Teledyne-lecroy Protocol Analyzers File-Based Decoding User Manual Bedienungsanleitung PDF herunterladen (Seite 10)

Chapter 2: Values File-based Decoding User Manual

4 LeCroy Corporation

Escape Sequences

These are the available escape sequences in CSL:

\\ "This is a backslash: \\"

\" "\"Quotes!\""

\t "Before tab\tAfter tab"

\n "This is how\nto get a newline."

\' "\'Single quote\'"

Lists

A list can hold zero or more pieces of data. A list that contains zero pieces of data is called

an empty list. An empty list evaluates to false when used in an expression, whereas a

non-empty list evaluates to true. List literals are expressed using the square bracket (

[])

delimiters. List elements can be of any type, including lists.

[1, 2, 3, 4]

[]

["one", 2, "three", [4, [5, [6]]]]

Raw Bytes

Raw binary values are used primarily for efficient access to packet payloads. A literal

notation is supported using single quotes:

'00112233445566778899AABBCCDDEEFF'

This represents an array of 16 bytes with values starting at 00 and ranging up to 0xFF.

e values can only be hexadecimal digits. Each digit represents a nybble (four bits), and

if there are not an even number of nybbles specified, an implicit zero is added to the first

byte. For example:

'FFF'

is interpreted as

'0FFF'

null

null indicates an absence of valid data. The keyword null represents a literal null value

and evaluates to false when used in expressions.

result = null;

Character

Escape

Sequence Example Output

backslash This is a backslash: \

doub

quote

"Quotes!"

horizon

tal

tab

Before tab After tab

newl

ine This is how

to g

et a newline.

single quote 'Single quote'

Table 2.2 Escape Sequences

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 81 82

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