lib/perl5/5.6.1/msys/CORE/pp.h

   1 /*    pp.h
   2  *
   3  *    Copyright (c) 1991-2001, Larry Wall
   4  *
   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.
   7  *
   8  */
   9
  10 #ifdef USE_THREADS
  11 #define ARGS thr
  12 #define dARGS struct perl_thread *thr;
  13 #else
  14 #define ARGS
  15 #define dARGS
  16 #endif /* USE_THREADS */
  17
  18 #define PP(s) OP * Perl_##s(pTHX)
  19
  20 /*
  21 =for apidoc AmU||SP
  22 Stack pointer.  This is usually handled by C<xsubpp>.  See C<dSP> and
  23 C<SPAGAIN>.
  24
  25 =for apidoc AmU||MARK
  26 Stack marker variable for the XSUB.  See C<dMARK>.
  27
  28 =for apidoc Ams||PUSHMARK
  29 Opening bracket for arguments on a callback.  See C<PUTBACK> and
  30 L<perlcall>.
  31
  32 =for apidoc Ams||dSP
  33 Declares a local copy of perl's stack pointer for the XSUB, available via
  34 the C<SP> macro.  See C<SP>.
  35
  36 =for apidoc Ams||dMARK
  37 Declare a stack marker variable, C<mark>, for the XSUB.  See C<MARK> and
  38 C<dORIGMARK>.
  39
  40 =for apidoc Ams||dORIGMARK
  41 Saves the original stack mark for the XSUB.  See C<ORIGMARK>.
  42
  43 =for apidoc AmU||ORIGMARK
  44 The original stack mark for the XSUB.  See C<dORIGMARK>.
  45
  46 =for apidoc Ams||SPAGAIN
  47 Refetch the stack pointer.  Used after a callback.  See L<perlcall>.
  48
  49 =cut
  50 */
  51
  52 #undef SP /* Solaris 2.7 i386 has this in /usr/include/sys/reg.h */
  53 #define SP sp
  54 #define MARK mark
  55 #define TARG targ
  56
  57 #define PUSHMARK(p) if (++PL_markstack_ptr == PL_markstack_max) \
  58                         markstack_grow();                       \
  59                     *PL_markstack_ptr = (p) - PL_stack_base
  60
  61 #define TOPMARK         (*PL_markstack_ptr)
  62 #define POPMARK         (*PL_markstack_ptr--)
  63
  64 #define dSP             register SV **sp = PL_stack_sp
  65 #define djSP            dSP
  66 #define dMARK           register SV **mark = PL_stack_base + POPMARK
  67 #define dORIGMARK       I32 origmark = mark - PL_stack_base
  68 #define SETORIGMARK     origmark = mark - PL_stack_base
  69 #define ORIGMARK        (PL_stack_base + origmark)
  70
  71 #define SPAGAIN         sp = PL_stack_sp
  72 #define MSPAGAIN        sp = PL_stack_sp; mark = ORIGMARK
  73
  74 #define GETTARGETSTACKED targ = (PL_op->op_flags & OPf_STACKED ? POPs : PAD_SV(PL_op->op_targ))
  75 #define dTARGETSTACKED SV * GETTARGETSTACKED
  76
  77 #define GETTARGET targ = PAD_SV(PL_op->op_targ)
  78 #define dTARGET SV * GETTARGET
  79
  80 #define GETATARGET targ = (PL_op->op_flags & OPf_STACKED ? sp[-1] : PAD_SV(PL_op->op_targ))
  81 #define dATARGET SV * GETATARGET
  82
  83 #define dTARG SV *targ
  84
  85 #define NORMAL PL_op->op_next
  86 #define DIE return Perl_die
  87
  88 /*
  89 =for apidoc Ams||PUTBACK
  90 Closing bracket for XSUB arguments.  This is usually handled by C<xsubpp>.
  91 See C<PUSHMARK> and L<perlcall> for other uses.
  92
  93 =for apidoc Amn|SV*|POPs
  94 Pops an SV off the stack.
  95
  96 =for apidoc Amn|char*|POPp
  97 Pops a string off the stack.
  98
  99 =for apidoc Amn|NV|POPn
 100 Pops a double off the stack.
 101
 102 =for apidoc Amn|IV|POPi
 103 Pops an integer off the stack.
 104
 105 =for apidoc Amn|long|POPl
 106 Pops a long off the stack.
 107
 108 =cut
 109 */
 110
 111 #define PUTBACK         PL_stack_sp = sp
 112 #define RETURN          return PUTBACK, NORMAL
 113 #define RETURNOP(o)     return PUTBACK, o
 114 #define RETURNX(x)      return x, PUTBACK, NORMAL
 115
 116 #define POPs            (*sp--)
 117 #define POPp            (SvPVx(POPs, PL_na))            /* deprecated */
 118 #define POPpx           (SvPVx(POPs, n_a))
 119 #define POPn            (SvNVx(POPs))
 120 #define POPi            ((IV)SvIVx(POPs))
 121 #define POPu            ((UV)SvUVx(POPs))
 122 #define POPl            ((long)SvIVx(POPs))
 123 #define POPul           ((unsigned long)SvIVx(POPs))
 124 #ifdef HAS_QUAD
 125 #define POPq            ((Quad_t)SvIVx(POPs))
 126 #define POPuq           ((Uquad_t)SvUVx(POPs))
 127 #endif
 128
 129 #define TOPs            (*sp)
 130 #define TOPm1s          (*(sp-1))
 131 #define TOPp1s          (*(sp+1))
 132 #define TOPp            (SvPV(TOPs, PL_na))             /* deprecated */
 133 #define TOPpx           (SvPV(TOPs, n_a))
 134 #define TOPn            (SvNV(TOPs))
 135 #define TOPi            ((IV)SvIV(TOPs))
 136 #define TOPu            ((UV)SvUV(TOPs))
 137 #define TOPl            ((long)SvIV(TOPs))
 138 #define TOPul           ((unsigned long)SvUV(TOPs))
 139 #ifdef HAS_QUAD
 140 #define TOPq            ((Quad_t)SvIV(TOPs))
 141 #define TOPuq           ((Uquad_t)SvUV(TOPs))
 142 #endif
 143
 144 /* Go to some pains in the rare event that we must extend the stack. */
 145
 146 /*
 147 =for apidoc Am|void|EXTEND|SP|int nitems
 148 Used to extend the argument stack for an XSUB's return values. Once
 149 used, guarantees that there is room for at least C<nitems> to be pushed
 150 onto the stack.
 151
 152 =for apidoc Am|void|PUSHs|SV* sv
 153 Push an SV onto the stack.  The stack must have room for this element.
 154 Does not handle 'set' magic.  See C<XPUSHs>.
 155
 156 =for apidoc Am|void|PUSHp|char* str|STRLEN len
 157 Push a string onto the stack.  The stack must have room for this element.
 158 The C<len> indicates the length of the string.  Handles 'set' magic.  See
 159 C<XPUSHp>.
 160
 161 =for apidoc Am|void|PUSHn|NV nv
 162 Push a double onto the stack.  The stack must have room for this element.
 163 Handles 'set' magic.  See C<XPUSHn>.
 164
 165 =for apidoc Am|void|PUSHi|IV iv
 166 Push an integer onto the stack.  The stack must have room for this element.
 167 Handles 'set' magic.  See C<XPUSHi>.
 168
 169 =for apidoc Am|void|PUSHu|UV uv
 170 Push an unsigned integer onto the stack.  The stack must have room for this
 171 element.  See C<XPUSHu>.
 172
 173 =for apidoc Am|void|XPUSHs|SV* sv
 174 Push an SV onto the stack, extending the stack if necessary.  Does not
 175 handle 'set' magic.  See C<PUSHs>.
 176
 177 =for apidoc Am|void|XPUSHp|char* str|STRLEN len
 178 Push a string onto the stack, extending the stack if necessary.  The C<len>
 179 indicates the length of the string.  Handles 'set' magic.  See
 180 C<PUSHp>.
 181
 182 =for apidoc Am|void|XPUSHn|NV nv
 183 Push a double onto the stack, extending the stack if necessary.  Handles
 184 'set' magic.  See C<PUSHn>.
 185
 186 =for apidoc Am|void|XPUSHi|IV iv
 187 Push an integer onto the stack, extending the stack if necessary.  Handles
 188 'set' magic. See C<PUSHi>.
 189
 190 =for apidoc Am|void|XPUSHu|UV uv
 191 Push an unsigned integer onto the stack, extending the stack if necessary.
 192 See C<PUSHu>.
 193
 194 =cut
 195 */
 196
 197 #define EXTEND(p,n)     STMT_START { if (PL_stack_max - p < (n)) {              \
 198                             sp = stack_grow(sp,p, (int) (n));           \
 199                         } } STMT_END
 200
 201 /* Same thing, but update mark register too. */
 202 #define MEXTEND(p,n)    STMT_START {if (PL_stack_max - p < (n)) {               \
 203                             int markoff = mark - PL_stack_base;         \
 204                             sp = stack_grow(sp,p,(int) (n));            \
 205                             mark = PL_stack_base + markoff;             \
 206                         } } STMT_END
 207
 208 #define PUSHs(s)        (*++sp = (s))
 209 #define PUSHTARG        STMT_START { SvSETMAGIC(TARG); PUSHs(TARG); } STMT_END
 210 #define PUSHp(p,l)      STMT_START { sv_setpvn(TARG, (p), (l)); PUSHTARG; } STMT_END
 211 #define PUSHn(n)        STMT_START { sv_setnv(TARG, (NV)(n)); PUSHTARG; } STMT_END
 212 #define PUSHi(i)        STMT_START { sv_setiv(TARG, (IV)(i)); PUSHTARG; } STMT_END
 213 #define PUSHu(u)        STMT_START { sv_setuv(TARG, (UV)(u)); PUSHTARG; } STMT_END
 214
 215 #define XPUSHs(s)       STMT_START { EXTEND(sp,1); (*++sp = (s)); } STMT_END
 216 #define XPUSHTARG       STMT_START { SvSETMAGIC(TARG); XPUSHs(TARG); } STMT_END
 217 #define XPUSHp(p,l)     STMT_START { sv_setpvn(TARG, (p), (l)); XPUSHTARG; } STMT_END
 218 #define XPUSHn(n)       STMT_START { sv_setnv(TARG, (NV)(n)); XPUSHTARG; } STMT_END
 219 #define XPUSHi(i)       STMT_START { sv_setiv(TARG, (IV)(i)); XPUSHTARG; } STMT_END
 220 #define XPUSHu(u)       STMT_START { sv_setuv(TARG, (UV)(u)); XPUSHTARG; } STMT_END
 221 #define XPUSHundef      STMT_START { SvOK_off(TARG); XPUSHs(TARG); } STMT_END
 222
 223 #define SETs(s)         (*sp = s)
 224 #define SETTARG         STMT_START { SvSETMAGIC(TARG); SETs(TARG); } STMT_END
 225 #define SETp(p,l)       STMT_START { sv_setpvn(TARG, (p), (l)); SETTARG; } STMT_END
 226 #define SETn(n)         STMT_START { sv_setnv(TARG, (NV)(n)); SETTARG; } STMT_END
 227 #define SETi(i)         STMT_START { sv_setiv(TARG, (IV)(i)); SETTARG; } STMT_END
 228 #define SETu(u)         STMT_START { sv_setuv(TARG, (UV)(u)); SETTARG; } STMT_END
 229
 230 #define dTOPss          SV *sv = TOPs
 231 #define dPOPss          SV *sv = POPs
 232 #define dTOPnv          NV value = TOPn
 233 #define dPOPnv          NV value = POPn
 234 #define dTOPiv          IV value = TOPi
 235 #define dPOPiv          IV value = POPi
 236 #define dTOPuv          UV value = TOPu
 237 #define dPOPuv          UV value = POPu
 238 #ifdef HAS_QUAD
 239 #define dTOPqv          Quad_t value = TOPu
 240 #define dPOPqv          Quad_t value = POPu
 241 #define dTOPuqv         Uquad_t value = TOPuq
 242 #define dPOPuqv         Uquad_t value = POPuq
 243 #endif
 244
 245 #define dPOPXssrl(X)    SV *right = POPs; SV *left = CAT2(X,s)
 246 #define dPOPXnnrl(X)    NV right = POPn; NV left = CAT2(X,n)
 247 #define dPOPXiirl(X)    IV right = POPi; IV left = CAT2(X,i)
 248
 249 #define USE_LEFT(sv) \
 250         (SvOK(sv) || SvGMAGICAL(sv) || !(PL_op->op_flags & OPf_STACKED))
 251 #define dPOPXnnrl_ul(X) \
 252     NV right = POPn;                            \
 253     SV *leftsv = CAT2(X,s);                             \
 254     NV left = USE_LEFT(leftsv) ? SvNV(leftsv) : 0.0
 255 #define dPOPXiirl_ul(X) \
 256     IV right = POPi;                                    \
 257     SV *leftsv = CAT2(X,s);                             \
 258     IV left = USE_LEFT(leftsv) ? SvIV(leftsv) : 0
 259
 260 #define dPOPPOPssrl     dPOPXssrl(POP)
 261 #define dPOPPOPnnrl     dPOPXnnrl(POP)
 262 #define dPOPPOPnnrl_ul  dPOPXnnrl_ul(POP)
 263 #define dPOPPOPiirl     dPOPXiirl(POP)
 264 #define dPOPPOPiirl_ul  dPOPXiirl_ul(POP)
 265
 266 #define dPOPTOPssrl     dPOPXssrl(TOP)
 267 #define dPOPTOPnnrl     dPOPXnnrl(TOP)
 268 #define dPOPTOPnnrl_ul  dPOPXnnrl_ul(TOP)
 269 #define dPOPTOPiirl     dPOPXiirl(TOP)
 270 #define dPOPTOPiirl_ul  dPOPXiirl_ul(TOP)
 271
 272 #define RETPUSHYES      RETURNX(PUSHs(&PL_sv_yes))
 273 #define RETPUSHNO       RETURNX(PUSHs(&PL_sv_no))
 274 #define RETPUSHUNDEF    RETURNX(PUSHs(&PL_sv_undef))
 275
 276 #define RETSETYES       RETURNX(SETs(&PL_sv_yes))
 277 #define RETSETNO        RETURNX(SETs(&PL_sv_no))
 278 #define RETSETUNDEF     RETURNX(SETs(&PL_sv_undef))
 279
 280 #define ARGTARG         PL_op->op_targ
 281
 282     /* See OPpTARGET_MY: */
 283 #define MAXARG          (PL_op->op_private & 15)
 284
 285 #define SWITCHSTACK(f,t) \
 286     STMT_START {                                                        \
 287         AvFILLp(f) = sp - PL_stack_base;                                \
 288         PL_stack_base = AvARRAY(t);                                     \
 289         PL_stack_max = PL_stack_base + AvMAX(t);                        \
 290         sp = PL_stack_sp = PL_stack_base + AvFILLp(t);                  \
 291         PL_curstack = t;                                                \
 292     } STMT_END
 293
 294 #define EXTEND_MORTAL(n) \
 295     STMT_START {                                                        \
 296         if (PL_tmps_ix + (n) >= PL_tmps_max)                            \
 297             tmps_grow(n);                                               \
 298     } STMT_END
 299
 300 #define AMGf_noright    1
 301 #define AMGf_noleft     2
 302 #define AMGf_assign     4
 303 #define AMGf_unary      8
 304
 305 #define tryAMAGICbinW(meth,assign,set) STMT_START { \
 306           if (PL_amagic_generation) { \
 307             SV* tmpsv; \
 308             SV* right= *(sp); SV* left= *(sp-1);\
 309             if ((SvAMAGIC(left)||SvAMAGIC(right))&&\
 310                 (tmpsv=amagic_call(left, \
 311                                    right, \
 312                                    CAT2(meth,_amg), \
 313                                    (assign)? AMGf_assign: 0))) {\
 314                SPAGAIN; \
 315                (void)POPs; set(tmpsv); RETURN; } \
 316           } \
 317         } STMT_END
 318
 319 #define tryAMAGICbin(meth,assign) tryAMAGICbinW(meth,assign,SETsv)
 320 #define tryAMAGICbinSET(meth,assign) tryAMAGICbinW(meth,assign,SETs)
 321
 322 #define AMG_CALLun(sv,meth) amagic_call(sv,&PL_sv_undef,  \
 323                                         CAT2(meth,_amg),AMGf_noright | AMGf_unary)
 324 #define AMG_CALLbinL(left,right,meth) \
 325             amagic_call(left,right,CAT2(meth,_amg),AMGf_noright)
 326
 327 #define tryAMAGICunW(meth,set,shift,ret) STMT_START { \
 328           if (PL_amagic_generation) { \
 329             SV* tmpsv; \
 330             SV* arg= sp[shift]; \
 331           am_again: \
 332             if ((SvAMAGIC(arg))&&\
 333                 (tmpsv=AMG_CALLun(arg,meth))) {\
 334                SPAGAIN; if (shift) sp += shift; \
 335                set(tmpsv); ret; } \
 336           } \
 337         } STMT_END
 338
 339 #define FORCE_SETs(sv) STMT_START { sv_setsv(TARG, (sv)); SETTARG; } STMT_END
 340
 341 #define tryAMAGICun(meth)       tryAMAGICunW(meth,SETsvUN,0,RETURN)
 342 #define tryAMAGICunSET(meth)    tryAMAGICunW(meth,SETs,0,RETURN)
 343 #define tryAMAGICunTARGET(meth, shift)                                  \
 344         { dSP; sp--;    /* get TARGET from below PL_stack_sp */         \
 345             { dTARGETSTACKED;                                           \
 346                 { dSP; tryAMAGICunW(meth,FORCE_SETs,shift,RETURN);}}}
 347
 348 #define setAGAIN(ref) sv = ref;                                                 \
 349   if (!SvROK(ref))                                                              \
 350       Perl_croak(aTHX_ "Overloaded dereference did not return a reference");    \
 351   if (ref != arg && SvRV(ref) != SvRV(arg)) {                                   \
 352       arg = ref;                                                                \
 353       goto am_again;                                                            \
 354   }
 355
 356 #define tryAMAGICunDEREF(meth) tryAMAGICunW(meth,setAGAIN,0,(void)0)
 357
 358 #define opASSIGN (PL_op->op_flags & OPf_STACKED)
 359 #define SETsv(sv)       STMT_START {                                    \
 360                 if (opASSIGN || (SvFLAGS(TARG) & SVs_PADMY))            \
 361                    { sv_setsv(TARG, (sv)); SETTARG; }                   \
 362                 else SETs(sv); } STMT_END
 363
 364 #define SETsvUN(sv)     STMT_START {                                    \
 365                 if (SvFLAGS(TARG) & SVs_PADMY)          \
 366                    { sv_setsv(TARG, (sv)); SETTARG; }                   \
 367                 else SETs(sv); } STMT_END
 368
 369 /* newSVsv does not behave as advertised, so we copy missing
 370  * information by hand */
 371
 372 /* SV* ref causes confusion with the member variable
 373    changed SV* ref to SV* tmpRef */
 374 #define RvDEEPCP(rv) STMT_START { SV* tmpRef=SvRV(rv);      \
 375   if (SvREFCNT(tmpRef)>1) {                 \
 376     SvREFCNT_dec(tmpRef);                   \
 377     SvRV(rv)=AMG_CALLun(rv,copy);        \
 378   } } STMT_END
 379
 380 /*
 381 =for apidoc mU||LVRET
 382 True if this op will be the return value of an lvalue subroutine
 383
 384 =cut */
 385 #define LVRET ((PL_op->op_private & OPpMAYBE_LVSUB) && is_lvalue_sub())