1 /* $NetBSD: fnmatch.c,v 1.1.1.1 2016/01/13 03:15:30 christos Exp $ */ 2 3 /* Copyright 1991, 1992, 1993, 1996, 1997, 2000 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2, or (at your option) 8 any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software Foundation, 17 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 18 19 #if HAVE_CONFIG_H 20 # include <config.h> 21 #endif 22 23 /* Enable GNU extensions in fnmatch.h. */ 24 #ifndef _GNU_SOURCE 25 # define _GNU_SOURCE 1 26 #endif 27 28 #include <errno.h> 29 #include <fnmatch.h> 30 #include <ctype.h> 31 32 #if defined STDC_HEADERS || !defined isascii 33 # define IN_CTYPE_DOMAIN(c) 1 34 #else 35 # define IN_CTYPE_DOMAIN(c) isascii (c) 36 #endif 37 38 #define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c)) 39 40 41 #ifndef errno 42 extern int errno; 43 #endif 44 45 /* Match STRING against the filename pattern PATTERN, returning zero if 46 it matches, nonzero if not. */ 47 int 48 fnmatch (const char *pattern, const char *string, int flags) 49 { 50 register const char *p = pattern, *n = string; 51 register char c; 52 53 /* Note that this evaluates C many times. */ 54 #define FOLD(c) ((flags & FNM_CASEFOLD) && ISUPPER ((unsigned char) (c)) \ 55 ? tolower ((unsigned char) (c)) \ 56 : (c)) 57 58 while ((c = *p++) != '\0') 59 { 60 c = FOLD (c); 61 62 switch (c) 63 { 64 case '?': 65 if (*n == '\0') 66 return FNM_NOMATCH; 67 else if ((flags & FNM_FILE_NAME) && *n == '/') 68 return FNM_NOMATCH; 69 else if ((flags & FNM_PERIOD) && *n == '.' && 70 (n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/'))) 71 return FNM_NOMATCH; 72 break; 73 74 case '\\': 75 if (!(flags & FNM_NOESCAPE)) 76 { 77 c = *p++; 78 if (c == '\0') 79 /* Trailing \ loses. */ 80 return FNM_NOMATCH; 81 c = FOLD (c); 82 } 83 if (FOLD (*n) != c) 84 return FNM_NOMATCH; 85 break; 86 87 case '*': 88 if ((flags & FNM_PERIOD) && *n == '.' && 89 (n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/'))) 90 return FNM_NOMATCH; 91 92 for (c = *p++; c == '?' || c == '*'; c = *p++) 93 { 94 if (c == '?') 95 { 96 /* A ? needs to match one character. */ 97 if (*n == '\0' || (*n == '/' && (flags & FNM_FILE_NAME))) 98 /* There isn't another character; no match. */ 99 return FNM_NOMATCH; 100 else 101 /* One character of the string is consumed in matching 102 this ? wildcard, so *??? won't match if there are 103 less than three characters. */ 104 ++n; 105 } 106 } 107 108 if (c == '\0') 109 { 110 if ((flags & (FNM_FILE_NAME | FNM_LEADING_DIR)) == FNM_FILE_NAME) 111 for (; *n != '\0'; n++) 112 if (*n == '/') 113 return FNM_NOMATCH; 114 return 0; 115 } 116 117 { 118 char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c; 119 c1 = FOLD (c1); 120 for (--p; *n != '\0'; ++n) 121 if ((c == '[' || FOLD (*n) == c1) && 122 fnmatch (p, n, flags & ~FNM_PERIOD) == 0) 123 return 0; 124 else if (*n == '/' && (flags & FNM_FILE_NAME)) 125 break; 126 return FNM_NOMATCH; 127 } 128 129 case '[': 130 { 131 /* Nonzero if the sense of the character class is inverted. */ 132 register int not; 133 134 if (*n == '\0') 135 return FNM_NOMATCH; 136 137 if ((flags & FNM_PERIOD) && *n == '.' && 138 (n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/'))) 139 return FNM_NOMATCH; 140 141 not = (*p == '!' || *p == '^'); 142 if (not) 143 ++p; 144 145 c = *p++; 146 for (;;) 147 { 148 register char cstart = c, cend = c; 149 150 if (!(flags & FNM_NOESCAPE) && c == '\\') 151 { 152 if (*p == '\0') 153 return FNM_NOMATCH; 154 cstart = cend = *p++; 155 } 156 157 cstart = cend = FOLD (cstart); 158 159 if (c == '\0') 160 /* [ (unterminated) loses. */ 161 return FNM_NOMATCH; 162 163 c = *p++; 164 c = FOLD (c); 165 166 if ((flags & FNM_FILE_NAME) && c == '/') 167 /* [/] can never match. */ 168 return FNM_NOMATCH; 169 170 if (c == '-' && *p != ']') 171 { 172 cend = *p++; 173 if (!(flags & FNM_NOESCAPE) && cend == '\\') 174 cend = *p++; 175 if (cend == '\0') 176 return FNM_NOMATCH; 177 cend = FOLD (cend); 178 179 c = *p++; 180 } 181 182 if (FOLD (*n) >= cstart && FOLD (*n) <= cend) 183 goto matched; 184 185 if (c == ']') 186 break; 187 } 188 if (!not) 189 return FNM_NOMATCH; 190 break; 191 192 matched:; 193 /* Skip the rest of the [...] that already matched. */ 194 while (c != ']') 195 { 196 if (c == '\0') 197 /* [... (unterminated) loses. */ 198 return FNM_NOMATCH; 199 200 c = *p++; 201 if (!(flags & FNM_NOESCAPE) && c == '\\') 202 { 203 if (*p == '\0') 204 return FNM_NOMATCH; 205 /* XXX 1003.2d11 is unclear if this is right. */ 206 ++p; 207 } 208 } 209 if (not) 210 return FNM_NOMATCH; 211 } 212 break; 213 214 default: 215 if (c != FOLD (*n)) 216 return FNM_NOMATCH; 217 } 218 219 ++n; 220 } 221 222 if (*n == '\0') 223 return 0; 224 225 if ((flags & FNM_LEADING_DIR) && *n == '/') 226 /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz". */ 227 return 0; 228 229 return FNM_NOMATCH; 230 231 #undef FOLD 232 } 233