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16c23894 |
1 | /* $Id: Name.xs,v 1.5 2004/08/18 13:21:44 xmath Exp $ |
2 | * Copyright (C) 2004 Matthijs van Duin. All rights reserved. |
3 | * This program is free software; you can redistribute it and/or modify |
4 | * it under the same terms as Perl itself. |
5 | */ |
6 | |
7 | #include "EXTERN.h" |
8 | #include "perl.h" |
9 | #include "XSUB.h" |
10 | |
bbd01306 |
11 | static MGVTBL subname_vtbl; |
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12 | |
13 | MODULE = Sub::Name PACKAGE = Sub::Name |
14 | |
15 | PROTOTYPES: DISABLE |
16 | |
17 | void |
18 | subname(name, sub) |
19 | char *name |
20 | SV *sub |
21 | PREINIT: |
22 | CV *cv = NULL; |
23 | GV *gv; |
24 | HV *stash = CopSTASH(PL_curcop); |
25 | char *s, *end = NULL, saved; |
26 | PPCODE: |
27 | if (!SvROK(sub) && SvGMAGICAL(sub)) |
28 | mg_get(sub); |
29 | if (SvROK(sub)) |
30 | cv = (CV *) SvRV(sub); |
31 | else if (SvTYPE(sub) == SVt_PVGV) |
32 | cv = GvCVu(sub); |
33 | else if (!SvOK(sub)) |
34 | croak(PL_no_usym, "a subroutine"); |
35 | else if (PL_op->op_private & HINT_STRICT_REFS) |
36 | croak(PL_no_symref, SvPV_nolen(sub), "a subroutine"); |
37 | else if ((gv = gv_fetchpv(SvPV_nolen(sub), FALSE, SVt_PVCV))) |
38 | cv = GvCVu(gv); |
39 | if (!cv) |
40 | croak("Undefined subroutine %s", SvPV_nolen(sub)); |
41 | if (SvTYPE(cv) != SVt_PVCV && SvTYPE(cv) != SVt_PVFM) |
42 | croak("Not a subroutine reference"); |
43 | for (s = name; *s++; ) { |
44 | if (*s == ':' && s[-1] == ':') |
45 | end = ++s; |
46 | else if (*s && s[-1] == '\'') |
47 | end = s; |
48 | } |
49 | s--; |
50 | if (end) { |
51 | saved = *end; |
52 | *end = 0; |
53 | stash = GvHV(gv_fetchpv(name, TRUE, SVt_PVHV)); |
54 | *end = saved; |
55 | name = end; |
56 | } |
57 | gv = (GV *) newSV(0); |
58 | gv_init(gv, stash, name, s - name, TRUE); |
bbd01306 |
59 | #ifndef USE_5005THREADS |
60 | if (CvPADLIST(cv)) { |
61 | /* cheap way to refcount the gv */ |
62 | av_store((AV *) AvARRAY(CvPADLIST(cv))[0], 0, (SV *) gv); |
63 | } |
64 | #endif |
65 | else { |
66 | /* expensive way to refcount the gv */ |
67 | MAGIC *mg = SvMAGIC(cv); |
68 | while (mg && mg->mg_virtual != &subname_vtbl) |
69 | mg = mg->mg_moremagic; |
70 | if (!mg) |
71 | mg = sv_magicext((SV *) cv, NULL, PERL_MAGIC_ext, |
72 | &subname_vtbl, NULL, 0); |
73 | if (mg->mg_flags & MGf_REFCOUNTED) |
74 | SvREFCNT_dec(mg->mg_obj); |
75 | mg->mg_flags |= MGf_REFCOUNTED; |
76 | mg->mg_obj = (SV *) gv; |
77 | } |
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78 | CvGV(cv) = gv; |
79 | PUSHs(sub); |