3 files changed, 20 insertions, 8 deletions
diff --git a/lib/misc.c b/lib/misc.c
index 9384ac4c..1c93f65a 100644
--- a/lib/misc.c
+++ b/lib/misc.c
@@ -770,3 +770,19 @@ gboolean parse_int64(char *string, int base, guint64 *number)
 	return TRUE;
 }
 
+/* Filters all the characters in 'blacklist' replacing them with 'replacement'.
+ * Modifies the string in-place and returns the string itself.
+ * For the opposite, use g_strcanon() */
+char *str_reject_chars(char *string, const char *reject, char replacement)
+{
+	char *c = string;
+
+	while (*c) {
+		c += strcspn(c, reject);
+		if (*c) {
+			*c = replacement;
+		}
+	}
+
+	return string;
+}
diff --git a/lib/misc.h b/lib/misc.h
index 68b63155..73f71e85 100644
--- a/lib/misc.h
+++ b/lib/misc.h
@@ -149,5 +149,6 @@ G_MODULE_EXPORT char **split_command_parts(char *command, int limit);
 G_MODULE_EXPORT char *get_rfc822_header(const char *text, const char *header, int len);
 G_MODULE_EXPORT int truncate_utf8(char *string, int maxlen);
 G_MODULE_EXPORT gboolean parse_int64(char *string, int base, guint64 *number);
+G_MODULE_EXPORT char *str_reject_chars(char *string, const char *reject, char replacement);
 
 #endif
diff --git a/otr.c b/otr.c
index 201aa816..4888691a 100644
--- a/otr.c
+++ b/otr.c
@@ -750,14 +750,9 @@ void op_create_instag(void *opdata, const char *account, const char *protocol)
 	}
 }
 
-static char *otr_filter_colors(char *msg) {
-	int i;
-	for (i = 0; msg[i]; i++) {
-		if (msg[i] == '\x02' || msg[i] == '\x03') {
-			msg[i] = '?';
-		}
-	}
-	return msg;
+static char *otr_filter_colors(char *msg)
+{
+	return str_reject_chars(msg, "\x02\x03", '?');
 }
 
 /* returns newly allocated string */