integrate lzma

[zpackage] / lzma / common / filter_flags_encoder.c

diff --git a/lzma/common/filter_flags_encoder.c b/lzma/common/filter_flags_encoder.c
new file mode 100644 (file)
index 0000000..d110566
--- /dev/null
+++ b/lzma/common/filter_flags_encoder.c
@@ -0,0 +1,56 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       filter_flags_encoder.c
+/// \brief      Decodes a Filter Flags field
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_encoder.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_filter_flags_size(uint32_t *size, const lzma_filter *filter)
+{
+       if (filter->id >= LZMA_FILTER_RESERVED_START)
+               return LZMA_PROG_ERROR;
+
+       return_if_error(lzma_properties_size(size, filter));
+
+       *size += lzma_vli_size(filter->id) + lzma_vli_size(*size);
+
+       return LZMA_OK;
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_filter_flags_encode(const lzma_filter *filter,
+               uint8_t *out, size_t *out_pos, size_t out_size)
+{
+       // Filter ID
+       if (filter->id >= LZMA_FILTER_RESERVED_START)
+               return LZMA_PROG_ERROR;
+
+       return_if_error(lzma_vli_encode(filter->id, NULL,
+                       out, out_pos, out_size));
+
+       // Size of Properties
+       uint32_t props_size;
+       return_if_error(lzma_properties_size(&props_size, filter));
+       return_if_error(lzma_vli_encode(props_size, NULL,
+                       out, out_pos, out_size));
+
+       // Filter Properties
+       if (out_size - *out_pos < props_size)
+               return LZMA_PROG_ERROR;
+
+       return_if_error(lzma_properties_encode(filter, out + *out_pos));
+
+       *out_pos += props_size;
+
+       return LZMA_OK;
+}