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#!/usr/bin/perl |
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|
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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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|
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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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|
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use strict; |
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use warnings; |
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|
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local $/; |
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$_ = <>; |
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|
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my $sp = qr{ \s* (?: /\* .*? \*/ )? \s* }x; # assume no nested comments |
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|
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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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|
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|
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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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|
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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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|
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( (?: $dList )+ ) # $5 |
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|
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$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 = $5; |
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|
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StripComments($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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|
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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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|
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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, $p; |
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} |
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} |
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|
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|
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my %tmp = map { /$pMatch/; $_ => $pList{$1} } |
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@outParams ; |
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|
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@outParams = map { " $_" } |
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sort { $tmp{$a} <=> $tmp{$b} } |
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@outParams ; |
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|
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print $prefix ; |
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print "(\n" . join(",\n", @outParams) . ")\n"; |
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print "{" ; |
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|
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} |
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|
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# Output any trailing code. |
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print ; |
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exit 0; |
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|
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|
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sub StripComments |
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{ |
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|
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no warnings; |
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|
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# Strip C & C++ coments |
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# From the perlfaq |
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$_[0] =~ |
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|
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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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|
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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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|
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| ## OR various things which aren't comments: |
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|
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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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|
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| ## OR |
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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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|
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| ## OR |
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|
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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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} |
