| 1 | /* cop.h |
| 2 | * |
| 3 | * Copyright (c) 1991-2002, 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 | * Control ops (cops) are one of the three ops OP_NEXTSTATE, OP_DBSTATE, |
| 9 | * and OP_SETSTATE that (loosely speaking) separate statements. They hold |
| 10 | * imformation important for lexical state and error reporting. At run |
| 11 | * time, PL_curcop is set to point to the most recently executed cop, |
| 12 | * and thus can be used to determine our current state. |
| 13 | */ |
| 14 | |
| 15 | struct cop { |
| 16 | BASEOP |
| 17 | char * cop_label; /* label for this construct */ |
| 18 | #ifdef USE_ITHREADS |
| 19 | char * cop_stashpv; /* package line was compiled in */ |
| 20 | char * cop_file; /* file name the following line # is from */ |
| 21 | #else |
| 22 | HV * cop_stash; /* package line was compiled in */ |
| 23 | GV * cop_filegv; /* file the following line # is from */ |
| 24 | #endif |
| 25 | U32 cop_seq; /* parse sequence number */ |
| 26 | I32 cop_arybase; /* array base this line was compiled with */ |
| 27 | line_t cop_line; /* line # of this command */ |
| 28 | SV * cop_warnings; /* lexical warnings bitmask */ |
| 29 | SV * cop_io; /* lexical IO defaults */ |
| 30 | }; |
| 31 | |
| 32 | #define Nullcop Null(COP*) |
| 33 | |
| 34 | #ifdef USE_ITHREADS |
| 35 | # define CopFILE(c) ((c)->cop_file) |
| 36 | # define CopFILEGV(c) (CopFILE(c) \ |
| 37 | ? gv_fetchfile(CopFILE(c)) : Nullgv) |
| 38 | |
| 39 | #ifdef NETWARE |
| 40 | #define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) |
| 41 | #else |
| 42 | #define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv)) |
| 43 | #endif |
| 44 | |
| 45 | # define CopFILESV(c) (CopFILE(c) \ |
| 46 | ? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv) |
| 47 | # define CopFILEAV(c) (CopFILE(c) \ |
| 48 | ? GvAV(gv_fetchfile(CopFILE(c))) : Nullav) |
| 49 | # define CopSTASHPV(c) ((c)->cop_stashpv) |
| 50 | |
| 51 | #ifdef NETWARE |
| 52 | #define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : Nullch)) |
| 53 | #else |
| 54 | #define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv)) |
| 55 | #endif |
| 56 | |
| 57 | # define CopSTASH(c) (CopSTASHPV(c) \ |
| 58 | ? gv_stashpv(CopSTASHPV(c),GV_ADD) : Nullhv) |
| 59 | # define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME(hv) : Nullch) |
| 60 | # define CopSTASH_eq(c,hv) ((hv) \ |
| 61 | && (CopSTASHPV(c) == HvNAME(hv) \ |
| 62 | || (CopSTASHPV(c) && HvNAME(hv) \ |
| 63 | && strEQ(CopSTASHPV(c), HvNAME(hv))))) |
| 64 | #ifdef NETWARE |
| 65 | #define CopSTASH_free(c) SAVECOPSTASH_FREE(c) |
| 66 | #else |
| 67 | #define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c)) |
| 68 | #endif |
| 69 | |
| 70 | #ifdef NETWARE |
| 71 | #define CopFILE_free(c) SAVECOPFILE_FREE(c) |
| 72 | #else |
| 73 | #define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = Nullch)) |
| 74 | #endif |
| 75 | #else |
| 76 | # define CopFILEGV(c) ((c)->cop_filegv) |
| 77 | # define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv)) |
| 78 | # define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv)) |
| 79 | # define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : Nullsv) |
| 80 | # define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : Nullav) |
| 81 | # define CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : Nullch) |
| 82 | # define CopSTASH(c) ((c)->cop_stash) |
| 83 | # define CopSTASH_set(c,hv) ((c)->cop_stash = (hv)) |
| 84 | # define CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch) |
| 85 | /* cop_stash is not refcounted */ |
| 86 | # define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD)) |
| 87 | # define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv)) |
| 88 | # define CopSTASH_free(c) |
| 89 | # define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = Nullgv)) |
| 90 | |
| 91 | #endif /* USE_ITHREADS */ |
| 92 | |
| 93 | #define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv)) |
| 94 | #define CopLINE(c) ((c)->cop_line) |
| 95 | #define CopLINE_inc(c) (++CopLINE(c)) |
| 96 | #define CopLINE_dec(c) (--CopLINE(c)) |
| 97 | #define CopLINE_set(c,l) (CopLINE(c) = (l)) |
| 98 | |
| 99 | /* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */ |
| 100 | #ifdef MACOS_TRADITIONAL |
| 101 | # define OutCopFILE(c) MacPerl_MPWFileName(CopFILE(c)) |
| 102 | #else |
| 103 | # define OutCopFILE(c) CopFILE(c) |
| 104 | #endif |
| 105 | |
| 106 | /* |
| 107 | * Here we have some enormously heavy (or at least ponderous) wizardry. |
| 108 | */ |
| 109 | |
| 110 | /* subroutine context */ |
| 111 | struct block_sub { |
| 112 | CV * cv; |
| 113 | GV * gv; |
| 114 | GV * dfoutgv; |
| 115 | AV * savearray; |
| 116 | AV * argarray; |
| 117 | long olddepth; |
| 118 | U8 hasargs; |
| 119 | U8 lval; /* XXX merge lval and hasargs? */ |
| 120 | PAD *oldcomppad; |
| 121 | }; |
| 122 | |
| 123 | #define PUSHSUB(cx) \ |
| 124 | cx->blk_sub.cv = cv; \ |
| 125 | cx->blk_sub.olddepth = CvDEPTH(cv); \ |
| 126 | cx->blk_sub.hasargs = hasargs; \ |
| 127 | cx->blk_sub.lval = PL_op->op_private & \ |
| 128 | (OPpLVAL_INTRO|OPpENTERSUB_INARGS); |
| 129 | |
| 130 | #define PUSHFORMAT(cx) \ |
| 131 | cx->blk_sub.cv = cv; \ |
| 132 | cx->blk_sub.gv = gv; \ |
| 133 | cx->blk_sub.hasargs = 0; \ |
| 134 | cx->blk_sub.dfoutgv = PL_defoutgv; \ |
| 135 | (void)SvREFCNT_inc(cx->blk_sub.dfoutgv) |
| 136 | |
| 137 | #define POP_SAVEARRAY() \ |
| 138 | STMT_START { \ |
| 139 | SvREFCNT_dec(GvAV(PL_defgv)); \ |
| 140 | GvAV(PL_defgv) = cx->blk_sub.savearray; \ |
| 141 | } STMT_END |
| 142 | |
| 143 | /* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't |
| 144 | * leave any (a fast av_clear(ary), basically) */ |
| 145 | #define CLEAR_ARGARRAY(ary) \ |
| 146 | STMT_START { \ |
| 147 | AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \ |
| 148 | SvPVX(ary) = (char*)AvALLOC(ary); \ |
| 149 | AvFILLp(ary) = -1; \ |
| 150 | } STMT_END |
| 151 | |
| 152 | #define POPSUB(cx,sv) \ |
| 153 | STMT_START { \ |
| 154 | if (cx->blk_sub.hasargs) { \ |
| 155 | POP_SAVEARRAY(); \ |
| 156 | /* abandon @_ if it got reified */ \ |
| 157 | if (AvREAL(cx->blk_sub.argarray)) { \ |
| 158 | SSize_t fill = AvFILLp(cx->blk_sub.argarray); \ |
| 159 | SvREFCNT_dec(cx->blk_sub.argarray); \ |
| 160 | cx->blk_sub.argarray = newAV(); \ |
| 161 | av_extend(cx->blk_sub.argarray, fill); \ |
| 162 | AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY; \ |
| 163 | CX_CURPAD_SV(cx->blk_sub, 0) = (SV*)cx->blk_sub.argarray; \ |
| 164 | } \ |
| 165 | else { \ |
| 166 | CLEAR_ARGARRAY(cx->blk_sub.argarray); \ |
| 167 | } \ |
| 168 | } \ |
| 169 | sv = (SV*)cx->blk_sub.cv; \ |
| 170 | if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \ |
| 171 | sv = Nullsv; \ |
| 172 | } STMT_END |
| 173 | |
| 174 | #define LEAVESUB(sv) \ |
| 175 | STMT_START { \ |
| 176 | if (sv) \ |
| 177 | SvREFCNT_dec(sv); \ |
| 178 | } STMT_END |
| 179 | |
| 180 | #define POPFORMAT(cx) \ |
| 181 | setdefout(cx->blk_sub.dfoutgv); \ |
| 182 | SvREFCNT_dec(cx->blk_sub.dfoutgv); |
| 183 | |
| 184 | /* eval context */ |
| 185 | struct block_eval { |
| 186 | I32 old_in_eval; |
| 187 | I32 old_op_type; |
| 188 | SV * old_namesv; |
| 189 | OP * old_eval_root; |
| 190 | SV * cur_text; |
| 191 | CV * cv; |
| 192 | }; |
| 193 | |
| 194 | #define PUSHEVAL(cx,n,fgv) \ |
| 195 | STMT_START { \ |
| 196 | cx->blk_eval.old_in_eval = PL_in_eval; \ |
| 197 | cx->blk_eval.old_op_type = PL_op->op_type; \ |
| 198 | cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : Nullsv); \ |
| 199 | cx->blk_eval.old_eval_root = PL_eval_root; \ |
| 200 | cx->blk_eval.cur_text = PL_linestr; \ |
| 201 | cx->blk_eval.cv = Nullcv; /* set by doeval(), as applicable */ \ |
| 202 | } STMT_END |
| 203 | |
| 204 | #define POPEVAL(cx) \ |
| 205 | STMT_START { \ |
| 206 | PL_in_eval = cx->blk_eval.old_in_eval; \ |
| 207 | optype = cx->blk_eval.old_op_type; \ |
| 208 | PL_eval_root = cx->blk_eval.old_eval_root; \ |
| 209 | if (cx->blk_eval.old_namesv) \ |
| 210 | sv_2mortal(cx->blk_eval.old_namesv); \ |
| 211 | } STMT_END |
| 212 | |
| 213 | /* loop context */ |
| 214 | struct block_loop { |
| 215 | char * label; |
| 216 | I32 resetsp; |
| 217 | OP * redo_op; |
| 218 | OP * next_op; |
| 219 | OP * last_op; |
| 220 | #ifdef USE_ITHREADS |
| 221 | void * iterdata; |
| 222 | PAD *oldcomppad; |
| 223 | #else |
| 224 | SV ** itervar; |
| 225 | #endif |
| 226 | SV * itersave; |
| 227 | SV * iterlval; |
| 228 | AV * iterary; |
| 229 | IV iterix; |
| 230 | IV itermax; |
| 231 | }; |
| 232 | |
| 233 | #ifdef USE_ITHREADS |
| 234 | # define CxITERVAR(c) \ |
| 235 | ((c)->blk_loop.iterdata \ |
| 236 | ? (CxPADLOOP(cx) \ |
| 237 | ? &CX_CURPAD_SV( (c)->blk_loop, \ |
| 238 | INT2PTR(PADOFFSET, (c)->blk_loop.iterdata)) \ |
| 239 | : &GvSV((GV*)(c)->blk_loop.iterdata)) \ |
| 240 | : (SV**)NULL) |
| 241 | # define CX_ITERDATA_SET(cx,idata) \ |
| 242 | CX_CURPAD_SAVE(cx->blk_loop); \ |
| 243 | if ((cx->blk_loop.iterdata = (idata))) \ |
| 244 | cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \ |
| 245 | else \ |
| 246 | cx->blk_loop.itersave = Nullsv; |
| 247 | #else |
| 248 | # define CxITERVAR(c) ((c)->blk_loop.itervar) |
| 249 | # define CX_ITERDATA_SET(cx,ivar) \ |
| 250 | if ((cx->blk_loop.itervar = (SV**)(ivar))) \ |
| 251 | cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \ |
| 252 | else \ |
| 253 | cx->blk_loop.itersave = Nullsv; |
| 254 | #endif |
| 255 | |
| 256 | #define PUSHLOOP(cx, dat, s) \ |
| 257 | cx->blk_loop.label = PL_curcop->cop_label; \ |
| 258 | cx->blk_loop.resetsp = s - PL_stack_base; \ |
| 259 | cx->blk_loop.redo_op = cLOOP->op_redoop; \ |
| 260 | cx->blk_loop.next_op = cLOOP->op_nextop; \ |
| 261 | cx->blk_loop.last_op = cLOOP->op_lastop; \ |
| 262 | cx->blk_loop.iterlval = Nullsv; \ |
| 263 | cx->blk_loop.iterary = Nullav; \ |
| 264 | cx->blk_loop.iterix = -1; \ |
| 265 | CX_ITERDATA_SET(cx,dat); |
| 266 | |
| 267 | #define POPLOOP(cx) \ |
| 268 | SvREFCNT_dec(cx->blk_loop.iterlval); \ |
| 269 | if (CxITERVAR(cx)) { \ |
| 270 | SV **s_v_p = CxITERVAR(cx); \ |
| 271 | sv_2mortal(*s_v_p); \ |
| 272 | *s_v_p = cx->blk_loop.itersave; \ |
| 273 | } \ |
| 274 | if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\ |
| 275 | SvREFCNT_dec(cx->blk_loop.iterary); |
| 276 | |
| 277 | /* context common to subroutines, evals and loops */ |
| 278 | struct block { |
| 279 | I32 blku_oldsp; /* stack pointer to copy stuff down to */ |
| 280 | COP * blku_oldcop; /* old curcop pointer */ |
| 281 | I32 blku_oldretsp; /* return stack index */ |
| 282 | I32 blku_oldmarksp; /* mark stack index */ |
| 283 | I32 blku_oldscopesp; /* scope stack index */ |
| 284 | PMOP * blku_oldpm; /* values of pattern match vars */ |
| 285 | U8 blku_gimme; /* is this block running in list context? */ |
| 286 | |
| 287 | union { |
| 288 | struct block_sub blku_sub; |
| 289 | struct block_eval blku_eval; |
| 290 | struct block_loop blku_loop; |
| 291 | } blk_u; |
| 292 | }; |
| 293 | #define blk_oldsp cx_u.cx_blk.blku_oldsp |
| 294 | #define blk_oldcop cx_u.cx_blk.blku_oldcop |
| 295 | #define blk_oldretsp cx_u.cx_blk.blku_oldretsp |
| 296 | #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp |
| 297 | #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp |
| 298 | #define blk_oldpm cx_u.cx_blk.blku_oldpm |
| 299 | #define blk_gimme cx_u.cx_blk.blku_gimme |
| 300 | #define blk_sub cx_u.cx_blk.blk_u.blku_sub |
| 301 | #define blk_eval cx_u.cx_blk.blk_u.blku_eval |
| 302 | #define blk_loop cx_u.cx_blk.blk_u.blku_loop |
| 303 | |
| 304 | /* Enter a block. */ |
| 305 | #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ |
| 306 | cx->cx_type = t, \ |
| 307 | cx->blk_oldsp = sp - PL_stack_base, \ |
| 308 | cx->blk_oldcop = PL_curcop, \ |
| 309 | cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ |
| 310 | cx->blk_oldscopesp = PL_scopestack_ix, \ |
| 311 | cx->blk_oldretsp = PL_retstack_ix, \ |
| 312 | cx->blk_oldpm = PL_curpm, \ |
| 313 | cx->blk_gimme = (U8)gimme; \ |
| 314 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \ |
| 315 | (long)cxstack_ix, PL_block_type[CxTYPE(cx)]); ) |
| 316 | |
| 317 | /* Exit a block (RETURN and LAST). */ |
| 318 | #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \ |
| 319 | newsp = PL_stack_base + cx->blk_oldsp, \ |
| 320 | PL_curcop = cx->blk_oldcop, \ |
| 321 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
| 322 | PL_scopestack_ix = cx->blk_oldscopesp, \ |
| 323 | PL_retstack_ix = cx->blk_oldretsp, \ |
| 324 | pm = cx->blk_oldpm, \ |
| 325 | gimme = cx->blk_gimme; \ |
| 326 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \ |
| 327 | (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); ) |
| 328 | |
| 329 | /* Continue a block elsewhere (NEXT and REDO). */ |
| 330 | #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \ |
| 331 | PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ |
| 332 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
| 333 | PL_scopestack_ix = cx->blk_oldscopesp, \ |
| 334 | PL_retstack_ix = cx->blk_oldretsp, \ |
| 335 | PL_curpm = cx->blk_oldpm |
| 336 | |
| 337 | /* substitution context */ |
| 338 | struct subst { |
| 339 | I32 sbu_iters; |
| 340 | I32 sbu_maxiters; |
| 341 | I32 sbu_rflags; |
| 342 | I32 sbu_oldsave; |
| 343 | bool sbu_once; |
| 344 | bool sbu_rxtainted; |
| 345 | char * sbu_orig; |
| 346 | SV * sbu_dstr; |
| 347 | SV * sbu_targ; |
| 348 | char * sbu_s; |
| 349 | char * sbu_m; |
| 350 | char * sbu_strend; |
| 351 | void * sbu_rxres; |
| 352 | REGEXP * sbu_rx; |
| 353 | }; |
| 354 | #define sb_iters cx_u.cx_subst.sbu_iters |
| 355 | #define sb_maxiters cx_u.cx_subst.sbu_maxiters |
| 356 | #define sb_rflags cx_u.cx_subst.sbu_rflags |
| 357 | #define sb_oldsave cx_u.cx_subst.sbu_oldsave |
| 358 | #define sb_once cx_u.cx_subst.sbu_once |
| 359 | #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted |
| 360 | #define sb_orig cx_u.cx_subst.sbu_orig |
| 361 | #define sb_dstr cx_u.cx_subst.sbu_dstr |
| 362 | #define sb_targ cx_u.cx_subst.sbu_targ |
| 363 | #define sb_s cx_u.cx_subst.sbu_s |
| 364 | #define sb_m cx_u.cx_subst.sbu_m |
| 365 | #define sb_strend cx_u.cx_subst.sbu_strend |
| 366 | #define sb_rxres cx_u.cx_subst.sbu_rxres |
| 367 | #define sb_rx cx_u.cx_subst.sbu_rx |
| 368 | |
| 369 | #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ |
| 370 | cx->sb_iters = iters, \ |
| 371 | cx->sb_maxiters = maxiters, \ |
| 372 | cx->sb_rflags = r_flags, \ |
| 373 | cx->sb_oldsave = oldsave, \ |
| 374 | cx->sb_once = once, \ |
| 375 | cx->sb_rxtainted = rxtainted, \ |
| 376 | cx->sb_orig = orig, \ |
| 377 | cx->sb_dstr = dstr, \ |
| 378 | cx->sb_targ = targ, \ |
| 379 | cx->sb_s = s, \ |
| 380 | cx->sb_m = m, \ |
| 381 | cx->sb_strend = strend, \ |
| 382 | cx->sb_rxres = Null(void*), \ |
| 383 | cx->sb_rx = rx, \ |
| 384 | cx->cx_type = CXt_SUBST; \ |
| 385 | rxres_save(&cx->sb_rxres, rx) |
| 386 | |
| 387 | #define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ |
| 388 | rxres_free(&cx->sb_rxres) |
| 389 | |
| 390 | struct context { |
| 391 | U32 cx_type; /* what kind of context this is */ |
| 392 | union { |
| 393 | struct block cx_blk; |
| 394 | struct subst cx_subst; |
| 395 | } cx_u; |
| 396 | }; |
| 397 | |
| 398 | #define CXTYPEMASK 0xff |
| 399 | #define CXt_NULL 0 |
| 400 | #define CXt_SUB 1 |
| 401 | #define CXt_EVAL 2 |
| 402 | #define CXt_LOOP 3 |
| 403 | #define CXt_SUBST 4 |
| 404 | #define CXt_BLOCK 5 |
| 405 | #define CXt_FORMAT 6 |
| 406 | |
| 407 | /* private flags for CXt_EVAL */ |
| 408 | #define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */ |
| 409 | #define CXp_TRYBLOCK 0x00000200 /* eval{}, not eval'' or similar */ |
| 410 | |
| 411 | #ifdef USE_ITHREADS |
| 412 | /* private flags for CXt_LOOP */ |
| 413 | # define CXp_PADVAR 0x00000100 /* itervar lives on pad, iterdata |
| 414 | has pad offset; if not set, |
| 415 | iterdata holds GV* */ |
| 416 | # define CxPADLOOP(c) (((c)->cx_type & (CXt_LOOP|CXp_PADVAR)) \ |
| 417 | == (CXt_LOOP|CXp_PADVAR)) |
| 418 | #endif |
| 419 | |
| 420 | #define CxTYPE(c) ((c)->cx_type & CXTYPEMASK) |
| 421 | #define CxREALEVAL(c) (((c)->cx_type & (CXt_EVAL|CXp_REAL)) \ |
| 422 | == (CXt_EVAL|CXp_REAL)) |
| 423 | #define CxTRYBLOCK(c) (((c)->cx_type & (CXt_EVAL|CXp_TRYBLOCK)) \ |
| 424 | == (CXt_EVAL|CXp_TRYBLOCK)) |
| 425 | |
| 426 | #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) |
| 427 | |
| 428 | /* |
| 429 | =head1 "Gimme" Values |
| 430 | */ |
| 431 | |
| 432 | /* |
| 433 | =for apidoc AmU||G_SCALAR |
| 434 | Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and |
| 435 | L<perlcall>. |
| 436 | |
| 437 | =for apidoc AmU||G_ARRAY |
| 438 | Used to indicate list context. See C<GIMME_V>, C<GIMME> and |
| 439 | L<perlcall>. |
| 440 | |
| 441 | =for apidoc AmU||G_VOID |
| 442 | Used to indicate void context. See C<GIMME_V> and L<perlcall>. |
| 443 | |
| 444 | =for apidoc AmU||G_DISCARD |
| 445 | Indicates that arguments returned from a callback should be discarded. See |
| 446 | L<perlcall>. |
| 447 | |
| 448 | =for apidoc AmU||G_EVAL |
| 449 | |
| 450 | Used to force a Perl C<eval> wrapper around a callback. See |
| 451 | L<perlcall>. |
| 452 | |
| 453 | =for apidoc AmU||G_NOARGS |
| 454 | |
| 455 | Indicates that no arguments are being sent to a callback. See |
| 456 | L<perlcall>. |
| 457 | |
| 458 | =cut |
| 459 | */ |
| 460 | |
| 461 | #define G_SCALAR 0 |
| 462 | #define G_ARRAY 1 |
| 463 | #define G_VOID 128 /* skip this bit when adding flags below */ |
| 464 | |
| 465 | /* extra flags for Perl_call_* routines */ |
| 466 | #define G_DISCARD 2 /* Call FREETMPS. */ |
| 467 | #define G_EVAL 4 /* Assume eval {} around subroutine call. */ |
| 468 | #define G_NOARGS 8 /* Don't construct a @_ array. */ |
| 469 | #define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */ |
| 470 | #define G_NODEBUG 32 /* Disable debugging at toplevel. */ |
| 471 | #define G_METHOD 64 /* Calling method. */ |
| 472 | |
| 473 | /* flag bits for PL_in_eval */ |
| 474 | #define EVAL_NULL 0 /* not in an eval */ |
| 475 | #define EVAL_INEVAL 1 /* some enclosing scope is an eval */ |
| 476 | #define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */ |
| 477 | #define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */ |
| 478 | #define EVAL_INREQUIRE 8 /* The code is being required. */ |
| 479 | |
| 480 | /* Support for switching (stack and block) contexts. |
| 481 | * This ensures magic doesn't invalidate local stack and cx pointers. |
| 482 | */ |
| 483 | |
| 484 | #define PERLSI_UNKNOWN -1 |
| 485 | #define PERLSI_UNDEF 0 |
| 486 | #define PERLSI_MAIN 1 |
| 487 | #define PERLSI_MAGIC 2 |
| 488 | #define PERLSI_SORT 3 |
| 489 | #define PERLSI_SIGNAL 4 |
| 490 | #define PERLSI_OVERLOAD 5 |
| 491 | #define PERLSI_DESTROY 6 |
| 492 | #define PERLSI_WARNHOOK 7 |
| 493 | #define PERLSI_DIEHOOK 8 |
| 494 | #define PERLSI_REQUIRE 9 |
| 495 | |
| 496 | struct stackinfo { |
| 497 | AV * si_stack; /* stack for current runlevel */ |
| 498 | PERL_CONTEXT * si_cxstack; /* context stack for runlevel */ |
| 499 | I32 si_cxix; /* current context index */ |
| 500 | I32 si_cxmax; /* maximum allocated index */ |
| 501 | I32 si_type; /* type of runlevel */ |
| 502 | struct stackinfo * si_prev; |
| 503 | struct stackinfo * si_next; |
| 504 | I32 si_markoff; /* offset where markstack begins for us. |
| 505 | * currently used only with DEBUGGING, |
| 506 | * but not #ifdef-ed for bincompat */ |
| 507 | }; |
| 508 | |
| 509 | typedef struct stackinfo PERL_SI; |
| 510 | |
| 511 | #define cxstack (PL_curstackinfo->si_cxstack) |
| 512 | #define cxstack_ix (PL_curstackinfo->si_cxix) |
| 513 | #define cxstack_max (PL_curstackinfo->si_cxmax) |
| 514 | |
| 515 | #ifdef DEBUGGING |
| 516 | # define SET_MARK_OFFSET \ |
| 517 | PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack |
| 518 | #else |
| 519 | # define SET_MARK_OFFSET NOOP |
| 520 | #endif |
| 521 | |
| 522 | #define PUSHSTACKi(type) \ |
| 523 | STMT_START { \ |
| 524 | PERL_SI *next = PL_curstackinfo->si_next; \ |
| 525 | if (!next) { \ |
| 526 | next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \ |
| 527 | next->si_prev = PL_curstackinfo; \ |
| 528 | PL_curstackinfo->si_next = next; \ |
| 529 | } \ |
| 530 | next->si_type = type; \ |
| 531 | next->si_cxix = -1; \ |
| 532 | AvFILLp(next->si_stack) = 0; \ |
| 533 | SWITCHSTACK(PL_curstack,next->si_stack); \ |
| 534 | PL_curstackinfo = next; \ |
| 535 | SET_MARK_OFFSET; \ |
| 536 | } STMT_END |
| 537 | |
| 538 | #define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN) |
| 539 | |
| 540 | /* POPSTACK works with PL_stack_sp, so it may need to be bracketed by |
| 541 | * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */ |
| 542 | #define POPSTACK \ |
| 543 | STMT_START { \ |
| 544 | dSP; \ |
| 545 | PERL_SI *prev = PL_curstackinfo->si_prev; \ |
| 546 | if (!prev) { \ |
| 547 | PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \ |
| 548 | my_exit(1); \ |
| 549 | } \ |
| 550 | SWITCHSTACK(PL_curstack,prev->si_stack); \ |
| 551 | /* don't free prev here, free them all at the END{} */ \ |
| 552 | PL_curstackinfo = prev; \ |
| 553 | } STMT_END |
| 554 | |
| 555 | #define POPSTACK_TO(s) \ |
| 556 | STMT_START { \ |
| 557 | while (PL_curstack != s) { \ |
| 558 | dounwind(-1); \ |
| 559 | POPSTACK; \ |
| 560 | } \ |
| 561 | } STMT_END |