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d6376244 JH |
1 | /* xsutils.c |
2 | * | |
1129b882 | 3 | * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
371fce9b | 4 | * by Larry Wall and others |
d6376244 JH |
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 | /* |
4ac71550 TC |
12 | * 'Perilous to us all are the devices of an art deeper than we possess |
13 | * ourselves.' --Gandalf | |
14 | * | |
15 | * [p.597 of _The Lord of the Rings_, III/xi: "The PalantÃr"] | |
d31a8517 AT |
16 | */ |
17 | ||
18 | ||
09bef843 SB |
19 | #include "EXTERN.h" |
20 | #define PERL_IN_XSUTILS_C | |
21 | #include "perl.h" | |
22 | ||
23 | /* | |
24 | * Contributed by Spider Boardman (spider.boardman@orb.nashua.nh.us). | |
25 | */ | |
26 | ||
349fd7b7 | 27 | /* package attributes; */ |
27da23d5 JH |
28 | PERL_XS_EXPORT_C void XS_attributes_reftype(pTHX_ CV *cv); |
29 | PERL_XS_EXPORT_C void XS_attributes__modify_attrs(pTHX_ CV *cv); | |
30 | PERL_XS_EXPORT_C void XS_attributes__guess_stash(pTHX_ CV *cv); | |
31 | PERL_XS_EXPORT_C void XS_attributes__fetch_attrs(pTHX_ CV *cv); | |
32 | PERL_XS_EXPORT_C void XS_attributes_bootstrap(pTHX_ CV *cv); | |
349fd7b7 GS |
33 | |
34 | ||
35 | /* | |
36 | * Note that only ${pkg}::bootstrap definitions should go here. | |
37 | * This helps keep down the start-up time, which is especially | |
38 | * relevant for users who don't invoke any features which are | |
39 | * (partially) implemented here. | |
40 | * | |
41 | * The various bootstrap definitions can take care of doing | |
42 | * package-specific newXS() calls. Since the layout of the | |
6a34af38 | 43 | * bundled *.pm files is in a version-specific directory, |
349fd7b7 GS |
44 | * version checks in these bootstrap calls are optional. |
45 | */ | |
46 | ||
a4c98449 NC |
47 | static const char file[] = __FILE__; |
48 | ||
349fd7b7 GS |
49 | void |
50 | Perl_boot_core_xsutils(pTHX) | |
51 | { | |
349fd7b7 GS |
52 | newXS("attributes::bootstrap", XS_attributes_bootstrap, file); |
53 | } | |
54 | ||
349fd7b7 GS |
55 | #include "XSUB.h" |
56 | ||
57 | static int | |
acfe0abc | 58 | modify_SV_attributes(pTHX_ SV *sv, SV **retlist, SV **attrlist, int numattrs) |
09bef843 | 59 | { |
97aff369 | 60 | dVAR; |
09bef843 | 61 | SV *attr; |
09bef843 SB |
62 | int nret; |
63 | ||
64 | for (nret = 0 ; numattrs && (attr = *attrlist++); numattrs--) { | |
4373e329 | 65 | STRLEN len; |
cfd0369c | 66 | const char *name = SvPV_const(attr, len); |
4373e329 AL |
67 | const bool negated = (*name == '-'); |
68 | ||
69 | if (negated) { | |
09bef843 SB |
70 | name++; |
71 | len--; | |
72 | } | |
73 | switch (SvTYPE(sv)) { | |
74 | case SVt_PVCV: | |
75 | switch ((int)len) { | |
76 | case 6: | |
8cad210e | 77 | switch (name[3]) { |
09bef843 | 78 | #ifdef CVf_LVALUE |
d5adc3a1 | 79 | case 'l': |
8cad210e | 80 | if (memEQ(name, "lvalue", 6)) { |
09bef843 | 81 | if (negated) |
ea726b52 | 82 | CvFLAGS(MUTABLE_CV(sv)) &= ~CVf_LVALUE; |
09bef843 | 83 | else |
ea726b52 | 84 | CvFLAGS(MUTABLE_CV(sv)) |= CVf_LVALUE; |
09bef843 SB |
85 | continue; |
86 | } | |
8cad210e | 87 | break; |
d5adc3a1 | 88 | #endif |
8cad210e | 89 | case 'k': |
8cad210e | 90 | if (memEQ(name, "locked", 6)) { |
09bef843 | 91 | if (negated) |
ea726b52 | 92 | CvFLAGS(MUTABLE_CV(sv)) &= ~CVf_LOCKED; |
09bef843 | 93 | else |
ea726b52 | 94 | CvFLAGS(MUTABLE_CV(sv)) |= CVf_LOCKED; |
09bef843 SB |
95 | continue; |
96 | } | |
97 | break; | |
8cad210e NC |
98 | case 'h': |
99 | if (memEQ(name, "method", 6)) { | |
09bef843 | 100 | if (negated) |
ea726b52 | 101 | CvFLAGS(MUTABLE_CV(sv)) &= ~CVf_METHOD; |
09bef843 | 102 | else |
ea726b52 | 103 | CvFLAGS(MUTABLE_CV(sv)) |= CVf_METHOD; |
09bef843 SB |
104 | continue; |
105 | } | |
106 | break; | |
107 | } | |
108 | break; | |
109 | } | |
110 | break; | |
111 | default: | |
0256094b | 112 | switch ((int)len) { |
95f0a2f1 | 113 | case 6: |
8cad210e NC |
114 | switch (name[5]) { |
115 | case 'd': | |
116 | if (memEQ(name, "share", 5)) { | |
13c1b207 DM |
117 | if (negated) |
118 | Perl_croak(aTHX_ "A variable may not be unshared"); | |
119 | SvSHARE(sv); | |
120 | continue; | |
121 | } | |
122 | break; | |
8cad210e NC |
123 | case 'e': |
124 | if (memEQ(name, "uniqu", 5)) { | |
6e592b3a | 125 | if (isGV_with_GP(sv)) { |
44f8325f | 126 | if (negated) { |
95f0a2f1 | 127 | GvUNIQUE_off(sv); |
44f8325f | 128 | } else { |
95f0a2f1 | 129 | GvUNIQUE_on(sv); |
44f8325f | 130 | } |
95f0a2f1 SB |
131 | } |
132 | /* Hope this came from toke.c if not a GV. */ | |
0256094b DM |
133 | continue; |
134 | } | |
135 | } | |
136 | } | |
09bef843 SB |
137 | break; |
138 | } | |
139 | /* anything recognized had a 'continue' above */ | |
140 | *retlist++ = attr; | |
141 | nret++; | |
142 | } | |
143 | ||
144 | return nret; | |
145 | } | |
146 | ||
147 | ||
09bef843 SB |
148 | |
149 | /* package attributes; */ | |
150 | ||
151 | XS(XS_attributes_bootstrap) | |
152 | { | |
97aff369 | 153 | dVAR; |
09bef843 | 154 | dXSARGS; |
09bef843 | 155 | |
592f5969 | 156 | if( items > 1 ) |
afa74d42 | 157 | croak_xs_usage(cv, "$module"); |
b7953727 | 158 | |
09bef843 SB |
159 | newXS("attributes::_modify_attrs", XS_attributes__modify_attrs, file); |
160 | newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, file, "$"); | |
161 | newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, file, "$"); | |
162 | newXSproto("attributes::reftype", XS_attributes_reftype, file, "$"); | |
163 | ||
164 | XSRETURN(0); | |
165 | } | |
166 | ||
167 | XS(XS_attributes__modify_attrs) | |
168 | { | |
97aff369 | 169 | dVAR; |
09bef843 SB |
170 | dXSARGS; |
171 | SV *rv, *sv; | |
172 | ||
173 | if (items < 1) { | |
174 | usage: | |
afa74d42 | 175 | croak_xs_usage(cv, "@attributes"); |
09bef843 SB |
176 | } |
177 | ||
178 | rv = ST(0); | |
179 | if (!(SvOK(rv) && SvROK(rv))) | |
180 | goto usage; | |
181 | sv = SvRV(rv); | |
182 | if (items > 1) | |
acfe0abc | 183 | XSRETURN(modify_SV_attributes(aTHX_ sv, &ST(0), &ST(1), items-1)); |
09bef843 SB |
184 | |
185 | XSRETURN(0); | |
186 | } | |
187 | ||
188 | XS(XS_attributes__fetch_attrs) | |
189 | { | |
97aff369 | 190 | dVAR; |
09bef843 SB |
191 | dXSARGS; |
192 | SV *rv, *sv; | |
193 | cv_flags_t cvflags; | |
194 | ||
195 | if (items != 1) { | |
196 | usage: | |
afa74d42 | 197 | croak_xs_usage(cv, "$reference"); |
09bef843 SB |
198 | } |
199 | ||
200 | rv = ST(0); | |
201 | SP -= items; | |
202 | if (!(SvOK(rv) && SvROK(rv))) | |
203 | goto usage; | |
204 | sv = SvRV(rv); | |
205 | ||
206 | switch (SvTYPE(sv)) { | |
207 | case SVt_PVCV: | |
ea726b52 | 208 | cvflags = CvFLAGS((const CV *)sv); |
09bef843 | 209 | if (cvflags & CVf_LOCKED) |
84bafc02 | 210 | XPUSHs(newSVpvs_flags("locked", SVs_TEMP)); |
09bef843 SB |
211 | #ifdef CVf_LVALUE |
212 | if (cvflags & CVf_LVALUE) | |
84bafc02 | 213 | XPUSHs(newSVpvs_flags("lvalue", SVs_TEMP)); |
09bef843 SB |
214 | #endif |
215 | if (cvflags & CVf_METHOD) | |
84bafc02 | 216 | XPUSHs(newSVpvs_flags("method", SVs_TEMP)); |
ea726b52 | 217 | if (GvUNIQUE(CvGV((const CV *)sv))) |
84bafc02 | 218 | XPUSHs(newSVpvs_flags("unique", SVs_TEMP)); |
95f0a2f1 SB |
219 | break; |
220 | case SVt_PVGV: | |
6e592b3a | 221 | if (isGV_with_GP(sv) && GvUNIQUE(sv)) |
84bafc02 | 222 | XPUSHs(newSVpvs_flags("unique", SVs_TEMP)); |
09bef843 SB |
223 | break; |
224 | default: | |
225 | break; | |
226 | } | |
227 | ||
228 | PUTBACK; | |
229 | } | |
230 | ||
231 | XS(XS_attributes__guess_stash) | |
232 | { | |
97aff369 | 233 | dVAR; |
09bef843 SB |
234 | dXSARGS; |
235 | SV *rv, *sv; | |
d277572a | 236 | dXSTARG; |
09bef843 SB |
237 | |
238 | if (items != 1) { | |
239 | usage: | |
afa74d42 | 240 | croak_xs_usage(cv, "$reference"); |
09bef843 SB |
241 | } |
242 | ||
243 | rv = ST(0); | |
244 | ST(0) = TARG; | |
245 | if (!(SvOK(rv) && SvROK(rv))) | |
246 | goto usage; | |
247 | sv = SvRV(rv); | |
248 | ||
249 | if (SvOBJECT(sv)) | |
7423f6db | 250 | sv_setpvn(TARG, HvNAME_get(SvSTASH(sv)), HvNAMELEN_get(SvSTASH(sv))); |
09bef843 SB |
251 | #if 0 /* this was probably a bad idea */ |
252 | else if (SvPADMY(sv)) | |
253 | sv_setsv(TARG, &PL_sv_no); /* unblessed lexical */ | |
254 | #endif | |
255 | else { | |
5c284bb0 | 256 | const HV *stash = NULL; |
09bef843 SB |
257 | switch (SvTYPE(sv)) { |
258 | case SVt_PVCV: | |
6676db26 | 259 | if (CvGV(sv) && isGV(CvGV(sv)) && GvSTASH(CvGV(sv))) |
09bef843 | 260 | stash = GvSTASH(CvGV(sv)); |
6676db26 | 261 | else if (/* !CvANON(sv) && */ CvSTASH(sv)) |
09bef843 SB |
262 | stash = CvSTASH(sv); |
263 | break; | |
09bef843 | 264 | case SVt_PVGV: |
159b6efe NC |
265 | if (isGV_with_GP(sv) && GvGP(sv) && GvESTASH(MUTABLE_GV(sv))) |
266 | stash = GvESTASH(MUTABLE_GV(sv)); | |
09bef843 SB |
267 | break; |
268 | default: | |
269 | break; | |
270 | } | |
271 | if (stash) | |
7423f6db | 272 | sv_setpvn(TARG, HvNAME_get(stash), HvNAMELEN_get(stash)); |
09bef843 SB |
273 | } |
274 | ||
09bef843 | 275 | SvSETMAGIC(TARG); |
09bef843 SB |
276 | XSRETURN(1); |
277 | } | |
278 | ||
279 | XS(XS_attributes_reftype) | |
280 | { | |
97aff369 | 281 | dVAR; |
09bef843 SB |
282 | dXSARGS; |
283 | SV *rv, *sv; | |
d277572a | 284 | dXSTARG; |
09bef843 SB |
285 | |
286 | if (items != 1) { | |
287 | usage: | |
afa74d42 | 288 | croak_xs_usage(cv, "$reference"); |
09bef843 SB |
289 | } |
290 | ||
291 | rv = ST(0); | |
292 | ST(0) = TARG; | |
5b295bef | 293 | SvGETMAGIC(rv); |
121e869f | 294 | if (!(SvOK(rv) && SvROK(rv))) |
09bef843 SB |
295 | goto usage; |
296 | sv = SvRV(rv); | |
297 | sv_setpv(TARG, sv_reftype(sv, 0)); | |
09bef843 | 298 | SvSETMAGIC(TARG); |
09bef843 SB |
299 | |
300 | XSRETURN(1); | |
301 | } | |
302 | ||
66610fdd RGS |
303 | /* |
304 | * Local variables: | |
305 | * c-indentation-style: bsd | |
306 | * c-basic-offset: 4 | |
307 | * indent-tabs-mode: t | |
308 | * End: | |
309 | * | |
37442d52 RGS |
310 | * ex: set ts=8 sts=4 sw=4 noet: |
311 | */ |