libs/pbd/pbd/file_archive.h

   1 /*
   2  * Copyright (C) 2016 Robin Gareus <robin@gareus.org>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  *
  18  */
  19 #ifndef _pbd_archive_h_
  20 #define _pbd_archive_h_
  21
  22 #include <pthread.h>
  23
  24 #include "pbd/signals.h"
  25
  26 #ifndef LIBPBD_API
  27 #include "pbd/libpbd_visibility.h"
  28 #endif
  29
  30
  31 namespace PBD {
  32
  33 class LIBPBD_API FileArchive
  34 {
  35         public:
  36                 FileArchive (const std::string& url);
  37
  38                 int inflate (const std::string& destdir);
  39                 std::vector<std::string> contents ();
  40
  41                 /* these are mapped to libarchive's lzmaz
  42                  * compression level 0..9
  43                  */
  44                 enum CompressionLevel {
  45                         CompressNone = -1,
  46                         CompressFast = 0,
  47                         CompressGood = 6
  48                 };
  49
  50                 int create (const std::string& srcdir, CompressionLevel compression_level = CompressGood);
  51                 int create (const std::map <std::string, std::string>& filemap, CompressionLevel compression_level = CompressGood);
  52
  53                 PBD::Signal2<void, size_t, size_t> progress; // TODO
  54
  55                 struct MemPipe {
  56                         public:
  57                                 MemPipe ()
  58                                         : data (NULL)
  59                                         , progress (0)
  60                                 {
  61                                         pthread_mutex_init (&_lock, NULL);
  62                                         pthread_cond_init (&_ready, NULL);
  63                                         reset ();
  64                                 }
  65
  66                                 ~MemPipe ()
  67                                 {
  68                                         lock ();
  69                                         free (data);
  70                                         unlock ();
  71
  72                                         pthread_mutex_destroy (&_lock);
  73                                         pthread_cond_destroy (&_ready);
  74                                 }
  75
  76                                 void reset ()
  77                                 {
  78                                         lock ();
  79                                         free (data);
  80                                         data = 0;
  81                                         size = 0;
  82                                         done = false;
  83                                         processed = 0;
  84                                         length = -1;
  85                                         unlock ();
  86                                 }
  87
  88                                 void lock ()   { pthread_mutex_lock (&_lock); }
  89                                 void unlock () { pthread_mutex_unlock (&_lock); }
  90                                 void signal () { pthread_cond_signal (&_ready); }
  91                                 void wait ()   { pthread_cond_wait (&_ready, &_lock); }
  92
  93                                 uint8_t  buf[8192];
  94                                 uint8_t* data;
  95                                 size_t   size;
  96                                 bool     done;
  97
  98                                 double   processed;
  99                                 double   length;
 100                                 FileArchive* progress;
 101
 102                         private:
 103                                 pthread_mutex_t _lock;
 104                                 pthread_cond_t  _ready;
 105                 };
 106
 107                 struct Request {
 108                         public:
 109                                 Request (const std::string& u)
 110                                 {
 111                                         if (u.size () > 0) {
 112                                                 url = strdup (u.c_str());
 113                                         } else {
 114                                                 url = NULL;
 115                                         }
 116                                 }
 117
 118                                 ~Request ()
 119                                 {
 120                                         free (url);
 121                                 }
 122
 123                                 bool is_remote () const
 124                                 {
 125                                         if (!strncmp (url, "https://", 8) || !strncmp (url, "http://", 7) || !strncmp (url, "ftp://", 6)) {
 126                                                 return true;
 127                                         }
 128                                         return false;
 129                                 }
 130
 131                                 char* url;
 132                                 MemPipe mp;
 133                 };
 134
 135         private:
 136
 137                 int process_file ();
 138                 int process_url ();
 139
 140                 std::vector<std::string> contents_url ();
 141                 std::vector<std::string> contents_file ();
 142
 143                 int extract_url ();
 144                 int extract_file ();
 145
 146                 int do_extract (struct archive* a);
 147                 std::vector<std::string> get_contents (struct archive *a);
 148
 149                 bool is_url ();
 150
 151                 Request   _req;
 152                 pthread_t _tid;
 153 };
 154
 155 } /* namespace */
 156 #endif // _reallocpool_h_