Implement VMS FTP directory listing parser.

net/ftp/ftp_directory_listing_parsers.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.  Use of this
 // source code is governed by a BSD-style license that can be found in the
 // LICENSE file.
 
 #ifndef NET_FTP_FTP_DIRECTORY_LISTING_PARSERS_H_
 #define NET_FTP_FTP_DIRECTORY_LISTING_PARSERS_H_
 
 #include <queue>
 
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "base/time.h"
 #include "net/ftp/ftp_server_type_histograms.h"
 
 namespace net {
-  
+
 struct FtpDirectoryListingEntry {
   enum Type {
     FILE,
     DIRECTORY,
     SYMLINK,
   };
-  
+
   Type type;
   string16 name;
   int64 size;  // File size, in bytes. -1 if not applicable.
-  
+
   // Last modified time, in local time zone.
   base::Time last_modified;
 };
 
 class FtpDirectoryListingParser {
  public:
   virtual ~FtpDirectoryListingParser();
-  
+
   // Adds |line| to the internal parsing buffer. Returns true on success.
   virtual bool ConsumeLine(const string16& line) = 0;
-  
+
   // Returns true if there is at least one FtpDirectoryListingEntry available.
   virtual bool EntryAvailable() const = 0;
-  
+
   // Returns the next entry. It is an error to call this function unless
   // EntryAvailable returns true.
   virtual FtpDirectoryListingEntry PopEntry() = 0;
 };
-  
+
+// Parser for "ls -l"-style directory listing.
 class FtpLsDirectoryListingParser : public FtpDirectoryListingParser {
  public:
   FtpLsDirectoryListingParser();
-  
+
   // FtpDirectoryListingParser methods:
   virtual bool ConsumeLine(const string16& line);
   virtual bool EntryAvailable() const;
   virtual FtpDirectoryListingEntry PopEntry();
-  
+
  private:
   std::queue<FtpDirectoryListingEntry> entries_;
-  
+
   DISALLOW_COPY_AND_ASSIGN(FtpLsDirectoryListingParser);
 };
-  
+
+// Parser for VMS-style directory listing (including variants).
+class FtpVmsDirectoryListingParser : public FtpDirectoryListingParser {
+ public:
+  FtpVmsDirectoryListingParser();
+
+  // FtpDirectoryListingParser methods:
+  virtual bool ConsumeLine(const string16& line);
+  virtual bool EntryAvailable() const;
+  virtual FtpDirectoryListingEntry PopEntry();
+
+ private:
+  // Consumes listing line which is expected to be a directory listing entry
+  // (and not a comment etc). Returns true on success.
+  bool ConsumeEntryLine(const string16& line);
+
+  enum State {
+    STATE_INITIAL,
+
+    // Indicates that we have received the header, like this:
+    // Directory SYS$SYSDEVICE:[ANONYMOUS]
+    STATE_RECEIVED_HEADER,
+
+    // Indicates that we have received the first listing entry, like this:
+    // MADGOAT.DIR;1              2   9-MAY-2001 22:23:44.85
+    STATE_ENTRIES,
+
+    // Indicates that we have received the last listing entry.
+    STATE_RECEIVED_LAST_ENTRY,
+
+    // Indicates that we have successfully received all parts of the listing.
+    STATE_END,
+  } state_;
+
+  // VMS can use two physical lines if the filename is long. The first line will
+  // contain the filename, and the second line everything else. Store the
+  // filename until we receive the next line.
+  string16 last_filename_;
+  bool last_is_directory_;
+
+  std::queue<FtpDirectoryListingEntry> entries_;
+
+  DISALLOW_COPY_AND_ASSIGN(FtpVmsDirectoryListingParser);
+};
+
 }  // namespace net
 
 #endif  // NET_FTP_FTP_DIRECTORY_LISTING_PARSERS_H_