[db55493] | 1 | #!/usr/bin/perl |
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| 2 | |
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| 3 | # Transform K&R C function definitions into ANSI equivalent. |
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| 4 | # |
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| 5 | # Author: Paul Marquess |
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| 6 | # Version: 1.0 |
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| 7 | # Date: 3 October 2006 |
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| 8 | |
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| 9 | # TODO |
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| 10 | # |
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| 11 | # Asumes no function pointer parameters. unless they are typedefed. |
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| 12 | # Assumes no literal strings that look like function definitions |
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| 13 | # Assumes functions start at the beginning of a line |
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| 14 | |
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| 15 | use strict; |
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| 16 | use warnings; |
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| 17 | |
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| 18 | local $/; |
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| 19 | $_ = <>; |
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| 20 | |
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| 21 | my $sp = qr{ \s* (?: /\* .*? \*/ )? \s* }x; # assume no nested comments |
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| 22 | |
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| 23 | my $d1 = qr{ $sp (?: [\w\*\s]+ $sp)* $sp \w+ $sp [\[\]\s]* $sp }x ; |
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| 24 | my $decl = qr{ $sp (?: \w+ $sp )+ $d1 }xo ; |
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| 25 | my $dList = qr{ $sp $decl (?: $sp , $d1 )* $sp ; $sp }xo ; |
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| 26 | |
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| 27 | |
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| 28 | while (s/^ |
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| 29 | ( # Start $1 |
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| 30 | ( # Start $2 |
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| 31 | .*? # Minimal eat content |
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| 32 | ( ^ \w [\w\s\*]+ ) # $3 -- function name |
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| 33 | \s* # optional whitespace |
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| 34 | ) # $2 - Matched up to before parameter list |
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| 35 | |
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| 36 | \( \s* # Literal "(" + optional whitespace |
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| 37 | ( [^\)]+ ) # $4 - one or more anythings except ")" |
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| 38 | \s* \) # optional whitespace surrounding a Literal ")" |
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| 39 | |
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| 40 | ( (?: $dList )+ ) # $5 |
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| 41 | |
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| 42 | $sp ^ { # literal "{" at start of line |
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| 43 | ) # Remember to $1 |
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| 44 | //xsom |
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| 45 | ) |
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| 46 | { |
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| 47 | my $all = $1 ; |
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| 48 | my $prefix = $2; |
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| 49 | my $param_list = $4 ; |
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| 50 | my $params = $5; |
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| 51 | |
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| 52 | StripComments($params); |
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| 53 | StripComments($param_list); |
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| 54 | $param_list =~ s/^\s+//; |
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| 55 | $param_list =~ s/\s+$//; |
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| 56 | |
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| 57 | my $i = 0 ; |
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| 58 | my %pList = map { $_ => $i++ } |
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| 59 | split /\s*,\s*/, $param_list; |
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| 60 | my $pMatch = '(\b' . join('|', keys %pList) . '\b)\W*$' ; |
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| 61 | |
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| 62 | my @params = split /\s*;\s*/, $params; |
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| 63 | my @outParams = (); |
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| 64 | foreach my $p (@params) |
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| 65 | { |
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| 66 | if ($p =~ /,/) |
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| 67 | { |
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| 68 | my @bits = split /\s*,\s*/, $p; |
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| 69 | my $first = shift @bits; |
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| 70 | $first =~ s/^\s*//; |
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| 71 | push @outParams, $first; |
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| 72 | $first =~ /^(\w+\s*)/; |
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| 73 | my $type = $1 ; |
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| 74 | push @outParams, map { $type . $_ } @bits; |
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| 75 | } |
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| 76 | else |
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| 77 | { |
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| 78 | $p =~ s/^\s+//; |
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| 79 | push @outParams, $p; |
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| 80 | } |
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| 81 | } |
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| 82 | |
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| 83 | |
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| 84 | my %tmp = map { /$pMatch/; $_ => $pList{$1} } |
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| 85 | @outParams ; |
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| 86 | |
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| 87 | @outParams = map { " $_" } |
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| 88 | sort { $tmp{$a} <=> $tmp{$b} } |
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| 89 | @outParams ; |
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| 90 | |
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| 91 | print $prefix ; |
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| 92 | print "(\n" . join(",\n", @outParams) . ")\n"; |
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| 93 | print "{" ; |
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| 94 | |
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| 95 | } |
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| 96 | |
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| 97 | # Output any trailing code. |
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| 98 | print ; |
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| 99 | exit 0; |
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| 100 | |
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| 101 | |
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| 102 | sub StripComments |
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| 103 | { |
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| 104 | |
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| 105 | no warnings; |
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| 106 | |
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| 107 | # Strip C & C++ coments |
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| 108 | # From the perlfaq |
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| 109 | $_[0] =~ |
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| 110 | |
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| 111 | s{ |
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| 112 | /\* ## Start of /* ... */ comment |
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| 113 | [^*]*\*+ ## Non-* followed by 1-or-more *'s |
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| 114 | ( |
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| 115 | [^/*][^*]*\*+ |
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| 116 | )* ## 0-or-more things which don't start with / |
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| 117 | ## but do end with '*' |
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| 118 | / ## End of /* ... */ comment |
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| 119 | |
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| 120 | | ## OR C++ Comment |
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| 121 | // ## Start of C++ comment // |
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| 122 | [^\n]* ## followed by 0-or-more non end of line characters |
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| 123 | |
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| 124 | | ## OR various things which aren't comments: |
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| 125 | |
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| 126 | ( |
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| 127 | " ## Start of " ... " string |
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| 128 | ( |
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| 129 | \\. ## Escaped char |
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| 130 | | ## OR |
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| 131 | [^"\\] ## Non "\ |
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| 132 | )* |
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| 133 | " ## End of " ... " string |
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| 134 | |
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| 135 | | ## OR |
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| 136 | |
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| 137 | ' ## Start of ' ... ' string |
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| 138 | ( |
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| 139 | \\. ## Escaped char |
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| 140 | | ## OR |
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| 141 | [^'\\] ## Non '\ |
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| 142 | )* |
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| 143 | ' ## End of ' ... ' string |
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| 144 | |
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| 145 | | ## OR |
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| 146 | |
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| 147 | . ## Anything other char |
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| 148 | [^/"'\\]* ## Chars which doesn't start a comment, string or escape |
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| 149 | ) |
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| 150 | }{$2}gxs; |
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| 151 | |
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| 152 | } |
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