Commit | Line | Data |
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cdde42af NC |
1 | #!/usr/bin/perl -w |
2 | use strict; | |
3 | ||
4 | # read embed.fnc and regen/opcodes, needed by regen/embed.pl and makedef.pl | |
5 | ||
6 | require 5.004; # keep this compatible, an old perl is all we may have before | |
7 | # we build the new one | |
8 | ||
9 | # Records the current pre-processor state: | |
10 | my @state; | |
11 | # Nested structure to group functions by the pre-processor conditions that | |
12 | # control when they are compiled: | |
13 | my %groups; | |
14 | ||
15 | sub current_group { | |
16 | my $group = \%groups; | |
17 | # Nested #if blocks are effectively &&ed together | |
18 | # For embed.fnc, ordering within the && isn't relevant, so we can | |
19 | # sort them to try to group more functions together. | |
20 | foreach (sort @state) { | |
21 | $group->{$_} ||= {}; | |
22 | $group = $group->{$_}; | |
23 | } | |
24 | return $group->{''} ||= []; | |
25 | } | |
26 | ||
27 | sub add_level { | |
28 | my ($level, $indent, $wanted) = @_; | |
29 | my $funcs = $level->{''}; | |
30 | my @entries; | |
31 | if ($funcs) { | |
32 | if (!defined $wanted) { | |
33 | @entries = @$funcs; | |
34 | } else { | |
35 | foreach (@$funcs) { | |
36 | if ($_->[0] =~ /A/) { | |
37 | push @entries, $_ if $wanted eq 'A'; | |
38 | } elsif ($_->[0] =~ /E/) { | |
39 | push @entries, $_ if $wanted eq 'E'; | |
40 | } else { | |
41 | push @entries, $_ if $wanted eq ''; | |
42 | } | |
43 | } | |
44 | } | |
45 | @entries = sort {$a->[2] cmp $b->[2]} @entries; | |
46 | } | |
47 | foreach (sort grep {length $_} keys %$level) { | |
48 | my @conditional = add_level($level->{$_}, $indent . ' ', $wanted); | |
49 | push @entries, | |
50 | ["#${indent}if $_"], @conditional, ["#${indent}endif"] | |
51 | if @conditional; | |
52 | } | |
53 | return @entries; | |
54 | } | |
55 | ||
56 | sub setup_embed { | |
57 | my $prefix = shift || ''; | |
1ae6ead9 | 58 | open IN, '<', $prefix . 'embed.fnc' or die $!; |
cdde42af NC |
59 | |
60 | my @embed; | |
c0b58684 DM |
61 | my %seen; |
62 | my $macro_depth = 0; | |
cdde42af NC |
63 | |
64 | while (<IN>) { | |
65 | chomp; | |
66 | next if /^:/; | |
67 | next if /^$/; | |
68 | while (s|\\$||) { | |
69 | $_ .= <IN>; | |
70 | chomp; | |
71 | } | |
72 | s/\s+$//; | |
73 | my @args; | |
74 | if (/^\s*(#|$)/) { | |
75 | @args = $_; | |
76 | } | |
77 | else { | |
78 | @args = split /\s*\|\s*/, $_; | |
79 | } | |
c0b58684 DM |
80 | if (@args == 1) { |
81 | if ($args[0] !~ /^#\s*(?:if|ifdef|ifndef|else|endif)/) { | |
82 | die "Illegal line $. '$args[0]' in embed.fnc"; | |
83 | } | |
84 | $macro_depth++ if $args[0] =~/^#\s*if(n?def)?\b/; | |
85 | $macro_depth-- if $args[0] =~/^#\s*endif\b/; | |
86 | die "More #endif than #if in embed.fnc:$." if $macro_depth < 0; | |
cdde42af | 87 | } |
c0b58684 DM |
88 | else { |
89 | die "Illegal line (less than 3 fields) in embed.fnc:$.: $_" | |
90 | unless @args >= 3; | |
91 | my $name = $args[2]; | |
92 | # only check for duplicates outside of #if's - otherwise | |
93 | # they may be alternate definitions of the same function | |
94 | if ($macro_depth == 0) { | |
95 | die "Duplicate function name: '$name' in embed.fnc:$." | |
96 | if exists $seen{$name}; | |
97 | } | |
98 | $seen{$name} = 1; | |
99 | } | |
100 | ||
cdde42af NC |
101 | push @embed, \@args; |
102 | } | |
c0b58684 | 103 | die "More #if than #endif by the end of embed.fnc" if $macro_depth != 0; |
cdde42af NC |
104 | |
105 | close IN or die "Problem reading embed.fnc: $!"; | |
106 | ||
1ae6ead9 | 107 | open IN, '<', $prefix . 'regen/opcodes' or die $!; |
cdde42af NC |
108 | { |
109 | my %syms; | |
110 | ||
111 | while (<IN>) { | |
112 | chomp; | |
113 | next unless $_; | |
114 | next if /^#/; | |
115 | my $check = (split /\t+/, $_)[2]; | |
116 | next if $syms{$check}++; | |
117 | ||
118 | # These are all indirectly referenced by globals.c. | |
119 | push @embed, ['pR', 'OP *', $check, 'NN OP *o']; | |
120 | } | |
121 | } | |
122 | close IN or die "Problem reading regen/opcodes: $!"; | |
123 | ||
124 | # Cluster entries in embed.fnc that have the same #ifdef guards. | |
125 | # Also, split out at the top level the three classes of functions. | |
126 | # Output structure is actually the same as input structure - an | |
127 | # (ordered) list of array references, where the elements in the | |
128 | # reference determine what it is - a reference to a 1-element array is a | |
129 | # pre-processor directive, a reference to 2+ element array is a function. | |
130 | ||
131 | my $current = current_group(); | |
132 | ||
133 | foreach (@embed) { | |
134 | if (@$_ > 1) { | |
135 | push @$current, $_; | |
136 | next; | |
137 | } | |
138 | $_->[0] =~ s/^#\s+/#/; | |
139 | $_->[0] =~ /^\S*/; | |
140 | $_->[0] =~ s/^#ifdef\s+(\S+)/#if defined($1)/; | |
141 | $_->[0] =~ s/^#ifndef\s+(\S+)/#if !defined($1)/; | |
142 | if ($_->[0] =~ /^#if\s*(.*)/) { | |
143 | push @state, $1; | |
144 | } elsif ($_->[0] =~ /^#else\s*$/) { | |
145 | die "Unmatched #else in embed.fnc" unless @state; | |
146 | $state[-1] = "!($state[-1])"; | |
147 | } elsif ($_->[0] =~ m!^#endif\s*(?:/\*.*\*/)?$!) { | |
148 | die "Unmatched #endif in embed.fnc" unless @state; | |
149 | pop @state; | |
150 | } else { | |
151 | die "Unhandled pre-processor directive '$_->[0]' in embed.fnc"; | |
152 | } | |
153 | $current = current_group(); | |
154 | } | |
155 | ||
156 | return ([add_level(\%groups, '')], | |
157 | [add_level(\%groups, '', '')], # core | |
158 | [add_level(\%groups, '', 'E')], # ext | |
159 | [add_level(\%groups, '', 'A')]); # api | |
160 | } | |
161 | ||
162 | 1; |