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global-functions: add $GetRandom

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This commit is contained in:
Christian Hesse 2019-07-26 17:48:03 +02:00
parent 25a22e2e1c
commit f49b67f5e7
1 changed files with 13 additions and 0 deletions
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13
global-functions
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@ -245,3 +245,16 @@
}
:return $Result;
}
# generate random number
# Warning: This is a *very* weak algorithm and in *no way*
# useful for cryptography or similar!
:global GetRandom do={
:local Max ([ :tonum $1 ] + 1);
:local Sum 0;
:foreach Interface in=[ /interface find ] do={
:set Sum ($Sum + [ /interface get $Interface tx-byte ]);
}
:return ($Sum % $Max);
}