stringex.c
3.11 KB
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
/*
clsync - file tree sync utility based on inotify/kqueue/bsm
Copyright (C) 2014 Dmitry Yu Okunev <dyokunev@ut.mephi.ru> 0x8E30679C
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h> // free()
#include <string.h> // strtok_r()
#include <errno.h> // errno
#include "malloc.h"
#include "error.h"
static int _str_splitargs(
char *ptr,
char **arg_start_p,
int quotes,
int (*handler)(char *, size_t, void *),
char *additional_arg
) {
char *arg_start, *arg;
size_t arg_len;
int rc;
arg_start = *arg_start_p;
*arg_start_p = &ptr[1];
arg_len = ptr - arg_start;
if (arg_len == 0) // Skipping nearby spaces
return 0;
arg = xmalloc(arg_len+1);
if (quotes) {
int s, d;
s = d = 0;
while (s < arg_len) {
if (arg_start[s])
arg[d++] = arg_start[s];
s++;
}
arg_len = d;
} else
memcpy(arg, arg_start, arg_len);
#ifdef _DEBUG
debug(15, "%p %p %i: <%s>", arg_start, ptr, arg_len, arg);
#endif
arg[arg_len] = 0;
if ((rc = handler(arg, arg_len, additional_arg))) {
free(arg);
return rc;
}
return 0;
}
int str_splitargs(
char *_instr,
int (*handler)(char *, size_t, void *),
void *arg
) {
debug(9, "");
char *arg_start, *ptr, *instr;
int quotes = 0;
instr = strdup(_instr);
ptr = instr;
arg_start = instr;
while (1) {
ptr = strpbrk(ptr, " \t\"\'");
#ifdef _DEBUG
debug(10, "ptr == %p", ptr);
#endif
if (ptr == NULL)
break;
#ifdef _DEBUG
debug(10, "*ptr == \"%c\" (%i)", *ptr, *ptr);
#endif
switch (*(ptr++)) {
case ' ':
case '\t': {
int rc;
if ((rc = _str_splitargs(&ptr[-1], &arg_start, quotes, handler, arg)))
return rc;
quotes = 0;
break;
}
case '"':
ptr[-1] = 0;
quotes++;
while ((ptr = strchr(ptr, '"')) != NULL) {
// Checking for escaping
char *p;
p = &ptr[-1];
while (*p == '\\') {
p--;
#ifdef PARANOID
if (p < instr)
critical("Dangerous internal error");
#endif
}
if ((ptr-p)%2)
break;
}
if (ptr == NULL) {
errno = EINVAL;
error("Unterminated quote <\"> in string: <%s>", instr);
return errno;
}
*ptr = 0;
quotes++;
ptr++;
break;
case '\'':
ptr[-1] = 0;
quotes++;
ptr = strchr(ptr, '\'');
if (ptr == NULL) {
errno = EINVAL;
error("Unterminated quote <'> in string: <%s>", instr);
return errno;
}
*ptr = 0;
quotes++;
ptr++;
break;
}
}
int rc = _str_splitargs(strchr(arg_start, 0), &arg_start, quotes, handler, arg);
free(instr);
return rc;
}