Re: Long string ...

[Ralph Lange <Ralph.Lange@bessy.de>]

 Hi Emmanuel,

On 27.09.2010 15:17, emmanuel_mayssat@lynceantech.com wrote:
> Pete,
>
> That doesn't seem to work either (at least with a stringout record)
>
> epics2@cr1com1 $ caput DMC2183:4:SO.VAL$ "111345678901234567890123456789012345678901234567890"
> Old : DMC2183:4:SO.VAL$ 40 84 80 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> New : DMC2183:4:SO.VAL$ 40 -1 80 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> [...]
>
> I am not sure how to read this, but the number 40 probably means that the stringout is limited to 40 chars.

As Nick already pointed out in his mail,

On 27.09.2010 04:43, nick.rees@diamond.ac.uk wrote:
>   * You need to be putting the data into a record field that is large
> enough to take the data. Hence, the stringOut record is still limited by
> the 40 character hard size of the field definition. If you are using
> stream device you can use a waveform record with a FTVL of CHAR or
> UCHAR. You can also use the asynRecord.

Let me rephrase that:
Even with the '$' long string modifier that the database understands in 
3.14.11, you will not be able to write more that 40 characters into a 
field that is only 40 characters long.
If your record has a string field that holds more than 40 characters or 
is an array of type CHAR with more than 40 elements (like the NAME field 
of all records, or the data fields of a properly configured waveform or 
asynRecord), you can use the '$' notation to read and write long 
strings. (Andrews remarks apply.)

Cheers,
Ralph