Commit | Line | Data |
---|---|---|
d1f3479f NC |
1 | #!perl -w |
2 | use strict; | |
3 | ||
d5f33267 | 4 | use Pod::Usage; |
a93e78e3 | 5 | use Getopt::Std; |
2c949eae | 6 | use Config; |
d5f33267 | 7 | $Getopt::Std::STANDARD_HELP_VERSION = 1; |
a93e78e3 | 8 | |
d5f33267 MHM |
9 | my $trysource = "try.c"; |
10 | my $tryout = "try.i"; | |
d1f3479f | 11 | |
8553b68c | 12 | getopts('fF:ekvI:X', \my %opt) or pod2usage(); |
a93e78e3 | 13 | |
d5f33267 | 14 | my($expr, @headers) = @ARGV ? splice @ARGV : "-"; |
d1f3479f | 15 | |
d5f33267 | 16 | pod2usage "-f and -F <tool> are exclusive\n" if $opt{f} and $opt{F}; |
a93e78e3 | 17 | |
d1f3479f | 18 | foreach($trysource, $tryout) { |
a93e78e3 | 19 | unlink $_ if $opt{e}; |
d1f3479f NC |
20 | die "You already have a $_" if -e $_; |
21 | } | |
22 | ||
d5f33267 MHM |
23 | if ($expr eq '-') { |
24 | warn "reading from stdin...\n"; | |
25 | $expr = do { local $/; <> }; | |
26 | } | |
27 | ||
28 | my($macro, $args) = $expr =~ /^\s*(\w+)((?:\s*\(.*\))?)\s*;?\s*$/s | |
29 | or pod2usage "$expr doesn't look like a macro-name or macro-expression to me"; | |
30 | ||
31 | if (!(@ARGV = @headers)) { | |
d1f3479f NC |
32 | open my $fh, '<', 'MANIFEST' or die "Can't open MANIFEST: $!"; |
33 | while (<$fh>) { | |
34 | push @ARGV, $1 if m!^([^/]+\.h)\t!; | |
35 | } | |
ed690650 | 36 | push @ARGV, 'config.h' if -f 'config.h'; |
d1f3479f NC |
37 | } |
38 | ||
be4f373d | 39 | my $header; |
d1f3479f | 40 | while (<>) { |
e25a7dc2 | 41 | next unless /^#\s*define\s+$macro\b/; |
d1f3479f | 42 | my ($def_args) = /^#\s*define\s+$macro\(([^)]*)\)/; |
d5f33267 | 43 | if (defined $def_args && !$args) { |
d1f3479f | 44 | my @args = split ',', $def_args; |
a93e78e3 | 45 | print "# macro: $macro args: @args in $_\n" if $opt{v}; |
d1f3479f NC |
46 | my $argname = "A0"; |
47 | $args = '(' . join (', ', map {$argname++} 1..@args) . ')'; | |
48 | } | |
be4f373d | 49 | $header = $ARGV; |
d1f3479f NC |
50 | last; |
51 | } | |
be4f373d | 52 | die "$macro not found\n" unless defined $header; |
d1f3479f | 53 | |
390bf171 MM |
54 | if ($^O =~ /MSWin(32|64)/) { |
55 | # The Win32 (and Win64) build process expects to be run from | |
56 | # bleadperl/Win32 | |
57 | chdir "Win32" | |
58 | or die "Couldn't chdir to win32: $!"; | |
59 | }; | |
60 | ||
d1f3479f NC |
61 | open my $out, '>', $trysource or die "Can't open $trysource: $!"; |
62 | ||
d5f33267 MHM |
63 | my $sentinel = "$macro expands to"; |
64 | ||
ae2e176f NC |
65 | # These two are included from perl.h, and perl.h sometimes redefines their |
66 | # macros. So no need to include them. | |
67 | my %done_header = ('embed.h' => 1, 'embedvar.h' => 1); | |
8553b68c NC |
68 | |
69 | sub do_header { | |
70 | my $header = shift; | |
71 | return if $done_header{$header}++; | |
72 | print $out qq{#include "$header"\n}; | |
73 | } | |
74 | ||
75 | print $out <<'EOF' if $opt{X}; | |
76 | /* Need to do this like this, as cflags.sh sets it for us come what may. */ | |
77 | #undef PERL_CORE | |
78 | ||
4784c5e8 NC |
79 | EOF |
80 | ||
8553b68c NC |
81 | do_header('EXTERN.h'); |
82 | do_header('perl.h'); | |
83 | do_header($header); | |
84 | do_header('XSUB.h') if $opt{X}; | |
4784c5e8 NC |
85 | |
86 | print $out <<"EOF"; | |
be4f373d | 87 | #line 4 "$sentinel" |
d1f3479f NC |
88 | $macro$args |
89 | EOF | |
90 | ||
91 | close $out or die "Can't close $trysource: $!"; | |
92 | ||
2c949eae MM |
93 | print "doing: $Config{make} $tryout\n" if $opt{v}; |
94 | my $cmd = "$Config{make} $tryout"; | |
95 | system( $cmd ) == 0 | |
96 | or die "Couldn't launch [$cmd]: $! / $?"; | |
d1f3479f | 97 | |
a93e78e3 | 98 | # if user wants 'indent' formatting .. |
27c6397c NC |
99 | my $out_fh; |
100 | ||
101 | if ($opt{f} || $opt{F}) { | |
102 | # a: indent is a well behaved filter when given 0 arguments, reading from | |
103 | # stdin and writing to stdout | |
104 | # b: all our braces should be balanced, indented back to column 0, in the | |
105 | # headers, hence everything before our #line directive can be ignored | |
106 | # | |
107 | # We can take advantage of this to reduce the work to indent. | |
108 | ||
109 | my $indent_command = $opt{f} ? 'indent' : $opt{F}; | |
110 | ||
111 | if (defined $opt{I}) { | |
112 | $indent_command .= " $opt{I}"; | |
113 | } | |
114 | open $out_fh, '|-', $indent_command or die $?; | |
115 | } else { | |
116 | $out_fh = \*STDOUT; | |
117 | } | |
a93e78e3 | 118 | |
390bf171 MM |
119 | { |
120 | open my $fh, '<', $tryout or die "Can't open $tryout: $!"; | |
d1f3479f | 121 | |
390bf171 MM |
122 | while (<$fh>) { |
123 | print $out_fh $_ if /$sentinel/o .. 1; | |
124 | } | |
125 | }; | |
d1f3479f | 126 | |
a93e78e3 JC |
127 | unless ($opt{k}) { |
128 | foreach($trysource, $tryout) { | |
390bf171 | 129 | die "Can't unlink $_: $!" unless unlink $_; |
a93e78e3 | 130 | } |
d1f3479f | 131 | } |
d5f33267 MHM |
132 | |
133 | __END__ | |
134 | ||
135 | =head1 NAME | |
136 | ||
137 | expand-macro.pl - expand C macros using the C preprocessor | |
138 | ||
139 | =head1 SYNOPSIS | |
140 | ||
141 | expand-macro.pl [options] [ < macro-name | macro-expression | - > [headers] ] | |
142 | ||
143 | options: | |
144 | -f use 'indent' to format output | |
145 | -F <tool> use <tool> to format output (instead of -f) | |
146 | -e erase try.[ic] instead of failing when they're present (errdetect) | |
147 | -k keep them after generating (for handy inspection) | |
148 | -v verbose | |
149 | -I <indent-opts> passed into indent | |
8553b68c | 150 | -X include "XSUB.h" (and undefine PERL_CORE) |
d5f33267 MHM |
151 | |
152 | =cut |