| 1 | /* |
| 2 | ** Do shell-style pattern matching for ?, \, [], and * characters. |
| 3 | ** It is 8bit clean. |
| 4 | ** |
| 5 | ** Written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986. |
| 6 | ** Rich $alz is now <rsalz@bbn.com>. |
| 7 | ** |
| 8 | ** Modified by Wayne Davison to special-case '/' matching, to make '**' |
| 9 | ** work differently than '*', and to fix the character-class code. |
| 10 | */ |
| 11 | |
| 12 | #include "rsync.h" |
| 13 | |
| 14 | /* What character marks an inverted character class? */ |
| 15 | #define NEGATE_CLASS '!' |
| 16 | #define NEGATE_CLASS2 '^' |
| 17 | |
| 18 | #define FALSE 0 |
| 19 | #define TRUE 1 |
| 20 | #define ABORT_ALL -1 |
| 21 | #define ABORT_TO_STARSTAR -2 |
| 22 | |
| 23 | #define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \ |
| 24 | && *(class) == *(litmatch) \ |
| 25 | && strncmp((char*)class, litmatch, len) == 0) |
| 26 | |
| 27 | #if defined STDC_HEADERS || !defined isascii |
| 28 | # define ISASCII(c) 1 |
| 29 | #else |
| 30 | # define ISASCII(c) isascii(c) |
| 31 | #endif |
| 32 | |
| 33 | #ifdef isblank |
| 34 | # define ISBLANK(c) (ISASCII(c) && isblank(c)) |
| 35 | #else |
| 36 | # define ISBLANK(c) ((c) == ' ' || (c) == '\t') |
| 37 | #endif |
| 38 | |
| 39 | #ifdef isgraph |
| 40 | # define ISGRAPH(c) (ISASCII(c) && isgraph(c)) |
| 41 | #else |
| 42 | # define ISGRAPH(c) (ISASCII(c) && isprint(c) && !isspace(c)) |
| 43 | #endif |
| 44 | |
| 45 | #define ISPRINT(c) (ISASCII(c) && isprint(c)) |
| 46 | #define ISDIGIT(c) (ISASCII(c) && isdigit(c)) |
| 47 | #define ISALNUM(c) (ISASCII(c) && isalnum(c)) |
| 48 | #define ISALPHA(c) (ISASCII(c) && isalpha(c)) |
| 49 | #define ISCNTRL(c) (ISASCII(c) && iscntrl(c)) |
| 50 | #define ISLOWER(c) (ISASCII(c) && islower(c)) |
| 51 | #define ISPUNCT(c) (ISASCII(c) && ispunct(c)) |
| 52 | #define ISSPACE(c) (ISASCII(c) && isspace(c)) |
| 53 | #define ISUPPER(c) (ISASCII(c) && isupper(c)) |
| 54 | #define ISXDIGIT(c) (ISASCII(c) && isxdigit(c)) |
| 55 | |
| 56 | #ifdef WILD_TEST_ITERATIONS |
| 57 | int wildmatch_iteration_count; |
| 58 | #endif |
| 59 | |
| 60 | static int domatch(const unsigned char *p, const unsigned char *text) |
| 61 | { |
| 62 | int matched, special; |
| 63 | unsigned char ch, prev; |
| 64 | |
| 65 | #ifdef WILD_TEST_ITERATIONS |
| 66 | wildmatch_iteration_count++; |
| 67 | #endif |
| 68 | |
| 69 | for ( ; (ch = *p) != '\0'; text++, p++) { |
| 70 | if (*text == '\0' && ch != '*') |
| 71 | return FALSE; |
| 72 | switch (ch) { |
| 73 | case '\\': |
| 74 | /* Literal match with following character. Note that the test |
| 75 | * in "default" handles the p[1] == '\0' failure case. */ |
| 76 | ch = *++p; |
| 77 | /* FALLTHROUGH */ |
| 78 | default: |
| 79 | if (*text != ch) |
| 80 | return FALSE; |
| 81 | continue; |
| 82 | case '?': |
| 83 | /* Match anything but '/'. */ |
| 84 | if (*text == '/') |
| 85 | return FALSE; |
| 86 | continue; |
| 87 | case '*': |
| 88 | if (*++p == '*') { |
| 89 | while (*++p == '*') {} |
| 90 | special = TRUE; |
| 91 | } |
| 92 | else |
| 93 | special = FALSE; |
| 94 | if (*p == '\0') { |
| 95 | /* Trailing "**" matches everything. Trailing "*" matches |
| 96 | * only if there are no more slash characters. */ |
| 97 | return special? TRUE : strchr((char*)text, '/') == NULL; |
| 98 | } |
| 99 | for ( ; *text; text++) { |
| 100 | if ((matched = domatch(p, text)) != FALSE) { |
| 101 | if (!special || matched != ABORT_TO_STARSTAR) |
| 102 | return matched; |
| 103 | } |
| 104 | else if (!special && *text == '/') |
| 105 | return ABORT_TO_STARSTAR; |
| 106 | } |
| 107 | return ABORT_ALL; |
| 108 | case '[': |
| 109 | ch = *++p; |
| 110 | #ifdef NEGATE_CLASS2 |
| 111 | if (ch == NEGATE_CLASS2) |
| 112 | ch = NEGATE_CLASS; |
| 113 | #endif |
| 114 | /* Assign literal TRUE/FALSE because of "matched" comparison. */ |
| 115 | special = ch == NEGATE_CLASS? TRUE : FALSE; |
| 116 | if (special) { |
| 117 | /* Inverted character class. */ |
| 118 | ch = *++p; |
| 119 | } |
| 120 | prev = 0; |
| 121 | matched = FALSE; |
| 122 | do { |
| 123 | if (!ch) |
| 124 | return ABORT_ALL; |
| 125 | if (ch == '\\') { |
| 126 | ch = *++p; |
| 127 | if (!ch) |
| 128 | return ABORT_ALL; |
| 129 | if (*text == ch) |
| 130 | matched = TRUE; |
| 131 | } |
| 132 | else if (ch == '-' && prev && p[1] && p[1] != ']') { |
| 133 | ch = *++p; |
| 134 | if (ch == '\\') { |
| 135 | ch = *++p; |
| 136 | if (!ch) |
| 137 | return ABORT_ALL; |
| 138 | } |
| 139 | if (*text <= ch && *text >= prev) |
| 140 | matched = TRUE; |
| 141 | ch = 0; /* This makes "prev" get set to 0. */ |
| 142 | } |
| 143 | else if (ch == '[' && p[1] == ':') { |
| 144 | const unsigned char *s = p += 2; |
| 145 | int i; |
| 146 | while ((ch = *p) && ch != ']') p++; |
| 147 | if (!ch) |
| 148 | return ABORT_ALL; |
| 149 | i = p - s - 1; |
| 150 | if (i < 0 || p[-1] != ':') { |
| 151 | /* Didn't find ":]", so treat like a normal set. */ |
| 152 | p = s - 2; |
| 153 | ch = '['; |
| 154 | if (*text == ch) |
| 155 | matched = TRUE; |
| 156 | continue; |
| 157 | } |
| 158 | if (CC_EQ(s,i, "alnum")) { |
| 159 | if (ISALNUM(*text)) |
| 160 | matched = TRUE; |
| 161 | } |
| 162 | else if (CC_EQ(s,i, "alpha")) { |
| 163 | if (ISALPHA(*text)) |
| 164 | matched = TRUE; |
| 165 | } |
| 166 | else if (CC_EQ(s,i, "blank")) { |
| 167 | if (ISBLANK(*text)) |
| 168 | matched = TRUE; |
| 169 | } |
| 170 | else if (CC_EQ(s,i, "cntrl")) { |
| 171 | if (ISCNTRL(*text)) |
| 172 | matched = TRUE; |
| 173 | } |
| 174 | else if (CC_EQ(s,i, "digit")) { |
| 175 | if (ISDIGIT(*text)) |
| 176 | matched = TRUE; |
| 177 | } |
| 178 | else if (CC_EQ(s,i, "graph")) { |
| 179 | if (ISGRAPH(*text)) |
| 180 | matched = TRUE; |
| 181 | } |
| 182 | else if (CC_EQ(s,i, "lower")) { |
| 183 | if (ISLOWER(*text)) |
| 184 | matched = TRUE; |
| 185 | } |
| 186 | else if (CC_EQ(s,i, "print")) { |
| 187 | if (ISPRINT(*text)) |
| 188 | matched = TRUE; |
| 189 | } |
| 190 | else if (CC_EQ(s,i, "punct")) { |
| 191 | if (ISPUNCT(*text)) |
| 192 | matched = TRUE; |
| 193 | } |
| 194 | else if (CC_EQ(s,i, "space")) { |
| 195 | if (ISSPACE(*text)) |
| 196 | matched = TRUE; |
| 197 | } |
| 198 | else if (CC_EQ(s,i, "upper")) { |
| 199 | if (ISUPPER(*text)) |
| 200 | matched = TRUE; |
| 201 | } |
| 202 | else if (CC_EQ(s,i, "xdigit")) { |
| 203 | if (ISXDIGIT(*text)) |
| 204 | matched = TRUE; |
| 205 | } |
| 206 | else /* malformed [:class:] string */ |
| 207 | return ABORT_ALL; |
| 208 | ch = 0; /* This makes "prev" get set to 0. */ |
| 209 | } |
| 210 | else if (*text == ch) |
| 211 | matched = TRUE; |
| 212 | } while (prev = ch, (ch = *++p) != ']'); |
| 213 | if (matched == special || *text == '/') |
| 214 | return FALSE; |
| 215 | continue; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | return *text == '\0'; |
| 220 | } |
| 221 | |
| 222 | /* Find the pattern (p) in the text string (t). */ |
| 223 | int wildmatch(const char *p, const char *t) |
| 224 | { |
| 225 | #ifdef WILD_TEST_ITERATIONS |
| 226 | wildmatch_iteration_count = 0; |
| 227 | #endif |
| 228 | return domatch((const unsigned char*)p, (const unsigned char*)t) == TRUE; |
| 229 | } |