1 files changed, 87 insertions, 0 deletions
diff --git a/libhb/bits.h b/libhb/bits.h
new file mode 100644
index 000000000..6338edcf3
--- /dev/null
+++ b/libhb/bits.h
@@ -0,0 +1,87 @@
+/* $Id$
+
+   This file is part of the HandBrake source code.
+   Homepage: <http://handbrake.fr/>.
+   It may be used under the terms of the GNU General Public License. */
+
+#ifndef HB_BITS_H
+#define HB_BITS_H
+
+static inline int
+allbits_set(uint32_t *bitmap, int num_words)
+{
+    unsigned int i;
+    for( i = 0; i < num_words; i++ )
+    {
+        if( bitmap[i] != 0xFFFFFFFF )
+            return (0);
+    }
+    return (1);
+}
+
+static inline int
+bit_is_set( uint32_t *bit_map, int bit_pos )
+{
+    return( ( bit_map[bit_pos >> 5] & (0x1 << (bit_pos & 0x1F) ) ) != 0 );
+}
+
+static inline int
+bit_is_clear( uint32_t *bit_map, int bit_pos )
+{
+    return( ( bit_map[bit_pos >> 5] & ( 0x1 << (bit_pos & 0x1F) )  ) == 0 );
+}
+
+static inline void
+bit_set( uint32_t *bit_map, int bit_pos )
+{
+    bit_map[bit_pos >> 5] |= 0x1 << (bit_pos & 0x1F);
+}
+
+static inline void
+bit_clear(uint32_t *bit_map, int bit_pos)
+{
+    bit_map[bit_pos >> 5] &= ~( 0x1 << ( bit_pos & 0x1F ) );
+}
+
+static inline void
+bit_nclear(uint32_t *bit_map, int start_pos, int stop_pos)
+{
+    int start_word = start_pos >> 5;
+    int stop_word  = stop_pos >> 5;
+
+    if ( start_word == stop_word )
+    {
+
+        bit_map[start_word] &= ( ( 0x7FFFFFFF >> ( 31 - (start_pos & 0x1F ) ) )
+                             |  ( 0xFFFFFFFE << ( stop_pos & 0x1F ) ) );
+    }
+    else
+    {
+        bit_map[start_word] &= ( 0x7FFFFFFF >> ( 31 - ( start_pos & 0x1F ) ) );
+        while (++start_word < stop_word)
+            bit_map[start_word] = 0;
+        bit_map[stop_word]  &= 0xFFFFFFFE << ( stop_pos & 0x1F );
+    }
+}
+
+static inline void
+bit_nset(uint32_t *bit_map, int start_pos, int stop_pos)
+{
+    int start_word = start_pos >> 5;
+    int stop_word  = stop_pos >> 5;
+
+    if ( start_word == stop_word )
+    {
+        bit_map[start_word] |= ( ( 0xFFFFFFFF << ( start_pos & 0x1F ) )
+                             &  ( 0xFFFFFFFF >> ( 31 - ( stop_pos & 0x1F ) ) ) );
+    }
+    else
+    {
+        bit_map[start_word] |= 0xFFFFFFFF << ( start_pos & 0x1F );
+        while (++start_word < stop_word)
+            bit_map[start_word] = 0xFFFFFFFF;
+        bit_map[stop_word]  |= 0xFFFFFFFF >> ( 31 - ( stop_pos & 0x1F ) );
+    }
+}
+
+#endif /* HB_BITS_H */