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| author | marha <marha@users.sourceforge.net> | 2010-11-14 21:29:32 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2010-11-14 21:29:32 +0000 |
| commit | 3425b16d521b8846b95df2b7d32a548d93341f3b (patch) | |
| tree | fa430e95285d90f990b2d5574dad1e409ba5980c /xorg-server/dix/inpututils.c | |
| parent | 41c64098a90b4e974d5005a1619472f2e8a64ea1 (diff) | |
| download | vcxsrv-3425b16d521b8846b95df2b7d32a548d93341f3b.tar.gz vcxsrv-3425b16d521b8846b95df2b7d32a548d93341f3b.tar.bz2 vcxsrv-3425b16d521b8846b95df2b7d32a548d93341f3b.zip | |
xserver pixman libX11 libXext 14/11/2010
Diffstat (limited to 'xorg-server/dix/inpututils.c')
| -rw-r--r-- | xorg-server/dix/inpututils.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/xorg-server/dix/inpututils.c b/xorg-server/dix/inpututils.c index 39e65064a..80275bd40 100644 --- a/xorg-server/dix/inpututils.c +++ b/xorg-server/dix/inpututils.c @@ -35,6 +35,7 @@ #include "xace.h"
#include "xkbsrv.h"
#include "xkbstr.h"
+#include "inpututils.h"
/* Check if a button map change is okay with the device.
* Returns -1 for BadValue, as it collides with MappingBusy. */
@@ -418,3 +419,132 @@ FreeInputAttributes(InputAttributes *attrs) free(attrs);
}
+/**
+ * Alloc a valuator mask large enough for num_valuators.
+ */
+ValuatorMask*
+valuator_mask_new(int num_valuators)
+{
+ /* alloc a fixed size mask for now and ignore num_valuators. in the
+ * flying-car future, when we can dynamically alloc the masks and are
+ * not constrained by signals, we can start using num_valuators */
+ ValuatorMask *mask = calloc(1, sizeof(ValuatorMask));
+ mask->last_bit = -1;
+ return mask;
+}
+
+/**
+ * Sets a range of valuators between first_valuator and num_valuators with
+ * the data in the valuators array. All other values are set to 0.
+ */
+void
+valuator_mask_set_range(ValuatorMask *mask, int first_valuator, int num_valuators,
+ const int* valuators)
+{
+ int i;
+
+ valuator_mask_zero(mask);
+
+ for (i = first_valuator; i < min(first_valuator + num_valuators, MAX_VALUATORS); i++)
+ valuator_mask_set(mask, i, valuators[i - first_valuator]);
+}
+
+/**
+ * Reset mask to zero.
+ */
+void
+valuator_mask_zero(ValuatorMask *mask)
+{
+ memset(mask, 0, sizeof(*mask));
+ mask->last_bit = -1;
+}
+
+/**
+ * Returns the current size of the mask (i.e. the highest number of
+ * valuators currently set + 1).
+ */
+int
+valuator_mask_size(const ValuatorMask *mask)
+{
+ return mask->last_bit + 1;
+}
+
+/**
+ * Returns the number of valuators set in the given mask.
+ */
+int
+valuator_mask_num_valuators(const ValuatorMask *mask)
+{
+ return CountBits(mask->mask, min(mask->last_bit + 1, MAX_VALUATORS));
+}
+
+/**
+ * Return true if the valuator is set in the mask, or false otherwise.
+ */
+int
+valuator_mask_isset(const ValuatorMask *mask, int valuator)
+{
+ return mask->last_bit >= valuator && BitIsOn(mask->mask, valuator);
+}
+
+/**
+ * Set the valuator to the given data.
+ */
+void
+valuator_mask_set(ValuatorMask *mask, int valuator, int data)
+{
+ mask->last_bit = max(valuator, mask->last_bit);
+ SetBit(mask->mask, valuator);
+ mask->valuators[valuator] = data;
+}
+
+/**
+ * Return the requested valuator value. If the mask bit is not set for the
+ * given valuator, the returned value is undefined.
+ */
+int
+valuator_mask_get(const ValuatorMask *mask, int valuator)
+{
+ return mask->valuators[valuator];
+}
+
+/**
+ * Remove the valuator from the mask.
+ */
+void
+valuator_mask_unset(ValuatorMask *mask, int valuator)
+{
+ if (mask->last_bit >= valuator) {
+ int i, lastbit = -1;
+
+ ClearBit(mask->mask, valuator);
+ mask->valuators[valuator] = 0;
+
+ for (i = 0; i <= mask->last_bit; i++)
+ if (valuator_mask_isset(mask, i))
+ lastbit = max(lastbit, i);
+ mask->last_bit = lastbit;
+ }
+}
+
+void
+valuator_mask_copy(ValuatorMask *dest, const ValuatorMask *src)
+{
+ if (src)
+ memcpy(dest, src, sizeof(*dest));
+ else
+ valuator_mask_zero(dest);
+}
+
+int
+CountBits(const uint8_t *mask, int len)
+{
+ int i;
+ int ret = 0;
+
+ for (i = 0; i < len; i++)
+ if (BitIsOn(mask, i))
+ ret++;
+
+ return ret;
+}
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