Experimental Physics and
Industrial Control System

mdavidsaver via Core-talk <core-talk at aps.anl.gov> · Tue, 09 Nov 2021 15:16:51 -0000

I hadn't known about '%i' with scanf().

Are you (Dirk) going to create a github PR so that new test case is run
through CI?

Have you investigated portability?  Is '%i' mentioned in the C89 spec.?

A quick search finds that '%i' is documented by MS [1].  And [2] claims
it is "... supported by the latest C and C++ standards (both published
in 2011) ...".  So this looks fine going forward.

[1] https://docs.microsoft.com/en-us/cpp/c-runtime-library/scanf-type-field-characters?view=msvc-170
[2] https://www.cplusplus.com/reference/cstdio/scanf/?kw=scanf

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https://bugs.launchpad.net/bugs/1950300

Title:
  Cannot use hex numbers in HW links in EPICS 7

Status in EPICS Base:
  New

Bug description:
  In EPICS 3.14.12, it was possible to use hex numbers in hardware links
  of type VME_IO and others like "#C0 S0x8b". (The parser used the
  function cvtDecimalOrHexToShort for this.) In EPICS 7 this does not
  work any longer because the string is parsed with %d instead of %i. As
  many of our existing IOCs use hex numbers here, this makes transition
  to EPICS 7 unnecessary hard.

  Changing to %i will allow hex numbers, but will also allow octal
  numbers.  That may a problem as C011 uses to mean 11 in 3.14, not 9.

  In that case, parsing with a single sscanf is not sufficient.

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System