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Commit | Line | Data |
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60918275 LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
3 | #include <assert.h> | |
4 | #include <stdlib.h> | |
5 | #include <stdarg.h> | |
6 | #include <string.h> | |
7 | ||
8 | #include "util.h" | |
9 | #include "strv.h" | |
10 | ||
11 | char *strv_find(char **l, const char *name) { | |
12 | assert(l); | |
13 | assert(name); | |
14 | ||
15 | for (; *l; l++) | |
16 | if (streq(*l, name)) | |
17 | return *l; | |
18 | ||
19 | return NULL; | |
20 | } | |
21 | ||
22 | void strv_free(char **l) { | |
23 | char **k; | |
24 | ||
25 | if (!l) | |
26 | return; | |
27 | ||
28 | for (k = l; *k; k++) | |
29 | free(*k); | |
30 | ||
31 | free(l); | |
32 | } | |
33 | ||
34 | char **strv_copy(char **l) { | |
35 | char **r, **k; | |
36 | ||
37 | if (!(r = new(char*, strv_length(l)+1))) | |
38 | return NULL; | |
39 | ||
40 | for (k = r; *l; k++, l++) | |
41 | if (!(*k = strdup(*l))) | |
42 | goto fail; | |
43 | ||
44 | *k = NULL; | |
45 | return r; | |
46 | ||
47 | fail: | |
48 | for (k--, l--; k >= r; k--, l--) | |
49 | free(*k); | |
50 | ||
51 | return NULL; | |
52 | } | |
53 | ||
54 | unsigned strv_length(char **l) { | |
55 | unsigned n = 0; | |
56 | ||
57 | if (!l) | |
58 | return 0; | |
59 | ||
60 | for (; *l; l++) | |
61 | n++; | |
62 | ||
63 | return n; | |
64 | } | |
65 | ||
66 | char **strv_new(const char *x, ...) { | |
67 | const char *s; | |
68 | char **a; | |
69 | unsigned n = 0, i = 0; | |
70 | va_list ap; | |
71 | ||
72 | if (x) { | |
73 | n = 1; | |
74 | ||
75 | va_start(ap, x); | |
76 | ||
77 | while (va_arg(ap, const char*)) | |
78 | n++; | |
79 | ||
80 | va_end(ap); | |
81 | } | |
82 | ||
83 | if (!(a = new(char*, n+1))) | |
84 | return NULL; | |
85 | ||
86 | if (x) { | |
87 | if (!(a[i] = strdup(x))) { | |
88 | free(a); | |
89 | return NULL; | |
90 | } | |
91 | ||
92 | i++; | |
93 | ||
94 | va_start(ap, x); | |
95 | ||
96 | while ((s = va_arg(ap, const char*))) { | |
97 | if (!(a[i] = strdup(s))) | |
98 | goto fail; | |
99 | ||
100 | i++; | |
101 | } | |
102 | ||
103 | va_end(ap); | |
104 | } | |
105 | ||
106 | a[i] = NULL; | |
107 | return a; | |
108 | ||
109 | fail: | |
110 | ||
111 | for (; i > 0; i--) | |
112 | if (a[i-1]) | |
113 | free(a[i-1]); | |
114 | ||
115 | free(a); | |
116 | return NULL; | |
117 | } | |
034c6ed7 LP |
118 | |
119 | char **strv_merge(char **a, char **b) { | |
120 | char **r, **k; | |
121 | ||
122 | if (!a) | |
123 | return strv_copy(b); | |
124 | ||
125 | if (!b) | |
126 | return strv_copy(a); | |
127 | ||
128 | if (!(r = new(char*, strv_length(a)+strv_length(b)+1))) | |
129 | return NULL; | |
130 | ||
131 | for (k = r; *a; k++, a++) | |
132 | if (!(*k = strdup(*a))) | |
133 | goto fail; | |
134 | for (; *b; k++, b++) | |
135 | if (!(*k = strdup(*b))) | |
136 | goto fail; | |
137 | ||
138 | *k = NULL; | |
139 | return r; | |
140 | ||
141 | fail: | |
142 | for (k--; k >= r; k--) | |
143 | free(*k); | |
144 | ||
145 | return NULL; | |
146 | ||
147 | } |