1 files changed, 101 insertions, 0 deletions
diff --git a/libplatform/io/FileSystem.cpp b/libplatform/io/FileSystem.cpp
new file mode 100644
index 0000000..762511f
--- /dev/null
+++ b/libplatform/io/FileSystem.cpp
@@ -0,0 +1,101 @@
+#include "libplatform/impl.h"
+
+namespace mp4v2 { namespace platform { namespace io {
+
+///////////////////////////////////////////////////////////////////////////////
+
+void
+FileSystem::pathnameCleanup( string& name )
+{
+    string bad;
+
+    // fold repeating directory separators
+    bad = DIR_SEPARATOR;
+    bad += DIR_SEPARATOR;
+    for( string::size_type pos = name.find( bad );
+         pos != string::npos;
+         pos = name.find( bad, pos ) )
+    {
+        name.replace( pos, bad.length(), DIR_SEPARATOR );
+    }
+
+    // replace occurances of /./ with /
+    bad = DIR_SEPARATOR;
+    bad += '.';
+    bad += DIR_SEPARATOR;
+    for( string::size_type pos = name.find( bad );
+         pos != string::npos;
+         pos = name.find( bad, pos ) )
+    {
+        name.replace( pos, bad.length(), DIR_SEPARATOR );
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+void
+FileSystem::pathnameOnlyExtension( string& name )
+{
+    // compute basename
+    string::size_type dot_pos = name.rfind( '.' );
+    string::size_type slash_pos = name.rfind( DIR_SEPARATOR );
+
+    // dot_pos must be after slash_pos
+    if( slash_pos != string::npos && dot_pos < slash_pos )
+        dot_pos = string::npos;
+
+    // return empty-string if no dot
+    if( dot_pos == string::npos ) {
+        name.resize( 0 );
+        return;
+    }
+
+    name = name.substr( dot_pos + 1 );
+    pathnameCleanup( name );
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+void
+FileSystem::pathnameStripExtension( string& name )
+{
+    pathnameCleanup( name );
+
+    // compute basename
+    string::size_type dot_pos = name.rfind( '.' );
+    string::size_type slash_pos = name.rfind( DIR_SEPARATOR );
+
+    // dot_pos must be after slash_pos
+    if( slash_pos != string::npos && dot_pos < slash_pos )
+        dot_pos = string::npos;
+
+    // chop extension
+    if( dot_pos != string::npos )
+        name.resize( dot_pos );
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+void
+FileSystem::pathnameTemp( string& name, string dir, string prefix, string suffix )
+{
+    ostringstream buf;
+    buf << dir;
+
+    // add dir separator if needed
+    if( !dir.empty() ) {
+        buf << dir;
+        if( dir[dir.length()-1] != '/' )
+            buf << '/';
+    }
+
+    buf << prefix;
+    buf << setfill('0') << setw(8) << number::random32();
+    buf << suffix;
+
+    name = buf.str();
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+}}} // namespace mp4v2::platform::io