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ASCII.hxx
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1 /*
2 * Copyright (C) 2013 Max Kellermann <max.kellermann@gmail.com>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the
14 * distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
20 * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27 * OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #ifndef ASCII_HXX
31 #define ASCII_HXX
32
33 #include "Compiler.h"
34
35 #include <assert.h>
36 #include <strings.h>
37
42 gcc_pure gcc_nonnull_all
43 static inline bool
44 StringEqualsCaseASCII(const char *a, const char *b)
45 {
46 #if !CLANG_CHECK_VERSION(3,6)
47 /* disabled on clang due to -Wtautological-pointer-compare */
48 assert(a != nullptr);
49 assert(b != nullptr);
50 #endif
51
52 /* note: strcasecmp() depends on the locale, but for ASCII-only
53 strings, it's safe to use */
54 return strcasecmp(a, b) == 0;
55 }
56
57 gcc_pure gcc_nonnull_all
58 static inline bool
59 StringEqualsCaseASCII(const char *a, const char *b, size_t n)
60 {
61 #if !CLANG_CHECK_VERSION(3,6)
62 /* disabled on clang due to -Wtautological-pointer-compare */
63 assert(a != nullptr);
64 assert(b != nullptr);
65 #endif
66
67 /* note: strcasecmp() depends on the locale, but for ASCII-only
68 strings, it's safe to use */
69 return strncasecmp(a, b, n) == 0;
70 }
71
72 #endif
gcc_nonnull_all
#define gcc_nonnull_all
Definition: Compiler.h:122
Compiler.h
StringEqualsCaseASCII
gcc_pure static gcc_nonnull_all bool StringEqualsCaseASCII(const char *a, const char *b)
Determine whether two strings are equal, ignoring case for ASCII letters.
Definition: ASCII.hxx:44
gcc_pure
#define gcc_pure
Definition: Compiler.h:116