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d6376244 JH |
1 | /* xsutils.c |
2 | * | |
371fce9b DM |
3 | * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, |
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; */ |
acfe0abc GS |
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); | |
349fd7b7 GS |
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 | |
6a34af38 | 42 | * bundled *.pm files is in a version-specific directory, |
349fd7b7 GS |
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 | ||
349fd7b7 GS |
54 | #include "XSUB.h" |
55 | ||
56 | static int | |
acfe0abc | 57 | modify_SV_attributes(pTHX_ SV *sv, SV **retlist, SV **attrlist, int numattrs) |
09bef843 SB |
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 SB |
68 | name++; |
69 | len--; | |
70 | } | |
71 | switch (SvTYPE(sv)) { | |
72 | case SVt_PVCV: | |
73 | switch ((int)len) { | |
74 | case 6: | |
75 | switch (*name) { | |
06492da6 SF |
76 | case 'a': |
77 | if (strEQ(name, "assertion")) { | |
78 | if (negated) | |
79 | CvFLAGS((CV*)sv) &= ~CVf_ASSERTION; | |
80 | else | |
81 | CvFLAGS((CV*)sv) |= CVf_ASSERTION; | |
82 | continue; | |
83 | } | |
84 | break; | |
09bef843 SB |
85 | case 'l': |
86 | #ifdef CVf_LVALUE | |
87 | if (strEQ(name, "lvalue")) { | |
88 | if (negated) | |
89 | CvFLAGS((CV*)sv) &= ~CVf_LVALUE; | |
90 | else | |
91 | CvFLAGS((CV*)sv) |= CVf_LVALUE; | |
92 | continue; | |
93 | } | |
94 | #endif /* defined CVf_LVALUE */ | |
95 | if (strEQ(name, "locked")) { | |
96 | if (negated) | |
97 | CvFLAGS((CV*)sv) &= ~CVf_LOCKED; | |
98 | else | |
99 | CvFLAGS((CV*)sv) |= CVf_LOCKED; | |
100 | continue; | |
101 | } | |
102 | break; | |
103 | case 'm': | |
104 | if (strEQ(name, "method")) { | |
105 | if (negated) | |
106 | CvFLAGS((CV*)sv) &= ~CVf_METHOD; | |
107 | else | |
108 | CvFLAGS((CV*)sv) |= CVf_METHOD; | |
109 | continue; | |
110 | } | |
111 | break; | |
112 | } | |
113 | break; | |
114 | } | |
115 | break; | |
116 | default: | |
0256094b | 117 | switch ((int)len) { |
95f0a2f1 | 118 | case 6: |
0256094b | 119 | switch (*name) { |
13c1b207 DM |
120 | case 's': |
121 | if (strEQ(name, "shared")) { | |
122 | if (negated) | |
123 | Perl_croak(aTHX_ "A variable may not be unshared"); | |
124 | SvSHARE(sv); | |
125 | continue; | |
126 | } | |
127 | break; | |
95f0a2f1 SB |
128 | case 'u': |
129 | if (strEQ(name, "unique")) { | |
130 | if (SvTYPE(sv) == SVt_PVGV) { | |
131 | if (negated) | |
132 | GvUNIQUE_off(sv); | |
133 | else | |
134 | GvUNIQUE_on(sv); | |
135 | } | |
136 | /* Hope this came from toke.c if not a GV. */ | |
0256094b DM |
137 | continue; |
138 | } | |
139 | } | |
140 | } | |
09bef843 SB |
141 | break; |
142 | } | |
143 | /* anything recognized had a 'continue' above */ | |
144 | *retlist++ = attr; | |
145 | nret++; | |
146 | } | |
147 | ||
148 | return nret; | |
149 | } | |
150 | ||
151 | ||
09bef843 SB |
152 | |
153 | /* package attributes; */ | |
154 | ||
155 | XS(XS_attributes_bootstrap) | |
156 | { | |
157 | dXSARGS; | |
158 | char *file = __FILE__; | |
159 | ||
592f5969 MS |
160 | if( items > 1 ) |
161 | Perl_croak(aTHX_ "Usage: attributes::bootstrap $module"); | |
b7953727 | 162 | |
09bef843 SB |
163 | newXSproto("attributes::_warn_reserved", XS_attributes__warn_reserved, file, ""); |
164 | newXS("attributes::_modify_attrs", XS_attributes__modify_attrs, file); | |
165 | newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, file, "$"); | |
166 | newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, file, "$"); | |
167 | newXSproto("attributes::reftype", XS_attributes_reftype, file, "$"); | |
168 | ||
169 | XSRETURN(0); | |
170 | } | |
171 | ||
172 | XS(XS_attributes__modify_attrs) | |
173 | { | |
174 | dXSARGS; | |
175 | SV *rv, *sv; | |
176 | ||
177 | if (items < 1) { | |
178 | usage: | |
179 | Perl_croak(aTHX_ | |
180 | "Usage: attributes::_modify_attrs $reference, @attributes"); | |
181 | } | |
182 | ||
183 | rv = ST(0); | |
184 | if (!(SvOK(rv) && SvROK(rv))) | |
185 | goto usage; | |
186 | sv = SvRV(rv); | |
187 | if (items > 1) | |
acfe0abc | 188 | XSRETURN(modify_SV_attributes(aTHX_ sv, &ST(0), &ST(1), items-1)); |
09bef843 SB |
189 | |
190 | XSRETURN(0); | |
191 | } | |
192 | ||
193 | XS(XS_attributes__fetch_attrs) | |
194 | { | |
195 | dXSARGS; | |
196 | SV *rv, *sv; | |
197 | cv_flags_t cvflags; | |
198 | ||
199 | if (items != 1) { | |
200 | usage: | |
201 | Perl_croak(aTHX_ | |
202 | "Usage: attributes::_fetch_attrs $reference"); | |
203 | } | |
204 | ||
205 | rv = ST(0); | |
206 | SP -= items; | |
207 | if (!(SvOK(rv) && SvROK(rv))) | |
208 | goto usage; | |
209 | sv = SvRV(rv); | |
210 | ||
211 | switch (SvTYPE(sv)) { | |
212 | case SVt_PVCV: | |
213 | cvflags = CvFLAGS((CV*)sv); | |
214 | if (cvflags & CVf_LOCKED) | |
215 | XPUSHs(sv_2mortal(newSVpvn("locked", 6))); | |
216 | #ifdef CVf_LVALUE | |
217 | if (cvflags & CVf_LVALUE) | |
218 | XPUSHs(sv_2mortal(newSVpvn("lvalue", 6))); | |
219 | #endif | |
220 | if (cvflags & CVf_METHOD) | |
221 | XPUSHs(sv_2mortal(newSVpvn("method", 6))); | |
7fb37951 | 222 | if (GvUNIQUE(CvGV((CV*)sv))) |
95f0a2f1 | 223 | XPUSHs(sv_2mortal(newSVpvn("unique", 6))); |
06492da6 SF |
224 | if (cvflags & CVf_ASSERTION) |
225 | XPUSHs(sv_2mortal(newSVpvn("assertion", 9))); | |
95f0a2f1 SB |
226 | break; |
227 | case SVt_PVGV: | |
228 | if (GvUNIQUE(sv)) | |
229 | XPUSHs(sv_2mortal(newSVpvn("unique", 6))); | |
09bef843 SB |
230 | break; |
231 | default: | |
232 | break; | |
233 | } | |
234 | ||
235 | PUTBACK; | |
236 | } | |
237 | ||
238 | XS(XS_attributes__guess_stash) | |
239 | { | |
240 | dXSARGS; | |
241 | SV *rv, *sv; | |
242 | #ifdef dXSTARGET | |
243 | dXSTARGET; | |
244 | #else | |
245 | SV * TARG = sv_newmortal(); | |
246 | #endif | |
247 | ||
248 | if (items != 1) { | |
249 | usage: | |
250 | Perl_croak(aTHX_ | |
251 | "Usage: attributes::_guess_stash $reference"); | |
252 | } | |
253 | ||
254 | rv = ST(0); | |
255 | ST(0) = TARG; | |
256 | if (!(SvOK(rv) && SvROK(rv))) | |
257 | goto usage; | |
258 | sv = SvRV(rv); | |
259 | ||
260 | if (SvOBJECT(sv)) | |
261 | sv_setpv(TARG, HvNAME(SvSTASH(sv))); | |
262 | #if 0 /* this was probably a bad idea */ | |
263 | else if (SvPADMY(sv)) | |
264 | sv_setsv(TARG, &PL_sv_no); /* unblessed lexical */ | |
265 | #endif | |
266 | else { | |
267 | HV *stash = Nullhv; | |
268 | switch (SvTYPE(sv)) { | |
269 | case SVt_PVCV: | |
6676db26 | 270 | if (CvGV(sv) && isGV(CvGV(sv)) && GvSTASH(CvGV(sv))) |
09bef843 | 271 | stash = GvSTASH(CvGV(sv)); |
6676db26 | 272 | else if (/* !CvANON(sv) && */ CvSTASH(sv)) |
09bef843 SB |
273 | stash = CvSTASH(sv); |
274 | break; | |
275 | case SVt_PVMG: | |
14befaf4 | 276 | if (!(SvFAKE(sv) && SvTIED_mg(sv, PERL_MAGIC_glob))) |
09bef843 SB |
277 | break; |
278 | /*FALLTHROUGH*/ | |
279 | case SVt_PVGV: | |
6676db26 | 280 | if (GvGP(sv) && GvESTASH((GV*)sv)) |
09bef843 SB |
281 | stash = GvESTASH((GV*)sv); |
282 | break; | |
283 | default: | |
284 | break; | |
285 | } | |
286 | if (stash) | |
287 | sv_setpv(TARG, HvNAME(stash)); | |
288 | } | |
289 | ||
290 | #ifdef dXSTARGET | |
291 | SvSETMAGIC(TARG); | |
292 | #endif | |
293 | XSRETURN(1); | |
294 | } | |
295 | ||
296 | XS(XS_attributes_reftype) | |
297 | { | |
298 | dXSARGS; | |
299 | SV *rv, *sv; | |
300 | #ifdef dXSTARGET | |
301 | dXSTARGET; | |
302 | #else | |
303 | SV * TARG = sv_newmortal(); | |
304 | #endif | |
305 | ||
306 | if (items != 1) { | |
307 | usage: | |
308 | Perl_croak(aTHX_ | |
309 | "Usage: attributes::reftype $reference"); | |
310 | } | |
311 | ||
312 | rv = ST(0); | |
313 | ST(0) = TARG; | |
4694d0ea GS |
314 | if (SvGMAGICAL(rv)) |
315 | mg_get(rv); | |
121e869f | 316 | if (!(SvOK(rv) && SvROK(rv))) |
09bef843 SB |
317 | goto usage; |
318 | sv = SvRV(rv); | |
319 | sv_setpv(TARG, sv_reftype(sv, 0)); | |
320 | #ifdef dXSTARGET | |
321 | SvSETMAGIC(TARG); | |
322 | #endif | |
323 | ||
324 | XSRETURN(1); | |
325 | } | |
326 | ||
327 | XS(XS_attributes__warn_reserved) | |
328 | { | |
329 | dXSARGS; | |
09bef843 SB |
330 | #ifdef dXSTARGET |
331 | dXSTARGET; | |
332 | #else | |
333 | SV * TARG = sv_newmortal(); | |
334 | #endif | |
335 | ||
336 | if (items != 0) { | |
337 | Perl_croak(aTHX_ | |
338 | "Usage: attributes::_warn_reserved ()"); | |
339 | } | |
340 | ||
341 | EXTEND(SP,1); | |
342 | ST(0) = TARG; | |
343 | sv_setiv(TARG, ckWARN(WARN_RESERVED) != 0); | |
344 | #ifdef dXSTARGET | |
345 | SvSETMAGIC(TARG); | |
346 | #endif | |
347 | ||
348 | XSRETURN(1); | |
349 | } | |
350 |