Table 2.2 escape sequences – Teledyne LeCroy LeCroy Analyzers File Based Decoding Manual User Manual

Page 10

Chapter 2: Values

File-based Decoding User Manual

LeCroy Corporation

Escape Sequences

These are the available escape sequences in CSL:

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.
The 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

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: \\"

This is a backslash: \

double
quote

"\"Quotes!\""

"Quotes!"

horizontal
tab

"Before tab\tAfter tab"

Before tab

After tab

newline

"This is how\nto get a newline."

This is how
to get a newline.

single quote

"\'Single quote\'"

'Single quote'

Table 2.2 Escape Sequences