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, 720 insertions, 0 deletions

diff --git a/src/3rdparty/xkbcommon/src/keysym.c b/src/3rdparty/xkbcommon/src/keysym.c
new file mode 100644
index 0000000000..1e92a4ac9f
--- /dev/null
+++ b/src/3rdparty/xkbcommon/src/keysym.c
@@ -0,0 +1,720 @@
+/*
+ * Copyright 1985, 1987, 1990, 1998  The Open Group
+ *
+ * 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 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 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 names of the authors or their
+ * institutions 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 authors.
+ */
+
+/*
+ * Copyright © 2009 Dan Nicholson
+ *
+ * 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.
+ */
+
+#include <stdlib.h>
+#include "xkbcommon/xkbcommon.h"
+#include "utils.h"
+#include "keysym.h"
+#include "ks_tables.h"
+
+static int
+compare_by_keysym(const void *a, const void *b)
+{
+    const struct name_keysym *key = a, *entry = b;
+    return key->keysym - (int32_t)entry->keysym;
+}
+
+static int
+compare_by_name(const void *a, const void *b)
+{
+    const struct name_keysym *key = a, *entry = b;
+    return strcasecmp(key->name, entry->name);
+}
+
+XKB_EXPORT int
+xkb_keysym_get_name(xkb_keysym_t ks, char *buffer, size_t size)
+{
+    const struct name_keysym search = { .name = NULL, .keysym = ks };
+    const struct name_keysym *entry;
+
+    if ((ks & ((unsigned long) ~0x1fffffff)) != 0) {
+        snprintf(buffer, size, "Invalid");
+        return -1;
+    }
+
+    entry = bsearch(&search, keysym_to_name,
+                    ARRAY_SIZE(keysym_to_name),
+                    sizeof(*keysym_to_name),
+                    compare_by_keysym);
+    if (entry)
+        return snprintf(buffer, size, "%s", entry->name);
+
+    /* Unnamed Unicode codepoint. */
+    if (ks >= 0x01000100 && ks <= 0x0110ffff) {
+        const int width = (ks & 0xff0000UL) ? 8 : 4;
+        return snprintf(buffer, size, "U%0*lX", width, ks & 0xffffffUL);
+    }
+
+    /* Unnamed, non-Unicode, symbol (shouldn't generally happen). */
+    return snprintf(buffer, size, "0x%08x", ks);
+}
+
+/*
+ * Find the correct keysym if one case-insensitive match is given.
+ *
+ * The name_to_keysym table is sorted by strcasecmp(). So bsearch() may return
+ * _any_ of all possible case-insensitive duplicates. This function searches the
+ * returned entry @entry, all previous and all next entries that match by
+ * case-insensitive comparison and returns the exact match to @name. If @icase
+ * is true, then this returns the best case-insensitive match instead of a
+ * correct match.
+ * The "best" case-insensitive match is the lower-case keysym which we find with
+ * the help of xkb_keysym_is_lower().
+ * The only keysyms that only differ by letter-case are keysyms that are
+ * available as lower-case and upper-case variant (like KEY_a and KEY_A). So
+ * returning the first lower-case match is enough in this case.
+ */
+static const struct name_keysym *
+find_sym(const struct name_keysym *entry, const char *name, bool icase)
+{
+    const struct name_keysym *iter, *last;
+    size_t len = ARRAY_SIZE(name_to_keysym);
+
+    if (!entry)
+        return NULL;
+
+    if (!icase && strcmp(entry->name, name) == 0)
+        return entry;
+    if (icase && xkb_keysym_is_lower(entry->keysym))
+        return entry;
+
+    for (iter = entry - 1; iter >= name_to_keysym; --iter) {
+        if (!icase && strcmp(iter->name, name) == 0)
+            return iter;
+        if (strcasecmp(iter->name, entry->name) != 0)
+            break;
+        if (icase && xkb_keysym_is_lower(iter->keysym))
+            return iter;
+    }
+
+    last = name_to_keysym + len;
+    for (iter = entry + 1; iter < last; --iter) {
+        if (!icase && strcmp(iter->name, name) == 0)
+            return iter;
+        if (strcasecmp(iter->name, entry->name) != 0)
+            break;
+        if (icase && xkb_keysym_is_lower(iter->keysym))
+            return iter;
+    }
+
+    if (icase)
+        return entry;
+    return NULL;
+}
+
+XKB_EXPORT xkb_keysym_t
+xkb_keysym_from_name(const char *s, enum xkb_keysym_flags flags)
+{
+    const struct name_keysym search = { .name = s, .keysym = 0 };
+    const struct name_keysym *entry;
+    char *tmp;
+    xkb_keysym_t val;
+    bool icase = !!(flags & XKB_KEYSYM_CASE_INSENSITIVE);
+
+    if (flags & ~XKB_KEYSYM_CASE_INSENSITIVE)
+        return XKB_KEY_NoSymbol;
+
+    entry = bsearch(&search, name_to_keysym,
+                    ARRAY_SIZE(name_to_keysym),
+                    sizeof(*name_to_keysym),
+                    compare_by_name);
+    entry = find_sym(entry, s, icase);
+    if (entry)
+        return entry->keysym;
+
+    if (*s == 'U' || (icase && *s == 'u')) {
+        val = strtoul(&s[1], &tmp, 16);
+        if (tmp && *tmp != '\0')
+            return XKB_KEY_NoSymbol;
+
+        if (val < 0x20 || (val > 0x7e && val < 0xa0))
+            return XKB_KEY_NoSymbol;
+        if (val < 0x100)
+            return val;
+        if (val > 0x10ffff)
+            return XKB_KEY_NoSymbol;
+        return val | 0x01000000;
+    }
+    else if (s[0] == '0' && (s[1] == 'x' || (icase && s[1] == 'X'))) {
+        val = strtoul(&s[2], &tmp, 16);
+        if (tmp && *tmp != '\0')
+            return XKB_KEY_NoSymbol;
+
+        return val;
+    }
+
+    /* Stupid inconsistency between the headers and XKeysymDB: the former has
+     * no separating underscore, while some XF86* syms in the latter did.
+     * As a last ditch effort, try without. */
+    if (strncmp(s, "XF86_", 5) == 0 ||
+        (icase && strncasecmp(s, "XF86_", 5) == 0)) {
+        xkb_keysym_t ret;
+        tmp = strdup(s);
+        if (!tmp)
+            return XKB_KEY_NoSymbol;
+        memmove(&tmp[4], &tmp[5], strlen(s) - 5 + 1);
+        ret = xkb_keysym_from_name(tmp, flags);
+        free(tmp);
+        return ret;
+    }
+
+    return XKB_KEY_NoSymbol;
+}
+
+bool
+xkb_keysym_is_keypad(xkb_keysym_t keysym)
+{
+    return keysym >= XKB_KEY_KP_Space && keysym <= XKB_KEY_KP_Equal;
+}
+
+static void
+XConvertCase(xkb_keysym_t sym, xkb_keysym_t *lower, xkb_keysym_t *upper);
+
+bool
+xkb_keysym_is_lower(xkb_keysym_t ks)
+{
+    xkb_keysym_t lower, upper;
+
+    XConvertCase(ks, &lower, &upper);
+
+    if (lower == upper)
+        return false;
+
+    return (ks == lower ? true : false);
+}
+
+bool
+xkb_keysym_is_upper(xkb_keysym_t ks)
+{
+    xkb_keysym_t lower, upper;
+
+    XConvertCase(ks, &lower, &upper);
+
+    if (lower == upper)
+        return false;
+
+    return (ks == upper ? true : false);
+}
+
+/*
+ * The following is copied verbatim from libX11:src/KeyBind.c, commit
+ * d45b3fc19fbe95c41afc4e51d768df6d42332010, with the following changes:
+ *  - unsigned -> uint32_t
+ *  - unsigend short -> uint16_t
+ *  - s/XK_/XKB_KEY_
+ *
+ * XXX: If newlocale() and iswlower_l()/iswupper_l() interface ever
+ *      become portable, we should use that in conjunction with
+ *      xkb_keysym_to_utf32(), instead of all this stuff.  We should
+ *      be sure to give the same results as libX11, though, and be
+ *      locale independent; this information is used by xkbcomp to
+ *      find the automatic type to assign to key groups.
+ */
+
+static void
+UCSConvertCase(uint32_t code, xkb_keysym_t *lower, xkb_keysym_t *upper)
+{
+    /* Case conversion for UCS, as in Unicode Data version 4.0.0 */
+    /* NB: Only converts simple one-to-one mappings. */
+
+    /* Tables are used where they take less space than     */
+    /* the code to work out the mappings. Zero values mean */
+    /* undefined code points.                              */
+
+    static uint16_t const IPAExt_upper_mapping[] = { /* part only */
+                            0x0181, 0x0186, 0x0255, 0x0189, 0x018A,
+    0x0258, 0x018F, 0x025A, 0x0190, 0x025C, 0x025D, 0x025E, 0x025F,
+    0x0193, 0x0261, 0x0262, 0x0194, 0x0264, 0x0265, 0x0266, 0x0267,
+    0x0197, 0x0196, 0x026A, 0x026B, 0x026C, 0x026D, 0x026E, 0x019C,
+    0x0270, 0x0271, 0x019D, 0x0273, 0x0274, 0x019F, 0x0276, 0x0277,
+    0x0278, 0x0279, 0x027A, 0x027B, 0x027C, 0x027D, 0x027E, 0x027F,
+    0x01A6, 0x0281, 0x0282, 0x01A9, 0x0284, 0x0285, 0x0286, 0x0287,
+    0x01AE, 0x0289, 0x01B1, 0x01B2, 0x028C, 0x028D, 0x028E, 0x028F,
+    0x0290, 0x0291, 0x01B7
+    };
+
+    static uint16_t const LatinExtB_upper_mapping[] = { /* first part only */
+    0x0180, 0x0181, 0x0182, 0x0182, 0x0184, 0x0184, 0x0186, 0x0187,
+    0x0187, 0x0189, 0x018A, 0x018B, 0x018B, 0x018D, 0x018E, 0x018F,
+    0x0190, 0x0191, 0x0191, 0x0193, 0x0194, 0x01F6, 0x0196, 0x0197,
+    0x0198, 0x0198, 0x019A, 0x019B, 0x019C, 0x019D, 0x0220, 0x019F,
+    0x01A0, 0x01A0, 0x01A2, 0x01A2, 0x01A4, 0x01A4, 0x01A6, 0x01A7,
+    0x01A7, 0x01A9, 0x01AA, 0x01AB, 0x01AC, 0x01AC, 0x01AE, 0x01AF,
+    0x01AF, 0x01B1, 0x01B2, 0x01B3, 0x01B3, 0x01B5, 0x01B5, 0x01B7,
+    0x01B8, 0x01B8, 0x01BA, 0x01BB, 0x01BC, 0x01BC, 0x01BE, 0x01F7,
+    0x01C0, 0x01C1, 0x01C2, 0x01C3, 0x01C4, 0x01C4, 0x01C4, 0x01C7,
+    0x01C7, 0x01C7, 0x01CA, 0x01CA, 0x01CA
+    };
+
+    static uint16_t const LatinExtB_lower_mapping[] = { /* first part only */
+    0x0180, 0x0253, 0x0183, 0x0183, 0x0185, 0x0185, 0x0254, 0x0188,
+    0x0188, 0x0256, 0x0257, 0x018C, 0x018C, 0x018D, 0x01DD, 0x0259,
+    0x025B, 0x0192, 0x0192, 0x0260, 0x0263, 0x0195, 0x0269, 0x0268,
+    0x0199, 0x0199, 0x019A, 0x019B, 0x026F, 0x0272, 0x019E, 0x0275,
+    0x01A1, 0x01A1, 0x01A3, 0x01A3, 0x01A5, 0x01A5, 0x0280, 0x01A8,
+    0x01A8, 0x0283, 0x01AA, 0x01AB, 0x01AD, 0x01AD, 0x0288, 0x01B0,
+    0x01B0, 0x028A, 0x028B, 0x01B4, 0x01B4, 0x01B6, 0x01B6, 0x0292,
+    0x01B9, 0x01B9, 0x01BA, 0x01BB, 0x01BD, 0x01BD, 0x01BE, 0x01BF,
+    0x01C0, 0x01C1, 0x01C2, 0x01C3, 0x01C6, 0x01C6, 0x01C6, 0x01C9,
+    0x01C9, 0x01C9, 0x01CC, 0x01CC, 0x01CC
+    };
+
+    static uint16_t const Greek_upper_mapping[] = {
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0374, 0x0375, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x037A, 0x0000, 0x0000, 0x0000, 0x037E, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0384, 0x0385, 0x0386, 0x0387,
+    0x0388, 0x0389, 0x038A, 0x0000, 0x038C, 0x0000, 0x038E, 0x038F,
+    0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397,
+    0x0398, 0x0399, 0x039A, 0x039B, 0x039C, 0x039D, 0x039E, 0x039F,
+    0x03A0, 0x03A1, 0x0000, 0x03A3, 0x03A4, 0x03A5, 0x03A6, 0x03A7,
+    0x03A8, 0x03A9, 0x03AA, 0x03AB, 0x0386, 0x0388, 0x0389, 0x038A,
+    0x03B0, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397,
+    0x0398, 0x0399, 0x039A, 0x039B, 0x039C, 0x039D, 0x039E, 0x039F,
+    0x03A0, 0x03A1, 0x03A3, 0x03A3, 0x03A4, 0x03A5, 0x03A6, 0x03A7,
+    0x03A8, 0x03A9, 0x03AA, 0x03AB, 0x038C, 0x038E, 0x038F, 0x0000,
+    0x0392, 0x0398, 0x03D2, 0x03D3, 0x03D4, 0x03A6, 0x03A0, 0x03D7,
+    0x03D8, 0x03D8, 0x03DA, 0x03DA, 0x03DC, 0x03DC, 0x03DE, 0x03DE,
+    0x03E0, 0x03E0, 0x03E2, 0x03E2, 0x03E4, 0x03E4, 0x03E6, 0x03E6,
+    0x03E8, 0x03E8, 0x03EA, 0x03EA, 0x03EC, 0x03EC, 0x03EE, 0x03EE,
+    0x039A, 0x03A1, 0x03F9, 0x03F3, 0x03F4, 0x0395, 0x03F6, 0x03F7,
+    0x03F7, 0x03F9, 0x03FA, 0x03FA, 0x0000, 0x0000, 0x0000, 0x0000
+    };
+
+    static uint16_t const Greek_lower_mapping[] = {
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0374, 0x0375, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x037A, 0x0000, 0x0000, 0x0000, 0x037E, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0384, 0x0385, 0x03AC, 0x0387,
+    0x03AD, 0x03AE, 0x03AF, 0x0000, 0x03CC, 0x0000, 0x03CD, 0x03CE,
+    0x0390, 0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, 0x03B6, 0x03B7,
+    0x03B8, 0x03B9, 0x03BA, 0x03BB, 0x03BC, 0x03BD, 0x03BE, 0x03BF,
+    0x03C0, 0x03C1, 0x0000, 0x03C3, 0x03C4, 0x03C5, 0x03C6, 0x03C7,
+    0x03C8, 0x03C9, 0x03CA, 0x03CB, 0x03AC, 0x03AD, 0x03AE, 0x03AF,
+    0x03B0, 0x03B1, 0x03B2, 0x03B3, 0x03B4, 0x03B5, 0x03B6, 0x03B7,
+    0x03B8, 0x03B9, 0x03BA, 0x03BB, 0x03BC, 0x03BD, 0x03BE, 0x03BF,
+    0x03C0, 0x03C1, 0x03C2, 0x03C3, 0x03C4, 0x03C5, 0x03C6, 0x03C7,
+    0x03C8, 0x03C9, 0x03CA, 0x03CB, 0x03CC, 0x03CD, 0x03CE, 0x0000,
+    0x03D0, 0x03D1, 0x03D2, 0x03D3, 0x03D4, 0x03D5, 0x03D6, 0x03D7,
+    0x03D9, 0x03D9, 0x03DB, 0x03DB, 0x03DD, 0x03DD, 0x03DF, 0x03DF,
+    0x03E1, 0x03E1, 0x03E3, 0x03E3, 0x03E5, 0x03E5, 0x03E7, 0x03E7,
+    0x03E9, 0x03E9, 0x03EB, 0x03EB, 0x03ED, 0x03ED, 0x03EF, 0x03EF,
+    0x03F0, 0x03F1, 0x03F2, 0x03F3, 0x03B8, 0x03F5, 0x03F6, 0x03F8,
+    0x03F8, 0x03F2, 0x03FB, 0x03FB, 0x0000, 0x0000, 0x0000, 0x0000
+    };
+
+    static uint16_t const GreekExt_lower_mapping[] = {
+    0x1F00, 0x1F01, 0x1F02, 0x1F03, 0x1F04, 0x1F05, 0x1F06, 0x1F07,
+    0x1F00, 0x1F01, 0x1F02, 0x1F03, 0x1F04, 0x1F05, 0x1F06, 0x1F07,
+    0x1F10, 0x1F11, 0x1F12, 0x1F13, 0x1F14, 0x1F15, 0x0000, 0x0000,
+    0x1F10, 0x1F11, 0x1F12, 0x1F13, 0x1F14, 0x1F15, 0x0000, 0x0000,
+    0x1F20, 0x1F21, 0x1F22, 0x1F23, 0x1F24, 0x1F25, 0x1F26, 0x1F27,
+    0x1F20, 0x1F21, 0x1F22, 0x1F23, 0x1F24, 0x1F25, 0x1F26, 0x1F27,
+    0x1F30, 0x1F31, 0x1F32, 0x1F33, 0x1F34, 0x1F35, 0x1F36, 0x1F37,
+    0x1F30, 0x1F31, 0x1F32, 0x1F33, 0x1F34, 0x1F35, 0x1F36, 0x1F37,
+    0x1F40, 0x1F41, 0x1F42, 0x1F43, 0x1F44, 0x1F45, 0x0000, 0x0000,
+    0x1F40, 0x1F41, 0x1F42, 0x1F43, 0x1F44, 0x1F45, 0x0000, 0x0000,
+    0x1F50, 0x1F51, 0x1F52, 0x1F53, 0x1F54, 0x1F55, 0x1F56, 0x1F57,
+    0x0000, 0x1F51, 0x0000, 0x1F53, 0x0000, 0x1F55, 0x0000, 0x1F57,
+    0x1F60, 0x1F61, 0x1F62, 0x1F63, 0x1F64, 0x1F65, 0x1F66, 0x1F67,
+    0x1F60, 0x1F61, 0x1F62, 0x1F63, 0x1F64, 0x1F65, 0x1F66, 0x1F67,
+    0x1F70, 0x1F71, 0x1F72, 0x1F73, 0x1F74, 0x1F75, 0x1F76, 0x1F77,
+    0x1F78, 0x1F79, 0x1F7A, 0x1F7B, 0x1F7C, 0x1F7D, 0x0000, 0x0000,
+    0x1F80, 0x1F81, 0x1F82, 0x1F83, 0x1F84, 0x1F85, 0x1F86, 0x1F87,
+    0x1F80, 0x1F81, 0x1F82, 0x1F83, 0x1F84, 0x1F85, 0x1F86, 0x1F87,
+    0x1F90, 0x1F91, 0x1F92, 0x1F93, 0x1F94, 0x1F95, 0x1F96, 0x1F97,
+    0x1F90, 0x1F91, 0x1F92, 0x1F93, 0x1F94, 0x1F95, 0x1F96, 0x1F97,
+    0x1FA0, 0x1FA1, 0x1FA2, 0x1FA3, 0x1FA4, 0x1FA5, 0x1FA6, 0x1FA7,
+    0x1FA0, 0x1FA1, 0x1FA2, 0x1FA3, 0x1FA4, 0x1FA5, 0x1FA6, 0x1FA7,
+    0x1FB0, 0x1FB1, 0x1FB2, 0x1FB3, 0x1FB4, 0x0000, 0x1FB6, 0x1FB7,
+    0x1FB0, 0x1FB1, 0x1F70, 0x1F71, 0x1FB3, 0x1FBD, 0x1FBE, 0x1FBF,
+    0x1FC0, 0x1FC1, 0x1FC2, 0x1FC3, 0x1FC4, 0x0000, 0x1FC6, 0x1FC7,
+    0x1F72, 0x1F73, 0x1F74, 0x1F75, 0x1FC3, 0x1FCD, 0x1FCE, 0x1FCF,
+    0x1FD0, 0x1FD1, 0x1FD2, 0x1FD3, 0x0000, 0x0000, 0x1FD6, 0x1FD7,
+    0x1FD0, 0x1FD1, 0x1F76, 0x1F77, 0x0000, 0x1FDD, 0x1FDE, 0x1FDF,
+    0x1FE0, 0x1FE1, 0x1FE2, 0x1FE3, 0x1FE4, 0x1FE5, 0x1FE6, 0x1FE7,
+    0x1FE0, 0x1FE1, 0x1F7A, 0x1F7B, 0x1FE5, 0x1FED, 0x1FEE, 0x1FEF,
+    0x0000, 0x0000, 0x1FF2, 0x1FF3, 0x1FF4, 0x0000, 0x1FF6, 0x1FF7,
+    0x1F78, 0x1F79, 0x1F7C, 0x1F7D, 0x1FF3, 0x1FFD, 0x1FFE, 0x0000
+    };
+
+    static uint16_t const GreekExt_upper_mapping[] = {
+    0x1F08, 0x1F09, 0x1F0A, 0x1F0B, 0x1F0C, 0x1F0D, 0x1F0E, 0x1F0F,
+    0x1F08, 0x1F09, 0x1F0A, 0x1F0B, 0x1F0C, 0x1F0D, 0x1F0E, 0x1F0F,
+    0x1F18, 0x1F19, 0x1F1A, 0x1F1B, 0x1F1C, 0x1F1D, 0x0000, 0x0000,
+    0x1F18, 0x1F19, 0x1F1A, 0x1F1B, 0x1F1C, 0x1F1D, 0x0000, 0x0000,
+    0x1F28, 0x1F29, 0x1F2A, 0x1F2B, 0x1F2C, 0x1F2D, 0x1F2E, 0x1F2F,
+    0x1F28, 0x1F29, 0x1F2A, 0x1F2B, 0x1F2C, 0x1F2D, 0x1F2E, 0x1F2F,
+    0x1F38, 0x1F39, 0x1F3A, 0x1F3B, 0x1F3C, 0x1F3D, 0x1F3E, 0x1F3F,
+    0x1F38, 0x1F39, 0x1F3A, 0x1F3B, 0x1F3C, 0x1F3D, 0x1F3E, 0x1F3F,
+    0x1F48, 0x1F49, 0x1F4A, 0x1F4B, 0x1F4C, 0x1F4D, 0x0000, 0x0000,
+    0x1F48, 0x1F49, 0x1F4A, 0x1F4B, 0x1F4C, 0x1F4D, 0x0000, 0x0000,
+    0x1F50, 0x1F59, 0x1F52, 0x1F5B, 0x1F54, 0x1F5D, 0x1F56, 0x1F5F,
+    0x0000, 0x1F59, 0x0000, 0x1F5B, 0x0000, 0x1F5D, 0x0000, 0x1F5F,
+    0x1F68, 0x1F69, 0x1F6A, 0x1F6B, 0x1F6C, 0x1F6D, 0x1F6E, 0x1F6F,
+    0x1F68, 0x1F69, 0x1F6A, 0x1F6B, 0x1F6C, 0x1F6D, 0x1F6E, 0x1F6F,
+    0x1FBA, 0x1FBB, 0x1FC8, 0x1FC9, 0x1FCA, 0x1FCB, 0x1FDA, 0x1FDB,
+    0x1FF8, 0x1FF9, 0x1FEA, 0x1FEB, 0x1FFA, 0x1FFB, 0x0000, 0x0000,
+    0x1F88, 0x1F89, 0x1F8A, 0x1F8B, 0x1F8C, 0x1F8D, 0x1F8E, 0x1F8F,
+    0x1F88, 0x1F89, 0x1F8A, 0x1F8B, 0x1F8C, 0x1F8D, 0x1F8E, 0x1F8F,
+    0x1F98, 0x1F99, 0x1F9A, 0x1F9B, 0x1F9C, 0x1F9D, 0x1F9E, 0x1F9F,
+    0x1F98, 0x1F99, 0x1F9A, 0x1F9B, 0x1F9C, 0x1F9D, 0x1F9E, 0x1F9F,
+    0x1FA8, 0x1FA9, 0x1FAA, 0x1FAB, 0x1FAC, 0x1FAD, 0x1FAE, 0x1FAF,
+    0x1FA8, 0x1FA9, 0x1FAA, 0x1FAB, 0x1FAC, 0x1FAD, 0x1FAE, 0x1FAF,
+    0x1FB8, 0x1FB9, 0x1FB2, 0x1FBC, 0x1FB4, 0x0000, 0x1FB6, 0x1FB7,
+    0x1FB8, 0x1FB9, 0x1FBA, 0x1FBB, 0x1FBC, 0x1FBD, 0x0399, 0x1FBF,
+    0x1FC0, 0x1FC1, 0x1FC2, 0x1FCC, 0x1FC4, 0x0000, 0x1FC6, 0x1FC7,
+    0x1FC8, 0x1FC9, 0x1FCA, 0x1FCB, 0x1FCC, 0x1FCD, 0x1FCE, 0x1FCF,
+    0x1FD8, 0x1FD9, 0x1FD2, 0x1FD3, 0x0000, 0x0000, 0x1FD6, 0x1FD7,
+    0x1FD8, 0x1FD9, 0x1FDA, 0x1FDB, 0x0000, 0x1FDD, 0x1FDE, 0x1FDF,
+    0x1FE8, 0x1FE9, 0x1FE2, 0x1FE3, 0x1FE4, 0x1FEC, 0x1FE6, 0x1FE7,
+    0x1FE8, 0x1FE9, 0x1FEA, 0x1FEB, 0x1FEC, 0x1FED, 0x1FEE, 0x1FEF,
+    0x0000, 0x0000, 0x1FF2, 0x1FFC, 0x1FF4, 0x0000, 0x1FF6, 0x1FF7,
+    0x1FF8, 0x1FF9, 0x1FFA, 0x1FFB, 0x1FFC, 0x1FFD, 0x1FFE, 0x0000
+    };
+
+    *lower = code;
+    *upper = code;
+
+    /* Basic Latin and Latin-1 Supplement, U+0000 to U+00FF */
+    if (code <= 0x00ff) {
+        if (code >= 0x0041 && code <= 0x005a)             /* A-Z */
+            *lower += 0x20;
+        else if (code >= 0x0061 && code <= 0x007a)        /* a-z */
+            *upper -= 0x20;
+        else if ( (code >= 0x00c0 && code <= 0x00d6) ||
+	          (code >= 0x00d8 && code <= 0x00de) )
+            *lower += 0x20;
+        else if ( (code >= 0x00e0 && code <= 0x00f6) ||
+	          (code >= 0x00f8 && code <= 0x00fe) )
+            *upper -= 0x20;
+        else if (code == 0x00ff)      /* y with diaeresis */
+            *upper = 0x0178;
+        else if (code == 0x00b5)      /* micro sign */
+            *upper = 0x039c;
+	return;
+    }
+
+    /* Latin Extended-A, U+0100 to U+017F */
+    if (code >= 0x0100 && code <= 0x017f) {
+        if ( (code >= 0x0100 && code <= 0x012f) ||
+             (code >= 0x0132 && code <= 0x0137) ||
+             (code >= 0x014a && code <= 0x0177) ) {
+            *upper = code & ~1;
+            *lower = code | 1;
+        }
+        else if ( (code >= 0x0139 && code <= 0x0148) ||
+                  (code >= 0x0179 && code <= 0x017e) ) {
+            if (code & 1)
+	        *lower += 1;
+            else
+	        *upper -= 1;
+        }
+        else if (code == 0x0130)
+            *lower = 0x0069;
+        else if (code == 0x0131)
+            *upper = 0x0049;
+        else if (code == 0x0178)
+            *lower = 0x00ff;
+        else if (code == 0x017f)
+            *upper = 0x0053;
+        return;
+    }
+
+    /* Latin Extended-B, U+0180 to U+024F */
+    if (code >= 0x0180 && code <= 0x024f) {
+        if (code >= 0x01cd && code <= 0x01dc) {
+	    if (code & 1)
+	       *lower += 1;
+	    else
+	       *upper -= 1;
+        }
+        else if ( (code >= 0x01de && code <= 0x01ef) ||
+                  (code >= 0x01f4 && code <= 0x01f5) ||
+                  (code >= 0x01f8 && code <= 0x021f) ||
+                  (code >= 0x0222 && code <= 0x0233) ) {
+            *lower |= 1;
+            *upper &= ~1;
+        }
+        else if (code >= 0x0180 && code <= 0x01cc) {
+            *lower = LatinExtB_lower_mapping[code - 0x0180];
+            *upper = LatinExtB_upper_mapping[code - 0x0180];
+        }
+        else if (code == 0x01dd)
+            *upper = 0x018e;
+        else if (code == 0x01f1 || code == 0x01f2) {
+            *lower = 0x01f3;
+            *upper = 0x01f1;
+        }
+        else if (code == 0x01f3)
+            *upper = 0x01f1;
+        else if (code == 0x01f6)
+            *lower = 0x0195;
+        else if (code == 0x01f7)
+            *lower = 0x01bf;
+        else if (code == 0x0220)
+            *lower = 0x019e;
+        return;
+    }
+
+    /* IPA Extensions, U+0250 to U+02AF */
+    if (code >= 0x0253 && code <= 0x0292) {
+        *upper = IPAExt_upper_mapping[code - 0x0253];
+    }
+
+    /* Combining Diacritical Marks, U+0300 to U+036F */
+    if (code == 0x0345) {
+        *upper = 0x0399;
+    }
+
+    /* Greek and Coptic, U+0370 to U+03FF */
+    if (code >= 0x0370 && code <= 0x03ff) {
+        *lower = Greek_lower_mapping[code - 0x0370];
+        *upper = Greek_upper_mapping[code - 0x0370];
+        if (*upper == 0)
+            *upper = code;
+        if (*lower == 0)
+            *lower = code;
+    }
+
+    /* Cyrillic and Cyrillic Supplementary, U+0400 to U+052F */
+    if ( (code >= 0x0400 && code <= 0x04ff) ||
+         (code >= 0x0500 && code <= 0x052f) ) {
+        if (code >= 0x0400 && code <= 0x040f)
+            *lower += 0x50;
+        else if (code >= 0x0410 && code <= 0x042f)
+            *lower += 0x20;
+        else if (code >= 0x0430 && code <= 0x044f)
+            *upper -= 0x20;
+        else if (code >= 0x0450 && code <= 0x045f)
+            *upper -= 0x50;
+        else if ( (code >= 0x0460 && code <= 0x0481) ||
+                  (code >= 0x048a && code <= 0x04bf) ||
+	          (code >= 0x04d0 && code <= 0x04f5) ||
+	          (code >= 0x04f8 && code <= 0x04f9) ||
+                  (code >= 0x0500 && code <= 0x050f) ) {
+            *upper &= ~1;
+            *lower |= 1;
+        }
+        else if (code >= 0x04c1 && code <= 0x04ce) {
+	    if (code & 1)
+	        *lower += 1;
+	    else
+	        *upper -= 1;
+        }
+    }
+
+    /* Armenian, U+0530 to U+058F */
+    if (code >= 0x0530 && code <= 0x058f) {
+        if (code >= 0x0531 && code <= 0x0556)
+            *lower += 0x30;
+        else if (code >=0x0561 && code <= 0x0586)
+            *upper -= 0x30;
+    }
+
+    /* Latin Extended Additional, U+1E00 to U+1EFF */
+    if (code >= 0x1e00 && code <= 0x1eff) {
+        if ( (code >= 0x1e00 && code <= 0x1e95) ||
+             (code >= 0x1ea0 && code <= 0x1ef9) ) {
+            *upper &= ~1;
+            *lower |= 1;
+        }
+        else if (code == 0x1e9b)
+            *upper = 0x1e60;
+    }
+
+    /* Greek Extended, U+1F00 to U+1FFF */
+    if (code >= 0x1f00 && code <= 0x1fff) {
+        *lower = GreekExt_lower_mapping[code - 0x1f00];
+        *upper = GreekExt_upper_mapping[code - 0x1f00];
+        if (*upper == 0)
+            *upper = code;
+        if (*lower == 0)
+            *lower = code;
+    }
+
+    /* Letterlike Symbols, U+2100 to U+214F */
+    if (code >= 0x2100 && code <= 0x214f) {
+        switch (code) {
+        case 0x2126: *lower = 0x03c9; break;
+        case 0x212a: *lower = 0x006b; break;
+        case 0x212b: *lower = 0x00e5; break;
+        }
+    }
+    /* Number Forms, U+2150 to U+218F */
+    else if (code >= 0x2160 && code <= 0x216f)
+        *lower += 0x10;
+    else if (code >= 0x2170 && code <= 0x217f)
+        *upper -= 0x10;
+    /* Enclosed Alphanumerics, U+2460 to U+24FF */
+    else if (code >= 0x24b6 && code <= 0x24cf)
+        *lower += 0x1a;
+    else if (code >= 0x24d0 && code <= 0x24e9)
+        *upper -= 0x1a;
+    /* Halfwidth and Fullwidth Forms, U+FF00 to U+FFEF */
+    else if (code >= 0xff21 && code <= 0xff3a)
+        *lower += 0x20;
+    else if (code >= 0xff41 && code <= 0xff5a)
+        *upper -= 0x20;
+    /* Deseret, U+10400 to U+104FF */
+    else if (code >= 0x10400 && code <= 0x10427)
+        *lower += 0x28;
+    else if (code >= 0x10428 && code <= 0x1044f)
+        *upper -= 0x28;
+}
+
+static void
+XConvertCase(xkb_keysym_t sym, xkb_keysym_t *lower, xkb_keysym_t *upper)
+{
+    /* Latin 1 keysym */
+    if (sym < 0x100) {
+        UCSConvertCase(sym, lower, upper);
+	return;
+    }
+
+    /* Unicode keysym */
+    if ((sym & 0xff000000) == 0x01000000) {
+        UCSConvertCase((sym & 0x00ffffff), lower, upper);
+        *upper |= 0x01000000;
+        *lower |= 0x01000000;
+        return;
+    }
+
+    /* Legacy keysym */
+
+    *lower = sym;
+    *upper = sym;
+
+    switch(sym >> 8) {
+    case 1: /* Latin 2 */
+	/* Assume the KeySym is a legal value (ignore discontinuities) */
+	if (sym == XKB_KEY_Aogonek)
+	    *lower = XKB_KEY_aogonek;
+	else if (sym >= XKB_KEY_Lstroke && sym <= XKB_KEY_Sacute)
+	    *lower += (XKB_KEY_lstroke - XKB_KEY_Lstroke);
+	else if (sym >= XKB_KEY_Scaron && sym <= XKB_KEY_Zacute)
+	    *lower += (XKB_KEY_scaron - XKB_KEY_Scaron);
+	else if (sym >= XKB_KEY_Zcaron && sym <= XKB_KEY_Zabovedot)
+	    *lower += (XKB_KEY_zcaron - XKB_KEY_Zcaron);
+	else if (sym == XKB_KEY_aogonek)
+	    *upper = XKB_KEY_Aogonek;
+	else if (sym >= XKB_KEY_lstroke && sym <= XKB_KEY_sacute)
+	    *upper -= (XKB_KEY_lstroke - XKB_KEY_Lstroke);
+	else if (sym >= XKB_KEY_scaron && sym <= XKB_KEY_zacute)
+	    *upper -= (XKB_KEY_scaron - XKB_KEY_Scaron);
+	else if (sym >= XKB_KEY_zcaron && sym <= XKB_KEY_zabovedot)
+	    *upper -= (XKB_KEY_zcaron - XKB_KEY_Zcaron);
+	else if (sym >= XKB_KEY_Racute && sym <= XKB_KEY_Tcedilla)
+	    *lower += (XKB_KEY_racute - XKB_KEY_Racute);
+	else if (sym >= XKB_KEY_racute && sym <= XKB_KEY_tcedilla)
+	    *upper -= (XKB_KEY_racute - XKB_KEY_Racute);
+	break;
+    case 2: /* Latin 3 */
+	/* Assume the KeySym is a legal value (ignore discontinuities) */
+	if (sym >= XKB_KEY_Hstroke && sym <= XKB_KEY_Hcircumflex)
+	    *lower += (XKB_KEY_hstroke - XKB_KEY_Hstroke);
+	else if (sym >= XKB_KEY_Gbreve && sym <= XKB_KEY_Jcircumflex)
+	    *lower += (XKB_KEY_gbreve - XKB_KEY_Gbreve);
+	else if (sym >= XKB_KEY_hstroke && sym <= XKB_KEY_hcircumflex)
+	    *upper -= (XKB_KEY_hstroke - XKB_KEY_Hstroke);
+	else if (sym >= XKB_KEY_gbreve && sym <= XKB_KEY_jcircumflex)
+	    *upper -= (XKB_KEY_gbreve - XKB_KEY_Gbreve);
+	else if (sym >= XKB_KEY_Cabovedot && sym <= XKB_KEY_Scircumflex)
+	    *lower += (XKB_KEY_cabovedot - XKB_KEY_Cabovedot);
+	else if (sym >= XKB_KEY_cabovedot && sym <= XKB_KEY_scircumflex)
+	    *upper -= (XKB_KEY_cabovedot - XKB_KEY_Cabovedot);
+	break;
+    case 3: /* Latin 4 */
+	/* Assume the KeySym is a legal value (ignore discontinuities) */
+	if (sym >= XKB_KEY_Rcedilla && sym <= XKB_KEY_Tslash)
+	    *lower += (XKB_KEY_rcedilla - XKB_KEY_Rcedilla);
+	else if (sym >= XKB_KEY_rcedilla && sym <= XKB_KEY_tslash)
+	    *upper -= (XKB_KEY_rcedilla - XKB_KEY_Rcedilla);
+	else if (sym == XKB_KEY_ENG)
+	    *lower = XKB_KEY_eng;
+	else if (sym == XKB_KEY_eng)
+	    *upper = XKB_KEY_ENG;
+	else if (sym >= XKB_KEY_Amacron && sym <= XKB_KEY_Umacron)
+	    *lower += (XKB_KEY_amacron - XKB_KEY_Amacron);
+	else if (sym >= XKB_KEY_amacron && sym <= XKB_KEY_umacron)
+	    *upper -= (XKB_KEY_amacron - XKB_KEY_Amacron);
+	break;
+    case 6: /* Cyrillic */
+	/* Assume the KeySym is a legal value (ignore discontinuities) */
+	if (sym >= XKB_KEY_Serbian_DJE && sym <= XKB_KEY_Serbian_DZE)
+	    *lower -= (XKB_KEY_Serbian_DJE - XKB_KEY_Serbian_dje);
+	else if (sym >= XKB_KEY_Serbian_dje && sym <= XKB_KEY_Serbian_dze)
+	    *upper += (XKB_KEY_Serbian_DJE - XKB_KEY_Serbian_dje);
+	else if (sym >= XKB_KEY_Cyrillic_YU && sym <= XKB_KEY_Cyrillic_HARDSIGN)
+	    *lower -= (XKB_KEY_Cyrillic_YU - XKB_KEY_Cyrillic_yu);
+	else if (sym >= XKB_KEY_Cyrillic_yu && sym <= XKB_KEY_Cyrillic_hardsign)
+	    *upper += (XKB_KEY_Cyrillic_YU - XKB_KEY_Cyrillic_yu);
+        break;
+    case 7: /* Greek */
+	/* Assume the KeySym is a legal value (ignore discontinuities) */
+	if (sym >= XKB_KEY_Greek_ALPHAaccent && sym <= XKB_KEY_Greek_OMEGAaccent)
+	    *lower += (XKB_KEY_Greek_alphaaccent - XKB_KEY_Greek_ALPHAaccent);
+	else if (sym >= XKB_KEY_Greek_alphaaccent && sym <= XKB_KEY_Greek_omegaaccent &&
+		 sym != XKB_KEY_Greek_iotaaccentdieresis &&
+		 sym != XKB_KEY_Greek_upsilonaccentdieresis)
+	    *upper -= (XKB_KEY_Greek_alphaaccent - XKB_KEY_Greek_ALPHAaccent);
+	else if (sym >= XKB_KEY_Greek_ALPHA && sym <= XKB_KEY_Greek_OMEGA)
+	    *lower += (XKB_KEY_Greek_alpha - XKB_KEY_Greek_ALPHA);
+	else if (sym >= XKB_KEY_Greek_alpha && sym <= XKB_KEY_Greek_omega &&
+		 sym != XKB_KEY_Greek_finalsmallsigma)
+	    *upper -= (XKB_KEY_Greek_alpha - XKB_KEY_Greek_ALPHA);
+        break;
+    case 0x13: /* Latin 9 */
+        if (sym == XKB_KEY_OE)
+            *lower = XKB_KEY_oe;
+        else if (sym == XKB_KEY_oe)
+            *upper = XKB_KEY_OE;
+        else if (sym == XKB_KEY_Ydiaeresis)
+            *lower = XKB_KEY_ydiaeresis;
+        break;
+    }
+}