and make the
972  // following code cleaner.
973  if (string1.empty())
974    return string2.empty() ? 0 : -1;
975  if (string2.empty())
976    return 1;
977
978  StringType hfs1 = GetHFSDecomposedForm(string1);
979  StringType hfs2 = GetHFSDecomposedForm(string2);
980
981  // GetHFSDecomposedForm() returns an empty string in an error case.
982  if (hfs1.empty() || hfs2.empty()) {
983    NOTREACHED();
984    scoped_cftyperef<CFStringRef> cfstring1(
985        CFStringCreateWithBytesNoCopy(
986            NULL,
987            reinterpret_cast<const UInt8*>(string1.c_str()),
988            string1.length(),
989            kCFStringEncodingUTF8,
990            false,
991            kCFAllocatorNull));
992    scoped_cftyperef<CFStringRef> cfstring2(
993        CFStringCreateWithBytesNoCopy(
994            NULL,
995            reinterpret_cast<const UInt8*>(string2.c_str()),
996            string2.length(),
997            kCFStringEncodingUTF8,
998            false,
999            kCFAllocatorNull));
1000    return CFStringCompare(cfstring1,
1001                           cfstring2,
1002                           kCFCompareCaseInsensitive);
1003  }
1004
1005  return HFSFastUnicodeCompare(hfs1, hfs2);
1006}
1007
1008#else  // << WIN. MACOSX | other (POSIX) >>
1009
1010// Generic (POSIX) implementation of file string comparison.
1011// TODO(rolandsteiner) check if this is sufficient/correct.
1012int FilePath::CompareIgnoreCase(const StringType& string1,
1013                                const StringType& string2) {
1014  int comparison = strcasecmp(string1.c_str(), string2.c_str());
1015  if (comparison < 0)
1016    return -1;
1017  if (comparison > 0)
1018    return 1;
1019  return 0;
1020}
1021
1022#endif  // OS versions of CompareIgnoreCase()
1023
1024#if defined(OS_POSIX)
1025
1026// See file_path.h for a discussion of the encoding of paths on POSIX
1027// platforms.  These *Hack() functions are not quite correct, but they're
1028// only temporary while we fix the remainder of the code.
1029// Remember to remove the #includes at the top when you remove these.
1030
1031// static
1032FilePath FilePath::FromWStringHack(const std::wstring& wstring) {
1033  return FilePath(base::SysWideToNativeMB(wstring));
1034}
1035std::wstring FilePath::ToWStringHack() const {
1036  return base::SysNativeMBToWide(path_);
1037}
1038#elif defined(OS_WIN)
1039// static
1040FilePath FilePath::FromWStringHack(const std::wstring& wstring) {
1041  return FilePath(wstring);
1042}
1043std::wstring FilePath::ToWStringHack() const {
1044  return path_;
1045}
1046#endif
1047
1048FilePath FilePath::StripTrailingSeparators() const {
1049  FilePath new_path(path_);
1050  new_path.StripTrailingSeparatorsInternal();
1051
1052  return new_path;
1053}
1054
1055// static.
1056void FilePath::WriteStringTypeToPickle(Pickle* pickle,
1057                                       const FilePath::StringType& path) {
1058#if defined(WCHAR_T_IS_UTF16)
1059  pickle->WriteWString(path);
1060#elif defined(WCHAR_T_IS_UTF32)
1061  pickle->WriteString(path);
1062#else
1063  NOTIMPLEMENTED() << "Impossible encoding situation!";
1064#endif
1065}
1066
1067// static.
1068bool FilePath::ReadStringTypeFromPickle(Pickle* pickle, void** iter,
1069                                        FilePath::StringType* path) {
1070#if defined(WCHAR_T_IS_UTF16)
1071  if (!pickle->ReadWString(iter, path))
1072    return false;
1073#elif defined(WCHAR_T_IS_UTF32)
1074  if (!pickle->ReadString(iter, path))
1075    return false;
1076#else
1077  NOTIMPLEMENTED() << "Impossible encoding situation!";
1078  return false;
1079#endif
1080
1081  return true;
1082}
1083
1084void FilePath::WriteToPickle(Pickle* pickle) {
1085  WriteStringTypeToPickle(pickle, value());
1086}
1087
1088bool FilePath::ReadFromPickle(Pickle* pickle, void** iter) {
1089  return ReadStringTypeFromPickle(pickle, iter, &path_);
1090}
1091
1092void FilePath::StripTrailingSeparatorsInternal() {
1093  // If there is no drive letter, start will be 1, which will prevent stripping
1094  // the leading separator if there is only one separator.  If there is a drive
1095  // letter, start will be set appropriately to prevent stripping the first
1096  // separator following the drive letter, if a separator immediately follows
1097  // the drive letter.
1098  StringType::size_type start = FindDriveLetter(path_) + 2;
1099
1100  StringType::size_type last_stripped = StringType::npos;
1101  for (StringType::size_type pos = path_.length();
1102       pos > start && IsSeparator(path_[pos - 1]);
1103       --pos) {
1104    // If the string only has two separators and they're at the beginning,
1105    // don't strip them, unless the string began with more than two separators.
1106    if (pos != start + 1 || last_stripped == start + 2 ||
1107        !IsSeparator(path_[start - 1])) {
1108      path_.resize(pos - 1);
1109      last_stripped = pos;
1110    }
1111  }
1112}
1113
1114bool FilePath::ReferencesParent() const {
1115  std::vector<FilePath::StringType> components;
1116  GetComponents(&components);
1117
1118  std::vector<FilePath::StringType>::const_iterator it = components.begin();
1119  for (; it != components.end(); ++it) {
1120    const FilePath::StringType& component = *it;
1121    if (component == kParentDirectory)
1122      return true;
1123  }
1124  return false;
1125}
1126
1127