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1 | /* Copyright (C) 2004, 2008 Matthijs van Duin. All rights reserved. |
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2 | * Copyright (C) 2014, cPanel Inc. All rights reserved. |
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3 | * This program is free software; you can redistribute it and/or modify |
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4 | * it under the same terms as Perl itself. |
5 | */ |
6 | |
7 | #include "EXTERN.h" |
8 | #include "perl.h" |
9 | #include "XSUB.h" |
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10 | #include "ppport.h" |
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11 | |
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12 | static MGVTBL subname_vtbl; |
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13 | |
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14 | #ifndef PERL_MAGIC_ext |
15 | # define PERL_MAGIC_ext '~' |
16 | #endif |
17 | |
18 | #ifndef SvMAGIC_set |
19 | #define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val)) |
20 | #endif |
21 | |
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22 | #ifndef Newxz |
23 | #define Newxz(ptr, num, type) Newz(0, ptr, num, type) |
24 | #endif |
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25 | |
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26 | MODULE = Sub::Name PACKAGE = Sub::Name |
27 | |
28 | PROTOTYPES: DISABLE |
29 | |
30 | void |
31 | subname(name, sub) |
32 | char *name |
33 | SV *sub |
34 | PREINIT: |
35 | CV *cv = NULL; |
36 | GV *gv; |
37 | HV *stash = CopSTASH(PL_curcop); |
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38 | char *s, *end = NULL; |
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39 | MAGIC *mg; |
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40 | PPCODE: |
41 | if (!SvROK(sub) && SvGMAGICAL(sub)) |
42 | mg_get(sub); |
43 | if (SvROK(sub)) |
44 | cv = (CV *) SvRV(sub); |
45 | else if (SvTYPE(sub) == SVt_PVGV) |
46 | cv = GvCVu(sub); |
47 | else if (!SvOK(sub)) |
48 | croak(PL_no_usym, "a subroutine"); |
49 | else if (PL_op->op_private & HINT_STRICT_REFS) |
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50 | croak("Can't use string (\"%.32s\") as %s ref while \"strict refs\" in use", |
51 | SvPV_nolen(sub), "a subroutine"); |
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52 | else if ((gv = gv_fetchpv(SvPV_nolen(sub), FALSE, SVt_PVCV))) |
53 | cv = GvCVu(gv); |
54 | if (!cv) |
55 | croak("Undefined subroutine %s", SvPV_nolen(sub)); |
56 | if (SvTYPE(cv) != SVt_PVCV && SvTYPE(cv) != SVt_PVFM) |
57 | croak("Not a subroutine reference"); |
58 | for (s = name; *s++; ) { |
59 | if (*s == ':' && s[-1] == ':') |
60 | end = ++s; |
61 | else if (*s && s[-1] == '\'') |
62 | end = s; |
63 | } |
64 | s--; |
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65 | if (end) { |
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66 | char *namepv = savepvn(name, end - name); |
67 | stash = GvHV(gv_fetchpv(namepv, TRUE, SVt_PVHV)); |
68 | Safefree(namepv); |
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69 | name = end; |
70 | } |
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71 | |
72 | /* under debugger, provide information about sub location */ |
73 | if (PL_DBsub && CvGV(cv)) { |
74 | HV *hv = GvHV(PL_DBsub); |
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75 | SV** old_data; |
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76 | |
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77 | char* new_pkg = HvNAME(stash); |
78 | |
79 | char* old_name = GvNAME( CvGV(cv) ); |
80 | char* old_pkg = HvNAME( GvSTASH(CvGV(cv)) ); |
81 | |
82 | int old_len = strlen(old_name) + strlen(old_pkg); |
83 | int new_len = strlen(name) + strlen(new_pkg); |
84 | |
85 | char* full_name; |
86 | Newxz(full_name, (old_len > new_len ? old_len : new_len) + 3, char); |
87 | |
88 | strcat(full_name, old_pkg); |
89 | strcat(full_name, "::"); |
90 | strcat(full_name, old_name); |
91 | |
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92 | old_data = hv_fetch(hv, full_name, strlen(full_name), 0); |
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93 | |
94 | if (old_data) { |
95 | strcpy(full_name, new_pkg); |
96 | strcat(full_name, "::"); |
97 | strcat(full_name, name); |
98 | |
99 | SvREFCNT_inc(*old_data); |
100 | if (!hv_store(hv, full_name, strlen(full_name), *old_data, 0)) |
101 | SvREFCNT_dec(*old_data); |
102 | } |
103 | Safefree(full_name); |
104 | } |
105 | |
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106 | gv = (GV *) newSV(0); |
107 | gv_init(gv, stash, name, s - name, TRUE); |
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108 | |
109 | mg = SvMAGIC(cv); |
110 | while (mg && mg->mg_virtual != &subname_vtbl) |
111 | mg = mg->mg_moremagic; |
112 | if (!mg) { |
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113 | Newxz(mg, 1, MAGIC); |
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114 | mg->mg_moremagic = SvMAGIC(cv); |
115 | mg->mg_type = PERL_MAGIC_ext; |
116 | mg->mg_virtual = &subname_vtbl; |
117 | SvMAGIC_set(cv, mg); |
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118 | } |
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119 | if (mg->mg_flags & MGf_REFCOUNTED) |
120 | SvREFCNT_dec(mg->mg_obj); |
121 | mg->mg_flags |= MGf_REFCOUNTED; |
122 | mg->mg_obj = (SV *) gv; |
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123 | SvRMAGICAL_on(cv); |
124 | CvANON_off(cv); |
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125 | #ifndef CvGV_set |
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126 | CvGV(cv) = gv; |
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127 | #else |
128 | CvGV_set(cv, gv); |
129 | #endif |
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130 | PUSHs(sub); |