powershell regular expression - extract function names C source program

Question

I need to extract the names of functions defined in a C source file given as parameter to the script. I'm not very familiar to PowerShell but shouldn't be something like this:

If ($FileExists -eq $True)
{
     select-string $args[0] -pattern "\(void\|double\|char\|int\) \.*(.*)"
}

I shouldn't have escaped the characters so-> select-string $args[0] -pattern "(void|double|char|int) \.*(.*)" works but how can I refer the name of the function only (something like linux-sed would be useful) — 55651909-089b-4e04-9408-47c5bf
– 55651909-089b-4e04-9408-47c5bf, Commented Apr 22, 2012 at 20:59

Andy Arismendi · Accepted Answer · 2012-04-22 22:43:51Z

2

I'd define the list of file extensions that you want to search in and use them in the Include parameter, then pipe to select-string and extract the capturing group matches.

dir -Path C:\c-program -Include *.h, *.c -Recurse | Select-String -Pattern '(void|double|char|int) (\w+)\(' | % {$_.Matches[0].Groups[2].Value}

Here's a canned example using function names from wikipedia:

'void incInt(int *y)','int main(int argc, char* args[])','int subtract(int x, int y)' | Select-String -Pattern '(void|double|char|int) (\w+)\(' | % {$_.Matches[0].Groups[2].Value}

edited Apr 22, 2012 at 22:43

answered Apr 22, 2012 at 22:33

Andy Arismendi

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