Experimental Physics and Industrial Control System
The guard is not strictly necessary. StreamDevice will not overrun the buffer.
In recent versions I have improved string scanning: for example "%#s" reads strings containing white space.
But maybe you want to do more parsing:
in "user,%d,%(\$1)s";
This in an I/O Intr scanned record fetches the number whenever a line starting with "user," is received and sends the last part to a different record.
Dirk
Gruss
Dirk
> Am 18.05.2017 um 17:22 schrieb Jeong Han Lee <[email protected]>:
>
> Hi Eric,
>> On 05/18/2017 05:08 PM, Eric Norum wrote:
>> To guard against buffer overrun issues it’s best to specify a maximum
>> length in the protocol entry:
>> read_raw
>> {
>> in “%39c";
>> }
>
> Thanks for your comments.
>
>>
>> Or, if the input terminator is set to a single ‘\r’ or ‘\n’ and the
>> device sends a "\r\n” you could use:
>> read_raw
>> {
>> in “%39[^\r\n]";
>> }
>>
> By the way, I have the terminator in "st.cmd" as follows:
>
> asynOctetSetInputEos("L0", 0, "\r\n")
>
> Thanks,
> Han
>
>
>>
>>> On May 18, 2017, at 6:37 AM, Jeong Han Lee <[email protected]
>>> <mailto:[email protected]>> wrote:
>>>
>>> I have the bar code scanner, so, the string input is the arbitrary
>>> ascii and numbers from bar codes, generated by myself, whenever I scan
>>> it.
>>>
>>> For example,
>>>
>>> case 1 : user,123456789,U002C007
>>> case 2 : ABCDEFGHIZ0123456789
>>> case 3 : office,248795493,M01B21
>>> case 4 : ....
>>>
>>> case N : SUBMIT
>>>
>>> Note that case 1..N-1 can be done without order.
>>>
>>> The scanner has a typical RS232 connection. I wrote the very simple
>>> IOC with asyn and Stream. It has only one record and one function in
>>> db and proto file as follows:
>>>
>>> --- snip snip ---
>>>
>>> record(stringin, "$(SYSDEV)RawScanData")
>>> {
>>> field(DESC, "RAW Scanned data")
>>> field(DTYP, "stream")
>>> field( INP, "@scanner.proto read_raw $(PORT)")
>>> field(SCAN, "I/O Intr")
>>> field(PINI, "YES")
>>> }
>>>
>>> read_raw
>>> {
>>> in "%s";
>>> }
>>> --- snip snip ----------
>>>
>>> Is this enough?
>>>
>>> Thanks,
>>> Han
>>
>> --
>> Eric Norum
>> [email protected] <mailto:[email protected]>
>>
>>
>>
>>
- Replies:
- Re: string fanout or stringout after conditional check? Eric Norum
- Re: string fanout or stringout after conditional check? Jeong Han Lee
- References:
- string fanout or stringout after conditional check? Jeong Han Lee
- Re: string fanout or stringout after conditional check? Ralph Lange
- Re: string fanout or stringout after conditional check? Jeong Han Lee
- Re: string fanout or stringout after conditional check? Eric Norum
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