| 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 | } |