Experimental Physics and
Industrial Control System

Dirk Zimoch via Core-talk <core-talk at aps.anl.gov> · Mon, 27 Jul 2020 07:52:40 -0000

\x should definitely limit itself to 2 hex digits.

Is is worth the effort to pre-process the strings and translate e.g.
\033 to \x1b and \a to \x07 so the json parser understands it? Problem
is that the string may become longer and thus replacement cannot be done
in-place.

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https://bugs.launchpad.net/bugs/1783475

Title:
  const link support can't handle escaped charactors

Status in EPICS Base:
  Triaged
Status in EPICS Base 3.16 series:
  Won't Fix
Status in EPICS Base 7.0 series:
  Triaged

Bug description:
  I think the following should work, but it doesn't.  The culprit seems
  to be the call to dbTranslateEscape() in dbRecordField() and
  dbRecordInfo().  The escaped newline is handled correctly by dbLex,
  but the later dbJLinkParse() errors on the now unescaped newline.

  > record(stringin, "test") {
  >      field(INP, {const:"multi\nline"})
  > }

  > dbJLinkInit: lexical error: invalid character inside string.
  >                          {"const":"multi line"}
  >                      (right here) ------^

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System