1 files changed, 12 insertions, 11 deletions
diff --git a/decoder.cc b/decoder.cc
index c0defc8..75d70d0 100644
--- a/decoder.cc
+++ b/decoder.cc
@@ -54,19 +54,20 @@ void Pretty_print::operator()( const char * const msg, FILE * const f ) const
 /* Returns the number of bytes really read.
    If (returned value < size) and (errno == 0), means EOF was reached.
 */
-int readblock( const int fd, uint8_t * const buf, const int size )
+long readblock( const int fd, uint8_t * const buf, const long size )
   {
-  int rest = size;
+  long pos = 0;
   errno = 0;
-  while( rest > 0 )
+  while( pos < size )
     {
-    const int n = read( fd, buf + size - rest, rest );
-    if( n > 0 ) rest -= n;
+    const int sz = std::min( 65536L, size - pos );
+    const int n = read( fd, buf + pos, sz );
+    if( n > 0 ) pos += n;
     else if( n == 0 ) break;				// EOF
     else if( errno != EINTR ) break;
     errno = 0;
     }
-  return size - rest;
+  return pos;
   }
 
 
@@ -75,16 +76,16 @@ int readblock( const int fd, uint8_t * const buf, const int size )
 */
 int writeblock( const int fd, const uint8_t * const buf, const int size )
   {
-  int rest = size;
+  int pos = 0;
   errno = 0;
-  while( rest > 0 )
+  while( pos < size )
     {
-    const int n = write( fd, buf + size - rest, rest );
-    if( n > 0 ) rest -= n;
+    const int n = write( fd, buf + pos, size - pos );
+    if( n > 0 ) pos += n;
     else if( n < 0 && errno != EINTR ) break;
     errno = 0;
     }
-  return size - rest;
+  return pos;
   }