X-Git-Url: http://git.silcnet.org/gitweb/?a=blobdiff_plain;f=lib%2Fsilcutil%2Fsilcstrutil.c;h=1133c88dbf87814b3ea9b8f8e20e9267d5d9dfe4;hb=e9374395ec9747bddd3ea0bfd3e5a17717e97b31;hp=d4df969324d2ff855a74b72ee93761c8836e85c1;hpb=8fd8212bcd16f2b53fbedff2a9b9a4e8c15b9695;p=silc.git

diff --git a/lib/silcutil/silcstrutil.c b/lib/silcutil/silcstrutil.c
index d4df9693..1133c88d 100644
--- a/lib/silcutil/silcstrutil.c
+++ b/lib/silcutil/silcstrutil.c
@@ -314,3 +314,112 @@ char **silc_string_split(const char *string, char ch, int *ret_count)
 
   return splitted;
 }
+
+/* Inspects the `string' for wildcards and returns regex string that can
+   be used by the GNU regex library. A comma (`,') in the `string' means
+   that the string is list. */
+
+char *silc_string_regexify(const char *string)
+{
+  int i, len, count;
+  char *regex;
+
+  if (!string)
+    return NULL;
+
+  len = strlen(string);
+  count = 4;
+  for (i = 0; i < len; i++) {
+    if (string[i] == '*' || string[i] == '?')
+      count++;			/* Will add '.' */
+    if (string[i] == ',')
+      count += 2;		/* Will add '|' and '^' */
+  }
+
+  regex = silc_calloc(len + count + 1, sizeof(*regex));
+  if (!regex)
+    return NULL;
+
+  count = 0;
+  regex[count++] = '(';
+  regex[count++] = '^';
+
+  for (i = 0; i < len; i++) {
+    if (string[i] == '*' || string[i] == '?') {
+      regex[count] = '.';
+      count++;
+    } else if (string[i] == ',') {
+      if (i + 2 == len)
+	continue;
+      regex[count++] = '|';
+      regex[count++] = '^';
+      continue;
+    }
+
+    regex[count++] = string[i];
+  }
+
+  regex[count++] = ')';
+  regex[count] = '$';
+
+  return regex;
+}
+
+/* Combines two regex strings into one regex string so that they can be
+   used as one by the GNU regex library. The `string2' is combine into
+   the `string1'. */
+
+char *silc_string_regex_combine(const char *string1, const char *string2)
+{
+  char *tmp;
+  int len1, len2;
+
+  if (!string1 || !string2)
+    return NULL;
+
+  len1 = strlen(string1);
+  len2 = strlen(string2);
+
+  tmp = silc_calloc(2 + len1 + len2, sizeof(*tmp));
+  strncat(tmp, string1, len1 - 2);
+  strncat(tmp, "|", 1);
+  strncat(tmp, string2 + 1, len2 - 1);
+
+  return tmp;
+}
+
+/* Matches the two strings and returns TRUE if the strings match. */
+
+int silc_string_regex_match(const char *regex, const char *string)
+{
+  regex_t preg;
+  int ret = FALSE;
+
+  if (regcomp(&preg, regex, REG_NOSUB | REG_EXTENDED) != 0)
+    return FALSE;
+
+  if (regexec(&preg, string, 0, NULL, 0) == 0)
+    ret = TRUE;
+
+  regfree(&preg);
+
+  return ret;
+}
+
+/* Do regex match to the two strings `string1' and `string2'. If the
+   `string2' matches the `string1' this returns TRUE. */
+
+int silc_string_match(const char *string1, const char *string2)
+{
+  char *s1;
+  int ret = FALSE;
+
+  if (!string1 || !string2)
+    return ret;
+
+  s1 = silc_string_regexify(string1);
+  ret = silc_string_regex_match(s1, string2);
+  silc_free(s1);
+
+  return ret;
+}