| 1 | /* pp.h |
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| 2 | * |
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| 3 | * Copyright (c) 1991-2002, Larry Wall |
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| 4 | * |
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| 5 | * You may distribute under the terms of either the GNU General Public |
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| 6 | * License or the Artistic License, as specified in the README file. |
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| 7 | * |
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| 8 | */ |
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| 9 | |
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| 10 | #ifdef USE_5005THREADS |
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| 11 | #define ARGS thr |
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| 12 | #define dARGS struct perl_thread *thr; |
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| 13 | #else |
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| 14 | #define ARGS |
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| 15 | #define dARGS |
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| 16 | #endif /* USE_5005THREADS */ |
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| 17 | |
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| 18 | #define PP(s) OP * Perl_##s(pTHX) |
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| 19 | |
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| 20 | /* |
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| 21 | =head1 Stack Manipulation Macros |
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| 22 | |
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| 23 | =for apidoc AmU||SP |
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| 24 | Stack pointer. This is usually handled by C<xsubpp>. See C<dSP> and |
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| 25 | C<SPAGAIN>. |
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| 26 | |
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| 27 | =for apidoc AmU||MARK |
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| 28 | Stack marker variable for the XSUB. See C<dMARK>. |
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| 29 | |
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| 30 | =for apidoc Ams||PUSHMARK |
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| 31 | Opening bracket for arguments on a callback. See C<PUTBACK> and |
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| 32 | L<perlcall>. |
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| 33 | |
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| 34 | =for apidoc Ams||dSP |
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| 35 | Declares a local copy of perl's stack pointer for the XSUB, available via |
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| 36 | the C<SP> macro. See C<SP>. |
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| 37 | |
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| 38 | =for apidoc ms||djSP |
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| 39 | |
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| 40 | Declare Just C<SP>. This is actually identical to C<dSP>, and declares |
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| 41 | a local copy of perl's stack pointer, available via the C<SP> macro. |
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| 42 | See C<SP>. (Available for backward source code compatibility with the |
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| 43 | old (Perl 5.005) thread model.) |
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| 44 | |
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| 45 | =for apidoc Ams||dMARK |
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| 46 | Declare a stack marker variable, C<mark>, for the XSUB. See C<MARK> and |
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| 47 | C<dORIGMARK>. |
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| 48 | |
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| 49 | =for apidoc Ams||dORIGMARK |
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| 50 | Saves the original stack mark for the XSUB. See C<ORIGMARK>. |
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| 51 | |
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| 52 | =for apidoc AmU||ORIGMARK |
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| 53 | The original stack mark for the XSUB. See C<dORIGMARK>. |
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| 54 | |
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| 55 | =for apidoc Ams||SPAGAIN |
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| 56 | Refetch the stack pointer. Used after a callback. See L<perlcall>. |
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| 57 | |
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| 58 | =cut */ |
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| 59 | |
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| 60 | #undef SP /* Solaris 2.7 i386 has this in /usr/include/sys/reg.h */ |
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| 61 | #define SP sp |
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| 62 | #define MARK mark |
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| 63 | #define TARG targ |
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| 64 | |
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| 65 | #define PUSHMARK(p) if (++PL_markstack_ptr == PL_markstack_max) \ |
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| 66 | markstack_grow(); \ |
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| 67 | *PL_markstack_ptr = (p) - PL_stack_base |
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| 68 | |
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| 69 | #define TOPMARK (*PL_markstack_ptr) |
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| 70 | #define POPMARK (*PL_markstack_ptr--) |
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| 71 | |
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| 72 | #define dSP register SV **sp = PL_stack_sp |
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| 73 | #define djSP dSP |
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| 74 | #define dMARK register SV **mark = PL_stack_base + POPMARK |
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| 75 | #define dORIGMARK I32 origmark = mark - PL_stack_base |
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| 76 | #define SETORIGMARK origmark = mark - PL_stack_base |
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| 77 | #define ORIGMARK (PL_stack_base + origmark) |
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| 78 | |
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| 79 | #define SPAGAIN sp = PL_stack_sp |
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| 80 | #define MSPAGAIN sp = PL_stack_sp; mark = ORIGMARK |
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| 81 | |
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| 82 | #define GETTARGETSTACKED targ = (PL_op->op_flags & OPf_STACKED ? POPs : PAD_SV(PL_op->op_targ)) |
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| 83 | #define dTARGETSTACKED SV * GETTARGETSTACKED |
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| 84 | |
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| 85 | #define GETTARGET targ = PAD_SV(PL_op->op_targ) |
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| 86 | #define dTARGET SV * GETTARGET |
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| 87 | |
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| 88 | #define GETATARGET targ = (PL_op->op_flags & OPf_STACKED ? sp[-1] : PAD_SV(PL_op->op_targ)) |
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| 89 | #define dATARGET SV * GETATARGET |
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| 90 | |
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| 91 | #define dTARG SV *targ |
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| 92 | |
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| 93 | #define NORMAL PL_op->op_next |
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| 94 | #define DIE return Perl_die |
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| 95 | |
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| 96 | /* |
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| 97 | =for apidoc Ams||PUTBACK |
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| 98 | Closing bracket for XSUB arguments. This is usually handled by C<xsubpp>. |
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| 99 | See C<PUSHMARK> and L<perlcall> for other uses. |
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| 100 | |
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| 101 | =for apidoc Amn|SV*|POPs |
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| 102 | Pops an SV off the stack. |
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| 103 | |
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| 104 | =for apidoc Amn|char*|POPp |
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| 105 | Pops a string off the stack. Deprecated. New code should provide |
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| 106 | a STRLEN n_a and use POPpx. |
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| 107 | |
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| 108 | =for apidoc Amn|char*|POPpx |
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| 109 | Pops a string off the stack. |
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| 110 | Requires a variable STRLEN n_a in scope. |
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| 111 | |
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| 112 | =for apidoc Amn|char*|POPpbytex |
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| 113 | Pops a string off the stack which must consist of bytes i.e. characters < 256. |
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| 114 | Requires a variable STRLEN n_a in scope. |
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| 115 | |
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| 116 | =for apidoc Amn|NV|POPn |
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| 117 | Pops a double off the stack. |
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| 118 | |
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| 119 | =for apidoc Amn|IV|POPi |
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| 120 | Pops an integer off the stack. |
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| 121 | |
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| 122 | =for apidoc Amn|long|POPl |
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| 123 | Pops a long off the stack. |
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| 124 | |
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| 125 | =cut |
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| 126 | */ |
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| 127 | |
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| 128 | #define PUTBACK PL_stack_sp = sp |
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| 129 | #define RETURN return PUTBACK, NORMAL |
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| 130 | #define RETURNOP(o) return PUTBACK, o |
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| 131 | #define RETURNX(x) return x, PUTBACK, NORMAL |
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| 132 | |
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| 133 | #define POPs (*sp--) |
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| 134 | #define POPp (SvPVx(POPs, PL_na)) /* deprecated */ |
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| 135 | #define POPpx (SvPVx(POPs, n_a)) |
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| 136 | #define POPpbytex (SvPVbytex(POPs, n_a)) |
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| 137 | #define POPn (SvNVx(POPs)) |
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| 138 | #define POPi ((IV)SvIVx(POPs)) |
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| 139 | #define POPu ((UV)SvUVx(POPs)) |
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| 140 | #define POPl ((long)SvIVx(POPs)) |
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| 141 | #define POPul ((unsigned long)SvIVx(POPs)) |
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| 142 | #ifdef HAS_QUAD |
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| 143 | #define POPq ((Quad_t)SvIVx(POPs)) |
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| 144 | #define POPuq ((Uquad_t)SvUVx(POPs)) |
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| 145 | #endif |
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| 146 | |
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| 147 | #define TOPs (*sp) |
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| 148 | #define TOPm1s (*(sp-1)) |
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| 149 | #define TOPp1s (*(sp+1)) |
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| 150 | #define TOPp (SvPV(TOPs, PL_na)) /* deprecated */ |
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| 151 | #define TOPpx (SvPV(TOPs, n_a)) |
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| 152 | #define TOPn (SvNV(TOPs)) |
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| 153 | #define TOPi ((IV)SvIV(TOPs)) |
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| 154 | #define TOPu ((UV)SvUV(TOPs)) |
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| 155 | #define TOPl ((long)SvIV(TOPs)) |
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| 156 | #define TOPul ((unsigned long)SvUV(TOPs)) |
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| 157 | #ifdef HAS_QUAD |
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| 158 | #define TOPq ((Quad_t)SvIV(TOPs)) |
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| 159 | #define TOPuq ((Uquad_t)SvUV(TOPs)) |
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| 160 | #endif |
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| 161 | |
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| 162 | /* Go to some pains in the rare event that we must extend the stack. */ |
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| 163 | |
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| 164 | /* |
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| 165 | =for apidoc Am|void|EXTEND|SP|int nitems |
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| 166 | Used to extend the argument stack for an XSUB's return values. Once |
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| 167 | used, guarantees that there is room for at least C<nitems> to be pushed |
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| 168 | onto the stack. |
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| 169 | |
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| 170 | =for apidoc Am|void|PUSHs|SV* sv |
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| 171 | Push an SV onto the stack. The stack must have room for this element. |
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| 172 | Does not handle 'set' magic. See C<XPUSHs>. |
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| 173 | |
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| 174 | =for apidoc Am|void|PUSHp|char* str|STRLEN len |
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| 175 | Push a string onto the stack. The stack must have room for this element. |
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| 176 | The C<len> indicates the length of the string. Handles 'set' magic. See |
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| 177 | C<XPUSHp>. |
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| 178 | |
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| 179 | =for apidoc Am|void|PUSHn|NV nv |
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| 180 | Push a double onto the stack. The stack must have room for this element. |
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| 181 | Handles 'set' magic. See C<XPUSHn>. |
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| 182 | |
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| 183 | =for apidoc Am|void|PUSHi|IV iv |
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| 184 | Push an integer onto the stack. The stack must have room for this element. |
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| 185 | Handles 'set' magic. See C<XPUSHi>. |
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| 186 | |
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| 187 | =for apidoc Am|void|PUSHu|UV uv |
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| 188 | Push an unsigned integer onto the stack. The stack must have room for this |
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| 189 | element. See C<XPUSHu>. |
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| 190 | |
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| 191 | =for apidoc Am|void|XPUSHs|SV* sv |
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| 192 | Push an SV onto the stack, extending the stack if necessary. Does not |
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| 193 | handle 'set' magic. See C<PUSHs>. |
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| 194 | |
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| 195 | =for apidoc Am|void|XPUSHp|char* str|STRLEN len |
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| 196 | Push a string onto the stack, extending the stack if necessary. The C<len> |
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| 197 | indicates the length of the string. Handles 'set' magic. See |
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| 198 | C<PUSHp>. |
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| 199 | |
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| 200 | =for apidoc Am|void|XPUSHn|NV nv |
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| 201 | Push a double onto the stack, extending the stack if necessary. Handles |
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| 202 | 'set' magic. See C<PUSHn>. |
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| 203 | |
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| 204 | =for apidoc Am|void|XPUSHi|IV iv |
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| 205 | Push an integer onto the stack, extending the stack if necessary. Handles |
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| 206 | 'set' magic. See C<PUSHi>. |
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| 207 | |
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| 208 | =for apidoc Am|void|XPUSHu|UV uv |
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| 209 | Push an unsigned integer onto the stack, extending the stack if necessary. |
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| 210 | See C<PUSHu>. |
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| 211 | |
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| 212 | =cut |
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| 213 | */ |
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| 214 | |
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| 215 | #define EXTEND(p,n) STMT_START { if (PL_stack_max - p < (n)) { \ |
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| 216 | sp = stack_grow(sp,p, (int) (n)); \ |
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| 217 | } } STMT_END |
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| 218 | |
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| 219 | /* Same thing, but update mark register too. */ |
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| 220 | #define MEXTEND(p,n) STMT_START {if (PL_stack_max - p < (n)) { \ |
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| 221 | int markoff = mark - PL_stack_base; \ |
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| 222 | sp = stack_grow(sp,p,(int) (n)); \ |
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| 223 | mark = PL_stack_base + markoff; \ |
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| 224 | } } STMT_END |
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| 225 | |
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| 226 | #define PUSHs(s) (*++sp = (s)) |
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| 227 | #define PUSHTARG STMT_START { SvSETMAGIC(TARG); PUSHs(TARG); } STMT_END |
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| 228 | #define PUSHp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); PUSHTARG; } STMT_END |
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| 229 | #define PUSHn(n) STMT_START { sv_setnv(TARG, (NV)(n)); PUSHTARG; } STMT_END |
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| 230 | #define PUSHi(i) STMT_START { sv_setiv(TARG, (IV)(i)); PUSHTARG; } STMT_END |
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| 231 | #define PUSHu(u) STMT_START { sv_setuv(TARG, (UV)(u)); PUSHTARG; } STMT_END |
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| 232 | |
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| 233 | #define XPUSHs(s) STMT_START { EXTEND(sp,1); (*++sp = (s)); } STMT_END |
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| 234 | #define XPUSHTARG STMT_START { SvSETMAGIC(TARG); XPUSHs(TARG); } STMT_END |
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| 235 | #define XPUSHp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); XPUSHTARG; } STMT_END |
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| 236 | #define XPUSHn(n) STMT_START { sv_setnv(TARG, (NV)(n)); XPUSHTARG; } STMT_END |
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| 237 | #define XPUSHi(i) STMT_START { sv_setiv(TARG, (IV)(i)); XPUSHTARG; } STMT_END |
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| 238 | #define XPUSHu(u) STMT_START { sv_setuv(TARG, (UV)(u)); XPUSHTARG; } STMT_END |
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| 239 | #define XPUSHundef STMT_START { SvOK_off(TARG); XPUSHs(TARG); } STMT_END |
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| 240 | |
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| 241 | #define SETs(s) (*sp = s) |
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| 242 | #define SETTARG STMT_START { SvSETMAGIC(TARG); SETs(TARG); } STMT_END |
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| 243 | #define SETp(p,l) STMT_START { sv_setpvn(TARG, (p), (l)); SETTARG; } STMT_END |
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| 244 | #define SETn(n) STMT_START { sv_setnv(TARG, (NV)(n)); SETTARG; } STMT_END |
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| 245 | #define SETi(i) STMT_START { sv_setiv(TARG, (IV)(i)); SETTARG; } STMT_END |
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| 246 | #define SETu(u) STMT_START { sv_setuv(TARG, (UV)(u)); SETTARG; } STMT_END |
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| 247 | |
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| 248 | #define dTOPss SV *sv = TOPs |
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| 249 | #define dPOPss SV *sv = POPs |
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| 250 | #define dTOPnv NV value = TOPn |
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| 251 | #define dPOPnv NV value = POPn |
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| 252 | #define dTOPiv IV value = TOPi |
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| 253 | #define dPOPiv IV value = POPi |
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| 254 | #define dTOPuv UV value = TOPu |
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| 255 | #define dPOPuv UV value = POPu |
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| 256 | #ifdef HAS_QUAD |
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| 257 | #define dTOPqv Quad_t value = TOPu |
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| 258 | #define dPOPqv Quad_t value = POPu |
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| 259 | #define dTOPuqv Uquad_t value = TOPuq |
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| 260 | #define dPOPuqv Uquad_t value = POPuq |
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| 261 | #endif |
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| 262 | |
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| 263 | #define dPOPXssrl(X) SV *right = POPs; SV *left = CAT2(X,s) |
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| 264 | #define dPOPXnnrl(X) NV right = POPn; NV left = CAT2(X,n) |
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| 265 | #define dPOPXiirl(X) IV right = POPi; IV left = CAT2(X,i) |
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| 266 | |
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| 267 | #define USE_LEFT(sv) \ |
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| 268 | (SvOK(sv) || SvGMAGICAL(sv) || !(PL_op->op_flags & OPf_STACKED)) |
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| 269 | #define dPOPXnnrl_ul(X) \ |
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| 270 | NV right = POPn; \ |
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| 271 | SV *leftsv = CAT2(X,s); \ |
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| 272 | NV left = USE_LEFT(leftsv) ? SvNV(leftsv) : 0.0 |
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| 273 | #define dPOPXiirl_ul(X) \ |
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| 274 | IV right = POPi; \ |
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| 275 | SV *leftsv = CAT2(X,s); \ |
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| 276 | IV left = USE_LEFT(leftsv) ? SvIV(leftsv) : 0 |
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| 277 | |
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| 278 | #define dPOPPOPssrl dPOPXssrl(POP) |
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| 279 | #define dPOPPOPnnrl dPOPXnnrl(POP) |
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| 280 | #define dPOPPOPnnrl_ul dPOPXnnrl_ul(POP) |
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| 281 | #define dPOPPOPiirl dPOPXiirl(POP) |
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| 282 | #define dPOPPOPiirl_ul dPOPXiirl_ul(POP) |
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| 283 | |
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| 284 | #define dPOPTOPssrl dPOPXssrl(TOP) |
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| 285 | #define dPOPTOPnnrl dPOPXnnrl(TOP) |
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| 286 | #define dPOPTOPnnrl_ul dPOPXnnrl_ul(TOP) |
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| 287 | #define dPOPTOPiirl dPOPXiirl(TOP) |
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| 288 | #define dPOPTOPiirl_ul dPOPXiirl_ul(TOP) |
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| 289 | |
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| 290 | #define RETPUSHYES RETURNX(PUSHs(&PL_sv_yes)) |
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| 291 | #define RETPUSHNO RETURNX(PUSHs(&PL_sv_no)) |
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| 292 | #define RETPUSHUNDEF RETURNX(PUSHs(&PL_sv_undef)) |
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| 293 | |
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| 294 | #define RETSETYES RETURNX(SETs(&PL_sv_yes)) |
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| 295 | #define RETSETNO RETURNX(SETs(&PL_sv_no)) |
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| 296 | #define RETSETUNDEF RETURNX(SETs(&PL_sv_undef)) |
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| 297 | |
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| 298 | #define ARGTARG PL_op->op_targ |
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| 299 | |
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| 300 | /* See OPpTARGET_MY: */ |
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| 301 | #define MAXARG (PL_op->op_private & 15) |
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| 302 | |
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| 303 | #define SWITCHSTACK(f,t) \ |
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| 304 | STMT_START { \ |
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| 305 | AvFILLp(f) = sp - PL_stack_base; \ |
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| 306 | PL_stack_base = AvARRAY(t); \ |
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| 307 | PL_stack_max = PL_stack_base + AvMAX(t); \ |
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| 308 | sp = PL_stack_sp = PL_stack_base + AvFILLp(t); \ |
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| 309 | PL_curstack = t; \ |
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| 310 | } STMT_END |
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| 311 | |
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| 312 | #define EXTEND_MORTAL(n) \ |
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| 313 | STMT_START { \ |
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| 314 | if (PL_tmps_ix + (n) >= PL_tmps_max) \ |
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| 315 | tmps_grow(n); \ |
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| 316 | } STMT_END |
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| 317 | |
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| 318 | #define AMGf_noright 1 |
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| 319 | #define AMGf_noleft 2 |
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| 320 | #define AMGf_assign 4 |
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| 321 | #define AMGf_unary 8 |
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| 322 | |
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| 323 | #define tryAMAGICbinW(meth,assign,set) STMT_START { \ |
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| 324 | if (PL_amagic_generation) { \ |
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| 325 | SV* tmpsv; \ |
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| 326 | SV* right= *(sp); SV* left= *(sp-1);\ |
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| 327 | if ((SvAMAGIC(left)||SvAMAGIC(right))&&\ |
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| 328 | (tmpsv=amagic_call(left, \ |
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| 329 | right, \ |
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| 330 | CAT2(meth,_amg), \ |
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| 331 | (assign)? AMGf_assign: 0))) {\ |
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| 332 | SPAGAIN; \ |
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| 333 | (void)POPs; set(tmpsv); RETURN; } \ |
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| 334 | } \ |
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| 335 | } STMT_END |
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| 336 | |
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| 337 | #define tryAMAGICbin(meth,assign) tryAMAGICbinW(meth,assign,SETsv) |
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| 338 | #define tryAMAGICbinSET(meth,assign) tryAMAGICbinW(meth,assign,SETs) |
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| 339 | |
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| 340 | #define AMG_CALLun(sv,meth) amagic_call(sv,&PL_sv_undef, \ |
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| 341 | CAT2(meth,_amg),AMGf_noright | AMGf_unary) |
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| 342 | #define AMG_CALLbinL(left,right,meth) \ |
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| 343 | amagic_call(left,right,CAT2(meth,_amg),AMGf_noright) |
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| 344 | |
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| 345 | #define tryAMAGICunW(meth,set,shift,ret) STMT_START { \ |
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| 346 | if (PL_amagic_generation) { \ |
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| 347 | SV* tmpsv; \ |
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| 348 | SV* arg= sp[shift]; \ |
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| 349 | if(0) goto am_again; /* shut up unused warning */ \ |
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| 350 | am_again: \ |
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| 351 | if ((SvAMAGIC(arg))&&\ |
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| 352 | (tmpsv=AMG_CALLun(arg,meth))) {\ |
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| 353 | SPAGAIN; if (shift) sp += shift; \ |
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| 354 | set(tmpsv); ret; } \ |
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| 355 | } \ |
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| 356 | } STMT_END |
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| 357 | |
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| 358 | #define FORCE_SETs(sv) STMT_START { sv_setsv(TARG, (sv)); SETTARG; } STMT_END |
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| 359 | |
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| 360 | #define tryAMAGICun(meth) tryAMAGICunW(meth,SETsvUN,0,RETURN) |
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| 361 | #define tryAMAGICunSET(meth) tryAMAGICunW(meth,SETs,0,RETURN) |
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| 362 | #define tryAMAGICunTARGET(meth, shift) \ |
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| 363 | { dSP; sp--; /* get TARGET from below PL_stack_sp */ \ |
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| 364 | { dTARGETSTACKED; \ |
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| 365 | { dSP; tryAMAGICunW(meth,FORCE_SETs,shift,RETURN);}}} |
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| 366 | |
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| 367 | #define setAGAIN(ref) sv = ref; \ |
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| 368 | if (!SvROK(ref)) \ |
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| 369 | Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); \ |
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| 370 | if (ref != arg && SvRV(ref) != SvRV(arg)) { \ |
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| 371 | arg = ref; \ |
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| 372 | goto am_again; \ |
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| 373 | } |
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| 374 | |
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| 375 | #define tryAMAGICunDEREF(meth) tryAMAGICunW(meth,setAGAIN,0,(void)0) |
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| 376 | |
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| 377 | #define opASSIGN (PL_op->op_flags & OPf_STACKED) |
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| 378 | #define SETsv(sv) STMT_START { \ |
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| 379 | if (opASSIGN || (SvFLAGS(TARG) & SVs_PADMY)) \ |
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| 380 | { sv_setsv(TARG, (sv)); SETTARG; } \ |
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| 381 | else SETs(sv); } STMT_END |
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| 382 | |
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| 383 | #define SETsvUN(sv) STMT_START { \ |
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| 384 | if (SvFLAGS(TARG) & SVs_PADMY) \ |
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| 385 | { sv_setsv(TARG, (sv)); SETTARG; } \ |
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| 386 | else SETs(sv); } STMT_END |
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| 387 | |
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| 388 | /* newSVsv does not behave as advertised, so we copy missing |
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| 389 | * information by hand */ |
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| 390 | |
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| 391 | /* SV* ref causes confusion with the member variable |
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| 392 | changed SV* ref to SV* tmpRef */ |
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| 393 | #define RvDEEPCP(rv) STMT_START { SV* tmpRef=SvRV(rv); \ |
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| 394 | if (SvREFCNT(tmpRef)>1) { \ |
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| 395 | SvREFCNT_dec(tmpRef); \ |
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| 396 | SvRV(rv)=AMG_CALLun(rv,copy); \ |
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| 397 | } } STMT_END |
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| 398 | |
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| 399 | /* |
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| 400 | =for apidoc mU||LVRET |
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| 401 | True if this op will be the return value of an lvalue subroutine |
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| 402 | |
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| 403 | =cut */ |
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| 404 | #define LVRET ((PL_op->op_private & OPpMAYBE_LVSUB) && is_lvalue_sub()) |
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