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d6376244 |
1 | /* xsutils.c |
2 | * |
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3 | * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
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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 | |
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25 | /* package attributes; */ |
acfe0abc |
26 | void XS_attributes__warn_reserved(pTHX_ CV *cv); |
27 | void XS_attributes_reftype(pTHX_ CV *cv); |
28 | void XS_attributes__modify_attrs(pTHX_ CV *cv); |
29 | void XS_attributes__guess_stash(pTHX_ CV *cv); |
30 | void XS_attributes__fetch_attrs(pTHX_ CV *cv); |
31 | void XS_attributes_bootstrap(pTHX_ CV *cv); |
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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 |
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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 | { |
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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 | { |
59 | SV *attr; |
60 | char *name; |
61 | STRLEN len; |
62 | bool negated; |
63 | int nret; |
64 | |
65 | for (nret = 0 ; numattrs && (attr = *attrlist++); numattrs--) { |
66 | name = SvPV(attr, len); |
155aba94 |
67 | if ((negated = (*name == '-'))) { |
09bef843 |
68 | name++; |
69 | len--; |
70 | } |
71 | switch (SvTYPE(sv)) { |
72 | case SVt_PVCV: |
73 | switch ((int)len) { |
77c9267e |
74 | #ifdef CVf_ASSERTION |
42262798 |
75 | case 9: |
8cad210e |
76 | if (memEQ(name, "assertion", 9)) { |
42262798 |
77 | if (negated) |
78 | CvFLAGS((CV*)sv) &= ~CVf_ASSERTION; |
79 | else |
80 | CvFLAGS((CV*)sv) |= CVf_ASSERTION; |
81 | continue; |
82 | } |
83 | break; |
77c9267e |
84 | #endif |
09bef843 |
85 | case 6: |
8cad210e |
86 | switch (name[3]) { |
09bef843 |
87 | case 'l': |
88 | #ifdef CVf_LVALUE |
8cad210e |
89 | if (memEQ(name, "lvalue", 6)) { |
09bef843 |
90 | if (negated) |
91 | CvFLAGS((CV*)sv) &= ~CVf_LVALUE; |
92 | else |
93 | CvFLAGS((CV*)sv) |= CVf_LVALUE; |
94 | continue; |
95 | } |
8cad210e |
96 | break; |
97 | case 'k': |
09bef843 |
98 | #endif /* defined CVf_LVALUE */ |
8cad210e |
99 | if (memEQ(name, "locked", 6)) { |
09bef843 |
100 | if (negated) |
101 | CvFLAGS((CV*)sv) &= ~CVf_LOCKED; |
102 | else |
103 | CvFLAGS((CV*)sv) |= CVf_LOCKED; |
104 | continue; |
105 | } |
106 | break; |
8cad210e |
107 | case 'h': |
108 | if (memEQ(name, "method", 6)) { |
09bef843 |
109 | if (negated) |
110 | CvFLAGS((CV*)sv) &= ~CVf_METHOD; |
111 | else |
112 | CvFLAGS((CV*)sv) |= CVf_METHOD; |
113 | continue; |
114 | } |
115 | break; |
116 | } |
117 | break; |
118 | } |
119 | break; |
120 | default: |
0256094b |
121 | switch ((int)len) { |
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122 | case 6: |
8cad210e |
123 | switch (name[5]) { |
124 | case 'd': |
125 | if (memEQ(name, "share", 5)) { |
13c1b207 |
126 | if (negated) |
127 | Perl_croak(aTHX_ "A variable may not be unshared"); |
128 | SvSHARE(sv); |
129 | continue; |
130 | } |
131 | break; |
8cad210e |
132 | case 'e': |
133 | if (memEQ(name, "uniqu", 5)) { |
95f0a2f1 |
134 | if (SvTYPE(sv) == SVt_PVGV) { |
135 | if (negated) |
136 | GvUNIQUE_off(sv); |
137 | else |
138 | GvUNIQUE_on(sv); |
139 | } |
140 | /* Hope this came from toke.c if not a GV. */ |
0256094b |
141 | continue; |
142 | } |
143 | } |
144 | } |
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145 | break; |
146 | } |
147 | /* anything recognized had a 'continue' above */ |
148 | *retlist++ = attr; |
149 | nret++; |
150 | } |
151 | |
152 | return nret; |
153 | } |
154 | |
155 | |
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156 | |
157 | /* package attributes; */ |
158 | |
159 | XS(XS_attributes_bootstrap) |
160 | { |
161 | dXSARGS; |
e1ec3a88 |
162 | const char file[] = __FILE__; |
6867be6d |
163 | (void)cv; |
09bef843 |
164 | |
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165 | if( items > 1 ) |
166 | Perl_croak(aTHX_ "Usage: attributes::bootstrap $module"); |
b7953727 |
167 | |
09bef843 |
168 | newXSproto("attributes::_warn_reserved", XS_attributes__warn_reserved, file, ""); |
169 | newXS("attributes::_modify_attrs", XS_attributes__modify_attrs, file); |
170 | newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, file, "$"); |
171 | newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, file, "$"); |
172 | newXSproto("attributes::reftype", XS_attributes_reftype, file, "$"); |
173 | |
174 | XSRETURN(0); |
175 | } |
176 | |
177 | XS(XS_attributes__modify_attrs) |
178 | { |
179 | dXSARGS; |
180 | SV *rv, *sv; |
6867be6d |
181 | (void)cv; |
09bef843 |
182 | |
183 | if (items < 1) { |
184 | usage: |
185 | Perl_croak(aTHX_ |
186 | "Usage: attributes::_modify_attrs $reference, @attributes"); |
187 | } |
188 | |
189 | rv = ST(0); |
190 | if (!(SvOK(rv) && SvROK(rv))) |
191 | goto usage; |
192 | sv = SvRV(rv); |
193 | if (items > 1) |
acfe0abc |
194 | XSRETURN(modify_SV_attributes(aTHX_ sv, &ST(0), &ST(1), items-1)); |
09bef843 |
195 | |
196 | XSRETURN(0); |
197 | } |
198 | |
199 | XS(XS_attributes__fetch_attrs) |
200 | { |
201 | dXSARGS; |
202 | SV *rv, *sv; |
203 | cv_flags_t cvflags; |
6867be6d |
204 | (void)cv; |
09bef843 |
205 | |
206 | if (items != 1) { |
207 | usage: |
208 | Perl_croak(aTHX_ |
209 | "Usage: attributes::_fetch_attrs $reference"); |
210 | } |
211 | |
212 | rv = ST(0); |
213 | SP -= items; |
214 | if (!(SvOK(rv) && SvROK(rv))) |
215 | goto usage; |
216 | sv = SvRV(rv); |
217 | |
218 | switch (SvTYPE(sv)) { |
219 | case SVt_PVCV: |
220 | cvflags = CvFLAGS((CV*)sv); |
221 | if (cvflags & CVf_LOCKED) |
222 | XPUSHs(sv_2mortal(newSVpvn("locked", 6))); |
223 | #ifdef CVf_LVALUE |
224 | if (cvflags & CVf_LVALUE) |
225 | XPUSHs(sv_2mortal(newSVpvn("lvalue", 6))); |
226 | #endif |
227 | if (cvflags & CVf_METHOD) |
228 | XPUSHs(sv_2mortal(newSVpvn("method", 6))); |
7fb37951 |
229 | if (GvUNIQUE(CvGV((CV*)sv))) |
95f0a2f1 |
230 | XPUSHs(sv_2mortal(newSVpvn("unique", 6))); |
06492da6 |
231 | if (cvflags & CVf_ASSERTION) |
232 | XPUSHs(sv_2mortal(newSVpvn("assertion", 9))); |
95f0a2f1 |
233 | break; |
234 | case SVt_PVGV: |
235 | if (GvUNIQUE(sv)) |
236 | XPUSHs(sv_2mortal(newSVpvn("unique", 6))); |
09bef843 |
237 | break; |
238 | default: |
239 | break; |
240 | } |
241 | |
242 | PUTBACK; |
243 | } |
244 | |
245 | XS(XS_attributes__guess_stash) |
246 | { |
247 | dXSARGS; |
248 | SV *rv, *sv; |
d277572a |
249 | dXSTARG; |
6867be6d |
250 | (void)cv; |
09bef843 |
251 | |
252 | if (items != 1) { |
253 | usage: |
254 | Perl_croak(aTHX_ |
255 | "Usage: attributes::_guess_stash $reference"); |
256 | } |
257 | |
258 | rv = ST(0); |
259 | ST(0) = TARG; |
260 | if (!(SvOK(rv) && SvROK(rv))) |
261 | goto usage; |
262 | sv = SvRV(rv); |
263 | |
264 | if (SvOBJECT(sv)) |
265 | sv_setpv(TARG, HvNAME(SvSTASH(sv))); |
266 | #if 0 /* this was probably a bad idea */ |
267 | else if (SvPADMY(sv)) |
268 | sv_setsv(TARG, &PL_sv_no); /* unblessed lexical */ |
269 | #endif |
270 | else { |
6867be6d |
271 | const HV *stash = Nullhv; |
09bef843 |
272 | switch (SvTYPE(sv)) { |
273 | case SVt_PVCV: |
6676db26 |
274 | if (CvGV(sv) && isGV(CvGV(sv)) && GvSTASH(CvGV(sv))) |
09bef843 |
275 | stash = GvSTASH(CvGV(sv)); |
6676db26 |
276 | else if (/* !CvANON(sv) && */ CvSTASH(sv)) |
09bef843 |
277 | stash = CvSTASH(sv); |
278 | break; |
279 | case SVt_PVMG: |
14befaf4 |
280 | if (!(SvFAKE(sv) && SvTIED_mg(sv, PERL_MAGIC_glob))) |
09bef843 |
281 | break; |
282 | /*FALLTHROUGH*/ |
283 | case SVt_PVGV: |
6676db26 |
284 | if (GvGP(sv) && GvESTASH((GV*)sv)) |
09bef843 |
285 | stash = GvESTASH((GV*)sv); |
286 | break; |
287 | default: |
288 | break; |
289 | } |
290 | if (stash) |
291 | sv_setpv(TARG, HvNAME(stash)); |
292 | } |
293 | |
09bef843 |
294 | SvSETMAGIC(TARG); |
09bef843 |
295 | XSRETURN(1); |
296 | } |
297 | |
298 | XS(XS_attributes_reftype) |
299 | { |
300 | dXSARGS; |
301 | SV *rv, *sv; |
d277572a |
302 | dXSTARG; |
6867be6d |
303 | (void)cv; |
09bef843 |
304 | |
305 | if (items != 1) { |
306 | usage: |
307 | Perl_croak(aTHX_ |
308 | "Usage: attributes::reftype $reference"); |
309 | } |
310 | |
311 | rv = ST(0); |
312 | ST(0) = TARG; |
4694d0ea |
313 | if (SvGMAGICAL(rv)) |
314 | mg_get(rv); |
121e869f |
315 | if (!(SvOK(rv) && SvROK(rv))) |
09bef843 |
316 | goto usage; |
317 | sv = SvRV(rv); |
318 | sv_setpv(TARG, sv_reftype(sv, 0)); |
09bef843 |
319 | SvSETMAGIC(TARG); |
09bef843 |
320 | |
321 | XSRETURN(1); |
322 | } |
323 | |
324 | XS(XS_attributes__warn_reserved) |
325 | { |
326 | dXSARGS; |
6867be6d |
327 | (void)cv; |
09bef843 |
328 | |
329 | if (items != 0) { |
330 | Perl_croak(aTHX_ |
331 | "Usage: attributes::_warn_reserved ()"); |
332 | } |
333 | |
334 | EXTEND(SP,1); |
0006dff7 |
335 | ST(0) = boolSV(ckWARN(WARN_RESERVED)); |
09bef843 |
336 | |
337 | XSRETURN(1); |
338 | } |
339 | |