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1df872fd | 1 | /* Check two strings for equality. |
2b778ceb | 2 | Copyright (C) 2018-2021 Free Software Foundation, Inc. |
1df872fd FW |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
1df872fd FW |
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, const char *str, size_t length) | |
28 | { | |
29 | if (str == NULL) | |
30 | printf (" %s string: NULL\n", what); | |
31 | else | |
32 | printf (" %s string: %zu bytes\n", what, length); | |
33 | } | |
34 | ||
35 | static void | |
36 | report_string (const char *what, const unsigned char *blob, | |
37 | size_t length, const char *expr) | |
38 | { | |
39 | if (length > 0) | |
40 | { | |
41 | printf (" %s (evaluated from %s):\n", what, expr); | |
42 | char *quoted = support_quote_blob (blob, length); | |
43 | printf (" \"%s\"\n", quoted); | |
44 | free (quoted); | |
45 | ||
46 | fputs (" ", stdout); | |
47 | for (size_t i = 0; i < length; ++i) | |
48 | printf (" %02X", blob[i]); | |
49 | putc ('\n', stdout); | |
50 | } | |
51 | } | |
52 | ||
53 | static size_t | |
54 | string_length_or_zero (const char *str) | |
55 | { | |
56 | if (str == NULL) | |
57 | return 0; | |
58 | else | |
59 | return strlen (str); | |
60 | } | |
61 | ||
62 | void | |
63 | support_test_compare_string (const char *left, const char *right, | |
64 | const char *file, int line, | |
65 | const char *left_expr, const char *right_expr) | |
66 | { | |
67 | /* Two null pointers are accepted. */ | |
68 | if (left == NULL && right == NULL) | |
69 | return; | |
70 | ||
71 | size_t left_length = string_length_or_zero (left); | |
72 | size_t right_length = string_length_or_zero (right); | |
73 | ||
74 | if (left_length != right_length || left == NULL || right == NULL | |
75 | || memcmp (left, right, left_length) != 0) | |
76 | { | |
77 | support_record_failure (); | |
6175507c | 78 | printf ("%s:%d: error: string comparison failed\n", file, line); |
1df872fd | 79 | if (left_length == right_length && right != NULL && left != NULL) |
00c86a37 | 80 | printf (" string length: %zu bytes\n", left_length); |
1df872fd FW |
81 | else |
82 | { | |
83 | report_length ("left", left, left_length); | |
84 | report_length ("right", right, right_length); | |
85 | } | |
86 | report_string ("left", (const unsigned char *) left, | |
87 | left_length, left_expr); | |
88 | report_string ("right", (const unsigned char *) right, | |
89 | right_length, right_expr); | |
90 | } | |
91 | } |