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86530b38 AT |
1 | # -*- perl -*- |
2 | ||
3 | package Midas::Command; | |
4 | use strict; | |
5 | ||
6 | use Getopt::Long; | |
7 | use File::Spec; | |
8 | use File::Basename; | |
9 | use File::Spec; | |
10 | use Cwd; | |
11 | ||
12 | use Midas::Error; | |
13 | use Midas::Globals; | |
14 | ||
15 | use TRELoad 'BitFieldTie'; | |
16 | ||
17 | require Exporter; | |
18 | ||
19 | our @ISA = qw(Exporter); | |
20 | our @EXPORT = qw(run_command chat fatal banner string2bf hexstring2bf | |
21 | verbose opt_n | |
22 | ); | |
23 | ||
24 | our $Prg = basename $0; | |
25 | #our %opt = ( verbose => 1 ); | |
26 | our $Verbose = 1; | |
27 | our $N = 0; | |
28 | ||
29 | ############################################################################## | |
30 | ||
31 | sub verbose { | |
32 | return $$Verbose if ref $Verbose; | |
33 | return $Verbose; | |
34 | } | |
35 | ||
36 | ############################################################################## | |
37 | ||
38 | sub opt_n { | |
39 | return $$N if ref $N; | |
40 | return $N; | |
41 | } | |
42 | ||
43 | ############################################################################## | |
44 | ||
45 | sub fatal { | |
46 | my $msg = shift; | |
47 | my $code = shift; | |
48 | ||
49 | my $obj = Midas::Error->throw($msg, $code); | |
50 | ||
51 | die $obj; | |
52 | } | |
53 | ||
54 | ############################################################################## | |
55 | ||
56 | sub chat { | |
57 | my $msgs = shift; | |
58 | my $level = shift; | |
59 | ||
60 | $level = 1 unless defined $level; | |
61 | return unless verbose >= $level; | |
62 | ||
63 | local($_); | |
64 | my @lines = split /\n/, "$msgs"; | |
65 | my $string = "$Prg: " . (join "\n$Prg: $_", @lines); | |
66 | ||
67 | print "$string\n"; | |
68 | } | |
69 | ||
70 | ############################################################################## | |
71 | ||
72 | sub banner { | |
73 | my @lines = @_; | |
74 | ||
75 | chat "###########################################################\n", 2; | |
76 | ||
77 | foreach my $line (@lines) { | |
78 | print "$Prg: ## $line\n" if verbose > 0; | |
79 | } | |
80 | ||
81 | chat "###########################################################\n", 2; | |
82 | } | |
83 | ||
84 | ############################################################################## | |
85 | ||
86 | sub configure { | |
87 | my %args = @_; | |
88 | ||
89 | foreach my $key (keys %args) { | |
90 | if($key eq 'verbose') { | |
91 | $Verbose = $args{$key}; | |
92 | } elsif($key eq 'n') { | |
93 | $N = $args{$key}; | |
94 | } else { | |
95 | fatal "Midas::Command does not recongnize configuration option ". | |
96 | "$key.\n"; | |
97 | } | |
98 | } | |
99 | ||
100 | return ( verbose => $Verbose, | |
101 | n => $N, | |
102 | ); | |
103 | ||
104 | } | |
105 | ||
106 | ############################################################################## | |
107 | ||
108 | sub run_command { | |
109 | my $command = shift; | |
110 | my @flags = @_; | |
111 | ||
112 | my %cmd_opt = ( | |
113 | verbose => 1, | |
114 | fatal => 1, | |
115 | errcode => M_CMDFAIL, | |
116 | pass_errcode => 0, | |
117 | ); | |
118 | my @options = qw( verbose=i fatal! errcode=i pass_errcode! ); | |
119 | local (@ARGV) = @flags; | |
120 | Getopt::Long::Configure('no_pass_through'); | |
121 | GetOptions(\%cmd_opt, @options) or | |
122 | fatal "Cannot parse flags to run_command: @flags\n"; | |
123 | ||
124 | if(verbose >= $cmd_opt{verbose}) { | |
125 | print "$Prg: $command\n"; | |
126 | } | |
127 | my $status = 0; | |
128 | $status = system($command) unless opt_n; | |
129 | if($cmd_opt{fatal} and $status) { | |
130 | my $exit = $status >> 8; | |
131 | my $sig = $status & 127; | |
132 | my $core = $status & 128; | |
133 | my $core_msg = $core ? "Dumped core." : ""; | |
134 | ||
135 | if($sig) { | |
136 | fatal "Command \"$command\" died via signal $sig. $core_msg\n", | |
137 | $cmd_opt{errcode}; | |
138 | } | |
139 | ||
140 | if($cmd_opt{pass_errcode} and exists $ERRCODES{$exit}) { | |
141 | fatal "Command \"$command\" failed. $core_msg\n", $exit; | |
142 | } else { | |
143 | fatal "Command \"$command\" failed with status $exit. $core_msg\n", | |
144 | $cmd_opt{errcode}; | |
145 | } | |
146 | } | |
147 | } | |
148 | ||
149 | ############################################################################## | |
150 | ||
151 | sub string2bf { | |
152 | my $string = shift; | |
153 | my $width = shift; | |
154 | ||
155 | fatal "Cannot run string2bf without a width argument!\n", M_CODE | |
156 | unless defined $width; | |
157 | ||
158 | my $ishex = 0; | |
159 | if($string =~ /^\s*0[xX]/ or ref($string) or $CONFIG{default_radix} eq 'hex') | |
160 | { | |
161 | $ishex = 1; | |
162 | # Test for overflow | |
163 | (my $mystring = $string) =~ s/^\s*0[xX]//; | |
164 | $mystring =~ s/\s*$//; | |
165 | my $max_digits = int($width / 4); | |
166 | $max_digits++ if (($max_digits) * 4 != $width); | |
167 | ||
168 | if(length $mystring > $max_digits) { | |
169 | my $difference = (length $mystring) - $max_digits; | |
170 | my $leader = substr($mystring, 0, $difference); | |
171 | return "Hex overflow: \"$string\" won't fit in $width bits!\n" | |
172 | unless $leader eq ('0' x $difference); | |
173 | } | |
174 | } else { | |
175 | ||
176 | my $max_bf = BitFieldTie->new(65, "1"); | |
177 | $max_bf->left_shift($width); | |
178 | ||
179 | my $test_bf; | |
180 | eval { | |
181 | $test_bf = BitFieldTie->new_dec(65, $string); | |
182 | }; | |
183 | if(not $@) { | |
184 | if($test_bf->ucompare($max_bf) >= 0) { | |
185 | return "Dec Overflow: \"$string\" won't fit in $width bits!\n"; | |
186 | } | |
187 | } | |
188 | ||
189 | } | |
190 | ||
191 | ||
192 | my $bf; | |
193 | eval { | |
194 | if($ishex) { | |
195 | $bf = BitFieldTie->new($width, $string); | |
196 | } else { | |
197 | $bf = BitFieldTie->new_dec($width, $string); | |
198 | } | |
199 | }; | |
200 | if($@) { | |
201 | return $@; | |
202 | } else { | |
203 | return $bf; | |
204 | } | |
205 | } | |
206 | ||
207 | ############################################################################## | |
208 | ||
209 | sub hexstring2bf { | |
210 | my $string = shift; | |
211 | my $width = shift; | |
212 | ||
213 | $string = "0x$string" unless $string =~ /^\s*0[xX]/; | |
214 | return string2bf($string, $width); | |
215 | } | |
216 | ||
217 | ############################################################################## | |
218 | 1; |