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454 lines
11 KiB
454 lines
11 KiB
#---------------------------------------------------------------------
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package GetParams;
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#
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# (c) 2000 Microsoft Corporation. All rights reserved.
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#
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# Version: 1.00 (01-14-2000) : Basic function implement
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# 1.01 (01-17-2000) : Use -tag to define the function
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# 1.02 (02-01-2000) : Fix $self problem => Complete Object Oriented
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# 1.03 (05-02-2000) : Provide -? and -x:xxx parameters & fix path value problem
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# 1.04 (05-04-2000) : Provide getparams, getparamsEnv function & remove $class
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#---------------------------------------------------------------------
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$VERSION = '1.04';
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require 5.003;
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use Getopt::Std;
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use strict;
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no strict 'vars';
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no strict 'subs';
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require Exporter;
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@ISA = qw(Exporter);
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sub new {
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my ($class)=shift;
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my $self = {@_};
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$class = ref($class) || $class;
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# The keys of 'self' are
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#
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# -n <necessary format> : see Usage
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# -o <option format> : see Usage
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# -p <variable list> : see Usage
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# -h <hash name> : see Usage
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# -VariableSet <varfun> : Variable Setting Function, call varfun($name, $value)
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# -Process <profun> : argument process function, call profun(@argumentlist)
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# -Error <errfun> : error function, call errfun("error message")
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$self->{-Process}=sub {process($self,@_)} if (!defined $self->{-Process});
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$self->{-Error}=sub {Error($self, @_)} if (!defined $self->{-Error});
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@EXPORT = qw();
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return bless ($self, $class);
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}
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sub process {
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my $self=shift;
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# Step 0. Backup the @ARGV, because getopts only works for @ARGV
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my (@BAK_ARGV) = @ARGV;
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# variable defined
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#
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# $splitnum is a locator, locate to the last element of syntax parameter,
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# $splitnum + 1 will be the command line arguments
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#
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# $swlist := $necessary$optional
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#
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# @namelist is stored the variable name using in cmd script
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my ($splitnum, @ARGV_tmp, $swlist, @namelist, @namelist_tmp)=(-1);
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# Step 0.5. filter -? => set $HELP to 1 and translate -x:xxx => -x xxx, \x, .x or /x => -x
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for (@_) {
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if (/^[\/\\\.]([\w|\?])(:.+)?$/) {
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$_ = "-$1$2";
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}
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if (/-\?/) {
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if (defined $self->{-VariableSet}) {
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&{$self->{-VariableSet}}("HELP", 1);
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} else {
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PerlVarSet($self, "HELP", 1);
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local $Exporter::ExportLevel = 2; #Export the value to its parent-parent (because its parent is sub {&Process($self,@_)}
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import GetParams;
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}
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return;
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} elsif (/^(-.):(.+)?/) {
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push @ARGV_tmp, $1;
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push @ARGV_tmp, $2;
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} else {
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push @ARGV_tmp, $_;
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}
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}
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@_ = @ARGV_tmp;
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# Step 1. Get switch format for (n)ecessary, (o)ptional, (h)ash and (p)arameter
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while (1) {
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my $opt = shift;
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my $value = shift;
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if (($opt =~ /([nohp])/m) && (!defined $self->{"-$1"}) && (!defined $self->{"-p"})) {
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my $optchar=$1;
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$self->{"-$optchar"} = $value;
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$splitnum += 2;
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} else {
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last;
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}
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}
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@ARGV = @ARGV_tmp[$splitnum+1..$#ARGV_tmp];
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&Usage if (!defined($self->{-n}) and !defined($self->{-o}));
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$self->{-VariableSet} = sub {PerlHashSet($self, @_)} if ((defined $self->{-h}) && (!defined $self->{-VariableSet}));
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$self->{-VariableSet} = sub {PerlVarSet($self, @_)} if (!defined $self->{-VariableSet});
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$swlist = "$self->{-n}$self->{-o}";
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@namelist_tmp = split(/ /, $self->{-p});
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# push user-defined variable name to namelist
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while ($swlist =~ /([^:])/g) {
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my $optchar = $1;
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if ($#namelist_tmp != -1) {
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push @namelist, (shift @namelist_tmp);
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} else {
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&{$self->{-Error}}("Variable not defined for '\$opt_$optchar'");
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}
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}
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# Step 2. According option defined, call getopts to evaluate the use @ARGV
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if ($ARGV[0] =~ /^-/) {
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getopts($swlist);
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} elsif ("$self->{-n}" ne "" or $#ARGV != -1) {
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if ($#ARGV == -1) {
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&{$self->{-Error}}("Please define parameters");
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}
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else {
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&{$self->{-Error}}("Incorrect switch format");
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}
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}
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# Step 3. Look for the value and set the value via $self->{-VariableSet}
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while($swlist =~ /([^:])/g) {
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my ($name, $value, $optchar)=(shift @namelist, eval("\$opt_$1"), $1);
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if ($value ne "") {
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&{$self->{-VariableSet}}($name, $value);
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} elsif ($self->{-n} =~ /$optchar/) {
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&{$self->{-Error}}("Necessary option '-$optchar' for variable '$name' undefined!!");
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}
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}
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# Step 4. Recover the @ARGV;
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@ARGV = @BAK_ARGV;
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if(@EXPORT) {
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local $Exporter::ExportLevel = 2; #Export the value to its parent-parent (because its parent is sub {&Process($self,@_)}
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import GetParams;
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}
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}
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sub getparams {
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process(new, @_);
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}
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sub getparamsENV {
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process(new, '-h' => \%ENV, @_);
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}
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sub Error {
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my $self=shift;
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printf("echo %s\nseterror.exe 1\n", shift);
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exit(1);
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}
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sub PerlVarSet {
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my ($self, $name, $value)=@_;
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no strict 'refs';
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${$name} = $value;
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push( @EXPORT, "\$$name" );
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}
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sub CmdVarSet {
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my($self, $name, $value)=@_;
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print "set $name=$value\n";
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}
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sub PerlHashSet {
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my($self, $name, $value)=@_;
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no strict 'refs';
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${$self->{-h}}{$name}="$value";
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}
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sub Usage {
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print <<USAGE;
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$0 - Get Option from command line
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============================================================================
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Syntax: $0 <syntax> <cmdline> [-?]
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where syntax format is [[-n <fmt>|-o <fmt>] [-h hashadrs] [-p varlist]
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cmdline format is [arg [arg [...]]
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-p must be the last parameter of the syntax
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============================================================================
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Parameters:
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fmt : <alphabet>[:],
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with colon for argument option, such as f: for -f myfile
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no colon for switch, such as Y for -Y
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hashadrs : store the value with varlist as keys into a hash address;
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only for Perl program
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varlist : variable list, such as myfile
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arg : real arugment, such as abc.txt
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============================================================================
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Example:
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1. parse a '-s <server> -p <project> [-r] [-c comment]' parameter
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to srv, proj, opt_r, comment
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=> $0 -n s:p: -o rc: -p "srv proj opt_r comment" -s myserver -p myproj -c mycomment
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2. echo "set HELP = 1"
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=> $0 -n s:p: -o rc: -p "srv proj opt_r comment" -s myserver -?
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3. compatible use:
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=> $0 /n s:p: /o:rc: -p "srv proj opt_r comment" -s: myserver /p myproj \c mycomment
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USAGE
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exit(1);
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}
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# Command line process
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if (eval("\$0=~/" . __PACKAGE__ . "\\.pm\$/i")) {
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my $getopt=GetParams->new(-VariableSet => sub {&CmdVarSet($self,@_)});
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&{$getopt->{-Process}}(@ARGV);
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}
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=head1 NAME
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B<GetParams> - Process single-character switches with switch clustering
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=head1 SYNOPSIS
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# for cmd script, below print 'set opt_s=mysrv' and 'set opt_p=myproj'
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perl GetParams.pm -n s:p: -o r -p "opt_s opt_p sw_r" -s mysrv -p myproj
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# for perl module, below set $opt_s=mysrv and $opt_p=myproj
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my $getopt1=GetParams->new;
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@syntax = (
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-n => 's:p:',
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-o => 'rc:',
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-p => 'opt_s opt_p opt_r opt_c',
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);
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# Set variable's value by @ARGV
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&{$getopt1->{-Process}}(
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@syntax,
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@ARGV
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);
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# Set value to Hash, like $myhash{opt_s}
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&{$getopt1->{-Process}}(
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'-h' => \%myhash,
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@syntax,
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@ARGV
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);
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# or Directly call
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GetParams::getparams(
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@syntax,
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@ARGV
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);
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GetParams::getparams(
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'-h' => \%myhash,
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@syntax,
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@ARGV
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);
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# Set variable directly to %ENV
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GetParams::getparamsENV(
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@syntax,
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@ARGV
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);
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# for help
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perl GetParams.pm -?
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=> SET HELP = 1
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&{$getopt1->{-Process}}(
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@syntax,
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'-?'
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);
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print $HELP; # print 1
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=head1 DESCRIPTION
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This module process the signal character switch to variable(s). The format
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in C<-n> C<-o> are the same definition of the arguement as L<"Getopt::Std">
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module. The real value will be evaluate and assign to the variable defined
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in C<-p>. From Perl program, you can also assign the argument into a hash.
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Just assign hash address (\%myhash) to C<-h>.
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=head1 INSTANCES
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=head2 Syntax Parameters
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=head3 $GetParams->{-n}=<fmt>
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Stored necessary option (<alphabet>:) / switch (<alphabet>), such as
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'a:bc:' for -a <value> -b -c <value>.
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=head3 $GetParams->{-o}=<fmt>
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Stored optional option (<alphabet>:) / switch (<alphabet>), such as
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'de:' for -d -e <value>.
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=head3 $GetParams->{-h}=<hash address>
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Only for Perl program, stored to I<hash address> when you want to store
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the value to a hash.
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=head3 $GetParams->{-p}=<variable list>
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A list stored variables name or hash keys, such as 'opt_p opt_x opt_t'.
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The switch value will be set to 1 if assigned in the command line arguments.
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The order in the I<variable list> should always follow by -n I<fmt> -o I<fmt>
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option with space to separate.
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=head2 Command Line Parameters
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The real argument you want to process, such as @ARGV or %* (for cmd script).
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=head1 METHODS
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=head3 GetParams->new([syntax format][function assignment])
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create an object for process the argument.
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# Example for how to use this method
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my $getopt1=GetParams->new;
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# Example for assign syntax format
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my $getopt2=GetParams->new(
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-n => 's:',
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-p => var_s,
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);
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# Example for assign function
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sub dbgVarSet {
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my($name, $value);
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print "Assign $value to $name
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}
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my $getopt3=GetParams->new(-VariableSet = \&dbgVarSet);
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=head3 &{$GetParams->{-Process}}([syntax format] <command line arguments>)
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stored the procedure for process argument, by default is GetParams::process.
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# Example for how to execute this function
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my $getopt4=GetParams->new;
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&{$getopt4->{-Process}}(
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-o => 'rc:',
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-p => 'opt_r opt_c',
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@ARGV
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);
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# Example for how to define your process
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my $getopt5=GetParams->new(-Process => \&myProcess);
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# Example for how to define your process
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my $getopt6=GetParams->new;
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$getopt6->{-Process}=\&myProcess;
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sub myProcess {
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my @argu=@_;
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my $ptr=0;
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for($ptr=0;$ptr<$#argu;$ptr+=2) {
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print "option:$argu[$ptr]\t\t$argu[$ptr+1]\n";
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}
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}
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=head3 &{$GetParams->{-VariableSet}}($name,$value)
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stored the procedure for Variable Setting, we can call with ($name, $value) for
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setting the $value to $name.
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# Example for how to define your VariableSet function
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my $getopt7=GetParams->new(-VariableSet => \&myVarSet);
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# Example for how to define your VariableSet function
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my $getopt8=GetParams->new;
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$getopt8->{-VariableSet}=\&myVarSet;
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# Example for how to define your VariableSet function
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my $getopt9=GetParams->new;
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&{$getopt9->{-Process}}(
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'-o' => 'r',
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'-VariableSet' => \&myVarSet, # set in the last minute
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'-p' => 'sw_r',
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@ARGV
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);
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sub myVarSet {
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my ($name, $value)=@_;
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print "Set Value ($value) to Variable ($name)\n";
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}
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=head3 &{$GetParams->{-Error}}($msg)
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stored the procedure for Error handling, we can call with ($errmsg) for the error.
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# Example for how to define your Error function for GetParams
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my $getopt10=GetParams->new(-Error => \&myError);
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# Example for how to define your VariableSet function
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my $getopt11=GetParams->new;
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$getopt11->{-Error}=\&myError;
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# Example for how to define your VariableSet function
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my $getopt11=GetParams->new;
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&{$getopt9->{-Process}}(
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'-o' => 'r',
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'-Error' => \&myError, # set in the last minute
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'-p' => 'sw_r',
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@ARGV
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);
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sub myError {
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my ($msg)=@_;
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print "GetParams fail ($msg)\n";
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}
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=head1 SEE ALSO
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L<"Getopt::Std">
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=head1 AUTHOR
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Benson Tan <[email protected]>
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=cut
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1;
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