riegeli 0.1.2

Rust implementation of the Riegeli/records file format
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295

//! Adversarial tests for transpose encoding edge cases.

mod common;

use common::{cpp_read, cpp_write, cross_lang_roundtrip, rust_read, rust_write};
use riegeli::{CompressionType, WriterOptions as RustWriterOptions};
use riegeli_ffi::{Compression, WriterOptions as FfiWriterOptions};

// ---------------------------------------------------------------------------
// Adversarial: all-empty records through transpose
// ---------------------------------------------------------------------------

#[test]
fn adversarial_transpose_all_empty_records_rust_to_cpp() {
    let records: Vec<Vec<u8>> = (0..50).map(|_| vec![]).collect();
    cross_lang_roundtrip(
        "adversarial: all-empty records transpose+brotli rust->cpp",
        &records,
        |recs| {
            rust_write(
                recs,
                RustWriterOptions::new()
                    .compression(CompressionType::Brotli)
                    .transpose(true),
            )
        },
        cpp_read,
    );
}

#[test]
fn adversarial_transpose_all_empty_records_cpp_to_rust() {
    let records: Vec<Vec<u8>> = (0..50).map(|_| vec![]).collect();
    cross_lang_roundtrip(
        "adversarial: all-empty records transpose+brotli cpp->rust",
        &records,
        |recs| {
            cpp_write(
                recs,
                FfiWriterOptions::new()
                    .compression(Compression::Brotli(6))
                    .transpose(true),
            )
        },
        rust_read,
    );
}

// ---------------------------------------------------------------------------
// Adversarial: all-identical records (maximally compressible)
// ---------------------------------------------------------------------------

#[test]
fn adversarial_transpose_identical_records_rust_to_cpp() {
    let record = vec![0xDEu8; 256];
    let records: Vec<Vec<u8>> = (0..200).map(|_| record.clone()).collect();
    cross_lang_roundtrip(
        "adversarial: identical records transpose+zstd rust->cpp",
        &records,
        |recs| {
            rust_write(
                recs,
                RustWriterOptions::new()
                    .compression(CompressionType::Zstd)
                    .transpose(true),
            )
        },
        cpp_read,
    );
}

#[test]
fn adversarial_transpose_identical_records_cpp_to_rust() {
    let record = vec![0xDEu8; 256];
    let records: Vec<Vec<u8>> = (0..200).map(|_| record.clone()).collect();
    cross_lang_roundtrip(
        "adversarial: identical records transpose+zstd cpp->rust",
        &records,
        |recs| {
            cpp_write(
                recs,
                FfiWriterOptions::new()
                    .compression(Compression::Zstd(3))
                    .transpose(true),
            )
        },
        rust_read,
    );
}

// ---------------------------------------------------------------------------
// Adversarial: high-entropy pseudo-random data (hard to compress)
// ---------------------------------------------------------------------------

#[test]
fn adversarial_transpose_high_entropy_rust_to_cpp() {
    // Use a simple LCG to generate pseudo-random bytes
    let mut seed: u64 = 0xDEADBEEFCAFE;
    let records: Vec<Vec<u8>> = (0..100)
        .map(|_| {
            (0..512)
                .map(|_| {
                    seed = seed.wrapping_mul(6364136223846793005).wrapping_add(1);
                    (seed >> 33) as u8
                })
                .collect()
        })
        .collect();
    cross_lang_roundtrip(
        "adversarial: high-entropy transpose+brotli rust->cpp",
        &records,
        |recs| {
            rust_write(
                recs,
                RustWriterOptions::new()
                    .compression(CompressionType::Brotli)
                    .transpose(true),
            )
        },
        cpp_read,
    );
}

#[test]
fn adversarial_transpose_high_entropy_cpp_to_rust() {
    let mut seed: u64 = 0xDEADBEEFCAFE;
    let records: Vec<Vec<u8>> = (0..100)
        .map(|_| {
            (0..512)
                .map(|_| {
                    seed = seed.wrapping_mul(6364136223846793005).wrapping_add(1);
                    (seed >> 33) as u8
                })
                .collect()
        })
        .collect();
    cross_lang_roundtrip(
        "adversarial: high-entropy transpose+brotli cpp->rust",
        &records,
        |recs| {
            cpp_write(
                recs,
                FfiWriterOptions::new()
                    .compression(Compression::Brotli(6))
                    .transpose(true),
            )
        },
        rust_read,
    );
}

// ---------------------------------------------------------------------------
// Adversarial: proto-like byte patterns that aren't valid protobuf
// ---------------------------------------------------------------------------

#[test]
fn adversarial_transpose_proto_like_bytes_rust_to_cpp() {
    // Records that start with valid-looking protobuf field tags but have
    // inconsistent wire types / lengths, stressing the transpose encoder's
    // opaque-blob path.
    let records: Vec<Vec<u8>> = (0..50)
        .map(|i| {
            let tag = ((i as u8 + 1) << 3) | 2; // length-delimited wire type
            let mut rec = vec![tag, 0xFF]; // impossible length
            rec.extend(vec![0xAA; 20]);
            rec
        })
        .collect();
    cross_lang_roundtrip(
        "adversarial: proto-like bytes transpose+none rust->cpp",
        &records,
        |recs| {
            rust_write(
                recs,
                RustWriterOptions::new()
                    .compression(CompressionType::None)
                    .transpose(true),
            )
        },
        cpp_read,
    );
}

#[test]
fn adversarial_transpose_proto_like_bytes_cpp_to_rust() {
    let records: Vec<Vec<u8>> = (0..50)
        .map(|i| {
            let tag = ((i as u8 + 1) << 3) | 2;
            let mut rec = vec![tag, 0xFF];
            rec.extend(vec![0xAA; 20]);
            rec
        })
        .collect();
    cross_lang_roundtrip(
        "adversarial: proto-like bytes transpose+none cpp->rust",
        &records,
        |recs| {
            cpp_write(
                recs,
                FfiWriterOptions::new()
                    .compression(Compression::None)
                    .transpose(true),
            )
        },
        rust_read,
    );
}

// ---------------------------------------------------------------------------
// Adversarial: very large single record through transpose
// ---------------------------------------------------------------------------

#[test]
fn adversarial_transpose_single_large_record_rust_to_cpp() {
    // 64 KiB record through transpose+zstd
    let records = vec![vec![0x42u8; 65536]];
    cross_lang_roundtrip(
        "adversarial: single 64KiB record transpose+zstd rust->cpp",
        &records,
        |recs| {
            rust_write(
                recs,
                RustWriterOptions::new()
                    .compression(CompressionType::Zstd)
                    .transpose(true),
            )
        },
        cpp_read,
    );
}

#[test]
fn adversarial_transpose_single_large_record_cpp_to_rust() {
    let records = vec![vec![0x42u8; 65536]];
    cross_lang_roundtrip(
        "adversarial: single 64KiB record transpose+zstd cpp->rust",
        &records,
        |recs| {
            cpp_write(
                recs,
                FfiWriterOptions::new()
                    .compression(Compression::Zstd(3))
                    .transpose(true),
            )
        },
        rust_read,
    );
}

// ---------------------------------------------------------------------------
// Adversarial: tiny chunk_size forcing ~1 record per chunk
// ---------------------------------------------------------------------------

#[test]
fn adversarial_transpose_one_record_per_chunk_rust_to_cpp() {
    // chunk_size=64 with records of ~32 bytes => roughly 1 record per chunk
    let records: Vec<Vec<u8>> = (0..100)
        .map(|i| format!("rec-{i:04}-padding-data-here").into_bytes())
        .collect();
    cross_lang_roundtrip(
        "adversarial: ~1 rec/chunk transpose+none rust->cpp",
        &records,
        |recs| {
            rust_write(
                recs,
                RustWriterOptions::new()
                    .compression(CompressionType::None)
                    .transpose(true)
                    .chunk_size(64),
            )
        },
        cpp_read,
    );
}

#[test]
fn adversarial_transpose_one_record_per_chunk_cpp_to_rust() {
    let records: Vec<Vec<u8>> = (0..100)
        .map(|i| format!("rec-{i:04}-padding-data-here").into_bytes())
        .collect();
    cross_lang_roundtrip(
        "adversarial: ~1 rec/chunk transpose+none cpp->rust",
        &records,
        |recs| {
            cpp_write(
                recs,
                FfiWriterOptions::new()
                    .compression(Compression::None)
                    .transpose(true)
                    .chunk_size(64),
            )
        },
        rust_read,
    );
}