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3719602c PC |
1 | /* Copyright (C) 2010-2020 The RetroArch team |
2 | * | |
3 | * --------------------------------------------------------------------------------------- | |
4 | * The following license statement only applies to this file (compat_fnmatch.c). | |
5 | * --------------------------------------------------------------------------------------- | |
6 | * | |
7 | * Permission is hereby granted, free of charge, | |
8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation the rights to | |
10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, | |
11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include <stddef.h> | |
24 | ||
25 | #include <compat/fnmatch.h> | |
26 | ||
27 | /* Implemnentation of fnmatch(3) so it can be | |
28 | * distributed to non *nix platforms. | |
29 | * | |
30 | * No flags are implemented ATM. | |
31 | * We don't use them. Add flags as needed. */ | |
32 | ||
33 | int rl_fnmatch(const char *pattern, const char *string, int flags) | |
34 | { | |
35 | int rv; | |
36 | const char *c = NULL; | |
37 | int charmatch = 0; | |
38 | ||
39 | for (c = pattern; *c != '\0'; c++) | |
40 | { | |
41 | /* String ended before pattern */ | |
42 | if ((*c != '*') && (*string == '\0')) | |
43 | return FNM_NOMATCH; | |
44 | ||
45 | switch (*c) | |
46 | { | |
47 | /* Match any number of unknown chars */ | |
48 | case '*': | |
49 | /* Find next node in the pattern | |
50 | * ignoring multiple asterixes | |
51 | */ | |
52 | do { | |
53 | c++; | |
54 | if (*c == '\0') | |
55 | return 0; | |
56 | } while (*c == '*'); | |
57 | ||
58 | /* Match the remaining pattern | |
59 | * ignoring more and more characters. */ | |
60 | do { | |
61 | /* We reached the end of the string without a | |
62 | * match. There is a way to optimize this by | |
63 | * calculating the minimum chars needed to | |
64 | * match the remaining pattern but I don't | |
65 | * think it is worth the work ATM. | |
66 | */ | |
67 | if (*string == '\0') | |
68 | return FNM_NOMATCH; | |
69 | ||
70 | rv = rl_fnmatch(c, string, flags); | |
71 | string++; | |
72 | } while (rv != 0); | |
73 | ||
74 | return 0; | |
75 | /* Match char from list */ | |
76 | case '[': | |
77 | charmatch = 0; | |
78 | for (c++; *c != ']'; c++) | |
79 | { | |
80 | /* Bad format */ | |
81 | if (*c == '\0') | |
82 | return FNM_NOMATCH; | |
83 | ||
84 | /* Match already found */ | |
85 | if (charmatch) | |
86 | continue; | |
87 | ||
88 | if (*c == *string) | |
89 | charmatch = 1; | |
90 | } | |
91 | ||
92 | /* No match in list */ | |
93 | if (!charmatch) | |
94 | return FNM_NOMATCH; | |
95 | ||
96 | string++; | |
97 | break; | |
98 | /* Has any character */ | |
99 | case '?': | |
100 | string++; | |
101 | break; | |
102 | /* Match following character verbatim */ | |
103 | case '\\': | |
104 | c++; | |
105 | /* Dangling escape at end of pattern. | |
106 | * FIXME: Was c == '\0' (makes no sense). | |
107 | * Not sure if c == NULL or *c == '\0' | |
108 | * is intended. Assuming *c due to c++ right before. */ | |
109 | if (*c == '\0') | |
110 | return FNM_NOMATCH; | |
111 | default: | |
112 | if (*c != *string) | |
113 | return FNM_NOMATCH; | |
114 | string++; | |
115 | } | |
116 | } | |
117 | ||
118 | /* End of string and end of pattend */ | |
119 | if (*string == '\0') | |
120 | return 0; | |
121 | return FNM_NOMATCH; | |
122 | } |