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de82cb0d | 1 | /* Check two strings for equality. |
581c785b | 2 | Copyright (C) 2018-2022 Free Software Foundation, Inc. |
de82cb0d JM |
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 <wchar.h> | |
23 | #include <support/check.h> | |
24 | #include <support/support.h> | |
25 | #include <support/xmemstream.h> | |
26 | ||
27 | static void | |
28 | report_length (const char *what, const CHAR *str, size_t length) | |
29 | { | |
30 | if (str == NULL) | |
31 | printf (" %s string: NULL\n", what); | |
32 | else | |
33 | printf (" %s string: %zu %s\n", what, length, | |
34 | WIDE ? "wide characters" : "bytes"); | |
35 | } | |
36 | ||
37 | static void | |
38 | report_string (const char *what, const UCHAR *blob, | |
39 | size_t length, const char *expr) | |
40 | { | |
41 | if (length > 0) | |
42 | { | |
43 | printf (" %s (evaluated from %s):\n", what, expr); | |
44 | char *quoted = SUPPORT_QUOTE_BLOB (blob, length); | |
45 | printf (" %s\"%s\"\n", LPREFIX, quoted); | |
46 | free (quoted); | |
47 | ||
48 | fputs (" ", stdout); | |
49 | for (size_t i = 0; i < length; ++i) | |
50 | printf (" %02X", (unsigned int) blob[i]); | |
51 | putc ('\n', stdout); | |
52 | } | |
53 | } | |
54 | ||
55 | static size_t | |
56 | string_length_or_zero (const CHAR *str) | |
57 | { | |
58 | if (str == NULL) | |
59 | return 0; | |
60 | else | |
61 | return STRLEN (str); | |
62 | } | |
63 | ||
64 | void | |
65 | SUPPORT_TEST_COMPARE_STRING (const CHAR *left, const CHAR *right, | |
66 | const char *file, int line, | |
67 | const char *left_expr, const char *right_expr) | |
68 | { | |
69 | /* Two null pointers are accepted. */ | |
70 | if (left == NULL && right == NULL) | |
71 | return; | |
72 | ||
73 | size_t left_length = string_length_or_zero (left); | |
74 | size_t right_length = string_length_or_zero (right); | |
75 | ||
76 | if (left_length != right_length || left == NULL || right == NULL | |
77 | || MEMCMP (left, right, left_length) != 0) | |
78 | { | |
79 | support_record_failure (); | |
80 | printf ("%s:%d: error: string comparison failed\n", file, line); | |
81 | if (left_length == right_length && right != NULL && left != NULL) | |
82 | printf (" string length: %zu %s\n", left_length, | |
83 | WIDE ? "wide characters" : "bytes"); | |
84 | else | |
85 | { | |
86 | report_length ("left", left, left_length); | |
87 | report_length ("right", right, right_length); | |
88 | } | |
89 | report_string ("left", (const UCHAR *) left, | |
90 | left_length, left_expr); | |
91 | report_string ("right", (const UCHAR *) right, | |
92 | right_length, right_expr); | |
93 | } | |
94 | } |