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152 lines
3.8 KiB
152 lines
3.8 KiB
#!/usr/bin/perl
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# Transform K&R C function definitions into ANSI equivalent.
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#
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# Author: Paul Marquess
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# Version: 1.0
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# Date: 3 October 2006
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# TODO
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#
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# Asumes no function pointer parameters. unless they are typedefed.
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# Assumes no literal strings that look like function definitions
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# Assumes functions start at the beginning of a line
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use strict;
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use warnings;
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local $/;
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$_ = <>;
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my $sp = qr{ \s* (?: /\* .*? \*/ )? \s* }x; # assume no nested comments
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my $d1 = qr{ $sp (?: [\w\*\s]+ $sp)* $sp \w+ $sp [\[\]\s]* $sp }x ;
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my $decl = qr{ $sp (?: \w+ $sp )+ $d1 }xo ;
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my $dList = qr{ $sp $decl (?: $sp , $d1 )* $sp ; $sp }xo ;
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while (s/^
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( # Start $1
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( # Start $2
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.*? # Minimal eat content
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( ^ \w [\w\s\*]+ ) # $3 -- function name
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\s* # optional whitespace
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) # $2 - Matched up to before parameter list
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\( \s* # Literal "(" + optional whitespace
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( [^\)]+ ) # $4 - one or more anythings except ")"
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\s* \) # optional whitespace surrounding a Literal ")"
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( (?: $dList )+ ) # $5
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$sp ^ { # literal "{" at start of line
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) # Remember to $1
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//xsom
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)
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{
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my $all = $1 ;
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my $prefix = $2;
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my $param_list = $4 ;
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my $params = $5;
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StripComments($params);
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StripComments($param_list);
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$param_list =~ s/^\s+//;
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$param_list =~ s/\s+$//;
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my $i = 0 ;
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my %pList = map { $_ => $i++ }
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split /\s*,\s*/, $param_list;
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my $pMatch = '(\b' . join('|', keys %pList) . '\b)\W*$' ;
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my @params = split /\s*;\s*/, $params;
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my @outParams = ();
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foreach my $p (@params)
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{
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if ($p =~ /,/)
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{
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my @bits = split /\s*,\s*/, $p;
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my $first = shift @bits;
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$first =~ s/^\s*//;
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push @outParams, $first;
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$first =~ /^(\w+\s*)/;
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my $type = $1 ;
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push @outParams, map { $type . $_ } @bits;
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}
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else
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{
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$p =~ s/^\s+//;
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push @outParams, $p;
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}
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}
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my %tmp = map { /$pMatch/; $_ => $pList{$1} }
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@outParams ;
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@outParams = map { " $_" }
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sort { $tmp{$a} <=> $tmp{$b} }
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@outParams ;
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print $prefix ;
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print "(\n" . join(",\n", @outParams) . ")\n";
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print "{" ;
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}
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# Output any trailing code.
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print ;
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exit 0;
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sub StripComments
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{
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no warnings;
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# Strip C & C++ coments
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# From the perlfaq
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$_[0] =~
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s{
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/\* ## Start of /* ... */ comment
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[^*]*\*+ ## Non-* followed by 1-or-more *'s
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(
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[^/*][^*]*\*+
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)* ## 0-or-more things which don't start with /
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## but do end with '*'
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/ ## End of /* ... */ comment
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| ## OR C++ Comment
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// ## Start of C++ comment //
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[^\n]* ## followed by 0-or-more non end of line characters
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| ## OR various things which aren't comments:
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(
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" ## Start of " ... " string
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(
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\\. ## Escaped char
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| ## OR
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[^"\\] ## Non "\
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)*
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" ## End of " ... " string
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| ## OR
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' ## Start of ' ... ' string
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(
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\\. ## Escaped char
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| ## OR
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[^'\\] ## Non '\
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)*
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' ## End of ' ... ' string
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| ## OR
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. ## Anything other char
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[^/"'\\]* ## Chars which doesn't start a comment, string or escape
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)
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}{$2}gxs;
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}
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