--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nss/lib/util/portreg.c	Mon Jul 28 10:47:06 2014 +0200
@@ -0,0 +1,377 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* 
+ * shexp.c: shell-like wildcard match routines
+ *
+ * See shexp.h for public documentation.
+ */
+
+#include "seccomon.h"
+#include "portreg.h"
+
+/* ----------------------------- shexp_valid ------------------------------ */
+
+
+static int 
+_valid_subexp(const char *exp, char stop1, char stop2) 
+{
+    register int x;
+    int nsc = 0;     /* Number of special characters */
+    int np;          /* Number of pipe characters in union */
+    int tld = 0;     /* Number of tilde characters */
+
+    for (x = 0; exp[x] && (exp[x] != stop1) && (exp[x] != stop2); ++x) {
+        switch(exp[x]) {
+	case '~':
+            if(tld)                 /* at most one exclusion */
+                return INVALID_SXP;
+            if (stop1)              /* no exclusions within unions */
+                return INVALID_SXP;
+            if (!exp[x+1])          /* exclusion cannot be last character */
+                return INVALID_SXP;
+            if (!x)                 /* exclusion cannot be first character */
+                return INVALID_SXP;
+            ++tld;
+	    /* fall through */
+	case '*':
+	case '?':
+	case '$':
+            ++nsc;
+            break;
+	case '[':
+            ++nsc;
+            if((!exp[++x]) || (exp[x] == ']'))
+                return INVALID_SXP;
+            for(; exp[x] && (exp[x] != ']'); ++x) {
+                if(exp[x] == '\\' && !exp[++x])
+                    return INVALID_SXP;
+            }
+            if(!exp[x])
+                return INVALID_SXP;
+            break;
+	case '(':
+            ++nsc;
+	    if (stop1)			/* no nested unions */
+		return INVALID_SXP;
+            np = -1;
+            do {
+                int t = _valid_subexp(&exp[++x], ')', '|');
+                if(t == 0 || t == INVALID_SXP)
+                    return INVALID_SXP;
+                x+=t;
+		if(!exp[x])
+		    return INVALID_SXP;
+		++np;
+            } while (exp[x] == '|' );
+	    if(np < 1)  /* must be at least one pipe */
+		return INVALID_SXP;
+            break;
+	case ')':
+	case '|':
+	case ']':
+            return INVALID_SXP;
+	case '\\':
+	    ++nsc;
+            if(!exp[++x])
+                return INVALID_SXP;
+            break;
+	default:
+            break;
+        }
+    }
+    if((!stop1) && (!nsc)) /* must be at least one special character */
+        return NON_SXP;
+    return ((exp[x] == stop1 || exp[x] == stop2) ? x : INVALID_SXP);
+}
+
+int 
+PORT_RegExpValid(const char *exp) 
+{
+    int x;
+
+    x = _valid_subexp(exp, '\0', '\0');
+    return (x < 0 ? x : VALID_SXP);
+}
+
+
+/* ----------------------------- shexp_match ----------------------------- */
+
+
+#define MATCH 0
+#define NOMATCH 1
+#define ABORTED -1
+
+static int 
+_shexp_match(const char *str, const char *exp, PRBool case_insensitive,
+             unsigned int level);
+
+/* Count characters until we reach a NUL character or either of the 
+ * two delimiter characters, stop1 or stop2.  If we encounter a bracketed 
+ * expression, look only for NUL or ']' inside it.  Do not look for stop1 
+ * or stop2 inside it. Return ABORTED if bracketed expression is unterminated.
+ * Handle all escaping.
+ * Return index in input string of first stop found, or ABORTED if not found.
+ * If "dest" is non-NULL, copy counted characters to it and NUL terminate.
+ */
+static int 
+_scan_and_copy(const char *exp, char stop1, char stop2, char *dest)
+{
+    register int sx;     /* source index */
+    register char cc;
+
+    for (sx = 0; (cc = exp[sx]) && cc != stop1 && cc != stop2; sx++) {
+	if (cc == '\\') {
+	    if (!exp[++sx])
+		return ABORTED; /* should be impossible */
+	} else if (cc == '[') {
+	    while ((cc = exp[++sx]) && cc != ']') {
+		if(cc == '\\' && !exp[++sx])
+		    return ABORTED;
+	    }
+	    if (!cc) 
+		return ABORTED; /* should be impossible */
+	}
+    }
+    if (dest && sx) {
+	/* Copy all but the closing delimiter. */
+	memcpy(dest, exp, sx);
+	dest[sx] = 0;
+    }
+    return cc ? sx : ABORTED; /* index of closing delimiter */
+}
+
+/* On input, exp[0] is the opening parenthesis of a union.
+ * See if any of the alternatives in the union matches as a pattern.
+ * The strategy is to take each of the alternatives, in turn, and append
+ * the rest of the expression (after the closing ')' that marks the end of 
+ * this union) to that alternative, and then see if the resultant expression
+ * matches the input string.  Repeat this until some alternative matches, 
+ * or we have an abort. 
+ */
+static int 
+_handle_union(const char *str, const char *exp, PRBool case_insensitive,
+              unsigned int level) 
+{
+    register int sx;     /* source index */
+    int cp;              /* source index of closing parenthesis */
+    int count;
+    int ret   = NOMATCH;
+    char *e2;
+
+    /* Find the closing parenthesis that ends this union in the expression */
+    cp = _scan_and_copy(exp, ')', '\0', NULL);
+    if (cp == ABORTED || cp < 4) /* must be at least "(a|b" before ')' */
+    	return ABORTED;
+    ++cp;                /* now index of char after closing parenthesis */
+    e2 = (char *) PORT_Alloc(1 + strlen(exp));
+    if (!e2)
+    	return ABORTED;
+    for (sx = 1; ; ++sx) {
+	/* Here, exp[sx] is one character past the preceding '(' or '|'. */
+	/* Copy everything up to the next delimiter to e2 */
+	count = _scan_and_copy(exp + sx, ')', '|', e2);
+	if (count == ABORTED || !count) {
+	    ret = ABORTED;
+	    break;
+	}
+	sx += count;
+	/* Append everything after closing parenthesis to e2. This is safe. */
+	strcpy(e2+count, exp+cp);
+        ret = _shexp_match(str, e2, case_insensitive, level + 1);
+	if (ret != NOMATCH || !exp[sx] || exp[sx] == ')')
+            break;
+    }
+    PORT_Free(e2);
+    if (sx < 2)
+    	ret = ABORTED;
+    return ret;
+}
+
+/* returns 1 if val is in range from start..end, case insensitive. */
+static int
+_is_char_in_range(int start, int end, int val)
+{
+    char map[256];
+    memset(map, 0, sizeof map);
+    while (start <= end)
+	map[tolower(start++)] = 1;
+    return map[tolower(val)];
+}
+
+static int 
+_shexp_match(const char *str, const char *exp, PRBool case_insensitive, 
+             unsigned int level) 
+{
+    register int x;   /* input string index */
+    register int y;   /* expression index */
+    int ret,neg;
+
+    if (level > 20)      /* Don't let the stack get too deep. */
+    	return ABORTED;
+    for(x = 0, y = 0; exp[y]; ++y, ++x) {
+        if((!str[x]) && (exp[y] != '$') && (exp[y] != '*')) {
+            return NOMATCH;
+	}
+	switch(exp[y]) {
+	case '$':
+	    if(str[x])
+		return NOMATCH;
+	    --x;                 /* we don't want loop to increment x */
+	    break;
+	case '*':
+	    while(exp[++y] == '*'){}
+	    if(!exp[y])
+		return MATCH;
+	    while(str[x]) {
+	        ret = _shexp_match(&str[x++], &exp[y], case_insensitive, 
+				   level + 1);
+		switch(ret) {
+		case NOMATCH:
+		    continue;
+		case ABORTED:
+		    return ABORTED;
+		default:
+		    return MATCH;
+		}
+	    }
+	    if((exp[y] == '$') && (exp[y+1] == '\0') && (!str[x]))
+		return MATCH;
+	    else
+		return NOMATCH;
+	case '[': {
+	    int start, end = 0, i;
+	    neg = ((exp[++y] == '^') && (exp[y+1] != ']'));
+	    if (neg)
+		++y;
+	    i = y;
+	    start = (unsigned char)(exp[i++]);
+	    if (start == '\\')
+	    	start = (unsigned char)(exp[i++]);
+	    if (isalnum(start) && exp[i++] == '-') {
+		end = (unsigned char)(exp[i++]); 
+		if (end == '\\')
+		    end = (unsigned char)(exp[i++]);
+	    }
+	    if (isalnum(end) && exp[i] == ']') {
+		/* This is a range form: a-b */
+		int val   = (unsigned char)(str[x]);
+		if (end < start) { /* swap them */
+		    start ^= end;
+		    end ^= start;
+		    start ^= end;
+		}
+		if (case_insensitive && isalpha(val)) {
+		    val = _is_char_in_range(start, end, val);
+		    if (neg == val)
+			return NOMATCH;
+		} else if (neg != ((val < start) || (val > end))) {
+		    return NOMATCH;
+		}
+		y = i;
+	    } else {
+		/* Not range form */
+		int matched = 0;
+		for (; exp[y] != ']'; y++) {
+		    if (exp[y] == '\\')
+			++y;
+		    if(case_insensitive) {
+			matched |= (toupper(str[x]) == toupper(exp[y]));
+		    } else {
+			matched |= (str[x] == exp[y]);
+		    }
+		}
+		if (neg == matched)
+		    return NOMATCH;
+	    }
+	}
+	break;
+	case '(':
+	    if (!exp[y+1])
+	    	return ABORTED;
+	    return _handle_union(&str[x], &exp[y], case_insensitive, level);
+	case '?':
+	    break;
+	case '|':
+	case ']':
+	case ')':
+	    return ABORTED;
+	case '\\':
+	    ++y;
+	    /* fall through */
+	default:
+	    if(case_insensitive) {
+		if(toupper(str[x]) != toupper(exp[y]))
+		    return NOMATCH;
+	    } else {
+		if(str[x] != exp[y])
+		    return NOMATCH;
+	    }
+	    break;
+	}
+    }
+    return (str[x] ? NOMATCH : MATCH);
+}
+
+static int 
+port_RegExpMatch(const char *str, const char *xp, PRBool case_insensitive) 
+{
+    char *exp = 0;
+    int x, ret = MATCH;
+
+    if (!strchr(xp, '~'))
+    	return _shexp_match(str, xp, case_insensitive, 0);
+
+    exp = PORT_Strdup(xp);
+    if(!exp)
+	return NOMATCH;
+
+    x = _scan_and_copy(exp, '~', '\0', NULL);
+    if (x != ABORTED && exp[x] == '~') {
+	exp[x++] = '\0';
+	ret = _shexp_match(str, &exp[x], case_insensitive, 0);
+	switch (ret) {
+	case NOMATCH: ret = MATCH;   break;
+	case MATCH:   ret = NOMATCH; break;
+	default:                     break;
+        }
+    }
+    if (ret == MATCH)
+	ret = _shexp_match(str, exp, case_insensitive, 0);
+
+    PORT_Free(exp);
+    return ret;
+}
+
+
+/* ------------------------------ shexp_cmp ------------------------------- */
+
+int 
+PORT_RegExpSearch(const char *str, const char *exp)
+{
+    switch(PORT_RegExpValid(exp)) 
+	  {
+        case INVALID_SXP:
+            return -1;
+        case NON_SXP:
+            return (strcmp(exp,str) ? 1 : 0);
+        default:
+            return port_RegExpMatch(str, exp, PR_FALSE);
+      }
+}
+
+int
+PORT_RegExpCaseSearch(const char *str, const char *exp)
+{
+    switch(PORT_RegExpValid(exp))
+      {
+        case INVALID_SXP:
+            return -1;
+        case NON_SXP:
+            return (PORT_Strcasecmp(exp,str) ? 1 : 0);
+        default:
+            return port_RegExpMatch(str, exp, PR_TRUE);
+      }
+}
+