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 $tryout = "try.i"; | |
d1f3479f | 10 | |
8553b68c | 11 | getopts('fF:ekvI:X', \my %opt) or pod2usage(); |
a93e78e3 | 12 | |
d5f33267 | 13 | my($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 | ||
8553b68c NC |
57 | my %done_header; |
58 | ||
59 | sub do_header { | |
60 | my $header = shift; | |
61 | return if $done_header{$header}++; | |
62 | print $out qq{#include "$header"\n}; | |
63 | } | |
64 | ||
65 | print $out <<'EOF' if $opt{X}; | |
66 | /* Need to do this like this, as cflags.sh sets it for us come what may. */ | |
67 | #undef PERL_CORE | |
68 | ||
4784c5e8 NC |
69 | EOF |
70 | ||
8553b68c NC |
71 | do_header('EXTERN.h'); |
72 | do_header('perl.h'); | |
73 | do_header($header); | |
74 | do_header('XSUB.h') if $opt{X}; | |
4784c5e8 NC |
75 | |
76 | print $out <<"EOF"; | |
be4f373d | 77 | #line 4 "$sentinel" |
d1f3479f NC |
78 | $macro$args |
79 | EOF | |
80 | ||
81 | close $out or die "Can't close $trysource: $!"; | |
82 | ||
a93e78e3 | 83 | print "doing: make $tryout\n" if $opt{v}; |
d1f3479f NC |
84 | system "make $tryout" and die; |
85 | ||
a93e78e3 | 86 | # if user wants 'indent' formatting .. |
27c6397c NC |
87 | my $out_fh; |
88 | ||
89 | if ($opt{f} || $opt{F}) { | |
90 | # a: indent is a well behaved filter when given 0 arguments, reading from | |
91 | # stdin and writing to stdout | |
92 | # b: all our braces should be balanced, indented back to column 0, in the | |
93 | # headers, hence everything before our #line directive can be ignored | |
94 | # | |
95 | # We can take advantage of this to reduce the work to indent. | |
96 | ||
97 | my $indent_command = $opt{f} ? 'indent' : $opt{F}; | |
98 | ||
99 | if (defined $opt{I}) { | |
100 | $indent_command .= " $opt{I}"; | |
101 | } | |
102 | open $out_fh, '|-', $indent_command or die $?; | |
103 | } else { | |
104 | $out_fh = \*STDOUT; | |
105 | } | |
a93e78e3 | 106 | |
d1f3479f NC |
107 | open my $fh, '<', $tryout or die "Can't open $tryout: $!"; |
108 | ||
109 | while (<$fh>) { | |
27c6397c | 110 | print $out_fh $_ if /$sentinel/o .. 1; |
d1f3479f NC |
111 | } |
112 | ||
a93e78e3 JC |
113 | unless ($opt{k}) { |
114 | foreach($trysource, $tryout) { | |
115 | die "Can't unlink $_" unless unlink $_; | |
116 | } | |
d1f3479f | 117 | } |
d5f33267 MHM |
118 | |
119 | __END__ | |
120 | ||
121 | =head1 NAME | |
122 | ||
123 | expand-macro.pl - expand C macros using the C preprocessor | |
124 | ||
125 | =head1 SYNOPSIS | |
126 | ||
127 | expand-macro.pl [options] [ < macro-name | macro-expression | - > [headers] ] | |
128 | ||
129 | options: | |
130 | -f use 'indent' to format output | |
131 | -F <tool> use <tool> to format output (instead of -f) | |
132 | -e erase try.[ic] instead of failing when they're present (errdetect) | |
133 | -k keep them after generating (for handy inspection) | |
134 | -v verbose | |
135 | -I <indent-opts> passed into indent | |
8553b68c | 136 | -X include "XSUB.h" (and undefine PERL_CORE) |
d5f33267 MHM |
137 | |
138 | =cut |