| 1 | #!/usr/bin/perl |
| 2 | |
| 3 | # Transform K&R C function definitions into ANSI equivalent. |
| 4 | # |
| 5 | # Author: Paul Marquess |
| 6 | # Version: 1.0 |
| 7 | # Date: 3 October 2006 |
| 8 | |
| 9 | # TODO |
| 10 | # |
| 11 | # Asumes no function pointer parameters. unless they are typedefed. |
| 12 | # Assumes no literal strings that look like function definitions |
| 13 | # Assumes functions start at the beginning of a line |
| 14 | |
| 15 | use strict; |
| 16 | use warnings; |
| 17 | |
| 18 | local $/; |
| 19 | $_ = <>; |
| 20 | |
| 21 | my $sp = qr{ \s* (?: /\* .*? \*/ )? \s* }x; # assume no nested comments |
| 22 | |
| 23 | my $d1 = qr{ $sp (?: [\w\*\s]+ $sp)* $sp \w+ $sp [\[\]\s]* $sp }x ; |
| 24 | my $decl = qr{ $sp (?: \w+ $sp )+ $d1 }xo ; |
| 25 | my $dList = qr{ $sp $decl (?: $sp , $d1 )* $sp ; $sp }xo ; |
| 26 | |
| 27 | |
| 28 | while (s/^ |
| 29 | ( # Start $1 |
| 30 | ( # Start $2 |
| 31 | .*? # Minimal eat content |
| 32 | ( ^ \w [\w\s\*]+ ) # $3 -- function name |
| 33 | \s* # optional whitespace |
| 34 | ) # $2 - Matched up to before parameter list |
| 35 | |
| 36 | \( \s* # Literal "(" + optional whitespace |
| 37 | ( [^\)]+ ) # $4 - one or more anythings except ")" |
| 38 | \s* \) # optional whitespace surrounding a Literal ")" |
| 39 | |
| 40 | ( (?: $dList )+ ) # $5 |
| 41 | |
| 42 | $sp ^ { # literal "{" at start of line |
| 43 | ) # Remember to $1 |
| 44 | //xsom |
| 45 | ) |
| 46 | { |
| 47 | my $all = $1 ; |
| 48 | my $prefix = $2; |
| 49 | my $param_list = $4 ; |
| 50 | my $params = $5; |
| 51 | |
| 52 | StripComments($params); |
| 53 | StripComments($param_list); |
| 54 | $param_list =~ s/^\s+//; |
| 55 | $param_list =~ s/\s+$//; |
| 56 | |
| 57 | my $i = 0 ; |
| 58 | my %pList = map { $_ => $i++ } |
| 59 | split /\s*,\s*/, $param_list; |
| 60 | my $pMatch = '(\b' . join('|', keys %pList) . '\b)\W*$' ; |
| 61 | |
| 62 | my @params = split /\s*;\s*/, $params; |
| 63 | my @outParams = (); |
| 64 | foreach my $p (@params) |
| 65 | { |
| 66 | if ($p =~ /,/) |
| 67 | { |
| 68 | my @bits = split /\s*,\s*/, $p; |
| 69 | my $first = shift @bits; |
| 70 | $first =~ s/^\s*//; |
| 71 | push @outParams, $first; |
| 72 | $first =~ /^(\w+\s*)/; |
| 73 | my $type = $1 ; |
| 74 | push @outParams, map { $type . $_ } @bits; |
| 75 | } |
| 76 | else |
| 77 | { |
| 78 | $p =~ s/^\s+//; |
| 79 | push @outParams, $p; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | |
| 84 | my %tmp = map { /$pMatch/; $_ => $pList{$1} } |
| 85 | @outParams ; |
| 86 | |
| 87 | @outParams = map { " $_" } |
| 88 | sort { $tmp{$a} <=> $tmp{$b} } |
| 89 | @outParams ; |
| 90 | |
| 91 | print $prefix ; |
| 92 | print "(\n" . join(",\n", @outParams) . ")\n"; |
| 93 | print "{" ; |
| 94 | |
| 95 | } |
| 96 | |
| 97 | # Output any trailing code. |
| 98 | print ; |
| 99 | exit 0; |
| 100 | |
| 101 | |
| 102 | sub StripComments |
| 103 | { |
| 104 | |
| 105 | no warnings; |
| 106 | |
| 107 | # Strip C & C++ coments |
| 108 | # From the perlfaq |
| 109 | $_[0] =~ |
| 110 | |
| 111 | s{ |
| 112 | /\* ## Start of /* ... */ comment |
| 113 | [^*]*\*+ ## Non-* followed by 1-or-more *'s |
| 114 | ( |
| 115 | [^/*][^*]*\*+ |
| 116 | )* ## 0-or-more things which don't start with / |
| 117 | ## but do end with '*' |
| 118 | / ## End of /* ... */ comment |
| 119 | |
| 120 | | ## OR C++ Comment |
| 121 | // ## Start of C++ comment // |
| 122 | [^\n]* ## followed by 0-or-more non end of line characters |
| 123 | |
| 124 | | ## OR various things which aren't comments: |
| 125 | |
| 126 | ( |
| 127 | " ## Start of " ... " string |
| 128 | ( |
| 129 | \\. ## Escaped char |
| 130 | | ## OR |
| 131 | [^"\\] ## Non "\ |
| 132 | )* |
| 133 | " ## End of " ... " string |
| 134 | |
| 135 | | ## OR |
| 136 | |
| 137 | ' ## Start of ' ... ' string |
| 138 | ( |
| 139 | \\. ## Escaped char |
| 140 | | ## OR |
| 141 | [^'\\] ## Non '\ |
| 142 | )* |
| 143 | ' ## End of ' ... ' string |
| 144 | |
| 145 | | ## OR |
| 146 | |
| 147 | . ## Anything other char |
| 148 | [^/"'\\]* ## Chars which doesn't start a comment, string or escape |
| 149 | ) |
| 150 | }{$2}gxs; |
| 151 | |
| 152 | } |