Commit | Line | Data |
---|---|---|
d1f3479f NC |
1 | #!perl -w |
2 | use strict; | |
3 | ||
d5f33267 | 4 | use Pod::Usage; |
a93e78e3 | 5 | use Getopt::Std; |
d5f33267 | 6 | $Getopt::Std::STANDARD_HELP_VERSION = 1; |
a93e78e3 | 7 | |
d5f33267 MHM |
8 | my $trysource = "try.c"; |
9 | my $tryout = "try.i"; | |
d1f3479f | 10 | |
d5f33267 | 11 | getopts('fF:ekvI:', \my %opt) or pod2usage(); |
a93e78e3 | 12 | |
d5f33267 | 13 | my($expr, @headers) = @ARGV ? splice @ARGV : "-"; |
d1f3479f | 14 | |
d5f33267 | 15 | pod2usage "-f and -F <tool> are exclusive\n" if $opt{f} and $opt{F}; |
a93e78e3 | 16 | |
d1f3479f | 17 | foreach($trysource, $tryout) { |
a93e78e3 | 18 | unlink $_ if $opt{e}; |
d1f3479f NC |
19 | die "You already have a $_" if -e $_; |
20 | } | |
21 | ||
d5f33267 MHM |
22 | if ($expr eq '-') { |
23 | warn "reading from stdin...\n"; | |
24 | $expr = do { local $/; <> }; | |
25 | } | |
26 | ||
27 | my($macro, $args) = $expr =~ /^\s*(\w+)((?:\s*\(.*\))?)\s*;?\s*$/s | |
28 | or pod2usage "$expr doesn't look like a macro-name or macro-expression to me"; | |
29 | ||
30 | if (!(@ARGV = @headers)) { | |
d1f3479f NC |
31 | open my $fh, '<', 'MANIFEST' or die "Can't open MANIFEST: $!"; |
32 | while (<$fh>) { | |
33 | push @ARGV, $1 if m!^([^/]+\.h)\t!; | |
34 | } | |
ed690650 | 35 | push @ARGV, 'config.h' if -f 'config.h'; |
d1f3479f NC |
36 | } |
37 | ||
be4f373d | 38 | my $header; |
d1f3479f | 39 | while (<>) { |
e25a7dc2 | 40 | next unless /^#\s*define\s+$macro\b/; |
d1f3479f | 41 | my ($def_args) = /^#\s*define\s+$macro\(([^)]*)\)/; |
d5f33267 | 42 | if (defined $def_args && !$args) { |
d1f3479f | 43 | my @args = split ',', $def_args; |
a93e78e3 | 44 | print "# macro: $macro args: @args in $_\n" if $opt{v}; |
d1f3479f NC |
45 | my $argname = "A0"; |
46 | $args = '(' . join (', ', map {$argname++} 1..@args) . ')'; | |
47 | } | |
be4f373d | 48 | $header = $ARGV; |
d1f3479f NC |
49 | last; |
50 | } | |
be4f373d | 51 | die "$macro not found\n" unless defined $header; |
d1f3479f NC |
52 | |
53 | open my $out, '>', $trysource or die "Can't open $trysource: $!"; | |
54 | ||
d5f33267 MHM |
55 | my $sentinel = "$macro expands to"; |
56 | ||
d1f3479f NC |
57 | print $out <<"EOF"; |
58 | #include "EXTERN.h" | |
59 | #include "perl.h" | |
4784c5e8 NC |
60 | EOF |
61 | ||
c3c0aa28 | 62 | print $out qq{#include "$header"\n} |
4784c5e8 NC |
63 | unless $header eq 'perl.h' or $header eq 'EXTERN.h'; |
64 | ||
65 | print $out <<"EOF"; | |
be4f373d | 66 | #line 4 "$sentinel" |
d1f3479f NC |
67 | $macro$args |
68 | EOF | |
69 | ||
70 | close $out or die "Can't close $trysource: $!"; | |
71 | ||
a93e78e3 | 72 | print "doing: make $tryout\n" if $opt{v}; |
d1f3479f NC |
73 | system "make $tryout" and die; |
74 | ||
a93e78e3 | 75 | # if user wants 'indent' formatting .. |
27c6397c NC |
76 | my $out_fh; |
77 | ||
78 | if ($opt{f} || $opt{F}) { | |
79 | # a: indent is a well behaved filter when given 0 arguments, reading from | |
80 | # stdin and writing to stdout | |
81 | # b: all our braces should be balanced, indented back to column 0, in the | |
82 | # headers, hence everything before our #line directive can be ignored | |
83 | # | |
84 | # We can take advantage of this to reduce the work to indent. | |
85 | ||
86 | my $indent_command = $opt{f} ? 'indent' : $opt{F}; | |
87 | ||
88 | if (defined $opt{I}) { | |
89 | $indent_command .= " $opt{I}"; | |
90 | } | |
91 | open $out_fh, '|-', $indent_command or die $?; | |
92 | } else { | |
93 | $out_fh = \*STDOUT; | |
94 | } | |
a93e78e3 | 95 | |
d1f3479f NC |
96 | open my $fh, '<', $tryout or die "Can't open $tryout: $!"; |
97 | ||
98 | while (<$fh>) { | |
27c6397c | 99 | print $out_fh $_ if /$sentinel/o .. 1; |
d1f3479f NC |
100 | } |
101 | ||
a93e78e3 JC |
102 | unless ($opt{k}) { |
103 | foreach($trysource, $tryout) { | |
104 | die "Can't unlink $_" unless unlink $_; | |
105 | } | |
d1f3479f | 106 | } |
d5f33267 MHM |
107 | |
108 | __END__ | |
109 | ||
110 | =head1 NAME | |
111 | ||
112 | expand-macro.pl - expand C macros using the C preprocessor | |
113 | ||
114 | =head1 SYNOPSIS | |
115 | ||
116 | expand-macro.pl [options] [ < macro-name | macro-expression | - > [headers] ] | |
117 | ||
118 | options: | |
119 | -f use 'indent' to format output | |
120 | -F <tool> use <tool> to format output (instead of -f) | |
121 | -e erase try.[ic] instead of failing when they're present (errdetect) | |
122 | -k keep them after generating (for handy inspection) | |
123 | -v verbose | |
124 | -I <indent-opts> passed into indent | |
125 | ||
126 | =cut |