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      1 // Copyright (c) 2012 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/files/file_path.h"
      6 
      7 #include <string.h>
      8 #include <algorithm>
      9 
     10 #include "base/basictypes.h"
     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/strings/string_piece.h"
     17 #include "base/strings/string_util.h"
     18 #include "base/strings/sys_string_conversions.h"
     19 #include "base/strings/utf_string_conversions.h"
     20 
     21 #if defined(OS_MACOSX)
     22 #include "base/mac/scoped_cftyperef.h"
     23 #include "base/third_party/icu/icu_utf.h"
     24 #endif
     25 
     26 #if defined(OS_WIN)
     27 #include <windows.h>
     28 #elif defined(OS_MACOSX)
     29 #include <CoreFoundation/CoreFoundation.h>
     30 #endif
     31 
     32 namespace base {
     33 
     34 typedef FilePath::StringType StringType;
     35 
     36 namespace {
     37 
     38 const char* kCommonDoubleExtensionSuffixes[] = { "gz", "z", "bz2" };
     39 const char* kCommonDoubleExtensions[] = { "user.js" };
     40 
     41 const FilePath::CharType kStringTerminator = FILE_PATH_LITERAL('\0');
     42 
     43 // If this FilePath contains a drive letter specification, returns the
     44 // position of the last character of the drive letter specification,
     45 // otherwise returns npos.  This can only be true on Windows, when a pathname
     46 // begins with a letter followed by a colon.  On other platforms, this always
     47 // returns npos.
     48 StringType::size_type FindDriveLetter(const 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 StringType::npos;
     59 }
     60 
     61 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
     62 bool EqualDriveLetterCaseInsensitive(const StringType& a,
     63                                      const StringType& b) {
     64   size_t a_letter_pos = FindDriveLetter(a);
     65   size_t b_letter_pos = FindDriveLetter(b);
     66 
     67   if (a_letter_pos == StringType::npos || b_letter_pos == StringType::npos)
     68     return a == b;
     69 
     70   StringType a_letter(a.substr(0, a_letter_pos + 1));
     71   StringType b_letter(b.substr(0, b_letter_pos + 1));
     72   if (!StartsWith(a_letter, b_letter, false))
     73     return false;
     74 
     75   StringType a_rest(a.substr(a_letter_pos + 1));
     76   StringType b_rest(b.substr(b_letter_pos + 1));
     77   return a_rest == b_rest;
     78 }
     79 #endif  // defined(FILE_PATH_USES_DRIVE_LETTERS)
     80 
     81 bool IsPathAbsolute(const StringType& path) {
     82 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
     83   StringType::size_type letter = FindDriveLetter(path);
     84   if (letter != StringType::npos) {
     85     // Look for a separator right after the drive specification.
     86     return path.length() > letter + 1 &&
     87         FilePath::IsSeparator(path[letter + 1]);
     88   }
     89   // Look for a pair of leading separators.
     90   return path.length() > 1 &&
     91       FilePath::IsSeparator(path[0]) && FilePath::IsSeparator(path[1]);
     92 #else  // FILE_PATH_USES_DRIVE_LETTERS
     93   // Look for a separator in the first position.
     94   return path.length() > 0 && FilePath::IsSeparator(path[0]);
     95 #endif  // FILE_PATH_USES_DRIVE_LETTERS
     96 }
     97 
     98 bool AreAllSeparators(const StringType& input) {
     99   for (StringType::const_iterator it = input.begin();
    100       it != input.end(); ++it) {
    101     if (!FilePath::IsSeparator(*it))
    102       return false;
    103   }
    104 
    105   return true;
    106 }
    107 
    108 // Find the position of the '.' that separates the extension from the rest
    109 // of the file name. The position is relative to BaseName(), not value().
    110 // Returns npos if it can't find an extension.
    111 StringType::size_type FinalExtensionSeparatorPosition(const StringType& path) {
    112   // Special case "." and ".."
    113   if (path == FilePath::kCurrentDirectory || path == FilePath::kParentDirectory)
    114     return StringType::npos;
    115 
    116   return path.rfind(FilePath::kExtensionSeparator);
    117 }
    118 
    119 // Same as above, but allow a second extension component of up to 4
    120 // characters when the rightmost extension component is a common double
    121 // extension (gz, bz2, Z).  For example, foo.tar.gz or foo.tar.Z would have
    122 // extension components of '.tar.gz' and '.tar.Z' respectively.
    123 StringType::size_type ExtensionSeparatorPosition(const StringType& path) {
    124   const StringType::size_type last_dot = FinalExtensionSeparatorPosition(path);
    125 
    126   // No extension, or the extension is the whole filename.
    127   if (last_dot == StringType::npos || last_dot == 0U)
    128     return last_dot;
    129 
    130   const StringType::size_type penultimate_dot =
    131       path.rfind(FilePath::kExtensionSeparator, last_dot - 1);
    132   const StringType::size_type last_separator =
    133       path.find_last_of(FilePath::kSeparators, last_dot - 1,
    134                         FilePath::kSeparatorsLength - 1);
    135 
    136   if (penultimate_dot == StringType::npos ||
    137       (last_separator != StringType::npos &&
    138        penultimate_dot < last_separator)) {
    139     return last_dot;
    140   }
    141 
    142   for (size_t i = 0; i < arraysize(kCommonDoubleExtensions); ++i) {
    143     StringType extension(path, penultimate_dot + 1);
    144     if (LowerCaseEqualsASCII(extension, kCommonDoubleExtensions[i]))
    145       return penultimate_dot;
    146   }
    147 
    148   StringType extension(path, last_dot + 1);
    149   for (size_t i = 0; i < arraysize(kCommonDoubleExtensionSuffixes); ++i) {
    150     if (LowerCaseEqualsASCII(extension, kCommonDoubleExtensionSuffixes[i])) {
    151       if ((last_dot - penultimate_dot) <= 5U &&
    152           (last_dot - penultimate_dot) > 1U) {
    153         return penultimate_dot;
    154       }
    155     }
    156   }
    157 
    158   return last_dot;
    159 }
    160 
    161 // Returns true if path is "", ".", or "..".
    162 bool IsEmptyOrSpecialCase(const StringType& path) {
    163   // Special cases "", ".", and ".."
    164   if (path.empty() || path == FilePath::kCurrentDirectory ||
    165       path == FilePath::kParentDirectory) {
    166     return true;
    167   }
    168 
    169   return false;
    170 }
    171 
    172 }  // namespace
    173 
    174 FilePath::FilePath() {
    175 }
    176 
    177 FilePath::FilePath(const FilePath& that) : path_(that.path_) {
    178 }
    179 
    180 FilePath::FilePath(const StringType& path) : path_(path) {
    181   StringType::size_type nul_pos = path_.find(kStringTerminator);
    182   if (nul_pos != StringType::npos)
    183     path_.erase(nul_pos, StringType::npos);
    184 }
    185 
    186 FilePath::~FilePath() {
    187 }
    188 
    189 FilePath& FilePath::operator=(const FilePath& that) {
    190   path_ = that.path_;
    191   return *this;
    192 }
    193 
    194 bool FilePath::operator==(const FilePath& that) const {
    195 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
    196   return EqualDriveLetterCaseInsensitive(this->path_, that.path_);
    197 #else  // defined(FILE_PATH_USES_DRIVE_LETTERS)
    198   return path_ == that.path_;
    199 #endif  // defined(FILE_PATH_USES_DRIVE_LETTERS)
    200 }
    201 
    202 bool FilePath::operator!=(const FilePath& that) const {
    203 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
    204   return !EqualDriveLetterCaseInsensitive(this->path_, that.path_);
    205 #else  // defined(FILE_PATH_USES_DRIVE_LETTERS)
    206   return path_ != that.path_;
    207 #endif  // defined(FILE_PATH_USES_DRIVE_LETTERS)
    208 }
    209 
    210 // static
    211 bool FilePath::IsSeparator(CharType character) {
    212   for (size_t i = 0; i < kSeparatorsLength - 1; ++i) {
    213     if (character == kSeparators[i]) {
    214       return true;
    215     }
    216   }
    217 
    218   return false;
    219 }
    220 
    221 void FilePath::GetComponents(std::vector<StringType>* components) const {
    222   DCHECK(components);
    223   if (!components)
    224     return;
    225   components->clear();
    226   if (value().empty())
    227     return;
    228 
    229   std::vector<StringType> ret_val;
    230   FilePath current = *this;
    231   FilePath base;
    232 
    233   // Capture path components.
    234   while (current != current.DirName()) {
    235     base = current.BaseName();
    236     if (!AreAllSeparators(base.value()))
    237       ret_val.push_back(base.value());
    238     current = current.DirName();
    239   }
    240 
    241   // Capture root, if any.
    242   base = current.BaseName();
    243   if (!base.value().empty() && base.value() != kCurrentDirectory)
    244     ret_val.push_back(current.BaseName().value());
    245 
    246   // Capture drive letter, if any.
    247   FilePath dir = current.DirName();
    248   StringType::size_type letter = FindDriveLetter(dir.value());
    249   if (letter != StringType::npos) {
    250     ret_val.push_back(StringType(dir.value(), 0, letter + 1));
    251   }
    252 
    253   *components = std::vector<StringType>(ret_val.rbegin(), ret_val.rend());
    254 }
    255 
    256 bool FilePath::IsParent(const FilePath& child) const {
    257   return AppendRelativePath(child, NULL);
    258 }
    259 
    260 bool FilePath::AppendRelativePath(const FilePath& child,
    261                                   FilePath* path) const {
    262   std::vector<StringType> parent_components;
    263   std::vector<StringType> child_components;
    264   GetComponents(&parent_components);
    265   child.GetComponents(&child_components);
    266 
    267   if (parent_components.empty() ||
    268       parent_components.size() >= child_components.size())
    269     return false;
    270 
    271   std::vector<StringType>::const_iterator parent_comp =
    272       parent_components.begin();
    273   std::vector<StringType>::const_iterator child_comp =
    274       child_components.begin();
    275 
    276 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
    277   // Windows can access case sensitive filesystems, so component
    278   // comparisions must be case sensitive, but drive letters are
    279   // never case sensitive.
    280   if ((FindDriveLetter(*parent_comp) != StringType::npos) &&
    281       (FindDriveLetter(*child_comp) != StringType::npos)) {
    282     if (!StartsWith(*parent_comp, *child_comp, false))
    283       return false;
    284     ++parent_comp;
    285     ++child_comp;
    286   }
    287 #endif  // defined(FILE_PATH_USES_DRIVE_LETTERS)
    288 
    289   while (parent_comp != parent_components.end()) {
    290     if (*parent_comp != *child_comp)
    291       return false;
    292     ++parent_comp;
    293     ++child_comp;
    294   }
    295 
    296   if (path != NULL) {
    297     for (; child_comp != child_components.end(); ++child_comp) {
    298       *path = path->Append(*child_comp);
    299     }
    300   }
    301   return true;
    302 }
    303 
    304 // libgen's dirname and basename aren't guaranteed to be thread-safe and aren't
    305 // guaranteed to not modify their input strings, and in fact are implemented
    306 // differently in this regard on different platforms.  Don't use them, but
    307 // adhere to their behavior.
    308 FilePath FilePath::DirName() const {
    309   FilePath new_path(path_);
    310   new_path.StripTrailingSeparatorsInternal();
    311 
    312   // The drive letter, if any, always needs to remain in the output.  If there
    313   // is no drive letter, as will always be the case on platforms which do not
    314   // support drive letters, letter will be npos, or -1, so the comparisons and
    315   // resizes below using letter will still be valid.
    316   StringType::size_type letter = FindDriveLetter(new_path.path_);
    317 
    318   StringType::size_type last_separator =
    319       new_path.path_.find_last_of(kSeparators, StringType::npos,
    320                                   kSeparatorsLength - 1);
    321   if (last_separator == StringType::npos) {
    322     // path_ is in the current directory.
    323     new_path.path_.resize(letter + 1);
    324   } else if (last_separator == letter + 1) {
    325     // path_ is in the root directory.
    326     new_path.path_.resize(letter + 2);
    327   } else if (last_separator == letter + 2 &&
    328              IsSeparator(new_path.path_[letter + 1])) {
    329     // path_ is in "//" (possibly with a drive letter); leave the double
    330     // separator intact indicating alternate root.
    331     new_path.path_.resize(letter + 3);
    332   } else if (last_separator != 0) {
    333     // path_ is somewhere else, trim the basename.
    334     new_path.path_.resize(last_separator);
    335   }
    336 
    337   new_path.StripTrailingSeparatorsInternal();
    338   if (!new_path.path_.length())
    339     new_path.path_ = kCurrentDirectory;
    340 
    341   return new_path;
    342 }
    343 
    344 FilePath FilePath::BaseName() const {
    345   FilePath new_path(path_);
    346   new_path.StripTrailingSeparatorsInternal();
    347 
    348   // The drive letter, if any, is always stripped.
    349   StringType::size_type letter = FindDriveLetter(new_path.path_);
    350   if (letter != StringType::npos) {
    351     new_path.path_.erase(0, letter + 1);
    352   }
    353 
    354   // Keep everything after the final separator, but if the pathname is only
    355   // one character and it's a separator, leave it alone.
    356   StringType::size_type last_separator =
    357       new_path.path_.find_last_of(kSeparators, StringType::npos,
    358                                   kSeparatorsLength - 1);
    359   if (last_separator != StringType::npos &&
    360       last_separator < new_path.path_.length() - 1) {
    361     new_path.path_.erase(0, last_separator + 1);
    362   }
    363 
    364   return new_path;
    365 }
    366 
    367 StringType FilePath::Extension() const {
    368   FilePath base(BaseName());
    369   const StringType::size_type dot = ExtensionSeparatorPosition(base.path_);
    370   if (dot == StringType::npos)
    371     return StringType();
    372 
    373   return base.path_.substr(dot, StringType::npos);
    374 }
    375 
    376 StringType FilePath::FinalExtension() const {
    377   FilePath base(BaseName());
    378   const StringType::size_type dot = FinalExtensionSeparatorPosition(base.path_);
    379   if (dot == StringType::npos)
    380     return StringType();
    381 
    382   return base.path_.substr(dot, StringType::npos);
    383 }
    384 
    385 FilePath FilePath::RemoveExtension() const {
    386   if (Extension().empty())
    387     return *this;
    388 
    389   const StringType::size_type dot = ExtensionSeparatorPosition(path_);
    390   if (dot == StringType::npos)
    391     return *this;
    392 
    393   return FilePath(path_.substr(0, dot));
    394 }
    395 
    396 FilePath FilePath::RemoveFinalExtension() const {
    397   if (FinalExtension().empty())
    398     return *this;
    399 
    400   const StringType::size_type dot = FinalExtensionSeparatorPosition(path_);
    401   if (dot == StringType::npos)
    402     return *this;
    403 
    404   return FilePath(path_.substr(0, dot));
    405 }
    406 
    407 FilePath FilePath::InsertBeforeExtension(const StringType& suffix) const {
    408   if (suffix.empty())
    409     return FilePath(path_);
    410 
    411   if (IsEmptyOrSpecialCase(BaseName().value()))
    412     return FilePath();
    413 
    414   StringType ext = Extension();
    415   StringType ret = RemoveExtension().value();
    416   ret.append(suffix);
    417   ret.append(ext);
    418   return FilePath(ret);
    419 }
    420 
    421 FilePath FilePath::InsertBeforeExtensionASCII(const StringPiece& suffix)
    422     const {
    423   DCHECK(IsStringASCII(suffix));
    424 #if defined(OS_WIN)
    425   return InsertBeforeExtension(ASCIIToUTF16(suffix.as_string()));
    426 #elif defined(OS_POSIX)
    427   return InsertBeforeExtension(suffix.as_string());
    428 #endif
    429 }
    430 
    431 FilePath FilePath::AddExtension(const StringType& extension) const {
    432   if (IsEmptyOrSpecialCase(BaseName().value()))
    433     return FilePath();
    434 
    435   // If the new extension is "" or ".", then just return the current FilePath.
    436   if (extension.empty() || extension == StringType(1, kExtensionSeparator))
    437     return *this;
    438 
    439   StringType str = path_;
    440   if (extension[0] != kExtensionSeparator &&
    441       *(str.end() - 1) != kExtensionSeparator) {
    442     str.append(1, kExtensionSeparator);
    443   }
    444   str.append(extension);
    445   return FilePath(str);
    446 }
    447 
    448 FilePath FilePath::ReplaceExtension(const StringType& extension) const {
    449   if (IsEmptyOrSpecialCase(BaseName().value()))
    450     return FilePath();
    451 
    452   FilePath no_ext = RemoveExtension();
    453   // If the new extension is "" or ".", then just remove the current extension.
    454   if (extension.empty() || extension == StringType(1, kExtensionSeparator))
    455     return no_ext;
    456 
    457   StringType str = no_ext.value();
    458   if (extension[0] != kExtensionSeparator)
    459     str.append(1, kExtensionSeparator);
    460   str.append(extension);
    461   return FilePath(str);
    462 }
    463 
    464 bool FilePath::MatchesExtension(const StringType& extension) const {
    465   DCHECK(extension.empty() || extension[0] == kExtensionSeparator);
    466 
    467   StringType current_extension = Extension();
    468 
    469   if (current_extension.length() != extension.length())
    470     return false;
    471 
    472   return FilePath::CompareEqualIgnoreCase(extension, current_extension);
    473 }
    474 
    475 FilePath FilePath::Append(const StringType& component) const {
    476   const StringType* appended = &component;
    477   StringType without_nuls;
    478 
    479   StringType::size_type nul_pos = component.find(kStringTerminator);
    480   if (nul_pos != StringType::npos) {
    481     without_nuls = component.substr(0, nul_pos);
    482     appended = &without_nuls;
    483   }
    484 
    485   DCHECK(!IsPathAbsolute(*appended));
    486 
    487   if (path_.compare(kCurrentDirectory) == 0) {
    488     // Append normally doesn't do any normalization, but as a special case,
    489     // when appending to kCurrentDirectory, just return a new path for the
    490     // component argument.  Appending component to kCurrentDirectory would
    491     // serve no purpose other than needlessly lengthening the path, and
    492     // it's likely in practice to wind up with FilePath objects containing
    493     // only kCurrentDirectory when calling DirName on a single relative path
    494     // component.
    495     return FilePath(*appended);
    496   }
    497 
    498   FilePath new_path(path_);
    499   new_path.StripTrailingSeparatorsInternal();
    500 
    501   // Don't append a separator if the path is empty (indicating the current
    502   // directory) or if the path component is empty (indicating nothing to
    503   // append).
    504   if (appended->length() > 0 && new_path.path_.length() > 0) {
    505     // Don't append a separator if the path still ends with a trailing
    506     // separator after stripping (indicating the root directory).
    507     if (!IsSeparator(new_path.path_[new_path.path_.length() - 1])) {
    508       // Don't append a separator if the path is just a drive letter.
    509       if (FindDriveLetter(new_path.path_) + 1 != new_path.path_.length()) {
    510         new_path.path_.append(1, kSeparators[0]);
    511       }
    512     }
    513   }
    514 
    515   new_path.path_.append(*appended);
    516   return new_path;
    517 }
    518 
    519 FilePath FilePath::Append(const FilePath& component) const {
    520   return Append(component.value());
    521 }
    522 
    523 FilePath FilePath::AppendASCII(const StringPiece& component) const {
    524   DCHECK(base::IsStringASCII(component));
    525 #if defined(OS_WIN)
    526   return Append(ASCIIToUTF16(component.as_string()));
    527 #elif defined(OS_POSIX)
    528   return Append(component.as_string());
    529 #endif
    530 }
    531 
    532 bool FilePath::IsAbsolute() const {
    533   return IsPathAbsolute(path_);
    534 }
    535 
    536 bool FilePath::EndsWithSeparator() const {
    537   if (empty())
    538     return false;
    539   return IsSeparator(path_[path_.size() - 1]);
    540 }
    541 
    542 FilePath FilePath::AsEndingWithSeparator() const {
    543   if (EndsWithSeparator() || path_.empty())
    544     return *this;
    545 
    546   StringType path_str;
    547   path_str.reserve(path_.length() + 1);  // Only allocate string once.
    548 
    549   path_str = path_;
    550   path_str.append(&kSeparators[0], 1);
    551   return FilePath(path_str);
    552 }
    553 
    554 FilePath FilePath::StripTrailingSeparators() const {
    555   FilePath new_path(path_);
    556   new_path.StripTrailingSeparatorsInternal();
    557 
    558   return new_path;
    559 }
    560 
    561 bool FilePath::ReferencesParent() const {
    562   std::vector<StringType> components;
    563   GetComponents(&components);
    564 
    565   std::vector<StringType>::const_iterator it = components.begin();
    566   for (; it != components.end(); ++it) {
    567     const StringType& component = *it;
    568     // Windows has odd, undocumented behavior with path components containing
    569     // only whitespace and . characters. So, if all we see is . and
    570     // whitespace, then we treat any .. sequence as referencing parent.
    571     // For simplicity we enforce this on all platforms.
    572     if (component.find_first_not_of(FILE_PATH_LITERAL(". \n\r\t")) ==
    573             std::string::npos &&
    574         component.find(kParentDirectory) != std::string::npos) {
    575       return true;
    576     }
    577   }
    578   return false;
    579 }
    580 
    581 #if defined(OS_POSIX)
    582 // See file_path.h for a discussion of the encoding of paths on POSIX
    583 // platforms.  These encoding conversion functions are not quite correct.
    584 
    585 string16 FilePath::LossyDisplayName() const {
    586   return WideToUTF16(SysNativeMBToWide(path_));
    587 }
    588 
    589 std::string FilePath::MaybeAsASCII() const {
    590   if (base::IsStringASCII(path_))
    591     return path_;
    592   return std::string();
    593 }
    594 
    595 std::string FilePath::AsUTF8Unsafe() const {
    596 #if defined(OS_MACOSX) || defined(OS_CHROMEOS)
    597   return value();
    598 #else
    599   return WideToUTF8(SysNativeMBToWide(value()));
    600 #endif
    601 }
    602 
    603 string16 FilePath::AsUTF16Unsafe() const {
    604 #if defined(OS_MACOSX) || defined(OS_CHROMEOS)
    605   return UTF8ToUTF16(value());
    606 #else
    607   return WideToUTF16(SysNativeMBToWide(value()));
    608 #endif
    609 }
    610 
    611 // static
    612 FilePath FilePath::FromUTF8Unsafe(const std::string& utf8) {
    613 #if defined(OS_MACOSX) || defined(OS_CHROMEOS)
    614   return FilePath(utf8);
    615 #else
    616   return FilePath(SysWideToNativeMB(UTF8ToWide(utf8)));
    617 #endif
    618 }
    619 
    620 // static
    621 FilePath FilePath::FromUTF16Unsafe(const string16& utf16) {
    622 #if defined(OS_MACOSX) || defined(OS_CHROMEOS)
    623   return FilePath(UTF16ToUTF8(utf16));
    624 #else
    625   return FilePath(SysWideToNativeMB(UTF16ToWide(utf16)));
    626 #endif
    627 }
    628 
    629 #elif defined(OS_WIN)
    630 string16 FilePath::LossyDisplayName() const {
    631   return path_;
    632 }
    633 
    634 std::string FilePath::MaybeAsASCII() const {
    635   if (base::IsStringASCII(path_))
    636     return UTF16ToASCII(path_);
    637   return std::string();
    638 }
    639 
    640 std::string FilePath::AsUTF8Unsafe() const {
    641   return WideToUTF8(value());
    642 }
    643 
    644 string16 FilePath::AsUTF16Unsafe() const {
    645   return value();
    646 }
    647 
    648 // static
    649 FilePath FilePath::FromUTF8Unsafe(const std::string& utf8) {
    650   return FilePath(UTF8ToWide(utf8));
    651 }
    652 
    653 // static
    654 FilePath FilePath::FromUTF16Unsafe(const string16& utf16) {
    655   return FilePath(utf16);
    656 }
    657 #endif
    658 
    659 void FilePath::WriteToPickle(Pickle* pickle) const {
    660 #if defined(OS_WIN)
    661   pickle->WriteString16(path_);
    662 #else
    663   pickle->WriteString(path_);
    664 #endif
    665 }
    666 
    667 bool FilePath::ReadFromPickle(PickleIterator* iter) {
    668 #if defined(OS_WIN)
    669   if (!iter->ReadString16(&path_))
    670     return false;
    671 #else
    672   if (!iter->ReadString(&path_))
    673     return false;
    674 #endif
    675 
    676   if (path_.find(kStringTerminator) != StringType::npos)
    677     return false;
    678 
    679   return true;
    680 }
    681 
    682 #if defined(OS_WIN)
    683 // Windows specific implementation of file string comparisons
    684 
    685 int FilePath::CompareIgnoreCase(const StringType& string1,
    686                                 const StringType& string2) {
    687   // Perform character-wise upper case comparison rather than using the
    688   // fully Unicode-aware CompareString(). For details see:
    689   // http://blogs.msdn.com/michkap/archive/2005/10/17/481600.aspx
    690   StringType::const_iterator i1 = string1.begin();
    691   StringType::const_iterator i2 = string2.begin();
    692   StringType::const_iterator string1end = string1.end();
    693   StringType::const_iterator string2end = string2.end();
    694   for ( ; i1 != string1end && i2 != string2end; ++i1, ++i2) {
    695     wchar_t c1 =
    696         (wchar_t)LOWORD(::CharUpperW((LPWSTR)(DWORD_PTR)MAKELONG(*i1, 0)));
    697     wchar_t c2 =
    698         (wchar_t)LOWORD(::CharUpperW((LPWSTR)(DWORD_PTR)MAKELONG(*i2, 0)));
    699     if (c1 < c2)
    700       return -1;
    701     if (c1 > c2)
    702       return 1;
    703   }
    704   if (i1 != string1end)
    705     return 1;
    706   if (i2 != string2end)
    707     return -1;
    708   return 0;
    709 }
    710 
    711 #elif defined(OS_MACOSX)
    712 // Mac OS X specific implementation of file string comparisons
    713 
    714 // cf. http://developer.apple.com/mac/library/technotes/tn/tn1150.html#UnicodeSubtleties
    715 //
    716 // "When using CreateTextEncoding to create a text encoding, you should set
    717 // the TextEncodingBase to kTextEncodingUnicodeV2_0, set the
    718 // TextEncodingVariant to kUnicodeCanonicalDecompVariant, and set the
    719 // TextEncodingFormat to kUnicode16BitFormat. Using these values ensures that
    720 // the Unicode will be in the same form as on an HFS Plus volume, even as the
    721 // Unicode standard evolves."
    722 //
    723 // Another technical article for X 10.4 updates this: one should use
    724 // the new (unambiguous) kUnicodeHFSPlusDecompVariant.
    725 // cf. http://developer.apple.com/mac/library/releasenotes/TextFonts/RN-TEC/index.html
    726 //
    727 // This implementation uses CFStringGetFileSystemRepresentation() to get the
    728 // decomposed form, and an adapted version of the FastUnicodeCompare as
    729 // described in the tech note to compare the strings.
    730 
    731 // Character conversion table for FastUnicodeCompare()
    732 //
    733 // The lower case table consists of a 256-entry high-byte table followed by
    734 // some number of 256-entry subtables. The high-byte table contains either an
    735 // offset to the subtable for characters with that high byte or zero, which
    736 // means that there are no case mappings or ignored characters in that block.
    737 // Ignored characters are mapped to zero.
    738 //
    739 // cf. downloadable file linked in
    740 // http://developer.apple.com/mac/library/technotes/tn/tn1150.html#StringComparisonAlgorithm
    741 
    742 namespace {
    743 
    744 const UInt16 lower_case_table[] = {
    745   // High-byte indices ( == 0 iff no case mapping and no ignorables )
    746 
    747   /* 0 */ 0x0100, 0x0200, 0x0000, 0x0300, 0x0400, 0x0500, 0x0000, 0x0000,
    748           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    749   /* 1 */ 0x0600, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    750           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    751   /* 2 */ 0x0700, 0x0800, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    752           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    753   /* 3 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    754           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    755   /* 4 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    756           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    757   /* 5 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    758           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    759   /* 6 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    760           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    761   /* 7 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    762           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    763   /* 8 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    764           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    765   /* 9 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    766           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    767   /* A */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    768           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    769   /* B */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    770           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    771   /* C */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    772           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    773   /* D */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    774           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    775   /* E */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    776           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    777   /* F */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
    778           0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0900, 0x0A00,
    779 
    780   // Table 1 (for high byte 0x00)
    781 
    782   /* 0 */ 0xFFFF, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
    783           0x0008, 0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x000E, 0x000F,
    784   /* 1 */ 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
    785           0x0018, 0x0019, 0x001A, 0x001B, 0x001C, 0x001D, 0x001E, 0x001F,
    786   /* 2 */ 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
    787           0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F,
    788   /* 3 */ 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
    789           0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E, 0x003F,
    790   /* 4 */ 0x0040, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
    791           0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F,
    792   /* 5 */ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
    793           0x0078, 0x0079, 0x007A, 0x005B, 0x005C, 0x005D, 0x005E, 0x005F,
    794   /* 6 */ 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
    795           0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F,
    796   /* 7 */ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
    797           0x0078, 0x0079, 0x007A, 0x007B, 0x007C, 0x007D, 0x007E, 0x007F,
    798   /* 8 */ 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
    799           0x0088, 0x0089, 0x008A, 0x008B, 0x008C, 0x008D, 0x008E, 0x008F,
    800   /* 9 */ 0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
    801           0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F,
    802   /* A */ 0x00A0, 0x00A1, 0x00A2, 0x00A3, 0x00A4, 0x00A5, 0x00A6, 0x00A7,
    803           0x00A8, 0x00A9, 0x00AA, 0x00AB, 0x00AC, 0x00AD, 0x00AE, 0x00AF,
    804   /* B */ 0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7,
    805           0x00B8, 0x00B9, 0x00BA, 0x00BB, 0x00BC, 0x00BD, 0x00BE, 0x00BF,
    806   /* C */ 0x00C0, 0x00C1, 0x00C2, 0x00C3, 0x00C4, 0x00C5, 0x00E6, 0x00C7,
    807           0x00C8, 0x00C9, 0x00CA, 0x00CB, 0x00CC, 0x00CD, 0x00CE, 0x00CF,
    808   /* D */ 0x00F0, 0x00D1, 0x00D2, 0x00D3, 0x00D4, 0x00D5, 0x00D6, 0x00D7,
    809           0x00F8, 0x00D9, 0x00DA, 0x00DB, 0x00DC, 0x00DD, 0x00FE, 0x00DF,
    810   /* E */ 0x00E0, 0x00E1, 0x00E2, 0x00E3, 0x00E4, 0x00E5, 0x00E6, 0x00E7,
    811           0x00E8, 0x00E9, 0x00EA, 0x00EB, 0x00EC, 0x00ED, 0x00EE, 0x00EF,
    812   /* F */ 0x00F0, 0x00F1, 0x00F2, 0x00F3, 0x00F4, 0x00F5, 0x00F6, 0x00F7,
    813           0x00F8, 0x00F9, 0x00FA, 0x00FB, 0x00FC, 0x00FD, 0x00FE, 0x00FF,
    814 
    815   // Table 2 (for high byte 0x01)
    816 
    817   /* 0 */ 0x0100, 0x0101, 0x0102, 0x0103, 0x0104, 0x0105, 0x0106, 0x0107,
    818           0x0108, 0x0109, 0x010A, 0x010B, 0x010C, 0x010D, 0x010E, 0x010F,
    819   /* 1 */ 0x0111, 0x0111, 0x0112, 0x0113, 0x0114, 0x0115, 0x0116, 0x0117,
    820           0x0118, 0x0119, 0x011A, 0x011B, 0x011C, 0x011D, 0x011E, 0x011F,
    821   /* 2 */ 0x0120, 0x0121, 0x0122, 0x0123, 0x0124, 0x0125, 0x0127, 0x0127,
    822           0x0128, 0x0129, 0x012A, 0x012B, 0x012C, 0x012D, 0x012E, 0x012F,
    823   /* 3 */ 0x0130, 0x0131, 0x0133, 0x0133, 0x0134, 0x0135, 0x0136, 0x0137,
    824           0x0138, 0x0139, 0x013A, 0x013B, 0x013C, 0x013D, 0x013E, 0x0140,
    825   /* 4 */ 0x0140, 0x0142, 0x0142, 0x0143, 0x0144, 0x0145, 0x0146, 0x0147,
    826           0x0148, 0x0149, 0x014B, 0x014B, 0x014C, 0x014D, 0x014E, 0x014F,
    827   /* 5 */ 0x0150, 0x0151, 0x0153, 0x0153, 0x0154, 0x0155, 0x0156, 0x0157,
    828           0x0158, 0x0159, 0x015A, 0x015B, 0x015C, 0x015D, 0x015E, 0x015F,
    829   /* 6 */ 0x0160, 0x0161, 0x0162, 0x0163, 0x0164, 0x0165, 0x0167, 0x0167,
    830           0x0168, 0x0169, 0x016A, 0x016B, 0x016C, 0x016D, 0x016E, 0x016F,
    831   /* 7 */ 0x0170, 0x0171, 0x0172, 0x0173, 0x0174, 0x0175, 0x0176, 0x0177,
    832           0x0178, 0x0179, 0x017A, 0x017B, 0x017C, 0x017D, 0x017E, 0x017F,
    833   /* 8 */ 0x0180, 0x0253, 0x0183, 0x0183, 0x0185, 0x0185, 0x0254, 0x0188,
    834           0x0188, 0x0256, 0x0257, 0x018C, 0x018C, 0x018D, 0x01DD, 0x0259,
    835   /* 9 */ 0x025B, 0x0192, 0x0192, 0x0260, 0x0263, 0x0195, 0x0269, 0x0268,
    836           0x0199, 0x0199, 0x019A, 0x019B, 0x026F, 0x0272, 0x019E, 0x0275,
    837   /* A */ 0x01A0, 0x01A1, 0x01A3, 0x01A3, 0x01A5, 0x01A5, 0x01A6, 0x01A8,
    838           0x01A8, 0x0283, 0x01AA, 0x01AB, 0x01AD, 0x01AD, 0x0288, 0x01AF,
    839   /* B */ 0x01B0, 0x028A, 0x028B, 0x01B4, 0x01B4, 0x01B6, 0x01B6, 0x0292,
    840           0x01B9, 0x01B9, 0x01BA, 0x01BB, 0x01BD, 0x01BD, 0x01BE, 0x01BF,
    841   /* C */ 0x01C0, 0x01C1, 0x01C2, 0x01C3, 0x01C6, 0x01C6, 0x01C6, 0x01C9,
    842           0x01C9, 0x01C9, 0x01CC, 0x01CC, 0x01CC, 0x01CD, 0x01CE, 0x01CF,
    843   /* D */ 0x01D0, 0x01D1, 0x01D2, 0x01D3, 0x01D4, 0x01D5, 0x01D6, 0x01D7,
    844           0x01D8, 0x01D9, 0x01DA, 0x01DB, 0x01DC, 0x01DD, 0x01DE, 0x01DF,
    845   /* E */ 0x01E0, 0x01E1, 0x01E2, 0x01E3, 0x01E5, 0x01E5, 0x01E6, 0x01E7,
    846           0x01E8, 0x01E9, 0x01EA, 0x01EB, 0x01EC, 0x01ED, 0x01EE, 0x01EF,
    847   /* F */ 0x01F0, 0x01F3, 0x01F3, 0x01F3, 0x01F4, 0x01F5, 0x01F6, 0x01F7,
    848           0x01F8, 0x01F9, 0x01FA, 0x01FB, 0x01FC, 0x01FD, 0x01FE, 0x01FF,
    849 
    850   // Table 3 (for high byte 0x03)
    851 
    852   /* 0 */ 0x0300, 0x0301, 0x0302, 0x0303, 0x0304, 0x0305, 0x0306, 0x0307,
    853           0x0308, 0x0309, 0x030A, 0x030B, 0x030C, 0x030D, 0x030E, 0x030F,
    854   /* 1 */ 0x0310, 0x0311, 0x0312, 0x0313, 0x0314, 0x0315, 0x0316, 0x0317,
    855           0x0318, 0x0319, 0x031A, 0x031B, 0x031C, 0x031D, 0x031E, 0x031F,
    856   /* 2 */ 0x0320, 0x0321, 0x0322, 0x0323, 0x0324, 0x0325, 0x0326, 0x0327,
    857           0x0328, 0x0329, 0x032A, 0x032B, 0x032C, 0x032D, 0x032E, 0x032F,
    858   /* 3 */ 0x0330, 0x0331, 0x0332, 0x0333, 0x0334, 0x0335, 0x0336, 0x0337,
    859           0x0338, 0x0339, 0x033A, 0x033B, 0x033C, 0x033D, 0x033E, 0x033F,
    860   /* 4 */ 0x0340, 0x0341, 0x0342, 0x0343, 0x0344, 0x0345, 0x0346, 0x0347,
    861           0x0348, 0x0349, 0x034A, 0x034B, 0x034C, 0x034D, 0x034E, 0x034F,
    862   /* 5 */ 0x0350, 0x0351, 0x0352, 0x0353, 0x0354, 0x0355, 0x0356, 0x0357,
    863           0x0358, 0x0359, 0x035A, 0x035B, 0x035C, 0x035D, 0x035E, 0x035F,
    864   /* 6 */ 0x0360, 0x0361, 0x0362, 0x0363, 0x0364, 0x0365, 0x0366, 0x0367,
    865           0x0368, 0x0369, 0x036A, 0x036B, 0x036C, 0x036D, 0x036E, 0x036F,
    866   /* 7 */ 0x0370, 0x0371, 0x0372, 0x0373, 0x0374, 0x0375, 0x0376, 0x0377,
    867           0x0378, 0x0379, 0x037A, 0x037B, 0x037C, 0x037D, 0x037E, 0x037F,
    868   /* 8 */ 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386, 0x0387,
    869           0x0388, 0x0389, 0x038A, 0x038B, 0x038C, 0x038D, 0x038E, 0x038F,
    870   /* 9 */ 0x0390, 0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, 0x03B6, 0x03B7,
    871           0x03B8, 0x03B9, 0x03BA, 0x03BB, 0x03BC, 0x03BD, 0x03BE, 0x03BF,
    872   /* A */ 0x03C0, 0x03C1, 0x03A2, 0x03C3, 0x03C4, 0x03C5, 0x03C6, 0x03C7,
    873           0x03C8, 0x03C9, 0x03AA, 0x03AB, 0x03AC, 0x03AD, 0x03AE, 0x03AF,
    874   /* B */ 0x03B0, 0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, 0x03B6, 0x03B7,
    875           0x03B8, 0x03B9, 0x03BA, 0x03BB, 0x03BC, 0x03BD, 0x03BE, 0x03BF,
    876   /* C */ 0x03C0, 0x03C1, 0x03C2, 0x03C3, 0x03C4, 0x03C5, 0x03C6, 0x03C7,
    877           0x03C8, 0x03C9, 0x03CA, 0x03CB, 0x03CC, 0x03CD, 0x03CE, 0x03CF,
    878   /* D */ 0x03D0, 0x03D1, 0x03D2, 0x03D3, 0x03D4, 0x03D5, 0x03D6, 0x03D7,
    879           0x03D8, 0x03D9, 0x03DA, 0x03DB, 0x03DC, 0x03DD, 0x03DE, 0x03DF,
    880   /* E */ 0x03E0, 0x03E1, 0x03E3, 0x03E3, 0x03E5, 0x03E5, 0x03E7, 0x03E7,
    881           0x03E9, 0x03E9, 0x03EB, 0x03EB, 0x03ED, 0x03ED, 0x03EF, 0x03EF,
    882   /* F */ 0x03F0, 0x03F1, 0x03F2, 0x03F3, 0x03F4, 0x03F5, 0x03F6, 0x03F7,
    883           0x03F8, 0x03F9, 0x03FA, 0x03FB, 0x03FC, 0x03FD, 0x03FE, 0x03FF,
    884 
    885   // Table 4 (for high byte 0x04)
    886 
    887   /* 0 */ 0x0400, 0x0401, 0x0452, 0x0403, 0x0454, 0x0455, 0x0456, 0x0407,
    888           0x0458, 0x0459, 0x045A, 0x045B, 0x040C, 0x040D, 0x040E, 0x045F,
    889   /* 1 */ 0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437,
    890           0x0438, 0x0419, 0x043A, 0x043B, 0x043C, 0x043D, 0x043E, 0x043F,
    891   /* 2 */ 0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447,
    892           0x0448, 0x0449, 0x044A, 0x044B, 0x044C, 0x044D, 0x044E, 0x044F,
    893   /* 3 */ 0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437,
    894           0x0438, 0x0439, 0x043A, 0x043B, 0x043C, 0x043D, 0x043E, 0x043F,
    895   /* 4 */ 0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447,
    896           0x0448, 0x0449, 0x044A, 0x044B, 0x044C, 0x044D, 0x044E, 0x044F,
    897   /* 5 */ 0x0450, 0x0451, 0x0452, 0x0453, 0x0454, 0x0455, 0x0456, 0x0457,
    898           0x0458, 0x0459, 0x045A, 0x045B, 0x045C, 0x045D, 0x045E, 0x045F,
    899   /* 6 */ 0x0461, 0x0461, 0x0463, 0x0463, 0x0465, 0x0465, 0x0467, 0x0467,
    900           0x0469, 0x0469, 0x046B, 0x046B, 0x046D, 0x046D, 0x046F, 0x046F,
    901   /* 7 */ 0x0471, 0x0471, 0x0473, 0x0473, 0x0475, 0x0475, 0x0476, 0x0477,
    902           0x0479, 0x0479, 0x047B, 0x047B, 0x047D, 0x047D, 0x047F, 0x047F,
    903   /* 8 */ 0x0481, 0x0481, 0x0482, 0x0483, 0x0484, 0x0485, 0x0486, 0x0487,
    904           0x0488, 0x0489, 0x048A, 0x048B, 0x048C, 0x048D, 0x048E, 0x048F,
    905   /* 9 */ 0x0491, 0x0491, 0x0493, 0x0493, 0x0495, 0x0495, 0x0497, 0x0497,
    906           0x0499, 0x0499, 0x049B, 0x049B, 0x049D, 0x049D, 0x049F, 0x049F,
    907   /* A */ 0x04A1, 0x04A1, 0x04A3, 0x04A3, 0x04A5, 0x04A5, 0x04A7, 0x04A7,
    908           0x04A9, 0x04A9, 0x04AB, 0x04AB, 0x04AD, 0x04AD, 0x04AF, 0x04AF,
    909   /* B */ 0x04B1, 0x04B1, 0x04B3, 0x04B3, 0x04B5, 0x04B5, 0x04B7, 0x04B7,
    910           0x04B9, 0x04B9, 0x04BB, 0x04BB, 0x04BD, 0x04BD, 0x04BF, 0x04BF,
    911   /* C */ 0x04C0, 0x04C1, 0x04C2, 0x04C4, 0x04C4, 0x04C5, 0x04C6, 0x04C8,
    912           0x04C8, 0x04C9, 0x04CA, 0x04CC, 0x04CC, 0x04CD, 0x04CE, 0x04CF,
    913   /* D */ 0x04D0, 0x04D1, 0x04D2, 0x04D3, 0x04D4, 0x04D5, 0x04D6, 0x04D7,
    914           0x04D8, 0x04D9, 0x04DA, 0x04DB, 0x04DC, 0x04DD, 0x04DE, 0x04DF,
    915   /* E */ 0x04E0, 0x04E1, 0x04E2, 0x04E3, 0x04E4, 0x04E5, 0x04E6, 0x04E7,
    916           0x04E8, 0x04E9, 0x04EA, 0x04EB, 0x04EC, 0x04ED, 0x04EE, 0x04EF,
    917   /* F */ 0x04F0, 0x04F1, 0x04F2, 0x04F3, 0x04F4, 0x04F5, 0x04F6, 0x04F7,
    918           0x04F8, 0x04F9, 0x04FA, 0x04FB, 0x04FC, 0x04FD, 0x04FE, 0x04FF,
    919 
    920   // Table 5 (for high byte 0x05)
    921 
    922   /* 0 */ 0x0500, 0x0501, 0x0502, 0x0503, 0x0504, 0x0505, 0x0506, 0x0507,
    923           0x0508, 0x0509, 0x050A, 0x050B, 0x050C, 0x050D, 0x050E, 0x050F,
    924   /* 1 */ 0x0510, 0x0511, 0x0512, 0x0513, 0x0514, 0x0515, 0x0516, 0x0517,
    925           0x0518, 0x0519, 0x051A, 0x051B, 0x051C, 0x051D, 0x051E, 0x051F,
    926   /* 2 */ 0x0520, 0x0521, 0x0522, 0x0523, 0x0524, 0x0525, 0x0526, 0x0527,
    927           0x0528, 0x0529, 0x052A, 0x052B, 0x052C, 0x052D, 0x052E, 0x052F,
    928   /* 3 */ 0x0530, 0x0561, 0x0562, 0x0563, 0x0564, 0x0565, 0x0566, 0x0567,
    929           0x0568, 0x0569, 0x056A, 0x056B, 0x056C, 0x056D, 0x056E, 0x056F,
    930   /* 4 */ 0x0570, 0x0571, 0x0572, 0x0573, 0x0574, 0x0575, 0x0576, 0x0577,
    931           0x0578, 0x0579, 0x057A, 0x057B, 0x057C, 0x057D, 0x057E, 0x057F,
    932   /* 5 */ 0x0580, 0x0581, 0x0582, 0x0583, 0x0584, 0x0585, 0x0586, 0x0557,
    933           0x0558, 0x0559, 0x055A, 0x055B, 0x055C, 0x055D, 0x055E, 0x055F,
    934   /* 6 */ 0x0560, 0x0561, 0x0562, 0x0563, 0x0564, 0x0565, 0x0566, 0x0567,
    935           0x0568, 0x0569, 0x056A, 0x056B, 0x056C, 0x056D, 0x056E, 0x056F,
    936   /* 7 */ 0x0570, 0x0571, 0x0572, 0x0573, 0x0574, 0x0575, 0x0576, 0x0577,
    937           0x0578, 0x0579, 0x057A, 0x057B, 0x057C, 0x057D, 0x057E, 0x057F,
    938   /* 8 */ 0x0580, 0x0581, 0x0582, 0x0583, 0x0584, 0x0585, 0x0586, 0x0587,
    939           0x0588, 0x0589, 0x058A, 0x058B, 0x058C, 0x058D, 0x058E, 0x058F,
    940   /* 9 */ 0x0590, 0x0591, 0x0592, 0x0593, 0x0594, 0x0595, 0x0596, 0x0597,
    941           0x0598, 0x0599, 0x059A, 0x059B, 0x059C, 0x059D, 0x059E, 0x059F,
    942   /* A */ 0x05A0, 0x05A1, 0x05A2, 0x05A3, 0x05A4, 0x05A5, 0x05A6, 0x05A7,
    943           0x05A8, 0x05A9, 0x05AA, 0x05AB, 0x05AC, 0x05AD, 0x05AE, 0x05AF,
    944   /* B */ 0x05B0, 0x05B1, 0x05B2, 0x05B3, 0x05B4, 0x05B5, 0x05B6, 0x05B7,
    945           0x05B8, 0x05B9, 0x05BA, 0x05BB, 0x05BC, 0x05BD, 0x05BE, 0x05BF,
    946   /* C */ 0x05C0, 0x05C1, 0x05C2, 0x05C3, 0x05C4, 0x05C5, 0x05C6, 0x05C7,
    947           0x05C8, 0x05C9, 0x05CA, 0x05CB, 0x05CC, 0x05CD, 0x05CE, 0x05CF,
    948   /* D */ 0x05D0, 0x05D1, 0x05D2, 0x05D3, 0x05D4, 0x05D5, 0x05D6, 0x05D7,
    949           0x05D8, 0x05D9, 0x05DA, 0x05DB, 0x05DC, 0x05DD, 0x05DE, 0x05DF,
    950   /* E */ 0x05E0, 0x05E1, 0x05E2, 0x05E3, 0x05E4, 0x05E5, 0x05E6, 0x05E7,
    951           0x05E8, 0x05E9, 0x05EA, 0x05EB, 0x05EC, 0x05ED, 0x05EE, 0x05EF,
    952   /* F */ 0x05F0, 0x05F1, 0x05F2, 0x05F3, 0x05F4, 0x05F5, 0x05F6, 0x05F7,
    953           0x05F8, 0x05F9, 0x05FA, 0x05FB, 0x05FC, 0x05FD, 0x05FE, 0x05FF,
    954 
    955   // Table 6 (for high byte 0x10)
    956 
    957   /* 0 */ 0x1000, 0x1001, 0x1002, 0x1003, 0x1004, 0x1005, 0x1006, 0x1007,
    958           0x1008, 0x1009, 0x100A, 0x100B, 0x100C, 0x100D, 0x100E, 0x100F,
    959   /* 1 */ 0x1010, 0x1011, 0x1012, 0x1013, 0x1014, 0x1015, 0x1016, 0x1017,
    960           0x1018, 0x1019, 0x101A, 0x101B, 0x101C, 0x101D, 0x101E, 0x101F,
    961   /* 2 */ 0x1020, 0x1021, 0x1022, 0x1023, 0x1024, 0x1025, 0x1026, 0x1027,
    962           0x1028, 0x1029, 0x102A, 0x102B, 0x102C, 0x102D, 0x102E, 0x102F,
    963   /* 3 */ 0x1030, 0x1031, 0x1032, 0x1033, 0x1034, 0x1035, 0x1036, 0x1037,
    964           0x1038, 0x1039, 0x103A, 0x103B, 0x103C, 0x103D, 0x103E, 0x103F,
    965   /* 4 */ 0x1040, 0x1041, 0x1042, 0x1043, 0x1044, 0x1045, 0x1046, 0x1047,
    966           0x1048, 0x1049, 0x104A, 0x104B, 0x104C, 0x104D, 0x104E, 0x104F,
    967   /* 5 */ 0x1050, 0x1051, 0x1052, 0x1053, 0x1054, 0x1055, 0x1056, 0x1057,
    968           0x1058, 0x1059, 0x105A, 0x105B, 0x105C, 0x105D, 0x105E, 0x105F,
    969   /* 6 */ 0x1060, 0x1061, 0x1062, 0x1063, 0x1064, 0x1065, 0x1066, 0x1067,
    970           0x1068, 0x1069, 0x106A, 0x106B, 0x106C, 0x106D, 0x106E, 0x106F,
    971   /* 7 */ 0x1070, 0x1071, 0x1072, 0x1073, 0x1074, 0x1075, 0x1076, 0x1077,
    972           0x1078, 0x1079, 0x107A, 0x107B, 0x107C, 0x107D, 0x107E, 0x107F,
    973   /* 8 */ 0x1080, 0x1081, 0x1082, 0x1083, 0x1084, 0x1085, 0x1086, 0x1087,
    974           0x1088, 0x1089, 0x108A, 0x108B, 0x108C, 0x108D, 0x108E, 0x108F,
    975   /* 9 */ 0x1090, 0x1091, 0x1092, 0x1093, 0x1094, 0x1095, 0x1096, 0x1097,
    976           0x1098, 0x1099, 0x109A, 0x109B, 0x109C, 0x109D, 0x109E, 0x109F,
    977   /* A */ 0x10D0, 0x10D1, 0x10D2, 0x10D3, 0x10D4, 0x10D5, 0x10D6, 0x10D7,
    978           0x10D8, 0x10D9, 0x10DA, 0x10DB, 0x10DC, 0x10DD, 0x10DE, 0x10DF,
    979   /* B */ 0x10E0, 0x10E1, 0x10E2, 0x10E3, 0x10E4, 0x10E5, 0x10E6, 0x10E7,
    980           0x10E8, 0x10E9, 0x10EA, 0x10EB, 0x10EC, 0x10ED, 0x10EE, 0x10EF,
    981   /* C */ 0x10F0, 0x10F1, 0x10F2, 0x10F3, 0x10F4, 0x10F5, 0x10C6, 0x10C7,
    982           0x10C8, 0x10C9, 0x10CA, 0x10CB, 0x10CC, 0x10CD, 0x10CE, 0x10CF,
    983   /* D */ 0x10D0, 0x10D1, 0x10D2, 0x10D3, 0x10D4, 0x10D5, 0x10D6, 0x10D7,
    984           0x10D8, 0x10D9, 0x10DA, 0x10DB, 0x10DC, 0x10DD, 0x10DE, 0x10DF,
    985   /* E */ 0x10E0, 0x10E1, 0x10E2, 0x10E3, 0x10E4, 0x10E5, 0x10E6, 0x10E7,
    986           0x10E8, 0x10E9, 0x10EA, 0x10EB, 0x10EC, 0x10ED, 0x10EE, 0x10EF,
    987   /* F */ 0x10F0, 0x10F1, 0x10F2, 0x10F3, 0x10F4, 0x10F5, 0x10F6, 0x10F7,
    988           0x10F8, 0x10F9, 0x10FA, 0x10FB, 0x10FC, 0x10FD, 0x10FE, 0x10FF,
    989 
    990   // Table 7 (for high byte 0x20)
    991 
    992   /* 0 */ 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007,
    993           0x2008, 0x2009, 0x200A, 0x200B, 0x0000, 0x0000, 0x0000, 0x0000,
    994   /* 1 */ 0x2010, 0x2011, 0x2012, 0x2013, 0x2014, 0x2015, 0x2016, 0x2017,
    995           0x2018, 0x2019, 0x201A, 0x201B, 0x201C, 0x201D, 0x201E, 0x201F,
    996   /* 2 */ 0x2020, 0x2021, 0x2022, 0x2023, 0x2024, 0x2025, 0x2026, 0x2027,
    997           0x2028, 0x2029, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x202F,
    998   /* 3 */ 0x2030, 0x2031, 0x2032, 0x2033, 0x2034, 0x2035, 0x2036, 0x2037,
    999           0x2038, 0x2039, 0x203A, 0x203B, 0x203C, 0x203D, 0x203E, 0x203F,
   1000   /* 4 */ 0x2040, 0x2041, 0x2042, 0x2043, 0x2044, 0x2045, 0x2046, 0x2047,
   1001           0x2048, 0x2049, 0x204A, 0x204B, 0x204C, 0x204D, 0x204E, 0x204F,
   1002   /* 5 */ 0x2050, 0x2051, 0x2052, 0x2053, 0x2054, 0x2055, 0x2056, 0x2057,
   1003           0x2058, 0x2059, 0x205A, 0x205B, 0x205C, 0x205D, 0x205E, 0x205F,
   1004   /* 6 */ 0x2060, 0x2061, 0x2062, 0x2063, 0x2064, 0x2065, 0x2066, 0x2067,
   1005           0x2068, 0x2069, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
   1006   /* 7 */ 0x2070, 0x2071, 0x2072, 0x2073, 0x2074, 0x2075, 0x2076, 0x2077,
   1007           0x2078, 0x2079, 0x207A, 0x207B, 0x207C, 0x207D, 0x207E, 0x207F,
   1008   /* 8 */ 0x2080, 0x2081, 0x2082, 0x2083, 0x2084, 0x2085, 0x2086, 0x2087,
   1009           0x2088, 0x2089, 0x208A, 0x208B, 0x208C, 0x208D, 0x208E, 0x208F,
   1010   /* 9 */ 0x2090, 0x2091, 0x2092, 0x2093, 0x2094, 0x2095, 0x2096, 0x2097,
   1011           0x2098, 0x2099, 0x209A, 0x209B, 0x209C, 0x209D, 0x209E, 0x209F,
   1012   /* A */ 0x20A0, 0x20A1, 0x20A2, 0x20A3, 0x20A4, 0x20A5, 0x20A6, 0x20A7,
   1013           0x20A8, 0x20A9, 0x20AA, 0x20AB, 0x20AC, 0x20AD, 0x20AE, 0x20AF,
   1014   /* B */ 0x20B0, 0x20B1, 0x20B2, 0x20B3, 0x20B4, 0x20B5, 0x20B6, 0x20B7,
   1015           0x20B8, 0x20B9, 0x20BA, 0x20BB, 0x20BC, 0x20BD, 0x20BE, 0x20BF,
   1016   /* C */ 0x20C0, 0x20C1, 0x20C2, 0x20C3, 0x20C4, 0x20C5, 0x20C6, 0x20C7,
   1017           0x20C8, 0x20C9, 0x20CA, 0x20CB, 0x20CC, 0x20CD, 0x20CE, 0x20CF,
   1018   /* D */ 0x20D0, 0x20D1, 0x20D2, 0x20D3, 0x20D4, 0x20D5, 0x20D6, 0x20D7,
   1019           0x20D8, 0x20D9, 0x20DA, 0x20DB, 0x20DC, 0x20DD, 0x20DE, 0x20DF,
   1020   /* E */ 0x20E0, 0x20E1, 0x20E2, 0x20E3, 0x20E4, 0x20E5, 0x20E6, 0x20E7,
   1021           0x20E8, 0x20E9, 0x20EA, 0x20EB, 0x20EC, 0x20ED, 0x20EE, 0x20EF,
   1022   /* F */ 0x20F0, 0x20F1, 0x20F2, 0x20F3, 0x20F4, 0x20F5, 0x20F6, 0x20F7,
   1023           0x20F8, 0x20F9, 0x20FA, 0x20FB, 0x20FC, 0x20FD, 0x20FE, 0x20FF,
   1024 
   1025   // Table 8 (for high byte 0x21)
   1026 
   1027   /* 0 */ 0x2100, 0x2101, 0x2102, 0x2103, 0x2104, 0x2105, 0x2106, 0x2107,
   1028           0x2108, 0x2109, 0x210A, 0x210B, 0x210C, 0x210D, 0x210E, 0x210F,
   1029   /* 1 */ 0x2110, 0x2111, 0x2112, 0x2113, 0x2114, 0x2115, 0x2116, 0x2117,
   1030           0x2118, 0x2119, 0x211A, 0x211B, 0x211C, 0x211D, 0x211E, 0x211F,
   1031   /* 2 */ 0x2120, 0x2121, 0x2122, 0x2123, 0x2124, 0x2125, 0x2126, 0x2127,
   1032           0x2128, 0x2129, 0x212A, 0x212B, 0x212C, 0x212D, 0x212E, 0x212F,
   1033   /* 3 */ 0x2130, 0x2131, 0x2132, 0x2133, 0x2134, 0x2135, 0x2136, 0x2137,
   1034           0x2138, 0x2139, 0x213A, 0x213B, 0x213C, 0x213D, 0x213E, 0x213F,
   1035   /* 4 */ 0x2140, 0x2141, 0x2142, 0x2143, 0x2144, 0x2145, 0x2146, 0x2147,
   1036           0x2148, 0x2149, 0x214A, 0x214B, 0x214C, 0x214D, 0x214E, 0x214F,
   1037   /* 5 */ 0x2150, 0x2151, 0x2152, 0x2153, 0x2154, 0x2155, 0x2156, 0x2157,
   1038           0x2158, 0x2159, 0x215A, 0x215B, 0x215C, 0x215D, 0x215E, 0x215F,
   1039   /* 6 */ 0x2170, 0x2171, 0x2172, 0x2173, 0x2174, 0x2175, 0x2176, 0x2177,
   1040           0x2178, 0x2179, 0x217A, 0x217B, 0x217C, 0x217D, 0x217E, 0x217F,
   1041   /* 7 */ 0x2170, 0x2171, 0x2172, 0x2173, 0x2174, 0x2175, 0x2176, 0x2177,
   1042           0x2178, 0x2179, 0x217A, 0x217B, 0x217C, 0x217D, 0x217E, 0x217F,
   1043   /* 8 */ 0x2180, 0x2181, 0x2182, 0x2183, 0x2184, 0x2185, 0x2186, 0x2187,
   1044           0x2188, 0x2189, 0x218A, 0x218B, 0x218C, 0x218D, 0x218E, 0x218F,
   1045   /* 9 */ 0x2190, 0x2191, 0x2192, 0x2193, 0x2194, 0x2195, 0x2196, 0x2197,
   1046           0x2198, 0x2199, 0x219A, 0x219B, 0x219C, 0x219D, 0x219E, 0x219F,
   1047   /* A */ 0x21A0, 0x21A1, 0x21A2, 0x21A3, 0x21A4, 0x21A5, 0x21A6, 0x21A7,
   1048           0x21A8, 0x21A9, 0x21AA, 0x21AB, 0x21AC, 0x21AD, 0x21AE, 0x21AF,
   1049   /* B */ 0x21B0, 0x21B1, 0x21B2, 0x21B3, 0x21B4, 0x21B5, 0x21B6, 0x21B7,
   1050           0x21B8, 0x21B9, 0x21BA, 0x21BB, 0x21BC, 0x21BD, 0x21BE, 0x21BF,
   1051   /* C */ 0x21C0, 0x21C1, 0x21C2, 0x21C3, 0x21C4, 0x21C5, 0x21C6, 0x21C7,
   1052           0x21C8, 0x21C9, 0x21CA, 0x21CB, 0x21CC, 0x21CD, 0x21CE, 0x21CF,
   1053   /* D */ 0x21D0, 0x21D1, 0x21D2, 0x21D3, 0x21D4, 0x21D5, 0x21D6, 0x21D7,
   1054           0x21D8, 0x21D9, 0x21DA, 0x21DB, 0x21DC, 0x21DD, 0x21DE, 0x21DF,
   1055   /* E */ 0x21E0, 0x21E1, 0x21E2, 0x21E3, 0x21E4, 0x21E5, 0x21E6, 0x21E7,
   1056           0x21E8, 0x21E9, 0x21EA, 0x21EB, 0x21EC, 0x21ED, 0x21EE, 0x21EF,
   1057   /* F */ 0x21F0, 0x21F1, 0x21F2, 0x21F3, 0x21F4, 0x21F5, 0x21F6, 0x21F7,
   1058           0x21F8, 0x21F9, 0x21FA, 0x21FB, 0x21FC, 0x21FD, 0x21FE, 0x21FF,
   1059 
   1060   // Table 9 (for high byte 0xFE)
   1061 
   1062   /* 0 */ 0xFE00, 0xFE01, 0xFE02, 0xFE03, 0xFE04, 0xFE05, 0xFE06, 0xFE07,
   1063           0xFE08, 0xFE09, 0xFE0A, 0xFE0B, 0xFE0C, 0xFE0D, 0xFE0E, 0xFE0F,
   1064   /* 1 */ 0xFE10, 0xFE11, 0xFE12, 0xFE13, 0xFE14, 0xFE15, 0xFE16, 0xFE17,
   1065           0xFE18, 0xFE19, 0xFE1A, 0xFE1B, 0xFE1C, 0xFE1D, 0xFE1E, 0xFE1F,
   1066   /* 2 */ 0xFE20, 0xFE21, 0xFE22, 0xFE23, 0xFE24, 0xFE25, 0xFE26, 0xFE27,
   1067           0xFE28, 0xFE29, 0xFE2A, 0xFE2B, 0xFE2C, 0xFE2D, 0xFE2E, 0xFE2F,
   1068   /* 3 */ 0xFE30, 0xFE31, 0xFE32, 0xFE33, 0xFE34, 0xFE35, 0xFE36, 0xFE37,
   1069           0xFE38, 0xFE39, 0xFE3A, 0xFE3B, 0xFE3C, 0xFE3D, 0xFE3E, 0xFE3F,
   1070   /* 4 */ 0xFE40, 0xFE41, 0xFE42, 0xFE43, 0xFE44, 0xFE45, 0xFE46, 0xFE47,
   1071           0xFE48, 0xFE49, 0xFE4A, 0xFE4B, 0xFE4C, 0xFE4D, 0xFE4E, 0xFE4F,
   1072   /* 5 */ 0xFE50, 0xFE51, 0xFE52, 0xFE53, 0xFE54, 0xFE55, 0xFE56, 0xFE57,
   1073           0xFE58, 0xFE59, 0xFE5A, 0xFE5B, 0xFE5C, 0xFE5D, 0xFE5E, 0xFE5F,
   1074   /* 6 */ 0xFE60, 0xFE61, 0xFE62, 0xFE63, 0xFE64, 0xFE65, 0xFE66, 0xFE67,
   1075           0xFE68, 0xFE69, 0xFE6A, 0xFE6B, 0xFE6C, 0xFE6D, 0xFE6E, 0xFE6F,
   1076   /* 7 */ 0xFE70, 0xFE71, 0xFE72, 0xFE73, 0xFE74, 0xFE75, 0xFE76, 0xFE77,
   1077           0xFE78, 0xFE79, 0xFE7A, 0xFE7B, 0xFE7C, 0xFE7D, 0xFE7E, 0xFE7F,
   1078   /* 8 */ 0xFE80, 0xFE81, 0xFE82, 0xFE83, 0xFE84, 0xFE85, 0xFE86, 0xFE87,
   1079           0xFE88, 0xFE89, 0xFE8A, 0xFE8B, 0xFE8C, 0xFE8D, 0xFE8E, 0xFE8F,
   1080   /* 9 */ 0xFE90, 0xFE91, 0xFE92, 0xFE93, 0xFE94, 0xFE95, 0xFE96, 0xFE97,
   1081           0xFE98, 0xFE99, 0xFE9A, 0xFE9B, 0xFE9C, 0xFE9D, 0xFE9E, 0xFE9F,
   1082   /* A */ 0xFEA0, 0xFEA1, 0xFEA2, 0xFEA3, 0xFEA4, 0xFEA5, 0xFEA6, 0xFEA7,
   1083           0xFEA8, 0xFEA9, 0xFEAA, 0xFEAB, 0xFEAC, 0xFEAD, 0xFEAE, 0xFEAF,
   1084   /* B */ 0xFEB0, 0xFEB1, 0xFEB2, 0xFEB3, 0xFEB4, 0xFEB5, 0xFEB6, 0xFEB7,
   1085           0xFEB8, 0xFEB9, 0xFEBA, 0xFEBB, 0xFEBC, 0xFEBD, 0xFEBE, 0xFEBF,
   1086   /* C */ 0xFEC0, 0xFEC1, 0xFEC2, 0xFEC3, 0xFEC4, 0xFEC5, 0xFEC6, 0xFEC7,
   1087           0xFEC8, 0xFEC9, 0xFECA, 0xFECB, 0xFECC, 0xFECD, 0xFECE, 0xFECF,
   1088   /* D */ 0xFED0, 0xFED1, 0xFED2, 0xFED3, 0xFED4, 0xFED5, 0xFED6, 0xFED7,
   1089           0xFED8, 0xFED9, 0xFEDA, 0xFEDB, 0xFEDC, 0xFEDD, 0xFEDE, 0xFEDF,
   1090   /* E */ 0xFEE0, 0xFEE1, 0xFEE2, 0xFEE3, 0xFEE4, 0xFEE5, 0xFEE6, 0xFEE7,
   1091           0xFEE8, 0xFEE9, 0xFEEA, 0xFEEB, 0xFEEC, 0xFEED, 0xFEEE, 0xFEEF,
   1092   /* F */ 0xFEF0, 0xFEF1, 0xFEF2, 0xFEF3, 0xFEF4, 0xFEF5, 0xFEF6, 0xFEF7,
   1093           0xFEF8, 0xFEF9, 0xFEFA, 0xFEFB, 0xFEFC, 0xFEFD, 0xFEFE, 0x0000,
   1094 
   1095   // Table 10 (for high byte 0xFF)
   1096 
   1097   /* 0 */ 0xFF00, 0xFF01, 0xFF02, 0xFF03, 0xFF04, 0xFF05, 0xFF06, 0xFF07,
   1098           0xFF08, 0xFF09, 0xFF0A, 0xFF0B, 0xFF0C, 0xFF0D, 0xFF0E, 0xFF0F,
   1099   /* 1 */ 0xFF10, 0xFF11, 0xFF12, 0xFF13, 0xFF14, 0xFF15, 0xFF16, 0xFF17,
   1100           0xFF18, 0xFF19, 0xFF1A, 0xFF1B, 0xFF1C, 0xFF1D, 0xFF1E, 0xFF1F,
   1101   /* 2 */ 0xFF20, 0xFF41, 0xFF42, 0xFF43, 0xFF44, 0xFF45, 0xFF46, 0xFF47,
   1102           0xFF48, 0xFF49, 0xFF4A, 0xFF4B, 0xFF4C, 0xFF4D, 0xFF4E, 0xFF4F,
   1103   /* 3 */ 0xFF50, 0xFF51, 0xFF52, 0xFF53, 0xFF54, 0xFF55, 0xFF56, 0xFF57,
   1104           0xFF58, 0xFF59, 0xFF5A, 0xFF3B, 0xFF3C, 0xFF3D, 0xFF3E, 0xFF3F,
   1105   /* 4 */ 0xFF40, 0xFF41, 0xFF42, 0xFF43, 0xFF44, 0xFF45, 0xFF46, 0xFF47,
   1106           0xFF48, 0xFF49, 0xFF4A, 0xFF4B, 0xFF4C, 0xFF4D, 0xFF4E, 0xFF4F,
   1107   /* 5 */ 0xFF50, 0xFF51, 0xFF52, 0xFF53, 0xFF54, 0xFF55, 0xFF56, 0xFF57,
   1108           0xFF58, 0xFF59, 0xFF5A, 0xFF5B, 0xFF5C, 0xFF5D, 0xFF5E, 0xFF5F,
   1109   /* 6 */ 0xFF60, 0xFF61, 0xFF62, 0xFF63, 0xFF64, 0xFF65, 0xFF66, 0xFF67,
   1110           0xFF68, 0xFF69, 0xFF6A, 0xFF6B, 0xFF6C, 0xFF6D, 0xFF6E, 0xFF6F,
   1111   /* 7 */ 0xFF70, 0xFF71, 0xFF72, 0xFF73, 0xFF74, 0xFF75, 0xFF76, 0xFF77,
   1112           0xFF78, 0xFF79, 0xFF7A, 0xFF7B, 0xFF7C, 0xFF7D, 0xFF7E, 0xFF7F,
   1113   /* 8 */ 0xFF80, 0xFF81, 0xFF82, 0xFF83, 0xFF84, 0xFF85, 0xFF86, 0xFF87,
   1114           0xFF88, 0xFF89, 0xFF8A, 0xFF8B, 0xFF8C, 0xFF8D, 0xFF8E, 0xFF8F,
   1115   /* 9 */ 0xFF90, 0xFF91, 0xFF92, 0xFF93, 0xFF94, 0xFF95, 0xFF96, 0xFF97,
   1116           0xFF98, 0xFF99, 0xFF9A, 0xFF9B, 0xFF9C, 0xFF9D, 0xFF9E, 0xFF9F,
   1117   /* A */ 0xFFA0, 0xFFA1, 0xFFA2, 0xFFA3, 0xFFA4, 0xFFA5, 0xFFA6, 0xFFA7,
   1118           0xFFA8, 0xFFA9, 0xFFAA, 0xFFAB, 0xFFAC, 0xFFAD, 0xFFAE, 0xFFAF,
   1119   /* B */ 0xFFB0, 0xFFB1, 0xFFB2, 0xFFB3, 0xFFB4, 0xFFB5, 0xFFB6, 0xFFB7,
   1120           0xFFB8, 0xFFB9, 0xFFBA, 0xFFBB, 0xFFBC, 0xFFBD, 0xFFBE, 0xFFBF,
   1121   /* C */ 0xFFC0, 0xFFC1, 0xFFC2, 0xFFC3, 0xFFC4, 0xFFC5, 0xFFC6, 0xFFC7,
   1122           0xFFC8, 0xFFC9, 0xFFCA, 0xFFCB, 0xFFCC, 0xFFCD, 0xFFCE, 0xFFCF,
   1123   /* D */ 0xFFD0, 0xFFD1, 0xFFD2, 0xFFD3, 0xFFD4, 0xFFD5, 0xFFD6, 0xFFD7,
   1124           0xFFD8, 0xFFD9, 0xFFDA, 0xFFDB, 0xFFDC, 0xFFDD, 0xFFDE, 0xFFDF,
   1125   /* E */ 0xFFE0, 0xFFE1, 0xFFE2, 0xFFE3, 0xFFE4, 0xFFE5, 0xFFE6, 0xFFE7,
   1126           0xFFE8, 0xFFE9, 0xFFEA, 0xFFEB, 0xFFEC, 0xFFED, 0xFFEE, 0xFFEF,
   1127   /* F */ 0xFFF0, 0xFFF1, 0xFFF2, 0xFFF3, 0xFFF4, 0xFFF5, 0xFFF6, 0xFFF7,
   1128           0xFFF8, 0xFFF9, 0xFFFA, 0xFFFB, 0xFFFC, 0xFFFD, 0xFFFE, 0xFFFF,
   1129 };
   1130 
   1131 // Returns the next non-ignorable codepoint within string starting from the
   1132 // position indicated by index, or zero if there are no more.
   1133 // The passed-in index is automatically advanced as the characters in the input
   1134 // HFS-decomposed UTF-8 strings are read.
   1135 inline int HFSReadNextNonIgnorableCodepoint(const char* string,
   1136                                             int length,
   1137                                             int* index) {
   1138   int codepoint = 0;
   1139   while (*index < length && codepoint == 0) {
   1140     // CBU8_NEXT returns a value < 0 in error cases. For purposes of string
   1141     // comparison, we just use that value and flag it with DCHECK.
   1142     CBU8_NEXT(string, *index, length, codepoint);
   1143     DCHECK_GT(codepoint, 0);
   1144     if (codepoint > 0) {
   1145       // Check if there is a subtable for this upper byte.
   1146       int lookup_offset = lower_case_table[codepoint >> 8];
   1147       if (lookup_offset != 0)
   1148         codepoint = lower_case_table[lookup_offset + (codepoint & 0x00FF)];
   1149       // Note: codepoint1 may be again 0 at this point if the character was
   1150       // an ignorable.
   1151     }
   1152   }
   1153   return codepoint;
   1154 }
   1155 
   1156 }  // anonymous namespace
   1157 
   1158 // Special UTF-8 version of FastUnicodeCompare. Cf:
   1159 // http://developer.apple.com/mac/library/technotes/tn/tn1150.html#StringComparisonAlgorithm
   1160 // The input strings must be in the special HFS decomposed form.
   1161 int FilePath::HFSFastUnicodeCompare(const StringType& string1,
   1162                                     const StringType& string2) {
   1163   int length1 = string1.length();
   1164   int length2 = string2.length();
   1165   int index1 = 0;
   1166   int index2 = 0;
   1167 
   1168   for (;;) {
   1169     int codepoint1 = HFSReadNextNonIgnorableCodepoint(string1.c_str(),
   1170                                                       length1,
   1171                                                       &index1);
   1172     int codepoint2 = HFSReadNextNonIgnorableCodepoint(string2.c_str(),
   1173                                                       length2,
   1174                                                       &index2);
   1175     if (codepoint1 != codepoint2)
   1176       return (codepoint1 < codepoint2) ? -1 : 1;
   1177     if (codepoint1 == 0) {
   1178       DCHECK_EQ(index1, length1);
   1179       DCHECK_EQ(index2, length2);
   1180       return 0;
   1181     }
   1182   }
   1183 }
   1184 
   1185 StringType FilePath::GetHFSDecomposedForm(const StringType& string) {
   1186   ScopedCFTypeRef<CFStringRef> cfstring(
   1187       CFStringCreateWithBytesNoCopy(
   1188           NULL,
   1189           reinterpret_cast<const UInt8*>(string.c_str()),
   1190           string.length(),
   1191           kCFStringEncodingUTF8,
   1192           false,
   1193           kCFAllocatorNull));
   1194   // Query the maximum length needed to store the result. In most cases this
   1195   // will overestimate the required space. The return value also already
   1196   // includes the space needed for a terminating 0.
   1197   CFIndex length = CFStringGetMaximumSizeOfFileSystemRepresentation(cfstring);
   1198   DCHECK_GT(length, 0);  // should be at least 1 for the 0-terminator.
   1199   // Reserve enough space for CFStringGetFileSystemRepresentation to write into.
   1200   // Also set the length to the maximum so that we can shrink it later.
   1201   // (Increasing rather than decreasing it would clobber the string contents!)
   1202   StringType result;
   1203   result.reserve(length);
   1204   result.resize(length - 1);
   1205   Boolean success = CFStringGetFileSystemRepresentation(cfstring,
   1206                                                         &result[0],
   1207                                                         length);
   1208   if (success) {
   1209     // Reduce result.length() to actual string length.
   1210     result.resize(strlen(result.c_str()));
   1211   } else {
   1212     // An error occurred -> clear result.
   1213     result.clear();
   1214   }
   1215   return result;
   1216 }
   1217 
   1218 int FilePath::CompareIgnoreCase(const StringType& string1,
   1219                                 const StringType& string2) {
   1220   // Quick checks for empty strings - these speed things up a bit and make the
   1221   // following code cleaner.
   1222   if (string1.empty())
   1223     return string2.empty() ? 0 : -1;
   1224   if (string2.empty())
   1225     return 1;
   1226 
   1227   StringType hfs1 = GetHFSDecomposedForm(string1);
   1228   StringType hfs2 = GetHFSDecomposedForm(string2);
   1229 
   1230   // GetHFSDecomposedForm() returns an empty string in an error case.
   1231   if (hfs1.empty() || hfs2.empty()) {
   1232     NOTREACHED();
   1233     ScopedCFTypeRef<CFStringRef> cfstring1(
   1234         CFStringCreateWithBytesNoCopy(
   1235             NULL,
   1236             reinterpret_cast<const UInt8*>(string1.c_str()),
   1237             string1.length(),
   1238             kCFStringEncodingUTF8,
   1239             false,
   1240             kCFAllocatorNull));
   1241     ScopedCFTypeRef<CFStringRef> cfstring2(
   1242         CFStringCreateWithBytesNoCopy(
   1243             NULL,
   1244             reinterpret_cast<const UInt8*>(string2.c_str()),
   1245             string2.length(),
   1246             kCFStringEncodingUTF8,
   1247             false,
   1248             kCFAllocatorNull));
   1249     return CFStringCompare(cfstring1,
   1250                            cfstring2,
   1251                            kCFCompareCaseInsensitive);
   1252   }
   1253 
   1254   return HFSFastUnicodeCompare(hfs1, hfs2);
   1255 }
   1256 
   1257 #else  // << WIN. MACOSX | other (POSIX) >>
   1258 
   1259 // Generic (POSIX) implementation of file string comparison.
   1260 // TODO(rolandsteiner) check if this is sufficient/correct.
   1261 int FilePath::CompareIgnoreCase(const StringType& string1,
   1262                                 const StringType& string2) {
   1263   int comparison = strcasecmp(string1.c_str(), string2.c_str());
   1264   if (comparison < 0)
   1265     return -1;
   1266   if (comparison > 0)
   1267     return 1;
   1268   return 0;
   1269 }
   1270 
   1271 #endif  // OS versions of CompareIgnoreCase()
   1272 
   1273 
   1274 void FilePath::StripTrailingSeparatorsInternal() {
   1275   // If there is no drive letter, start will be 1, which will prevent stripping
   1276   // the leading separator if there is only one separator.  If there is a drive
   1277   // letter, start will be set appropriately to prevent stripping the first
   1278   // separator following the drive letter, if a separator immediately follows
   1279   // the drive letter.
   1280   StringType::size_type start = FindDriveLetter(path_) + 2;
   1281 
   1282   StringType::size_type last_stripped = StringType::npos;
   1283   for (StringType::size_type pos = path_.length();
   1284        pos > start && IsSeparator(path_[pos - 1]);
   1285        --pos) {
   1286     // If the string only has two separators and they're at the beginning,
   1287     // don't strip them, unless the string began with more than two separators.
   1288     if (pos != start + 1 || last_stripped == start + 2 ||
   1289         !IsSeparator(path_[start - 1])) {
   1290       path_.resize(pos - 1);
   1291       last_stripped = pos;
   1292     }
   1293   }
   1294 }
   1295 
   1296 FilePath FilePath::NormalizePathSeparators() const {
   1297   return NormalizePathSeparatorsTo(kSeparators[0]);
   1298 }
   1299 
   1300 FilePath FilePath::NormalizePathSeparatorsTo(CharType separator) const {
   1301 #if defined(FILE_PATH_USES_WIN_SEPARATORS)
   1302   DCHECK_NE(kSeparators + kSeparatorsLength,
   1303             std::find(kSeparators, kSeparators + kSeparatorsLength, separator));
   1304   StringType copy = path_;
   1305   for (size_t i = 0; i < kSeparatorsLength; ++i) {
   1306     std::replace(copy.begin(), copy.end(), kSeparators[i], separator);
   1307   }
   1308   return FilePath(copy);
   1309 #else
   1310   return *this;
   1311 #endif
   1312 }
   1313 
   1314 #if defined(OS_ANDROID)
   1315 bool FilePath::IsContentUri() const {
   1316   return StartsWithASCII(path_, "content://", false /*case_sensitive*/);
   1317 }
   1318 #endif
   1319 
   1320 }  // namespace base
   1321 
   1322 void PrintTo(const base::FilePath& path, std::ostream* out) {
   1323   *out << path.value();
   1324 }
   1325