Adding ranges and cfstring_find

src/cfwstring.c

@@ -131,6 +131,37 @@ cfw_string_set(CFWString *str, const char *cstr)
 	return true;
 }
 
+cfw_unichar
+cfw_string_char(CFWString *str, size_t index)
+{
+	if(len > index)
+		return str->cstr[index];
+	return NULL;
+}
+
+size_t
+cfw_string_find(CFWString *strA, CFWString *strB, cfw_range_t range)
+{
+	char *cstrA = strA->cstr+range.location;
+	size_t i, max = MIN(range.length+range.location, strB->len);
+	
+	if(strA->len == 0)
+		return 0;
+	
+	if(strA->len-range.location < strB->len)
+		return SIZE_MAX;
+	
+	for(i = range.location;
+		i <= strA->len-strB->len && i <= max;
+		i++)
+	{
+		if(!memcmp(strA->cstr+i, strB->cstr, max-i))
+			return i;
+	}
+	
+	return SIZE_MAX;
+}
+
 static CFWClass class = {
 	.name = "CFWString",
 	.size = sizeof(CFWString),