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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /gfx/graphite2/src/inc/Compression.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'gfx/graphite2/src/inc/Compression.h')
-rw-r--r--gfx/graphite2/src/inc/Compression.h103
1 files changed, 103 insertions, 0 deletions
diff --git a/gfx/graphite2/src/inc/Compression.h b/gfx/graphite2/src/inc/Compression.h
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+++ b/gfx/graphite2/src/inc/Compression.h
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+/* GRAPHITE2 LICENSING
+
+ Copyright 2015, SIL International
+ All rights reserved.
+
+ This library is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should also have received a copy of the GNU Lesser General Public
+ License along with this library in the file named "LICENSE".
+ If not, write to the Free Software Foundation, 51 Franklin Street,
+ Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
+ internet at http://www.fsf.org/licenses/lgpl.html.
+
+Alternatively, the contents of this file may be used under the terms of the
+Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
+License, as published by the Free Software Foundation, either version 2
+of the License or (at your option) any later version.
+*/
+
+#pragma once
+
+#include <cassert>
+#include <cstddef>
+#include <cstring>
+
+namespace
+{
+
+#if defined(_MSC_VER)
+typedef unsigned __int8 u8;
+typedef unsigned __int16 u16;
+typedef unsigned __int32 u32;
+typedef unsigned __int64 u64;
+#else
+#include <stdint.h>
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+#endif
+
+ptrdiff_t const MINMATCH = 4;
+
+template<int S>
+inline
+void unaligned_copy(void * d, void const * s) {
+ ::memcpy(d, s, S);
+}
+
+inline
+size_t align(size_t p) {
+ return (p + sizeof(unsigned long)-1) & ~(sizeof(unsigned long)-1);
+}
+
+inline
+u8 * safe_copy(u8 * d, u8 const * s, size_t n) {
+ while (n--) *d++ = *s++;
+ return d;
+}
+
+inline
+u8 * overrun_copy(u8 * d, u8 const * s, size_t n) {
+ size_t const WS = sizeof(unsigned long);
+ u8 const * e = s + n;
+ do
+ {
+ unaligned_copy<WS>(d, s);
+ d += WS;
+ s += WS;
+ }
+ while (s < e);
+ d-=(s-e);
+
+ return d;
+}
+
+
+inline
+u8 * fast_copy(u8 * d, u8 const * s, size_t n) {
+ size_t const WS = sizeof(unsigned long);
+ size_t wn = n/WS;
+ while (wn--)
+ {
+ unaligned_copy<WS>(d, s);
+ d += WS;
+ s += WS;
+ }
+ n &= WS-1;
+ return safe_copy(d, s, n);
+}
+
+
+} // end of anonymous namespace
+
+