libsidplayfp  2.11.0
stringutils.h
1 /*
2  * This file is part of libsidplayfp, a SID player engine.
3  *
4  * Copyright 2013-2023 Leandro Nini
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef STRINGUTILS_H
22 #define STRINGUTILS_H
23 
24 #ifdef HAVE_CONFIG_H
25 # include "config.h"
26 #endif
27 
28 #if defined(_WIN32)
29 # include <string.h>
30 #elif defined(HAVE_STRCASECMP) || defined (HAVE_STRNCASECMP)
31 # include <strings.h>
32 #endif
33 
34 #include <cctype>
35 #include <algorithm>
36 #include <string>
37 
38 
39 namespace stringutils
40 {
44  inline bool casecompare(char c1, char c2) { return (tolower(c1) == tolower(c2)); }
45 
51  inline bool equal(const std::string& s1, const std::string& s2)
52  {
53  return s1.size() == s2.size()
54  && std::equal(s1.begin(), s1.end(), s2.begin(), casecompare);
55  }
56 
62  inline bool equal(const char* s1, const char* s2)
63  {
64 #if defined(_WIN32)
65  return _stricmp(s1, s2) == 0;
66 #elif defined(HAVE_STRCASECMP)
67  return strcasecmp(s1, s2) == 0;
68 #else
69  if (s1 == s2)
70  return true;
71 
72  if (s1 == 0 || s2 == 0)
73  return false;
74 
75  while ((*s1 != '\0') || (*s2 != '\0'))
76  {
77  if (!casecompare(*s1, *s2))
78  return false;
79  ++s1;
80  ++s2;
81  }
82 
83  return true;
84 #endif
85  }
86 
92  inline bool equal(const char* s1, const char* s2, size_t n)
93  {
94 #if defined(_WIN32)
95  return _strnicmp(s1, s2, n) == 0;
96 #elif defined(HAVE_STRNCASECMP)
97  return strncasecmp(s1, s2, n) == 0;
98 #else
99  if (s1 == s2 || n == 0)
100  return true;
101 
102  if (s1 == 0 || s2 == 0)
103  return false;
104 
105  while (n-- && ((*s1 != '\0') || (*s2 != '\0')))
106  {
107  if (!casecompare(*s1, *s2))
108  return false;
109  ++s1;
110  ++s2;
111  }
112 
113  return true;
114 #endif
115  }
116 }
117 
118 #endif