1 files changed, 88 insertions, 0 deletions

diff --git a/old-school/squashfs-size b/old-school/squashfs-size
new file mode 100755
index 0000000..74b67d7
--- /dev/null
+++ b/old-school/squashfs-size
@@ -0,0 +1,88 @@
+#!/bin/sh
+
+squashfs_size_ratio()
+{
+  local fn="$1"
+  #FSIZE="$(stat -c "%s" "$fn")"
+  word5() { echo $5; }
+  FSIZE="$(word5 `ls -l "$fn"`)"
+  echo $(( $FSIZE * 3367 / 1000 ))
+}
+
+squashfs_size_magicdb()
+{
+
+  get()
+  {
+    local len=$1
+    local off=$2
+    local fn="$3"
+    #local OUT=( $(od -t d$len -N$len -j $off "$fn") )
+    #echo "${OUT[1]}"
+    od -t u$len -N$len -j $off "$fn" | head -n1 |  sed 's/.* //'
+  }
+
+#   getReversedEndian()
+#   {
+#     local len=$1
+#     local off=$2
+#     local fn="$3"
+#     #local B=( $(od -t x$len -N$len -j $off "$fn") )
+#     #B="${B[1]}"
+#     local B="$(od -t x$len -N$len -j $off "$fn" | head -n1 | cut -d' ' -f2)" 
+#     local D=
+#     local C=$(( $len * 2 ))
+#     while [ $C -gt 0 ]
+#     do
+#       C=$(( $C - 2 ))
+#       D="$D${B:$C:2}"
+#     done
+#     D="0x$D"
+#     echo $D
+#   }
+  getReversedEndian()
+  {
+    local len=$1
+    local off=$2
+    local fn="$3"
+    local D=
+    local C=$len 
+    while [ $C -gt 0 ]
+    do
+      C=$(( $C - 1 ))
+      D="$(od -t x1 -N1 -j $(($off+$C)) "$fn" | head -n1 | cut -d' ' -f2)$D" 
+    done
+    D=$((0x$D))
+    echo $D
+  }
+
+
+  local fn="$1"
+
+  local M=$(get 4 0 "$fn")
+  local N=$(getReversedEndian 4 0 "$fn")
+  if [ $M -eq 1936814952 ]
+  then
+    # Proper endian.
+    local get=get
+  elif [ $N -eq 1936814952 ]
+  then
+    # Reversed endian.
+    local get=getReversedEndian
+  else
+    error not squashfs
+  fi
+
+  local T=$($get 2 28 "$fn")
+  if [ $T -lt 3 ]
+  then
+    local BC=$($get 4 8 "$fn") 
+  else
+    local BC=$($get 8 63 "$fn")
+  fi
+
+  echo $BC
+}
+
+
+squashfs_size_ratio "$1"