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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