| 1 | /* doop.c |
| 2 | * |
| 3 | * Copyright (c) 1991-1997, 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 | /* |
| 11 | * "'So that was the job I felt I had to do when I started,' thought Sam." |
| 12 | */ |
| 13 | |
| 14 | #include "EXTERN.h" |
| 15 | #include "perl.h" |
| 16 | |
| 17 | #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX) |
| 18 | #include <signal.h> |
| 19 | #endif |
| 20 | |
| 21 | I32 |
| 22 | do_trans(SV *sv, OP *arg) |
| 23 | { |
| 24 | dTHR; |
| 25 | register short *tbl; |
| 26 | register U8 *s; |
| 27 | register U8 *send; |
| 28 | register U8 *d; |
| 29 | register I32 ch; |
| 30 | register I32 matches = 0; |
| 31 | register I32 squash = PL_op->op_private & OPpTRANS_SQUASH; |
| 32 | register U8 *p; |
| 33 | STRLEN len; |
| 34 | |
| 35 | if (SvREADONLY(sv) && !(PL_op->op_private & OPpTRANS_COUNTONLY)) |
| 36 | croak(no_modify); |
| 37 | tbl = (short*)cPVOP->op_pv; |
| 38 | s = (U8*)SvPV(sv, len); |
| 39 | if (!len) |
| 40 | return 0; |
| 41 | if (!SvPOKp(sv)) |
| 42 | s = (U8*)SvPV_force(sv, len); |
| 43 | (void)SvPOK_only(sv); |
| 44 | send = s + len; |
| 45 | if (!tbl || !s) |
| 46 | croak("panic: do_trans"); |
| 47 | DEBUG_t( deb("2.TBL\n")); |
| 48 | if (!PL_op->op_private) { |
| 49 | while (s < send) { |
| 50 | if ((ch = tbl[*s]) >= 0) { |
| 51 | matches++; |
| 52 | *s = ch; |
| 53 | } |
| 54 | s++; |
| 55 | } |
| 56 | SvSETMAGIC(sv); |
| 57 | } |
| 58 | else if (PL_op->op_private & OPpTRANS_COUNTONLY) { |
| 59 | while (s < send) { |
| 60 | if (tbl[*s] >= 0) |
| 61 | matches++; |
| 62 | s++; |
| 63 | } |
| 64 | } |
| 65 | else { |
| 66 | d = s; |
| 67 | p = send; |
| 68 | while (s < send) { |
| 69 | if ((ch = tbl[*s]) >= 0) { |
| 70 | *d = ch; |
| 71 | matches++; |
| 72 | if (squash) { |
| 73 | if (p == d - 1 && *p == *d) |
| 74 | matches--; |
| 75 | else |
| 76 | p = d++; |
| 77 | } |
| 78 | else |
| 79 | d++; |
| 80 | } |
| 81 | else if (ch == -1) /* -1 is unmapped character */ |
| 82 | *d++ = *s; /* -2 is delete character */ |
| 83 | s++; |
| 84 | } |
| 85 | matches += send - d; /* account for disappeared chars */ |
| 86 | *d = '\0'; |
| 87 | SvCUR_set(sv, d - (U8*)SvPVX(sv)); |
| 88 | SvSETMAGIC(sv); |
| 89 | } |
| 90 | return matches; |
| 91 | } |
| 92 | |
| 93 | void |
| 94 | do_join(register SV *sv, SV *del, register SV **mark, register SV **sp) |
| 95 | { |
| 96 | SV **oldmark = mark; |
| 97 | register I32 items = sp - mark; |
| 98 | register STRLEN len; |
| 99 | STRLEN delimlen; |
| 100 | register char *delim = SvPV(del, delimlen); |
| 101 | STRLEN tmplen; |
| 102 | |
| 103 | mark++; |
| 104 | len = (items > 0 ? (delimlen * (items - 1) ) : 0); |
| 105 | if (SvTYPE(sv) < SVt_PV) |
| 106 | sv_upgrade(sv, SVt_PV); |
| 107 | if (SvLEN(sv) < len + items) { /* current length is way too short */ |
| 108 | while (items-- > 0) { |
| 109 | if (*mark && !SvGMAGICAL(*mark) && SvOK(*mark)) { |
| 110 | SvPV(*mark, tmplen); |
| 111 | len += tmplen; |
| 112 | } |
| 113 | mark++; |
| 114 | } |
| 115 | SvGROW(sv, len + 1); /* so try to pre-extend */ |
| 116 | |
| 117 | mark = oldmark; |
| 118 | items = sp - mark;; |
| 119 | ++mark; |
| 120 | } |
| 121 | |
| 122 | if (items-- > 0) { |
| 123 | char *s; |
| 124 | |
| 125 | if (*mark) { |
| 126 | s = SvPV(*mark, tmplen); |
| 127 | sv_setpvn(sv, s, tmplen); |
| 128 | } |
| 129 | else |
| 130 | sv_setpv(sv, ""); |
| 131 | mark++; |
| 132 | } |
| 133 | else |
| 134 | sv_setpv(sv,""); |
| 135 | len = delimlen; |
| 136 | if (len) { |
| 137 | for (; items > 0; items--,mark++) { |
| 138 | sv_catpvn(sv,delim,len); |
| 139 | sv_catsv(sv,*mark); |
| 140 | } |
| 141 | } |
| 142 | else { |
| 143 | for (; items > 0; items--,mark++) |
| 144 | sv_catsv(sv,*mark); |
| 145 | } |
| 146 | SvSETMAGIC(sv); |
| 147 | } |
| 148 | |
| 149 | void |
| 150 | do_sprintf(SV *sv, I32 len, SV **sarg) |
| 151 | { |
| 152 | STRLEN patlen; |
| 153 | char *pat = SvPV(*sarg, patlen); |
| 154 | bool do_taint = FALSE; |
| 155 | |
| 156 | sv_vsetpvfn(sv, pat, patlen, Null(va_list*), sarg + 1, len - 1, &do_taint); |
| 157 | SvSETMAGIC(sv); |
| 158 | if (do_taint) |
| 159 | SvTAINTED_on(sv); |
| 160 | } |
| 161 | |
| 162 | void |
| 163 | do_vecset(SV *sv) |
| 164 | { |
| 165 | SV *targ = LvTARG(sv); |
| 166 | register I32 offset; |
| 167 | register I32 size; |
| 168 | register unsigned char *s; |
| 169 | register unsigned long lval; |
| 170 | I32 mask; |
| 171 | STRLEN targlen; |
| 172 | STRLEN len; |
| 173 | |
| 174 | if (!targ) |
| 175 | return; |
| 176 | s = (unsigned char*)SvPV_force(targ, targlen); |
| 177 | lval = U_L(SvNV(sv)); |
| 178 | offset = LvTARGOFF(sv); |
| 179 | size = LvTARGLEN(sv); |
| 180 | |
| 181 | len = (offset + size + 7) / 8; |
| 182 | if (len > targlen) { |
| 183 | s = (unsigned char*)SvGROW(targ, len + 1); |
| 184 | (void)memzero(s + targlen, len - targlen + 1); |
| 185 | SvCUR_set(targ, len); |
| 186 | } |
| 187 | |
| 188 | if (size < 8) { |
| 189 | mask = (1 << size) - 1; |
| 190 | size = offset & 7; |
| 191 | lval &= mask; |
| 192 | offset >>= 3; |
| 193 | s[offset] &= ~(mask << size); |
| 194 | s[offset] |= lval << size; |
| 195 | } |
| 196 | else { |
| 197 | offset >>= 3; |
| 198 | if (size == 8) |
| 199 | s[offset] = lval & 255; |
| 200 | else if (size == 16) { |
| 201 | s[offset] = (lval >> 8) & 255; |
| 202 | s[offset+1] = lval & 255; |
| 203 | } |
| 204 | else if (size == 32) { |
| 205 | s[offset] = (lval >> 24) & 255; |
| 206 | s[offset+1] = (lval >> 16) & 255; |
| 207 | s[offset+2] = (lval >> 8) & 255; |
| 208 | s[offset+3] = lval & 255; |
| 209 | } |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | void |
| 214 | do_chop(register SV *astr, register SV *sv) |
| 215 | { |
| 216 | STRLEN len; |
| 217 | char *s; |
| 218 | |
| 219 | if (SvTYPE(sv) == SVt_PVAV) { |
| 220 | register I32 i; |
| 221 | I32 max; |
| 222 | AV* av = (AV*)sv; |
| 223 | max = AvFILL(av); |
| 224 | for (i = 0; i <= max; i++) { |
| 225 | sv = (SV*)av_fetch(av, i, FALSE); |
| 226 | if (sv && ((sv = *(SV**)sv), sv != &PL_sv_undef)) |
| 227 | do_chop(astr, sv); |
| 228 | } |
| 229 | return; |
| 230 | } |
| 231 | if (SvTYPE(sv) == SVt_PVHV) { |
| 232 | HV* hv = (HV*)sv; |
| 233 | HE* entry; |
| 234 | (void)hv_iterinit(hv); |
| 235 | /*SUPPRESS 560*/ |
| 236 | while (entry = hv_iternext(hv)) |
| 237 | do_chop(astr,hv_iterval(hv,entry)); |
| 238 | return; |
| 239 | } |
| 240 | s = SvPV(sv, len); |
| 241 | if (len && !SvPOK(sv)) |
| 242 | s = SvPV_force(sv, len); |
| 243 | if (s && len) { |
| 244 | s += --len; |
| 245 | sv_setpvn(astr, s, 1); |
| 246 | *s = '\0'; |
| 247 | SvCUR_set(sv, len); |
| 248 | SvNIOK_off(sv); |
| 249 | } |
| 250 | else |
| 251 | sv_setpvn(astr, "", 0); |
| 252 | SvSETMAGIC(sv); |
| 253 | } |
| 254 | |
| 255 | I32 |
| 256 | do_chomp(register SV *sv) |
| 257 | { |
| 258 | dTHR; |
| 259 | register I32 count; |
| 260 | STRLEN len; |
| 261 | char *s; |
| 262 | |
| 263 | if (RsSNARF(PL_rs)) |
| 264 | return 0; |
| 265 | count = 0; |
| 266 | if (SvTYPE(sv) == SVt_PVAV) { |
| 267 | register I32 i; |
| 268 | I32 max; |
| 269 | AV* av = (AV*)sv; |
| 270 | max = AvFILL(av); |
| 271 | for (i = 0; i <= max; i++) { |
| 272 | sv = (SV*)av_fetch(av, i, FALSE); |
| 273 | if (sv && ((sv = *(SV**)sv), sv != &PL_sv_undef)) |
| 274 | count += do_chomp(sv); |
| 275 | } |
| 276 | return count; |
| 277 | } |
| 278 | if (SvTYPE(sv) == SVt_PVHV) { |
| 279 | HV* hv = (HV*)sv; |
| 280 | HE* entry; |
| 281 | (void)hv_iterinit(hv); |
| 282 | /*SUPPRESS 560*/ |
| 283 | while (entry = hv_iternext(hv)) |
| 284 | count += do_chomp(hv_iterval(hv,entry)); |
| 285 | return count; |
| 286 | } |
| 287 | s = SvPV(sv, len); |
| 288 | if (len && !SvPOKp(sv)) |
| 289 | s = SvPV_force(sv, len); |
| 290 | if (s && len) { |
| 291 | s += --len; |
| 292 | if (RsPARA(PL_rs)) { |
| 293 | if (*s != '\n') |
| 294 | goto nope; |
| 295 | ++count; |
| 296 | while (len && s[-1] == '\n') { |
| 297 | --len; |
| 298 | --s; |
| 299 | ++count; |
| 300 | } |
| 301 | } |
| 302 | else { |
| 303 | STRLEN rslen; |
| 304 | char *rsptr = SvPV(PL_rs, rslen); |
| 305 | if (rslen == 1) { |
| 306 | if (*s != *rsptr) |
| 307 | goto nope; |
| 308 | ++count; |
| 309 | } |
| 310 | else { |
| 311 | if (len < rslen - 1) |
| 312 | goto nope; |
| 313 | len -= rslen - 1; |
| 314 | s -= rslen - 1; |
| 315 | if (memNE(s, rsptr, rslen)) |
| 316 | goto nope; |
| 317 | count += rslen; |
| 318 | } |
| 319 | } |
| 320 | *s = '\0'; |
| 321 | SvCUR_set(sv, len); |
| 322 | SvNIOK_off(sv); |
| 323 | } |
| 324 | nope: |
| 325 | SvSETMAGIC(sv); |
| 326 | return count; |
| 327 | } |
| 328 | |
| 329 | void |
| 330 | do_vop(I32 optype, SV *sv, SV *left, SV *right) |
| 331 | { |
| 332 | dTHR; /* just for taint */ |
| 333 | #ifdef LIBERAL |
| 334 | register long *dl; |
| 335 | register long *ll; |
| 336 | register long *rl; |
| 337 | #endif |
| 338 | register char *dc; |
| 339 | STRLEN leftlen; |
| 340 | STRLEN rightlen; |
| 341 | register char *lc; |
| 342 | register char *rc; |
| 343 | register I32 len; |
| 344 | I32 lensave; |
| 345 | char *lsave; |
| 346 | char *rsave; |
| 347 | |
| 348 | if (sv != left || (optype != OP_BIT_AND && !SvOK(sv) && !SvGMAGICAL(sv))) |
| 349 | sv_setpvn(sv, "", 0); /* avoid undef warning on |= and ^= */ |
| 350 | lsave = lc = SvPV(left, leftlen); |
| 351 | rsave = rc = SvPV(right, rightlen); |
| 352 | len = leftlen < rightlen ? leftlen : rightlen; |
| 353 | lensave = len; |
| 354 | if (SvOK(sv) || SvTYPE(sv) > SVt_PVMG) { |
| 355 | dc = SvPV_force(sv, PL_na); |
| 356 | if (SvCUR(sv) < len) { |
| 357 | dc = SvGROW(sv, len + 1); |
| 358 | (void)memzero(dc + SvCUR(sv), len - SvCUR(sv) + 1); |
| 359 | } |
| 360 | } |
| 361 | else { |
| 362 | I32 needlen = ((optype == OP_BIT_AND) |
| 363 | ? len : (leftlen > rightlen ? leftlen : rightlen)); |
| 364 | Newz(801, dc, needlen + 1, char); |
| 365 | (void)sv_usepvn(sv, dc, needlen); |
| 366 | dc = SvPVX(sv); /* sv_usepvn() calls Renew() */ |
| 367 | } |
| 368 | SvCUR_set(sv, len); |
| 369 | (void)SvPOK_only(sv); |
| 370 | #ifdef LIBERAL |
| 371 | if (len >= sizeof(long)*4 && |
| 372 | !((long)dc % sizeof(long)) && |
| 373 | !((long)lc % sizeof(long)) && |
| 374 | !((long)rc % sizeof(long))) /* It's almost always aligned... */ |
| 375 | { |
| 376 | I32 remainder = len % (sizeof(long)*4); |
| 377 | len /= (sizeof(long)*4); |
| 378 | |
| 379 | dl = (long*)dc; |
| 380 | ll = (long*)lc; |
| 381 | rl = (long*)rc; |
| 382 | |
| 383 | switch (optype) { |
| 384 | case OP_BIT_AND: |
| 385 | while (len--) { |
| 386 | *dl++ = *ll++ & *rl++; |
| 387 | *dl++ = *ll++ & *rl++; |
| 388 | *dl++ = *ll++ & *rl++; |
| 389 | *dl++ = *ll++ & *rl++; |
| 390 | } |
| 391 | break; |
| 392 | case OP_BIT_XOR: |
| 393 | while (len--) { |
| 394 | *dl++ = *ll++ ^ *rl++; |
| 395 | *dl++ = *ll++ ^ *rl++; |
| 396 | *dl++ = *ll++ ^ *rl++; |
| 397 | *dl++ = *ll++ ^ *rl++; |
| 398 | } |
| 399 | break; |
| 400 | case OP_BIT_OR: |
| 401 | while (len--) { |
| 402 | *dl++ = *ll++ | *rl++; |
| 403 | *dl++ = *ll++ | *rl++; |
| 404 | *dl++ = *ll++ | *rl++; |
| 405 | *dl++ = *ll++ | *rl++; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | dc = (char*)dl; |
| 410 | lc = (char*)ll; |
| 411 | rc = (char*)rl; |
| 412 | |
| 413 | len = remainder; |
| 414 | } |
| 415 | #endif |
| 416 | { |
| 417 | switch (optype) { |
| 418 | case OP_BIT_AND: |
| 419 | while (len--) |
| 420 | *dc++ = *lc++ & *rc++; |
| 421 | break; |
| 422 | case OP_BIT_XOR: |
| 423 | while (len--) |
| 424 | *dc++ = *lc++ ^ *rc++; |
| 425 | goto mop_up; |
| 426 | case OP_BIT_OR: |
| 427 | while (len--) |
| 428 | *dc++ = *lc++ | *rc++; |
| 429 | mop_up: |
| 430 | len = lensave; |
| 431 | if (rightlen > len) |
| 432 | sv_catpvn(sv, rsave + len, rightlen - len); |
| 433 | else if (leftlen > len) |
| 434 | sv_catpvn(sv, lsave + len, leftlen - len); |
| 435 | else |
| 436 | *SvEND(sv) = '\0'; |
| 437 | break; |
| 438 | } |
| 439 | } |
| 440 | SvTAINT(sv); |
| 441 | } |
| 442 | |
| 443 | OP * |
| 444 | do_kv(ARGSproto) |
| 445 | { |
| 446 | djSP; |
| 447 | HV *hv = (HV*)POPs; |
| 448 | HV *keys; |
| 449 | register HE *entry; |
| 450 | SV *tmpstr; |
| 451 | I32 gimme = GIMME_V; |
| 452 | I32 dokeys = (PL_op->op_type == OP_KEYS); |
| 453 | I32 dovalues = (PL_op->op_type == OP_VALUES); |
| 454 | I32 realhv = (SvTYPE(hv) == SVt_PVHV); |
| 455 | |
| 456 | if (PL_op->op_type == OP_RV2HV || PL_op->op_type == OP_PADHV) |
| 457 | dokeys = dovalues = TRUE; |
| 458 | |
| 459 | if (!hv) { |
| 460 | if (PL_op->op_flags & OPf_MOD) { /* lvalue */ |
| 461 | dTARGET; /* make sure to clear its target here */ |
| 462 | if (SvTYPE(TARG) == SVt_PVLV) |
| 463 | LvTARG(TARG) = Nullsv; |
| 464 | PUSHs(TARG); |
| 465 | } |
| 466 | RETURN; |
| 467 | } |
| 468 | |
| 469 | keys = realhv ? hv : avhv_keys((AV*)hv); |
| 470 | (void)hv_iterinit(keys); /* always reset iterator regardless */ |
| 471 | |
| 472 | if (gimme == G_VOID) |
| 473 | RETURN; |
| 474 | |
| 475 | if (gimme == G_SCALAR) { |
| 476 | IV i; |
| 477 | dTARGET; |
| 478 | |
| 479 | if (PL_op->op_flags & OPf_MOD) { /* lvalue */ |
| 480 | if (SvTYPE(TARG) < SVt_PVLV) { |
| 481 | sv_upgrade(TARG, SVt_PVLV); |
| 482 | sv_magic(TARG, Nullsv, 'k', Nullch, 0); |
| 483 | } |
| 484 | LvTYPE(TARG) = 'k'; |
| 485 | if (LvTARG(TARG) != (SV*)keys) { |
| 486 | if (LvTARG(TARG)) |
| 487 | SvREFCNT_dec(LvTARG(TARG)); |
| 488 | LvTARG(TARG) = SvREFCNT_inc(keys); |
| 489 | } |
| 490 | PUSHs(TARG); |
| 491 | RETURN; |
| 492 | } |
| 493 | |
| 494 | if (!SvRMAGICAL(keys) || !mg_find((SV*)keys,'P')) |
| 495 | i = HvKEYS(keys); |
| 496 | else { |
| 497 | i = 0; |
| 498 | /*SUPPRESS 560*/ |
| 499 | while (hv_iternext(keys)) i++; |
| 500 | } |
| 501 | PUSHi( i ); |
| 502 | RETURN; |
| 503 | } |
| 504 | |
| 505 | EXTEND(SP, HvKEYS(keys) * (dokeys + dovalues)); |
| 506 | |
| 507 | PUTBACK; /* hv_iternext and hv_iterval might clobber stack_sp */ |
| 508 | while (entry = hv_iternext(keys)) { |
| 509 | SPAGAIN; |
| 510 | if (dokeys) |
| 511 | XPUSHs(hv_iterkeysv(entry)); /* won't clobber stack_sp */ |
| 512 | if (dovalues) { |
| 513 | tmpstr = sv_newmortal(); |
| 514 | PUTBACK; |
| 515 | sv_setsv(tmpstr,realhv ? |
| 516 | hv_iterval(hv,entry) : avhv_iterval((AV*)hv,entry)); |
| 517 | DEBUG_H(sv_setpvf(tmpstr, "%lu%%%d=%lu", |
| 518 | (unsigned long)HeHASH(entry), |
| 519 | HvMAX(keys)+1, |
| 520 | (unsigned long)(HeHASH(entry) & HvMAX(keys)))); |
| 521 | SPAGAIN; |
| 522 | XPUSHs(tmpstr); |
| 523 | } |
| 524 | PUTBACK; |
| 525 | } |
| 526 | return NORMAL; |
| 527 | } |
| 528 | |