From b1eaebd9057e1a19f826b8da00d948235f9ca9df Mon Sep 17 00:00:00 2001
From: fujr <fjrcn@outlook.com>
Date: Thu, 19 Dec 2024 15:50:28 +0800
Subject: [PATCH] enhance rate conversion function

---
 .../root/usr/share/qmodem/generic.sh          | 23 ++++++++++++++-----
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/luci/luci-app-qmodem/root/usr/share/qmodem/generic.sh b/luci/luci-app-qmodem/root/usr/share/qmodem/generic.sh
index d93f513..d8dcd4c 100755
--- a/luci/luci-app-qmodem/root/usr/share/qmodem/generic.sh
+++ b/luci/luci-app-qmodem/root/usr/share/qmodem/generic.sh
@@ -350,13 +350,24 @@ get_reboot_caps()
 
 rate_convert()
 {
+    #check if bc is installed
+    is_bc_installed=$(which bc)
     local rate=$1
     rate_units="bps Kbps Mbps Gbps"
-    for i in $(seq 0 3); do
-        if [ $rate -lt 1024 ]; then
-            break
-        fi
-        rate=$(($rate / 1024))
-    done
+    if [ -z "$is_bc_installed" ]; then
+        for i in $(seq 0 3); do
+            if [ $rate -lt 1024 ]; then
+                break
+            fi
+            rate=$(($rate / 1024))
+        done
+    else
+        for i in $(seq 0 3); do
+            if [ $(echo "$rate < 1024" | bc) -eq 1 ]; then
+                break
+            fi
+            rate=$(echo "scale=2; $rate / 1024" | bc)
+        done
+    fi
     echo "$rate `echo $rate_units | cut -d ' ' -f $(($i+1))`"
 }