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
|
/**************************************************************************
*
* Copyright 2008 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* @file
* Platform independent functions for string manipulation.
*
* @author Jose Fonseca <jfonseca@vmware.com>
*/
#ifndef U_STRING_H_
#define U_STRING_H_
#if !defined(XF86_LIBC_H)
#include <stdio.h>
#endif
#include <stddef.h>
#include <stdarg.h>
#include "pipe/p_compiler.h"
#include "util/macros.h" // PRINTFLIKE
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _GNU_SOURCE
#define util_strchrnul strchrnul
#else
static inline char *
util_strchrnul(const char *s, char c)
{
for (; *s && *s != c; ++s);
return (char *)s;
}
#endif
#ifdef _WIN32
static inline int
util_vsnprintf(char *str, size_t size, const char *format, va_list ap)
{
/* We need to use _vscprintf to calculate the length as vsnprintf returns -1
* if the number of characters to write is greater than count.
*/
va_list ap_copy;
int ret;
va_copy(ap_copy, ap);
ret = _vsnprintf(str, size, format, ap);
if (ret < 0) {
ret = _vscprintf(format, ap_copy);
}
return ret;
}
static inline int
PRINTFLIKE(3, 4)
util_snprintf(char *str, size_t size, const char *format, ...)
{
va_list ap;
int ret;
va_start(ap, format);
ret = util_vsnprintf(str, size, format, ap);
va_end(ap);
return ret;
}
static inline void
util_vsprintf(char *str, const char *format, va_list ap)
{
util_vsnprintf(str, (size_t)-1, format, ap);
}
static inline void
PRINTFLIKE(2, 3)
util_sprintf(char *str, const char *format, ...)
{
va_list ap;
va_start(ap, format);
util_vsnprintf(str, (size_t)-1, format, ap);
va_end(ap);
}
static inline char *
util_strchr(const char *s, char c)
{
char *p = util_strchrnul(s, c);
return *p ? p : NULL;
}
static inline char*
util_strncat(char *dst, const char *src, size_t n)
{
char *p = dst + strlen(dst);
const char *q = src;
size_t i;
for (i = 0; i < n && *q != '\0'; ++i)
*p++ = *q++;
*p = '\0';
return dst;
}
static inline int
util_strcmp(const char *s1, const char *s2)
{
unsigned char u1, u2;
while (1) {
u1 = (unsigned char) *s1++;
u2 = (unsigned char) *s2++;
if (u1 != u2)
return u1 - u2;
if (u1 == '\0')
return 0;
}
return 0;
}
static inline int
util_strncmp(const char *s1, const char *s2, size_t n)
{
unsigned char u1, u2;
while (n-- > 0) {
u1 = (unsigned char) *s1++;
u2 = (unsigned char) *s2++;
if (u1 != u2)
return u1 - u2;
if (u1 == '\0')
return 0;
}
return 0;
}
static inline char *
util_strstr(const char *haystack, const char *needle)
{
const char *p = haystack;
size_t len = strlen(needle);
for (; (p = util_strchr(p, *needle)) != 0; p++) {
if (util_strncmp(p, needle, len) == 0) {
return (char *)p;
}
}
return NULL;
}
static inline void *
util_memmove(void *dest, const void *src, size_t n)
{
char *p = (char *)dest;
const char *q = (const char *)src;
if (dest < src) {
while (n--)
*p++ = *q++;
}
else
{
p += n;
q += n;
while (n--)
*--p = *--q;
}
return dest;
}
#else
#define util_vsnprintf vsnprintf
#define util_snprintf snprintf
#define util_vsprintf vsprintf
#define util_sprintf sprintf
#define util_strchr strchr
#define util_strcmp strcmp
#define util_strncmp strncmp
#define util_strncat strncat
#define util_strstr strstr
#define util_memmove memmove
#endif
/**
* Printable string buffer
*/
struct util_strbuf
{
char *str;
char *ptr;
size_t left;
};
static inline void
util_strbuf_init(struct util_strbuf *sbuf, char *str, size_t size)
{
sbuf->str = str;
sbuf->str[0] = 0;
sbuf->ptr = sbuf->str;
sbuf->left = size;
}
static inline void
util_strbuf_printf(struct util_strbuf *sbuf, const char *format, ...)
{
if(sbuf->left > 1) {
size_t written;
va_list ap;
va_start(ap, format);
written = util_vsnprintf(sbuf->ptr, sbuf->left, format, ap);
va_end(ap);
sbuf->ptr += written;
sbuf->left -= written;
}
}
#ifdef __cplusplus
}
#endif
#endif /* U_STRING_H_ */
|
