| /* |
| ** Do shell-style pattern matching for ?, \, [], and * characters. |
| ** It is 8bit clean. |
| ** |
| ** Written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986. |
| ** Rich $alz is now <rsalz@bbn.com>. |
| ** |
| ** Modified by Wayne Davison to special-case '/' matching, to make '**' |
| ** work differently than '*', and to fix the character-class code. |
| */ |
| |
| #include "cache.h" |
| #include "wildmatch.h" |
| |
| typedef unsigned char uchar; |
| |
| /* What character marks an inverted character class? */ |
| #define NEGATE_CLASS '!' |
| #define NEGATE_CLASS2 '^' |
| |
| #define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \ |
| && *(class) == *(litmatch) \ |
| && strncmp((char*)class, litmatch, len) == 0) |
| |
| #if defined STDC_HEADERS || !defined isascii |
| # define ISASCII(c) 1 |
| #else |
| # define ISASCII(c) isascii(c) |
| #endif |
| |
| #ifdef isblank |
| # define ISBLANK(c) (ISASCII(c) && isblank(c)) |
| #else |
| # define ISBLANK(c) ((c) == ' ' || (c) == '\t') |
| #endif |
| |
| #ifdef isgraph |
| # define ISGRAPH(c) (ISASCII(c) && isgraph(c)) |
| #else |
| # define ISGRAPH(c) (ISASCII(c) && isprint(c) && !isspace(c)) |
| #endif |
| |
| #define ISPRINT(c) (ISASCII(c) && isprint(c)) |
| #define ISDIGIT(c) (ISASCII(c) && isdigit(c)) |
| #define ISALNUM(c) (ISASCII(c) && isalnum(c)) |
| #define ISALPHA(c) (ISASCII(c) && isalpha(c)) |
| #define ISCNTRL(c) (ISASCII(c) && iscntrl(c)) |
| #define ISLOWER(c) (ISASCII(c) && islower(c)) |
| #define ISPUNCT(c) (ISASCII(c) && ispunct(c)) |
| #define ISSPACE(c) (ISASCII(c) && isspace(c)) |
| #define ISUPPER(c) (ISASCII(c) && isupper(c)) |
| #define ISXDIGIT(c) (ISASCII(c) && isxdigit(c)) |
| |
| /* Match pattern "p" against "text" */ |
| static int dowild(const uchar *p, const uchar *text, unsigned int flags) |
| { |
| uchar p_ch; |
| const uchar *pattern = p; |
| |
| for ( ; (p_ch = *p) != '\0'; text++, p++) { |
| int matched, match_slash, negated; |
| uchar t_ch, prev_ch; |
| if ((t_ch = *text) == '\0' && p_ch != '*') |
| return WM_ABORT_ALL; |
| if ((flags & WM_CASEFOLD) && ISUPPER(t_ch)) |
| t_ch = tolower(t_ch); |
| if ((flags & WM_CASEFOLD) && ISUPPER(p_ch)) |
| p_ch = tolower(p_ch); |
| switch (p_ch) { |
| case '\\': |
| /* Literal match with following character. Note that the test |
| * in "default" handles the p[1] == '\0' failure case. */ |
| p_ch = *++p; |
| /* FALLTHROUGH */ |
| default: |
| if (t_ch != p_ch) |
| return WM_NOMATCH; |
| continue; |
| case '?': |
| /* Match anything but '/'. */ |
| if ((flags & WM_PATHNAME) && t_ch == '/') |
| return WM_NOMATCH; |
| continue; |
| case '*': |
| if (*++p == '*') { |
| const uchar *prev_p = p - 2; |
| while (*++p == '*') {} |
| if (!(flags & WM_PATHNAME)) |
| /* without WM_PATHNAME, '*' == '**' */ |
| match_slash = 1; |
| else if ((prev_p < pattern || *prev_p == '/') && |
| (*p == '\0' || *p == '/' || |
| (p[0] == '\\' && p[1] == '/'))) { |
| /* |
| * Assuming we already match 'foo/' and are at |
| * <star star slash>, just assume it matches |
| * nothing and go ahead match the rest of the |
| * pattern with the remaining string. This |
| * helps make foo/<*><*>/bar (<> because |
| * otherwise it breaks C comment syntax) match |
| * both foo/bar and foo/a/bar. |
| */ |
| if (p[0] == '/' && |
| dowild(p + 1, text, flags) == WM_MATCH) |
| return WM_MATCH; |
| match_slash = 1; |
| } else |
| return WM_ABORT_MALFORMED; |
| } else |
| /* without WM_PATHNAME, '*' == '**' */ |
| match_slash = flags & WM_PATHNAME ? 0 : 1; |
| if (*p == '\0') { |
| /* Trailing "**" matches everything. Trailing "*" matches |
| * only if there are no more slash characters. */ |
| if (!match_slash) { |
| if (strchr((char*)text, '/') != NULL) |
| return WM_NOMATCH; |
| } |
| return WM_MATCH; |
| } else if (!match_slash && *p == '/') { |
| /* |
| * _one_ asterisk followed by a slash |
| * with WM_PATHNAME matches the next |
| * directory |
| */ |
| const char *slash = strchr((char*)text, '/'); |
| if (!slash) |
| return WM_NOMATCH; |
| text = (const uchar*)slash; |
| /* the slash is consumed by the top-level for loop */ |
| break; |
| } |
| while (1) { |
| if (t_ch == '\0') |
| break; |
| /* |
| * Try to advance faster when an asterisk is |
| * followed by a literal. We know in this case |
| * that the string before the literal |
| * must belong to "*". |
| * If match_slash is false, do not look past |
| * the first slash as it cannot belong to '*'. |
| */ |
| if (!is_glob_special(*p)) { |
| p_ch = *p; |
| if ((flags & WM_CASEFOLD) && ISUPPER(p_ch)) |
| p_ch = tolower(p_ch); |
| while ((t_ch = *text) != '\0' && |
| (match_slash || t_ch != '/')) { |
| if ((flags & WM_CASEFOLD) && ISUPPER(t_ch)) |
| t_ch = tolower(t_ch); |
| if (t_ch == p_ch) |
| break; |
| text++; |
| } |
| if (t_ch != p_ch) |
| return WM_NOMATCH; |
| } |
| if ((matched = dowild(p, text, flags)) != WM_NOMATCH) { |
| if (!match_slash || matched != WM_ABORT_TO_STARSTAR) |
| return matched; |
| } else if (!match_slash && t_ch == '/') |
| return WM_ABORT_TO_STARSTAR; |
| t_ch = *++text; |
| } |
| return WM_ABORT_ALL; |
| case '[': |
| p_ch = *++p; |
| #ifdef NEGATE_CLASS2 |
| if (p_ch == NEGATE_CLASS2) |
| p_ch = NEGATE_CLASS; |
| #endif |
| /* Assign literal 1/0 because of "matched" comparison. */ |
| negated = p_ch == NEGATE_CLASS ? 1 : 0; |
| if (negated) { |
| /* Inverted character class. */ |
| p_ch = *++p; |
| } |
| prev_ch = 0; |
| matched = 0; |
| do { |
| if (!p_ch) |
| return WM_ABORT_ALL; |
| if (p_ch == '\\') { |
| p_ch = *++p; |
| if (!p_ch) |
| return WM_ABORT_ALL; |
| if (t_ch == p_ch) |
| matched = 1; |
| } else if (p_ch == '-' && prev_ch && p[1] && p[1] != ']') { |
| p_ch = *++p; |
| if (p_ch == '\\') { |
| p_ch = *++p; |
| if (!p_ch) |
| return WM_ABORT_ALL; |
| } |
| if (t_ch <= p_ch && t_ch >= prev_ch) |
| matched = 1; |
| else if ((flags & WM_CASEFOLD) && ISLOWER(t_ch)) { |
| uchar t_ch_upper = toupper(t_ch); |
| if (t_ch_upper <= p_ch && t_ch_upper >= prev_ch) |
| matched = 1; |
| } |
| p_ch = 0; /* This makes "prev_ch" get set to 0. */ |
| } else if (p_ch == '[' && p[1] == ':') { |
| const uchar *s; |
| int i; |
| for (s = p += 2; (p_ch = *p) && p_ch != ']'; p++) {} /*SHARED ITERATOR*/ |
| if (!p_ch) |
| return WM_ABORT_ALL; |
| i = p - s - 1; |
| if (i < 0 || p[-1] != ':') { |
| /* Didn't find ":]", so treat like a normal set. */ |
| p = s - 2; |
| p_ch = '['; |
| if (t_ch == p_ch) |
| matched = 1; |
| continue; |
| } |
| if (CC_EQ(s,i, "alnum")) { |
| if (ISALNUM(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "alpha")) { |
| if (ISALPHA(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "blank")) { |
| if (ISBLANK(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "cntrl")) { |
| if (ISCNTRL(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "digit")) { |
| if (ISDIGIT(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "graph")) { |
| if (ISGRAPH(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "lower")) { |
| if (ISLOWER(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "print")) { |
| if (ISPRINT(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "punct")) { |
| if (ISPUNCT(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "space")) { |
| if (ISSPACE(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "upper")) { |
| if (ISUPPER(t_ch)) |
| matched = 1; |
| else if ((flags & WM_CASEFOLD) && ISLOWER(t_ch)) |
| matched = 1; |
| } else if (CC_EQ(s,i, "xdigit")) { |
| if (ISXDIGIT(t_ch)) |
| matched = 1; |
| } else /* malformed [:class:] string */ |
| return WM_ABORT_ALL; |
| p_ch = 0; /* This makes "prev_ch" get set to 0. */ |
| } else if (t_ch == p_ch) |
| matched = 1; |
| } while (prev_ch = p_ch, (p_ch = *++p) != ']'); |
| if (matched == negated || |
| ((flags & WM_PATHNAME) && t_ch == '/')) |
| return WM_NOMATCH; |
| continue; |
| } |
| } |
| |
| return *text ? WM_NOMATCH : WM_MATCH; |
| } |
| |
| /* Match the "pattern" against the "text" string. */ |
| int wildmatch(const char *pattern, const char *text, unsigned int flags) |
| { |
| return dowild((const uchar*)pattern, (const uchar*)text, flags); |
| } |
