1/*
2 * Copyright (c) 2017, Intel Corporation
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * * Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of Intel Corporation nor the names of its contributors
13 * may be used to endorse or promote products derived from this software
14 * without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "stream_compress.h"
30
31#include "state.h"
32#include "nfa/nfa_internal.h"
33#include "rose/rose_internal.h"
34#include "util/multibit.h"
35#include "util/multibit_compress.h"
36#include "util/uniform_ops.h"
37
38#include <string.h>
39
40#define COPY_IN(p, sz) do { \
41 assert(currOffset + sz <= buf_size); \
42 memcpy(buf + currOffset, p, sz); \
43 currOffset += sz; \
44 DEBUG_PRINTF("co = %zu\n", currOffset); \
45 } while (0);
46
47#define COPY_OUT(p, sz) do { \
48 if (currOffset + sz > buf_size) { \
49 return 0; \
50 } \
51 memcpy(p, buf + currOffset, sz); \
52 currOffset += sz; \
53 DEBUG_PRINTF("co = %zu\n", currOffset); \
54 } while (0);
55
56#define SIZE_COPY_IN(p, sz) do { \
57 currOffset += sz; \
58 DEBUG_PRINTF("co = %zu\n", currOffset); \
59 } while (0);
60
61#define COPY_MULTIBIT_IN(p, total_bits) do { \
62 size_t sz; \
63 STREAM_QUAL u8 *bits = (STREAM_QUAL u8 *)p; \
64 BUF_QUAL u8 *comp = (BUF_QUAL u8 *)(buf + currOffset); \
65 if (!mmbit_compress(bits, total_bits, comp, &sz, \
66 buf_size - currOffset)) { \
67 return 0; /* error */ \
68 } \
69 currOffset += sz; \
70 DEBUG_PRINTF("co = %zu\n", currOffset); \
71 } while (0);
72
73#define COPY_MULTIBIT_OUT(p, total_bits) do { \
74 size_t sz; \
75 STREAM_QUAL u8 *bits = (STREAM_QUAL u8 *)p; \
76 BUF_QUAL u8 *comp = (BUF_QUAL u8 *)(buf + currOffset); \
77 if (!mmbit_decompress(bits, total_bits, comp, &sz, \
78 buf_size - currOffset)) { \
79 return 0; /* error */ \
80 } \
81 currOffset += sz; \
82 DEBUG_PRINTF("co = %zu\n", currOffset); \
83 } while (0);
84
85#define COPY_MULTIBIT_SIZE(p, total_bits) do { \
86 STREAM_QUAL u8 *bits = (STREAM_QUAL u8 *)p; \
87 size_t sz = mmbit_compsize(bits, total_bits); \
88 currOffset += sz; \
89 DEBUG_PRINTF("co = %zu\n", currOffset); \
90 } while (0);
91
92#define COPY COPY_OUT
93#define COPY_MULTIBIT COPY_MULTIBIT_OUT
94#define ASSIGN(lhs, rhs) do { lhs = rhs; } while (0)
95#define FN_SUFFIX expand
96#define STREAM_QUAL
97#define BUF_QUAL const
98#include "stream_compress_impl.h"
99
100int expand_stream(struct hs_stream *stream, const struct RoseEngine *rose,
101 const char *buf, size_t buf_size) {
102 return sc_expand(rose, stream, buf, buf_size);
103}
104
105#define COPY COPY_IN
106#define COPY_MULTIBIT COPY_MULTIBIT_IN
107#define ASSIGN(lhs, rhs) do { } while (0)
108#define FN_SUFFIX compress
109#define STREAM_QUAL const
110#define BUF_QUAL
111#include "stream_compress_impl.h"
112
113size_t compress_stream(char *buf, size_t buf_size,
114 const struct RoseEngine *rose,
115 const struct hs_stream *stream) {
116 return sc_compress(rose, stream, buf, buf_size);
117}
118
119#define COPY SIZE_COPY_IN
120#define COPY_MULTIBIT COPY_MULTIBIT_SIZE
121#define ASSIGN(lhs, rhs) do { } while (0)
122#define FN_SUFFIX size
123#define STREAM_QUAL const
124#define BUF_QUAL UNUSED
125#include "stream_compress_impl.h"
126
127size_t size_compress_stream(const struct RoseEngine *rose,
128 const struct hs_stream *stream) {
129 return sc_size(rose, stream, NULL, 0);
130}
131