Contents of /tags/mkinitrd-6_3_0/busybox/libbb/compare_string_array.c
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Thu Aug 19 10:14:02 2010 UTC (14 years, 1 month ago) by niro
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File size: 2016 byte(s)
Thu Aug 19 10:14:02 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 2016 byte(s)
tagged 'mkinitrd-6_3_0'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
4 | */ |
5 | |
6 | #include "libbb.h" |
7 | |
8 | /* returns the array index of the string */ |
9 | /* (index of first match is returned, or -1) */ |
10 | int FAST_FUNC index_in_str_array(const char *const string_array[], const char *key) |
11 | { |
12 | int i; |
13 | |
14 | for (i = 0; string_array[i] != 0; i++) { |
15 | if (strcmp(string_array[i], key) == 0) { |
16 | return i; |
17 | } |
18 | } |
19 | return -1; |
20 | } |
21 | |
22 | int FAST_FUNC index_in_strings(const char *strings, const char *key) |
23 | { |
24 | int idx = 0; |
25 | |
26 | while (*strings) { |
27 | if (strcmp(strings, key) == 0) { |
28 | return idx; |
29 | } |
30 | strings += strlen(strings) + 1; /* skip NUL */ |
31 | idx++; |
32 | } |
33 | return -1; |
34 | } |
35 | |
36 | /* returns the array index of the string, even if it matches only a beginning */ |
37 | /* (index of first match is returned, or -1) */ |
38 | #ifdef UNUSED |
39 | int FAST_FUNC index_in_substr_array(const char *const string_array[], const char *key) |
40 | { |
41 | int i; |
42 | int len = strlen(key); |
43 | if (len) { |
44 | for (i = 0; string_array[i] != 0; i++) { |
45 | if (strncmp(string_array[i], key, len) == 0) { |
46 | return i; |
47 | } |
48 | } |
49 | } |
50 | return -1; |
51 | } |
52 | #endif |
53 | |
54 | int FAST_FUNC index_in_substrings(const char *strings, const char *key) |
55 | { |
56 | int matched_idx = -1; |
57 | const int len = strlen(key); |
58 | |
59 | if (len) { |
60 | int idx = 0; |
61 | while (*strings) { |
62 | if (strncmp(strings, key, len) == 0) { |
63 | if (strings[len] == '\0') |
64 | return idx; /* exact match */ |
65 | if (matched_idx >= 0) |
66 | return -1; /* ambiguous match */ |
67 | matched_idx = idx; |
68 | } |
69 | strings += strlen(strings) + 1; /* skip NUL */ |
70 | idx++; |
71 | } |
72 | } |
73 | return matched_idx; |
74 | } |
75 | |
76 | const char* FAST_FUNC nth_string(const char *strings, int n) |
77 | { |
78 | while (n) { |
79 | n--; |
80 | strings += strlen(strings) + 1; |
81 | } |
82 | return strings; |
83 | } |
84 | |
85 | #ifdef UNUSED_SO_FAR /* only brctl.c needs it yet */ |
86 | /* Returns 0 for no, 1 for yes or a negative value on error. */ |
87 | smallint FAST_FUNC yesno(const char *str) |
88 | { |
89 | static const char no_yes[] ALIGN1 = |
90 | "0\0" "off\0" "no\0" |
91 | "1\0" "on\0" "yes\0"; |
92 | int ret = index_in_substrings(no_yes, str); |
93 | return ret / 3; |
94 | } |
95 | #endif |