diff options
| author | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2008-07-11 15:50:46 +0000 |
|---|---|---|
| committer | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2008-07-11 15:50:46 +0000 |
| commit | 14c7f45cdae826f88dc539c8c38dd95caf305731 (patch) | |
| tree | 832da054b7cfb2dc6fd63339af736625f31d21aa /utils/zenutils/source/shared/file.cpp | |
| parent | 7c84ede3781c27db73403bd6302f320c76a58c8c (diff) | |
Add zook's ZenUtils to SVN
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18010 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'utils/zenutils/source/shared/file.cpp')
| -rwxr-xr-x | utils/zenutils/source/shared/file.cpp | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/utils/zenutils/source/shared/file.cpp b/utils/zenutils/source/shared/file.cpp new file mode 100755 index 0000000000..2c31498972 --- /dev/null +++ b/utils/zenutils/source/shared/file.cpp @@ -0,0 +1,106 @@ +/* zenutils - Utilities for working with creative firmwares.
+ * Copyright 2007 (c) Rasmus Ry <rasmus.ry{at}gmail.com>
+ *
+ * This program 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,
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "file.h"
+#include <fstream>
+
+
+bool shared::read_file(const std::string& filename, bytes& buffer,
+ std::streampos offset, std::streamsize count)
+{
+ std::ifstream ifs;
+ ifs.open(filename.c_str(), std::ios::binary);
+ if (!ifs)
+ {
+ return false;
+ }
+
+ std::ifstream::pos_type startpos = offset;
+ ifs.seekg(offset, std::ios::beg);
+ if (count == -1)
+ ifs.seekg(0, std::ios::end);
+ else
+ ifs.seekg(count, std::ios::cur);
+ std::ifstream::pos_type endpos = ifs.tellg();
+
+ buffer.resize(endpos-startpos);
+ ifs.seekg(offset, std::ios::beg);
+
+ ifs.read((char*)&buffer[0], endpos-startpos);
+
+ ifs.close();
+ return ifs.good();
+}
+
+
+bool shared::write_file(const std::string& filename, bytes& buffer,
+ bool truncate, std::streampos offset,
+ std::streamsize count)
+{
+ std::ios::openmode mode = std::ios::in|std::ios::out|std::ios::binary;
+ if (truncate)
+ mode |= std::ios::trunc;
+
+ std::fstream ofs;
+ ofs.open(filename.c_str(), mode);
+ if (!ofs)
+ {
+ return false;
+ }
+
+ if (count == -1)
+ count = buffer.size();
+ else if (count > buffer.size())
+ return false;
+
+ ofs.seekg(offset, std::ios::beg);
+
+ ofs.write((char*)&buffer[0], count);
+
+ ofs.close();
+ return ofs.good();
+}
+
+bool shared::file_exists(const std::string& filename)
+{
+ std::ifstream ifs;
+ ifs.open(filename.c_str(), std::ios::in);
+ if (ifs.is_open())
+ {
+ ifs.close();
+ return true;
+ }
+ return false;
+}
+
+bool shared::copy_file(const std::string& srcname, const std::string& dstname)
+{
+ bytes buffer;
+ if (!read_file(srcname, buffer))
+ return false;
+ return write_file(dstname, buffer, true);
+}
+
+bool shared::backup_file(const std::string& filename, bool force)
+{
+ std::string backupname = filename + ".bak";
+ if (!force)
+ if (file_exists(backupname))
+ return true;
+ return copy_file(filename, backupname);
+}
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