integrate lzma

[zpackage] / lzma / common / filter_decoder.c

diff --git a/lzma/common/filter_decoder.c b/lzma/common/filter_decoder.c
new file mode 100644 (file)
index 0000000..c75b0a8
--- /dev/null
+++ b/lzma/common/filter_decoder.c
@@ -0,0 +1,184 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       filter_decoder.c
+/// \brief      Filter ID mapping to filter-specific functions
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "filter_decoder.h"
+#include "filter_common.h"
+#include "lzma_decoder.h"
+#include "lzma2_decoder.h"
+#include "simple_decoder.h"
+#include "delta_decoder.h"
+
+
+typedef struct {
+       /// Filter ID
+       lzma_vli id;
+
+       /// Initializes the filter encoder and calls lzma_next_filter_init()
+       /// for filters + 1.
+       lzma_init_function init;
+
+       /// Calculates memory usage of the encoder. If the options are
+       /// invalid, UINT64_MAX is returned.
+       uint64_t (*memusage)(const void *options);
+
+       /// Decodes Filter Properties.
+       ///
+       /// \return     - LZMA_OK: Properties decoded successfully.
+       ///             - LZMA_OPTIONS_ERROR: Unsupported properties
+       ///             - LZMA_MEM_ERROR: Memory allocation failed.
+       lzma_ret (*props_decode)(
+                       void **options, const lzma_allocator *allocator,
+                       const uint8_t *props, size_t props_size);
+
+} lzma_filter_decoder;
+
+
+static const lzma_filter_decoder decoders[] = {
+#ifdef HAVE_DECODER_LZMA1
+       {
+               .id = LZMA_FILTER_LZMA1,
+               .init = &lzma_lzma_decoder_init,
+               .memusage = &lzma_lzma_decoder_memusage,
+               .props_decode = &lzma_lzma_props_decode,
+       },
+#endif
+#ifdef HAVE_DECODER_LZMA2
+       {
+               .id = LZMA_FILTER_LZMA2,
+               .init = &lzma_lzma2_decoder_init,
+               .memusage = &lzma_lzma2_decoder_memusage,
+               .props_decode = &lzma_lzma2_props_decode,
+       },
+#endif
+#ifdef HAVE_DECODER_X86
+       {
+               .id = LZMA_FILTER_X86,
+               .init = &lzma_simple_x86_decoder_init,
+               .memusage = NULL,
+               .props_decode = &lzma_simple_props_decode,
+       },
+#endif
+#ifdef HAVE_DECODER_POWERPC
+       {
+               .id = LZMA_FILTER_POWERPC,
+               .init = &lzma_simple_powerpc_decoder_init,
+               .memusage = NULL,
+               .props_decode = &lzma_simple_props_decode,
+       },
+#endif
+#ifdef HAVE_DECODER_IA64
+       {
+               .id = LZMA_FILTER_IA64,
+               .init = &lzma_simple_ia64_decoder_init,
+               .memusage = NULL,
+               .props_decode = &lzma_simple_props_decode,
+       },
+#endif
+#ifdef HAVE_DECODER_ARM
+       {
+               .id = LZMA_FILTER_ARM,
+               .init = &lzma_simple_arm_decoder_init,
+               .memusage = NULL,
+               .props_decode = &lzma_simple_props_decode,
+       },
+#endif
+#ifdef HAVE_DECODER_ARMTHUMB
+       {
+               .id = LZMA_FILTER_ARMTHUMB,
+               .init = &lzma_simple_armthumb_decoder_init,
+               .memusage = NULL,
+               .props_decode = &lzma_simple_props_decode,
+       },
+#endif
+#ifdef HAVE_DECODER_SPARC
+       {
+               .id = LZMA_FILTER_SPARC,
+               .init = &lzma_simple_sparc_decoder_init,
+               .memusage = NULL,
+               .props_decode = &lzma_simple_props_decode,
+       },
+#endif
+#ifdef HAVE_DECODER_DELTA
+       {
+               .id = LZMA_FILTER_DELTA,
+               .init = &lzma_delta_decoder_init,
+               .memusage = &lzma_delta_coder_memusage,
+               .props_decode = &lzma_delta_props_decode,
+       },
+#endif
+};
+
+
+static const lzma_filter_decoder *
+decoder_find(lzma_vli id)
+{
+       for (size_t i = 0; i < ARRAY_SIZE(decoders); ++i)
+               if (decoders[i].id == id)
+                       return decoders + i;
+
+       return NULL;
+}
+
+
+extern LZMA_API(lzma_bool)
+lzma_filter_decoder_is_supported(lzma_vli id)
+{
+       return decoder_find(id) != NULL;
+}
+
+
+extern lzma_ret
+lzma_raw_decoder_init(lzma_next_coder *next, const lzma_allocator *allocator,
+               const lzma_filter *options)
+{
+       return lzma_raw_coder_init(next, allocator,
+                       options, (lzma_filter_find)(&decoder_find), false);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_raw_decoder(lzma_stream *strm, const lzma_filter *options)
+{
+       lzma_next_strm_init(lzma_raw_decoder_init, strm, options);
+
+       strm->internal->supported_actions[LZMA_RUN] = true;
+       strm->internal->supported_actions[LZMA_FINISH] = true;
+
+       return LZMA_OK;
+}
+
+
+extern LZMA_API(uint64_t)
+lzma_raw_decoder_memusage(const lzma_filter *filters)
+{
+       return lzma_raw_coder_memusage(
+                       (lzma_filter_find)(&decoder_find), filters);
+}
+
+
+extern LZMA_API(lzma_ret)
+lzma_properties_decode(lzma_filter *filter, const lzma_allocator *allocator,
+               const uint8_t *props, size_t props_size)
+{
+       // Make it always NULL so that the caller can always safely free() it.
+       filter->options = NULL;
+
+       const lzma_filter_decoder *const fd = decoder_find(filter->id);
+       if (fd == NULL)
+               return LZMA_OPTIONS_ERROR;
+
+       if (fd->props_decode == NULL)
+               return props_size == 0 ? LZMA_OK : LZMA_OPTIONS_ERROR;
+
+       return fd->props_decode(
+                       &filter->options, allocator, props, props_size);
+}