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d6376244 JH |
1 | /* xsutils.c |
2 | * | |
acde74e1 | 3 | * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, |
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 AT |
11 | /* |
12 | * "Perilous to us all are the devices of an art deeper than we possess | |
13 | * ourselves." --Gandalf | |
14 | */ | |
15 | ||
16 | ||
09bef843 SB |
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 JH |
26 | PERL_XS_EXPORT_C void XS_attributes_reftype(pTHX_ CV *cv); |
27 | PERL_XS_EXPORT_C void XS_attributes__modify_attrs(pTHX_ CV *cv); | |
28 | PERL_XS_EXPORT_C void XS_attributes__guess_stash(pTHX_ CV *cv); | |
29 | PERL_XS_EXPORT_C void XS_attributes__fetch_attrs(pTHX_ CV *cv); | |
30 | PERL_XS_EXPORT_C void XS_attributes_bootstrap(pTHX_ CV *cv); | |
349fd7b7 GS |
31 | |
32 | ||
33 | /* | |
34 | * Note that only ${pkg}::bootstrap definitions should go here. | |
35 | * This helps keep down the start-up time, which is especially | |
36 | * relevant for users who don't invoke any features which are | |
37 | * (partially) implemented here. | |
38 | * | |
39 | * The various bootstrap definitions can take care of doing | |
40 | * package-specific newXS() calls. Since the layout of the | |
6a34af38 | 41 | * bundled *.pm files is in a version-specific directory, |
349fd7b7 GS |
42 | * version checks in these bootstrap calls are optional. |
43 | */ | |
44 | ||
a4c98449 NC |
45 | static const char file[] = __FILE__; |
46 | ||
349fd7b7 GS |
47 | void |
48 | Perl_boot_core_xsutils(pTHX) | |
49 | { | |
349fd7b7 GS |
50 | newXS("attributes::bootstrap", XS_attributes_bootstrap, file); |
51 | } | |
52 | ||
349fd7b7 GS |
53 | #include "XSUB.h" |
54 | ||
55 | static int | |
acfe0abc | 56 | modify_SV_attributes(pTHX_ SV *sv, SV **retlist, SV **attrlist, int numattrs) |
09bef843 | 57 | { |
97aff369 | 58 | dVAR; |
09bef843 | 59 | SV *attr; |
09bef843 SB |
60 | int nret; |
61 | ||
62 | for (nret = 0 ; numattrs && (attr = *attrlist++); numattrs--) { | |
4373e329 | 63 | STRLEN len; |
cfd0369c | 64 | const char *name = SvPV_const(attr, len); |
4373e329 AL |
65 | const bool negated = (*name == '-'); |
66 | ||
67 | if (negated) { | |
09bef843 SB |
68 | name++; |
69 | len--; | |
70 | } | |
71 | switch (SvTYPE(sv)) { | |
72 | case SVt_PVCV: | |
73 | switch ((int)len) { | |
74 | case 6: | |
8cad210e | 75 | switch (name[3]) { |
09bef843 | 76 | #ifdef CVf_LVALUE |
d5adc3a1 | 77 | case 'l': |
8cad210e | 78 | if (memEQ(name, "lvalue", 6)) { |
09bef843 SB |
79 | if (negated) |
80 | CvFLAGS((CV*)sv) &= ~CVf_LVALUE; | |
81 | else | |
82 | CvFLAGS((CV*)sv) |= CVf_LVALUE; | |
83 | continue; | |
84 | } | |
8cad210e | 85 | break; |
d5adc3a1 | 86 | #endif |
8cad210e | 87 | case 'k': |
8cad210e | 88 | if (memEQ(name, "locked", 6)) { |
09bef843 SB |
89 | if (negated) |
90 | CvFLAGS((CV*)sv) &= ~CVf_LOCKED; | |
91 | else | |
92 | CvFLAGS((CV*)sv) |= CVf_LOCKED; | |
93 | continue; | |
94 | } | |
95 | break; | |
8cad210e NC |
96 | case 'h': |
97 | if (memEQ(name, "method", 6)) { | |
09bef843 SB |
98 | if (negated) |
99 | CvFLAGS((CV*)sv) &= ~CVf_METHOD; | |
100 | else | |
101 | CvFLAGS((CV*)sv) |= CVf_METHOD; | |
102 | continue; | |
103 | } | |
104 | break; | |
105 | } | |
106 | break; | |
107 | } | |
108 | break; | |
109 | default: | |
0256094b | 110 | switch ((int)len) { |
95f0a2f1 | 111 | case 6: |
8cad210e NC |
112 | switch (name[5]) { |
113 | case 'd': | |
114 | if (memEQ(name, "share", 5)) { | |
13c1b207 DM |
115 | if (negated) |
116 | Perl_croak(aTHX_ "A variable may not be unshared"); | |
117 | SvSHARE(sv); | |
118 | continue; | |
119 | } | |
120 | break; | |
8cad210e NC |
121 | case 'e': |
122 | if (memEQ(name, "uniqu", 5)) { | |
95f0a2f1 | 123 | if (SvTYPE(sv) == SVt_PVGV) { |
44f8325f | 124 | if (negated) { |
95f0a2f1 | 125 | GvUNIQUE_off(sv); |
44f8325f | 126 | } else { |
95f0a2f1 | 127 | GvUNIQUE_on(sv); |
44f8325f | 128 | } |
95f0a2f1 SB |
129 | } |
130 | /* Hope this came from toke.c if not a GV. */ | |
0256094b DM |
131 | continue; |
132 | } | |
133 | } | |
134 | } | |
09bef843 SB |
135 | break; |
136 | } | |
137 | /* anything recognized had a 'continue' above */ | |
138 | *retlist++ = attr; | |
139 | nret++; | |
140 | } | |
141 | ||
142 | return nret; | |
143 | } | |
144 | ||
145 | ||
09bef843 SB |
146 | |
147 | /* package attributes; */ | |
148 | ||
149 | XS(XS_attributes_bootstrap) | |
150 | { | |
97aff369 | 151 | dVAR; |
09bef843 | 152 | dXSARGS; |
58c0efa5 | 153 | PERL_UNUSED_ARG(cv); |
09bef843 | 154 | |
592f5969 MS |
155 | if( items > 1 ) |
156 | Perl_croak(aTHX_ "Usage: attributes::bootstrap $module"); | |
b7953727 | 157 | |
09bef843 SB |
158 | newXS("attributes::_modify_attrs", XS_attributes__modify_attrs, file); |
159 | newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, file, "$"); | |
160 | newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, file, "$"); | |
161 | newXSproto("attributes::reftype", XS_attributes_reftype, file, "$"); | |
162 | ||
163 | XSRETURN(0); | |
164 | } | |
165 | ||
166 | XS(XS_attributes__modify_attrs) | |
167 | { | |
97aff369 | 168 | dVAR; |
09bef843 SB |
169 | dXSARGS; |
170 | SV *rv, *sv; | |
58c0efa5 | 171 | PERL_UNUSED_ARG(cv); |
09bef843 SB |
172 | |
173 | if (items < 1) { | |
174 | usage: | |
175 | Perl_croak(aTHX_ | |
176 | "Usage: attributes::_modify_attrs $reference, @attributes"); | |
177 | } | |
178 | ||
179 | rv = ST(0); | |
180 | if (!(SvOK(rv) && SvROK(rv))) | |
181 | goto usage; | |
182 | sv = SvRV(rv); | |
183 | if (items > 1) | |
acfe0abc | 184 | XSRETURN(modify_SV_attributes(aTHX_ sv, &ST(0), &ST(1), items-1)); |
09bef843 SB |
185 | |
186 | XSRETURN(0); | |
187 | } | |
188 | ||
189 | XS(XS_attributes__fetch_attrs) | |
190 | { | |
97aff369 | 191 | dVAR; |
09bef843 SB |
192 | dXSARGS; |
193 | SV *rv, *sv; | |
194 | cv_flags_t cvflags; | |
58c0efa5 | 195 | PERL_UNUSED_ARG(cv); |
09bef843 SB |
196 | |
197 | if (items != 1) { | |
198 | usage: | |
199 | Perl_croak(aTHX_ | |
200 | "Usage: attributes::_fetch_attrs $reference"); | |
201 | } | |
202 | ||
203 | rv = ST(0); | |
204 | SP -= items; | |
205 | if (!(SvOK(rv) && SvROK(rv))) | |
206 | goto usage; | |
207 | sv = SvRV(rv); | |
208 | ||
209 | switch (SvTYPE(sv)) { | |
210 | case SVt_PVCV: | |
211 | cvflags = CvFLAGS((CV*)sv); | |
212 | if (cvflags & CVf_LOCKED) | |
396482e1 | 213 | XPUSHs(sv_2mortal(newSVpvs("locked"))); |
09bef843 SB |
214 | #ifdef CVf_LVALUE |
215 | if (cvflags & CVf_LVALUE) | |
396482e1 | 216 | XPUSHs(sv_2mortal(newSVpvs("lvalue"))); |
09bef843 SB |
217 | #endif |
218 | if (cvflags & CVf_METHOD) | |
396482e1 | 219 | XPUSHs(sv_2mortal(newSVpvs("method"))); |
7fb37951 | 220 | if (GvUNIQUE(CvGV((CV*)sv))) |
396482e1 | 221 | XPUSHs(sv_2mortal(newSVpvs("unique"))); |
95f0a2f1 SB |
222 | break; |
223 | case SVt_PVGV: | |
224 | if (GvUNIQUE(sv)) | |
396482e1 | 225 | XPUSHs(sv_2mortal(newSVpvs("unique"))); |
09bef843 SB |
226 | break; |
227 | default: | |
228 | break; | |
229 | } | |
230 | ||
231 | PUTBACK; | |
232 | } | |
233 | ||
234 | XS(XS_attributes__guess_stash) | |
235 | { | |
97aff369 | 236 | dVAR; |
09bef843 SB |
237 | dXSARGS; |
238 | SV *rv, *sv; | |
d277572a | 239 | dXSTARG; |
58c0efa5 | 240 | PERL_UNUSED_ARG(cv); |
09bef843 SB |
241 | |
242 | if (items != 1) { | |
243 | usage: | |
244 | Perl_croak(aTHX_ | |
245 | "Usage: attributes::_guess_stash $reference"); | |
246 | } | |
247 | ||
248 | rv = ST(0); | |
249 | ST(0) = TARG; | |
250 | if (!(SvOK(rv) && SvROK(rv))) | |
251 | goto usage; | |
252 | sv = SvRV(rv); | |
253 | ||
254 | if (SvOBJECT(sv)) | |
7423f6db | 255 | sv_setpvn(TARG, HvNAME_get(SvSTASH(sv)), HvNAMELEN_get(SvSTASH(sv))); |
09bef843 SB |
256 | #if 0 /* this was probably a bad idea */ |
257 | else if (SvPADMY(sv)) | |
258 | sv_setsv(TARG, &PL_sv_no); /* unblessed lexical */ | |
259 | #endif | |
260 | else { | |
5c284bb0 | 261 | const HV *stash = NULL; |
09bef843 SB |
262 | switch (SvTYPE(sv)) { |
263 | case SVt_PVCV: | |
6676db26 | 264 | if (CvGV(sv) && isGV(CvGV(sv)) && GvSTASH(CvGV(sv))) |
09bef843 | 265 | stash = GvSTASH(CvGV(sv)); |
6676db26 | 266 | else if (/* !CvANON(sv) && */ CvSTASH(sv)) |
09bef843 SB |
267 | stash = CvSTASH(sv); |
268 | break; | |
09bef843 | 269 | case SVt_PVGV: |
6676db26 | 270 | if (GvGP(sv) && GvESTASH((GV*)sv)) |
09bef843 SB |
271 | stash = GvESTASH((GV*)sv); |
272 | break; | |
273 | default: | |
274 | break; | |
275 | } | |
276 | if (stash) | |
7423f6db | 277 | sv_setpvn(TARG, HvNAME_get(stash), HvNAMELEN_get(stash)); |
09bef843 SB |
278 | } |
279 | ||
09bef843 | 280 | SvSETMAGIC(TARG); |
09bef843 SB |
281 | XSRETURN(1); |
282 | } | |
283 | ||
284 | XS(XS_attributes_reftype) | |
285 | { | |
97aff369 | 286 | dVAR; |
09bef843 SB |
287 | dXSARGS; |
288 | SV *rv, *sv; | |
d277572a | 289 | dXSTARG; |
58c0efa5 | 290 | PERL_UNUSED_ARG(cv); |
09bef843 SB |
291 | |
292 | if (items != 1) { | |
293 | usage: | |
294 | Perl_croak(aTHX_ | |
295 | "Usage: attributes::reftype $reference"); | |
296 | } | |
297 | ||
298 | rv = ST(0); | |
299 | ST(0) = TARG; | |
5b295bef | 300 | SvGETMAGIC(rv); |
121e869f | 301 | if (!(SvOK(rv) && SvROK(rv))) |
09bef843 SB |
302 | goto usage; |
303 | sv = SvRV(rv); | |
304 | sv_setpv(TARG, sv_reftype(sv, 0)); | |
09bef843 | 305 | SvSETMAGIC(TARG); |
09bef843 SB |
306 | |
307 | XSRETURN(1); | |
308 | } | |
309 | ||
66610fdd RGS |
310 | /* |
311 | * Local variables: | |
312 | * c-indentation-style: bsd | |
313 | * c-basic-offset: 4 | |
314 | * indent-tabs-mode: t | |
315 | * End: | |
316 | * | |
37442d52 RGS |
317 | * ex: set ts=8 sts=4 sw=4 noet: |
318 | */ |