1 /* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 // vim: expandtab:ts=8:sw=4:softtabstop=4:
3 ///////////////////////////////////////////////////////////////////////////////
4 //
5 /// \file easy_encoder.c
6 /// \brief Easy .xz Stream encoder initialization
7 //
8 // Author: Lasse Collin
9 //
10 // This file has been put into the public domain.
11 // You can do whatever you want with this file.
12 //
13 ///////////////////////////////////////////////////////////////////////////////
14
15 #include "easy_preset.h"
16 #include "stream_encoder.h"
17
18
19 struct lzma_coder_s {
20 lzma_next_coder stream_encoder;
21 lzma_options_easy opt_easy;
22 };
23
24
25 static lzma_ret
easy_encode(lzma_coder * coder,lzma_allocator * allocator,const uint8_t * restrict in,size_t * restrict in_pos,size_t in_size,uint8_t * restrict out,size_t * restrict out_pos,size_t out_size,lzma_action action)26 easy_encode(lzma_coder *coder, lzma_allocator *allocator,
27 const uint8_t *restrict in, size_t *restrict in_pos,
28 size_t in_size, uint8_t *restrict out,
29 size_t *restrict out_pos, size_t out_size, lzma_action action)
30 {
31 return coder->stream_encoder.code(
32 coder->stream_encoder.coder, allocator,
33 in, in_pos, in_size, out, out_pos, out_size, action);
34 }
35
36
37 static void
easy_encoder_end(lzma_coder * coder,lzma_allocator * allocator)38 easy_encoder_end(lzma_coder *coder, lzma_allocator *allocator)
39 {
40 lzma_next_end(&coder->stream_encoder, allocator);
41 lzma_free(coder, allocator);
42 return;
43 }
44
45
46 static lzma_ret
easy_encoder_init(lzma_next_coder * next,lzma_allocator * allocator,uint32_t preset,lzma_check check)47 easy_encoder_init(lzma_next_coder *next, lzma_allocator *allocator,
48 uint32_t preset, lzma_check check)
49 {
50 lzma_next_coder_init(&easy_encoder_init, next, allocator);
51
52 if (next->coder == NULL) {
53 next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
54 if (next->coder == NULL)
55 return LZMA_MEM_ERROR;
56
57 next->code = &easy_encode;
58 next->end = &easy_encoder_end;
59
60 next->coder->stream_encoder = LZMA_NEXT_CODER_INIT;
61 }
62
63 if (lzma_easy_preset(&next->coder->opt_easy, preset))
64 return LZMA_OPTIONS_ERROR;
65
66 return lzma_stream_encoder_init(&next->coder->stream_encoder,
67 allocator, next->coder->opt_easy.filters, check);
68 }
69
70
71 extern LZMA_API(lzma_ret)
lzma_easy_encoder(lzma_stream * strm,uint32_t preset,lzma_check check)72 lzma_easy_encoder(lzma_stream *strm, uint32_t preset, lzma_check check)
73 {
74 lzma_next_strm_init(easy_encoder_init, strm, preset, check);
75
76 strm->internal->supported_actions[LZMA_RUN] = true;
77 strm->internal->supported_actions[LZMA_SYNC_FLUSH] = true;
78 strm->internal->supported_actions[LZMA_FULL_FLUSH] = true;
79 strm->internal->supported_actions[LZMA_FINISH] = true;
80
81 return LZMA_OK;
82 }
83