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d6376244 |
1 | /* xsutils.c |
2 | * |
acde74e1 |
3 | * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, |
371fce9b |
4 | * by Larry Wall and others |
d6376244 |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public |
7 | * License or the Artistic License, as specified in the README file. |
8 | * |
9 | */ |
10 | |
d31a8517 |
11 | /* |
12 | * "Perilous to us all are the devices of an art deeper than we possess |
13 | * ourselves." --Gandalf |
14 | */ |
15 | |
16 | |
09bef843 |
17 | #include "EXTERN.h" |
18 | #define PERL_IN_XSUTILS_C |
19 | #include "perl.h" |
20 | |
21 | /* |
22 | * Contributed by Spider Boardman (spider.boardman@orb.nashua.nh.us). |
23 | */ |
24 | |
349fd7b7 |
25 | /* package attributes; */ |
27da23d5 |
26 | PERL_XS_EXPORT_C void XS_attributes__warn_reserved(pTHX_ CV *cv); |
27 | PERL_XS_EXPORT_C void XS_attributes_reftype(pTHX_ CV *cv); |
28 | PERL_XS_EXPORT_C void XS_attributes__modify_attrs(pTHX_ CV *cv); |
29 | PERL_XS_EXPORT_C void XS_attributes__guess_stash(pTHX_ CV *cv); |
30 | PERL_XS_EXPORT_C void XS_attributes__fetch_attrs(pTHX_ CV *cv); |
31 | PERL_XS_EXPORT_C void XS_attributes_bootstrap(pTHX_ CV *cv); |
349fd7b7 |
32 | |
33 | |
34 | /* |
35 | * Note that only ${pkg}::bootstrap definitions should go here. |
36 | * This helps keep down the start-up time, which is especially |
37 | * relevant for users who don't invoke any features which are |
38 | * (partially) implemented here. |
39 | * |
40 | * The various bootstrap definitions can take care of doing |
41 | * package-specific newXS() calls. Since the layout of the |
6a34af38 |
42 | * bundled *.pm files is in a version-specific directory, |
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43 | * version checks in these bootstrap calls are optional. |
44 | */ |
45 | |
46 | void |
47 | Perl_boot_core_xsutils(pTHX) |
48 | { |
e1ec3a88 |
49 | const char file[] = __FILE__; |
349fd7b7 |
50 | |
51 | newXS("attributes::bootstrap", XS_attributes_bootstrap, file); |
52 | } |
53 | |
349fd7b7 |
54 | #include "XSUB.h" |
55 | |
56 | static int |
acfe0abc |
57 | modify_SV_attributes(pTHX_ SV *sv, SV **retlist, SV **attrlist, int numattrs) |
09bef843 |
58 | { |
97aff369 |
59 | dVAR; |
09bef843 |
60 | SV *attr; |
09bef843 |
61 | int nret; |
62 | |
63 | for (nret = 0 ; numattrs && (attr = *attrlist++); numattrs--) { |
4373e329 |
64 | STRLEN len; |
cfd0369c |
65 | const char *name = SvPV_const(attr, len); |
4373e329 |
66 | const bool negated = (*name == '-'); |
67 | |
68 | if (negated) { |
09bef843 |
69 | name++; |
70 | len--; |
71 | } |
72 | switch (SvTYPE(sv)) { |
73 | case SVt_PVCV: |
74 | switch ((int)len) { |
77c9267e |
75 | #ifdef CVf_ASSERTION |
42262798 |
76 | case 9: |
8cad210e |
77 | if (memEQ(name, "assertion", 9)) { |
42262798 |
78 | if (negated) |
79 | CvFLAGS((CV*)sv) &= ~CVf_ASSERTION; |
80 | else |
81 | CvFLAGS((CV*)sv) |= CVf_ASSERTION; |
82 | continue; |
83 | } |
84 | break; |
77c9267e |
85 | #endif |
09bef843 |
86 | case 6: |
8cad210e |
87 | switch (name[3]) { |
09bef843 |
88 | case 'l': |
89 | #ifdef CVf_LVALUE |
8cad210e |
90 | if (memEQ(name, "lvalue", 6)) { |
09bef843 |
91 | if (negated) |
92 | CvFLAGS((CV*)sv) &= ~CVf_LVALUE; |
93 | else |
94 | CvFLAGS((CV*)sv) |= CVf_LVALUE; |
95 | continue; |
96 | } |
8cad210e |
97 | break; |
98 | case 'k': |
09bef843 |
99 | #endif /* defined CVf_LVALUE */ |
8cad210e |
100 | if (memEQ(name, "locked", 6)) { |
09bef843 |
101 | if (negated) |
102 | CvFLAGS((CV*)sv) &= ~CVf_LOCKED; |
103 | else |
104 | CvFLAGS((CV*)sv) |= CVf_LOCKED; |
105 | continue; |
106 | } |
107 | break; |
8cad210e |
108 | case 'h': |
109 | if (memEQ(name, "method", 6)) { |
09bef843 |
110 | if (negated) |
111 | CvFLAGS((CV*)sv) &= ~CVf_METHOD; |
112 | else |
113 | CvFLAGS((CV*)sv) |= CVf_METHOD; |
114 | continue; |
115 | } |
116 | break; |
117 | } |
118 | break; |
119 | } |
120 | break; |
121 | default: |
0256094b |
122 | switch ((int)len) { |
95f0a2f1 |
123 | case 6: |
8cad210e |
124 | switch (name[5]) { |
125 | case 'd': |
126 | if (memEQ(name, "share", 5)) { |
13c1b207 |
127 | if (negated) |
128 | Perl_croak(aTHX_ "A variable may not be unshared"); |
129 | SvSHARE(sv); |
130 | continue; |
131 | } |
132 | break; |
8cad210e |
133 | case 'e': |
134 | if (memEQ(name, "uniqu", 5)) { |
95f0a2f1 |
135 | if (SvTYPE(sv) == SVt_PVGV) { |
44f8325f |
136 | if (negated) { |
95f0a2f1 |
137 | GvUNIQUE_off(sv); |
44f8325f |
138 | } else { |
95f0a2f1 |
139 | GvUNIQUE_on(sv); |
44f8325f |
140 | } |
95f0a2f1 |
141 | } |
142 | /* Hope this came from toke.c if not a GV. */ |
0256094b |
143 | continue; |
144 | } |
145 | } |
146 | } |
09bef843 |
147 | break; |
148 | } |
149 | /* anything recognized had a 'continue' above */ |
150 | *retlist++ = attr; |
151 | nret++; |
152 | } |
153 | |
154 | return nret; |
155 | } |
156 | |
157 | |
09bef843 |
158 | |
159 | /* package attributes; */ |
160 | |
161 | XS(XS_attributes_bootstrap) |
162 | { |
97aff369 |
163 | dVAR; |
09bef843 |
164 | dXSARGS; |
e1ec3a88 |
165 | const char file[] = __FILE__; |
09bef843 |
166 | |
592f5969 |
167 | if( items > 1 ) |
168 | Perl_croak(aTHX_ "Usage: attributes::bootstrap $module"); |
b7953727 |
169 | |
09bef843 |
170 | newXSproto("attributes::_warn_reserved", XS_attributes__warn_reserved, file, ""); |
171 | newXS("attributes::_modify_attrs", XS_attributes__modify_attrs, file); |
172 | newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, file, "$"); |
173 | newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, file, "$"); |
174 | newXSproto("attributes::reftype", XS_attributes_reftype, file, "$"); |
175 | |
176 | XSRETURN(0); |
177 | } |
178 | |
179 | XS(XS_attributes__modify_attrs) |
180 | { |
97aff369 |
181 | dVAR; |
09bef843 |
182 | dXSARGS; |
183 | SV *rv, *sv; |
184 | |
185 | if (items < 1) { |
186 | usage: |
187 | Perl_croak(aTHX_ |
188 | "Usage: attributes::_modify_attrs $reference, @attributes"); |
189 | } |
190 | |
191 | rv = ST(0); |
192 | if (!(SvOK(rv) && SvROK(rv))) |
193 | goto usage; |
194 | sv = SvRV(rv); |
195 | if (items > 1) |
acfe0abc |
196 | XSRETURN(modify_SV_attributes(aTHX_ sv, &ST(0), &ST(1), items-1)); |
09bef843 |
197 | |
198 | XSRETURN(0); |
199 | } |
200 | |
201 | XS(XS_attributes__fetch_attrs) |
202 | { |
97aff369 |
203 | dVAR; |
09bef843 |
204 | dXSARGS; |
205 | SV *rv, *sv; |
206 | cv_flags_t cvflags; |
207 | |
208 | if (items != 1) { |
209 | usage: |
210 | Perl_croak(aTHX_ |
211 | "Usage: attributes::_fetch_attrs $reference"); |
212 | } |
213 | |
214 | rv = ST(0); |
215 | SP -= items; |
216 | if (!(SvOK(rv) && SvROK(rv))) |
217 | goto usage; |
218 | sv = SvRV(rv); |
219 | |
220 | switch (SvTYPE(sv)) { |
221 | case SVt_PVCV: |
222 | cvflags = CvFLAGS((CV*)sv); |
223 | if (cvflags & CVf_LOCKED) |
396482e1 |
224 | XPUSHs(sv_2mortal(newSVpvs("locked"))); |
09bef843 |
225 | #ifdef CVf_LVALUE |
226 | if (cvflags & CVf_LVALUE) |
396482e1 |
227 | XPUSHs(sv_2mortal(newSVpvs("lvalue"))); |
09bef843 |
228 | #endif |
229 | if (cvflags & CVf_METHOD) |
396482e1 |
230 | XPUSHs(sv_2mortal(newSVpvs("method"))); |
7fb37951 |
231 | if (GvUNIQUE(CvGV((CV*)sv))) |
396482e1 |
232 | XPUSHs(sv_2mortal(newSVpvs("unique"))); |
06492da6 |
233 | if (cvflags & CVf_ASSERTION) |
396482e1 |
234 | XPUSHs(sv_2mortal(newSVpvs("assertion"))); |
95f0a2f1 |
235 | break; |
236 | case SVt_PVGV: |
237 | if (GvUNIQUE(sv)) |
396482e1 |
238 | XPUSHs(sv_2mortal(newSVpvs("unique"))); |
09bef843 |
239 | break; |
240 | default: |
241 | break; |
242 | } |
243 | |
244 | PUTBACK; |
245 | } |
246 | |
247 | XS(XS_attributes__guess_stash) |
248 | { |
97aff369 |
249 | dVAR; |
09bef843 |
250 | dXSARGS; |
251 | SV *rv, *sv; |
d277572a |
252 | dXSTARG; |
09bef843 |
253 | |
254 | if (items != 1) { |
255 | usage: |
256 | Perl_croak(aTHX_ |
257 | "Usage: attributes::_guess_stash $reference"); |
258 | } |
259 | |
260 | rv = ST(0); |
261 | ST(0) = TARG; |
262 | if (!(SvOK(rv) && SvROK(rv))) |
263 | goto usage; |
264 | sv = SvRV(rv); |
265 | |
266 | if (SvOBJECT(sv)) |
7423f6db |
267 | sv_setpvn(TARG, HvNAME_get(SvSTASH(sv)), HvNAMELEN_get(SvSTASH(sv))); |
09bef843 |
268 | #if 0 /* this was probably a bad idea */ |
269 | else if (SvPADMY(sv)) |
270 | sv_setsv(TARG, &PL_sv_no); /* unblessed lexical */ |
271 | #endif |
272 | else { |
5c284bb0 |
273 | const HV *stash = NULL; |
09bef843 |
274 | switch (SvTYPE(sv)) { |
275 | case SVt_PVCV: |
6676db26 |
276 | if (CvGV(sv) && isGV(CvGV(sv)) && GvSTASH(CvGV(sv))) |
09bef843 |
277 | stash = GvSTASH(CvGV(sv)); |
6676db26 |
278 | else if (/* !CvANON(sv) && */ CvSTASH(sv)) |
09bef843 |
279 | stash = CvSTASH(sv); |
280 | break; |
09bef843 |
281 | case SVt_PVGV: |
6676db26 |
282 | if (GvGP(sv) && GvESTASH((GV*)sv)) |
09bef843 |
283 | stash = GvESTASH((GV*)sv); |
284 | break; |
285 | default: |
286 | break; |
287 | } |
288 | if (stash) |
7423f6db |
289 | sv_setpvn(TARG, HvNAME_get(stash), HvNAMELEN_get(stash)); |
09bef843 |
290 | } |
291 | |
09bef843 |
292 | SvSETMAGIC(TARG); |
09bef843 |
293 | XSRETURN(1); |
294 | } |
295 | |
296 | XS(XS_attributes_reftype) |
297 | { |
97aff369 |
298 | dVAR; |
09bef843 |
299 | dXSARGS; |
300 | SV *rv, *sv; |
d277572a |
301 | dXSTARG; |
09bef843 |
302 | |
303 | if (items != 1) { |
304 | usage: |
305 | Perl_croak(aTHX_ |
306 | "Usage: attributes::reftype $reference"); |
307 | } |
308 | |
309 | rv = ST(0); |
310 | ST(0) = TARG; |
5b295bef |
311 | SvGETMAGIC(rv); |
121e869f |
312 | if (!(SvOK(rv) && SvROK(rv))) |
09bef843 |
313 | goto usage; |
314 | sv = SvRV(rv); |
315 | sv_setpv(TARG, sv_reftype(sv, 0)); |
09bef843 |
316 | SvSETMAGIC(TARG); |
09bef843 |
317 | |
318 | XSRETURN(1); |
319 | } |
320 | |
321 | XS(XS_attributes__warn_reserved) |
322 | { |
97aff369 |
323 | dVAR; |
09bef843 |
324 | dXSARGS; |
09bef843 |
325 | |
326 | if (items != 0) { |
327 | Perl_croak(aTHX_ |
328 | "Usage: attributes::_warn_reserved ()"); |
329 | } |
330 | |
331 | EXTEND(SP,1); |
0006dff7 |
332 | ST(0) = boolSV(ckWARN(WARN_RESERVED)); |
09bef843 |
333 | |
334 | XSRETURN(1); |
335 | } |
336 | |
66610fdd |
337 | /* |
338 | * Local variables: |
339 | * c-indentation-style: bsd |
340 | * c-basic-offset: 4 |
341 | * indent-tabs-mode: t |
342 | * End: |
343 | * |
37442d52 |
344 | * ex: set ts=8 sts=4 sw=4 noet: |
345 | */ |