Parses a string containing debugging options
into a guint containing bit flags. This is used
within GDK and GTK+ to parse the debug options passed on the
command line or through environment variables.
If string is equal to "all", all flags are set. Any flags
specified along with "all" in string are inverted; thus,
"all,foo,bar" or "foo,bar,all" sets all flags
except those corresponding to "foo" and "bar".
If string is equal to "help", all the available keys in keys
are printed out to standard error.
Parses a string containing debugging options into a guint containing bit flags. This is used within GDK and GTK+ to parse the debug options passed on the command line or through environment variables. If string is equal to "all", all flags are set. Any flags specified along with "all" in string are inverted; thus, "all,foo,bar" or "foo,bar,all" sets all flags except those corresponding to "foo" and "bar". If string is equal to "help", all the available keys in keys are printed out to standard error.