X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Ffile_group.cc;h=3e8a7b79c43177a8d775889ab91d08855bb0e77e;hb=73713b742a2be95ea736d2d3d889f5b535a0f0f1;hp=d364a395d6a6d2f5ad986e2e7c9ffcaf81fcd9e4;hpb=d302d45c2102b8fc97bbd256b43fa74119cc9332;p=dcpomatic.git

diff --git a/src/lib/file_group.cc b/src/lib/file_group.cc
index d364a395d..3e8a7b79c 100644
--- a/src/lib/file_group.cc
+++ b/src/lib/file_group.cc
@@ -1,38 +1,57 @@
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2018 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
-    This program is distributed in the hope that it will be useful,
+    DCP-o-matic is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
-#include <cstdio>
-#include <sndfile.h>
+/** @file  src/lib/file_group.cc
+ *  @brief FileGroup class.
+ */
+
 #include "file_group.h"
 #include "exceptions.h"
+#include "cross.h"
+#include "compose.hpp"
+#include <sndfile.h>
+#include <cstdio>
+#include <iostream>
 
 using std::vector;
 using std::cout;
 
+/** Construct a FileGroup with no files */
+FileGroup::FileGroup ()
+	: _current_path (0)
+	, _current_file (0)
+{
+
+}
+
+/** Construct a FileGroup with a single file */
 FileGroup::FileGroup (boost::filesystem::path p)
 	: _current_path (0)
 	, _current_file (0)
 {
 	_paths.push_back (p);
+	ensure_open_path (0);
 	seek (0, SEEK_SET);
 }
 
+/** Construct a FileGroup with multiple files */
 FileGroup::FileGroup (vector<boost::filesystem::path> const & p)
 	: _paths (p)
 	, _current_path (0)
@@ -42,6 +61,7 @@ FileGroup::FileGroup (vector<boost::filesystem::path> const & p)
 	seek (0, SEEK_SET);
 }
 
+/** Destroy a FileGroup, closing any open file */
 FileGroup::~FileGroup ()
 {
 	if (_current_file) {
@@ -49,6 +69,13 @@ FileGroup::~FileGroup ()
 	}
 }
 
+void
+FileGroup::set_paths (vector<boost::filesystem::path> const & p)
+{
+	_paths = p;
+	ensure_open_path (0);
+	seek (0, SEEK_SET);
+}
 
 /** Ensure that the given path index in the content is the _current_file */
 void
@@ -58,23 +85,21 @@ FileGroup::ensure_open_path (size_t p) const
 		/* Already open */
 		return;
 	}
-	
+
 	if (_current_file) {
 		fclose (_current_file);
 	}
 
 	_current_path = p;
-	_current_file = fopen (_paths[_current_path].string().c_str(), "rb");
+	_current_file = fopen_boost (_paths[_current_path], "rb");
 	if (_current_file == 0) {
-		throw OpenFileError (_paths[_current_path]);
+		throw OpenFileError (_paths[_current_path], errno, OpenFileError::READ);
 	}
 }
 
 int64_t
 FileGroup::seek (int64_t pos, int whence) const
 {
-	int64_t const len = length ();
-	
 	/* Convert pos to `full_pos', which is an offset from the start
 	   of all the files.
 	*/
@@ -87,11 +112,15 @@ FileGroup::seek (int64_t pos, int whence) const
 		for (size_t i = 0; i < _current_path; ++i) {
 			full_pos += boost::filesystem::file_size (_paths[i]);
 		}
+#ifdef DCPOMATIC_WINDOWS
+		full_pos += _ftelli64 (_current_file);
+#else
 		full_pos += ftell (_current_file);
+#endif
 		full_pos += pos;
 		break;
 	case SEEK_END:
-		full_pos = len - pos;
+		full_pos = length() - pos;
 		break;
 	}
 
@@ -112,20 +141,20 @@ FileGroup::seek (int64_t pos, int whence) const
 	}
 
 	ensure_open_path (i);
-	fseek (_current_file, sub_pos, SEEK_SET);
+	dcpomatic_fseek (_current_file, sub_pos, SEEK_SET);
 	return full_pos;
 }
 
 /** Try to read some data from the current position into a buffer.
  *  @param buffer Buffer to write data into.
  *  @param amount Number of bytes to read.
- *  @return Number of bytes read, or -1 in the case of error.
+ *  @return Number of bytes read.
  */
 int
 FileGroup::read (uint8_t* buffer, int amount) const
 {
 	int read = 0;
-	while (1) {
+	while (true) {
 		int const this_time = fread (buffer + read, 1, amount - read, _current_file);
 		read += this_time;
 		if (read == amount) {
@@ -133,16 +162,23 @@ FileGroup::read (uint8_t* buffer, int amount) const
 			break;
 		}
 
-		/* See if there is another file to use */
-		if ((_current_path + 1) >= _paths.size()) {
-			break;
+		if (ferror(_current_file)) {
+			throw FileError (String::compose("fread error %1", errno), _paths[_current_path]);
+		}
+
+		if (feof (_current_file)) {
+			/* See if there is another file to use */
+			if ((_current_path + 1) >= _paths.size()) {
+				break;
+			}
+			ensure_open_path (_current_path + 1);
 		}
-		ensure_open_path (_current_path + 1);
 	}
 
 	return read;
 }
 
+/** @return Combined length of all the files */
 int64_t
 FileGroup::length () const
 {