Import of liblzma, xz, xzdec, lzmainfo from vendor branch

Add support for xz and lzma to lesspipe.sh (xzless, lzless)
Bump __FreeBSD_version

Approved by:	delphij (mentor)
MFC after:	2 weeks

1 files changed, 30 insertions, 0 deletions

diff --git a/contrib/xz/src/liblzma/common/vli_size.c b/contrib/xz/src/liblzma/common/vli_size.c
new file mode 100644
index 0000000..ec1b4fa
--- /dev/null
+++ b/contrib/xz/src/liblzma/common/vli_size.c
@@ -0,0 +1,30 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       vli_size.c
+/// \brief      Calculates the encoded size of a variable-length integer
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+extern LZMA_API(uint32_t)
+lzma_vli_size(lzma_vli vli)
+{
+	if (vli > LZMA_VLI_MAX)
+		return 0;
+
+	uint32_t i = 0;
+	do {
+		vli >>= 7;
+		++i;
+	} while (vli != 0);
+
+	assert(i <= LZMA_VLI_BYTES_MAX);
+	return i;
+}