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d6376244 JH |
1 | /* xsutils.c |
2 | * | |
2c351e65 | 3 | * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, |
7a3458b7 | 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; */ |
fe20fd30 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 | ||
233541ae NC |
45 | static const char file[] = __FILE__; |
46 | ||
349fd7b7 GS |
47 | void |
48 | Perl_boot_core_xsutils(pTHX) | |
49 | { | |
5d1ca38b | 50 | newXS("attributes::bootstrap", XS_attributes_bootstrap, (char *)file); |
349fd7b7 GS |
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; | |
09bef843 SB |
59 | int nret; |
60 | ||
61 | for (nret = 0 ; numattrs && (attr = *attrlist++); numattrs--) { | |
065cbbe5 | 62 | STRLEN len; |
71a0dd65 | 63 | const char *name = SvPV_const(attr, len); |
065cbbe5 AL |
64 | const bool negated = (*name == '-'); |
65 | ||
66 | if (negated) { | |
09bef843 SB |
67 | name++; |
68 | len--; | |
69 | } | |
70 | switch (SvTYPE(sv)) { | |
71 | case SVt_PVCV: | |
72 | switch ((int)len) { | |
048e79d5 NC |
73 | #ifdef CVf_ASSERTION |
74 | case 9: | |
04851bb3 | 75 | if (memEQ(name, "assertion", 9)) { |
048e79d5 NC |
76 | if (negated) |
77 | CvFLAGS((CV*)sv) &= ~CVf_ASSERTION; | |
78 | else | |
79 | CvFLAGS((CV*)sv) |= CVf_ASSERTION; | |
80 | continue; | |
81 | } | |
82 | break; | |
83 | #endif | |
09bef843 | 84 | case 6: |
04851bb3 | 85 | switch (name[3]) { |
09bef843 | 86 | #ifdef CVf_LVALUE |
2b6fd568 | 87 | case 'l': |
04851bb3 | 88 | if (memEQ(name, "lvalue", 6)) { |
09bef843 SB |
89 | if (negated) |
90 | CvFLAGS((CV*)sv) &= ~CVf_LVALUE; | |
91 | else | |
92 | CvFLAGS((CV*)sv) |= CVf_LVALUE; | |
93 | continue; | |
94 | } | |
04851bb3 | 95 | break; |
2b6fd568 | 96 | #endif |
04851bb3 | 97 | case 'k': |
04851bb3 | 98 | if (memEQ(name, "locked", 6)) { |
09bef843 SB |
99 | if (negated) |
100 | CvFLAGS((CV*)sv) &= ~CVf_LOCKED; | |
101 | else | |
102 | CvFLAGS((CV*)sv) |= CVf_LOCKED; | |
103 | continue; | |
104 | } | |
105 | break; | |
04851bb3 NC |
106 | case 'h': |
107 | if (memEQ(name, "method", 6)) { | |
09bef843 SB |
108 | if (negated) |
109 | CvFLAGS((CV*)sv) &= ~CVf_METHOD; | |
110 | else | |
111 | CvFLAGS((CV*)sv) |= CVf_METHOD; | |
112 | continue; | |
113 | } | |
114 | break; | |
115 | } | |
116 | break; | |
117 | } | |
118 | break; | |
119 | default: | |
0256094b | 120 | switch ((int)len) { |
95f0a2f1 | 121 | case 6: |
04851bb3 NC |
122 | switch (name[5]) { |
123 | case 'd': | |
124 | if (memEQ(name, "share", 5)) { | |
13c1b207 DM |
125 | if (negated) |
126 | Perl_croak(aTHX_ "A variable may not be unshared"); | |
127 | SvSHARE(sv); | |
128 | continue; | |
129 | } | |
130 | break; | |
04851bb3 NC |
131 | case 'e': |
132 | if (memEQ(name, "uniqu", 5)) { | |
95f0a2f1 | 133 | if (SvTYPE(sv) == SVt_PVGV) { |
d015a557 | 134 | if (negated) { |
95f0a2f1 | 135 | GvUNIQUE_off(sv); |
d015a557 | 136 | } else { |
95f0a2f1 | 137 | GvUNIQUE_on(sv); |
d015a557 | 138 | } |
95f0a2f1 SB |
139 | } |
140 | /* Hope this came from toke.c if not a GV. */ | |
0256094b DM |
141 | continue; |
142 | } | |
143 | } | |
144 | } | |
09bef843 SB |
145 | break; |
146 | } | |
147 | /* anything recognized had a 'continue' above */ | |
148 | *retlist++ = attr; | |
149 | nret++; | |
150 | } | |
151 | ||
152 | return nret; | |
153 | } | |
154 | ||
155 | ||
09bef843 SB |
156 | |
157 | /* package attributes; */ | |
158 | ||
159 | XS(XS_attributes_bootstrap) | |
160 | { | |
161 | dXSARGS; | |
09bef843 | 162 | |
592f5969 MS |
163 | if( items > 1 ) |
164 | Perl_croak(aTHX_ "Usage: attributes::bootstrap $module"); | |
b7953727 | 165 | |
5d1ca38b NC |
166 | newXS("attributes::_modify_attrs", XS_attributes__modify_attrs, (char *)file); |
167 | newXSproto("attributes::_guess_stash", XS_attributes__guess_stash, (char *)file, "$"); | |
168 | newXSproto("attributes::_fetch_attrs", XS_attributes__fetch_attrs, (char *)file, "$"); | |
169 | newXSproto("attributes::reftype", XS_attributes_reftype, (char *)file, "$"); | |
09bef843 SB |
170 | |
171 | XSRETURN(0); | |
172 | } | |
173 | ||
174 | XS(XS_attributes__modify_attrs) | |
175 | { | |
176 | dXSARGS; | |
177 | SV *rv, *sv; | |
178 | ||
179 | if (items < 1) { | |
180 | usage: | |
181 | Perl_croak(aTHX_ | |
182 | "Usage: attributes::_modify_attrs $reference, @attributes"); | |
183 | } | |
184 | ||
185 | rv = ST(0); | |
186 | if (!(SvOK(rv) && SvROK(rv))) | |
187 | goto usage; | |
188 | sv = SvRV(rv); | |
189 | if (items > 1) | |
acfe0abc | 190 | XSRETURN(modify_SV_attributes(aTHX_ sv, &ST(0), &ST(1), items-1)); |
09bef843 SB |
191 | |
192 | XSRETURN(0); | |
193 | } | |
194 | ||
195 | XS(XS_attributes__fetch_attrs) | |
196 | { | |
197 | dXSARGS; | |
198 | SV *rv, *sv; | |
199 | cv_flags_t cvflags; | |
200 | ||
201 | if (items != 1) { | |
202 | usage: | |
203 | Perl_croak(aTHX_ | |
204 | "Usage: attributes::_fetch_attrs $reference"); | |
205 | } | |
206 | ||
207 | rv = ST(0); | |
208 | SP -= items; | |
209 | if (!(SvOK(rv) && SvROK(rv))) | |
210 | goto usage; | |
211 | sv = SvRV(rv); | |
212 | ||
213 | switch (SvTYPE(sv)) { | |
214 | case SVt_PVCV: | |
215 | cvflags = CvFLAGS((CV*)sv); | |
216 | if (cvflags & CVf_LOCKED) | |
d7559646 | 217 | XPUSHs(sv_2mortal(newSVpvs("locked"))); |
09bef843 SB |
218 | #ifdef CVf_LVALUE |
219 | if (cvflags & CVf_LVALUE) | |
d7559646 | 220 | XPUSHs(sv_2mortal(newSVpvs("lvalue"))); |
09bef843 SB |
221 | #endif |
222 | if (cvflags & CVf_METHOD) | |
d7559646 | 223 | XPUSHs(sv_2mortal(newSVpvs("method"))); |
7fb37951 | 224 | if (GvUNIQUE(CvGV((CV*)sv))) |
d7559646 | 225 | XPUSHs(sv_2mortal(newSVpvs("unique"))); |
95f0a2f1 SB |
226 | break; |
227 | case SVt_PVGV: | |
228 | if (GvUNIQUE(sv)) | |
d7559646 | 229 | XPUSHs(sv_2mortal(newSVpvs("unique"))); |
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; | |
c72da347 | 242 | dXSTARG; |
09bef843 SB |
243 | |
244 | if (items != 1) { | |
245 | usage: | |
246 | Perl_croak(aTHX_ | |
247 | "Usage: attributes::_guess_stash $reference"); | |
248 | } | |
249 | ||
250 | rv = ST(0); | |
251 | ST(0) = TARG; | |
252 | if (!(SvOK(rv) && SvROK(rv))) | |
253 | goto usage; | |
254 | sv = SvRV(rv); | |
255 | ||
256 | if (SvOBJECT(sv)) | |
26ab6a78 | 257 | sv_setpv(TARG, HvNAME_get(SvSTASH(sv))); |
09bef843 SB |
258 | #if 0 /* this was probably a bad idea */ |
259 | else if (SvPADMY(sv)) | |
260 | sv_setsv(TARG, &PL_sv_no); /* unblessed lexical */ | |
261 | #endif | |
262 | else { | |
0e2d6244 | 263 | const HV *stash = NULL; |
09bef843 SB |
264 | switch (SvTYPE(sv)) { |
265 | case SVt_PVCV: | |
6676db26 | 266 | if (CvGV(sv) && isGV(CvGV(sv)) && GvSTASH(CvGV(sv))) |
09bef843 | 267 | stash = GvSTASH(CvGV(sv)); |
6676db26 | 268 | else if (/* !CvANON(sv) && */ CvSTASH(sv)) |
09bef843 SB |
269 | stash = CvSTASH(sv); |
270 | break; | |
09bef843 | 271 | case SVt_PVGV: |
6676db26 | 272 | if (GvGP(sv) && GvESTASH((GV*)sv)) |
09bef843 SB |
273 | stash = GvESTASH((GV*)sv); |
274 | break; | |
275 | default: | |
276 | break; | |
277 | } | |
278 | if (stash) | |
26ab6a78 | 279 | sv_setpv(TARG, HvNAME_get(stash)); |
09bef843 SB |
280 | } |
281 | ||
09bef843 | 282 | SvSETMAGIC(TARG); |
09bef843 SB |
283 | XSRETURN(1); |
284 | } | |
285 | ||
286 | XS(XS_attributes_reftype) | |
287 | { | |
288 | dXSARGS; | |
289 | SV *rv, *sv; | |
c72da347 | 290 | dXSTARG; |
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; | |
255c29c3 | 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 | ||
d8294a4d NC |
310 | /* |
311 | * Local variables: | |
312 | * c-indentation-style: bsd | |
313 | * c-basic-offset: 4 | |
314 | * indent-tabs-mode: t | |
315 | * End: | |
316 | * | |
317 | * ex: set ts=8 sts=4 sw=4 noet: | |
318 | */ |