Commit | Line | Data |
a231da50 |
1 | package Data::Dumper::ToXS; |
2 | |
3 | our (%ix, %seen); |
4 | |
5 | sub newix { $_[0].'['.($ix{$_[0]}++).']' } |
6 | |
7 | use B qw(svref_2object cstring); |
8 | use Scalar::Util qw(refaddr); |
9 | use Moo; |
10 | |
11 | has target_package => (is => 'ro', required => 1); |
12 | |
13 | has _to_generate => (is => 'ro', default => sub { [] }); |
14 | |
15 | sub add_generator { |
16 | my ($self, $name, $ref) = @_; |
17 | die "Generation target must be a reference" unless ref($ref); |
18 | push(@{$self->_to_generate}, [ $name => $ref ]); |
19 | } |
20 | |
21 | sub xs_code { |
22 | my ($self) = @_; |
23 | my @do = @{$self->_to_generate}; |
24 | join "\n\n", $self->_preamble, |
25 | (map $self->_generate_target(@$_), @do), |
26 | $self->_package_start($self->target_package), |
27 | (map $self->_generate_xsub($_->[0]), @do); |
28 | } |
29 | |
30 | sub _preamble { |
31 | <<'END'; |
32 | #define PERL_NO_GET_CONTEXT |
33 | #include "EXTERN.h" |
34 | #include "perl.h" |
35 | #include "XSUB.h" |
36 | |
37 | END |
38 | } |
39 | |
40 | sub _package_start { |
41 | my ($self, $package) = @_; |
42 | <<"END"; |
43 | MODULE = ${package} PACKAGE = ${package} |
44 | |
45 | PROTOTYPES: DISABLE |
46 | |
47 | END |
48 | } |
49 | |
50 | sub _generate_xsub { |
51 | my ($self, $name) = @_; |
52 | <<"END"; |
53 | SV * |
54 | ${name}() |
55 | CODE: |
56 | RETVAL = ${name}(aTHX); |
57 | OUTPUT: |
58 | RETVAL |
59 | END |
60 | } |
61 | |
62 | sub _generate_target { |
63 | my ($self, $name, $ref) = @_; |
64 | local %ix = map +($_ => 0), qw(av hv sv); |
65 | local %seen; |
66 | my $first = newix('sv'); |
67 | my $body = $self->_dump_svrv($first, $ref); |
68 | my $vars = join '', map +( |
69 | $ix{$_} ? " ${\uc}* ${_}[$ix{$_}];\n" : "" |
70 | ), qw(av hv sv); |
71 | <<"END"; |
72 | SV * ${name} (pTHX) |
73 | { |
74 | ${vars}${body} return ${first}; |
75 | } |
76 | END |
77 | } |
78 | |
79 | sub _dump_svrv { |
80 | my ($self, $ix, $ref) = @_; |
81 | my $r = ref($ref); |
82 | if ($seen{$ref}) { |
83 | # already seen this reference so make a copy |
84 | " ${ix} = newSVsv($seen{$ref});\n"; |
85 | } else { |
86 | $seen{$ref} = $ix; |
87 | if ($r eq 'SCALAR') { |
88 | my $t_ix = newix('sv'); |
89 | join '', |
90 | $self->_dump_sv($t_ix, $ref), |
91 | " ${ix} = newRV_noinc(${t_ix});\n"; |
92 | } elsif ($r eq 'HASH') { |
93 | my $t_ix = newix('hv'); |
94 | join '', |
95 | $self->_dump_hv($t_ix, $ref), |
96 | " ${ix} = newRV_noinc((SV *)${t_ix});\n"; |
97 | } elsif ($r eq 'ARRAY') { |
98 | my $t_ix = newix('av'); |
99 | join '', |
100 | $self->_dump_av($t_ix, $ref), |
101 | " ${ix} = newRV_noinc((SV *)${t_ix});\n"; |
102 | } elsif ($r eq 'REF') { |
103 | my $t_ix = newix('sv'); |
104 | join '', |
105 | $self->_dump_svrv($t_ix, $$ref), |
106 | " ${ix} = newRV_noinc(${t_ix});\n"; |
107 | } else { |
108 | die "Can't handle reftype ${r}"; |
109 | } |
110 | } |
111 | } |
112 | |
113 | sub _dump_sv { |
114 | my ($self, $ix, $ref) = @_; |
115 | if (ref($$ref)) { |
116 | $self->_dump_svrv($ix, $$ref); |
117 | } else { |
118 | # Not a reference. What are we dumping? |
119 | my $sv = svref_2object($ref); |
120 | if (!defined($$ref)) { |
121 | " ${ix} = newSVsv(&PL_sv_undef);\n"; |
122 | } elsif ($sv->isa('B::IV')) { |
123 | " ${ix} = newSViv(".$sv->int_value.");\n"; |
124 | } elsif ($sv->isa('B::NV')) { |
125 | " ${ix} = newSVnv(".$sv->NV.");\n"; |
126 | } elsif ($sv->isa('B::PV')) { |
127 | " ${ix} = newSVpvs(".cstring($$ref).");\n"; |
128 | } else { |
129 | die "Unsure how to dump ".$$ref; |
130 | } |
131 | } |
132 | } |
133 | |
134 | sub _dump_hv { |
135 | my ($self, $ix, $ref) = @_; |
136 | join '', |
137 | " ${ix} = newHV();\n", |
138 | map { |
139 | my $t_ix = newix('sv'); |
140 | ($self->_dump_sv($t_ix, \($ref->{$_})), |
141 | " hv_stores(${ix}, ${\cstring $_}, ${t_ix});\n") |
142 | } sort keys %$ref; |
143 | } |
144 | |
145 | sub _dump_av { |
146 | my ($self, $ix, $ref) = @_; |
147 | join '', |
148 | " ${ix} = newAV();\n", |
149 | map { |
150 | my $t_ix = newix('sv'); |
151 | $self->_dump_sv($t_ix, \($ref->[$_])), |
152 | " av_push(${ix}, ${t_ix});\n" |
153 | } 0 .. $#$ref; |
154 | } |
155 | |
156 | 1; |