1 /*
2  * Copyright (c) 2021 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <string.h>
20 #include <err.h>
21 #include <unistd.h>
22 #include <getopt.h>
23 
24 #include "got_error.h"
25 #include "got_opentemp.h"
26 
27 #include "got_lib_deltify.h"
28 
29 #ifndef nitems
30 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
31 #endif
32 
33 static int
34 deltify_abc_axc(void)
35 {
36 	const struct got_error *err = NULL;
37 	size_t i;
38 	FILE *base_file, *derived_file, *result_file;
39 	struct got_delta_table *dt;
40 	struct got_delta_instruction *deltas;
41 	int ndeltas;
42 	int have_nblocks = 0;
43 
44 	base_file = got_opentemp();
45 	if (base_file == NULL)
46 		return 1;
47 
48 	derived_file = got_opentemp();
49 	if (derived_file == NULL)
50 		return 1;
51 
52 	result_file = got_opentemp();
53 	if (result_file == NULL)
54 		return 1;
55 
56 	for (i = 0; i < GOT_DELTIFY_MAXCHUNK; i++) {
57 		fputc('a', base_file);
58 		fputc('a', derived_file);
59 	}
60 	for (i = 0; i < GOT_DELTIFY_MAXCHUNK; i++) {
61 		fputc('b', base_file);
62 		fputc('x', derived_file);
63 	}
64 	for (i = 0; i < GOT_DELTIFY_MAXCHUNK; i++) {
65 		fputc('c', base_file);
66 		fputc('c', derived_file);
67 	}
68 
69 	rewind(base_file);
70 	rewind(derived_file);
71 
72 	err = got_deltify_init(&dt, base_file, 0, 3 * GOT_DELTIFY_MAXCHUNK);
73 	if (err)
74 		goto done;
75 
76 	for (i = 0; i < dt->nalloc; i++) {
77 		if (dt->blocks[i].len > 0)
78 			have_nblocks++;
79 	}
80 	if (have_nblocks != dt->nblocks) {
81 		err = got_error(GOT_ERR_BAD_DELTA);
82 		goto done;
83 	}
84 
85 	err = got_deltify(&deltas, &ndeltas, derived_file, 0,
86 	    3 * GOT_DELTIFY_MAXCHUNK, dt, base_file, 0,
87 	    3 * GOT_DELTIFY_MAXCHUNK);
88 	if (err)
89 		goto done;
90 
91 	if (ndeltas != 3) {
92 		err = got_error(GOT_ERR_BAD_DELTA);
93 		goto done;
94 	}
95 	/* Copy 'aaaa...' from base file. */
96 	if (!(deltas[0].copy == 1 && deltas[0].offset == 0 &&
97 	    deltas[0].len == GOT_DELTIFY_MAXCHUNK)) {
98 		err = got_error(GOT_ERR_BAD_DELTA);
99 		goto done;
100 	}
101 	/* Copy 'xxxx...' from derived file. */
102 	if (!(deltas[1].copy == 0 && deltas[1].offset == GOT_DELTIFY_MAXCHUNK &&
103 	    deltas[1].len == GOT_DELTIFY_MAXCHUNK)) {
104 		err = got_error(GOT_ERR_BAD_DELTA);
105 		goto done;
106 	}
107 	/* Copy 'ccccc...' from base file. */
108 	if (!(deltas[2].copy == 1 &&
109 	    deltas[2].offset == 2 * GOT_DELTIFY_MAXCHUNK &&
110 	    deltas[2].len == GOT_DELTIFY_MAXCHUNK)) {
111 		err = got_error(GOT_ERR_BAD_DELTA);
112 		goto done;
113 	}
114 
115 done:
116 	got_deltify_free(dt);
117 	fclose(base_file);
118 	fclose(derived_file);
119 	fclose(result_file);
120 	return (err == NULL);
121 }
122 
123 static int quiet;
124 
125 #define RUN_TEST(expr, name) \
126 	{ test_ok = (expr);  \
127 	if (!quiet) printf("test_%s %s\n", (name), test_ok ? "ok" : "failed"); \
128 	failure = (failure || !test_ok); }
129 
130 static void
131 usage(void)
132 {
133 	fprintf(stderr, "usage: delta_test [-q]\n");
134 }
135 
136 int
137 main(int argc, char *argv[])
138 {
139 	int test_ok;
140 	int failure = 0;
141 	int ch;
142 
143 	while ((ch = getopt(argc, argv, "q")) != -1) {
144 		switch (ch) {
145 		case 'q':
146 			quiet = 1;
147 			break;
148 		default:
149 			usage();
150 			return 1;
151 		}
152 	}
153 
154 	argc -= optind;
155 	argv += optind;
156 
157 	if (argc != 0) {
158 		usage();
159 		return 1;
160 	}
161 
162 #ifndef PROFILE
163 	if (pledge("stdio rpath wpath cpath unveil", NULL) == -1)
164 		err(1, "pledge");
165 #endif
166 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
167 		err(1, "unveil");
168 
169 	if (unveil(NULL, NULL) != 0)
170 		err(1, "unveil");
171 
172 	RUN_TEST(deltify_abc_axc(), "deltify_abc_axc");
173 
174 	return failure ? 1 : 0;
175 }