Add a new XI2Mask struct and a few helper functions.

The current XI2 mask handling is handy for copying (fixed size arrays) but a
pain to deal with otherwise. Add a struct for XI2 masks and the required
accessors.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>

test/xi2/Makefile.am

@@ -10,7 +10,8 @@ noinst_PROGRAMS =  \
         protocol-xipassivegrabdevice \
         protocol-xiquerypointer \
         protocol-xiwarppointer \
-        protocol-eventconvert
+        protocol-eventconvert \
+        xi2
 
 TESTS=$(noinst_PROGRAMS)
 TESTS_ENVIRONMENT = $(XORG_MALLOC_DEBUG_ENV)
@@ -34,6 +35,7 @@ protocol_xiquerypointer_LDADD=$(TEST_LDADD)
 protocol_xipassivegrabdevice_LDADD=$(TEST_LDADD)
 protocol_xiwarppointer_LDADD=$(TEST_LDADD)
 protocol_eventconvert_LDADD=$(TEST_LDADD)
+xi2_LDADD=$(TEST_LDADD)
 
 protocol_xiqueryversion_LDFLAGS=$(AM_LDFLAGS) -Wl,-wrap,WriteToClient
 protocol_xiquerydevice_LDFLAGS=$(AM_LDFLAGS) -Wl,-wrap,WriteToClient
@@ -44,6 +46,7 @@ protocol_xigetclientpointer_LDFLAGS=$(AM_LDFLAGS) -Wl,-wrap,WriteToClient -Wl,-w
 protocol_xipassivegrabdevice_LDFLAGS=$(AM_LDFLAGS) -Wl,-wrap,GrabButton -Wl,-wrap,dixLookupWindow -Wl,-wrap,WriteToClient
 protocol_xiquerypointer_LDFLAGS=$(AM_LDFLAGS) -Wl,-wrap,WriteToClient -Wl,-wrap,dixLookupWindow
 protocol_xiwarppointer_LDFLAGS=$(AM_LDFLAGS) -Wl,-wrap,WriteToClient -Wl,-wrap,dixLookupWindow
+xi2_LDFLAGS=$(AM_LDFLAGS)
 
 protocol_xiqueryversion_SOURCES=$(COMMON_SOURCES) protocol-xiqueryversion.c
 protocol_xiquerydevice_SOURCES=$(COMMON_SOURCES) protocol-xiquerydevice.c

test/xi2/xi2.c

@@ -0,0 +1,129 @@
+/**
+ * Copyright © 2011 Red Hat, Inc.
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a
+ *  copy of this software and associated documentation files (the "Software"),
+ *  to deal in the Software without restriction, including without limitation
+ *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ *  and/or sell copies of the Software, and to permit persons to whom the
+ *  Software is furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice (including the next
+ *  paragraph) shall be included in all copies or substantial portions of the
+ *  Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ *  DEALINGS IN THE SOFTWARE.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <stdint.h>
+#include "inpututils.h"
+#include "inputstr.h"
+#include "assert.h"
+
+static void xi2mask_test(void)
+{
+    XI2Mask *xi2mask = NULL,
+            *mergemask = NULL;
+    unsigned char *mask;
+    DeviceIntRec dev;
+    int i;
+
+    /* size >= nmasks * 2 for the test cases below */
+    xi2mask = xi2mask_new_with_size(MAXDEVICES + 2, (MAXDEVICES + 2) * 2);
+    assert(xi2mask);
+    assert(xi2mask->nmasks > 0);
+    assert(xi2mask->mask_size > 0);
+
+    assert(xi2mask_mask_size(xi2mask) == xi2mask->mask_size);
+    assert(xi2mask_num_masks(xi2mask) == xi2mask->nmasks);
+
+    mask = calloc(1, xi2mask_mask_size(xi2mask));
+    /* ensure zeros */
+    for (i = 0; i < xi2mask_num_masks(xi2mask); i++) {
+        const unsigned char *m = xi2mask_get_one_mask(xi2mask, i);
+        assert(memcmp(mask, m, xi2mask_mask_size(xi2mask)) == 0);
+    }
+
+    /* set various bits */
+    for (i = 0; i < xi2mask_num_masks(xi2mask); i++) {
+        const unsigned char *m;
+        xi2mask_set(xi2mask, i, i);
+
+        dev.id = i;
+        assert(xi2mask_isset(xi2mask, &dev, i));
+
+        m = xi2mask_get_one_mask(xi2mask, i);
+        SetBit(mask, i);
+        assert(memcmp(mask, m, xi2mask_mask_size(xi2mask)) == 0);
+        ClearBit(mask, i);
+    }
+
+    /* ensure zeros one-by-one */
+    for (i = 0; i < xi2mask_num_masks(xi2mask); i++) {
+        const unsigned char *m = xi2mask_get_one_mask(xi2mask, i);
+        assert(memcmp(mask, m, xi2mask_mask_size(xi2mask)) != 0);
+        xi2mask_zero(xi2mask, i);
+        assert(memcmp(mask, m, xi2mask_mask_size(xi2mask)) == 0);
+    }
+
+    /* re-set, zero all */
+    for (i = 0; i < xi2mask_num_masks(xi2mask); i++)
+        xi2mask_set(xi2mask, i, i);
+    xi2mask_zero(xi2mask, -1);
+
+    for (i = 0; i < xi2mask_num_masks(xi2mask); i++) {
+        const unsigned char *m = xi2mask_get_one_mask(xi2mask, i);
+        assert(memcmp(mask, m, xi2mask_mask_size(xi2mask)) == 0);
+    }
+
+    for (i = 0; i < xi2mask_num_masks(xi2mask); i++) {
+        const unsigned char *m;
+        SetBit(mask, i);
+        xi2mask_set_one_mask(xi2mask, i, mask, xi2mask_mask_size(xi2mask));
+        m = xi2mask_get_one_mask(xi2mask, i);
+        assert(memcmp(mask, m, xi2mask_mask_size(xi2mask)) == 0);
+        ClearBit(mask, i);
+    }
+
+    mergemask = xi2mask_new_with_size(MAXDEVICES + 2, (MAXDEVICES + 2) * 2);
+    for (i = 0; i < xi2mask_num_masks(mergemask); i++) {
+        dev.id = i;
+        xi2mask_set(mergemask, i, i * 2);
+    }
+
+    /* xi2mask still has all i bits set, should now also have all i * 2 bits */
+    xi2mask_merge(xi2mask, mergemask);
+    for (i = 0; i < xi2mask_num_masks(mergemask); i++) {
+        const unsigned char *m = xi2mask_get_one_mask(xi2mask, i);
+        SetBit(mask, i);
+        SetBit(mask, i * 2);
+        assert(memcmp(mask, m, xi2mask_mask_size(xi2mask)) == 0);
+        ClearBit(mask, i);
+        ClearBit(mask, i * 2);
+    }
+
+    xi2mask_free(&xi2mask);
+    assert(xi2mask == NULL);
+
+    xi2mask_free(&mergemask);
+    assert(mergemask == NULL);
+    free(mask);
+}
+
+
+int main(int argc, char** argv)
+{
+    xi2mask_test();
+
+    return 0;
+}