[ES40-developers] Patch: Configurator syntax checking

[brian w. <bdw...@in...>]

This is basically the Configurator.cpp that I sent the other day, except
in patch form.

Here's how it works:
On the first pass (parent==0) the file is stripped down to the
essentials and the c-comments, strings, and braces are checked to verify
they are closed correctly.  

My configuration file is turned into this string:

gui=sdl{keyboard.use_mapping=false;keyboard.map="keys.map";}
sys0=tsunami{rom.srm="../rom/cl67srmrom.exe";rom.decompressed="../rom/decompressed.rom";
rom.flash="../rom/flash.rom";rom.dpr="../rom/dpr.rom";memory.bits=30;
cpu0=ev68cb{icache=false;}pci0.7=ali{mouse.enabled=true;lpt.outfile="lpt.out";
vga_console=true;}pci0.15=ali_ide{disk0.0=file{file="../img/scratch.dsk";
read_only=false;cdrom=false;}disk1.0=file{file="../img/alphacd-3.1.1.iso";
read_only=true;cdrom=true;}}pci0.19=ali_usb{}pci0.2=cirrus{
rom="../rom/vgabios-0.6a.debug.bin";}pci0.3=sym53c810{}serial0=serial{port=21264;
action="xterm -e telnet localhost 21264";}}

When all of the whitespace and comments are removed, the configuration
parser becomes much simpler:  state transitions are direct (instead of
having to go through a 'done' phase, and no syntax checking is required
since the first pass already took care of it.

Brian