[Boost-build] Win32 registry functions

From: Bojan Resnik (resnikb_at_[hidden])
Date: 2006-09-08 03:44:13

   Sometimes, especially when needing to detect installed versions of
some third-party program, I need functions to enumerate registry
subkeys or registry values of a given key. I have written two new
builtin functions W32_REGKEYS and W32_REGVALUES which, given a
registry key path, return lists of its subkeys and values,
respectively.

Example:
    for local subkey in [ W32_REGKEYS "HKLM\\Software\\Microsoft" ]
    {
        ECHO $(subkey) ;
    }

    for local value in [ W32_REGVALUES "HKCU\\Environment" ]
    {
        ECHO $(value) ;
    }

Attached are patches to builtin.c and w32_getreg.c that add these new
functions to bjam.

-- 
Bojan Resnik