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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 |
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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 | |
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11 | /* |
12 | * "Perilous to us all are the devices of an art deeper than we possess |
13 | * ourselves." --Gandalf |
14 | */ |
15 | |
16 | |
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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; */ |
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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 | { |
49 | char *file = __FILE__; |
50 | |
51 | newXS("attributes::bootstrap", XS_attributes_bootstrap, file); |
52 | } |
53 | |
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54 | #include "XSUB.h" |
55 | |
56 | static int |
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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 == '-'))) { |
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68 | name++; |
69 | len--; |
70 | } |
71 | switch (SvTYPE(sv)) { |
72 | case SVt_PVCV: |
73 | switch ((int)len) { |
42262798 |
74 | case 9: |
8cad210e |
75 | if (memEQ(name, "assertion", 9)) { |
42262798 |
76 | if (negated) |
77 | CvFLAGS((CV*)sv) &= ~CVf_ASSERTION; |
78 | else |
79 | CvFLAGS((CV*)sv) |= CVf_ASSERTION; |
80 | continue; |
81 | } |
82 | break; |
09bef843 |
83 | case 6: |
8cad210e |
84 | switch (name[3]) { |
09bef843 |
85 | case 'l': |
86 | #ifdef CVf_LVALUE |
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87 | if (memEQ(name, "lvalue", 6)) { |
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88 | if (negated) |
89 | CvFLAGS((CV*)sv) &= ~CVf_LVALUE; |
90 | else |
91 | CvFLAGS((CV*)sv) |= CVf_LVALUE; |
92 | continue; |
93 | } |
8cad210e |
94 | break; |
95 | case 'k': |
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96 | #endif /* defined CVf_LVALUE */ |
8cad210e |
97 | if (memEQ(name, "locked", 6)) { |
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98 | if (negated) |
99 | CvFLAGS((CV*)sv) &= ~CVf_LOCKED; |
100 | else |
101 | CvFLAGS((CV*)sv) |= CVf_LOCKED; |
102 | continue; |
103 | } |
104 | break; |
8cad210e |
105 | case 'h': |
106 | if (memEQ(name, "method", 6)) { |
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107 | if (negated) |
108 | CvFLAGS((CV*)sv) &= ~CVf_METHOD; |
109 | else |
110 | CvFLAGS((CV*)sv) |= CVf_METHOD; |
111 | continue; |
112 | } |
113 | break; |
114 | } |
115 | break; |
116 | } |
117 | break; |
118 | default: |
0256094b |
119 | switch ((int)len) { |
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120 | case 6: |
8cad210e |
121 | switch (name[5]) { |
122 | case 'd': |
123 | if (memEQ(name, "share", 5)) { |
13c1b207 |
124 | if (negated) |
125 | Perl_croak(aTHX_ "A variable may not be unshared"); |
126 | SvSHARE(sv); |
127 | continue; |
128 | } |
129 | break; |
8cad210e |
130 | case 'e': |
131 | if (memEQ(name, "uniqu", 5)) { |
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132 | if (SvTYPE(sv) == SVt_PVGV) { |
133 | if (negated) |
134 | GvUNIQUE_off(sv); |
135 | else |
136 | GvUNIQUE_on(sv); |
137 | } |
138 | /* Hope this came from toke.c if not a GV. */ |
0256094b |
139 | continue; |
140 | } |
141 | } |
142 | } |
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143 | break; |
144 | } |
145 | /* anything recognized had a 'continue' above */ |
146 | *retlist++ = attr; |
147 | nret++; |
148 | } |
149 | |
150 | return nret; |
151 | } |
152 | |
153 | |
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154 | |
155 | /* package attributes; */ |
156 | |
157 | XS(XS_attributes_bootstrap) |
158 | { |
159 | dXSARGS; |
160 | char *file = __FILE__; |
161 | |
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162 | if( items > 1 ) |
163 | Perl_croak(aTHX_ "Usage: attributes::bootstrap $module"); |
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164 | |
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165 | newXSproto("attributes::_warn_reserved", XS_attributes__warn_reserved, file, ""); |
166 | newXS("attributes::_modify_attrs", XS_attributes__modify_attrs, file); |
167 | newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, file, "$"); |
168 | newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, file, "$"); |
169 | newXSproto("attributes::reftype", XS_attributes_reftype, file, "$"); |
170 | |
171 | XSRETURN(0); |
172 | } |
173 | |
174 | XS(XS_attributes__modify_attrs) |
175 | { |
176 | dXSARGS; |
177 | SV *rv, *sv; |
178 | |
179 | if (items < 1) { |
180 | usage: |
181 | Perl_croak(aTHX_ |
182 | "Usage: attributes::_modify_attrs $reference, @attributes"); |
183 | } |
184 | |
185 | rv = ST(0); |
186 | if (!(SvOK(rv) && SvROK(rv))) |
187 | goto usage; |
188 | sv = SvRV(rv); |
189 | if (items > 1) |
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190 | XSRETURN(modify_SV_attributes(aTHX_ sv, &ST(0), &ST(1), items-1)); |
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191 | |
192 | XSRETURN(0); |
193 | } |
194 | |
195 | XS(XS_attributes__fetch_attrs) |
196 | { |
197 | dXSARGS; |
198 | SV *rv, *sv; |
199 | cv_flags_t cvflags; |
200 | |
201 | if (items != 1) { |
202 | usage: |
203 | Perl_croak(aTHX_ |
204 | "Usage: attributes::_fetch_attrs $reference"); |
205 | } |
206 | |
207 | rv = ST(0); |
208 | SP -= items; |
209 | if (!(SvOK(rv) && SvROK(rv))) |
210 | goto usage; |
211 | sv = SvRV(rv); |
212 | |
213 | switch (SvTYPE(sv)) { |
214 | case SVt_PVCV: |
215 | cvflags = CvFLAGS((CV*)sv); |
216 | if (cvflags & CVf_LOCKED) |
217 | XPUSHs(sv_2mortal(newSVpvn("locked", 6))); |
218 | #ifdef CVf_LVALUE |
219 | if (cvflags & CVf_LVALUE) |
220 | XPUSHs(sv_2mortal(newSVpvn("lvalue", 6))); |
221 | #endif |
222 | if (cvflags & CVf_METHOD) |
223 | XPUSHs(sv_2mortal(newSVpvn("method", 6))); |
7fb37951 |
224 | if (GvUNIQUE(CvGV((CV*)sv))) |
95f0a2f1 |
225 | XPUSHs(sv_2mortal(newSVpvn("unique", 6))); |
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226 | if (cvflags & CVf_ASSERTION) |
227 | XPUSHs(sv_2mortal(newSVpvn("assertion", 9))); |
95f0a2f1 |
228 | break; |
229 | case SVt_PVGV: |
230 | if (GvUNIQUE(sv)) |
231 | XPUSHs(sv_2mortal(newSVpvn("unique", 6))); |
09bef843 |
232 | break; |
233 | default: |
234 | break; |
235 | } |
236 | |
237 | PUTBACK; |
238 | } |
239 | |
240 | XS(XS_attributes__guess_stash) |
241 | { |
242 | dXSARGS; |
243 | SV *rv, *sv; |
d277572a |
244 | dXSTARG; |
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245 | |
246 | if (items != 1) { |
247 | usage: |
248 | Perl_croak(aTHX_ |
249 | "Usage: attributes::_guess_stash $reference"); |
250 | } |
251 | |
252 | rv = ST(0); |
253 | ST(0) = TARG; |
254 | if (!(SvOK(rv) && SvROK(rv))) |
255 | goto usage; |
256 | sv = SvRV(rv); |
257 | |
258 | if (SvOBJECT(sv)) |
259 | sv_setpv(TARG, HvNAME(SvSTASH(sv))); |
260 | #if 0 /* this was probably a bad idea */ |
261 | else if (SvPADMY(sv)) |
262 | sv_setsv(TARG, &PL_sv_no); /* unblessed lexical */ |
263 | #endif |
264 | else { |
265 | HV *stash = Nullhv; |
266 | switch (SvTYPE(sv)) { |
267 | case SVt_PVCV: |
6676db26 |
268 | if (CvGV(sv) && isGV(CvGV(sv)) && GvSTASH(CvGV(sv))) |
09bef843 |
269 | stash = GvSTASH(CvGV(sv)); |
6676db26 |
270 | else if (/* !CvANON(sv) && */ CvSTASH(sv)) |
09bef843 |
271 | stash = CvSTASH(sv); |
272 | break; |
273 | case SVt_PVMG: |
14befaf4 |
274 | if (!(SvFAKE(sv) && SvTIED_mg(sv, PERL_MAGIC_glob))) |
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275 | break; |
276 | /*FALLTHROUGH*/ |
277 | case SVt_PVGV: |
6676db26 |
278 | if (GvGP(sv) && GvESTASH((GV*)sv)) |
09bef843 |
279 | stash = GvESTASH((GV*)sv); |
280 | break; |
281 | default: |
282 | break; |
283 | } |
284 | if (stash) |
285 | sv_setpv(TARG, HvNAME(stash)); |
286 | } |
287 | |
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288 | SvSETMAGIC(TARG); |
09bef843 |
289 | XSRETURN(1); |
290 | } |
291 | |
292 | XS(XS_attributes_reftype) |
293 | { |
294 | dXSARGS; |
295 | SV *rv, *sv; |
d277572a |
296 | dXSTARG; |
09bef843 |
297 | |
298 | if (items != 1) { |
299 | usage: |
300 | Perl_croak(aTHX_ |
301 | "Usage: attributes::reftype $reference"); |
302 | } |
303 | |
304 | rv = ST(0); |
305 | ST(0) = TARG; |
4694d0ea |
306 | if (SvGMAGICAL(rv)) |
307 | mg_get(rv); |
121e869f |
308 | if (!(SvOK(rv) && SvROK(rv))) |
09bef843 |
309 | goto usage; |
310 | sv = SvRV(rv); |
311 | sv_setpv(TARG, sv_reftype(sv, 0)); |
09bef843 |
312 | SvSETMAGIC(TARG); |
09bef843 |
313 | |
314 | XSRETURN(1); |
315 | } |
316 | |
317 | XS(XS_attributes__warn_reserved) |
318 | { |
319 | dXSARGS; |
09bef843 |
320 | |
321 | if (items != 0) { |
322 | Perl_croak(aTHX_ |
323 | "Usage: attributes::_warn_reserved ()"); |
324 | } |
325 | |
326 | EXTEND(SP,1); |
0006dff7 |
327 | ST(0) = boolSV(ckWARN(WARN_RESERVED)); |
09bef843 |
328 | |
329 | XSRETURN(1); |
330 | } |
331 | |