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1 | #!perl -w |
2 | use strict; |
3 | |
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4 | use Getopt::Std; |
5 | |
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6 | use vars qw($trysource $tryout $sentinel); |
7 | $trysource = "try.c"; |
8 | $tryout = "try.i"; |
9 | |
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10 | getopts('fF:ekvI:', \my %opt) or usage(); |
11 | |
12 | sub usage { |
13 | die<<EO_HELP; |
14 | @_; |
15 | usage: $0 [options] <macro-name> [headers] |
16 | options: |
17 | -f use 'indent' to format output |
18 | -F <tool> use <tool> to format output (instead of -f) |
19 | -e erase try.[ic] instead of failing when theyre present (errdetect) |
20 | -k keep them after generating (for handy inspection) |
21 | -v verbose |
22 | -I <indent-opts> passed into indent |
23 | EO_HELP |
24 | } |
25 | |
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26 | my $macro = shift; |
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27 | usage "missing <macro-name>" unless defined $macro; |
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28 | |
29 | $sentinel = "$macro expands to"; |
30 | |
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31 | usage "-f and -F <tool> are exclusive\n" if $opt{f} and $opt{F}; |
32 | |
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33 | foreach($trysource, $tryout) { |
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34 | unlink $_ if $opt{e}; |
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35 | die "You already have a $_" if -e $_; |
36 | } |
37 | |
38 | if (!@ARGV) { |
39 | open my $fh, '<', 'MANIFEST' or die "Can't open MANIFEST: $!"; |
40 | while (<$fh>) { |
41 | push @ARGV, $1 if m!^([^/]+\.h)\t!; |
42 | } |
43 | } |
44 | |
45 | my $args = ''; |
46 | |
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47 | my $header; |
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48 | while (<>) { |
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49 | next unless /^#\s*define\s+$macro\b/; |
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50 | my ($def_args) = /^#\s*define\s+$macro\(([^)]*)\)/; |
51 | if (defined $def_args) { |
52 | my @args = split ',', $def_args; |
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53 | print "# macro: $macro args: @args in $_\n" if $opt{v}; |
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54 | my $argname = "A0"; |
55 | $args = '(' . join (', ', map {$argname++} 1..@args) . ')'; |
56 | } |
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57 | $header = $ARGV; |
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58 | last; |
59 | } |
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60 | die "$macro not found\n" unless defined $header; |
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61 | |
62 | open my $out, '>', $trysource or die "Can't open $trysource: $!"; |
63 | |
64 | print $out <<"EOF"; |
65 | #include "EXTERN.h" |
66 | #include "perl.h" |
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67 | #include "$header" |
68 | #line 4 "$sentinel" |
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69 | $macro$args |
70 | EOF |
71 | |
72 | close $out or die "Can't close $trysource: $!"; |
73 | |
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74 | print "doing: make $tryout\n" if $opt{v}; |
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75 | system "make $tryout" and die; |
76 | |
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77 | # if user wants 'indent' formatting .. |
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78 | my $out_fh; |
79 | |
80 | if ($opt{f} || $opt{F}) { |
81 | # a: indent is a well behaved filter when given 0 arguments, reading from |
82 | # stdin and writing to stdout |
83 | # b: all our braces should be balanced, indented back to column 0, in the |
84 | # headers, hence everything before our #line directive can be ignored |
85 | # |
86 | # We can take advantage of this to reduce the work to indent. |
87 | |
88 | my $indent_command = $opt{f} ? 'indent' : $opt{F}; |
89 | |
90 | if (defined $opt{I}) { |
91 | $indent_command .= " $opt{I}"; |
92 | } |
93 | open $out_fh, '|-', $indent_command or die $?; |
94 | } else { |
95 | $out_fh = \*STDOUT; |
96 | } |
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97 | |
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98 | open my $fh, '<', $tryout or die "Can't open $tryout: $!"; |
99 | |
100 | while (<$fh>) { |
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101 | print $out_fh $_ if /$sentinel/o .. 1; |
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102 | } |
103 | |
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104 | unless ($opt{k}) { |
105 | foreach($trysource, $tryout) { |
106 | die "Can't unlink $_" unless unlink $_; |
107 | } |
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108 | } |