fix calculation of size, when dealing with big file ranges

diff --git a/lib/dvb/dvb.cpp b/lib/dvb/dvb.cpp
index b887dc0dbfb3a820a7f70c0b0ee31f9424fe8e46..ba76a40d3555f7af697822178ab34f1e437bf5ba 100644 (file)
--- a/lib/dvb/dvb.cpp
+++ b/lib/dvb/dvb.cpp
@@ -836,10 +836,12 @@ void eDVBChannel::getNextSourceSpan(off_t current_offset, size_t bytes_read, off
                if ((current_offset >= i->first) && (current_offset < i->second))
                {
                        start = current_offset;
-                       size = i->second - current_offset;
-                       if (size > max)
+                               /* max can not exceed max(size_t). i->second - current_offset, however, can. */
+                       if ((i->second - current_offset) > max)
                                size = max;
-                       eDebug("HIT, %lld < %lld < %lld", i->first, current_offset, i->second);
+                       else
+                               size = i->second - current_offset;
+                       eDebug("HIT, %lld < %lld < %lld, size: %d", i->first, current_offset, i->second, size);
                        return;
                }
                if (current_offset < i->first)
@@ -849,9 +851,13 @@ void eDVBChannel::getNextSourceSpan(off_t current_offset, size_t bytes_read, off
                        {
                                        /* in normal playback, just start at the next zone. */
                                start = i->first;
-                               size = i->second - i->first;
-                               if (size > max)
+                               
+                                       /* size is not 64bit! */
+                               if ((i->second - i->first) > max)
                                        size = max;
+                               else
+                                       size = i->second - i->first;
+
                                eDebug("skip");
                                if (m_skipmode_m < 0)
                                {
@@ -865,12 +871,15 @@ void eDVBChannel::getNextSourceSpan(off_t current_offset, size_t bytes_read, off
                                        /* when skipping reverse, however, choose the zone before. */
                                --i;
                                eDebug("skip to previous block, which is %llx..%llx", i->first, i->second);
-                               size_t len = i->second - i->first;
-                               if (max > len)
-                                       max = len;
-                               start = i->second - max;
-                               size = max;
-                               eDebug("skipping to %llx, %d", start, size);
+                               size_t len;
+                               
+                               if ((i->second - i->first) > max)
+                                       len = max;
+                               else
+                                       len = i->second - i->first;
+
+                               start = i->second - len;
+                               eDebug("skipping to %llx, %d", start, len);
                        }
                        return;
                }