Commit | Line | Data |
a231da50 |
1 | package Data::Dumper::ToXS; |
2 | |
3 | our (%ix, %seen); |
4 | |
c77361b0 |
5 | sub _newix { $_[0].'['.($ix{$_[0]}++).']' } |
6 | sub _getglob { \*{$_[0]} } |
a231da50 |
7 | |
8 | use B qw(svref_2object cstring); |
9 | use Scalar::Util qw(refaddr); |
10 | use Moo; |
11 | |
12 | has target_package => (is => 'ro', required => 1); |
13 | |
14 | has _to_generate => (is => 'ro', default => sub { [] }); |
15 | |
16 | sub add_generator { |
17 | my ($self, $name, $ref) = @_; |
18 | die "Generation target must be a reference" unless ref($ref); |
19 | push(@{$self->_to_generate}, [ $name => $ref ]); |
20 | } |
21 | |
22 | sub xs_code { |
23 | my ($self) = @_; |
24 | my @do = @{$self->_to_generate}; |
25 | join "\n\n", $self->_preamble, |
26 | (map $self->_generate_target(@$_), @do), |
27 | $self->_package_start($self->target_package), |
28 | (map $self->_generate_xsub($_->[0]), @do); |
29 | } |
30 | |
31 | sub _preamble { |
32 | <<'END'; |
33 | #define PERL_NO_GET_CONTEXT |
34 | #include "EXTERN.h" |
35 | #include "perl.h" |
36 | #include "XSUB.h" |
37 | |
38 | END |
39 | } |
40 | |
41 | sub _package_start { |
42 | my ($self, $package) = @_; |
43 | <<"END"; |
44 | MODULE = ${package} PACKAGE = ${package} |
45 | |
46 | PROTOTYPES: DISABLE |
47 | |
48 | END |
49 | } |
50 | |
51 | sub _generate_xsub { |
52 | my ($self, $name) = @_; |
53 | <<"END"; |
54 | SV * |
55 | ${name}() |
56 | CODE: |
57 | RETVAL = ${name}(aTHX); |
58 | OUTPUT: |
59 | RETVAL |
60 | END |
61 | } |
62 | |
63 | sub _generate_target { |
64 | my ($self, $name, $ref) = @_; |
65 | local %ix = map +($_ => 0), qw(av hv sv); |
66 | local %seen; |
c77361b0 |
67 | my $first = _newix('sv'); |
a231da50 |
68 | my $body = $self->_dump_svrv($first, $ref); |
69 | my $vars = join '', map +( |
70 | $ix{$_} ? " ${\uc}* ${_}[$ix{$_}];\n" : "" |
71 | ), qw(av hv sv); |
72 | <<"END"; |
73 | SV * ${name} (pTHX) |
74 | { |
75 | ${vars}${body} return ${first}; |
76 | } |
77 | END |
78 | } |
79 | |
80 | sub _dump_svrv { |
81 | my ($self, $ix, $ref) = @_; |
82 | my $r = ref($ref); |
83 | if ($seen{$ref}) { |
84 | # already seen this reference so make a copy |
85 | " ${ix} = newSVsv($seen{$ref});\n"; |
86 | } else { |
87 | $seen{$ref} = $ix; |
88 | if ($r eq 'SCALAR') { |
c77361b0 |
89 | my $t_ix = _newix('sv'); |
a231da50 |
90 | join '', |
91 | $self->_dump_sv($t_ix, $ref), |
92 | " ${ix} = newRV_noinc(${t_ix});\n"; |
93 | } elsif ($r eq 'HASH') { |
c77361b0 |
94 | my $t_ix = _newix('hv'); |
a231da50 |
95 | join '', |
96 | $self->_dump_hv($t_ix, $ref), |
97 | " ${ix} = newRV_noinc((SV *)${t_ix});\n"; |
98 | } elsif ($r eq 'ARRAY') { |
c77361b0 |
99 | my $t_ix = _newix('av'); |
a231da50 |
100 | join '', |
101 | $self->_dump_av($t_ix, $ref), |
102 | " ${ix} = newRV_noinc((SV *)${t_ix});\n"; |
103 | } elsif ($r eq 'REF') { |
c77361b0 |
104 | my $t_ix = _newix('sv'); |
a231da50 |
105 | join '', |
106 | $self->_dump_svrv($t_ix, $$ref), |
107 | " ${ix} = newRV_noinc(${t_ix});\n"; |
c77361b0 |
108 | } elsif ($r eq 'CODE') { |
109 | my $full_name = join '::', |
110 | map $_->NAME, map +($_->GV->STASH, $_->GV), svref_2object($ref); |
111 | if (*{_getglob($full_name)}{CODE}||'' eq $ref) { |
112 | # GV_ADD strikes me as more likely to DWIM than to simply blow up |
113 | # if the generated routine gets called before the method is declared. |
114 | " ${ix} = newRV_inc((SV *) get_cv(${\cstring $full_name}, GV_ADD));\n"; |
115 | } else { |
116 | die "Can't find ${ref} at ${full_name}"; |
117 | } |
a231da50 |
118 | } else { |
119 | die "Can't handle reftype ${r}"; |
120 | } |
121 | } |
122 | } |
123 | |
124 | sub _dump_sv { |
125 | my ($self, $ix, $ref) = @_; |
126 | if (ref($$ref)) { |
127 | $self->_dump_svrv($ix, $$ref); |
128 | } else { |
129 | # Not a reference. What are we dumping? |
130 | my $sv = svref_2object($ref); |
131 | if (!defined($$ref)) { |
132 | " ${ix} = newSVsv(&PL_sv_undef);\n"; |
133 | } elsif ($sv->isa('B::IV')) { |
134 | " ${ix} = newSViv(".$sv->int_value.");\n"; |
135 | } elsif ($sv->isa('B::NV')) { |
136 | " ${ix} = newSVnv(".$sv->NV.");\n"; |
137 | } elsif ($sv->isa('B::PV')) { |
138 | " ${ix} = newSVpvs(".cstring($$ref).");\n"; |
139 | } else { |
140 | die "Unsure how to dump ".$$ref; |
141 | } |
142 | } |
143 | } |
144 | |
145 | sub _dump_hv { |
146 | my ($self, $ix, $ref) = @_; |
147 | join '', |
148 | " ${ix} = newHV();\n", |
149 | map { |
c77361b0 |
150 | my $t_ix = _newix('sv'); |
a231da50 |
151 | ($self->_dump_sv($t_ix, \($ref->{$_})), |
152 | " hv_stores(${ix}, ${\cstring $_}, ${t_ix});\n") |
153 | } sort keys %$ref; |
154 | } |
155 | |
156 | sub _dump_av { |
157 | my ($self, $ix, $ref) = @_; |
158 | join '', |
159 | " ${ix} = newAV();\n", |
160 | map { |
c77361b0 |
161 | my $t_ix = _newix('sv'); |
a231da50 |
162 | $self->_dump_sv($t_ix, \($ref->[$_])), |
163 | " av_push(${ix}, ${t_ix});\n" |
164 | } 0 .. $#$ref; |
165 | } |
166 | |
167 | 1; |