/src/ghostpdl/base/sbrotlid.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* Copyright (C) 2025 Artifex Software, Inc. |
2 | | All Rights Reserved. |
3 | | |
4 | | This software is provided AS-IS with no warranty, either express or |
5 | | implied. |
6 | | |
7 | | This software is distributed under license and may not be copied, |
8 | | modified or distributed except as expressly authorized under the terms |
9 | | of the license contained in the file LICENSE in this distribution. |
10 | | |
11 | | Refer to licensing information at http://www.artifex.com or contact |
12 | | Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco, |
13 | | CA 94129, USA, for further information. |
14 | | */ |
15 | | |
16 | | |
17 | | /* brotli decoding (decompression) filter stream */ |
18 | | #include "memory_.h" |
19 | | #include "std.h" |
20 | | #include "strimpl.h" |
21 | | #include "sbrotlix.h" |
22 | | |
23 | | #include "brotli/decode.h" |
24 | | |
25 | | /* Initialize the filter. */ |
26 | | static int |
27 | | s_brotliD_init(stream_state * st) |
28 | 0 | { |
29 | 0 | stream_brotlid_state *ss = (stream_brotlid_state *)st; |
30 | |
|
31 | 0 | ss->dec_state = BrotliDecoderCreateInstance( |
32 | 0 | s_brotli_alloc, |
33 | 0 | s_brotli_free, |
34 | 0 | st->memory->non_gc_memory); |
35 | 0 | if (ss->dec_state == NULL) |
36 | 0 | return ERRC; |
37 | 0 | st->min_left=1; |
38 | 0 | return 0; |
39 | 0 | } |
40 | | |
41 | | /* Process a buffer */ |
42 | | static int |
43 | | s_brotliD_process(stream_state * st, stream_cursor_read * pr, |
44 | | stream_cursor_write * pw, bool ignore_last) |
45 | 0 | { |
46 | 0 | stream_brotlid_state *const ss = (stream_brotlid_state *)st; |
47 | 0 | const byte *p = pr->ptr; |
48 | 0 | const byte *inBuf = p + 1; |
49 | 0 | size_t inLen = pr->limit - p; |
50 | 0 | byte *outBuf = pw->ptr + 1; |
51 | 0 | size_t outLen = pw->limit - pw->ptr; |
52 | 0 | BrotliDecoderResult status; |
53 | |
|
54 | 0 | status = BrotliDecoderDecompressStream((BrotliDecoderState *)ss->dec_state, |
55 | 0 | &inLen, /* Available in */ |
56 | 0 | &inBuf, /* Input buffer */ |
57 | 0 | &outLen, /* Available out */ |
58 | 0 | &outBuf, /* Output buffer */ |
59 | 0 | NULL); |
60 | 0 | pr->ptr = inBuf - 1; |
61 | 0 | pw->ptr = outBuf - 1; |
62 | 0 | switch (status) { |
63 | 0 | case BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT: |
64 | 0 | return 0; |
65 | 0 | case BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT: |
66 | 0 | return 1; |
67 | 0 | case BROTLI_DECODER_RESULT_SUCCESS: |
68 | 0 | return EOFC; |
69 | 0 | default: |
70 | 0 | return ERRC; |
71 | 0 | } |
72 | 0 | } |
73 | | |
74 | | /* Release the stream */ |
75 | | static void |
76 | | s_brotliD_release(stream_state * st) |
77 | 0 | { |
78 | 0 | stream_brotlid_state *ss = (stream_brotlid_state *)st; |
79 | |
|
80 | 0 | if (ss->dec_state != NULL) |
81 | 0 | { |
82 | 0 | BrotliDecoderDestroyInstance((BrotliDecoderState *)ss->dec_state); |
83 | 0 | ss->dec_state = NULL; |
84 | 0 | } |
85 | 0 | } |
86 | | |
87 | | static void |
88 | | brotliD_final(const gs_memory_t *mem, void *st) |
89 | 0 | { |
90 | 0 | stream_brotlid_state *ss = (stream_brotlid_state *)st; |
91 | |
|
92 | 0 | if (ss->dec_state != NULL) |
93 | 0 | { |
94 | 0 | BrotliDecoderDestroyInstance((BrotliDecoderState *)ss->dec_state); |
95 | 0 | ss->dec_state = NULL; |
96 | 0 | } |
97 | 0 | } |
98 | | |
99 | | gs_public_st_simple_final(st_brotlid_state, stream_brotlid_state, |
100 | | "brotli decode state", brotliD_final); |
101 | | |
102 | | /* Stream template */ |
103 | | const stream_template s_brotliD_template = { |
104 | | &st_brotlid_state, s_brotliD_init, s_brotliD_process, 1, 1, s_brotliD_release |
105 | | }; |