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patrickm
Senior Member
Joined: February 22 2007
Location: United States
Online Status: Offline
Posts: 188
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| Posted: July 25 2013 at 10:31 | IP Logged
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I am trying to write some macros that use case statements
to read and write some variables. If I hard code the
variable name it works fine.
ph_setglobal_s("SB_STATE_1", case("{SB_MODE_1}" when
"play" then"2" when "pause" then "3" when "stop" then
"0"))
What I would like to do is access the variables in a
loop counter.
ph_setglobal_s("SB_STATE_" + "[LOCAL9]", case("SB_MODE_"
+ "[LOCAL9]"
when "play" then"2" when "pause" then "3" when "stop"
then "0"))
That returns a zero but the variable doesn't change.
What is the correct way of doing this?
Thanks
Patrick
Edited by patrickm - July 25 2013 at 10:34
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dhoward
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Joined: June 29 2001
Location: United States
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Posts: 4447
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| Posted: July 25 2013 at 11:49 | IP Logged
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Patrick,
You can simplify the code a little bit by using this:
ph_setglobal_s("SB_STATE_[LOCAL9]", case("SB_MODE_[LOCAL9]"
when "play" then"2" when "pause" then "3" when "stop"
then "0"))
If [LOCAL9] contains a value of 3, then after the substitution, our statement to be evaluated will look like this:
ph_setglobal_s("SB_STATE_3", case("SB_MODE_3"
when "play" then"2" when "pause" then "3" when "stop"
then "0"))
Herein lies actual problem. The case statement is now switching on the string value "SB_MODE_3" and not what is actually contained in the global variable SB_MODE_3. You could try to use variable substitution to handle this (like in your first statement) by using something like this:
case("{SB_MODE_[LOCAL9]}" when...
but it wont work and that kind of substitution gets ugly.
To fix it, use this:
ph_setglobal_s("SB_STATE_[LOCAL9]", case(ph_getglobal_s("SB_MODE_[LOCAL9]")
when "play" then"2" when "pause" then "3" when "stop"
then "0"))
I tested this and it works.
Hope this helps,
Dave.
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patrickm
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Joined: February 22 2007
Location: United States
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Posts: 188
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| Posted: July 25 2013 at 13:27 | IP Logged
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Dave,
Thanks for the explanation.
Patrick
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Topic: Set variable value in case statement
