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d6376244 JH |
1 | /* xsutils.c |
2 | * | |
4bb101f2 | 3 | * Copyright (C) 1999, 2000, 2001, 2002, 2003, by Larry Wall and others |
d6376244 JH |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public | |
6 | * License or the Artistic License, as specified in the README file. | |
7 | * | |
8 | */ | |
9 | ||
d31a8517 AT |
10 | /* |
11 | * "Perilous to us all are the devices of an art deeper than we possess | |
12 | * ourselves." --Gandalf | |
13 | */ | |
14 | ||
15 | ||
09bef843 SB |
16 | #include "EXTERN.h" |
17 | #define PERL_IN_XSUTILS_C | |
18 | #include "perl.h" | |
19 | ||
20 | /* | |
21 | * Contributed by Spider Boardman (spider.boardman@orb.nashua.nh.us). | |
22 | */ | |
23 | ||
349fd7b7 | 24 | /* package attributes; */ |
acfe0abc GS |
25 | void XS_attributes__warn_reserved(pTHX_ CV *cv); |
26 | void XS_attributes_reftype(pTHX_ CV *cv); | |
27 | void XS_attributes__modify_attrs(pTHX_ CV *cv); | |
28 | void XS_attributes__guess_stash(pTHX_ CV *cv); | |
29 | void XS_attributes__fetch_attrs(pTHX_ CV *cv); | |
30 | 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 | ||
45 | void | |
46 | Perl_boot_core_xsutils(pTHX) | |
47 | { | |
48 | char *file = __FILE__; | |
49 | ||
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 SB |
57 | { |
58 | SV *attr; | |
59 | char *name; | |
60 | STRLEN len; | |
61 | bool negated; | |
62 | int nret; | |
63 | ||
64 | for (nret = 0 ; numattrs && (attr = *attrlist++); numattrs--) { | |
65 | name = SvPV(attr, len); | |
155aba94 | 66 | if ((negated = (*name == '-'))) { |
09bef843 SB |
67 | name++; |
68 | len--; | |
69 | } | |
70 | switch (SvTYPE(sv)) { | |
71 | case SVt_PVCV: | |
72 | switch ((int)len) { | |
73 | case 6: | |
74 | switch (*name) { | |
06492da6 SF |
75 | case 'a': |
76 | if (strEQ(name, "assertion")) { | |
77 | if (negated) | |
78 | CvFLAGS((CV*)sv) &= ~CVf_ASSERTION; | |
79 | else | |
80 | CvFLAGS((CV*)sv) |= CVf_ASSERTION; | |
81 | continue; | |
82 | } | |
83 | break; | |
09bef843 SB |
84 | case 'l': |
85 | #ifdef CVf_LVALUE | |
86 | if (strEQ(name, "lvalue")) { | |
87 | if (negated) | |
88 | CvFLAGS((CV*)sv) &= ~CVf_LVALUE; | |
89 | else | |
90 | CvFLAGS((CV*)sv) |= CVf_LVALUE; | |
91 | continue; | |
92 | } | |
93 | #endif /* defined CVf_LVALUE */ | |
94 | if (strEQ(name, "locked")) { | |
95 | if (negated) | |
96 | CvFLAGS((CV*)sv) &= ~CVf_LOCKED; | |
97 | else | |
98 | CvFLAGS((CV*)sv) |= CVf_LOCKED; | |
99 | continue; | |
100 | } | |
101 | break; | |
102 | case 'm': | |
103 | if (strEQ(name, "method")) { | |
104 | if (negated) | |
105 | CvFLAGS((CV*)sv) &= ~CVf_METHOD; | |
106 | else | |
107 | CvFLAGS((CV*)sv) |= CVf_METHOD; | |
108 | continue; | |
109 | } | |
110 | break; | |
95f0a2f1 SB |
111 | case 'u': |
112 | if (strEQ(name, "unique")) { | |
0256094b | 113 | if (negated) |
7fb37951 | 114 | GvUNIQUE_off(CvGV((CV*)sv)); |
0256094b | 115 | else |
7fb37951 | 116 | GvUNIQUE_on(CvGV((CV*)sv)); |
0256094b DM |
117 | continue; |
118 | } | |
119 | break; | |
09bef843 SB |
120 | } |
121 | break; | |
122 | } | |
123 | break; | |
124 | default: | |
0256094b | 125 | switch ((int)len) { |
95f0a2f1 | 126 | case 6: |
0256094b | 127 | switch (*name) { |
13c1b207 DM |
128 | case 's': |
129 | if (strEQ(name, "shared")) { | |
130 | if (negated) | |
131 | Perl_croak(aTHX_ "A variable may not be unshared"); | |
132 | SvSHARE(sv); | |
133 | continue; | |
134 | } | |
135 | break; | |
95f0a2f1 SB |
136 | case 'u': |
137 | if (strEQ(name, "unique")) { | |
138 | if (SvTYPE(sv) == SVt_PVGV) { | |
139 | if (negated) | |
140 | GvUNIQUE_off(sv); | |
141 | else | |
142 | GvUNIQUE_on(sv); | |
143 | } | |
144 | /* Hope this came from toke.c if not a GV. */ | |
0256094b DM |
145 | continue; |
146 | } | |
147 | } | |
148 | } | |
09bef843 SB |
149 | break; |
150 | } | |
151 | /* anything recognized had a 'continue' above */ | |
152 | *retlist++ = attr; | |
153 | nret++; | |
154 | } | |
155 | ||
156 | return nret; | |
157 | } | |
158 | ||
159 | ||
09bef843 SB |
160 | |
161 | /* package attributes; */ | |
162 | ||
163 | XS(XS_attributes_bootstrap) | |
164 | { | |
165 | dXSARGS; | |
166 | char *file = __FILE__; | |
167 | ||
592f5969 MS |
168 | if( items > 1 ) |
169 | Perl_croak(aTHX_ "Usage: attributes::bootstrap $module"); | |
b7953727 | 170 | |
09bef843 SB |
171 | newXSproto("attributes::_warn_reserved", XS_attributes__warn_reserved, file, ""); |
172 | newXS("attributes::_modify_attrs", XS_attributes__modify_attrs, file); | |
173 | newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, file, "$"); | |
174 | newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, file, "$"); | |
175 | newXSproto("attributes::reftype", XS_attributes_reftype, file, "$"); | |
176 | ||
177 | XSRETURN(0); | |
178 | } | |
179 | ||
180 | XS(XS_attributes__modify_attrs) | |
181 | { | |
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 SB |
197 | |
198 | XSRETURN(0); | |
199 | } | |
200 | ||
201 | XS(XS_attributes__fetch_attrs) | |
202 | { | |
203 | dXSARGS; | |
204 | SV *rv, *sv; | |
205 | cv_flags_t cvflags; | |
206 | ||
207 | if (items != 1) { | |
208 | usage: | |
209 | Perl_croak(aTHX_ | |
210 | "Usage: attributes::_fetch_attrs $reference"); | |
211 | } | |
212 | ||
213 | rv = ST(0); | |
214 | SP -= items; | |
215 | if (!(SvOK(rv) && SvROK(rv))) | |
216 | goto usage; | |
217 | sv = SvRV(rv); | |
218 | ||
219 | switch (SvTYPE(sv)) { | |
220 | case SVt_PVCV: | |
221 | cvflags = CvFLAGS((CV*)sv); | |
222 | if (cvflags & CVf_LOCKED) | |
223 | XPUSHs(sv_2mortal(newSVpvn("locked", 6))); | |
224 | #ifdef CVf_LVALUE | |
225 | if (cvflags & CVf_LVALUE) | |
226 | XPUSHs(sv_2mortal(newSVpvn("lvalue", 6))); | |
227 | #endif | |
228 | if (cvflags & CVf_METHOD) | |
229 | XPUSHs(sv_2mortal(newSVpvn("method", 6))); | |
7fb37951 | 230 | if (GvUNIQUE(CvGV((CV*)sv))) |
95f0a2f1 | 231 | XPUSHs(sv_2mortal(newSVpvn("unique", 6))); |
06492da6 SF |
232 | if (cvflags & CVf_ASSERTION) |
233 | XPUSHs(sv_2mortal(newSVpvn("assertion", 9))); | |
95f0a2f1 SB |
234 | break; |
235 | case SVt_PVGV: | |
236 | if (GvUNIQUE(sv)) | |
237 | XPUSHs(sv_2mortal(newSVpvn("unique", 6))); | |
09bef843 SB |
238 | break; |
239 | default: | |
240 | break; | |
241 | } | |
242 | ||
243 | PUTBACK; | |
244 | } | |
245 | ||
246 | XS(XS_attributes__guess_stash) | |
247 | { | |
248 | dXSARGS; | |
249 | SV *rv, *sv; | |
250 | #ifdef dXSTARGET | |
251 | dXSTARGET; | |
252 | #else | |
253 | SV * TARG = sv_newmortal(); | |
254 | #endif | |
255 | ||
256 | if (items != 1) { | |
257 | usage: | |
258 | Perl_croak(aTHX_ | |
259 | "Usage: attributes::_guess_stash $reference"); | |
260 | } | |
261 | ||
262 | rv = ST(0); | |
263 | ST(0) = TARG; | |
264 | if (!(SvOK(rv) && SvROK(rv))) | |
265 | goto usage; | |
266 | sv = SvRV(rv); | |
267 | ||
268 | if (SvOBJECT(sv)) | |
269 | sv_setpv(TARG, HvNAME(SvSTASH(sv))); | |
270 | #if 0 /* this was probably a bad idea */ | |
271 | else if (SvPADMY(sv)) | |
272 | sv_setsv(TARG, &PL_sv_no); /* unblessed lexical */ | |
273 | #endif | |
274 | else { | |
275 | HV *stash = Nullhv; | |
276 | switch (SvTYPE(sv)) { | |
277 | case SVt_PVCV: | |
6676db26 | 278 | if (CvGV(sv) && isGV(CvGV(sv)) && GvSTASH(CvGV(sv))) |
09bef843 | 279 | stash = GvSTASH(CvGV(sv)); |
6676db26 | 280 | else if (/* !CvANON(sv) && */ CvSTASH(sv)) |
09bef843 SB |
281 | stash = CvSTASH(sv); |
282 | break; | |
283 | case SVt_PVMG: | |
14befaf4 | 284 | if (!(SvFAKE(sv) && SvTIED_mg(sv, PERL_MAGIC_glob))) |
09bef843 SB |
285 | break; |
286 | /*FALLTHROUGH*/ | |
287 | case SVt_PVGV: | |
6676db26 | 288 | if (GvGP(sv) && GvESTASH((GV*)sv)) |
09bef843 SB |
289 | stash = GvESTASH((GV*)sv); |
290 | break; | |
291 | default: | |
292 | break; | |
293 | } | |
294 | if (stash) | |
295 | sv_setpv(TARG, HvNAME(stash)); | |
296 | } | |
297 | ||
298 | #ifdef dXSTARGET | |
299 | SvSETMAGIC(TARG); | |
300 | #endif | |
301 | XSRETURN(1); | |
302 | } | |
303 | ||
304 | XS(XS_attributes_reftype) | |
305 | { | |
306 | dXSARGS; | |
307 | SV *rv, *sv; | |
308 | #ifdef dXSTARGET | |
309 | dXSTARGET; | |
310 | #else | |
311 | SV * TARG = sv_newmortal(); | |
312 | #endif | |
313 | ||
314 | if (items != 1) { | |
315 | usage: | |
316 | Perl_croak(aTHX_ | |
317 | "Usage: attributes::reftype $reference"); | |
318 | } | |
319 | ||
320 | rv = ST(0); | |
321 | ST(0) = TARG; | |
4694d0ea GS |
322 | if (SvGMAGICAL(rv)) |
323 | mg_get(rv); | |
121e869f | 324 | if (!(SvOK(rv) && SvROK(rv))) |
09bef843 SB |
325 | goto usage; |
326 | sv = SvRV(rv); | |
327 | sv_setpv(TARG, sv_reftype(sv, 0)); | |
328 | #ifdef dXSTARGET | |
329 | SvSETMAGIC(TARG); | |
330 | #endif | |
331 | ||
332 | XSRETURN(1); | |
333 | } | |
334 | ||
335 | XS(XS_attributes__warn_reserved) | |
336 | { | |
337 | dXSARGS; | |
09bef843 SB |
338 | #ifdef dXSTARGET |
339 | dXSTARGET; | |
340 | #else | |
341 | SV * TARG = sv_newmortal(); | |
342 | #endif | |
343 | ||
344 | if (items != 0) { | |
345 | Perl_croak(aTHX_ | |
346 | "Usage: attributes::_warn_reserved ()"); | |
347 | } | |
348 | ||
349 | EXTEND(SP,1); | |
350 | ST(0) = TARG; | |
351 | sv_setiv(TARG, ckWARN(WARN_RESERVED) != 0); | |
352 | #ifdef dXSTARGET | |
353 | SvSETMAGIC(TARG); | |
354 | #endif | |
355 | ||
356 | XSRETURN(1); | |
357 | } | |
358 |