blob: 58b69a020d6116ecec819861c5a62e77c7ffe299 (
plain)
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
|
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* Copyright (C) 2018 - David Oberhollenzer
*
* 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 <https://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "util.h"
char *strexpand(const char *inp, size_t argc, const char *const *argv)
{
char *out, *dst;
const char *ptr;
size_t i, len;
ptr = inp;
len = 0;
while (*ptr != '\0') {
if (ptr[0] == '%' && isdigit(ptr[1])) {
i = ptr[1] - '0';
if (i < argc)
len += strlen(argv[i]);
ptr += 2;
} else if (ptr[0] == '%' && ptr[1] == '%') {
ptr += 2;
len += 1;
} else {
++ptr;
++len;
}
}
out = calloc(1, len + 1);
if (out == NULL)
return NULL;
dst = out;
while (*inp != '\0') {
if (inp[0] == '%' && isdigit(inp[1])) {
i = inp[1] - '0';
if (i < argc) {
len = strlen(argv[i]);
memcpy(dst, argv[i], len);
dst += len;
}
inp += 2;
} else if (inp[0] == '%' && inp[1] == '%') {
*(dst++) = '%';
inp += 2;
} else {
*(dst++) = *(inp++);
}
}
return out;
}
|
