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bitmask: Don't allocate memory for small bitmasks

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Code taken more or less verbatim from CoglBitmask.
This commit is contained in:
Neil Roberts
2012-02-09 04:53:43 +01:00
committed by Benjamin Otte
parent 27eb83a410
commit 6044dfc35b
3 changed files with 132 additions and 37 deletions
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14
gtk/gtkallocatedbitmaskprivate.h
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@ -27,12 +27,21 @@ G_BEGIN_DECLS
typedef struct _GtkBitmask GtkBitmask;
#define _gtk_bitmask_to_bits(mask) \
(GPOINTER_TO_SIZE (mask) >> ((gsize) 1))
#define _gtk_bitmask_from_bits(bits) \
GSIZE_TO_POINTER ((((gsize) (bits)) << 1) | 1)
#define _gtk_bitmask_is_allocated(mask) \
(!(GPOINTER_TO_SIZE (mask) & 1))
#define GTK_BITMASK_N_DIRECT_BITS (sizeof (gsize) * 8 - 1)
GtkBitmask * _gtk_allocated_bitmask_new (void);
GtkBitmask * _gtk_allocated_bitmask_copy (const GtkBitmask *mask);
void _gtk_allocated_bitmask_free (GtkBitmask *mask);
char * _gtk_allocated_bitmask_to_string (const GtkBitmask *mask);
void _gtk_allocated_bitmask_print (const GtkBitmask *mask,
GString *string);
@ -53,7 +62,6 @@ GtkBitmask * _gtk_allocated_bitmask_invert_range (GtkBitmask *mask
guint start,
guint end) G_GNUC_WARN_UNUSED_RESULT;
gboolean _gtk_allocated_bitmask_is_empty (const GtkBitmask *mask);
gboolean _gtk_allocated_bitmask_equals (const GtkBitmask *mask,
const GtkBitmask *other);
gboolean _gtk_allocated_bitmask_intersects (const GtkBitmask *mask,