3 * Copyright (c) 1991-2000, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
12 #define dARGS struct perl_thread *thr;
16 #endif /* USE_THREADS */
18 #define PP(s) OP * Perl_##s(pTHX)
22 Stack pointer. This is usually handled by C<xsubpp>. See C<dSP> and
26 Stack marker variable for the XSUB. See C<dMARK>.
28 =for apidoc Ams||PUSHMARK
29 Opening bracket for arguments on a callback. See C<PUTBACK> and
33 Declares a local copy of perl's stack pointer for the XSUB, available via
34 the C<SP> macro. See C<SP>.
36 =for apidoc Ams||dMARK
37 Declare a stack marker variable, C<mark>, for the XSUB. See C<MARK> and
40 =for apidoc Ams||dORIGMARK
41 Saves the original stack mark for the XSUB. See C<ORIGMARK>.
43 =for apidoc AmU||ORIGMARK
44 The original stack mark for the XSUB. See C<dORIGMARK>.
46 =for apidoc Ams||SPAGAIN
47 Refetch the stack pointer. Used after a callback. See L<perlcall>.
56 #define PUSHMARK(p) if (++PL_markstack_ptr == PL_markstack_max) \
58 *PL_markstack_ptr = (p) - PL_stack_base
60 #define TOPMARK (*PL_markstack_ptr)
61 #define POPMARK (*PL_markstack_ptr--)
63 #define djSP register SV **sp = PL_stack_sp
64 #define dSP dTHR; djSP
65 #define dMARK register SV **mark = PL_stack_base + POPMARK
66 #define dORIGMARK I32 origmark = mark - PL_stack_base
67 #define SETORIGMARK origmark = mark - PL_stack_base
68 #define ORIGMARK (PL_stack_base + origmark)
70 #define SPAGAIN sp = PL_stack_sp
71 #define MSPAGAIN sp = PL_stack_sp; mark = ORIGMARK
73 #define GETTARGETSTACKED targ = (PL_op->op_flags & OPf_STACKED ? POPs : PAD_SV(PL_op->op_targ))
74 #define dTARGETSTACKED SV * GETTARGETSTACKED
76 #define GETTARGET targ = PAD_SV(PL_op->op_targ)
77 #define dTARGET SV * GETTARGET
79 #define GETATARGET targ = (PL_op->op_flags & OPf_STACKED ? sp[-1] : PAD_SV(PL_op->op_targ))
80 #define dATARGET SV * GETATARGET
82 #define dTARG SV *targ
84 #define NORMAL PL_op->op_next
85 #define DIE return Perl_die
88 =for apidoc Ams||PUTBACK
89 Closing bracket for XSUB arguments. This is usually handled by C<xsubpp>.
90 See C<PUSHMARK> and L<perlcall> for other uses.
92 =for apidoc Amn|SV*|POPs
93 Pops an SV off the stack.
95 =for apidoc Amn|char*|POPp
96 Pops a string off the stack.
98 =for apidoc Amn|NV|POPn
99 Pops a double off the stack.
101 =for apidoc Amn|IV|POPi
102 Pops an integer off the stack.
104 =for apidoc Amn|long|POPl
105 Pops a long off the stack.
110 #define PUTBACK PL_stack_sp = sp
111 #define RETURN return PUTBACK, NORMAL
112 #define RETURNOP(o) return PUTBACK, o
113 #define RETURNX(x) return x, PUTBACK, NORMAL
116 #define POPp (SvPVx(POPs, PL_na)) /* deprecated */
117 #define POPpx (SvPVx(POPs, n_a))
118 #define POPn (SvNVx(POPs))
119 #define POPi ((IV)SvIVx(POPs))
120 #define POPu ((UV)SvUVx(POPs))
121 #define POPl ((long)SvIVx(POPs))
122 #define POPul ((unsigned long)SvIVx(POPs))
124 #define POPq ((Quad_t)SvIVx(POPs))
125 #define POPuq ((Uquad_t)SvUVx(POPs))
129 #define TOPp (SvPV(TOPs, PL_na)) /* deprecated */
130 #define TOPpx (SvPV(TOPs, n_a))
131 #define TOPn (SvNV(TOPs))
132 #define TOPi ((IV)SvIV(TOPs))
133 #define TOPu ((UV)SvUV(TOPs))
134 #define TOPl ((long)SvIV(TOPs))
135 #define TOPul ((unsigned long)SvUV(TOPs))
137 #define TOPq ((Quad_t)SvIV(TOPs))
138 #define TOPuq ((Uquad_t)SvUV(TOPs))
141 /* Go to some pains in the rare event that we must extend the stack. */
144 =for apidoc Am|void|EXTEND|SP|int nitems
145 Used to extend the argument stack for an XSUB's return values. Once
146 used, guarantees that there is room for at least C<nitems> to be pushed
149 =for apidoc Am|void|PUSHs|SV* sv
150 Push an SV onto the stack. The stack must have room for this element.
151 Does not handle 'set' magic. See C<XPUSHs>.
153 =for apidoc Am|void|PUSHp|char* str|STRLEN len
154 Push a string onto the stack. The stack must have room for this element.
155 The C<len> indicates the length of the string. Handles 'set' magic. See
158 =for apidoc Am|void|PUSHn|NV nv
159 Push a double onto the stack. The stack must have room for this element.
160 Handles 'set' magic. See C<XPUSHn>.
162 =for apidoc Am|void|PUSHi|IV iv
163 Push an integer onto the stack. The stack must have room for this element.
164 Handles 'set' magic. See C<XPUSHi>.
166 =for apidoc Am|void|PUSHu|UV uv
167 Push an unsigned integer onto the stack. The stack must have room for this
168 element. See C<XPUSHu>.
170 =for apidoc Am|void|XPUSHs|SV* sv
171 Push an SV onto the stack, extending the stack if necessary. Does not
172 handle 'set' magic. See C<PUSHs>.
174 =for apidoc Am|void|XPUSHp|char* str|STRLEN len
175 Push a string onto the stack, extending the stack if necessary. The C<len>
176 indicates the length of the string. Handles 'set' magic. See
179 =for apidoc Am|void|XPUSHn|NV nv
180 Push a double onto the stack, extending the stack if necessary. Handles
181 'set' magic. See C<PUSHn>.
183 =for apidoc Am|void|XPUSHi|IV iv
184 Push an integer onto the stack, extending the stack if necessary. Handles
185 'set' magic. See C<PUSHi>.
187 =for apidoc Am|void|XPUSHu|UV uv
188 Push an unsigned integer onto the stack, extending the stack if necessary.
194 #define EXTEND(p,n) STMT_START { if (PL_stack_max - p < (n)) { \
195 sp = stack_grow(sp,p, (int) (n)); \
198 /* Same thing, but update mark register too. */
199 #define MEXTEND(p,n) STMT_START {if (PL_stack_max - p < (n)) { \
200 int markoff = mark - PL_stack_base; \
201 sp = stack_grow(sp,p,(int) (n)); \
202 mark = PL_stack_base + markoff; \
205 #define PUSHs(s) (*++sp = (s))
206 #define PUSHTARG STMT_START { SvSETMAGIC(TARG); PUSHs(TARG); } STMT_END
207 #define PUSHp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); PUSHTARG; } STMT_END
208 #define PUSHn(n) STMT_START { sv_setnv(TARG, (NV)(n)); PUSHTARG; } STMT_END
209 #define PUSHi(i) STMT_START { sv_setiv(TARG, (IV)(i)); PUSHTARG; } STMT_END
210 #define PUSHu(u) STMT_START { sv_setuv(TARG, (UV)(u)); PUSHTARG; } STMT_END
212 #define XPUSHs(s) STMT_START { EXTEND(sp,1); (*++sp = (s)); } STMT_END
213 #define XPUSHTARG STMT_START { SvSETMAGIC(TARG); XPUSHs(TARG); } STMT_END
214 #define XPUSHp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); XPUSHTARG; } STMT_END
215 #define XPUSHn(n) STMT_START { sv_setnv(TARG, (NV)(n)); XPUSHTARG; } STMT_END
216 #define XPUSHi(i) STMT_START { sv_setiv(TARG, (IV)(i)); XPUSHTARG; } STMT_END
217 #define XPUSHu(u) STMT_START { sv_setuv(TARG, (UV)(u)); XPUSHTARG; } STMT_END
218 #define XPUSHundef STMT_START { SvOK_off(TARG); XPUSHs(TARG); } STMT_END
220 #define SETs(s) (*sp = s)
221 #define SETTARG STMT_START { SvSETMAGIC(TARG); SETs(TARG); } STMT_END
222 #define SETp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); SETTARG; } STMT_END
223 #define SETn(n) STMT_START { sv_setnv(TARG, (NV)(n)); SETTARG; } STMT_END
224 #define SETi(i) STMT_START { sv_setiv(TARG, (IV)(i)); SETTARG; } STMT_END
225 #define SETu(u) STMT_START { sv_setuv(TARG, (UV)(u)); SETTARG; } STMT_END
227 #define dTOPss SV *sv = TOPs
228 #define dPOPss SV *sv = POPs
229 #define dTOPnv NV value = TOPn
230 #define dPOPnv NV value = POPn
231 #define dTOPiv IV value = TOPi
232 #define dPOPiv IV value = POPi
233 #define dTOPuv UV value = TOPu
234 #define dPOPuv UV value = POPu
236 #define dTOPqv Quad_t value = TOPu
237 #define dPOPqv Quad_t value = POPu
238 #define dTOPuqv Uquad_t value = TOPuq
239 #define dPOPuqv Uquad_t value = POPuq
242 #define dPOPXssrl(X) SV *right = POPs; SV *left = CAT2(X,s)
243 #define dPOPXnnrl(X) NV right = POPn; NV left = CAT2(X,n)
244 #define dPOPXiirl(X) IV right = POPi; IV left = CAT2(X,i)
246 #define USE_LEFT(sv) \
247 (SvOK(sv) || SvGMAGICAL(sv) || !(PL_op->op_flags & OPf_STACKED))
248 #define dPOPXnnrl_ul(X) \
250 SV *leftsv = CAT2(X,s); \
251 NV left = USE_LEFT(leftsv) ? SvNV(leftsv) : 0.0
252 #define dPOPXiirl_ul(X) \
254 SV *leftsv = CAT2(X,s); \
255 IV left = USE_LEFT(leftsv) ? SvIV(leftsv) : 0
257 #define dPOPPOPssrl dPOPXssrl(POP)
258 #define dPOPPOPnnrl dPOPXnnrl(POP)
259 #define dPOPPOPnnrl_ul dPOPXnnrl_ul(POP)
260 #define dPOPPOPiirl dPOPXiirl(POP)
261 #define dPOPPOPiirl_ul dPOPXiirl_ul(POP)
263 #define dPOPTOPssrl dPOPXssrl(TOP)
264 #define dPOPTOPnnrl dPOPXnnrl(TOP)
265 #define dPOPTOPnnrl_ul dPOPXnnrl_ul(TOP)
266 #define dPOPTOPiirl dPOPXiirl(TOP)
267 #define dPOPTOPiirl_ul dPOPXiirl_ul(TOP)
269 #define RETPUSHYES RETURNX(PUSHs(&PL_sv_yes))
270 #define RETPUSHNO RETURNX(PUSHs(&PL_sv_no))
271 #define RETPUSHUNDEF RETURNX(PUSHs(&PL_sv_undef))
273 #define RETSETYES RETURNX(SETs(&PL_sv_yes))
274 #define RETSETNO RETURNX(SETs(&PL_sv_no))
275 #define RETSETUNDEF RETURNX(SETs(&PL_sv_undef))
277 #define ARGTARG PL_op->op_targ
279 /* See OPpTARGET_MY: */
280 #define MAXARG (PL_op->op_private & 15)
282 #define SWITCHSTACK(f,t) \
284 AvFILLp(f) = sp - PL_stack_base; \
285 PL_stack_base = AvARRAY(t); \
286 PL_stack_max = PL_stack_base + AvMAX(t); \
287 sp = PL_stack_sp = PL_stack_base + AvFILLp(t); \
291 #define EXTEND_MORTAL(n) \
293 if (PL_tmps_ix + (n) >= PL_tmps_max) \
297 #define AMGf_noright 1
298 #define AMGf_noleft 2
299 #define AMGf_assign 4
302 #define tryAMAGICbinW(meth,assign,set) STMT_START { \
303 if (PL_amagic_generation) { \
305 SV* right= *(sp); SV* left= *(sp-1);\
306 if ((SvAMAGIC(left)||SvAMAGIC(right))&&\
307 (tmpsv=amagic_call(left, \
310 (assign)? AMGf_assign: 0))) {\
312 (void)POPs; set(tmpsv); RETURN; } \
316 #define tryAMAGICbin(meth,assign) tryAMAGICbinW(meth,assign,SETsv)
317 #define tryAMAGICbinSET(meth,assign) tryAMAGICbinW(meth,assign,SETs)
319 #define AMG_CALLun(sv,meth) amagic_call(sv,&PL_sv_undef, \
320 CAT2(meth,_amg),AMGf_noright | AMGf_unary)
321 #define AMG_CALLbinL(left,right,meth) \
322 amagic_call(left,right,CAT2(meth,_amg),AMGf_noright)
324 #define tryAMAGICunW(meth,set,shift,ret) STMT_START { \
325 if (PL_amagic_generation) { \
327 SV* arg= sp[shift]; \
329 if ((SvAMAGIC(arg))&&\
330 (tmpsv=AMG_CALLun(arg,meth))) {\
331 SPAGAIN; if (shift) sp += shift; \
336 #define FORCE_SETs(sv) STMT_START { sv_setsv(TARG, (sv)); SETTARG; } STMT_END
338 #define tryAMAGICun(meth) tryAMAGICunW(meth,SETsvUN,0,RETURN)
339 #define tryAMAGICunSET(meth) tryAMAGICunW(meth,SETs,0,RETURN)
340 #define tryAMAGICunTARGET(meth, shift) \
341 { dSP; sp--; /* get TARGET from below PL_stack_sp */ \
343 { dSP; tryAMAGICunW(meth,FORCE_SETs,shift,RETURN);}}}
345 #define setAGAIN(ref) sv = arg = ref; \
347 Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); \
350 #define tryAMAGICunDEREF(meth) tryAMAGICunW(meth,setAGAIN,0,(void)0)
352 #define opASSIGN (PL_op->op_flags & OPf_STACKED)
353 #define SETsv(sv) STMT_START { \
354 if (opASSIGN || (SvFLAGS(TARG) & SVs_PADMY)) \
355 { sv_setsv(TARG, (sv)); SETTARG; } \
356 else SETs(sv); } STMT_END
358 #define SETsvUN(sv) STMT_START { \
359 if (SvFLAGS(TARG) & SVs_PADMY) \
360 { sv_setsv(TARG, (sv)); SETTARG; } \
361 else SETs(sv); } STMT_END
363 /* newSVsv does not behave as advertised, so we copy missing
364 * information by hand */
366 /* SV* ref causes confusion with the member variable
367 changed SV* ref to SV* tmpRef */
368 #define RvDEEPCP(rv) STMT_START { SV* tmpRef=SvRV(rv); \
369 if (SvREFCNT(tmpRef)>1) { \
370 SvREFCNT_dec(tmpRef); \
371 SvRV(rv)=AMG_CALLun(rv,copy); \