1 ///////////////////////////////////////////////////////////////////////////////
2 //
3 /// \file filter_buffer_encoder.c
4 /// \brief Single-call raw encoding
5 //
6 // Author: Lasse Collin
7 //
8 // This file has been put into the public domain.
9 // You can do whatever you want with this file.
10 //
11 ///////////////////////////////////////////////////////////////////////////////
12
13 #include "filter_encoder.h"
14
15
16 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)17 lzma_raw_buffer_encode(
18 const lzma_filter *filters, const lzma_allocator *allocator,
19 const uint8_t *in, size_t in_size,
20 uint8_t *out, size_t *out_pos, size_t out_size)
21 {
22 // Validate what isn't validated later in filter_common.c.
23 if ((in == NULL && in_size != 0) || out == NULL
24 || out_pos == NULL || *out_pos > out_size)
25 return LZMA_PROG_ERROR;
26
27 // Initialize the encoder
28 lzma_next_coder next = LZMA_NEXT_CODER_INIT;
29 return_if_error(lzma_raw_encoder_init(&next, allocator, filters));
30
31 // Store the output position so that we can restore it if
32 // something goes wrong.
33 const size_t out_start = *out_pos;
34
35 // Do the actual encoding and free coder's memory.
36 size_t in_pos = 0;
37 lzma_ret ret = next.code(next.coder, allocator, in, &in_pos, in_size,
38 out, out_pos, out_size, LZMA_FINISH);
39 lzma_next_end(&next, allocator);
40
41 if (ret == LZMA_STREAM_END) {
42 ret = LZMA_OK;
43 } else {
44 if (ret == LZMA_OK) {
45 // Output buffer was too small.
46 assert(*out_pos == out_size);
47 ret = LZMA_BUF_ERROR;
48 }
49
50 // Restore the output position.
51 *out_pos = out_start;
52 }
53
54 return ret;
55 }
56