1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
/*
* libjingle
* Copyright 2004--2005, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __STRINGUTILS_H__
#define __STRINGUTILS_H__
#include <cctype>
#include <cstdarg>
#include <cstdio>
#ifdef WIN32
#include <wchar.h>
#endif // WIN32
#include <string>
///////////////////////////////////////////////////////////////////////////////
// Rename a bunch of common string functions so they are consistent across
// platforms and between char and wchar_t variants.
// Here is the full list of functions that are unified:
// strlen, strcmp, stricmp, strncmp, strnicmp
// strchr, vsnprintf, strtoul, tolowercase
// tolowercase is like tolower, but not compatible with end-of-file value
// Note that the wchar_t versions are not available on Linux
///////////////////////////////////////////////////////////////////////////////
inline char tolowercase(char c) {
return static_cast<char>(tolower(c));
}
#ifdef WIN32
inline size_t strlen(const wchar_t* s) {
return wcslen(s);
}
inline int strcmp(const wchar_t* s1, const wchar_t* s2) {
return wcscmp(s1, s2);
}
inline int stricmp(const wchar_t* s1, const wchar_t* s2) {
return wcsicmp(s1, s2);
}
inline int strncmp(const wchar_t* s1, const wchar_t* s2, size_t n) {
return wcsncmp(s1, s2, n);
}
inline int strnicmp(const wchar_t* s1, const wchar_t* s2, size_t n) {
return wcsnicmp(s1, s2, n);
}
inline const wchar_t* strchr(const wchar_t* s, wchar_t c) {
return wcschr(s, c);
}
inline int vsnprintf(char* buf, size_t n, const char* fmt, va_list args) {
return _vsnprintf(buf, n, fmt, args);
}
inline int vsnprintf(wchar_t* buf, size_t n, const wchar_t* fmt, va_list args) {
return _vsnwprintf(buf, n, fmt, args);
}
inline unsigned long strtoul(const wchar_t* snum, wchar_t** end, int base) {
return wcstoul(snum, end, base);
}
inline wchar_t tolowercase(wchar_t c) {
return static_cast<wchar_t>(towlower(c));
}
#endif // WIN32
#ifdef POSIX
inline int stricmp(const char* s1, const char* s2) {
return strcasecmp(s1, s2);
}
inline int strnicmp(const char* s1, const char* s2, size_t n) {
return strncasecmp(s1, s2, n);
}
#endif // POSIX
///////////////////////////////////////////////////////////////////////////////
// Traits simplifies porting string functions to be CTYPE-agnostic
///////////////////////////////////////////////////////////////////////////////
namespace cricket {
const size_t SIZE_UNKNOWN = static_cast<size_t>(-1);
template<class CTYPE>
struct Traits {
// STL string type
//typedef XXX string;
// Null-terminated string
//inline static const CTYPE* empty_str();
};
///////////////////////////////////////////////////////////////////////////////
// String utilities which work with char or wchar_t
///////////////////////////////////////////////////////////////////////////////
template<class CTYPE>
inline const CTYPE* nonnull(const CTYPE* str, const CTYPE* def_str = NULL) {
return str ? str : (def_str ? def_str : Traits<CTYPE>::empty_str());
}
template<class CTYPE>
const CTYPE* strchr(const CTYPE* str, const CTYPE* chs) {
for (size_t i=0; str[i]; ++i) {
for (size_t j=0; chs[j]; ++j) {
if (str[i] == chs[j]) {
return str + i;
}
}
}
return 0;
}
template<class CTYPE>
const CTYPE* strchrn(const CTYPE* str, size_t slen, CTYPE ch) {
for (size_t i=0; i<slen && str[i]; ++i) {
if (str[i] == ch) {
return str + i;
}
}
return 0;
}
template<class CTYPE>
size_t strlenn(const CTYPE* buffer, size_t buflen) {
size_t bufpos = 0;
while (buffer[bufpos] && (bufpos < buflen)) {
++bufpos;
}
return bufpos;
}
template<class CTYPE>
size_t strcpyn(CTYPE* buffer, size_t buflen,
const CTYPE* source, size_t srclen = SIZE_UNKNOWN) {
if (buflen <= 0)
return 0;
if (srclen == SIZE_UNKNOWN) {
srclen = strlenn(source, buflen - 1);
} else if (srclen >= buflen) {
srclen = buflen - 1;
}
memcpy(buffer, source, srclen * sizeof(CTYPE));
buffer[srclen] = 0;
return srclen;
}
// Safe versions of snprintf and vsnprintf that always null-terminate
template<class CTYPE>
size_t sprintfn(CTYPE* buffer, size_t buflen, const CTYPE* format, ...) {
va_list args;
va_start(args, format);
size_t len = vsprintfn(buffer, buflen, format, args);
va_end(args);
return len;
}
template<class CTYPE>
size_t vsprintfn(CTYPE* buffer, size_t buflen, const CTYPE* format,
va_list args) {
int len = vsnprintf(buffer, buflen, format, args);
if ((len < 0) || (static_cast<size_t>(len) >= buflen)) {
len = static_cast<int>(buflen - 1);
buffer[len] = 0;
}
return len;
}
///////////////////////////////////////////////////////////////////////////////
// Allow safe comparing and copying ascii (not UTF-8) with both wide and
// non-wide character strings.
///////////////////////////////////////////////////////////////////////////////
inline int asccmp(const char* s1, const char* s2) {
return strcmp(s1, s2);
}
inline int ascicmp(const char* s1, const char* s2) {
return stricmp(s1, s2);
}
inline int ascncmp(const char* s1, const char* s2, size_t n) {
return strncmp(s1, s2, n);
}
inline int ascnicmp(const char* s1, const char* s2, size_t n) {
return strnicmp(s1, s2, n);
}
inline size_t asccpyn(char* buffer, size_t buflen,
const char* source, size_t srclen = SIZE_UNKNOWN) {
return strcpyn(buffer, buflen, source, srclen);
}
#ifdef WIN32
typedef wchar_t(*CharacterTransformation)(wchar_t);
inline wchar_t identity(wchar_t c) { return c; }
int ascii_string_compare(const wchar_t* s1, const char* s2, size_t n,
CharacterTransformation transformation);
inline int asccmp(const wchar_t* s1, const char* s2) {
return ascii_string_compare(s1, s2, static_cast<size_t>(-1), identity);
}
inline int ascicmp(const wchar_t* s1, const char* s2) {
return ascii_string_compare(s1, s2, static_cast<size_t>(-1), tolowercase);
}
inline int ascncmp(const wchar_t* s1, const char* s2, size_t n) {
return ascii_string_compare(s1, s2, n, identity);
}
inline int ascnicmp(const wchar_t* s1, const char* s2, size_t n) {
return ascii_string_compare(s1, s2, n, tolowercase);
}
size_t asccpyn(wchar_t* buffer, size_t buflen,
const char* source, size_t srclen = SIZE_UNKNOWN);
#endif // WIN32
///////////////////////////////////////////////////////////////////////////////
// Traits<char> specializations
///////////////////////////////////////////////////////////////////////////////
template<>
struct Traits<char> {
typedef std::string string;
inline static const char* empty_str() { return ""; }
};
///////////////////////////////////////////////////////////////////////////////
// Traits<wchar_t> specializations (Windows only, currently)
///////////////////////////////////////////////////////////////////////////////
#ifdef WIN32
template<>
struct Traits<wchar_t> {
typedef std::wstring string;
inline static const wchar_t* Traits<wchar_t>::empty_str() { return L""; }
};
#endif // WIN32
} // namespace cricket
#endif // __STRINGUTILS_H__
|
