Initialer Commit

2025-12-10 00:07:06 -06:00 · 2016-06-25 21:15:50 +02:00
commit c3967fe27a
1199 changed files with 290375 additions and 0 deletions
--- a/C/zstd/zstd_legacy.h
+++ b/C/zstd/zstd_legacy.h
@@ -0,0 +1,101 @@
+/*
+    zstd_legacy - decoder for legacy format
+    Header File
+    Copyright (C) 2015-2016, Yann Collet.
+
+    BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are
+    met:
+    * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+    copyright notice, this list of conditions and the following disclaimer
+    in the documentation and/or other materials provided with the
+    distribution.
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+    You can contact the author at :
+    - zstd source repository : https://github.com/Cyan4973/zstd
+    - ztsd public forum : https://groups.google.com/forum/#!forum/lz4c
+*/
+#ifndef ZSTD_LEGACY_H
+#define ZSTD_LEGACY_H
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+/* *************************************
+*  Includes
+***************************************/
+#include "mem.h"            /* MEM_STATIC */
+#include "error_private.h"  /* ERROR */
+#include "zstd_v05.h"
+#include "zstd_v06.h"
+
+
+/** ZSTD_isLegacy() :
+    @return : > 0 if supported by legacy decoder. 0 otherwise.
+              return value is the version.
+*/
+MEM_STATIC unsigned ZSTD_isLegacy (U32 magicNumberLE)
+{
+	switch(magicNumberLE)
+	{
+		case ZSTDv05_MAGICNUMBER : return 5;
+		case ZSTDv06_MAGICNUMBER : return 6;
+		default : return 0;
+	}
+}
+
+
+MEM_STATIC size_t ZSTD_decompressLegacy(
+                     void* dst, size_t dstCapacity,
+               const void* src, size_t compressedSize,
+               const void* dict,size_t dictSize,
+                     U32 magicNumberLE)
+{
+	switch(magicNumberLE)
+	{
+		case ZSTDv05_MAGICNUMBER :
+		    {
+		        size_t result;
+		        ZSTDv05_DCtx* zd = ZSTDv05_createDCtx();
+		        if (zd==NULL) return ERROR(memory_allocation);
+		        result = ZSTDv05_decompress_usingDict(zd, dst, dstCapacity, src, compressedSize, dict, dictSize);
+		        ZSTDv05_freeDCtx(zd);
+		        return result;
+		    }
+		case ZSTDv06_MAGICNUMBER :
+		    {
+		        size_t result;
+		        ZSTDv06_DCtx* zd = ZSTDv06_createDCtx();
+		        if (zd==NULL) return ERROR(memory_allocation);
+		        result = ZSTDv06_decompress_usingDict(zd, dst, dstCapacity, src, compressedSize, dict, dictSize);
+		        ZSTDv06_freeDCtx(zd);
+		        return result;
+		    }
+		default :
+		    return ERROR(prefix_unknown);
+	}
+}
+
+
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif   /* ZSTD_LEGACY_H */