1 ac25a292 2018-01-26 stsp /*
  2 ac25a292 2018-01-26 stsp  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
  3 ac25a292 2018-01-26 stsp  *
  4 ac25a292 2018-01-26 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 ac25a292 2018-01-26 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 ac25a292 2018-01-26 stsp  * copyright notice and this permission notice appear in all copies.
  7 ac25a292 2018-01-26 stsp  *
  8 ac25a292 2018-01-26 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 ac25a292 2018-01-26 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 ac25a292 2018-01-26 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 ac25a292 2018-01-26 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 ac25a292 2018-01-26 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 ac25a292 2018-01-26 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 ac25a292 2018-01-26 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 ac25a292 2018-01-26 stsp  */
 16 ac25a292 2018-01-26 stsp 
 17 ac25a292 2018-01-26 stsp #include <sys/queue.h>
 18 ac25a292 2018-01-26 stsp 
 19 ac25a292 2018-01-26 stsp #include <stdio.h>
 20 ac25a292 2018-01-26 stsp #include <stdlib.h>
 21 885d3e02 2018-01-27 stsp #include <string.h>
 22 f8352b2a 2018-03-12 stsp #include <err.h>
 23 f8352b2a 2018-03-12 stsp #include <unistd.h>
 24 ac25a292 2018-01-26 stsp 
 25 ac25a292 2018-01-26 stsp #include "got_error.h"
 26 511a516b 2018-05-19 stsp #include "got_opentemp.h"
 27 ac25a292 2018-01-26 stsp 
 28 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
 29 718b3ab0 2018-03-17 stsp #include "got_lib_path.h"
 30 ac25a292 2018-01-26 stsp 
 31 885d3e02 2018-01-27 stsp #ifndef nitems
 32 885d3e02 2018-01-27 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
 33 885d3e02 2018-01-27 stsp #endif
 34 885d3e02 2018-01-27 stsp 
 35 885d3e02 2018-01-27 stsp struct delta_test {
 36 885d3e02 2018-01-27 stsp 	const char *base;
 37 885d3e02 2018-01-27 stsp 	const char *delta;
 38 885d3e02 2018-01-27 stsp 	size_t delta_len;
 39 885d3e02 2018-01-27 stsp 	const char *expected;
 40 885d3e02 2018-01-27 stsp } delta_tests[] = {
 41 885d3e02 2018-01-27 stsp 	/* base len 0, target len 4, append 4 'x' */
 42 885d3e02 2018-01-27 stsp 	{ "", "\x00\x04\x04xxxx", 7, "xxxx" },
 43 885d3e02 2018-01-27 stsp 	/* copy 4 bytes at offset 0 from base, append 4 'x' */
 44 885d3e02 2018-01-27 stsp 	{ "aabbccdd", "\x08\x08\x90\x04\x04xxxx", 9, "aabbxxxx" },
 45 885d3e02 2018-01-27 stsp 	/* copy 4 bytes at offset 4 from base, append 4 'x' */
 46 885d3e02 2018-01-27 stsp 	{ "aabbccdd", "\x08\x08\x91\x04\x04\x04xxxx", 10, "ccddxxxx" },
 47 885d3e02 2018-01-27 stsp };
 48 885d3e02 2018-01-27 stsp 
 49 ac25a292 2018-01-26 stsp static int
 50 6df54056 2018-03-03 stsp delta_apply()
 51 ac25a292 2018-01-26 stsp {
 52 885d3e02 2018-01-27 stsp 	const struct got_error *err = NULL;
 53 885d3e02 2018-01-27 stsp 	int i;
 54 885d3e02 2018-01-27 stsp 	FILE *result_file;
 55 885d3e02 2018-01-27 stsp 
 56 885d3e02 2018-01-27 stsp 	result_file = got_opentemp();
 57 885d3e02 2018-01-27 stsp 	if (result_file == NULL)
 58 885d3e02 2018-01-27 stsp 		return 1;
 59 885d3e02 2018-01-27 stsp 
 60 885d3e02 2018-01-27 stsp 	for (i = 0; i < nitems(delta_tests); i++) {
 61 885d3e02 2018-01-27 stsp 		struct delta_test *dt = &delta_tests[i];
 62 885d3e02 2018-01-27 stsp 		FILE *base_file;
 63 885d3e02 2018-01-27 stsp 		char buf[1024];
 64 885d3e02 2018-01-27 stsp 		size_t n, len, result_len;
 65 885d3e02 2018-01-27 stsp 
 66 885d3e02 2018-01-27 stsp 		len = strlen(dt->base);
 67 f8aea23e 2018-02-11 stsp 		base_file = got_opentemp();
 68 f8aea23e 2018-02-11 stsp 		if (base_file == NULL) {
 69 f8aea23e 2018-02-11 stsp 			err = got_error_from_errno();
 70 885d3e02 2018-01-27 stsp 			break;
 71 f8aea23e 2018-02-11 stsp 		}
 72 885d3e02 2018-01-27 stsp 
 73 f8aea23e 2018-02-11 stsp 		n = fwrite(dt->base, 1, len, base_file);
 74 f8aea23e 2018-02-11 stsp 		if (n != len) {
 75 f8aea23e 2018-02-11 stsp 			err = got_ferror(base_file, GOT_ERR_IO);
 76 f8aea23e 2018-02-11 stsp 			break;
 77 f8aea23e 2018-02-11 stsp 		}
 78 f8aea23e 2018-02-11 stsp 		rewind(base_file);
 79 f8aea23e 2018-02-11 stsp 
 80 885d3e02 2018-01-27 stsp 		err = got_delta_apply(base_file, dt->delta, dt->delta_len,
 81 b29656e2 2018-03-16 stsp 		    result_file, &len);
 82 885d3e02 2018-01-27 stsp 		fclose(base_file);
 83 885d3e02 2018-01-27 stsp 		if (err)
 84 885d3e02 2018-01-27 stsp 			break;
 85 885d3e02 2018-01-27 stsp 		result_len = strlen(dt->expected);
 86 b29656e2 2018-03-16 stsp 		if (result_len != len) {
 87 b29656e2 2018-03-16 stsp 			err = got_ferror(result_file, GOT_ERR_BAD_DELTA);
 88 b29656e2 2018-03-16 stsp 			break;
 89 b29656e2 2018-03-16 stsp 		}
 90 885d3e02 2018-01-27 stsp 		n = fread(buf, result_len, 1, result_file);
 91 885d3e02 2018-01-27 stsp 		if (n != 1 || strncmp(buf, dt->expected, result_len) != 0) {
 92 885d3e02 2018-01-27 stsp 			err = got_ferror(result_file, GOT_ERR_BAD_DELTA);
 93 885d3e02 2018-01-27 stsp 			break;
 94 885d3e02 2018-01-27 stsp 		}
 95 885d3e02 2018-01-27 stsp 		rewind(result_file);
 96 885d3e02 2018-01-27 stsp 	}
 97 885d3e02 2018-01-27 stsp 
 98 885d3e02 2018-01-27 stsp 	fclose(result_file);
 99 885d3e02 2018-01-27 stsp 	return (err == NULL);
100 ac25a292 2018-01-26 stsp }
101 ac25a292 2018-01-26 stsp 
102 b08fe7be 2018-01-26 stsp #define RUN_TEST(expr, name) \
103 b08fe7be 2018-01-26 stsp 	{ test_ok = (expr);  \
104 b08fe7be 2018-01-26 stsp 	printf("test %s %s\n", (name), test_ok ? "ok" : "failed"); \
105 b08fe7be 2018-01-26 stsp 	failure = (failure || !test_ok); }
106 b08fe7be 2018-01-26 stsp 
107 ac25a292 2018-01-26 stsp int
108 ac25a292 2018-01-26 stsp main(int argc, const char *argv[])
109 ac25a292 2018-01-26 stsp {
110 b08fe7be 2018-01-26 stsp 	int test_ok;
111 ac25a292 2018-01-26 stsp 	int failure = 0;
112 ac25a292 2018-01-26 stsp 
113 ac25a292 2018-01-26 stsp 	if (argc != 1) {
114 ac25a292 2018-01-26 stsp 		fprintf(stderr, "usage: delta_test [REPO_PATH]\n");
115 ac25a292 2018-01-26 stsp 		return 1;
116 ac25a292 2018-01-26 stsp 	}
117 ac25a292 2018-01-26 stsp 
118 f8352b2a 2018-03-12 stsp 	if (pledge("stdio rpath wpath cpath", NULL) == -1)
119 f8352b2a 2018-03-12 stsp 		err(1, "pledge");
120 f8352b2a 2018-03-12 stsp 
121 6df54056 2018-03-03 stsp 	RUN_TEST(delta_apply(), "delta_apply");
122 ac25a292 2018-01-26 stsp 
123 ac25a292 2018-01-26 stsp 	return failure ? 1 : 0;
124 ac25a292 2018-01-26 stsp }