1 // SPDX-License-Identifier: 0BSD
2
3 ///////////////////////////////////////////////////////////////////////////////
4 //
5 /// \file filter_buffer_encoder.c
6 /// \brief Single-call raw encoding
7 //
8 // Author: Lasse Collin
9 //
10 ///////////////////////////////////////////////////////////////////////////////
11
12 #include "filter_encoder.h"
13
14
15 extern LZMA_API(lzma_ret)
lzma_raw_buffer_encode(const lzma_filter * filters,const lzma_allocator * allocator,const uint8_t * in,size_t in_size,uint8_t * out,size_t * out_pos,size_t out_size)16 lzma_raw_buffer_encode(
17 const lzma_filter *filters, const lzma_allocator *allocator,
18 const uint8_t *in, size_t in_size,
19 uint8_t *out, size_t *out_pos, size_t out_size)
20 {
21 // Validate what isn't validated later in filter_common.c.
22 if ((in == NULL && in_size != 0) || out == NULL
23 || out_pos == NULL || *out_pos > out_size)
24 return LZMA_PROG_ERROR;
25
26 // Initialize the encoder
27 lzma_next_coder next = LZMA_NEXT_CODER_INIT;
28 return_if_error(lzma_raw_encoder_init(&next, allocator, filters));
29
30 // Store the output position so that we can restore it if
31 // something goes wrong.
32 const size_t out_start = *out_pos;
33
34 // Do the actual encoding and free coder's memory.
35 size_t in_pos = 0;
36 lzma_ret ret = next.code(next.coder, allocator, in, &in_pos, in_size,
37 out, out_pos, out_size, LZMA_FINISH);
38 lzma_next_end(&next, allocator);
39
40 if (ret == LZMA_STREAM_END) {
41 ret = LZMA_OK;
42 } else {
43 if (ret == LZMA_OK) {
44 // Output buffer was too small.
45 assert(*out_pos == out_size);
46 ret = LZMA_BUF_ERROR;
47 }
48
49 // Restore the output position.
50 *out_pos = out_start;
51 }
52
53 return ret;
54 }
55