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