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authorFrederik Gladhorn <frederik.gladhorn@digia.com>2014-04-11 14:36:55 +0200
committerFrederik Gladhorn <frederik.gladhorn@digia.com>2014-04-11 14:36:55 +0200
commit98d3e40fb7c88b670a93e73dace2d0f05a5f903c (patch)
treeb1292124a86c219fb434db4ec28e8f805ff52287 /src/3rdparty/xkbcommon/src/utf8.c
parenta74e4b85be83e2da47f4a1d8fcf0e78079335b80 (diff)
parentbab494e4d046f5617d19f5fec35eeff94377c51f (diff)
Merge remote-tracking branch 'origin/stable' into dev
Conflicts: mkspecs/qnx-armv7le-qcc/qplatformdefs.h src/printsupport/kernel/qcups.cpp src/widgets/styles/qstyle.h tests/auto/widgets/itemviews/qlistwidget/tst_qlistwidget.cpp Change-Id: Ia41e13051169a6d4a8a1267548e7d47b859bb267
Diffstat (limited to 'src/3rdparty/xkbcommon/src/utf8.c')
-rw-r--r--src/3rdparty/xkbcommon/src/utf8.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/src/3rdparty/xkbcommon/src/utf8.c b/src/3rdparty/xkbcommon/src/utf8.c
new file mode 100644
index 0000000000..11382c809d
--- /dev/null
+++ b/src/3rdparty/xkbcommon/src/utf8.c
@@ -0,0 +1,142 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ * Copyright © 2014 Ran Benita <ran234@gmail.com>
+ *
+ * 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.
+ *
+ * Author: Rob Bradford <rob@linux.intel.com>
+ */
+
+#include <stddef.h>
+#include <stdbool.h>
+#include <inttypes.h>
+
+#include "utf8.h"
+
+int
+utf32_to_utf8(uint32_t unichar, char *buffer)
+{
+ int count, shift, length;
+ uint8_t head;
+
+ if (unichar <= 0x007f) {
+ buffer[0] = unichar;
+ buffer[1] = '\0';
+ return 2;
+ }
+ else if (unichar <= 0x07FF) {
+ length = 2;
+ head = 0xc0;
+ }
+ else if (unichar <= 0xffff) {
+ length = 3;
+ head = 0xe0;
+ }
+ else if (unichar <= 0x1fffff) {
+ length = 4;
+ head = 0xf0;
+ }
+ else if (unichar <= 0x3ffffff) {
+ length = 5;
+ head = 0xf8;
+ }
+ else {
+ length = 6;
+ head = 0xfc;
+ }
+
+ for (count = length - 1, shift = 0; count > 0; count--, shift += 6)
+ buffer[count] = 0x80 | ((unichar >> shift) & 0x3f);
+
+ buffer[0] = head | ((unichar >> shift) & 0x3f);
+ buffer[length] = '\0';
+
+ return length + 1;
+}
+
+bool
+is_valid_utf8(const char *ss, size_t len)
+{
+ size_t i = 0;
+ size_t tail_bytes = 0;
+ const uint8_t *s = (const uint8_t *) ss;
+
+ /* This beauty is from:
+ * The Unicode Standard Version 6.2 - Core Specification, Table 3.7
+ * http://www.unicode.org/versions/Unicode6.2.0/ch03.pdf#G7404
+ * We can optimize if needed. */
+ while (i < len)
+ {
+ if (s[i] <= 0x7F) {
+ tail_bytes = 0;
+ }
+ else if (s[i] >= 0xC2 && s[i] <= 0xDF) {
+ tail_bytes = 1;
+ }
+ else if (s[i] == 0xE0) {
+ i++;
+ if (i >= len || !(s[i] >= 0xA0 && s[i] <= 0xBF))
+ return false;
+ tail_bytes = 1;
+ }
+ else if (s[i] >= 0xE1 && s[i] <= 0xEC) {
+ tail_bytes = 2;
+ }
+ else if (s[i] == 0xED) {
+ i++;
+ if (i >= len || !(s[i] >= 0x80 && s[i] <= 0x9F))
+ return false;
+ tail_bytes = 1;
+ }
+ else if (s[i] >= 0xEE && s[i] <= 0xEF) {
+ tail_bytes = 2;
+ }
+ else if (s[i] == 0xF0) {
+ i++;
+ if (i >= len || !(s[i] >= 0x90 && s[i] <= 0xBF))
+ return false;
+ tail_bytes = 2;
+ }
+ else if (s[i] >= 0xF1 && s[i] <= 0xF3) {
+ tail_bytes = 3;
+ }
+ else if (s[i] == 0xF4) {
+ i++;
+ if (i >= len || !(s[i] >= 0x80 && s[i] <= 0x8F))
+ return false;
+ tail_bytes = 2;
+ }
+ else {
+ return false;
+ }
+
+ i++;
+
+ while (i < len && tail_bytes > 0 && s[i] >= 0x80 && s[i] <= 0xBF) {
+ i++;
+ tail_bytes--;
+ }
+
+ if (tail_bytes != 0)
+ return false;
+ }
+
+ return true;
+}