1 files changed, 13 insertions, 2 deletions
diff --git a/lib/cdutils.cpp b/lib/cdutils.cpp
index e4d7749..1049535 100644
--- a/lib/cdutils.cpp
+++ b/lib/cdutils.cpp
@@ -60,10 +60,12 @@ unsigned long from_MSF(unsigned long msf, unsigned long start) {
     return from_MSF(m, s, f, start);
 }
 
-Output * open_ppf(String ppf, Handle * iso, String comment) {
+Handle * open_ppf(String ppf, Handle * iso, String comment) throw (GeneralException) {
     int i, l;
     Byte buffer[1024];
 
+    if (ppf_file)
+	throw GeneralException("Tried to open_ppf() while already opened.");
     ppf_file = new Output(ppf);
     ppf_file->write("PPF20\001", 6);
     
@@ -112,6 +114,15 @@ void write_ppf(Byte * old_sec, Byte * new_sec, int sec_num) {
     }
 }
 
+void close_ppf() throw (GeneralException) {
+    if (ppf_file) {
+	delete ppf_file;
+	ppf_file = 0;
+    } else {
+	throw GeneralException("Tried to close_ppf() without previous opening");
+    }
+}
+
 String format_date(String input) {
     String output;
     
@@ -162,7 +173,7 @@ int guess_type(Handle * f_iso, int number) {
 }
 
 void sector_seek(Handle * f_iso, long sector) {
-    f_iso->seek(2336 * sector);
+    f_iso->seek(2352 * sector);
 }
 
 long read_sector(Handle * f_iso, Byte * buffer, int type, int number) {