brotli + zstdmd update

C/zstdmt/lz4-mt_common.c

@@ -0,0 +1,62 @@
+
+/**
+ * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
+ * Copyright (c) 2016 Tino Reichardt
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#include "lz4frame.h"
+#include "lz4-mt.h"
+
+/* will be used for lib errors */
+size_t lz4mt_errcode;
+
+/* ****************************************
+ * LZ4MT Error Management
+ ******************************************/
+
+/**
+ * LZ4MT_isError() - tells if a return value is an error code
+ */
+unsigned LZ4MT_isError(size_t code)
+{
+	return (code > ERROR(maxCode));
+}
+
+/**
+ * LZ4MT_getErrorString() - give error code string from function result
+ */
+const char *LZ4MT_getErrorString(size_t code)
+{
+	if (LZ4F_isError(lz4mt_errcode))
+		return LZ4F_getErrorName(lz4mt_errcode);
+
+	static const char *notErrorCode = "Unspecified error lz4mt code";
+	switch ((LZ4MT_ErrorCode) (0 - code)) {
+	case PREFIX(no_error):
+		return "No error detected";
+	case PREFIX(memory_allocation):
+		return "Allocation error : not enough memory";
+	case PREFIX(read_fail):
+		return "Read failure";
+	case PREFIX(write_fail):
+		return "Write failure";
+	case PREFIX(data_error):
+		return "Malformed input";
+	case PREFIX(frame_compress):
+		return "Could not compress frame at once";
+	case PREFIX(frame_decompress):
+		return "Could not decompress frame at once";
+	case PREFIX(compressionParameter_unsupported):
+		return "Compression parameter is out of bound";
+	case PREFIX(compression_library):
+		return "Compression library reports failure";
+	case PREFIX(maxCode):
+	default:
+		return notErrorCode;
+	}
+}