1 ///////////////////////////////////////////////////////////////////////////////
3 /// \file filter_buffer_decoder.c
4 /// \brief Single-call raw decoding
6 // Author: Lasse Collin
8 // This file has been put into the public domain.
9 // You can do whatever you want with this file.
11 ///////////////////////////////////////////////////////////////////////////////
13 #include "filter_decoder.h"
16 extern LZMA_API(lzma_ret
)
17 lzma_raw_buffer_decode(const lzma_filter
*filters
, lzma_allocator
*allocator
,
18 const uint8_t *in
, size_t *in_pos
, size_t in_size
,
19 uint8_t *out
, size_t *out_pos
, size_t out_size
)
21 // Validate what isn't validated later in filter_common.c.
22 if (in
== NULL
|| in_pos
== NULL
|| *in_pos
> in_size
|| out
== NULL
23 || out_pos
== NULL
|| *out_pos
> out_size
)
24 return LZMA_PROG_ERROR
;
26 // Initialize the decoer.
27 lzma_next_coder next
= LZMA_NEXT_CODER_INIT
;
28 return_if_error(lzma_raw_decoder_init(&next
, allocator
, filters
));
30 // Store the positions so that we can restore them if something
32 const size_t in_start
= *in_pos
;
33 const size_t out_start
= *out_pos
;
35 // Do the actual decoding and free decoder's memory.
36 lzma_ret ret
= next
.code(next
.coder
, allocator
, in
, in_pos
, in_size
,
37 out
, out_pos
, out_size
, LZMA_FINISH
);
39 if (ret
== LZMA_STREAM_END
) {
43 // Either the input was truncated or the
44 // output buffer was too small.
45 assert(*in_pos
== in_size
|| *out_pos
== out_size
);
47 if (*in_pos
!= in_size
) {
48 // Since input wasn't consumed completely,
49 // the output buffer became full and is
53 } else if (*out_pos
!= out_size
) {
54 // Since output didn't became full, the input
55 // has to be truncated.
56 ret
= LZMA_DATA_ERROR
;
59 // All the input was consumed and output
60 // buffer is full. Now we don't immediately
61 // know the reason for the error. Try
62 // decoding one more byte. If it succeeds,
63 // then the output buffer was too small. If
64 // we cannot get a new output byte, the input
68 (void)next
.code(next
.coder
, allocator
,
70 tmp
, &tmp_pos
, 1, LZMA_FINISH
);
75 ret
= LZMA_DATA_ERROR
;
79 // Restore the positions.
84 lzma_next_end(&next
, allocator
);