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Incoming String Parsing - String.Includes Method
alecg
Posts: 30
What is the best way to search for String within a String? This comes from my JavaScript projects, but I find it tremendously useful when dealing with highly chatty, and sometimes unreliable/over-innundated/un-buffered equipment connections.
Example:
char myString[30] = 'The quick brown fox jumped over the fence'
myBoolean = myString.Includes('fox jumped', 1)
myBoolean would evaluate as true in the above example. I've also seen indexOf used this way.
The problem is that some equipment I work with may report it's input state in any one of about 30 different response strings depending on how its being used. I could search for every single version of that dialog using COMPARE_STRING, even if I have to substitute '?', but sometime the Input starts at character[5], sometimes at character[35] and sometimes, not until after a stack of carriage returns (in which case I would create a string buffer and concatenate before evaluating).
Searching this way would also make the script more version resistant because the manufacturer could change/expand the response order, but I would still only be looking for that one small snippet of dialog relevant to my function.
Of course, as an AMX beginner, I'm probably just not fully understanding the capabilities of a certain command.
As always, any help or insight is very much appreciated!
Example:
char myString[30] = 'The quick brown fox jumped over the fence'
myBoolean = myString.Includes('fox jumped', 1)
myBoolean would evaluate as true in the above example. I've also seen indexOf used this way.
The problem is that some equipment I work with may report it's input state in any one of about 30 different response strings depending on how its being used. I could search for every single version of that dialog using COMPARE_STRING, even if I have to substitute '?', but sometime the Input starts at character[5], sometimes at character[35] and sometimes, not until after a stack of carriage returns (in which case I would create a string buffer and concatenate before evaluating).
Searching this way would also make the script more version resistant because the manufacturer could change/expand the response order, but I would still only be looking for that one small snippet of dialog relevant to my function.
Of course, as an AMX beginner, I'm probably just not fully understanding the capabilities of a certain command.
As always, any help or insight is very much appreciated!
0
Comments
I'll try it, thanks!
data_event[some_dev] { string : { local_var char dev_sample[64] while(find_string(dev_buffer,"cr",1)) { dev_sample = remove_string(dev_buffer,"cr",1) select { active(find_string(dev_sample,'brown',1)) : // do something active(find_string(dev_sample,'fox',1)) : // do something else active(find_string(dev_sample,'brown fox',1)) : // do some other thing } } }Note that with select - active, the first match wins. In the example above, the third active() will never run. If your device reliably terminates each message with a carriage return (or some other known string), even if some messages are otherwise null, this technique works well. I've been using it for years.
HTH.
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find_string can burn you at times though. With Denon receivers for instance, they can have a response of Stereo and 5 CH Stereo. If you use find_string for both responses, and the Stereo check is first, then the second one will never run when 5 CH Stereo is sent.
Paul
Exactly my point in saying that the third active() will never run. You have to watch the order in which you put them. I had this driven into my head years ago while coding for a projector that might respond to an input status query with 'video' or 'svideo'. If you put `active(find_string(foo,'video',1))` first, then the 'svideo' one never hits.
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I don't like it when order matters, so I try to avoid that. Instead of using find_string I just compare the text:
if (sResponse == 'Stereo')
else if (sResponse == '5 CH Stereo')
etc, although I usually use an array of strings rather than hard coding them like above.
Paul
Example:
Define_Constant char Input_Name[32][32]= { {'Bob'}, {'Sue'), etc. } DATA_EVENT[my_device] { STRING: { LOCAL_VAR Buffer[100] STACK_VAR received_string[100] WHILE (FIND_STRING (DATA.TEXT,"$0d",1)) { received_string = "Buffer, REMOVE_STRING (DATA.TEXT,"$0d",1)" CLEAR_BUFFER Buffer SELECT { ACTIVE (find_string(received_string, Input_Name, 1): { //***********LOGIC************* } } } }Would Find_String actually search the whole "Input_Name" array for a match?
If so, how would I know which member of the array returned a hit?
I'm doing this right now by simple running the entire Array thru a FOR "loop" and comparing each value, but this seems like an awful lot of work for the processor if there is a streamlined method.
Any thoughts?
Edit: removed code - didn't realize you said you were already looping.