add min/max macros

src/tc.c

@@ -44,13 +44,18 @@
 #include "tc.h"
 
 
+/**
+ * Limit upload/download rate for a client using traffic control via IFB (Intermediate Functional Block).
+ */
+
+
 int
 tc_attach_client(const char down_dev[], int download_limit, const char up_dev[], int upload_limit, int idx, const char ip[])
 {
 	int rc = 0;
 	s_config *config = config_get_config();
-	int dlimit = (download_limit < config->download_limit ? download_limit : config->download_limit);
-	int ulimit = (upload_limit < config->upload_limit ? upload_limit : config->upload_limit);
+	int dlimit = MIN(download_limit, config->download_limit);
+	int ulimit = MIN(upload_limit, config->upload_limit);
 	int id = 3 * idx + 10;
 
 	if (dlimit > 0) {

src/util.h

@@ -26,6 +26,9 @@
 #ifndef _UTIL_H_
 #define _UTIL_H_
 
+#define MIN(X, Y) (((X) < (Y)) ? (X) : (Y))
+#define MAX(X, Y) (((X) > (Y)) ? (X) : (Y))
+
 /* @brief Execute a shell command */
 int execute(const char fmt[], ...);
 int execute_ret(char* msg, int msg_len, const char fmt[], ...);