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mkhelp: simplified the gzip code

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This eliminates the need for an external gzip program, which wasn't
working with Busybox's gzip, anyway. It now compresses using perl's
IO::Compress::Gzip
This commit is contained in:
Dan Fandrich 2017-03-09 22:15:54 +01:00
parent 7d62502d6c
commit 9f3bc40f7f
1 changed files with 16 additions and 43 deletions
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59
src/mkhelp.pl
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@ -102,39 +102,6 @@ while(<READ>) {
}
close(READ);
# if compressed
if($c) {
my @test = `gzip --version 2>&1`;
if($test[0] =~ /gzip/) {
open(GZIP, ">dumpit") ||
die "can't create the dumpit file, try without -c";
binmode GZIP;
for(@out) {
print GZIP $_;
$gzip += length($_);
}
close(GZIP);
system("gzip --best --no-name dumpit");
open(GZIP, "<dumpit.gz") ||
die "can't read the dumpit.gz file, try without -c";
binmode GZIP;
while(<GZIP>) {
push @gzip, $_;
$gzipped += length($_);
}
close(GZIP);
unlink("dumpit.gz");
}
else {
# no gzip, no compression!
undef $c;
print STDERR "MEEEP: Couldn't find gzip, disable compression\n";
}
}
$now = localtime;
print <<HEAD
/*
@ -146,27 +113,33 @@ print <<HEAD
HEAD
;
if($c) {
# if compressed
use IO::Compress::Gzip;
my $content = join("", @out);
my $gzippedContent;
IO::Compress::Gzip::gzip(
\$content, \$gzippedContent, Level => 9, TextFlag => 1) or die "gzip failed:";
$gzip = length($content);
$gzipped = length($gzippedContent);
print <<HEAD
#include <zlib.h>
#include "memdebug.h" /* keep this as LAST include */
static const unsigned char hugehelpgz[] = {
/* This mumbo-jumbo is the huge help text compressed with gzip.
Thanks to this operation, the size of this data shrunk from $gzip
Thanks to this operation, the size of this data shrank from $gzip
to $gzipped bytes. You can disable the use of compressed help
texts by NOT passing -c to the mkhelp.pl tool. */
HEAD
;
my $c=0;
print " ";
for(@gzip) {
my @all=split(//, $_);
for(@all) {
my $num=ord($_);
printf(" 0x%02x,", 0+$num);
if(++$c>11) {
print "\n ";
$c=0;
}
for(split(//, $gzippedContent)) {
my $num=ord($_);
printf(" 0x%02x,", 0+$num);
if(!(++$c % 12)) {
print "\n ";
}
}
print "\n};\n";