Commit | Line | Data |
6d7fb585 |
1 | package ExtUtils::Constant::ProxySubs; |
2 | |
3 | use strict; |
64bb7586 |
4 | use vars qw($VERSION @ISA %type_to_struct %type_from_struct %type_to_sv |
6800c0cf |
5 | %type_to_C_value %type_is_a_problem %type_num_args |
6 | %type_temporary); |
6d7fb585 |
7 | use Carp; |
8 | require ExtUtils::Constant::XS; |
9 | use ExtUtils::Constant::Utils qw(C_stringify); |
10 | use ExtUtils::Constant::XS qw(%XS_TypeSet); |
11 | |
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12 | $VERSION = '0.03'; |
6d7fb585 |
13 | @ISA = 'ExtUtils::Constant::XS'; |
14 | |
15 | %type_to_struct = |
16 | ( |
17 | IV => '{const char *name; I32 namelen; IV value;}', |
64bb7586 |
18 | NV => '{const char *name; I32 namelen; NV value;}', |
19 | UV => '{const char *name; I32 namelen; UV value;}', |
49657794 |
20 | PV => '{const char *name; I32 namelen; const char *value;}', |
6f226cd7 |
21 | PVN => '{const char *name; I32 namelen; const char *value; STRLEN len;}', |
64bb7586 |
22 | YES => '{const char *name; I32 namelen;}', |
23 | NO => '{const char *name; I32 namelen;}', |
6f226cd7 |
24 | UNDEF => '{const char *name; I32 namelen;}', |
6d7fb585 |
25 | '' => '{const char *name; I32 namelen;} ', |
26 | ); |
27 | |
64bb7586 |
28 | %type_from_struct = |
29 | ( |
30 | IV => sub { $_[0] . '->value' }, |
31 | NV => sub { $_[0] . '->value' }, |
32 | UV => sub { $_[0] . '->value' }, |
49657794 |
33 | PV => sub { $_[0] . '->value' }, |
6f226cd7 |
34 | PVN => sub { $_[0] . '->value', $_[0] . '->len' }, |
64bb7586 |
35 | YES => sub {}, |
36 | NO => sub {}, |
6f226cd7 |
37 | UNDEF => sub {}, |
64bb7586 |
38 | '' => sub {}, |
39 | ); |
40 | |
6d7fb585 |
41 | %type_to_sv = |
42 | ( |
64bb7586 |
43 | IV => sub { "newSViv($_[0])" }, |
44 | NV => sub { "newSVnv($_[0])" }, |
45 | UV => sub { "newSVuv($_[0])" }, |
49657794 |
46 | PV => sub { "newSVpv($_[0], 0)" }, |
6f226cd7 |
47 | PVN => sub { "newSVpvn($_[0], $_[1])" }, |
64bb7586 |
48 | YES => sub { '&PL_sv_yes' }, |
49 | NO => sub { '&PL_sv_no' }, |
0fcb9a02 |
50 | UNDEF => sub { '&PL_sv_undef' }, |
6d7fb585 |
51 | '' => sub { '&PL_sv_yes' }, |
2ebbb0c3 |
52 | SV => sub {"SvREFCNT_inc($_[0])"}, |
6d7fb585 |
53 | ); |
54 | |
55 | %type_to_C_value = |
56 | ( |
64bb7586 |
57 | YES => sub {}, |
58 | NO => sub {}, |
0fcb9a02 |
59 | UNDEF => sub {}, |
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60 | '' => sub {}, |
61 | ); |
62 | |
64bb7586 |
63 | sub type_to_C_value { |
64 | my ($self, $type) = @_; |
65 | return $type_to_C_value{$type} || sub {return map {ref $_ ? @$_ : $_} @_}; |
66 | } |
67 | |
49657794 |
68 | # TODO - figure out if there is a clean way for the type_to_sv code to |
69 | # attempt s/sv_2mortal// and if it succeeds tell type_to_sv not to add |
70 | # SvREFCNT_inc |
6d7fb585 |
71 | %type_is_a_problem = |
72 | ( |
2ebbb0c3 |
73 | # The documentation says *mortal SV*, but we now need a non-mortal copy. |
6d7fb585 |
74 | SV => 1, |
75 | ); |
76 | |
49657794 |
77 | %type_temporary = |
78 | ( |
6f226cd7 |
79 | SV => ['SV *'], |
80 | PV => ['const char *'], |
81 | PVN => ['const char *', 'STRLEN'], |
49657794 |
82 | ); |
6f226cd7 |
83 | $type_temporary{$_} = [$_] foreach qw(IV UV NV); |
6800c0cf |
84 | |
6d7fb585 |
85 | while (my ($type, $value) = each %XS_TypeSet) { |
64bb7586 |
86 | $type_num_args{$type} |
87 | = defined $value ? ref $value ? scalar @$value : 1 : 0; |
6d7fb585 |
88 | } |
89 | $type_num_args{''} = 0; |
90 | |
91 | sub partition_names { |
92 | my ($self, $default_type, @items) = @_; |
93 | my (%found, @notfound, @trouble); |
94 | |
95 | while (my $item = shift @items) { |
96 | my $default = delete $item->{default}; |
97 | if ($default) { |
98 | # If we find a default value, convert it into a regular item and |
99 | # append it to the queue of items to process |
100 | my $default_item = {%$item}; |
101 | $default_item->{invert_macro} = 1; |
102 | $default_item->{pre} = delete $item->{def_pre}; |
103 | $default_item->{post} = delete $item->{def_post}; |
104 | $default_item->{type} = shift @$default; |
105 | $default_item->{value} = $default; |
106 | push @items, $default_item; |
107 | } else { |
108 | # It can be "not found" unless it's the default (invert the macro) |
109 | # or the "macro" is an empty string (ie no macro) |
110 | push @notfound, $item unless $item->{invert_macro} |
0fcb9a02 |
111 | or !$self->macro_to_ifdef($self->macro_from_item($item)); |
6d7fb585 |
112 | } |
113 | |
64bb7586 |
114 | if ($item->{pre} or $item->{post} or $item->{not_constant} |
115 | or $type_is_a_problem{$item->{type}}) { |
6d7fb585 |
116 | push @trouble, $item; |
117 | } else { |
118 | push @{$found{$item->{type}}}, $item; |
119 | } |
120 | } |
121 | # use Data::Dumper; print Dumper \%found; |
122 | (\%found, \@notfound, \@trouble); |
123 | } |
124 | |
125 | sub boottime_iterator { |
126 | my ($self, $type, $iterator, $hash, $subname) = @_; |
64bb7586 |
127 | my $extractor = $type_from_struct{$type}; |
128 | die "Can't find extractor code for type $type" |
129 | unless defined $extractor; |
6d7fb585 |
130 | my $generator = $type_to_sv{$type}; |
131 | die "Can't find generator code for type $type" |
132 | unless defined $generator; |
133 | |
134 | my $athx = $self->C_constant_prefix_param(); |
135 | |
64bb7586 |
136 | return sprintf <<"EOBOOT", &$generator(&$extractor($iterator)); |
6d7fb585 |
137 | while ($iterator->name) { |
138 | $subname($athx $hash, $iterator->name, |
139 | $iterator->namelen, %s); |
140 | ++$iterator; |
141 | } |
142 | EOBOOT |
143 | } |
144 | |
64bb7586 |
145 | sub name_len_value_macro { |
146 | my ($self, $item) = @_; |
147 | my $name = $item->{name}; |
148 | my $value = $item->{value}; |
149 | $value = $item->{name} unless defined $value; |
150 | |
151 | my $namelen = length $name; |
152 | if ($name =~ tr/\0-\377// != $namelen) { |
153 | # the hash API signals UTF-8 by passing the length negated. |
154 | utf8::encode($name); |
155 | $namelen = -length $name; |
156 | } |
157 | $name = C_stringify($name); |
158 | |
0fcb9a02 |
159 | my $macro = $self->macro_from_item($item); |
64bb7586 |
160 | ($name, $namelen, $value, $macro); |
161 | } |
162 | |
6d7fb585 |
163 | sub WriteConstants { |
164 | my $self = shift; |
6b43b341 |
165 | my $ARGS = {@_}; |
6d7fb585 |
166 | |
167 | my ($c_fh, $xs_fh, $c_subname, $xs_subname, $default_type, $package) |
6b43b341 |
168 | = @{$ARGS}{qw(C_FH XS_FH C_SUBNAME XS_SUBNAME DEFAULT_TYPE NAME)}; |
169 | |
170 | my $options = $ARGS->{PROXYSUBS}; |
171 | $options = {} unless ref $options; |
172 | my $explosives = $options->{croak_on_read}; |
6d7fb585 |
173 | |
174 | $xs_subname ||= 'constant'; |
175 | |
fa6eee5a |
176 | # If anyone is insane enough to suggest a package name containing % |
177 | my $package_sprintf_safe = $package; |
178 | $package_sprintf_safe =~ s/%/%%/g; |
6d7fb585 |
179 | |
180 | # All the types we see |
181 | my $what = {}; |
182 | # A hash to lookup items with. |
183 | my $items = {}; |
184 | |
185 | my @items = $self->normalise_items ({disable_utf8_duplication => 1}, |
6b43b341 |
186 | $default_type, $what, $items, |
187 | @{$ARGS->{NAMES}}); |
6d7fb585 |
188 | |
189 | # Partition the values by type. Also include any defaults in here |
190 | # Everything that doesn't have a default needs alternative code for |
191 | # "I'm missing" |
192 | # And everything that has pre or post code ends up in a private block |
193 | my ($found, $notfound, $trouble) |
194 | = $self->partition_names($default_type, @items); |
195 | |
6d7fb585 |
196 | my $pthx = $self->C_constant_prefix_param_defintion(); |
197 | my $athx = $self->C_constant_prefix_param(); |
198 | my $symbol_table = C_stringify($package) . '::'; |
199 | |
64bb7586 |
200 | print $c_fh $self->header(), <<"EOADD"; |
9fb41657 |
201 | static void |
202 | ${c_subname}_add_symbol($pthx HV *hash, const char *name, I32 namelen, SV *value) { |
0998eade |
203 | SV **sv = hv_fetch(hash, name, namelen, TRUE); |
204 | if (!sv) { |
fa6eee5a |
205 | Perl_croak($athx "Couldn't add key '%s' to %%$package_sprintf_safe\::", |
206 | name); |
0998eade |
207 | } |
208 | if (SvOK(*sv) || SvTYPE(*sv) == SVt_PVGV) { |
209 | /* Someone has been here before us - have to make a real sub. */ |
210 | newCONSTSUB(hash, name, value); |
211 | } else { |
212 | SvUPGRADE(*sv, SVt_RV); |
213 | SvRV_set(*sv, value); |
214 | SvROK_on(*sv); |
abe8a887 |
215 | SvREADONLY_on(value); |
6d7fb585 |
216 | } |
217 | } |
218 | |
6b43b341 |
219 | EOADD |
220 | |
221 | print $c_fh $explosives ? <<"EXPLODE" : <<"DONT"; |
222 | |
223 | static int |
224 | Im_sorry_Dave(pTHX_ SV *sv, MAGIC *mg) |
225 | { |
226 | PERL_UNUSED_ARG(mg); |
fa6eee5a |
227 | Perl_croak(aTHX_ |
228 | "Your vendor has not defined $package_sprintf_safe macro %"SVf |
229 | " used", sv); |
6b43b341 |
230 | NORETURN_FUNCTION_END; |
231 | } |
232 | |
233 | static MGVTBL not_defined_vtbl = { |
234 | Im_sorry_Dave, /* get - I'm afraid I can't do that */ |
235 | Im_sorry_Dave, /* set */ |
236 | 0, /* len */ |
237 | 0, /* clear */ |
238 | 0, /* free */ |
239 | 0, /* copy */ |
240 | 0, /* dup */ |
241 | }; |
242 | |
243 | EXPLODE |
244 | |
53d44271 |
245 | #ifndef SYMBIAN |
6d7fb585 |
246 | static HV *${c_subname}_missing = NULL; |
53d44271 |
247 | #endif |
6d7fb585 |
248 | |
6b43b341 |
249 | DONT |
6d7fb585 |
250 | |
251 | print $xs_fh <<"EOBOOT"; |
252 | BOOT: |
253 | { |
254 | #ifdef dTHX |
255 | dTHX; |
256 | #endif |
257 | HV *symbol_table = get_hv("$symbol_table", TRUE); |
258 | EOBOOT |
259 | |
260 | my %iterator; |
261 | |
262 | $found->{''} |
263 | = [map {{%$_, type=>'', invert_macro => 1}} @$notfound]; |
264 | |
265 | foreach my $type (sort keys %$found) { |
266 | my $struct = $type_to_struct{$type}; |
64bb7586 |
267 | my $type_to_value = $self->type_to_C_value($type); |
6d7fb585 |
268 | my $number_of_args = $type_num_args{$type}; |
269 | die "Can't find structure definition for type $type" |
270 | unless defined $struct; |
271 | |
272 | my $struct_type = $type ? lc($type) . '_s' : 'notfound_s'; |
273 | print $c_fh "struct $struct_type $struct;\n"; |
274 | |
275 | my $array_name = 'values_for_' . ($type ? lc $type : 'notfound'); |
276 | print $xs_fh <<"EOBOOT"; |
277 | |
278 | static const struct $struct_type $array_name\[] = |
279 | { |
280 | EOBOOT |
281 | |
282 | |
283 | foreach my $item (@{$found->{$type}}) { |
64bb7586 |
284 | my ($name, $namelen, $value, $macro) |
285 | = $self->name_len_value_macro($item); |
6d7fb585 |
286 | |
6d7fb585 |
287 | my $ifdef = $self->macro_to_ifdef($macro); |
288 | if (!$ifdef && $item->{invert_macro}) { |
289 | carp("Attempting to supply a default for '$name' which has no conditional macro"); |
290 | next; |
291 | } |
292 | print $xs_fh $ifdef; |
293 | if ($item->{invert_macro}) { |
294 | print $xs_fh |
295 | " /* This is the default value: */\n" if $type; |
296 | print $xs_fh "#else\n"; |
297 | } |
298 | print $xs_fh " { ", join (', ', "\"$name\"", $namelen, |
299 | &$type_to_value($value)), " },\n", |
300 | $self->macro_to_endif($macro); |
301 | } |
302 | |
303 | |
304 | # Terminate the list with a NULL |
305 | print $xs_fh " { NULL, 0", (", 0" x $number_of_args), " } };\n"; |
306 | |
307 | $iterator{$type} = "value_for_" . ($type ? lc $type : 'notfound'); |
308 | |
309 | print $xs_fh <<"EOBOOT"; |
310 | const struct $struct_type *$iterator{$type} = $array_name; |
311 | |
312 | EOBOOT |
313 | } |
314 | |
315 | delete $found->{''}; |
6b43b341 |
316 | |
317 | my $add_symbol_subname = $c_subname . '_add_symbol'; |
6d7fb585 |
318 | foreach my $type (sort keys %$found) { |
319 | print $xs_fh $self->boottime_iterator($type, $iterator{$type}, |
320 | 'symbol_table', |
6b43b341 |
321 | $add_symbol_subname); |
6d7fb585 |
322 | } |
53d44271 |
323 | print $xs_fh $explosives ? "\n" : <<"EOBOOT"; |
324 | #ifndef SYMBIAN |
6d7fb585 |
325 | ${c_subname}_missing = newHV(); |
53d44271 |
326 | #endif |
6b43b341 |
327 | EOBOOT |
328 | |
329 | print $xs_fh <<"EOBOOT"; |
6d7fb585 |
330 | while (value_for_notfound->name) { |
6b43b341 |
331 | EOBOOT |
332 | |
333 | print $xs_fh $explosives ? <<"EXPLODE" : << "DONT"; |
334 | SV *tripwire = newSV(0); |
335 | |
336 | sv_magicext(tripwire, 0, PERL_MAGIC_ext, ¬_defined_vtbl, 0, 0); |
337 | SvPV_set(tripwire, (char *)value_for_notfound->name); |
338 | if(value_for_notfound->namelen >= 0) { |
339 | SvCUR_set(tripwire, value_for_notfound->namelen); |
340 | } else { |
341 | SvCUR_set(tripwire, -value_for_notfound->namelen); |
342 | SvUTF8_on(tripwire); |
343 | } |
344 | SvPOKp_on(tripwire); |
345 | SvREADONLY_on(tripwire); |
346 | assert(SvLEN(tripwire) == 0); |
347 | |
348 | $add_symbol_subname($athx symbol_table, value_for_notfound->name, |
349 | value_for_notfound->namelen, tripwire); |
350 | EXPLODE |
351 | |
352 | /* Need to add prototypes, else parsing will vary by platform. */ |
353 | SV **sv = hv_fetch(symbol_table, value_for_notfound->name, |
354 | value_for_notfound->namelen, TRUE); |
355 | if (!sv) { |
fa6eee5a |
356 | Perl_croak($athx |
357 | "Couldn't add key '%s' to %%$package_sprintf_safe\::", |
358 | value_for_notfound->name); |
6b43b341 |
359 | } |
360 | if (!SvOK(*sv) && SvTYPE(*sv) != SVt_PVGV) { |
361 | /* Nothing was here before, so mark a prototype of "" */ |
362 | sv_setpvn(*sv, "", 0); |
363 | } else if (SvPOK(*sv) && SvCUR(*sv) == 0) { |
364 | /* There is already a prototype of "" - do nothing */ |
365 | } else { |
366 | /* Someone has been here before us - have to make a real |
367 | typeglob. */ |
368 | /* It turns out to be incredibly hard to deal with all the |
369 | corner cases of sub foo (); and reporting errors correctly, |
370 | so lets cheat a bit. Start with a constant subroutine */ |
371 | CV *cv = newCONSTSUB(symbol_table, value_for_notfound->name, |
372 | &PL_sv_yes); |
373 | /* and then turn it into a non constant declaration only. */ |
aa092aa3 |
374 | SvREFCNT_dec(CvXSUBANY(cv).any_ptr); |
6b43b341 |
375 | CvCONST_off(cv); |
376 | CvXSUB(cv) = NULL; |
aa092aa3 |
377 | CvXSUBANY(cv).any_ptr = NULL; |
6b43b341 |
378 | } |
53d44271 |
379 | #ifndef SYMBIAN |
6d7fb585 |
380 | if (!hv_store(${c_subname}_missing, value_for_notfound->name, |
0998eade |
381 | value_for_notfound->namelen, &PL_sv_yes, 0)) |
64bb7586 |
382 | Perl_croak($athx "Couldn't add key '%s' to missing_hash", |
6d7fb585 |
383 | value_for_notfound->name); |
53d44271 |
384 | #endif |
6b43b341 |
385 | DONT |
386 | |
387 | print $xs_fh <<"EOBOOT"; |
388 | |
6d7fb585 |
389 | ++value_for_notfound; |
390 | } |
6d7fb585 |
391 | EOBOOT |
392 | |
64bb7586 |
393 | foreach my $item (@$trouble) { |
394 | my ($name, $namelen, $value, $macro) |
395 | = $self->name_len_value_macro($item); |
396 | my $ifdef = $self->macro_to_ifdef($macro); |
397 | my $type = $item->{type}; |
398 | my $type_to_value = $self->type_to_C_value($type); |
399 | |
400 | print $xs_fh $ifdef; |
401 | if ($item->{invert_macro}) { |
402 | print $xs_fh |
403 | " /* This is the default value: */\n" if $type; |
404 | print $xs_fh "#else\n"; |
405 | } |
406 | my $generator = $type_to_sv{$type}; |
407 | die "Can't find generator code for type $type" |
408 | unless defined $generator; |
409 | |
6f226cd7 |
410 | print $xs_fh " {\n"; |
6800c0cf |
411 | # We need to use a temporary value because some really troublesome |
412 | # items use C pre processor directives in their values, and in turn |
413 | # these don't fit nicely in the macro-ised generator functions |
6f226cd7 |
414 | my $counter = 0; |
415 | printf $xs_fh " %s temp%d;\n", $_, $counter++ |
416 | foreach @{$type_temporary{$type}}; |
417 | |
418 | print $xs_fh " $item->{pre}\n" if $item->{pre}; |
419 | |
420 | # And because the code in pre might be both declarations and |
421 | # statements, we can't declare and assign to the temporaries in one. |
422 | $counter = 0; |
423 | printf $xs_fh " temp%d = %s;\n", $counter++, $_ |
424 | foreach &$type_to_value($value); |
425 | |
426 | my @tempvarnames = map {sprintf 'temp%d', $_} 0 .. $counter - 1; |
427 | printf $xs_fh <<"EOBOOT", $name, &$generator(@tempvarnames); |
2ebbb0c3 |
428 | ${c_subname}_add_symbol($athx symbol_table, "%s", |
429 | $namelen, %s); |
64bb7586 |
430 | EOBOOT |
2ebbb0c3 |
431 | print $xs_fh " $item->{post}\n" if $item->{post}; |
432 | print $xs_fh " }\n"; |
64bb7586 |
433 | |
434 | print $xs_fh $self->macro_to_endif($macro); |
435 | } |
436 | |
6b43b341 |
437 | print $xs_fh <<EOBOOT; |
e1234d8e |
438 | /* As we've been creating subroutines, we better invalidate any cached |
439 | methods */ |
440 | ++PL_sub_generation; |
64bb7586 |
441 | } |
6b43b341 |
442 | EOBOOT |
443 | |
444 | print $xs_fh $explosives ? <<"EXPLODE" : <<"DONT"; |
445 | |
446 | void |
447 | $xs_subname(sv) |
448 | INPUT: |
449 | SV * sv; |
450 | PPCODE: |
fa6eee5a |
451 | sv = newSVpvf("Your vendor has not defined $package_sprintf_safe macro %" SVf |
6b43b341 |
452 | ", used", sv); |
453 | PUSHs(sv_2mortal(sv)); |
454 | EXPLODE |
6d7fb585 |
455 | |
456 | void |
457 | $xs_subname(sv) |
458 | PREINIT: |
459 | STRLEN len; |
460 | INPUT: |
461 | SV * sv; |
462 | const char * s = SvPV(sv, len); |
463 | PPCODE: |
53d44271 |
464 | #ifdef SYMBIAN |
465 | sv = newSVpvf("%"SVf" is not a valid $package_sprintf_safe macro", sv); |
466 | #else |
bb7a0f54 |
467 | if (hv_exists(${c_subname}_missing, s, SvUTF8(sv) ? -(I32)len : (I32)len)) { |
fa6eee5a |
468 | sv = newSVpvf("Your vendor has not defined $package_sprintf_safe macro %" SVf |
6d7fb585 |
469 | ", used", sv); |
470 | } else { |
fa6eee5a |
471 | sv = newSVpvf("%"SVf" is not a valid $package_sprintf_safe macro", |
472 | sv); |
6d7fb585 |
473 | } |
53d44271 |
474 | #endif |
475 | PUSHs(sv_2mortal(sv)); |
6b43b341 |
476 | DONT |
477 | |
6d7fb585 |
478 | } |
479 | |
480 | 1; |