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>.
38 Declare Just C<SP>. This is actually identical to C<dSP>, and declares
39 a local copy of perl's stack pointer, available via the C<SP> macro.
40 See C<SP>. (Available for backward source code compatibility with the
41 old (Perl 5.005) thread model.)
43 =for apidoc Ams||dMARK
44 Declare a stack marker variable, C<mark>, for the XSUB. See C<MARK> and
47 =for apidoc Ams||dORIGMARK
48 Saves the original stack mark for the XSUB. See C<ORIGMARK>.
50 =for apidoc AmU||ORIGMARK
51 The original stack mark for the XSUB. See C<dORIGMARK>.
53 =for apidoc Ams||SPAGAIN
54 Refetch the stack pointer. Used after a callback. See L<perlcall>.
62 #define PUSHMARK(p) if (++PL_markstack_ptr == PL_markstack_max) \
64 *PL_markstack_ptr = (p) - PL_stack_base
66 #define TOPMARK (*PL_markstack_ptr)
67 #define POPMARK (*PL_markstack_ptr--)
69 #define djSP register SV **sp = PL_stack_sp
71 #define dMARK register SV **mark = PL_stack_base + POPMARK
72 #define dORIGMARK I32 origmark = mark - PL_stack_base
73 #define SETORIGMARK origmark = mark - PL_stack_base
74 #define ORIGMARK (PL_stack_base + origmark)
76 #define SPAGAIN sp = PL_stack_sp
77 #define MSPAGAIN sp = PL_stack_sp; mark = ORIGMARK
79 #define GETTARGETSTACKED targ = (PL_op->op_flags & OPf_STACKED ? POPs : PAD_SV(PL_op->op_targ))
80 #define dTARGETSTACKED SV * GETTARGETSTACKED
82 #define GETTARGET targ = PAD_SV(PL_op->op_targ)
83 #define dTARGET SV * GETTARGET
85 #define GETATARGET targ = (PL_op->op_flags & OPf_STACKED ? sp[-1] : PAD_SV(PL_op->op_targ))
86 #define dATARGET SV * GETATARGET
88 #define dTARG SV *targ
90 #define NORMAL PL_op->op_next
91 #define DIE return Perl_die
94 =for apidoc Ams||PUTBACK
95 Closing bracket for XSUB arguments. This is usually handled by C<xsubpp>.
96 See C<PUSHMARK> and L<perlcall> for other uses.
98 =for apidoc Amn|SV*|POPs
99 Pops an SV off the stack.
101 =for apidoc Amn|char*|POPp
102 Pops a string off the stack.
104 =for apidoc Amn|NV|POPn
105 Pops a double off the stack.
107 =for apidoc Amn|IV|POPi
108 Pops an integer off the stack.
110 =for apidoc Amn|long|POPl
111 Pops a long off the stack.
116 #define PUTBACK PL_stack_sp = sp
117 #define RETURN return PUTBACK, NORMAL
118 #define RETURNOP(o) return PUTBACK, o
119 #define RETURNX(x) return x, PUTBACK, NORMAL
122 #define POPp (SvPVx(POPs, PL_na)) /* deprecated */
123 #define POPpx (SvPVx(POPs, n_a))
124 #define POPn (SvNVx(POPs))
125 #define POPi ((IV)SvIVx(POPs))
126 #define POPu ((UV)SvUVx(POPs))
127 #define POPl ((long)SvIVx(POPs))
128 #define POPul ((unsigned long)SvIVx(POPs))
130 #define POPq ((Quad_t)SvIVx(POPs))
131 #define POPuq ((Uquad_t)SvUVx(POPs))
135 #define TOPm1s (*(sp-1))
136 #define TOPp (SvPV(TOPs, PL_na)) /* deprecated */
137 #define TOPpx (SvPV(TOPs, n_a))
138 #define TOPn (SvNV(TOPs))
139 #define TOPi ((IV)SvIV(TOPs))
140 #define TOPu ((UV)SvUV(TOPs))
141 #define TOPl ((long)SvIV(TOPs))
142 #define TOPul ((unsigned long)SvUV(TOPs))
144 #define TOPq ((Quad_t)SvIV(TOPs))
145 #define TOPuq ((Uquad_t)SvUV(TOPs))
148 /* Go to some pains in the rare event that we must extend the stack. */
151 =for apidoc Am|void|EXTEND|SP|int nitems
152 Used to extend the argument stack for an XSUB's return values. Once
153 used, guarantees that there is room for at least C<nitems> to be pushed
156 =for apidoc Am|void|PUSHs|SV* sv
157 Push an SV onto the stack. The stack must have room for this element.
158 Does not handle 'set' magic. See C<XPUSHs>.
160 =for apidoc Am|void|PUSHp|char* str|STRLEN len
161 Push a string onto the stack. The stack must have room for this element.
162 The C<len> indicates the length of the string. Handles 'set' magic. See
165 =for apidoc Am|void|PUSHn|NV nv
166 Push a double onto the stack. The stack must have room for this element.
167 Handles 'set' magic. See C<XPUSHn>.
169 =for apidoc Am|void|PUSHi|IV iv
170 Push an integer onto the stack. The stack must have room for this element.
171 Handles 'set' magic. See C<XPUSHi>.
173 =for apidoc Am|void|PUSHu|UV uv
174 Push an unsigned integer onto the stack. The stack must have room for this
175 element. See C<XPUSHu>.
177 =for apidoc Am|void|XPUSHs|SV* sv
178 Push an SV onto the stack, extending the stack if necessary. Does not
179 handle 'set' magic. See C<PUSHs>.
181 =for apidoc Am|void|XPUSHp|char* str|STRLEN len
182 Push a string onto the stack, extending the stack if necessary. The C<len>
183 indicates the length of the string. Handles 'set' magic. See
186 =for apidoc Am|void|XPUSHn|NV nv
187 Push a double onto the stack, extending the stack if necessary. Handles
188 'set' magic. See C<PUSHn>.
190 =for apidoc Am|void|XPUSHi|IV iv
191 Push an integer onto the stack, extending the stack if necessary. Handles
192 'set' magic. See C<PUSHi>.
194 =for apidoc Am|void|XPUSHu|UV uv
195 Push an unsigned integer onto the stack, extending the stack if necessary.
201 #define EXTEND(p,n) STMT_START { if (PL_stack_max - p < (n)) { \
202 sp = stack_grow(sp,p, (int) (n)); \
205 /* Same thing, but update mark register too. */
206 #define MEXTEND(p,n) STMT_START {if (PL_stack_max - p < (n)) { \
207 int markoff = mark - PL_stack_base; \
208 sp = stack_grow(sp,p,(int) (n)); \
209 mark = PL_stack_base + markoff; \
212 #define PUSHs(s) (*++sp = (s))
213 #define PUSHTARG STMT_START { SvSETMAGIC(TARG); PUSHs(TARG); } STMT_END
214 #define PUSHp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); PUSHTARG; } STMT_END
215 #define PUSHn(n) STMT_START { sv_setnv(TARG, (NV)(n)); PUSHTARG; } STMT_END
216 #define PUSHi(i) STMT_START { sv_setiv(TARG, (IV)(i)); PUSHTARG; } STMT_END
217 #define PUSHu(u) STMT_START { sv_setuv(TARG, (UV)(u)); PUSHTARG; } STMT_END
219 #define XPUSHs(s) STMT_START { EXTEND(sp,1); (*++sp = (s)); } STMT_END
220 #define XPUSHTARG STMT_START { SvSETMAGIC(TARG); XPUSHs(TARG); } STMT_END
221 #define XPUSHp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); XPUSHTARG; } STMT_END
222 #define XPUSHn(n) STMT_START { sv_setnv(TARG, (NV)(n)); XPUSHTARG; } STMT_END
223 #define XPUSHi(i) STMT_START { sv_setiv(TARG, (IV)(i)); XPUSHTARG; } STMT_END
224 #define XPUSHu(u) STMT_START { sv_setuv(TARG, (UV)(u)); XPUSHTARG; } STMT_END
225 #define XPUSHundef STMT_START { SvOK_off(TARG); XPUSHs(TARG); } STMT_END
227 #define SETs(s) (*sp = s)
228 #define SETTARG STMT_START { SvSETMAGIC(TARG); SETs(TARG); } STMT_END
229 #define SETp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); SETTARG; } STMT_END
230 #define SETn(n) STMT_START { sv_setnv(TARG, (NV)(n)); SETTARG; } STMT_END
231 #define SETi(i) STMT_START { sv_setiv(TARG, (IV)(i)); SETTARG; } STMT_END
232 #define SETu(u) STMT_START { sv_setuv(TARG, (UV)(u)); SETTARG; } STMT_END
234 #define dTOPss SV *sv = TOPs
235 #define dPOPss SV *sv = POPs
236 #define dTOPnv NV value = TOPn
237 #define dPOPnv NV value = POPn
238 #define dTOPiv IV value = TOPi
239 #define dPOPiv IV value = POPi
240 #define dTOPuv UV value = TOPu
241 #define dPOPuv UV value = POPu
243 #define dTOPqv Quad_t value = TOPu
244 #define dPOPqv Quad_t value = POPu
245 #define dTOPuqv Uquad_t value = TOPuq
246 #define dPOPuqv Uquad_t value = POPuq
249 #define dPOPXssrl(X) SV *right = POPs; SV *left = CAT2(X,s)
250 #define dPOPXnnrl(X) NV right = POPn; NV left = CAT2(X,n)
251 #define dPOPXiirl(X) IV right = POPi; IV left = CAT2(X,i)
253 #define USE_LEFT(sv) \
254 (SvOK(sv) || SvGMAGICAL(sv) || !(PL_op->op_flags & OPf_STACKED))
255 #define dPOPXnnrl_ul(X) \
257 SV *leftsv = CAT2(X,s); \
258 NV left = USE_LEFT(leftsv) ? SvNV(leftsv) : 0.0
259 #define dPOPXiirl_ul(X) \
261 SV *leftsv = CAT2(X,s); \
262 IV left = USE_LEFT(leftsv) ? SvIV(leftsv) : 0
264 #define dPOPPOPssrl dPOPXssrl(POP)
265 #define dPOPPOPnnrl dPOPXnnrl(POP)
266 #define dPOPPOPnnrl_ul dPOPXnnrl_ul(POP)
267 #define dPOPPOPiirl dPOPXiirl(POP)
268 #define dPOPPOPiirl_ul dPOPXiirl_ul(POP)
270 #define dPOPTOPssrl dPOPXssrl(TOP)
271 #define dPOPTOPnnrl dPOPXnnrl(TOP)
272 #define dPOPTOPnnrl_ul dPOPXnnrl_ul(TOP)
273 #define dPOPTOPiirl dPOPXiirl(TOP)
274 #define dPOPTOPiirl_ul dPOPXiirl_ul(TOP)
276 #define RETPUSHYES RETURNX(PUSHs(&PL_sv_yes))
277 #define RETPUSHNO RETURNX(PUSHs(&PL_sv_no))
278 #define RETPUSHUNDEF RETURNX(PUSHs(&PL_sv_undef))
280 #define RETSETYES RETURNX(SETs(&PL_sv_yes))
281 #define RETSETNO RETURNX(SETs(&PL_sv_no))
282 #define RETSETUNDEF RETURNX(SETs(&PL_sv_undef))
284 #define ARGTARG PL_op->op_targ
286 /* See OPpTARGET_MY: */
287 #define MAXARG (PL_op->op_private & 15)
289 #define SWITCHSTACK(f,t) \
291 AvFILLp(f) = sp - PL_stack_base; \
292 PL_stack_base = AvARRAY(t); \
293 PL_stack_max = PL_stack_base + AvMAX(t); \
294 sp = PL_stack_sp = PL_stack_base + AvFILLp(t); \
298 #define EXTEND_MORTAL(n) \
300 if (PL_tmps_ix + (n) >= PL_tmps_max) \
304 #define AMGf_noright 1
305 #define AMGf_noleft 2
306 #define AMGf_assign 4
309 #define tryAMAGICbinW(meth,assign,set) STMT_START { \
310 if (PL_amagic_generation) { \
312 SV* right= *(sp); SV* left= *(sp-1);\
313 if ((SvAMAGIC(left)||SvAMAGIC(right))&&\
314 (tmpsv=amagic_call(left, \
317 (assign)? AMGf_assign: 0))) {\
319 (void)POPs; set(tmpsv); RETURN; } \
323 #define tryAMAGICbin(meth,assign) tryAMAGICbinW(meth,assign,SETsv)
324 #define tryAMAGICbinSET(meth,assign) tryAMAGICbinW(meth,assign,SETs)
326 #define AMG_CALLun(sv,meth) amagic_call(sv,&PL_sv_undef, \
327 CAT2(meth,_amg),AMGf_noright | AMGf_unary)
328 #define AMG_CALLbinL(left,right,meth) \
329 amagic_call(left,right,CAT2(meth,_amg),AMGf_noright)
331 #define tryAMAGICunW(meth,set,shift,ret) STMT_START { \
332 if (PL_amagic_generation) { \
334 SV* arg= sp[shift]; \
336 if ((SvAMAGIC(arg))&&\
337 (tmpsv=AMG_CALLun(arg,meth))) {\
338 SPAGAIN; if (shift) sp += shift; \
343 #define FORCE_SETs(sv) STMT_START { sv_setsv(TARG, (sv)); SETTARG; } STMT_END
345 #define tryAMAGICun(meth) tryAMAGICunW(meth,SETsvUN,0,RETURN)
346 #define tryAMAGICunSET(meth) tryAMAGICunW(meth,SETs,0,RETURN)
347 #define tryAMAGICunTARGET(meth, shift) \
348 { dSP; sp--; /* get TARGET from below PL_stack_sp */ \
350 { dSP; tryAMAGICunW(meth,FORCE_SETs,shift,RETURN);}}}
352 #define setAGAIN(ref) sv = ref; \
354 Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); \
355 if (ref != arg && SvRV(ref) != SvRV(arg)) { \
360 #define tryAMAGICunDEREF(meth) tryAMAGICunW(meth,setAGAIN,0,(void)0)
362 #define opASSIGN (PL_op->op_flags & OPf_STACKED)
363 #define SETsv(sv) STMT_START { \
364 if (opASSIGN || (SvFLAGS(TARG) & SVs_PADMY)) \
365 { sv_setsv(TARG, (sv)); SETTARG; } \
366 else SETs(sv); } STMT_END
368 #define SETsvUN(sv) STMT_START { \
369 if (SvFLAGS(TARG) & SVs_PADMY) \
370 { sv_setsv(TARG, (sv)); SETTARG; } \
371 else SETs(sv); } STMT_END
373 /* newSVsv does not behave as advertised, so we copy missing
374 * information by hand */
376 /* SV* ref causes confusion with the member variable
377 changed SV* ref to SV* tmpRef */
378 #define RvDEEPCP(rv) STMT_START { SV* tmpRef=SvRV(rv); \
379 if (SvREFCNT(tmpRef)>1) { \
380 SvREFCNT_dec(tmpRef); \
381 SvRV(rv)=AMG_CALLun(rv,copy); \