Experimental Physics and
Industrial Control System

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<== Date ==>		<== Thread ==>

Subject:	Re: Regex support in StreamDevice.
From:	"Li, Ji via Tech-talk" <tech-talk at aps.anl.gov>
To:	"Zimoch Dirk (PSI)" <dirk.zimoch at psi.ch>, "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date:	Fri, 13 May 2022 14:13:15 +0000

I don't see it in the IOC built with StreamDevice package, and I see it in the modified IOC (with manual compiled StreamDevice).

Best,

-Ji

From: Zimoch Dirk (PSI) <dirk.zimoch at psi.ch>
Sent: Friday, May 13, 2022 10:04
To: Li, Ji <liji at bnl.gov>; tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: AW: Regex support in StreamDevice.

Do you see %/ in dbior?

epics> dbior stream,1

Driver: stream

StreamDevice 2.8.22 2021-11-11 11:49:32 +0100

commit: 94721c2b0e2ae118778d5783bd35cc642f573f60

Use interest level 100 for license information

registered bus interfaces:

AsynDriverInterface

DebugInterface

DummyInterface

registered converters:

%/ RegexpConverter

%< ChecksumConverter

%B BinaryConverter

%D BCDConverter

%E StdDoubleConverter

%G StdDoubleConverter

%R RawFloatConverter

%T TimestampConverter

%X StdLongConverter

%[ StdCharsetConverter

%b BinaryConverter

%c StdCharsConverter

%d StdLongConverter

%e StdDoubleConverter

%f StdDoubleConverter

%g StdDoubleConverter

%i StdLongConverter

%m MantissaExponentConverter

%o StdLongConverter

%r RawConverter

%s StdStringConverter

%u StdLongConverter

%x StdLongConverter

%{ EnumConverter

connected records:

Von: Li, Ji <liji at bnl.gov>
Gesendet: Freitag, 13. Mai 2022 15:55
An: Zimoch Dirk (PSI) <dirk.zimoch at psi.ch>; tech-talk at aps.anl.gov
Betreff: Re: Regex support in StreamDevice.

Hi Dirk,

Thanks for the suggestion. The StreamDevice was installed from a prebuilt package and it seems to have PCRE linked:

----------------------------------------------------------------------

liji@xf04bm-maia:/epics/iocs/maia$ ldd bin/linux-x86_64/maia |grep stream

libstream.so => /usr/lib/epics/lib/linux-x86_64/libstream.so (0x00007f0139e55000)

liji@xf04bm-maia:/epics/iocs/maia$ ldd /usr/lib/epics/lib/linux-x86_64/libstream.so |grep pcre

libpcre2-8.so.0 => /lib64/libpcre2-8.so.0 (0x00007fecb0427000)

----------------------------------------------------------------------

Something must have broken. I compiled a seperate StreamDevice instance and rebuilt the IOC. Errors are gone. We will double check the StreamDevice package. Thanks.

Best,

-Ji

From: Zimoch Dirk (PSI) <dirk.zimoch at psi.ch>
Sent: Friday, May 13, 2022 2:28
To: Li, Ji <liji at bnl.gov>; tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: AW: Regex support in StreamDevice.

Hi Ji

It looks like PCRE (perl regular expressions) is not linked into StreamDevice.

Check your PCRE settings in RELEASE.

Be aware that from StreamDevice 2.7 to 2.8 I made some modifications to the Makefiles when searching for the configure directory to be more "standard EPICS compatible". In particular I look into the local configure first instead of an upper level configure. So maybe you need to copy some settings over?

Dirk

Von: Tech-talk <tech-talk-bounces at aps.anl.gov> Im Auftrag von Li, Ji via Tech-talk
Gesendet: Donnerstag, 12. Mai 2022 23:47
An: tech-talk at aps.anl.gov
Betreff: Regex support in StreamDevice.

Hi,

We have an IOC based on streamdevice which had been work well until it was recently updated to base 7.0.5 and StreamDevice 2.8.10. The IOC reported erros on startup:

----------------------------------------------------------------------

2022/05/12 17:20:06.024569 _main_ No converter registered for format '%/'

2022/05/12 17:20:06.024610 _main_ var.p line 398: in format string: "%/^(?|\"([^\"]*)\"|([^\"][^ ]*))/"

2022/05/12 17:20:06.024616 _main_ var.p line 398: in command 'in'

2022/05/12 17:20:06.024620 _main_ var.p line 395: in protocol 'var_g_string'

2022/05/12 17:20:06.024627 _main_ while compiling protocol 'var_g_string(position.dim[0].name,XFM:MAIA)' for 'XFM:MAIA:X_POS_DIM_NAME'

2022/05/12 17:20:06.024633 _main_ XFM:MAIA:X_POS_DIM_NAME: Protocol parse error

2022/05/12 17:20:06.024639 _main_ XFM:MAIA:X_POS_DIM_NAME: Record initialization failed

----------------------------------------------------------------------

It seems "%/^(?|\"([^\"]*)\"|([^\"][^ ]*))/" in protocol var_g_string could not be recognized as a regular _expression_.

The StreamDevice was built against PCRE package, and:

----------------------------------------------------------------------

liji@xf04bm-maia:/epics/iocs/maia$ ldd bin/linux-x86_64/maia | grep pcre

libpcre2-8.so.0 => /lib64/libpcre2-8.so.0 (0x00007fcd23fdb000)

----------------------------------------------------------------------

What could be preventing streamdevice from parsing protocols with regular expressions?

Best,

-Ji

References:: Regex support in StreamDevice. Li, Ji via Tech-talk; AW: Regex support in StreamDevice. Zimoch Dirk (PSI) via Tech-talk; Re: Regex support in StreamDevice. Li, Ji via Tech-talk; AW: Regex support in StreamDevice. Zimoch Dirk (PSI) via Tech-talk

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ANJ, 14 Sep 2022

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System