[syslinux:master] diag/geodsp: add mk-lba-img.pl

[syslinux-bot for Gene Cumm]

Commit-ID:  883746f41134920ba797f83552156006dc78da2e
Gitweb:     http://www.syslinux.org/commit/883746f41134920ba797f83552156006dc78da2e
Author:     Gene Cumm <gene.cumm at gmail.com>
AuthorDate: Sun, 24 Apr 2011 19:10:19 -0400
Committer:  Gene Cumm <gene.cumm at gmail.com>
CommitDate: Sat, 31 Dec 2011 23:08:27 -0500

diag/geodsp: add mk-lba-img.pl

To be used to replace the native C binary

---
 diag/geodsp/mk-lba-img.pl |   94 +++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 94 insertions(+), 0 deletions(-)

diff --git a/diag/geodsp/mk-lba-img.pl b/diag/geodsp/mk-lba-img.pl
new file mode 100755
index 0000000..59ef4f0
--- /dev/null
+++ b/diag/geodsp/mk-lba-img.pl
@@ -0,0 +1,94 @@
+## -----------------------------------------------------------------------
+##
+##   Copyright 2011 Gene Cumm
+##
+##   This program is free software; you can redistribute it and/or modify
+##   it under the terms of the GNU General Public License as published by
+##   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+##   Boston MA 02111-1307, USA; either version 2 of the License, or
+##   (at your option) any later version; incorporated herein by reference.
+##
+## -----------------------------------------------------------------------
+
+##
+## mk-lba-img.pl
+##
+## Make an image where each sector contains the LBA of the sector with
+## a head of an input file.
+##
+
+# use bytes;
+
+use constant SECTOR_SIZE => 512;
+use constant LBA_SIZE => 8;
+use constant LONG_SIZE => 4;
+use constant NUM_SECTORS => (256*63+1);
+# use constant NUM_SECTORS => 5;
+use constant DEBUG => 1;
+
+# sub dprint
+# {
+#     if (DEBUG) {
+# 	print($_);
+#     }
+# }
+
+($ifilen, $ofilen) = @ARGV;
+
+if ((!defined($ifilen)) || ($ifilen eq "-")) {	# 
+    print(STDERR "Using stdin\n");
+    $IFILE = STDIN;
+} else {
+    open($IFILE, '<', $ifilen) or die "open:$!";
+    print(STDERR "Using $ifilen\n");
+}
+
+binmode($ifile);
+
+if (!defined($ofilen)) {
+    $OFILE = STDOUT;
+} else {
+    open($OFILE, '>', $ofilen) or die "open:$!";
+    print(STDERR "Using $ofilen\n");
+}
+
+binmode($OFILE);
+
+# $pk0 = pack('L', 0);
+$n_long = (SECTOR_SIZE/LONG_SIZE);
+$n_lba = (SECTOR_SIZE/LBA_SIZE);
+
+$len=0;
+while ( read($IFILE, $ch, 1) ) {
+    print($OFILE $ch);
+    $len++;
+}
+$tail = (SECTOR_SIZE - ($len % SECTOR_SIZE)) % SECTOR_SIZE;
+$ch = pack("C", 0);
+print("Len: $len\ttail: $tail\n");
+for ($i=0; $i<$tail; $i++) {
+    print($OFILE $ch);
+}
+
+$st = ($len + $tail) / SECTOR_SIZE;
+
+for ($i=$st; $i<(NUM_SECTORS); $i++) {
+    @ia = ();
+    for ($j=0; $j< $n_lba; $j++) {
+	push(@ia, $i, 0);
+    }
+    @ipk = pack("L[$n_long]", @ia);
+	# There is a 64-bit INT conversion but it normally isn't usable
+	# on a 32-bit platform
+    print($OFILE @ipk);	# Gently simulate a 64-bit LBA
+}
+
+if (defined($ifilen) && (!($ifilen eq "-"))) {
+    close($IFILE);
+}
+
+if (defined($ofilen)) {
+    close($OFILE);
+}
+
+exit 0;