Signed-off-by: Peter Hutterer <peter.hutte...@who-t.net>
---
Changes since v1:
- update for new libwacom_get_matches() API
- moved the misplaced hunk for compare_matches to this patch
libwacom/libwacom.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++
libwacom/libwacom.h | 16 ++++++++++++
2 files changed, 88 insertions(+)
diff --git a/libwacom/libwacom.c b/libwacom/libwacom.c
index 8fe2b59..f32ca16 100644
--- a/libwacom/libwacom.c
+++ b/libwacom/libwacom.c
@@ -227,6 +227,78 @@ libwacom_copy(const WacomDevice *device)
return d;
}
+
+static int
+compare_matches(WacomDevice *a, WacomDevice *b)
+{
+ const WacomMatch **ma, **mb, **match_a, **match_b;
+
+ ma = libwacom_get_matches(a);
+ mb = libwacom_get_matches(b);
+
+ for (match_a = ma; *match_a; match_a++) {
+ int found = 0;
+ for (match_b = mb; !found && *mb; mb++) {
+ if (strcmp((*match_a)->match, (*match_b)->match) == 0)
+ found = 1;
+ }
+ if (!found)
+ return 1;
+ }
+
+ return 0;
+}
+
+int
+libwacom_compare(WacomDevice *a, WacomDevice *b, WacomCompareFlags flags)
+{
+ if ((a && !b) || (b && !a))
+ return 1;
+
+ if (strcmp(a->name, b->name) != 0)
+ return 1;
+
+ if (a->width != b->width || a->height != b->height)
+ return 1;
+
+ if (a->cls != b->cls)
+ return 1;
+
+ if (a->num_strips != b->num_strips)
+ return 1;
+
+ if (a->features != b->features)
+ return 1;
+
+ if (a->strips_num_modes != b->strips_num_modes)
+ return 1;
+
+ if (a->ring_num_modes != b->ring_num_modes)
+ return 1;
+
+ if (a->ring2_num_modes != b->ring2_num_modes)
+ return 1;
+
+ if (a->num_buttons != b->num_buttons)
+ return 1;
+
+ if (a->num_styli != b->num_styli)
+ return 1;
+
+ if (memcmp(a->supported_styli, b->supported_styli, sizeof(int) *
a->num_styli) != 0)
+ return 1;
+
+ if (memcmp(a->buttons, b->buttons, sizeof(WacomButtonFlags) *
a->num_buttons) != 0)
+ return 1;
+
+ if ((flags & WCOMPARE_MATCHES) && compare_matches(a, b) != 0)
+ return 1;
+ else if (strcmp(a->matches[a->match]->match,
b->matches[b->match]->match) != 0)
+ return 1;
+
+ return 0;
+}
+
static const WacomDevice *
libwacom_new (WacomDeviceDatabase *db, int vendor_id, int product_id,
WacomBusType bus, WacomError *error)
{
diff --git a/libwacom/libwacom.h b/libwacom/libwacom.h
index 4bd7940..f1402ce 100644
--- a/libwacom/libwacom.h
+++ b/libwacom/libwacom.h
@@ -167,6 +167,11 @@ typedef enum {
WFALLBACK_GENERIC = 1
} WacomFallbackFlags;
+typedef enum {
+ WCOMPARE_NORMAL = 0, /**< compare the device only */
+ WCOMPARE_MATCHES = (1 << 1), /**< compare all possible
matches too */
+} WacomCompareFlags;
+
/**
* Allocate a new structure for error reporting.
*
@@ -290,6 +295,17 @@ void libwacom_print_device_description (int fd,
WacomDevice *device);
void libwacom_destroy(WacomDevice *device);
/**
+ * Compare the two devices for equal-ness.
+ *
+ * @param a The first device
+ * @param b The second device
+ * @param flags Flags to dictate what constitutes a match
+ *
+ * @return 0 if the devices are identical, nonzero otherwise
+ */
+int libwacom_compare(WacomDevice *a, WacomDevice *b, WacomCompareFlags flags);
+
+/**
* @param device The tablet to query
* @return The class of the device
*/
--
1.7.10
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