[Freeswitch-docs] Current Progress on Variables

Ryan Harris ryharris at airmail.cc
Fri Feb 16 19:39:04 UTC 2018

On 02/16/2018 01:56 PM, Stanislav Sinyagin wrote:
> But many variables don't have #define statements and are used as
> literal strings in the code.

To clarify, the strings are the first thing I did. The regex is pretty
simple, although it will need some verification to make sure it's
matching everything:

var_expr =

Then for the #define:

cpp_expr = r'#define (?P<const>.+) (?P<val>.+)'

First we pass over the whole source, headers and c source files
included, looking for defines to create a "database" with the constants.
Then we do a second pass matching on var_expr. It finds about ~1400
matches. If the variable is a string literal (we check for the presence
of '"'), it gets stored in a "variable database" with references to the
source file and line. If it's not surrounded by quotes, then we try to
check if it's a constant. If that's the case, then we add that variable
to our variable database (also with source file and line).

Finally, the left overs... about 50 are marked as needing review. I have
to investigate those.

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