BARIX Streaming Client Guia de Instalação descarregar pdf (Página 45)

Boolean expressions

A single boolean operators can be used in conditional execution (see the Test

command above).

A boolean operator has a name: a small letter, and its parameters enclosed in

brackets. The parameters of a boolean operator are either integer or string

constants or variables. Optionally, a boolean expression can be prefixed with the

exclamation mark ('!', ASCII 0x21) for the logical NOT function.

m(f,n) - n-th message in file f exists

• similar to the Print Message command M(f,n) above

• tests if a FLASH message file (e.g. channels.ini) contains a non-empty message

on the line number n; the top line in the file has the number 0

• is TRUE if the message exists and is non-empty, otherwise is FALSE

p(s) - string is empty

• accepts one string parameter

• is TRUE if the string is empty, otherwise is FALSE

z(i) - integer is zero

• accepts one integer parameter

• is TRUE if the integer is zero, otherwise is FALSE

g(i1,i2) - i1>i2

• accepts two integer parameters i1 and i2

• is TRUE if i1 is greater than i2, otherwise is FALSE

e(i1,i2) - i1=i2

• accepts two integer parameters i1 and i2

• is TRUE if i1 equals to i2, otherwise is FALSE

t(i1,i2) - i1>=i2

• accepts two integer parameters i1 and i2

• is TRUE if i1 is greater or equals to i2, otherwise is FALSE

Variables

Variables are indexed, a separate indexing for integer and string variables is used.

Integer variables are prefixed with a small 'i' letter (ASCII 0x69) followed by the

variable index (starting from 0). String variables are prefixed with a small 's' letter

(ASCII 0x73) followed by the variable index. E.g. 'i12' or 's4'

The following string variables are defined:

ID Description

s0 Device's IP address as a string; e.g. “192.168.1.2”

s1 The current song name and radio station name obtained from meta tags

The following integer variables are defined:

ID Description

i0 The player status: 0=idle, 1=tuning, 2=playing

i1 non-zero if priority message is being played, otherwise 0

i2 1 if the device is in stand-by mode, otherwise 0

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BARIX Streaming Client Guia de Instalação Página 45