summaryrefslogtreecommitdiff
path: root/wildmatch.c
diff options
context:
space:
mode:
Diffstat (limited to 'wildmatch.c')
-rw-r--r--wildmatch.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/wildmatch.c b/wildmatch.c
new file mode 100644
index 0000000000..d074c1be10
--- /dev/null
+++ b/wildmatch.c
@@ -0,0 +1,278 @@
+/*
+** 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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 20:50:14 +0000