It is similar to a string comparison (for string sorting) but unlike the usual
strncmp() or
strncasecmp() functions, when digits are encountered in a string, they are
converted to a number and
this is the number value which is taken in account for comparison.
I've written my own back then for the pin table, factored out into
eeschema/pin_number.cpp. This should be merged with the other
implementations then in the same process, and possibly generalized
(there is special treatment of "V" as a decimal point if it is placed
between numbers, for example, that may not always be appropriate).
Okay, I came up with a solution for which I'm not so sure if it would be
generally accepted: http://pastebin.com/Y7rVzHV1
It should compile as is.
The big part of that code is made off the class CONST_WX_STRING_VIEW,
which does nothing more than encapsulate a pair of wxString iterators,
dereferencing yields the beginning character, incrementing increments
the begin iterator etc. like in "ranges". I found such a range helper
immensely helpful for parsing generally, but it might be a bit bulky to
include only for StrNumCmp.
Simon, I tried to mimic the behaviour of your function, see the below
the comment "Gyros-Mode", I doubt that the float-parsing is particularly
clever however. Feel free to drop me compatible code that I could use
instead.
Cheers!
Michael
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