diff options
author | Frederik Gladhorn <frederik.gladhorn@digia.com> | 2014-04-11 14:36:55 +0200 |
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committer | Frederik Gladhorn <frederik.gladhorn@digia.com> | 2014-04-11 14:36:55 +0200 |
commit | 98d3e40fb7c88b670a93e73dace2d0f05a5f903c (patch) | |
tree | b1292124a86c219fb434db4ec28e8f805ff52287 /src/3rdparty/xkbcommon/src/utf8.c | |
parent | a74e4b85be83e2da47f4a1d8fcf0e78079335b80 (diff) | |
parent | bab494e4d046f5617d19f5fec35eeff94377c51f (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.c | 142 |
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; +} |