[1049] | 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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