Here is some similar code that I wrote a while ago as part of Spreadsheet::WriteExcel::Utility. The code is verbatim although I was tempted to take out some of the parentheses:
# Convert base26 column string to number
# All your Base are belong to us.
my @chars = split //, $col;
my $expn = 0;
$col = 0;
while (@chars) {
my $char = pop(@chars); # LS char first
$col += (ord($char) -ord('A') +1) * (26**$expn);
$expn++;
}
As an aside. Any particular reason for using POSIX::pow()?
And as another aside the POSIX strtol() function will convert base 26 (or bases from 2 to 36) to base 10, although not for this base 26 format.
--
John.
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