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package ElymasSys;
use strict;
use warnings;
use Elymas;
use ElymasAsm;
use POSIX;
my $rwmask = &POSIX::O_RDONLY | &POSIX::O_WRONLY | &POSIX::O_RDWR;
our $sys = {
'file' => [sub {
my ($data, $scope) = @_;
my $file = createFile(-1, &POSIX::O_RDONLY);
push @$data, [enstruct($file)];
}, ['func', 'sys .file'], 'active'],
'in' => [enstruct(createFile(0, &POSIX::O_RDONLY)), 'passive'],
'out' => [enstruct(createFile(1, &POSIX::O_WRONLY)), 'passive'],
'err' => [enstruct(createFile(2, &POSIX::O_WRONLY)), 'passive'],
'argv' => [[map { [$_, 'string'] } @ARGV[1 .. $#ARGV]], ['array', 'sys .argv', ['range', 0, $#ARGV - 1], ['string']], 'passive'],
'asm' => [enstruct($ElymasAsm::asm), 'passive'],
};
sub createFile {
my ($fd, $flags) = @_;
my $scope;
$scope = \{
' fd' => [$fd, 'int', 'passive'],
' flags' => [$flags, 'int', 'passive'],
' mode' => [0777, 'int', 'passive'],
'readonly' => [sub {
$$scope->{' flags'}->[0] = ($$scope->{' flags'}->[0] & ~($rwmask)) | &POSIX::O_RDONLY;
}, ['func', 'sys .file .readonly'], 'active'],
'writeonly' => [sub {
$$scope->{' flags'}->[0] = ($$scope->{' flags'}->[0] & ~($rwmask)) | &POSIX::O_WRONLY;
}, ['func', 'sys .file .readonly'], 'active'],
'readwrite' => [sub {
$$scope->{' flags'}->[0] = ($$scope->{' flags'}->[0] & ~($rwmask)) | &POSIX::O_RDWR;
}, ['func', 'sys .file .readonly'], 'active'],
'open' => [sub {
my ($data) = @_;
die "file already open" unless $$scope->{' fd'}->[0] == -1;
my $path = popString($data);
my $fd = POSIX::open($path, $$scope->{' flags'}->[0], $$scope->{' mode'}->[0]);
die "cannot open $path: $!" unless defined $fd;
$$scope->{' fd'}->[0] = $fd;
}, ['func', 'sys .file .open'], 'active'],
'close' => [sub {
die "file not open" if $$scope->{' fd'}->[0] == -1;
my $ret = POSIX::close($$scope->{' fd'}->[0]);
die "close failed: $!" unless defined $ret;
$$scope->{' fd'}->[0] = -1;
}, ['func', 'sys .file .close'], 'active'],
'read' => [sub {
my ($data) = @_;
die "file not open" if $$scope->{' fd'}->[0] == -1;
my $count = popInt($data);
my $buf;
my $ret = POSIX::read($$scope->{' fd'}->[0], $buf, $count);
die "read failed: $!" unless defined $ret;
$buf = [map { [ord, 'int'] } split //, $buf];
push @$data, [$buf, ['array', '[]', [['range', 0, $#{$buf}]], ['int']]];
}, ['func', 'sys .file .read'], 'active'],
'readall' => [sub {
my ($data) = @_;
die "file not open" if $$scope->{' fd'}->[0] == -1;
my $count = popInt($data);
my $buf = [];
while($count) {
my $readbuf;
my $ret = POSIX::read($$scope->{' fd'}->[0], $readbuf, $count);
die "read failed: $!" unless defined $ret;
$buf = [@$buf, map { [ord, 'int'] } split //, $readbuf];
$count -= $ret;
}
push @$data, [$buf, ['array', '[]', [['range', 0, $#{$buf}]], ['int']]];
}, ['func', 'sys .file .read'], 'active'],
'readstr' => [sub {
# FIXME: give the file an encoding and respect it here, buffering half-characters if needed
my ($data) = @_;
die "file not open" if $$scope->{' fd'}->[0] == -1;
my $count = popInt($data);
my $buf;
my $ret = POSIX::read($$scope->{' fd'}->[0], $buf, $count);
die "read failed: $!" unless defined $ret;
push @$data, [$buf, 'string'];
}, ['func', 'sys .file .writestr'], 'active'],
'write' => [sub {
my ($data) = @_;
die "file not open" if $$scope->{' fd'}->[0] == -1;
my $buf = popArray($data);
$buf = join '', map { chr($_->[0]) } @$buf;
my $ret = POSIX::write($$scope->{' fd'}->[0], $buf, length $buf);
die "write failed: $!" unless defined $ret;
push @$data, [$ret, 'int'];
}, ['func', 'sys .file .write'], 'active'],
'writeall' => [sub {
my ($data) = @_;
die "file not open" if $$scope->{' fd'}->[0] == -1;
my $buf = popArray($data);
$buf = join '', map { chr($_->[0]) } @$buf;
while($buf) {
my $ret = POSIX::write($$scope->{' fd'}->[0], $buf, length $buf);
die "write failed: $!" unless defined $ret;
$buf = substr($buf, $ret);
}
}, ['func', 'sys .file .writeall'], 'active'],
'writestr' => [sub {
# FIXME: give the file an encoding and respect it here
my ($data) = @_;
die "file not open" if $$scope->{' fd'}->[0] == -1;
my $buf = popString($data);
while($buf) {
my $ret = POSIX::write($$scope->{' fd'}->[0], $buf, length $buf);
die "write failed: $!" unless defined $ret;
$buf = substr($buf, $ret);
}
}, ['func', 'sys .file .writestr'], 'active'],
};
return $$scope;
}
# sub installIntConstant {
# my ($name) = @_;
#
# my $elymasName = $name;
# $elymasName =~ s/_//g;
#
# $linux->{$elymasName} = [${$POSIX::{$name}}, 'int', 'passive'];
# }
1;
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