open my $fh,"<","regexp.h" or die "Can't read regexp.h: $!";
my %rxfv;
+my %definitions; # Remember what the symbol definitions are
my $val = 0;
my %reverse;
while (<$fh>) {
- if (/#define\s+(RXf_\w+)\s+(0x[A-F\d]+)/i) {
- my $newval = eval $2;
- if($val & $newval) {
- die sprintf "Both $1 and $reverse{$newval} use %08X", $newval;
- }
+
+ # optional leading '_'. Return symbol in $1, and strip it from
+ # rest of line
+ if (s/ \#define \s+ ( _? RXf_ \w+ ) \s+ //xi) {
+ chomp;
+ my $define = $1;
+ s: / \s* \* .*? \* \s* / : :x; # Replace comments by a blank
+
+ # Replace any prior defined symbols by their values
+ foreach my $key (keys %definitions) {
+ s/\b$key\b/$definitions{$key}/g;
+ }
+ my $newval = eval $_; # Get numeric definition
+
+ $definitions{$define} = $newval;
+
+ if($val & $newval) {
+ die sprintf "Both $define and $reverse{$newval} use %08X", $newval;
+ }
$val|=$newval;
- $rxfv{$1}= $newval;
- $reverse{$newval} = $1;
+ $rxfv{$define}= $newval;
+ $reverse{$newval} = $define;
}
}
my %vrxf=reverse %rxfv;