projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| d4120dc2 KB |
1 | /* |
| 2 | * Copyright (c) 1989 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Guido van Rossum. | |
| 7 | * | |
| 269a7923 | 8 | * %sccs.include.redist.c% |
| d4120dc2 KB |
9 | */ |
| 10 | ||
| 11 | #if defined(LIBC_SCCS) && !defined(lint) | |
| 269a7923 | 12 | static char sccsid[] = "@(#)fnmatch.c 5.2 (Berkeley) %G%"; |
| d4120dc2 KB |
13 | #endif /* LIBC_SCCS and not lint */ |
| 14 | ||
| 15 | /* | |
| 16 | * Function fnmatch() as proposed in Posix 1003.2 B.6 (rev. 9). | |
| 17 | * Compares a filename or pathname to a pattern. | |
| 18 | */ | |
| 19 | ||
| 20 | #include <unistd.h> | |
| 21 | #include <string.h> | |
| 22 | ||
| 23 | #define EOS '\0' | |
| 24 | ||
| 25 | fnmatch(pattern, string, flags) | |
| 26 | register char *pattern, *string; | |
| 27 | int flags; | |
| 28 | { | |
| 29 | register char c; | |
| 30 | char test, *rangematch(); | |
| 31 | ||
| 32 | for (;;) | |
| 33 | switch (c = *pattern++) { | |
| 34 | case EOS: | |
| 35 | return(*string == EOS); | |
| 36 | case '?': | |
| 37 | if ((test = *string++) == EOS || | |
| 38 | test == '/' && flags & FNM_PATHNAME) | |
| 39 | return(0); | |
| 40 | break; | |
| 41 | case '*': | |
| 42 | c = *pattern; | |
| 43 | /* collapse multiple stars */ | |
| 44 | while (c == '*') | |
| 45 | c = *++pattern; | |
| 46 | ||
| 47 | /* optimize for pattern with * at end or before / */ | |
| 48 | if (c == EOS) | |
| 49 | if (flags & FNM_PATHNAME) | |
| 50 | return(!index(string, '/')); | |
| 51 | else | |
| 52 | return(1); | |
| 53 | else if (c == '/' && flags & FNM_PATHNAME) { | |
| 54 | if ((string = index(string, '/')) == NULL) | |
| 55 | return(0); | |
| 56 | break; | |
| 57 | } | |
| 58 | ||
| 59 | /* general case, use recursion */ | |
| 60 | while ((test = *string) != EOS) { | |
| 61 | if (fnmatch(pattern, string, flags)) | |
| 62 | return(1); | |
| 63 | if (test == '/' && flags & FNM_PATHNAME) | |
| 64 | break; | |
| 65 | ++string; | |
| 66 | } | |
| 67 | return(0); | |
| 68 | case '[': | |
| 69 | if ((test = *string++) == EOS || | |
| 70 | test == '/' && flags & FNM_PATHNAME) | |
| 71 | return(0); | |
| 72 | if ((pattern = rangematch(pattern, test)) == NULL) | |
| 73 | return(0); | |
| 74 | break; | |
| 75 | case '\\': | |
| 76 | if (flags & FNM_QUOTE) { | |
| 77 | if ((c = *pattern++) == EOS) { | |
| 78 | c = '\\'; | |
| 79 | --pattern; | |
| 80 | } | |
| 81 | if (c != *string++) | |
| 82 | return(0); | |
| 83 | break; | |
| 84 | } | |
| 85 | /* FALLTHROUGH */ | |
| 86 | default: | |
| 87 | if (c != *string++) | |
| 88 | return(0); | |
| 89 | break; | |
| 90 | } | |
| 91 | } | |
| 92 | ||
| 93 | static char * | |
| 94 | rangematch(pattern, test) | |
| 95 | register char *pattern, test; | |
| 96 | { | |
| 97 | register char c, c2; | |
| 98 | int negate, ok; | |
| 99 | ||
| 100 | if (negate = (*pattern == '!')) | |
| 101 | ++pattern; | |
| 102 | ||
| 103 | /* | |
| 104 | * TO DO: quoting | |
| 105 | */ | |
| 106 | ||
| 107 | for (ok = 0; (c = *pattern++) != ']';) { | |
| 108 | if (c == EOS) | |
| 109 | return(NULL); /* illegal pattern */ | |
| 110 | if (*pattern == '-' && (c2 = pattern[1]) != EOS && c2 != ']') { | |
| 111 | if (c <= test && test <= c2) | |
| 112 | ok = 1; | |
| 113 | pattern += 2; | |
| 114 | } | |
| 115 | else if (c == test) | |
| 116 | ok = 1; | |
| 117 | } | |
| 118 | return(ok == negate ? NULL : pattern); | |
| 119 | } |