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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 | #define NEED_sv_2pv_flags |
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11 | #define NEED_newSVpvn_flags |
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12 | #define NEED_gv_fetchpvn_flags |
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13 | #include "ppport.h" |
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14 | |
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15 | static MGVTBL subname_vtbl; |
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16 | |
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17 | #ifndef PERL_MAGIC_ext |
18 | # define PERL_MAGIC_ext '~' |
19 | #endif |
20 | |
21 | #ifndef SvMAGIC_set |
22 | #define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val)) |
23 | #endif |
24 | |
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25 | #ifndef Newxz |
26 | #define Newxz(ptr, num, type) Newz(0, ptr, num, type) |
27 | #endif |
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28 | |
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29 | #ifndef HvNAMELEN_get |
30 | #define HvNAMELEN_get(stash) strlen(HvNAME(stash)) |
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31 | #endif |
32 | |
33 | #ifndef HvNAMEUTF8 |
34 | #define HvNAMEUTF8(stash) 0 |
35 | #endif |
36 | |
37 | #ifndef GvNAMEUTF8 |
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38 | #ifdef GvNAME_HEK |
39 | #define GvNAMEUTF8(stash) HEK_UTF8(GvNAME_HEK(gv)) |
40 | #else |
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41 | #define GvNAMEUTF8(stash) 0 |
42 | #endif |
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43 | #endif |
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44 | |
45 | #ifndef SV_CATUTF8 |
46 | #define SV_CATUTF8 0 |
47 | #endif |
48 | |
49 | #ifndef SV_CATBYTES |
50 | #define SV_CATBYTES 0 |
51 | #endif |
52 | |
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53 | MODULE = Sub::Name PACKAGE = Sub::Name |
54 | |
55 | PROTOTYPES: DISABLE |
56 | |
57 | void |
58 | subname(name, sub) |
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59 | SV *name |
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60 | SV *sub |
61 | PREINIT: |
62 | CV *cv = NULL; |
63 | GV *gv; |
64 | HV *stash = CopSTASH(PL_curcop); |
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65 | const char *s, *end = NULL, *begin = NULL; |
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66 | MAGIC *mg; |
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67 | STRLEN namelen; |
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68 | const char* nameptr = SvPV(name, namelen); |
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69 | int utf8flag = SvUTF8(name); |
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70 | int seen_quote = 0, need_subst = 0; |
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71 | PPCODE: |
72 | if (!SvROK(sub) && SvGMAGICAL(sub)) |
73 | mg_get(sub); |
74 | if (SvROK(sub)) |
75 | cv = (CV *) SvRV(sub); |
76 | else if (SvTYPE(sub) == SVt_PVGV) |
77 | cv = GvCVu(sub); |
78 | else if (!SvOK(sub)) |
79 | croak(PL_no_usym, "a subroutine"); |
80 | else if (PL_op->op_private & HINT_STRICT_REFS) |
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81 | croak("Can't use string (\"%.32s\") as %s ref while \"strict refs\" in use", |
82 | SvPV_nolen(sub), "a subroutine"); |
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83 | else if ((gv = gv_fetchsv(sub, FALSE, SVt_PVCV))) |
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84 | cv = GvCVu(gv); |
85 | if (!cv) |
86 | croak("Undefined subroutine %s", SvPV_nolen(sub)); |
87 | if (SvTYPE(cv) != SVt_PVCV && SvTYPE(cv) != SVt_PVFM) |
88 | croak("Not a subroutine reference"); |
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89 | |
90 | for (s = nameptr; s <= nameptr + namelen; s++) { |
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91 | if (s > nameptr && *s == ':' && s[-1] == ':') { |
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92 | end = s - 1; |
93 | begin = ++s; |
94 | if (seen_quote) |
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95 | need_subst++; |
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96 | } |
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97 | else if (s > nameptr && *s != '\0' && s[-1] == '\'') { |
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98 | end = s - 1; |
99 | begin = s; |
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100 | if (seen_quote++) |
101 | need_subst++; |
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102 | } |
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103 | } |
104 | s--; |
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105 | if (end) { |
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106 | SV* tmp; |
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107 | if (need_subst) { |
108 | STRLEN length = end - nameptr + seen_quote - (*end == '\'' ? 1 : 0); |
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109 | char* left; |
110 | int i, j; |
111 | tmp = newSV(length); |
112 | left = SvPVX(tmp); |
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113 | for (i = 0, j = 0; j < end - nameptr; ++i, ++j) { |
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114 | if (nameptr[j] == '\'') { |
115 | left[i] = ':'; |
116 | left[++i] = ':'; |
117 | } |
118 | else { |
119 | left[i] = nameptr[j]; |
120 | } |
121 | } |
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122 | stash = gv_stashpvn(left, length, GV_ADD | utf8flag); |
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123 | SvREFCNT_dec(tmp); |
124 | } |
125 | else |
126 | stash = gv_stashpvn(nameptr, end - nameptr, GV_ADD | utf8flag); |
127 | nameptr = begin; |
128 | namelen -= begin - nameptr; |
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129 | } |
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130 | |
131 | /* under debugger, provide information about sub location */ |
132 | if (PL_DBsub && CvGV(cv)) { |
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133 | HV* DBsub = GvHV(PL_DBsub); |
134 | HE* old_data; |
135 | |
136 | GV* oldgv = CvGV(cv); |
137 | HV* oldhv = GvSTASH(oldgv); |
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138 | SV* old_full_name = newSVpvn_flags(HvNAME(oldhv), HvNAMELEN_get(oldhv), HvNAMEUTF8(oldhv) ? SVf_UTF8 : 0); |
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139 | sv_catpvn(old_full_name, "::", 2); |
140 | sv_catpvn_flags(old_full_name, GvNAME(oldgv), GvNAMELEN(oldgv), GvNAMEUTF8(oldgv) ? SV_CATUTF8 : SV_CATBYTES); |
141 | |
142 | old_data = hv_fetch_ent(DBsub, old_full_name, 0, 0); |
143 | |
144 | SvREFCNT_dec(old_full_name); |
145 | |
146 | if (old_data && HeVAL(old_data)) { |
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147 | SV* new_full_name = newSVpvn_flags(HvNAME(stash), HvNAMELEN_get(stash), HvNAMEUTF8(stash) ? SVf_UTF8 : 0); |
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148 | sv_catpvn(new_full_name, "::", 2); |
149 | sv_catpvn_flags(new_full_name, nameptr, s - nameptr, utf8flag ? SV_CATUTF8 : SV_CATBYTES); |
150 | SvREFCNT_inc(HeVAL(old_data)); |
151 | if (hv_store_ent(DBsub, new_full_name, HeVAL(old_data), 0) != NULL) |
152 | SvREFCNT_inc(HeVAL(old_data)); |
153 | SvREFCNT_dec(new_full_name); |
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154 | } |
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155 | } |
156 | |
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157 | gv = (GV *) newSV(0); |
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158 | gv_init_pvn(gv, stash, nameptr, s - nameptr, GV_ADDMULTI | utf8flag); |
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159 | |
160 | mg = SvMAGIC(cv); |
161 | while (mg && mg->mg_virtual != &subname_vtbl) |
162 | mg = mg->mg_moremagic; |
163 | if (!mg) { |
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164 | Newxz(mg, 1, MAGIC); |
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165 | mg->mg_moremagic = SvMAGIC(cv); |
166 | mg->mg_type = PERL_MAGIC_ext; |
167 | mg->mg_virtual = &subname_vtbl; |
168 | SvMAGIC_set(cv, mg); |
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169 | } |
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170 | if (mg->mg_flags & MGf_REFCOUNTED) |
171 | SvREFCNT_dec(mg->mg_obj); |
172 | mg->mg_flags |= MGf_REFCOUNTED; |
173 | mg->mg_obj = (SV *) gv; |
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174 | SvRMAGICAL_on(cv); |
175 | CvANON_off(cv); |
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176 | #ifndef CvGV_set |
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177 | CvGV(cv) = gv; |
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178 | #else |
179 | CvGV_set(cv, gv); |
180 | #endif |
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181 | PUSHs(sub); |