1 /* This file is part of the indirect Perl module.
2 * See http://search.cpan.org/dist/indirect/ */
4 #define PERL_NO_GET_CONTEXT
10 # define SvPV_const SvPV
13 #ifndef SvPV_nolen_const
14 # define SvPV_nolen_const SvPV_nolen
18 # define SvPVX_const SvPVX
21 /* ... Hints ............................................................... */
23 STATIC U32 indirect_hash = 0;
25 STATIC IV indirect_hint(pTHX) {
26 #define indirect_hint() indirect_hint(aTHX)
27 SV *id = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
32 return (id && SvOK(id) && SvIOK(id)) ? SvIV(id) : 0;
35 /* ... op -> source position ............................................... */
37 STATIC HV *indirect_map = NULL;
38 STATIC const char *indirect_linestr = NULL;
40 #define OP2STR(O) (sprintf(buf, "%u", PTR2UV(o)))
42 STATIC void indirect_map_store(pTHX_ const OP *o, const char *src, SV *sv) {
43 #define indirect_map_store(O, S, N) indirect_map_store(aTHX_ (O), (S), (N))
45 const char *pl_linestr;
48 /* When lex_inwhat is set, we're in a quotelike environment (qq, qr, but not q)
49 * In this case the linestr has temporarly changed, but the old buffer should
50 * still be alive somewhere. */
52 if (!PL_parser->lex_inwhat) {
53 pl_linestr = SvPVX_const(PL_parser->linestr);
54 if (indirect_linestr != pl_linestr) {
55 hv_clear(indirect_map);
56 indirect_linestr = pl_linestr;
61 SvUPGRADE(val, SVt_PVIV);
62 SvUVX(val) = PTR2UV(src);
65 if (!hv_store(indirect_map, buf, OP2STR(o), val, 0))
69 STATIC const char *indirect_map_fetch(pTHX_ const OP *o, SV ** const name) {
70 #define indirect_map_fetch(O, S) indirect_map_fetch(aTHX_ (O), (S))
74 if (indirect_linestr != SvPVX_const(PL_parser->linestr))
77 val = hv_fetch(indirect_map, buf, OP2STR(o), 0);
84 return INT2PTR(const char *, SvUVX(*val));
87 STATIC void indirect_map_delete(pTHX_ const OP *o) {
88 #define indirect_map_delete(O) indirect_map_delete(aTHX_ (O))
92 hv_delete(indirect_map, buf, OP2STR(o), G_DISCARD);
95 STATIC void indirect_map_clean(pTHX_ const OP *o) {
96 #define indirect_map_clean(O) indirect_map_clean(aTHX_ (O))
97 if (o->op_flags & OPf_KIDS) {
98 const OP *kid = cUNOPo->op_first;
99 for (; kid; kid = kid->op_sibling) {
100 indirect_map_delete(kid);
101 indirect_map_clean(kid);
104 indirect_map_delete(o);
108 STATIC const char *indirect_find(pTHX_ SV *sv, const char *s) {
109 #define indirect_find(N, S) indirect_find(aTHX_ (N), (S))
111 const char *p = NULL, *r = SvPV_const(sv, len);
121 p = strstr(p + 1, r);
127 /* ... ck_const ............................................................ */
129 STATIC OP *(*indirect_old_ck_const)(pTHX_ OP *) = 0;
131 STATIC OP *indirect_ck_const(pTHX_ OP *o) {
132 if (indirect_hint()) {
134 if (SvPOK(sv) && (SvTYPE(sv) >= SVt_PV))
135 indirect_map_store(o, indirect_find(sv, PL_parser->oldbufptr), sv);
138 return CALL_FPTR(indirect_old_ck_const)(aTHX_ o);
141 /* ... ck_rv2sv ............................................................ */
143 STATIC OP *(*indirect_old_ck_rv2sv)(pTHX_ OP *) = 0;
145 STATIC OP *indirect_ck_rv2sv(pTHX_ OP *o) {
146 if (indirect_hint()) {
147 OP *op = cUNOPo->op_first;
148 SV *name = cSVOPx_sv(op);
149 if (SvPOK(name) && (SvTYPE(name) >= SVt_PV)) {
150 SV *sv = sv_2mortal(newSVpvn("$", 1));
152 indirect_map_store(o, indirect_find(sv, PL_parser->oldbufptr), sv);
156 return CALL_FPTR(indirect_old_ck_rv2sv)(aTHX_ o);
159 /* ... ck_padany ........................................................... */
161 STATIC OP *(*indirect_old_ck_padany)(pTHX_ OP *) = 0;
163 STATIC OP *indirect_ck_padany(pTHX_ OP *o) {
164 if (indirect_hint()) {
166 const char *s = PL_parser->oldbufptr, *t = PL_parser->bufptr - 1;
168 while (s < t && isSPACE(*s)) ++s;
169 while (t > s && isSPACE(*t)) --t;
170 sv = sv_2mortal(newSVpvn(s, t - s + 1));
172 indirect_map_store(o, s, sv);
175 return CALL_FPTR(indirect_old_ck_padany)(aTHX_ o);
178 /* ... ck_method ........................................................... */
180 STATIC OP *(*indirect_old_ck_method)(pTHX_ OP *) = 0;
182 STATIC OP *indirect_ck_method(pTHX_ OP *o) {
183 if (indirect_hint()) {
184 OP *op = cUNOPo->op_first;
186 const char *s = indirect_map_fetch(op, &sv);
189 if (!SvPOK(sv) || (SvTYPE(sv) < SVt_PV))
191 sv = sv_mortalcopy(sv);
192 s = indirect_find(sv, PL_parser->oldbufptr);
194 o = CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
195 /* o may now be a method_named */
196 indirect_map_store(o, s, sv);
201 return CALL_FPTR(indirect_old_ck_method)(aTHX_ o);
204 /* ... ck_entersub ......................................................... */
206 STATIC const char indirect_msg[] = "Indirect call of method \"%s\" on object \"%s\"";
208 STATIC OP *(*indirect_old_ck_entersub)(pTHX_ OP *) = 0;
210 STATIC OP *indirect_ck_entersub(pTHX_ OP *o) {
213 IV hint = indirect_hint();
221 if (!op->op_flags & OPf_KIDS)
224 } while (oo->op_type != OP_PUSHMARK);
227 if (om->op_type == OP_METHOD)
228 om = cUNOPx(om)->op_first;
229 else if (om->op_type != OP_METHOD_NAMED)
231 pm = indirect_map_fetch(om, &svm);
232 po = indirect_map_fetch(oo, &svo);
233 if (pm && po && pm < po) {
234 const char *psvm = SvPV_nolen_const(svm), *psvo = SvPV_nolen_const(svo);
236 croak(indirect_msg, psvm, psvo);
238 warn(indirect_msg, psvm, psvo);
241 indirect_map_clean(o);
244 return CALL_FPTR(indirect_old_ck_entersub)(aTHX_ o);
247 STATIC U32 indirect_initialized = 0;
249 /* --- XS ------------------------------------------------------------------ */
251 MODULE = indirect PACKAGE = indirect
257 if (!indirect_initialized++) {
258 PERL_HASH(indirect_hash, "indirect", 8);
259 indirect_map = newHV();
260 indirect_old_ck_const = PL_check[OP_CONST];
261 PL_check[OP_CONST] = MEMBER_TO_FPTR(indirect_ck_const);
262 indirect_old_ck_rv2sv = PL_check[OP_RV2SV];
263 PL_check[OP_RV2SV] = MEMBER_TO_FPTR(indirect_ck_rv2sv);
264 indirect_old_ck_padany = PL_check[OP_PADANY];
265 PL_check[OP_PADANY] = MEMBER_TO_FPTR(indirect_ck_padany);
266 indirect_old_ck_method = PL_check[OP_METHOD];
267 PL_check[OP_METHOD] = MEMBER_TO_FPTR(indirect_ck_method);
268 indirect_old_ck_entersub = PL_check[OP_ENTERSUB];
269 PL_check[OP_ENTERSUB] = MEMBER_TO_FPTR(indirect_ck_entersub);