Add libxkbcommon to 3rd party libs

This library is required by the XCB platform plugin. As we depend on
very recent version of this library and it might not be available
in base repositories of distributions, users can use -qt-xkbcommom
switch to build Qt with the bundled version.

Change-Id: I0ed2a5cc2f1df98b0e7cc926cabfa69818674e08
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>

1 files changed, 248 insertions, 0 deletions

diff --git a/src/3rdparty/xkbcommon/src/atom.c b/src/3rdparty/xkbcommon/src/atom.c
new file mode 100644
index 0000000000..a77502336e
--- /dev/null
+++ b/src/3rdparty/xkbcommon/src/atom.c
@@ -0,0 +1,248 @@
+/***********************************************************
+ * Copyright 1987, 1998  The Open Group
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation.
+ *
+ * The above copyright notice and this permission notice 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
+ * OPEN GROUP 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.
+ *
+ * Except as contained in this notice, the name of The Open Group shall not be
+ * used in advertising or otherwise to promote the sale, use or other dealings
+ * in this Software without prior written authorization from The Open Group.
+ *
+ *
+ * Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+ *
+ *                      All Rights Reserved
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of Digital not be
+ * used in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ *
+ * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+ * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ *
+ ******************************************************************/
+
+/************************************************************
+ * Copyright 1994 by Silicon Graphics Computer Systems, Inc.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of Silicon Graphics not be
+ * used in advertising or publicity pertaining to distribution
+ * of the software without specific prior written permission.
+ * Silicon Graphics makes no representation about the suitability
+ * of this software for any purpose. It is provided "as is"
+ * without any express or implied warranty.
+ *
+ * SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
+ * GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
+ * THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ ********************************************************/
+
+#include "utils.h"
+#include "atom.h"
+
+struct atom_node {
+    struct atom_node *left, *right;
+    xkb_atom_t atom;
+    unsigned int fingerprint;
+    char *string;
+};
+
+struct atom_table {
+    struct atom_node *root;
+    darray(struct atom_node *) table;
+};
+
+struct atom_table *
+atom_table_new(void)
+{
+    struct atom_table *table;
+
+    table = calloc(1, sizeof(*table));
+    if (!table)
+        return NULL;
+
+    darray_init(table->table);
+    darray_growalloc(table->table, 100);
+    darray_append(table->table, NULL);
+
+    return table;
+}
+
+static void
+free_atom(struct atom_node *patom)
+{
+    if (!patom)
+        return;
+
+    free_atom(patom->left);
+    free_atom(patom->right);
+    free(patom->string);
+    free(patom);
+}
+
+void
+atom_table_free(struct atom_table *table)
+{
+    if (!table)
+        return;
+
+    free_atom(table->root);
+    darray_free(table->table);
+    free(table);
+}
+
+const char *
+atom_text(struct atom_table *table, xkb_atom_t atom)
+{
+    if (atom >= darray_size(table->table) ||
+        darray_item(table->table, atom) == NULL)
+        return NULL;
+
+    return darray_item(table->table, atom)->string;
+}
+
+char *
+atom_strdup(struct atom_table *table, xkb_atom_t atom)
+{
+    return strdup_safe(atom_text(table, atom));
+}
+
+static bool
+find_node_pointer(struct atom_table *table, const char *string,
+                  struct atom_node ***np_out, unsigned int *fingerprint_out)
+{
+    struct atom_node **np;
+    unsigned i;
+    int comp;
+    unsigned int fp = 0;
+    size_t len;
+    bool found = false;
+
+    len = strlen(string);
+    np = &table->root;
+    for (i = 0; i < (len + 1) / 2; i++) {
+        fp = fp * 27 + string[i];
+        fp = fp * 27 + string[len - 1 - i];
+    }
+
+    while (*np) {
+        if (fp < (*np)->fingerprint) {
+            np = &((*np)->left);
+        }
+        else if (fp > (*np)->fingerprint) {
+            np = &((*np)->right);
+        }
+        else {
+            /* now start testing the strings */
+            comp = strncmp(string, (*np)->string, len);
+            if (comp < 0 || (comp == 0 && len < strlen((*np)->string))) {
+                np = &((*np)->left);
+            }
+            else if (comp > 0) {
+                np = &((*np)->right);
+            }
+            else {
+                found = true;
+                break;
+            }
+        }
+    }
+
+    *fingerprint_out = fp;
+    *np_out = np;
+    return found;
+}
+
+xkb_atom_t
+atom_lookup(struct atom_table *table, const char *string)
+{
+    struct atom_node **np;
+    unsigned int fp;
+
+    if (!string)
+        return XKB_ATOM_NONE;
+
+    if (!find_node_pointer(table, string, &np, &fp))
+        return XKB_ATOM_NONE;
+
+    return (*np)->atom;
+}
+
+/*
+ * If steal is true, we do not strdup @string; therefore it must be
+ * dynamically allocated, not be free'd by the caller and not be used
+ * afterwards. Use to avoid some redundant allocations.
+ */
+xkb_atom_t
+atom_intern(struct atom_table *table, const char *string,
+            bool steal)
+{
+    struct atom_node **np;
+    struct atom_node *nd;
+    unsigned int fp;
+
+    if (!string)
+        return XKB_ATOM_NONE;
+
+    if (find_node_pointer(table, string, &np, &fp)) {
+        if (steal)
+            free(UNCONSTIFY(string));
+        return (*np)->atom;
+    }
+
+    nd = malloc(sizeof(*nd));
+    if (!nd)
+        return XKB_ATOM_NONE;
+
+    if (steal) {
+        nd->string = UNCONSTIFY(string);
+    }
+    else {
+        nd->string = strdup(string);
+        if (!nd->string) {
+            free(nd);
+            return XKB_ATOM_NONE;
+        }
+    }
+
+    *np = nd;
+    nd->left = nd->right = NULL;
+    nd->fingerprint = fp;
+    nd->atom = darray_size(table->table);
+    darray_append(table->table, nd);
+
+    return nd->atom;
+}