2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
29 using boost::shared_ptr;
31 /** @param file Filename to write log to */
32 FileLog::FileLog (boost::filesystem::path file)
39 FileLog::do_log (shared_ptr<const LogEntry> entry)
41 FILE* f = fopen_boost (_file, "a");
43 cout << "(could not log to " << _file.string() << "): " << entry.get() << "\n";
47 fprintf (f, "%s\n", entry->get().c_str ());
52 FileLog::head_and_tail (int amount) const
54 boost::mutex::scoped_lock lm (_mutex);
56 uintmax_t head_amount = amount;
57 uintmax_t tail_amount = amount;
58 uintmax_t size = boost::filesystem::file_size (_file);
60 if (size < (head_amount + tail_amount)) {
65 FILE* f = fopen_boost (_file, "r");
72 char* buffer = new char[max(head_amount, tail_amount) + 1];
74 int N = fread (buffer, 1, head_amount, f);
76 out += string (buffer);
78 if (tail_amount > 0) {
79 out += "\n .\n .\n .\n";
81 fseek (f, - tail_amount - 1, SEEK_END);
83 N = fread (buffer, 1, tail_amount, f);
85 out += string (buffer) + "\n";