1 | /* Check two binary blobs for equality. |
2 | Copyright (C) 2018-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <stdio.h> |
20 | #include <stdlib.h> |
21 | #include <string.h> |
22 | #include <support/check.h> |
23 | #include <support/support.h> |
24 | #include <support/xmemstream.h> |
25 | |
26 | static void |
27 | report_length (const char *what, unsigned long int length, const char *expr) |
28 | { |
29 | printf (format: " %s %lu bytes (from %s)\n" , what, length, expr); |
30 | } |
31 | |
32 | static void |
33 | report_blob (const char *what, const unsigned char *blob, |
34 | unsigned long int length, const char *expr) |
35 | { |
36 | if (blob == NULL && length > 0) |
37 | printf (format: " %s (evaluated from %s): NULL\n" , what, expr); |
38 | else if (length > 0) |
39 | { |
40 | printf (format: " %s (evaluated from %s):\n" , what, expr); |
41 | char *quoted = support_quote_blob (blob, length); |
42 | printf (format: " \"%s\"\n" , quoted); |
43 | free (ptr: quoted); |
44 | |
45 | fputs (s: " " , stdout); |
46 | for (unsigned long i = 0; i < length; ++i) |
47 | printf (format: " %02X" , blob[i]); |
48 | putc (c: '\n', stdout); |
49 | } |
50 | } |
51 | |
52 | void |
53 | support_test_compare_blob (const void *left, unsigned long int left_length, |
54 | const void *right, unsigned long int right_length, |
55 | const char *file, int line, |
56 | const char *left_expr, const char *left_len_expr, |
57 | const char *right_expr, const char *right_len_expr) |
58 | { |
59 | /* No differences are possible if both lengths are null. */ |
60 | if (left_length == 0 && right_length == 0) |
61 | return; |
62 | |
63 | if (left_length != right_length || left == NULL || right == NULL |
64 | || memcmp (s1: left, s2: right, n: left_length) != 0) |
65 | { |
66 | support_record_failure (); |
67 | printf (format: "%s:%d: error: blob comparison failed\n" , file, line); |
68 | if (left_length == right_length) |
69 | printf (format: " blob length: %lu bytes\n" , left_length); |
70 | else |
71 | { |
72 | report_length (what: "left length: " , length: left_length, expr: left_len_expr); |
73 | report_length (what: "right length:" , length: right_length, expr: right_len_expr); |
74 | } |
75 | report_blob (what: "left" , blob: left, length: left_length, expr: left_expr); |
76 | report_blob (what: "right" , blob: right, length: right_length, expr: right_expr); |
77 | } |
78 | } |
79 | |