Remove Encode::Tcl::Extended, suggested by
[p5sagit/p5-mst-13.2.git] / xsutils.c
CommitLineData
d6376244 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 10/*
11 * "Perilous to us all are the devices of an art deeper than we possess
12 * ourselves." --Gandalf
13 */
14
15
09bef843 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 25void XS_attributes__warn_reserved(pTHX_ CV *cv);
26void XS_attributes_reftype(pTHX_ CV *cv);
27void XS_attributes__modify_attrs(pTHX_ CV *cv);
28void XS_attributes__guess_stash(pTHX_ CV *cv);
29void XS_attributes__fetch_attrs(pTHX_ CV *cv);
30void XS_attributes_bootstrap(pTHX_ CV *cv);
349fd7b7 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 42 * version checks in these bootstrap calls are optional.
43 */
44
45void
46Perl_boot_core_xsutils(pTHX)
47{
48 char *file = __FILE__;
49
50 newXS("attributes::bootstrap", XS_attributes_bootstrap, file);
51}
52
349fd7b7 53#include "XSUB.h"
54
55static int
acfe0abc 56modify_SV_attributes(pTHX_ SV *sv, SV **retlist, SV **attrlist, int numattrs)
09bef843 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 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 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 108 continue;
109 }
110 break;
09bef843 111 }
112 break;
113 }
114 break;
115 default:
0256094b 116 switch ((int)len) {
95f0a2f1 117 case 6:
0256094b 118 switch (*name) {
95f0a2f1 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 128 continue;
129 }
130 }
131 }
09bef843 132 break;
133 }
134 /* anything recognized had a 'continue' above */
135 *retlist++ = attr;
136 nret++;
137 }
138
139 return nret;
140}
141
142
09bef843 143
144/* package attributes; */
145
146XS(XS_attributes_bootstrap)
147{
148 dXSARGS;
149 char *file = __FILE__;
150
592f5969 151 if( items > 1 )
152 Perl_croak(aTHX_ "Usage: attributes::bootstrap $module");
b7953727 153
09bef843 154 newXSproto("attributes::_warn_reserved", XS_attributes__warn_reserved, file, "");
155 newXS("attributes::_modify_attrs", XS_attributes__modify_attrs, file);
156 newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, file, "$");
157 newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, file, "$");
158 newXSproto("attributes::reftype", XS_attributes_reftype, file, "$");
159
160 XSRETURN(0);
161}
162
163XS(XS_attributes__modify_attrs)
164{
165 dXSARGS;
166 SV *rv, *sv;
167
168 if (items < 1) {
169usage:
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 180
181 XSRETURN(0);
182}
183
184XS(XS_attributes__fetch_attrs)
185{
186 dXSARGS;
187 SV *rv, *sv;
188 cv_flags_t cvflags;
189
190 if (items != 1) {
191usage:
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 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 219 break;
220 default:
221 break;
222 }
223
224 PUTBACK;
225}
226
227XS(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) {
238usage:
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 262 stash = CvSTASH(sv);
263 break;
264 case SVt_PVMG:
14befaf4 265 if (!(SvFAKE(sv) && SvTIED_mg(sv, PERL_MAGIC_glob)))
09bef843 266 break;
267 /*FALLTHROUGH*/
268 case SVt_PVGV:
6676db26 269 if (GvGP(sv) && GvESTASH((GV*)sv))
09bef843 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
285XS(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) {
296usage:
297 Perl_croak(aTHX_
298 "Usage: attributes::reftype $reference");
299 }
300
301 rv = ST(0);
302 ST(0) = TARG;
4694d0ea 303 if (SvGMAGICAL(rv))
304 mg_get(rv);
121e869f 305 if (!(SvOK(rv) && SvROK(rv)))
09bef843 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
316XS(XS_attributes__warn_reserved)
317{
318 dXSARGS;
09bef843 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