(List
  (If
    (AndOr OP_OR_IF
      (Com {[LIT_OTHER "["]} {[LIT_OTHER "!"]} {[LIT_CHARS -f]} {[DQ [VarSub 1]]} {[LIT_OTHER "]"]})
      (AndOr OP_OR_IF
        (Subshell
          (AndOr OP_AND_IF
            (Com {[LIT_OTHER "["]} {[LIT_OTHER "!"]} {[LIT_CHARS -z]} {[DQ [VarSub 2]]} {[LIT_OTHER "]"]})
            (Com {[LIT_OTHER "["]} {[LIT_OTHER "!"]} {[LIT_CHARS -f]} {[DQ [VarSub 2]]} {[LIT_OTHER "]"]})
          )
        )
        (Subshell
          (AndOr OP_AND_IF
            (Com {[LIT_OTHER "["]} {[LIT_OTHER "!"]} {[LIT_CHARS -z]} {[DQ [VarSub 3]]} {[LIT_OTHER "]"]})
            (Com {[LIT_OTHER "["]} {[LIT_OTHER "!"]} {[LIT_CHARS -f]} {[DQ [VarSub 3]]} {[LIT_OTHER "]"]})
          )
        )
      )
    )
    (List
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Usage: trximg.sh file1 [file2 [file3]]"]]}
        <
        (DescriptorRedirectNode target={[LIT_CHARS 2]} <REDIR_GREATAND ">&"> 1),
        >
      )
      (Com {[LIT_CHARS exit]} {[LIT_CHARS 1]})
    )
  )
  (FunctionDef leout []
    (List
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('X', {[LIT_CHARS 0]})])
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('DATA', {[VarSub 2]})])
      (While
        (Com {[LIT_OTHER "["]} {[VarSub X]} {[LIT_CHARS -lt]} {[VarSub 1]} {[LIT_OTHER "]"]})
        (List
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('BYTE', {[ArithSub {A2 AS_OP_PERCENT {A Atom NODE_ARITH_WORD {[VarSub DATA]}} {A Atom NODE_ARITH_WORD {[AS_NUM_LITERAL 256]}}}]})])
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('DATA', {[ArithSub {A2 AS_OP_SLASH {A Atom NODE_ARITH_WORD {[VarSub DATA]}} {A Atom NODE_ARITH_WORD {[AS_NUM_LITERAL 256]}}}]})])
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('OCTAL', {[DQ ]})])
          (For i [{[LIT_CHARS 1]}, {[LIT_CHARS 2]}, {[LIT_CHARS 3]}])
            (List
              (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('OCTAL', {[ArithSub {A2 AS_OP_PERCENT {A Atom NODE_ARITH_WORD {[VarSub BYTE]}} {A Atom NODE_ARITH_WORD {[AS_NUM_LITERAL 8]}}}] [DQ [VarSub OCTAL]]})])
              (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('BYTE', {[ArithSub {A2 AS_OP_SLASH {A Atom NODE_ARITH_WORD {[VarSub BYTE]}} {A Atom NODE_ARITH_WORD {[AS_NUM_LITERAL 8]}}}]})])
            )
          )
          (Com {[LIT_CHARS echo]} {[LIT_CHARS -ne]} {[DQ [\ LIT_ESCAPED_CHAR "\\0"][VarSub OCTAL]]})
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('X', {[ArithSub {A2 AS_OP_PLUS {A Atom NODE_ARITH_WORD {[VarSub X]}} {A Atom NODE_ARITH_WORD {[AS_NUM_LITERAL 1]}}}]})])
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('BYTE', {[VarSub x]})])
        )
      )
    )
  )
  (FunctionDef padlen []
    (Com {[LIT_CHARS echo]} {[ArithSub {A2 AS_OP_PERCENT {A2 AS_OP_MINUS {A Atom NODE_ARITH_WORD {[VarSub 1]}} {A2 AS_OP_PERCENT {A Atom NODE_ARITH_WORD {[VarSub 2]}} {A Atom NODE_ARITH_WORD {[VarSub 1]}}}} {A Atom NODE_ARITH_WORD {[VarSub 1]}}}]})
  )
  (FunctionDef roundlen []
    (Com {[LIT_CHARS echo]} {[ArithSub {A2 AS_OP_PLUS {A Atom NODE_ARITH_WORD {[VarSub 2]}} {A Atom NODE_ARITH_WORD {[ComSub (Com {[LIT_CHARS padlen]} {[VarSub 1]} {[VarSub 2]})]}}}]})
  )
  (FunctionDef filelen []
    (Pipeline
      (Com {[LIT_CHARS wc]} {[LIT_CHARS -c]} {[DQ [VarSub 1]]})
      (Com {[LIT_CHARS awk]} {[SQ <LIT_CHARS "{print $1}">]})
    )
  )
  (FunctionDef zpad []
    (AndOr OP_AND_IF
      (Com {[LIT_OTHER "["]} {[VarSub 1]} {[LIT_CHARS -ne]} {[LIT_CHARS 0]} {[LIT_OTHER "]"]})
      (Com {[LIT_CHARS dd]} {[LIT_VAR_LIKE "if="] [LIT_CHARS /dev/zero] =} {[LIT_VAR_LIKE "bs="] [VarSub 1] =} {[LIT_VAR_LIKE "count="] [LIT_CHARS 1] =}
        <
        (FilenameRedirectNode filename={[LIT_CHARS /dev/null]} <REDIR_GREAT "2>"> 2),
        >
      )
    )
  )
  (FunctionDef zpad_file []
    (List
      (AndOr OP_AND_IF
        (Com {[LIT_OTHER "["]} {[LIT_CHARS -z]} {[DQ [VarSub 2]]} {[LIT_OTHER "]"]})
        (Com {[LIT_CHARS return]})
      )
      (Com {[LIT_CHARS cat]} {[VarSub 2]})
      (Com {[LIT_CHARS zpad]} {[ComSub (Com {[LIT_CHARS padlen]} {[VarSub 1]} {[ComSub (Com {[LIT_CHARS filelen]} {[DQ [VarSub 2]]})]})]})
    )
  )
  (FunctionDef emit_header []
    (List
      (If
        (Com {[LIT_OTHER "["]} {[LIT_CHARS -z]} {[DQ [VarSub 1]]} {[LIT_OTHER "]"]})
        (List
          (Com {[LIT_CHARS echo]} {[LIT_CHARS -n]} {[DQ [LIT_CHARS HDR0]]})
          (Com {[LIT_CHARS leout]} {[LIT_CHARS 4]} {[VarSub LENGTH]})
          (Com {[LIT_CHARS leout]} {[LIT_CHARS 4]} {[VarSub CRC32]})
        )
      )
      (Com {[LIT_CHARS leout]} {[LIT_CHARS 2]} {[LIT_CHARS 0]})
      (Com {[LIT_CHARS leout]} {[LIT_CHARS 2]} {[LIT_CHARS 1]})
      (Com {[LIT_CHARS leout]} {[LIT_CHARS 4]} {[LIT_CHARS 28]})
      (Com {[LIT_CHARS leout]} {[LIT_CHARS 4]} {[VarSub OFFSET2]})
      (Com {[LIT_CHARS leout]} {[LIT_CHARS 4]} {[VarSub OFFSET3]})
    )
  )
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('TOTAL', {[ArithSub {A2 AS_OP_PLUS {A Atom NODE_ARITH_WORD {[AS_NUM_LITERAL 28]}} {A Atom NODE_ARITH_WORD {[ComSub (Com {[LIT_CHARS roundlen]} {[LIT_CHARS 4]} {[ComSub (Com {[LIT_CHARS filelen]} {[DQ [VarSub 1]]})]})]}}}]})])
  (If
    (Com {[LIT_OTHER "["]} {[LIT_CHARS -z]} {[DQ [VarSub 2]]} {[LIT_OTHER "]"]})
    (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('OFFSET2', {[LIT_CHARS 0]})])
    (ElseTrue)
    (List
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('OFFSET2', {[VarSub TOTAL]})])
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('TOTAL', {[ArithSub {A2 AS_OP_PLUS {A Atom NODE_ARITH_WORD {[VarSub TOTAL]}} {A Atom NODE_ARITH_WORD {[ComSub (Com {[LIT_CHARS roundlen]} {[LIT_CHARS 4]} {[ComSub (Com {[LIT_CHARS filelen]} {[DQ [VarSub 2]]})]})]}}}]})])
    )
  )
  (If
    (Com {[LIT_OTHER "["]} {[LIT_CHARS -z]} {[DQ [VarSub 3]]} {[LIT_OTHER "]"]})
    (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('OFFSET3', {[LIT_CHARS 0]})])
    (ElseTrue)
    (List
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('OFFSET3', {[VarSub TOTAL]})])
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('TOTAL', {[ArithSub {A2 AS_OP_PLUS {A Atom NODE_ARITH_WORD {[VarSub TOTAL]}} {A Atom NODE_ARITH_WORD {[ComSub (Com {[LIT_CHARS roundlen]} {[LIT_CHARS 4]} {[ComSub (Com {[LIT_CHARS filelen]} {[DQ [VarSub 3]]})]})]}}}]})])
    )
  )
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('LENGTH', {[ComSub (Com {[LIT_CHARS roundlen]} {[LIT_CHARS 4096]} {[VarSub TOTAL]})]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('CRC32', {[ComSub (Pipeline (Subshell (List (Com {[LIT_CHARS emit_header]} {[LIT_CHARS skip]}) (Com {[LIT_CHARS zpad_file]} {[LIT_CHARS 4]} {[DQ [VarSub 1]]}) (Com {[LIT_CHARS zpad_file]} {[LIT_CHARS 4]} {[DQ [VarSub 2]]}) (Com {[LIT_CHARS zpad_file]} {[LIT_CHARS 4]} {[DQ [VarSub 3]]}) (Com {[LIT_CHARS zpad]} {[ComSub (Com {[LIT_CHARS padlen]} {[LIT_CHARS 4096]} {[VarSub TOTAL]})]}) ) ) (Com {[LIT_CHARS cksum]} {[LIT_CHARS -NILP]}) )]})])
  (Com {[LIT_CHARS emit_header]})
  (Com {[LIT_CHARS zpad_file]} {[LIT_CHARS 4]} {[DQ [VarSub 1]]})
  (Com {[LIT_CHARS zpad_file]} {[LIT_CHARS 4]} {[DQ [VarSub 2]]})
  (Com {[LIT_CHARS zpad_file]} {[LIT_CHARS 4]} {[DQ [VarSub 3]]})
  (Com {[LIT_CHARS zpad]} {[ComSub (Com {[LIT_CHARS padlen]} {[LIT_CHARS 4096]} {[VarSub TOTAL]})]})
)