diff options
Diffstat (limited to 'contrib/perl5/cop.h')
| -rw-r--r-- | contrib/perl5/cop.h | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/contrib/perl5/cop.h b/contrib/perl5/cop.h new file mode 100644 index 0000000..9c8eae6 --- /dev/null +++ b/contrib/perl5/cop.h @@ -0,0 +1,368 @@ +/* cop.h + * + * Copyright (c) 1991-1997, Larry Wall + * + * You may distribute under the terms of either the GNU General Public + * License or the Artistic License, as specified in the README file. + * + */ + +struct cop { + BASEOP + char * cop_label; /* label for this construct */ + HV * cop_stash; /* package line was compiled in */ + GV * cop_filegv; /* file the following line # is from */ + U32 cop_seq; /* parse sequence number */ + I32 cop_arybase; /* array base this line was compiled with */ + line_t cop_line; /* line # of this command */ +}; + +#define Nullcop Null(COP*) + +/* + * Here we have some enormously heavy (or at least ponderous) wizardry. + */ + +/* subroutine context */ +struct block_sub { + CV * cv; + GV * gv; + GV * dfoutgv; +#ifndef USE_THREADS + AV * savearray; +#endif /* USE_THREADS */ + AV * argarray; + U16 olddepth; + U8 hasargs; +}; + +#define PUSHSUB(cx) \ + cx->blk_sub.cv = cv; \ + cx->blk_sub.olddepth = CvDEPTH(cv); \ + cx->blk_sub.hasargs = hasargs; + +#define PUSHFORMAT(cx) \ + cx->blk_sub.cv = cv; \ + cx->blk_sub.gv = gv; \ + cx->blk_sub.hasargs = 0; \ + cx->blk_sub.dfoutgv = PL_defoutgv; \ + (void)SvREFCNT_inc(cx->blk_sub.dfoutgv) + +#define POPSUB(cx) \ + { struct block_sub cxsub; \ + POPSUB1(cx); \ + POPSUB2(); } + +#define POPSUB1(cx) \ + cxsub = cx->blk_sub; /* because DESTROY may clobber *cx */ + +#ifdef USE_THREADS +#define POPSAVEARRAY() NOOP +#else +#define POPSAVEARRAY() \ + STMT_START { \ + SvREFCNT_dec(GvAV(PL_defgv)); \ + GvAV(PL_defgv) = cxsub.savearray; \ + } STMT_END +#endif /* USE_THREADS */ + +#define POPSUB2() \ + if (cxsub.hasargs) { \ + POPSAVEARRAY(); \ + /* destroy arg array */ \ + av_clear(cxsub.argarray); \ + AvREAL_off(cxsub.argarray); \ + } \ + if (cxsub.cv) { \ + if (!(CvDEPTH(cxsub.cv) = cxsub.olddepth)) \ + SvREFCNT_dec(cxsub.cv); \ + } + +#define POPFORMAT(cx) \ + setdefout(cx->blk_sub.dfoutgv); \ + SvREFCNT_dec(cx->blk_sub.dfoutgv); + +/* eval context */ +struct block_eval { + I32 old_in_eval; + I32 old_op_type; + char * old_name; + OP * old_eval_root; + SV * cur_text; +}; + +#define PUSHEVAL(cx,n,fgv) \ + cx->blk_eval.old_in_eval = PL_in_eval; \ + cx->blk_eval.old_op_type = PL_op->op_type; \ + cx->blk_eval.old_name = n; \ + cx->blk_eval.old_eval_root = PL_eval_root; \ + cx->blk_eval.cur_text = PL_linestr; + +#define POPEVAL(cx) \ + PL_in_eval = cx->blk_eval.old_in_eval; \ + optype = cx->blk_eval.old_op_type; \ + PL_eval_root = cx->blk_eval.old_eval_root; + +/* loop context */ +struct block_loop { + char * label; + I32 resetsp; + OP * redo_op; + OP * next_op; + OP * last_op; + SV ** itervar; + SV * itersave; + SV * iterlval; + AV * iterary; + IV iterix; + IV itermax; +}; + +#define PUSHLOOP(cx, ivar, s) \ + cx->blk_loop.label = PL_curcop->cop_label; \ + cx->blk_loop.resetsp = s - PL_stack_base; \ + cx->blk_loop.redo_op = cLOOP->op_redoop; \ + cx->blk_loop.next_op = cLOOP->op_nextop; \ + cx->blk_loop.last_op = cLOOP->op_lastop; \ + if (cx->blk_loop.itervar = (ivar)) \ + cx->blk_loop.itersave = SvREFCNT_inc(*cx->blk_loop.itervar);\ + cx->blk_loop.iterlval = Nullsv; \ + cx->blk_loop.iterary = Nullav; \ + cx->blk_loop.iterix = -1; + +#define POPLOOP(cx) \ + { struct block_loop cxloop; \ + POPLOOP1(cx); \ + POPLOOP2(); } + +#define POPLOOP1(cx) \ + cxloop = cx->blk_loop; /* because DESTROY may clobber *cx */ \ + newsp = PL_stack_base + cxloop.resetsp; + +#define POPLOOP2() \ + SvREFCNT_dec(cxloop.iterlval); \ + if (cxloop.itervar) { \ + SvREFCNT_dec(*cxloop.itervar); \ + *cxloop.itervar = cxloop.itersave; \ + } \ + if (cxloop.iterary && cxloop.iterary != PL_curstack) \ + SvREFCNT_dec(cxloop.iterary); + +/* context common to subroutines, evals and loops */ +struct block { + I32 blku_oldsp; /* stack pointer to copy stuff down to */ + COP * blku_oldcop; /* old curcop pointer */ + I32 blku_oldretsp; /* return stack index */ + I32 blku_oldmarksp; /* mark stack index */ + I32 blku_oldscopesp; /* scope stack index */ + PMOP * blku_oldpm; /* values of pattern match vars */ + U8 blku_gimme; /* is this block running in list context? */ + + union { + struct block_sub blku_sub; + struct block_eval blku_eval; + struct block_loop blku_loop; + } blk_u; +}; +#define blk_oldsp cx_u.cx_blk.blku_oldsp +#define blk_oldcop cx_u.cx_blk.blku_oldcop +#define blk_oldretsp cx_u.cx_blk.blku_oldretsp +#define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp +#define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp +#define blk_oldpm cx_u.cx_blk.blku_oldpm +#define blk_gimme cx_u.cx_blk.blku_gimme +#define blk_sub cx_u.cx_blk.blk_u.blku_sub +#define blk_eval cx_u.cx_blk.blk_u.blku_eval +#define blk_loop cx_u.cx_blk.blk_u.blku_loop + +/* Enter a block. */ +#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ + cx->cx_type = t, \ + cx->blk_oldsp = sp - PL_stack_base, \ + cx->blk_oldcop = PL_curcop, \ + cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ + cx->blk_oldscopesp = PL_scopestack_ix, \ + cx->blk_oldretsp = PL_retstack_ix, \ + cx->blk_oldpm = PL_curpm, \ + cx->blk_gimme = gimme; \ + DEBUG_l( PerlIO_printf(PerlIO_stderr(), "Entering block %ld, type %s\n", \ + (long)cxstack_ix, block_type[t]); ) + +/* Exit a block (RETURN and LAST). */ +#define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \ + newsp = PL_stack_base + cx->blk_oldsp, \ + PL_curcop = cx->blk_oldcop, \ + PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ + PL_scopestack_ix = cx->blk_oldscopesp, \ + PL_retstack_ix = cx->blk_oldretsp, \ + pm = cx->blk_oldpm, \ + gimme = cx->blk_gimme; \ + DEBUG_l( PerlIO_printf(PerlIO_stderr(), "Leaving block %ld, type %s\n", \ + (long)cxstack_ix+1,block_type[cx->cx_type]); ) + +/* Continue a block elsewhere (NEXT and REDO). */ +#define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \ + PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ + PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ + PL_scopestack_ix = cx->blk_oldscopesp, \ + PL_retstack_ix = cx->blk_oldretsp + +/* substitution context */ +struct subst { + I32 sbu_iters; + I32 sbu_maxiters; + I32 sbu_safebase; + I32 sbu_oldsave; + bool sbu_once; + bool sbu_rxtainted; + char * sbu_orig; + SV * sbu_dstr; + SV * sbu_targ; + char * sbu_s; + char * sbu_m; + char * sbu_strend; + void * sbu_rxres; + REGEXP * sbu_rx; +}; +#define sb_iters cx_u.cx_subst.sbu_iters +#define sb_maxiters cx_u.cx_subst.sbu_maxiters +#define sb_safebase cx_u.cx_subst.sbu_safebase +#define sb_oldsave cx_u.cx_subst.sbu_oldsave +#define sb_once cx_u.cx_subst.sbu_once +#define sb_rxtainted cx_u.cx_subst.sbu_rxtainted +#define sb_orig cx_u.cx_subst.sbu_orig +#define sb_dstr cx_u.cx_subst.sbu_dstr +#define sb_targ cx_u.cx_subst.sbu_targ +#define sb_s cx_u.cx_subst.sbu_s +#define sb_m cx_u.cx_subst.sbu_m +#define sb_strend cx_u.cx_subst.sbu_strend +#define sb_rxres cx_u.cx_subst.sbu_rxres +#define sb_rx cx_u.cx_subst.sbu_rx + +#define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ + cx->sb_iters = iters, \ + cx->sb_maxiters = maxiters, \ + cx->sb_safebase = safebase, \ + cx->sb_oldsave = oldsave, \ + cx->sb_once = once, \ + cx->sb_rxtainted = rxtainted, \ + cx->sb_orig = orig, \ + cx->sb_dstr = dstr, \ + cx->sb_targ = targ, \ + cx->sb_s = s, \ + cx->sb_m = m, \ + cx->sb_strend = strend, \ + cx->sb_rxres = Null(void*), \ + cx->sb_rx = rx, \ + cx->cx_type = CXt_SUBST; \ + rxres_save(&cx->sb_rxres, rx) + +#define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ + rxres_free(&cx->sb_rxres) + +struct context { + I32 cx_type; /* what kind of context this is */ + union { + struct block cx_blk; + struct subst cx_subst; + } cx_u; +}; +#define CXt_NULL 0 +#define CXt_SUB 1 +#define CXt_EVAL 2 +#define CXt_LOOP 3 +#define CXt_SUBST 4 +#define CXt_BLOCK 5 + +#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) + +/* "gimme" values */ +#define G_SCALAR 0 +#define G_ARRAY 1 +#define G_VOID 128 /* skip this bit when adding flags below */ + +/* extra flags for perl_call_* routines */ +#define G_DISCARD 2 /* Call FREETMPS. */ +#define G_EVAL 4 /* Assume eval {} around subroutine call. */ +#define G_NOARGS 8 /* Don't construct a @_ array. */ +#define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */ +#define G_NODEBUG 32 /* Disable debugging at toplevel. */ + +/* Support for switching (stack and block) contexts. + * This ensures magic doesn't invalidate local stack and cx pointers. + */ + +#define PERLSI_UNKNOWN -1 +#define PERLSI_UNDEF 0 +#define PERLSI_MAIN 1 +#define PERLSI_MAGIC 2 +#define PERLSI_SORT 3 +#define PERLSI_SIGNAL 4 +#define PERLSI_OVERLOAD 5 +#define PERLSI_DESTROY 6 +#define PERLSI_WARNHOOK 7 +#define PERLSI_DIEHOOK 8 +#define PERLSI_REQUIRE 9 + +struct stackinfo { + AV * si_stack; /* stack for current runlevel */ + PERL_CONTEXT * si_cxstack; /* context stack for runlevel */ + I32 si_cxix; /* current context index */ + I32 si_cxmax; /* maximum allocated index */ + I32 si_type; /* type of runlevel */ + struct stackinfo * si_prev; + struct stackinfo * si_next; + I32 * si_markbase; /* where markstack begins for us. + * currently used only with DEBUGGING, + * but not #ifdef-ed for bincompat */ +}; + +typedef struct stackinfo PERL_SI; + +#define cxstack (PL_curstackinfo->si_cxstack) +#define cxstack_ix (PL_curstackinfo->si_cxix) +#define cxstack_max (PL_curstackinfo->si_cxmax) + +#ifdef DEBUGGING +# define SET_MARKBASE PL_curstackinfo->si_markbase = PL_markstack_ptr +#else +# define SET_MARKBASE NOOP +#endif + +#define PUSHSTACKi(type) \ + STMT_START { \ + PERL_SI *next = PL_curstackinfo->si_next; \ + if (!next) { \ + next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \ + next->si_prev = PL_curstackinfo; \ + PL_curstackinfo->si_next = next; \ + } \ + next->si_type = type; \ + next->si_cxix = -1; \ + AvFILLp(next->si_stack) = 0; \ + SWITCHSTACK(PL_curstack,next->si_stack); \ + PL_curstackinfo = next; \ + SET_MARKBASE; \ + } STMT_END + +#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN) + +#define POPSTACK \ + STMT_START { \ + PERL_SI *prev = PL_curstackinfo->si_prev; \ + if (!prev) { \ + PerlIO_printf(PerlIO_stderr(), "panic: POPSTACK\n"); \ + my_exit(1); \ + } \ + SWITCHSTACK(PL_curstack,prev->si_stack); \ + /* don't free prev here, free them all at the END{} */ \ + PL_curstackinfo = prev; \ + } STMT_END + +#define POPSTACK_TO(s) \ + STMT_START { \ + while (PL_curstack != s) { \ + dounwind(-1); \ + POPSTACK; \ + } \ + } STMT_END |
