3 * Copyright (c) 1991-1999, Larry Wall
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.
11 * "I wonder what the Entish is for 'yes' and 'no'," he thought.
18 /* Use an overridden DBL_DIG */
22 # define DBL_DIG OVR_DBL_DIG
24 /* The following is all to get DBL_DIG, in order to pick a nice
25 default value for printing floating point numbers in Gconvert.
35 #define DBL_DIG 15 /* A guess that works lots of places */
40 #define FCALL this->*f
41 #define VTBL this->*vtbl
43 #else /* !PERL_OBJECT */
45 static IV asIV _((SV* sv));
46 static UV asUV _((SV* sv));
47 static SV *more_sv _((void));
48 static void more_xiv _((void));
49 static void more_xnv _((void));
50 static void more_xpv _((void));
51 static void more_xrv _((void));
52 static XPVIV *new_xiv _((void));
53 static XPVNV *new_xnv _((void));
54 static XPV *new_xpv _((void));
55 static XRV *new_xrv _((void));
56 static void del_xiv _((XPVIV* p));
57 static void del_xnv _((XPVNV* p));
58 static void del_xpv _((XPV* p));
59 static void del_xrv _((XRV* p));
60 static void sv_unglob _((SV* sv));
63 static void *my_safemalloc(MEM_SIZE size);
66 typedef void (*SVFUNC) _((SV*));
70 #endif /* PERL_OBJECT */
72 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv)
79 (p) = (SV*)safemalloc(sizeof(SV)); \
88 Safefree((char*)(p)); \
93 static I32 registry_size;
95 #define REGHASH(sv,size) ((((U32)(sv)) >> 2) % (size))
97 #define REG_REPLACE(sv,a,b) \
99 void* p = sv->sv_any; \
100 I32 h = REGHASH(sv, registry_size); \
102 while (registry[i] != (a)) { \
103 if (++i >= registry_size) \
106 die("SV registry bug"); \
111 #define REG_ADD(sv) REG_REPLACE(sv,Nullsv,sv)
112 #define REG_REMOVE(sv) REG_REPLACE(sv,sv,Nullsv)
118 if (PL_sv_count >= (registry_size >> 1))
120 SV **oldreg = registry;
121 I32 oldsize = registry_size;
123 registry_size = registry_size ? ((registry_size << 2) + 1) : 2037;
124 Newz(707, registry, registry_size, SV*);
129 for (i = 0; i < oldsize; ++i) {
130 SV* oldsv = oldreg[i];
156 for (i = 0; i < registry_size; ++i) {
157 SV* sv = registry[i];
158 if (sv && SvTYPE(sv) != SVTYPEMASK)
164 sv_add_arena(ptr, size, flags)
169 if (!(flags & SVf_FAKE))
176 * "A time to plant, and a time to uproot what was planted..."
179 #define plant_SV(p) \
181 SvANY(p) = (void *)PL_sv_root; \
182 SvFLAGS(p) = SVTYPEMASK; \
187 /* sv_mutex must be held while calling uproot_SV() */
188 #define uproot_SV(p) \
191 PL_sv_root = (SV*)SvANY(p); \
195 #define new_SV(p) do { \
206 #define del_SV(p) do { \
208 if (PL_debug & 32768) \
218 if (PL_debug & 32768) {
223 for (sva = PL_sv_arenaroot; sva; sva = (SV *) SvANY(sva)) {
225 svend = &sva[SvREFCNT(sva)];
226 if (p >= sv && p < svend)
230 warn("Attempt to free non-arena SV: 0x%lx", (unsigned long)p);
237 #else /* ! DEBUGGING */
239 #define del_SV(p) plant_SV(p)
241 #endif /* DEBUGGING */
244 sv_add_arena(char *ptr, U32 size, U32 flags)
249 Zero(sva, size, char);
251 /* The first SV in an arena isn't an SV. */
252 SvANY(sva) = (void *) PL_sv_arenaroot; /* ptr to next arena */
253 SvREFCNT(sva) = size / sizeof(SV); /* number of SV slots */
254 SvFLAGS(sva) = flags; /* FAKE if not to be freed */
256 PL_sv_arenaroot = sva;
257 PL_sv_root = sva + 1;
259 svend = &sva[SvREFCNT(sva) - 1];
262 SvANY(sv) = (void *)(SV*)(sv + 1);
263 SvFLAGS(sv) = SVTYPEMASK;
267 SvFLAGS(sv) = SVTYPEMASK;
270 /* sv_mutex must be held while calling more_sv() */
277 sv_add_arena(PL_nice_chunk, PL_nice_chunk_size, 0);
278 PL_nice_chunk = Nullch;
281 char *chunk; /* must use New here to match call to */
282 New(704,chunk,1008,char); /* Safefree() in sv_free_arenas() */
283 sv_add_arena(chunk, 1008, 0);
296 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
297 svend = &sva[SvREFCNT(sva)];
298 for (sv = sva + 1; sv < svend; ++sv) {
299 if (SvTYPE(sv) != SVTYPEMASK)
308 do_report_used(SV *sv)
310 if (SvTYPE(sv) != SVTYPEMASK) {
311 /* XXX Perhaps this ought to go to Perl_debug_log, if DEBUGGING. */
312 PerlIO_printf(PerlIO_stderr(), "****\n");
320 visit(FUNC_NAME_TO_PTR(do_report_used));
324 do_clean_objs(SV *sv)
328 if (SvROK(sv) && SvOBJECT(rv = SvRV(sv))) {
329 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning object ref:\n "), sv_dump(sv));)
335 /* XXX Might want to check arrays, etc. */
338 #ifndef DISABLE_DESTRUCTOR_KLUDGE
340 do_clean_named_objs(SV *sv)
342 if (SvTYPE(sv) == SVt_PVGV) {
343 if ( SvOBJECT(GvSV(sv)) ||
344 GvAV(sv) && SvOBJECT(GvAV(sv)) ||
345 GvHV(sv) && SvOBJECT(GvHV(sv)) ||
346 GvIO(sv) && SvOBJECT(GvIO(sv)) ||
347 GvCV(sv) && SvOBJECT(GvCV(sv)) )
349 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning named glob object:\n "), sv_dump(sv));)
359 PL_in_clean_objs = TRUE;
360 visit(FUNC_NAME_TO_PTR(do_clean_objs));
361 #ifndef DISABLE_DESTRUCTOR_KLUDGE
362 /* some barnacles may yet remain, clinging to typeglobs */
363 visit(FUNC_NAME_TO_PTR(do_clean_named_objs));
365 PL_in_clean_objs = FALSE;
371 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning loops: SV at 0x%lx\n", sv) );)
372 SvFLAGS(sv) |= SVf_BREAK;
379 PL_in_clean_all = TRUE;
380 visit(FUNC_NAME_TO_PTR(do_clean_all));
381 PL_in_clean_all = FALSE;
390 /* Free arenas here, but be careful about fake ones. (We assume
391 contiguity of the fake ones with the corresponding real ones.) */
393 for (sva = PL_sv_arenaroot; sva; sva = svanext) {
394 svanext = (SV*) SvANY(sva);
395 while (svanext && SvFAKE(svanext))
396 svanext = (SV*) SvANY(svanext);
399 Safefree((void *)sva);
403 Safefree(PL_nice_chunk);
404 PL_nice_chunk = Nullch;
405 PL_nice_chunk_size = 0;
419 * See comment in more_xiv() -- RAM.
421 PL_xiv_root = *(IV**)xiv;
423 return (XPVIV*)((char*)xiv - STRUCT_OFFSET(XPVIV, xiv_iv));
429 IV* xiv = (IV*)((char*)(p) + STRUCT_OFFSET(XPVIV, xiv_iv));
431 *(IV**)xiv = PL_xiv_root;
442 New(705, ptr, 1008/sizeof(XPV), XPV);
443 ptr->xpv_pv = (char*)PL_xiv_arenaroot; /* linked list of xiv arenas */
444 PL_xiv_arenaroot = ptr; /* to keep Purify happy */
447 xivend = &xiv[1008 / sizeof(IV) - 1];
448 xiv += (sizeof(XPV) - 1) / sizeof(IV) + 1; /* fudge by size of XPV */
450 while (xiv < xivend) {
451 *(IV**)xiv = (IV *)(xiv + 1);
465 PL_xnv_root = *(double**)xnv;
467 return (XPVNV*)((char*)xnv - STRUCT_OFFSET(XPVNV, xnv_nv));
473 double* xnv = (double*)((char*)(p) + STRUCT_OFFSET(XPVNV, xnv_nv));
475 *(double**)xnv = PL_xnv_root;
483 register double* xnv;
484 register double* xnvend;
485 New(711, xnv, 1008/sizeof(double), double);
486 xnvend = &xnv[1008 / sizeof(double) - 1];
487 xnv += (sizeof(XPVIV) - 1) / sizeof(double) + 1; /* fudge by sizeof XPVIV */
489 while (xnv < xnvend) {
490 *(double**)xnv = (double*)(xnv + 1);
504 PL_xrv_root = (XRV*)xrv->xrv_rv;
513 p->xrv_rv = (SV*)PL_xrv_root;
522 register XRV* xrvend;
523 New(712, PL_xrv_root, 1008/sizeof(XRV), XRV);
525 xrvend = &xrv[1008 / sizeof(XRV) - 1];
526 while (xrv < xrvend) {
527 xrv->xrv_rv = (SV*)(xrv + 1);
541 PL_xpv_root = (XPV*)xpv->xpv_pv;
550 p->xpv_pv = (char*)PL_xpv_root;
559 register XPV* xpvend;
560 New(713, PL_xpv_root, 1008/sizeof(XPV), XPV);
562 xpvend = &xpv[1008 / sizeof(XPV) - 1];
563 while (xpv < xpvend) {
564 xpv->xpv_pv = (char*)(xpv + 1);
571 #define new_XIV() (void*)safemalloc(sizeof(XPVIV))
572 #define del_XIV(p) Safefree((char*)p)
574 #define new_XIV() (void*)new_xiv()
575 #define del_XIV(p) del_xiv((XPVIV*) p)
579 #define new_XNV() (void*)safemalloc(sizeof(XPVNV))
580 #define del_XNV(p) Safefree((char*)p)
582 #define new_XNV() (void*)new_xnv()
583 #define del_XNV(p) del_xnv((XPVNV*) p)
587 #define new_XRV() (void*)safemalloc(sizeof(XRV))
588 #define del_XRV(p) Safefree((char*)p)
590 #define new_XRV() (void*)new_xrv()
591 #define del_XRV(p) del_xrv((XRV*) p)
595 #define new_XPV() (void*)safemalloc(sizeof(XPV))
596 #define del_XPV(p) Safefree((char*)p)
598 #define new_XPV() (void*)new_xpv()
599 #define del_XPV(p) del_xpv((XPV *)p)
603 # define my_safemalloc(s) safemalloc(s)
604 # define my_safefree(s) safefree(s)
607 my_safemalloc(MEM_SIZE size)
610 New(717, p, size, char);
613 # define my_safefree(s) Safefree(s)
616 #define new_XPVIV() (void*)my_safemalloc(sizeof(XPVIV))
617 #define del_XPVIV(p) my_safefree((char*)p)
619 #define new_XPVNV() (void*)my_safemalloc(sizeof(XPVNV))
620 #define del_XPVNV(p) my_safefree((char*)p)
622 #define new_XPVMG() (void*)my_safemalloc(sizeof(XPVMG))
623 #define del_XPVMG(p) my_safefree((char*)p)
625 #define new_XPVLV() (void*)my_safemalloc(sizeof(XPVLV))
626 #define del_XPVLV(p) my_safefree((char*)p)
628 #define new_XPVAV() (void*)my_safemalloc(sizeof(XPVAV))
629 #define del_XPVAV(p) my_safefree((char*)p)
631 #define new_XPVHV() (void*)my_safemalloc(sizeof(XPVHV))
632 #define del_XPVHV(p) my_safefree((char*)p)
634 #define new_XPVCV() (void*)my_safemalloc(sizeof(XPVCV))
635 #define del_XPVCV(p) my_safefree((char*)p)
637 #define new_XPVGV() (void*)my_safemalloc(sizeof(XPVGV))
638 #define del_XPVGV(p) my_safefree((char*)p)
640 #define new_XPVBM() (void*)my_safemalloc(sizeof(XPVBM))
641 #define del_XPVBM(p) my_safefree((char*)p)
643 #define new_XPVFM() (void*)my_safemalloc(sizeof(XPVFM))
644 #define del_XPVFM(p) my_safefree((char*)p)
646 #define new_XPVIO() (void*)my_safemalloc(sizeof(XPVIO))
647 #define del_XPVIO(p) my_safefree((char*)p)
650 sv_upgrade(register SV *sv, U32 mt)
660 if (SvTYPE(sv) == mt)
666 switch (SvTYPE(sv)) {
681 nv = (double)SvIVX(sv);
687 else if (mt < SVt_PVIV)
704 pv = (char*)SvRV(sv);
708 nv = (double)(unsigned long)pv;
724 else if (mt == SVt_NV)
735 del_XPVIV(SvANY(sv));
745 del_XPVNV(SvANY(sv));
755 del_XPVMG(SvANY(sv));
758 croak("Can't upgrade that kind of scalar");
763 croak("Can't upgrade to undef");
765 SvANY(sv) = new_XIV();
769 SvANY(sv) = new_XNV();
773 SvANY(sv) = new_XRV();
777 SvANY(sv) = new_XPV();
783 SvANY(sv) = new_XPVIV();
793 SvANY(sv) = new_XPVNV();
801 SvANY(sv) = new_XPVMG();
811 SvANY(sv) = new_XPVLV();
825 SvANY(sv) = new_XPVAV();
840 SvANY(sv) = new_XPVHV();
856 SvANY(sv) = new_XPVCV();
857 Zero(SvANY(sv), 1, XPVCV);
867 SvANY(sv) = new_XPVGV();
882 SvANY(sv) = new_XPVBM();
895 SvANY(sv) = new_XPVFM();
896 Zero(SvANY(sv), 1, XPVFM);
906 SvANY(sv) = new_XPVIO();
907 Zero(SvANY(sv), 1, XPVIO);
918 SvFLAGS(sv) &= ~SVTYPEMASK;
924 sv_backoff(register SV *sv)
929 SvLEN(sv) += SvIVX(sv);
930 SvPVX(sv) -= SvIVX(sv);
932 Move(s, SvPVX(sv), SvCUR(sv)+1, char);
934 SvFLAGS(sv) &= ~SVf_OOK;
939 sv_grow(register SV *sv, register STRLEN newlen)
944 if (newlen >= 0x10000) {
945 PerlIO_printf(Perl_debug_log, "Allocation too large: %lx\n", newlen);
948 #endif /* HAS_64K_LIMIT */
951 if (SvTYPE(sv) < SVt_PV) {
952 sv_upgrade(sv, SVt_PV);
955 else if (SvOOK(sv)) { /* pv is offset? */
958 if (newlen > SvLEN(sv))
959 newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */
961 if (newlen >= 0x10000)
967 if (newlen > SvLEN(sv)) { /* need more room? */
968 if (SvLEN(sv) && s) {
969 #if defined(MYMALLOC) && !defined(PURIFY) && !defined(LEAKTEST)
970 STRLEN l = malloced_size((void*)SvPVX(sv));
976 Renew(s,newlen,char);
979 New(703,s,newlen,char);
981 SvLEN_set(sv, newlen);
987 sv_setiv(register SV *sv, IV i)
989 SV_CHECK_THINKFIRST(sv);
990 switch (SvTYPE(sv)) {
992 sv_upgrade(sv, SVt_IV);
995 sv_upgrade(sv, SVt_PVNV);
999 sv_upgrade(sv, SVt_PVIV);
1010 croak("Can't coerce %s to integer in %s", sv_reftype(sv,0),
1011 PL_op_desc[PL_op->op_type]);
1014 (void)SvIOK_only(sv); /* validate number */
1020 sv_setiv_mg(register SV *sv, IV i)
1027 sv_setuv(register SV *sv, UV u)
1032 sv_setnv(sv, (double)u);
1036 sv_setuv_mg(register SV *sv, UV u)
1043 sv_setnv(register SV *sv, double num)
1045 SV_CHECK_THINKFIRST(sv);
1046 switch (SvTYPE(sv)) {
1049 sv_upgrade(sv, SVt_NV);
1054 sv_upgrade(sv, SVt_PVNV);
1065 croak("Can't coerce %s to number in %s", sv_reftype(sv,0),
1066 PL_op_name[PL_op->op_type]);
1070 (void)SvNOK_only(sv); /* validate number */
1075 sv_setnv_mg(register SV *sv, double num)
1082 not_a_number(SV *sv)
1088 char *limit = tmpbuf + sizeof(tmpbuf) - 8;
1089 /* each *s can expand to 4 chars + "...\0",
1090 i.e. need room for 8 chars */
1092 for (s = SvPVX(sv); *s && d < limit; s++) {
1094 if (ch & 128 && !isPRINT_LC(ch)) {
1103 else if (ch == '\r') {
1107 else if (ch == '\f') {
1111 else if (ch == '\\') {
1115 else if (isPRINT_LC(ch))
1130 warner(WARN_NUMERIC, "Argument \"%s\" isn't numeric in %s", tmpbuf,
1131 PL_op_name[PL_op->op_type]);
1133 warner(WARN_NUMERIC, "Argument \"%s\" isn't numeric", tmpbuf);
1137 sv_2iv(register SV *sv)
1141 if (SvGMAGICAL(sv)) {
1146 if (SvNVX(sv) < 0.0)
1147 return I_V(SvNVX(sv));
1149 return (IV) U_V(SvNVX(sv));
1151 if (SvPOKp(sv) && SvLEN(sv))
1154 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
1156 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1157 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1162 if (SvTHINKFIRST(sv)) {
1165 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv, numer)))
1166 return SvIV(tmpstr);
1167 return (IV)SvRV(sv);
1169 if (SvREADONLY(sv)) {
1171 if (SvNVX(sv) < 0.0)
1172 return I_V(SvNVX(sv));
1174 return (IV) U_V(SvNVX(sv));
1176 if (SvPOKp(sv) && SvLEN(sv))
1180 if (ckWARN(WARN_UNINITIALIZED))
1181 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1186 switch (SvTYPE(sv)) {
1188 sv_upgrade(sv, SVt_IV);
1191 sv_upgrade(sv, SVt_PVIV);
1194 sv_upgrade(sv, SVt_PVNV);
1199 if (SvNVX(sv) < 0.0)
1200 SvIVX(sv) = I_V(SvNVX(sv));
1202 SvUVX(sv) = U_V(SvNVX(sv));
1204 else if (SvPOKp(sv) && SvLEN(sv)) {
1206 SvIVX(sv) = asIV(sv);
1210 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
1211 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1214 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2iv(%ld)\n",
1215 (unsigned long)sv,(long)SvIVX(sv)));
1220 sv_2uv(register SV *sv)
1224 if (SvGMAGICAL(sv)) {
1229 return U_V(SvNVX(sv));
1230 if (SvPOKp(sv) && SvLEN(sv))
1233 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
1235 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1236 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1241 if (SvTHINKFIRST(sv)) {
1244 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv, numer)))
1245 return SvUV(tmpstr);
1246 return (UV)SvRV(sv);
1248 if (SvREADONLY(sv)) {
1250 return U_V(SvNVX(sv));
1252 if (SvPOKp(sv) && SvLEN(sv))
1256 if (ckWARN(WARN_UNINITIALIZED))
1257 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1262 switch (SvTYPE(sv)) {
1264 sv_upgrade(sv, SVt_IV);
1267 sv_upgrade(sv, SVt_PVIV);
1270 sv_upgrade(sv, SVt_PVNV);
1275 SvUVX(sv) = U_V(SvNVX(sv));
1277 else if (SvPOKp(sv) && SvLEN(sv)) {
1279 SvUVX(sv) = asUV(sv);
1282 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
1284 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1285 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1289 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2uv(%lu)\n",
1290 (unsigned long)sv,SvUVX(sv)));
1295 sv_2nv(register SV *sv)
1299 if (SvGMAGICAL(sv)) {
1303 if (SvPOKp(sv) && SvLEN(sv)) {
1305 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv))
1307 SET_NUMERIC_STANDARD();
1308 return atof(SvPVX(sv));
1311 return (double)SvIVX(sv);
1313 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
1315 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1316 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1321 if (SvTHINKFIRST(sv)) {
1324 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)))
1325 return SvNV(tmpstr);
1326 return (double)(unsigned long)SvRV(sv);
1328 if (SvREADONLY(sv)) {
1330 if (SvPOKp(sv) && SvLEN(sv)) {
1331 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv))
1333 SET_NUMERIC_STANDARD();
1334 return atof(SvPVX(sv));
1337 return (double)SvIVX(sv);
1338 if (ckWARN(WARN_UNINITIALIZED))
1339 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1343 if (SvTYPE(sv) < SVt_NV) {
1344 if (SvTYPE(sv) == SVt_IV)
1345 sv_upgrade(sv, SVt_PVNV);
1347 sv_upgrade(sv, SVt_NV);
1348 DEBUG_c(SET_NUMERIC_STANDARD());
1349 DEBUG_c(PerlIO_printf(Perl_debug_log,
1350 "0x%lx num(%g)\n",(unsigned long)sv,SvNVX(sv)));
1352 else if (SvTYPE(sv) < SVt_PVNV)
1353 sv_upgrade(sv, SVt_PVNV);
1355 (!SvPOKp(sv) || !strchr(SvPVX(sv),'.') || !looks_like_number(sv)))
1357 SvNVX(sv) = (double)SvIVX(sv);
1359 else if (SvPOKp(sv) && SvLEN(sv)) {
1361 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv))
1363 SET_NUMERIC_STANDARD();
1364 SvNVX(sv) = atof(SvPVX(sv));
1368 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
1369 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1373 DEBUG_c(SET_NUMERIC_STANDARD());
1374 DEBUG_c(PerlIO_printf(Perl_debug_log,
1375 "0x%lx 2nv(%g)\n",(unsigned long)sv,SvNVX(sv)));
1382 I32 numtype = looks_like_number(sv);
1386 return atol(SvPVX(sv));
1389 if (ckWARN(WARN_NUMERIC))
1392 SET_NUMERIC_STANDARD();
1393 d = atof(SvPVX(sv));
1403 I32 numtype = looks_like_number(sv);
1407 return strtoul(SvPVX(sv), Null(char**), 10);
1411 if (ckWARN(WARN_NUMERIC))
1414 SET_NUMERIC_STANDARD();
1415 return U_V(atof(SvPVX(sv)));
1419 looks_like_number(SV *sv)
1422 register char *send;
1423 register char *sbegin;
1431 else if (SvPOKp(sv))
1432 sbegin = SvPV(sv, len);
1435 send = sbegin + len;
1440 if (*s == '+' || *s == '-')
1443 /* next must be digit or '.' */
1447 } while (isDIGIT(*s));
1450 while (isDIGIT(*s)) /* optional digits after "." */
1454 else if (*s == '.') {
1456 /* no digits before '.' means we need digits after it */
1460 } while (isDIGIT(*s));
1469 * we return 1 if the number can be converted to _integer_ with atol()
1470 * and 2 if you need (int)atof().
1474 /* we can have an optional exponent part */
1475 if (*s == 'e' || *s == 'E') {
1478 if (*s == '+' || *s == '-')
1483 } while (isDIGIT(*s));
1492 if (len == 10 && memEQ(sbegin, "0 but true", 10))
1498 sv_2pv_nolen(register SV *sv)
1501 return sv_2pv(sv, &n_a);
1505 sv_2pv(register SV *sv, STRLEN *lp)
1510 char tmpbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
1516 if (SvGMAGICAL(sv)) {
1523 (void)sprintf(tmpbuf,"%ld",(long)SvIVX(sv));
1528 SET_NUMERIC_STANDARD();
1529 Gconvert(SvNVX(sv), DBL_DIG, 0, tmpbuf);
1534 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
1536 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
1537 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1543 if (SvTHINKFIRST(sv)) {
1546 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)))
1547 return SvPV(tmpstr,*lp);
1554 switch (SvTYPE(sv)) {
1556 if ( ((SvFLAGS(sv) &
1557 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
1558 == (SVs_OBJECT|SVs_RMG))
1559 && strEQ(s=HvNAME(SvSTASH(sv)), "Regexp")
1560 && (mg = mg_find(sv, 'r'))) {
1562 regexp *re = (regexp *)mg->mg_obj;
1565 char *fptr = "msix";
1570 U16 reganch = (re->reganch & PMf_COMPILETIME) >> 12;
1572 while(ch = *fptr++) {
1574 reflags[left++] = ch;
1577 reflags[right--] = ch;
1582 reflags[left] = '-';
1586 mg->mg_len = re->prelen + 4 + left;
1587 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
1588 Copy("(?", mg->mg_ptr, 2, char);
1589 Copy(reflags, mg->mg_ptr+2, left, char);
1590 Copy(":", mg->mg_ptr+left+2, 1, char);
1591 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
1592 mg->mg_ptr[mg->mg_len - 1] = ')';
1593 mg->mg_ptr[mg->mg_len] = 0;
1595 PL_reginterp_cnt += re->program[0].next_off;
1607 case SVt_PVBM: s = "SCALAR"; break;
1608 case SVt_PVLV: s = "LVALUE"; break;
1609 case SVt_PVAV: s = "ARRAY"; break;
1610 case SVt_PVHV: s = "HASH"; break;
1611 case SVt_PVCV: s = "CODE"; break;
1612 case SVt_PVGV: s = "GLOB"; break;
1613 case SVt_PVFM: s = "FORMAT"; break;
1614 case SVt_PVIO: s = "IO"; break;
1615 default: s = "UNKNOWN"; break;
1619 sv_setpvf(tsv, "%s=%s", HvNAME(SvSTASH(sv)), s);
1622 sv_catpvf(tsv, "(0x%lx)", (unsigned long)sv);
1628 if (SvREADONLY(sv)) {
1630 SET_NUMERIC_STANDARD();
1631 Gconvert(SvNVX(sv), DBL_DIG, 0, tmpbuf);
1636 (void)sprintf(tmpbuf,"%ld",(long)SvIVX(sv));
1642 if (ckWARN(WARN_UNINITIALIZED))
1643 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1649 (void)SvUPGRADE(sv, SVt_PV);
1651 if (SvTYPE(sv) < SVt_PVNV)
1652 sv_upgrade(sv, SVt_PVNV);
1655 olderrno = errno; /* some Xenix systems wipe out errno here */
1657 if (SvNVX(sv) == 0.0)
1658 (void)strcpy(s,"0");
1662 SET_NUMERIC_STANDARD();
1663 Gconvert(SvNVX(sv), DBL_DIG, 0, s);
1666 #ifdef FIXNEGATIVEZERO
1667 if (*s == '-' && s[1] == '0' && !s[2])
1676 else if (SvIOKp(sv)) {
1677 U32 oldIOK = SvIOK(sv);
1678 if (SvTYPE(sv) < SVt_PVIV)
1679 sv_upgrade(sv, SVt_PVIV);
1680 olderrno = errno; /* some Xenix systems wipe out errno here */
1681 sv_setpviv(sv, SvIVX(sv));
1691 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
1692 warner(WARN_UNINITIALIZED, PL_warn_uninit);
1696 *lp = s - SvPVX(sv);
1699 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2pv(%s)\n",(unsigned long)sv,SvPVX(sv)));
1703 if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */
1704 /* Sneaky stuff here */
1708 tsv = newSVpv(tmpbuf, 0);
1724 len = strlen(tmpbuf);
1726 #ifdef FIXNEGATIVEZERO
1727 if (len == 2 && t[0] == '-' && t[1] == '0') {
1732 (void)SvUPGRADE(sv, SVt_PV);
1734 s = SvGROW(sv, len + 1);
1742 /* This function is only called on magical items */
1744 sv_2bool(register SV *sv)
1754 if (SvAMAGIC(sv) && (tmpsv = AMG_CALLun(sv,bool_)))
1755 return SvTRUE(tmpsv);
1756 return SvRV(sv) != 0;
1759 register XPV* Xpvtmp;
1760 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
1761 (*Xpvtmp->xpv_pv > '0' ||
1762 Xpvtmp->xpv_cur > 1 ||
1763 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
1770 return SvIVX(sv) != 0;
1773 return SvNVX(sv) != 0.0;
1780 /* Note: sv_setsv() should not be called with a source string that needs
1781 * to be reused, since it may destroy the source string if it is marked
1786 sv_setsv(SV *dstr, register SV *sstr)
1789 register U32 sflags;
1795 SV_CHECK_THINKFIRST(dstr);
1797 sstr = &PL_sv_undef;
1798 stype = SvTYPE(sstr);
1799 dtype = SvTYPE(dstr);
1803 /* There's a lot of redundancy below but we're going for speed here */
1808 if (dtype != SVt_PVGV) {
1809 (void)SvOK_off(dstr);
1817 sv_upgrade(dstr, SVt_IV);
1820 sv_upgrade(dstr, SVt_PVNV);
1824 sv_upgrade(dstr, SVt_PVIV);
1827 (void)SvIOK_only(dstr);
1828 SvIVX(dstr) = SvIVX(sstr);
1839 sv_upgrade(dstr, SVt_NV);
1844 sv_upgrade(dstr, SVt_PVNV);
1847 SvNVX(dstr) = SvNVX(sstr);
1848 (void)SvNOK_only(dstr);
1856 sv_upgrade(dstr, SVt_RV);
1857 else if (dtype == SVt_PVGV &&
1858 SvTYPE(SvRV(sstr)) == SVt_PVGV) {
1861 if (PL_curcop->cop_stash != GvSTASH(dstr))
1862 GvIMPORTED_on(dstr);
1872 sv_upgrade(dstr, SVt_PV);
1875 if (dtype < SVt_PVIV)
1876 sv_upgrade(dstr, SVt_PVIV);
1879 if (dtype < SVt_PVNV)
1880 sv_upgrade(dstr, SVt_PVNV);
1887 croak("Bizarre copy of %s in %s", sv_reftype(sstr, 0),
1888 PL_op_name[PL_op->op_type]);
1890 croak("Bizarre copy of %s", sv_reftype(sstr, 0));
1894 if (dtype <= SVt_PVGV) {
1896 if (dtype != SVt_PVGV) {
1897 char *name = GvNAME(sstr);
1898 STRLEN len = GvNAMELEN(sstr);
1899 sv_upgrade(dstr, SVt_PVGV);
1900 sv_magic(dstr, dstr, '*', name, len);
1901 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
1902 GvNAME(dstr) = savepvn(name, len);
1903 GvNAMELEN(dstr) = len;
1904 SvFAKE_on(dstr); /* can coerce to non-glob */
1906 /* ahem, death to those who redefine active sort subs */
1907 else if (PL_curstackinfo->si_type == PERLSI_SORT
1908 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
1909 croak("Can't redefine active sort subroutine %s",
1911 (void)SvOK_off(dstr);
1912 GvINTRO_off(dstr); /* one-shot flag */
1914 GvGP(dstr) = gp_ref(GvGP(sstr));
1916 if (PL_curcop->cop_stash != GvSTASH(dstr))
1917 GvIMPORTED_on(dstr);
1924 if (SvGMAGICAL(sstr)) {
1926 if (SvTYPE(sstr) != stype) {
1927 stype = SvTYPE(sstr);
1928 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
1932 if (stype == SVt_PVLV)
1933 (void)SvUPGRADE(dstr, SVt_PVNV);
1935 (void)SvUPGRADE(dstr, stype);
1938 sflags = SvFLAGS(sstr);
1940 if (sflags & SVf_ROK) {
1941 if (dtype >= SVt_PV) {
1942 if (dtype == SVt_PVGV) {
1943 SV *sref = SvREFCNT_inc(SvRV(sstr));
1945 int intro = GvINTRO(dstr);
1949 GvGP(dstr)->gp_refcnt--;
1950 GvINTRO_off(dstr); /* one-shot flag */
1951 Newz(602,gp, 1, GP);
1952 GvGP(dstr) = gp_ref(gp);
1953 GvSV(dstr) = NEWSV(72,0);
1954 GvLINE(dstr) = PL_curcop->cop_line;
1955 GvEGV(dstr) = (GV*)dstr;
1958 switch (SvTYPE(sref)) {
1961 SAVESPTR(GvAV(dstr));
1963 dref = (SV*)GvAV(dstr);
1964 GvAV(dstr) = (AV*)sref;
1965 if (PL_curcop->cop_stash != GvSTASH(dstr))
1966 GvIMPORTED_AV_on(dstr);
1970 SAVESPTR(GvHV(dstr));
1972 dref = (SV*)GvHV(dstr);
1973 GvHV(dstr) = (HV*)sref;
1974 if (PL_curcop->cop_stash != GvSTASH(dstr))
1975 GvIMPORTED_HV_on(dstr);
1979 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
1980 SvREFCNT_dec(GvCV(dstr));
1981 GvCV(dstr) = Nullcv;
1982 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
1983 PL_sub_generation++;
1985 SAVESPTR(GvCV(dstr));
1988 dref = (SV*)GvCV(dstr);
1989 if (GvCV(dstr) != (CV*)sref) {
1990 CV* cv = GvCV(dstr);
1992 if (!GvCVGEN((GV*)dstr) &&
1993 (CvROOT(cv) || CvXSUB(cv)))
1995 SV *const_sv = cv_const_sv(cv);
1996 bool const_changed = TRUE;
1998 const_changed = sv_cmp(const_sv,
1999 op_const_sv(CvSTART((CV*)sref),
2001 /* ahem, death to those who redefine
2002 * active sort subs */
2003 if (PL_curstackinfo->si_type == PERLSI_SORT &&
2004 PL_sortcop == CvSTART(cv))
2006 "Can't redefine active sort subroutine %s",
2007 GvENAME((GV*)dstr));
2008 if (ckWARN(WARN_REDEFINE) || (const_changed && const_sv)) {
2009 if (!(CvGV(cv) && GvSTASH(CvGV(cv))
2010 && HvNAME(GvSTASH(CvGV(cv)))
2011 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
2013 warner(WARN_REDEFINE, const_sv ?
2014 "Constant subroutine %s redefined"
2015 : "Subroutine %s redefined",
2016 GvENAME((GV*)dstr));
2019 cv_ckproto(cv, (GV*)dstr,
2020 SvPOK(sref) ? SvPVX(sref) : Nullch);
2022 GvCV(dstr) = (CV*)sref;
2023 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
2024 GvASSUMECV_on(dstr);
2025 PL_sub_generation++;
2027 if (PL_curcop->cop_stash != GvSTASH(dstr))
2028 GvIMPORTED_CV_on(dstr);
2032 SAVESPTR(GvIOp(dstr));
2034 dref = (SV*)GvIOp(dstr);
2035 GvIOp(dstr) = (IO*)sref;
2039 SAVESPTR(GvSV(dstr));
2041 dref = (SV*)GvSV(dstr);
2043 if (PL_curcop->cop_stash != GvSTASH(dstr))
2044 GvIMPORTED_SV_on(dstr);
2055 (void)SvOOK_off(dstr); /* backoff */
2056 Safefree(SvPVX(dstr));
2057 SvLEN(dstr)=SvCUR(dstr)=0;
2060 (void)SvOK_off(dstr);
2061 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
2063 if (sflags & SVp_NOK) {
2065 SvNVX(dstr) = SvNVX(sstr);
2067 if (sflags & SVp_IOK) {
2068 (void)SvIOK_on(dstr);
2069 SvIVX(dstr) = SvIVX(sstr);
2071 if (SvAMAGIC(sstr)) {
2075 else if (sflags & SVp_POK) {
2078 * Check to see if we can just swipe the string. If so, it's a
2079 * possible small lose on short strings, but a big win on long ones.
2080 * It might even be a win on short strings if SvPVX(dstr)
2081 * has to be allocated and SvPVX(sstr) has to be freed.
2084 if (SvTEMP(sstr) && /* slated for free anyway? */
2085 SvREFCNT(sstr) == 1 && /* and no other references to it? */
2086 !(sflags & SVf_OOK)) /* and not involved in OOK hack? */
2088 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
2090 SvFLAGS(dstr) &= ~SVf_OOK;
2091 Safefree(SvPVX(dstr) - SvIVX(dstr));
2094 Safefree(SvPVX(dstr));
2096 (void)SvPOK_only(dstr);
2097 SvPV_set(dstr, SvPVX(sstr));
2098 SvLEN_set(dstr, SvLEN(sstr));
2099 SvCUR_set(dstr, SvCUR(sstr));
2101 (void)SvOK_off(sstr);
2102 SvPV_set(sstr, Nullch);
2107 else { /* have to copy actual string */
2108 STRLEN len = SvCUR(sstr);
2110 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
2111 Move(SvPVX(sstr),SvPVX(dstr),len,char);
2112 SvCUR_set(dstr, len);
2113 *SvEND(dstr) = '\0';
2114 (void)SvPOK_only(dstr);
2117 if (sflags & SVp_NOK) {
2119 SvNVX(dstr) = SvNVX(sstr);
2121 if (sflags & SVp_IOK) {
2122 (void)SvIOK_on(dstr);
2123 SvIVX(dstr) = SvIVX(sstr);
2126 else if (sflags & SVp_NOK) {
2127 SvNVX(dstr) = SvNVX(sstr);
2128 (void)SvNOK_only(dstr);
2130 (void)SvIOK_on(dstr);
2131 SvIVX(dstr) = SvIVX(sstr);
2134 else if (sflags & SVp_IOK) {
2135 (void)SvIOK_only(dstr);
2136 SvIVX(dstr) = SvIVX(sstr);
2139 if (dtype == SVt_PVGV) {
2140 if (ckWARN(WARN_UNSAFE))
2141 warner(WARN_UNSAFE, "Undefined value assigned to typeglob");
2144 (void)SvOK_off(dstr);
2150 sv_setsv_mg(SV *dstr, register SV *sstr)
2152 sv_setsv(dstr,sstr);
2157 sv_setpvn(register SV *sv, register const char *ptr, register STRLEN len)
2159 register char *dptr;
2160 assert(len >= 0); /* STRLEN is probably unsigned, so this may
2161 elicit a warning, but it won't hurt. */
2162 SV_CHECK_THINKFIRST(sv);
2167 (void)SvUPGRADE(sv, SVt_PV);
2169 SvGROW(sv, len + 1);
2171 Move(ptr,dptr,len,char);
2174 (void)SvPOK_only(sv); /* validate pointer */
2179 sv_setpvn_mg(register SV *sv, register const char *ptr, register STRLEN len)
2181 sv_setpvn(sv,ptr,len);
2186 sv_setpv(register SV *sv, register const char *ptr)
2188 register STRLEN len;
2190 SV_CHECK_THINKFIRST(sv);
2196 (void)SvUPGRADE(sv, SVt_PV);
2198 SvGROW(sv, len + 1);
2199 Move(ptr,SvPVX(sv),len+1,char);
2201 (void)SvPOK_only(sv); /* validate pointer */
2206 sv_setpv_mg(register SV *sv, register const char *ptr)
2213 sv_usepvn(register SV *sv, register char *ptr, register STRLEN len)
2215 SV_CHECK_THINKFIRST(sv);
2216 (void)SvUPGRADE(sv, SVt_PV);
2221 (void)SvOOK_off(sv);
2223 Safefree(SvPVX(sv));
2224 Renew(ptr, len+1, char);
2227 SvLEN_set(sv, len+1);
2229 (void)SvPOK_only(sv); /* validate pointer */
2234 sv_usepvn_mg(register SV *sv, register char *ptr, register STRLEN len)
2236 sv_usepvn(sv,ptr,len);
2241 sv_force_normal(register SV *sv)
2243 if (SvREADONLY(sv)) {
2245 if (PL_curcop != &PL_compiling)
2246 croak(PL_no_modify);
2250 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
2255 sv_chop(register SV *sv, register char *ptr) /* like set but assuming ptr is in sv */
2259 register STRLEN delta;
2261 if (!ptr || !SvPOKp(sv))
2263 SV_CHECK_THINKFIRST(sv);
2264 if (SvTYPE(sv) < SVt_PVIV)
2265 sv_upgrade(sv,SVt_PVIV);
2269 SvFLAGS(sv) |= SVf_OOK;
2271 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK);
2272 delta = ptr - SvPVX(sv);
2280 sv_catpvn(register SV *sv, register const char *ptr, register STRLEN len)
2285 junk = SvPV_force(sv, tlen);
2286 SvGROW(sv, tlen + len + 1);
2289 Move(ptr,SvPVX(sv)+tlen,len,char);
2292 (void)SvPOK_only(sv); /* validate pointer */
2297 sv_catpvn_mg(register SV *sv, register const char *ptr, register STRLEN len)
2299 sv_catpvn(sv,ptr,len);
2304 sv_catsv(SV *dstr, register SV *sstr)
2310 if (s = SvPV(sstr, len))
2311 sv_catpvn(dstr,s,len);
2315 sv_catsv_mg(SV *dstr, register SV *sstr)
2317 sv_catsv(dstr,sstr);
2322 sv_catpv(register SV *sv, register const char *ptr)
2324 register STRLEN len;
2330 junk = SvPV_force(sv, tlen);
2332 SvGROW(sv, tlen + len + 1);
2335 Move(ptr,SvPVX(sv)+tlen,len+1,char);
2337 (void)SvPOK_only(sv); /* validate pointer */
2342 sv_catpv_mg(register SV *sv, register const char *ptr)
2358 sv_upgrade(sv, SVt_PV);
2359 SvGROW(sv, len + 1);
2364 /* name is assumed to contain an SV* if (name && namelen == HEf_SVKEY) */
2367 sv_magic(register SV *sv, SV *obj, int how, const char *name, I32 namlen)
2371 if (SvREADONLY(sv)) {
2373 if (PL_curcop != &PL_compiling && !strchr("gBf", how))
2374 croak(PL_no_modify);
2376 if (SvMAGICAL(sv) || (how == 't' && SvTYPE(sv) >= SVt_PVMG)) {
2377 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
2384 (void)SvUPGRADE(sv, SVt_PVMG);
2386 Newz(702,mg, 1, MAGIC);
2387 mg->mg_moremagic = SvMAGIC(sv);
2390 if (!obj || obj == sv || how == '#' || how == 'r')
2394 mg->mg_obj = SvREFCNT_inc(obj);
2395 mg->mg_flags |= MGf_REFCOUNTED;
2398 mg->mg_len = namlen;
2401 mg->mg_ptr = savepvn(name, namlen);
2402 else if (namlen == HEf_SVKEY)
2403 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
2407 mg->mg_virtual = &PL_vtbl_sv;
2410 mg->mg_virtual = &PL_vtbl_amagic;
2413 mg->mg_virtual = &PL_vtbl_amagicelem;
2419 mg->mg_virtual = &PL_vtbl_bm;
2422 mg->mg_virtual = &PL_vtbl_regdata;
2425 mg->mg_virtual = &PL_vtbl_regdatum;
2428 mg->mg_virtual = &PL_vtbl_env;
2431 mg->mg_virtual = &PL_vtbl_fm;
2434 mg->mg_virtual = &PL_vtbl_envelem;
2437 mg->mg_virtual = &PL_vtbl_mglob;
2440 mg->mg_virtual = &PL_vtbl_isa;
2443 mg->mg_virtual = &PL_vtbl_isaelem;
2446 mg->mg_virtual = &PL_vtbl_nkeys;
2453 mg->mg_virtual = &PL_vtbl_dbline;
2457 mg->mg_virtual = &PL_vtbl_mutex;
2459 #endif /* USE_THREADS */
2460 #ifdef USE_LOCALE_COLLATE
2462 mg->mg_virtual = &PL_vtbl_collxfrm;
2464 #endif /* USE_LOCALE_COLLATE */
2466 mg->mg_virtual = &PL_vtbl_pack;
2470 mg->mg_virtual = &PL_vtbl_packelem;
2473 mg->mg_virtual = &PL_vtbl_regexp;
2476 mg->mg_virtual = &PL_vtbl_sig;
2479 mg->mg_virtual = &PL_vtbl_sigelem;
2482 mg->mg_virtual = &PL_vtbl_taint;
2486 mg->mg_virtual = &PL_vtbl_uvar;
2489 mg->mg_virtual = &PL_vtbl_vec;
2492 mg->mg_virtual = &PL_vtbl_substr;
2495 mg->mg_virtual = &PL_vtbl_defelem;
2498 mg->mg_virtual = &PL_vtbl_glob;
2501 mg->mg_virtual = &PL_vtbl_arylen;
2504 mg->mg_virtual = &PL_vtbl_pos;
2506 case '~': /* Reserved for use by extensions not perl internals. */
2507 /* Useful for attaching extension internal data to perl vars. */
2508 /* Note that multiple extensions may clash if magical scalars */
2509 /* etc holding private data from one are passed to another. */
2513 croak("Don't know how to handle magic of type '%c'", how);
2517 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
2521 sv_unmagic(SV *sv, int type)
2525 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
2528 for (mg = *mgp; mg; mg = *mgp) {
2529 if (mg->mg_type == type) {
2530 MGVTBL* vtbl = mg->mg_virtual;
2531 *mgp = mg->mg_moremagic;
2532 if (vtbl && (vtbl->svt_free != NULL))
2533 (VTBL->svt_free)(sv, mg);
2534 if (mg->mg_ptr && mg->mg_type != 'g')
2535 if (mg->mg_len >= 0)
2536 Safefree(mg->mg_ptr);
2537 else if (mg->mg_len == HEf_SVKEY)
2538 SvREFCNT_dec((SV*)mg->mg_ptr);
2539 if (mg->mg_flags & MGf_REFCOUNTED)
2540 SvREFCNT_dec(mg->mg_obj);
2544 mgp = &mg->mg_moremagic;
2548 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
2555 sv_insert(SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
2559 register char *midend;
2560 register char *bigend;
2566 croak("Can't modify non-existent substring");
2567 SvPV_force(bigstr, curlen);
2568 if (offset + len > curlen) {
2569 SvGROW(bigstr, offset+len+1);
2570 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
2571 SvCUR_set(bigstr, offset+len);
2574 i = littlelen - len;
2575 if (i > 0) { /* string might grow */
2576 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
2577 mid = big + offset + len;
2578 midend = bigend = big + SvCUR(bigstr);
2581 while (midend > mid) /* shove everything down */
2582 *--bigend = *--midend;
2583 Move(little,big+offset,littlelen,char);
2589 Move(little,SvPVX(bigstr)+offset,len,char);
2594 big = SvPVX(bigstr);
2597 bigend = big + SvCUR(bigstr);
2599 if (midend > bigend)
2600 croak("panic: sv_insert");
2602 if (mid - big > bigend - midend) { /* faster to shorten from end */
2604 Move(little, mid, littlelen,char);
2607 i = bigend - midend;
2609 Move(midend, mid, i,char);
2613 SvCUR_set(bigstr, mid - big);
2616 else if (i = mid - big) { /* faster from front */
2617 midend -= littlelen;
2619 sv_chop(bigstr,midend-i);
2624 Move(little, mid, littlelen,char);
2626 else if (littlelen) {
2627 midend -= littlelen;
2628 sv_chop(bigstr,midend);
2629 Move(little,midend,littlelen,char);
2632 sv_chop(bigstr,midend);
2637 /* make sv point to what nstr did */
2640 sv_replace(register SV *sv, register SV *nsv)
2642 U32 refcnt = SvREFCNT(sv);
2643 SV_CHECK_THINKFIRST(sv);
2644 if (SvREFCNT(nsv) != 1)
2645 warn("Reference miscount in sv_replace()");
2646 if (SvMAGICAL(sv)) {
2650 sv_upgrade(nsv, SVt_PVMG);
2651 SvMAGIC(nsv) = SvMAGIC(sv);
2652 SvFLAGS(nsv) |= SvMAGICAL(sv);
2658 assert(!SvREFCNT(sv));
2659 StructCopy(nsv,sv,SV);
2660 SvREFCNT(sv) = refcnt;
2661 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
2666 sv_clear(register SV *sv)
2670 assert(SvREFCNT(sv) == 0);
2674 if (PL_defstash) { /* Still have a symbol table? */
2679 Zero(&tmpref, 1, SV);
2680 sv_upgrade(&tmpref, SVt_RV);
2682 SvREADONLY_on(&tmpref); /* DESTROY() could be naughty */
2683 SvREFCNT(&tmpref) = 1;
2686 stash = SvSTASH(sv);
2687 destructor = gv_fetchmethod(SvSTASH(sv), "DESTROY");
2690 PUSHSTACKi(PERLSI_DESTROY);
2691 SvRV(&tmpref) = SvREFCNT_inc(sv);
2696 perl_call_sv((SV*)GvCV(destructor),
2697 G_DISCARD|G_EVAL|G_KEEPERR);
2703 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
2705 del_XRV(SvANY(&tmpref));
2708 if (PL_in_clean_objs)
2709 croak("DESTROY created new reference to dead object '%s'",
2711 /* DESTROY gave object new lease on life */
2717 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
2718 SvOBJECT_off(sv); /* Curse the object. */
2719 if (SvTYPE(sv) != SVt_PVIO)
2720 --PL_sv_objcount; /* XXX Might want something more general */
2723 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
2726 switch (SvTYPE(sv)) {
2729 IoIFP(sv) != PerlIO_stdin() &&
2730 IoIFP(sv) != PerlIO_stdout() &&
2731 IoIFP(sv) != PerlIO_stderr())
2733 Safefree(IoTOP_NAME(sv));
2734 Safefree(IoFMT_NAME(sv));
2735 Safefree(IoBOTTOM_NAME(sv));
2750 SvREFCNT_dec(LvTARG(sv));
2754 Safefree(GvNAME(sv));
2755 /* cannot decrease stash refcount yet, as we might recursively delete
2756 ourselves when the refcnt drops to zero. Delay SvREFCNT_dec
2757 of stash until current sv is completely gone.
2758 -- JohnPC, 27 Mar 1998 */
2759 stash = GvSTASH(sv);
2765 (void)SvOOK_off(sv);
2770 SvREFCNT_dec(SvRV(sv));
2771 else if (SvPVX(sv) && SvLEN(sv))
2772 Safefree(SvPVX(sv));
2782 switch (SvTYPE(sv)) {
2798 del_XPVIV(SvANY(sv));
2801 del_XPVNV(SvANY(sv));
2804 del_XPVMG(SvANY(sv));
2807 del_XPVLV(SvANY(sv));
2810 del_XPVAV(SvANY(sv));
2813 del_XPVHV(SvANY(sv));
2816 del_XPVCV(SvANY(sv));
2819 del_XPVGV(SvANY(sv));
2820 /* code duplication for increased performance. */
2821 SvFLAGS(sv) &= SVf_BREAK;
2822 SvFLAGS(sv) |= SVTYPEMASK;
2823 /* decrease refcount of the stash that owns this GV, if any */
2825 SvREFCNT_dec(stash);
2826 return; /* not break, SvFLAGS reset already happened */
2828 del_XPVBM(SvANY(sv));
2831 del_XPVFM(SvANY(sv));
2834 del_XPVIO(SvANY(sv));
2837 SvFLAGS(sv) &= SVf_BREAK;
2838 SvFLAGS(sv) |= SVTYPEMASK;
2845 ATOMIC_INC(SvREFCNT(sv));
2852 int refcount_is_zero;
2856 if (SvREFCNT(sv) == 0) {
2857 if (SvFLAGS(sv) & SVf_BREAK)
2859 if (PL_in_clean_all) /* All is fair */
2861 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
2862 /* make sure SvREFCNT(sv)==0 happens very seldom */
2863 SvREFCNT(sv) = (~(U32)0)/2;
2866 warn("Attempt to free unreferenced scalar");
2869 ATOMIC_DEC_AND_TEST(refcount_is_zero, SvREFCNT(sv));
2870 if (!refcount_is_zero)
2874 warn("Attempt to free temp prematurely: SV 0x%lx", (unsigned long)sv);
2878 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
2879 /* make sure SvREFCNT(sv)==0 happens very seldom */
2880 SvREFCNT(sv) = (~(U32)0)/2;
2889 sv_len(register SV *sv)
2898 len = mg_length(sv);
2900 junk = SvPV(sv, len);
2905 sv_len_utf8(register SV *sv)
2916 len = mg_length(sv);
2919 s = (U8*)SvPV(sv, len);
2930 sv_pos_u2b(register SV *sv, I32* offsetp, I32* lenp)
2935 I32 uoffset = *offsetp;
2941 start = s = (U8*)SvPV(sv, len);
2943 while (s < send && uoffset--)
2947 *offsetp = s - start;
2951 while (s < send && ulen--)
2961 sv_pos_b2u(register SV *sv, I32* offsetp)
2970 s = (U8*)SvPV(sv, len);
2972 croak("panic: bad byte offset");
2973 send = s + *offsetp;
2980 warn("Malformed UTF-8 character");
2988 sv_eq(register SV *str1, register SV *str2)
3000 pv1 = SvPV(str1, cur1);
3005 pv2 = SvPV(str2, cur2);
3010 return memEQ(pv1, pv2, cur1);
3014 sv_cmp(register SV *str1, register SV *str2)
3017 char *pv1 = str1 ? SvPV(str1, cur1) : (char *) NULL;
3019 char *pv2 = str2 ? SvPV(str2, cur2) : (char *) NULL;
3023 return cur2 ? -1 : 0;
3028 retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2);
3031 return retval < 0 ? -1 : 1;
3036 return cur1 < cur2 ? -1 : 1;
3040 sv_cmp_locale(register SV *sv1, register SV *sv2)
3042 #ifdef USE_LOCALE_COLLATE
3048 if (PL_collation_standard)
3052 pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL;
3054 pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL;
3056 if (!pv1 || !len1) {
3067 retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2);
3070 return retval < 0 ? -1 : 1;
3073 * When the result of collation is equality, that doesn't mean
3074 * that there are no differences -- some locales exclude some
3075 * characters from consideration. So to avoid false equalities,
3076 * we use the raw string as a tiebreaker.
3082 #endif /* USE_LOCALE_COLLATE */
3084 return sv_cmp(sv1, sv2);
3087 #ifdef USE_LOCALE_COLLATE
3089 * Any scalar variable may carry an 'o' magic that contains the
3090 * scalar data of the variable transformed to such a format that
3091 * a normal memory comparison can be used to compare the data
3092 * according to the locale settings.
3095 sv_collxfrm(SV *sv, STRLEN *nxp)
3099 mg = SvMAGICAL(sv) ? mg_find(sv, 'o') : (MAGIC *) NULL;
3100 if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) {
3105 Safefree(mg->mg_ptr);
3107 if ((xf = mem_collxfrm(s, len, &xlen))) {
3108 if (SvREADONLY(sv)) {
3111 return xf + sizeof(PL_collation_ix);
3114 sv_magic(sv, 0, 'o', 0, 0);
3115 mg = mg_find(sv, 'o');
3128 if (mg && mg->mg_ptr) {
3130 return mg->mg_ptr + sizeof(PL_collation_ix);
3138 #endif /* USE_LOCALE_COLLATE */
3141 sv_gets(register SV *sv, register PerlIO *fp, I32 append)
3146 register STDCHAR rslast;
3147 register STDCHAR *bp;
3151 SV_CHECK_THINKFIRST(sv);
3152 (void)SvUPGRADE(sv, SVt_PV);
3156 if (RsSNARF(PL_rs)) {
3160 else if (RsRECORD(PL_rs)) {
3161 I32 recsize, bytesread;
3164 /* Grab the size of the record we're getting */
3165 recsize = SvIV(SvRV(PL_rs));
3166 (void)SvPOK_only(sv); /* Validate pointer */
3167 buffer = SvGROW(sv, recsize + 1);
3170 /* VMS wants read instead of fread, because fread doesn't respect */
3171 /* RMS record boundaries. This is not necessarily a good thing to be */
3172 /* doing, but we've got no other real choice */
3173 bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize);
3175 bytesread = PerlIO_read(fp, buffer, recsize);
3177 SvCUR_set(sv, bytesread);
3178 buffer[bytesread] = '\0';
3179 return(SvCUR(sv) ? SvPVX(sv) : Nullch);
3181 else if (RsPARA(PL_rs)) {
3186 rsptr = SvPV(PL_rs, rslen);
3187 rslast = rslen ? rsptr[rslen - 1] : '\0';
3189 if (RsPARA(PL_rs)) { /* have to do this both before and after */
3190 do { /* to make sure file boundaries work right */
3193 i = PerlIO_getc(fp);
3197 PerlIO_ungetc(fp,i);
3203 /* See if we know enough about I/O mechanism to cheat it ! */
3205 /* This used to be #ifdef test - it is made run-time test for ease
3206 of abstracting out stdio interface. One call should be cheap
3207 enough here - and may even be a macro allowing compile
3211 if (PerlIO_fast_gets(fp)) {
3214 * We're going to steal some values from the stdio struct
3215 * and put EVERYTHING in the innermost loop into registers.
3217 register STDCHAR *ptr;
3221 #if defined(VMS) && defined(PERLIO_IS_STDIO)
3222 /* An ungetc()d char is handled separately from the regular
3223 * buffer, so we getc() it back out and stuff it in the buffer.
3225 i = PerlIO_getc(fp);
3226 if (i == EOF) return 0;
3227 *(--((*fp)->_ptr)) = (unsigned char) i;
3231 /* Here is some breathtakingly efficient cheating */
3233 cnt = PerlIO_get_cnt(fp); /* get count into register */
3234 (void)SvPOK_only(sv); /* validate pointer */
3235 if (SvLEN(sv) - append <= cnt + 1) { /* make sure we have the room */
3236 if (cnt > 80 && SvLEN(sv) > append) {
3237 shortbuffered = cnt - SvLEN(sv) + append + 1;
3238 cnt -= shortbuffered;
3242 /* remember that cnt can be negative */
3243 SvGROW(sv, append + (cnt <= 0 ? 2 : (cnt + 1)));
3248 bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */
3249 ptr = (STDCHAR*)PerlIO_get_ptr(fp);
3250 DEBUG_P(PerlIO_printf(Perl_debug_log,
3251 "Screamer: entering, ptr=%ld, cnt=%ld\n",(long)ptr,(long)cnt));
3252 DEBUG_P(PerlIO_printf(Perl_debug_log,
3253 "Screamer: entering: FILE * thinks ptr=%ld, cnt=%ld, base=%ld\n",
3254 (long)PerlIO_get_ptr(fp), (long)PerlIO_get_cnt(fp),
3255 (long)(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0)));
3260 while (cnt > 0) { /* this | eat */
3262 if ((*bp++ = *ptr++) == rslast) /* really | dust */
3263 goto thats_all_folks; /* screams | sed :-) */
3267 Copy(ptr, bp, cnt, char); /* this | eat */
3268 bp += cnt; /* screams | dust */
3269 ptr += cnt; /* louder | sed :-) */
3274 if (shortbuffered) { /* oh well, must extend */
3275 cnt = shortbuffered;
3277 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
3279 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
3280 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
3284 DEBUG_P(PerlIO_printf(Perl_debug_log,
3285 "Screamer: going to getc, ptr=%ld, cnt=%ld\n",(long)ptr,(long)cnt));
3286 PerlIO_set_ptrcnt(fp, ptr, cnt); /* deregisterize cnt and ptr */
3287 DEBUG_P(PerlIO_printf(Perl_debug_log,
3288 "Screamer: pre: FILE * thinks ptr=%ld, cnt=%ld, base=%ld\n",
3289 (long)PerlIO_get_ptr(fp), (long)PerlIO_get_cnt(fp),
3290 (long)(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
3291 /* This used to call 'filbuf' in stdio form, but as that behaves like
3292 getc when cnt <= 0 we use PerlIO_getc here to avoid introducing
3293 another abstraction. */
3294 i = PerlIO_getc(fp); /* get more characters */
3295 DEBUG_P(PerlIO_printf(Perl_debug_log,
3296 "Screamer: post: FILE * thinks ptr=%ld, cnt=%ld, base=%ld\n",
3297 (long)PerlIO_get_ptr(fp), (long)PerlIO_get_cnt(fp),
3298 (long)(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
3299 cnt = PerlIO_get_cnt(fp);
3300 ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */
3301 DEBUG_P(PerlIO_printf(Perl_debug_log,
3302 "Screamer: after getc, ptr=%ld, cnt=%ld\n",(long)ptr,(long)cnt));
3304 if (i == EOF) /* all done for ever? */
3305 goto thats_really_all_folks;
3307 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
3309 SvGROW(sv, bpx + cnt + 2);
3310 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
3312 *bp++ = i; /* store character from PerlIO_getc */
3314 if (rslen && (STDCHAR)i == rslast) /* all done for now? */
3315 goto thats_all_folks;
3319 if ((rslen > 1 && (bp - (STDCHAR*)SvPVX(sv) < rslen)) ||
3320 memNE((char*)bp - rslen, rsptr, rslen))
3321 goto screamer; /* go back to the fray */
3322 thats_really_all_folks:
3324 cnt += shortbuffered;
3325 DEBUG_P(PerlIO_printf(Perl_debug_log,
3326 "Screamer: quitting, ptr=%ld, cnt=%ld\n",(long)ptr,(long)cnt));
3327 PerlIO_set_ptrcnt(fp, ptr, cnt); /* put these back or we're in trouble */
3328 DEBUG_P(PerlIO_printf(Perl_debug_log,
3329 "Screamer: end: FILE * thinks ptr=%ld, cnt=%ld, base=%ld\n",
3330 (long)PerlIO_get_ptr(fp), (long)PerlIO_get_cnt(fp),
3331 (long)(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
3333 SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */
3334 DEBUG_P(PerlIO_printf(Perl_debug_log,
3335 "Screamer: done, len=%ld, string=|%.*s|\n",
3336 (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv)));
3340 /*The big, slow, and stupid way */
3345 register STDCHAR *bpe = buf + sizeof(buf);
3347 while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = i) != rslast && bp < bpe)
3348 ; /* keep reading */
3352 cnt = PerlIO_read(fp,(char*)buf, sizeof(buf));
3353 /* Accomodate broken VAXC compiler, which applies U8 cast to
3354 * both args of ?: operator, causing EOF to change into 255
3356 if (cnt) { i = (U8)buf[cnt - 1]; } else { i = EOF; }
3360 sv_catpvn(sv, (char *) buf, cnt);
3362 sv_setpvn(sv, (char *) buf, cnt);
3364 if (i != EOF && /* joy */
3366 SvCUR(sv) < rslen ||
3367 memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen)))
3371 * If we're reading from a TTY and we get a short read,
3372 * indicating that the user hit his EOF character, we need
3373 * to notice it now, because if we try to read from the TTY
3374 * again, the EOF condition will disappear.
3376 * The comparison of cnt to sizeof(buf) is an optimization
3377 * that prevents unnecessary calls to feof().
3381 if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
3386 if (RsPARA(PL_rs)) { /* have to do this both before and after */
3387 while (i != EOF) { /* to make sure file boundaries work right */
3388 i = PerlIO_getc(fp);
3390 PerlIO_ungetc(fp,i);
3397 win32_strip_return(sv);
3400 return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch;
3405 sv_inc(register SV *sv)
3414 if (SvTHINKFIRST(sv)) {
3415 if (SvREADONLY(sv)) {
3417 if (PL_curcop != &PL_compiling)
3418 croak(PL_no_modify);
3422 if (SvAMAGIC(sv) && AMG_CALLun(sv,inc))
3429 flags = SvFLAGS(sv);
3430 if (flags & SVp_NOK) {
3431 (void)SvNOK_only(sv);
3435 if (flags & SVp_IOK) {
3436 if (SvIVX(sv) == IV_MAX)
3437 sv_setnv(sv, (double)IV_MAX + 1.0);
3439 (void)SvIOK_only(sv);
3444 if (!(flags & SVp_POK) || !*SvPVX(sv)) {
3445 if ((flags & SVTYPEMASK) < SVt_PVNV)
3446 sv_upgrade(sv, SVt_NV);
3448 (void)SvNOK_only(sv);
3452 while (isALPHA(*d)) d++;
3453 while (isDIGIT(*d)) d++;
3455 SET_NUMERIC_STANDARD();
3456 sv_setnv(sv,atof(SvPVX(sv)) + 1.0); /* punt */
3460 while (d >= SvPVX(sv)) {
3468 /* MKS: The original code here died if letters weren't consecutive.
3469 * at least it didn't have to worry about non-C locales. The
3470 * new code assumes that ('z'-'a')==('Z'-'A'), letters are
3471 * arranged in order (although not consecutively) and that only
3472 * [A-Za-z] are accepted by isALPHA in the C locale.
3474 if (*d != 'z' && *d != 'Z') {
3475 do { ++*d; } while (!isALPHA(*d));
3478 *(d--) -= 'z' - 'a';
3483 *(d--) -= 'z' - 'a' + 1;
3487 /* oh,oh, the number grew */
3488 SvGROW(sv, SvCUR(sv) + 2);
3490 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
3499 sv_dec(register SV *sv)
3507 if (SvTHINKFIRST(sv)) {
3508 if (SvREADONLY(sv)) {
3510 if (PL_curcop != &PL_compiling)
3511 croak(PL_no_modify);
3515 if (SvAMAGIC(sv) && AMG_CALLun(sv,dec))
3522 flags = SvFLAGS(sv);
3523 if (flags & SVp_NOK) {
3525 (void)SvNOK_only(sv);
3528 if (flags & SVp_IOK) {
3529 if (SvIVX(sv) == IV_MIN)
3530 sv_setnv(sv, (double)IV_MIN - 1.0);
3532 (void)SvIOK_only(sv);
3537 if (!(flags & SVp_POK)) {
3538 if ((flags & SVTYPEMASK) < SVt_PVNV)
3539 sv_upgrade(sv, SVt_NV);
3541 (void)SvNOK_only(sv);
3544 SET_NUMERIC_STANDARD();
3545 sv_setnv(sv,atof(SvPVX(sv)) - 1.0); /* punt */
3548 /* Make a string that will exist for the duration of the expression
3549 * evaluation. Actually, it may have to last longer than that, but
3550 * hopefully we won't free it until it has been assigned to a
3551 * permanent location. */
3554 sv_mortalcopy(SV *oldstr)
3563 sv_setsv(sv,oldstr);
3565 PL_tmps_stack[++PL_tmps_ix] = sv;
3579 SvFLAGS(sv) = SVs_TEMP;
3581 PL_tmps_stack[++PL_tmps_ix] = sv;
3585 /* same thing without the copying */
3588 sv_2mortal(register SV *sv)
3593 if (SvREADONLY(sv) && SvIMMORTAL(sv))
3596 PL_tmps_stack[++PL_tmps_ix] = sv;
3602 newSVpv(const char *s, STRLEN len)
3612 sv_setpvn(sv,s,len);
3617 newSVpvn(const char *s, STRLEN len)
3625 sv_setpvn(sv,s,len);
3630 newSVpvf(const char* pat, ...)
3639 va_start(args, pat);
3640 sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
3673 newRV_noinc(SV *tmpRef)
3682 sv_upgrade(sv, SVt_RV);
3692 return newRV_noinc(SvREFCNT_inc(tmpRef));
3695 /* make an exact duplicate of old */
3698 newSVsv(register SV *old)
3704 if (SvTYPE(old) == SVTYPEMASK) {
3705 warn("semi-panic: attempt to dup freed string");
3723 sv_reset(register char *s, HV *stash)
3736 if (!*s) { /* reset ?? searches */
3737 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
3738 pm->op_pmdynflags &= ~PMdf_USED;
3743 /* reset variables */
3745 if (!HvARRAY(stash))
3748 Zero(todo, 256, char);
3755 for ( ; i <= max; i++) {
3758 for (i = 0; i <= (I32) HvMAX(stash); i++) {
3759 for (entry = HvARRAY(stash)[i];
3761 entry = HeNEXT(entry))
3763 if (!todo[(U8)*HeKEY(entry)])
3765 gv = (GV*)HeVAL(entry);
3767 if (SvTHINKFIRST(sv)) {
3768 if (!SvREADONLY(sv) && SvROK(sv))
3773 if (SvTYPE(sv) >= SVt_PV) {
3775 if (SvPVX(sv) != Nullch)
3782 if (GvHV(gv) && !HvNAME(GvHV(gv))) {
3784 #ifndef VMS /* VMS has no environ array */
3786 environ[0] = Nullch;
3801 switch (SvTYPE(sv)) {
3809 croak("Bad filehandle: %s", GvNAME(gv));
3813 croak(PL_no_usym, "filehandle");
3815 return sv_2io(SvRV(sv));
3816 gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO);
3822 croak("Bad filehandle: %s", SvPV(sv,n_a));
3829 sv_2cv(SV *sv, HV **st, GV **gvp, I32 lref)
3836 return *gvp = Nullgv, Nullcv;
3837 switch (SvTYPE(sv)) {
3857 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
3858 tryAMAGICunDEREF(to_cv);
3861 if (SvTYPE(sv) == SVt_PVCV) {
3870 croak("Not a subroutine reference");
3875 gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV);
3881 if (lref && !GvCVu(gv)) {
3884 tmpsv = NEWSV(704,0);
3885 gv_efullname3(tmpsv, gv, Nullch);
3886 newSUB(start_subparse(FALSE, 0),
3887 newSVOP(OP_CONST, 0, tmpsv),
3892 croak("Unable to create sub named \"%s\"", SvPV(sv,n_a));
3899 sv_true(register SV *sv)
3906 if ((tXpv = (XPV*)SvANY(sv)) &&
3907 (*tXpv->xpv_pv > '0' ||
3908 tXpv->xpv_cur > 1 ||
3909 (tXpv->xpv_cur && *tXpv->xpv_pv != '0')))
3916 return SvIVX(sv) != 0;
3919 return SvNVX(sv) != 0.0;
3921 return sv_2bool(sv);
3927 sv_iv(register SV *sv)
3935 sv_uv(register SV *sv)
3943 sv_nv(register SV *sv)
3958 return sv_2pv(sv, &n_a);
3962 sv_pvn(SV *sv, STRLEN *lp)
3968 return sv_2pv(sv, lp);
3972 sv_pvn_force(SV *sv, STRLEN *lp)
3976 if (SvTHINKFIRST(sv) && !SvROK(sv))
3977 sv_force_normal(sv);
3983 if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) {
3985 croak("Can't coerce %s to string in %s", sv_reftype(sv,0),
3986 PL_op_name[PL_op->op_type]);
3990 if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */
3995 (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */
3996 SvGROW(sv, len + 1);
3997 Move(s,SvPVX(sv),len,char);
4002 SvPOK_on(sv); /* validate pointer */
4004 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2pv(%s)\n",
4005 (unsigned long)sv,SvPVX(sv)));
4012 sv_reftype(SV *sv, int ob)
4014 if (ob && SvOBJECT(sv))
4015 return HvNAME(SvSTASH(sv));
4017 switch (SvTYPE(sv)) {
4031 case SVt_PVLV: return "LVALUE";
4032 case SVt_PVAV: return "ARRAY";
4033 case SVt_PVHV: return "HASH";
4034 case SVt_PVCV: return "CODE";
4035 case SVt_PVGV: return "GLOB";
4036 case SVt_PVFM: return "FORMAT";
4037 default: return "UNKNOWN";
4058 sv_isa(SV *sv, const char *name)
4070 return strEQ(HvNAME(SvSTASH(sv)), name);
4074 newSVrv(SV *rv, const char *classname)
4084 SV_CHECK_THINKFIRST(rv);
4087 if (SvTYPE(rv) < SVt_RV)
4088 sv_upgrade(rv, SVt_RV);
4091 SvRV(rv) = SvREFCNT_inc(sv);
4095 HV* stash = gv_stashpv(classname, TRUE);
4096 (void)sv_bless(rv, stash);
4102 sv_setref_pv(SV *rv, const char *classname, void *pv)
4105 sv_setsv(rv, &PL_sv_undef);
4109 sv_setiv(newSVrv(rv,classname), (IV)pv);
4114 sv_setref_iv(SV *rv, const char *classname, IV iv)
4116 sv_setiv(newSVrv(rv,classname), iv);
4121 sv_setref_nv(SV *rv, const char *classname, double nv)
4123 sv_setnv(newSVrv(rv,classname), nv);
4128 sv_setref_pvn(SV *rv, const char *classname, char *pv, STRLEN n)
4130 sv_setpvn(newSVrv(rv,classname), pv, n);
4135 sv_bless(SV *sv, HV *stash)
4140 croak("Can't bless non-reference value");
4142 if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) {
4143 if (SvREADONLY(tmpRef))
4144 croak(PL_no_modify);
4145 if (SvOBJECT(tmpRef)) {
4146 if (SvTYPE(tmpRef) != SVt_PVIO)
4148 SvREFCNT_dec(SvSTASH(tmpRef));
4151 SvOBJECT_on(tmpRef);
4152 if (SvTYPE(tmpRef) != SVt_PVIO)
4154 (void)SvUPGRADE(tmpRef, SVt_PVMG);
4155 SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash);
4168 assert(SvTYPE(sv) == SVt_PVGV);
4173 SvREFCNT_dec(GvSTASH(sv));
4174 GvSTASH(sv) = Nullhv;
4176 sv_unmagic(sv, '*');
4177 Safefree(GvNAME(sv));
4179 SvFLAGS(sv) &= ~SVTYPEMASK;
4180 SvFLAGS(sv) |= SVt_PVMG;
4190 if (SvREFCNT(rv) != 1 || SvREADONLY(rv))
4193 sv_2mortal(rv); /* Schedule for freeing later */
4199 sv_magic((sv), Nullsv, 't', Nullch, 0);
4205 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
4206 MAGIC *mg = mg_find(sv, 't');
4215 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
4216 MAGIC *mg = mg_find(sv, 't');
4217 if (mg && ((mg->mg_len & 1) || (mg->mg_len & 2) && mg->mg_obj == sv))
4224 sv_setpviv(SV *sv, IV iv)
4227 char buf[TYPE_DIGITS(UV)];
4228 char *ptr = buf + sizeof(buf);
4233 sv_setpvn(sv, "", 0);
4242 *--ptr = '0' + (uv % 10);
4244 len = (buf + sizeof(buf)) - ptr;
4245 /* taking advantage of SvCUR(sv) == 0 */
4246 SvGROW(sv, sign + len + 1);
4250 memcpy(p, ptr, len);
4253 SvCUR(sv) = p - SvPVX(sv);
4258 sv_setpviv_mg(SV *sv, IV iv)
4265 sv_setpvf(SV *sv, const char* pat, ...)
4268 va_start(args, pat);
4269 sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
4275 sv_setpvf_mg(SV *sv, const char* pat, ...)
4278 va_start(args, pat);
4279 sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
4285 sv_catpvf(SV *sv, const char* pat, ...)
4288 va_start(args, pat);
4289 sv_vcatpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
4294 sv_catpvf_mg(SV *sv, const char* pat, ...)
4297 va_start(args, pat);
4298 sv_vcatpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*));
4304 sv_vsetpvfn(SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *used_locale)
4306 sv_setpvn(sv, "", 0);
4307 sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, used_locale);
4311 sv_vcatpvfn(SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *used_locale)
4319 static char nullstr[] = "(null)";
4321 /* no matter what, this is a string now */
4322 (void)SvPV_force(sv, origlen);
4324 /* special-case "", "%s", and "%_" */
4327 if (patlen == 2 && pat[0] == '%') {
4331 char *s = va_arg(*args, char*);
4332 sv_catpv(sv, s ? s : nullstr);
4334 else if (svix < svmax)
4335 sv_catsv(sv, *svargs);
4339 sv_catsv(sv, va_arg(*args, SV*));
4342 /* See comment on '_' below */
4347 patend = (char*)pat + patlen;
4348 for (p = (char*)pat; p < patend; p = q) {
4356 bool has_precis = FALSE;
4361 STRLEN esignlen = 0;
4363 char *eptr = Nullch;
4365 char ebuf[TYPE_DIGITS(int) * 2 + 16]; /* large enough for "%#.#f" */
4376 for (q = p; q < patend && *q != '%'; ++q) ;
4378 sv_catpvn(sv, p, q - p);
4416 case '1': case '2': case '3':
4417 case '4': case '5': case '6':
4418 case '7': case '8': case '9':
4421 width = width * 10 + (*q++ - '0');
4426 i = va_arg(*args, int);
4428 i = (svix < svmax) ? SvIVx(svargs[svix++]) : 0;
4430 width = (i < 0) ? -i : i;
4441 i = va_arg(*args, int);
4443 i = (svix < svmax) ? SvIVx(svargs[svix++]) : 0;
4444 precis = (i < 0) ? 0 : i;
4450 precis = precis * 10 + (*q++ - '0');
4459 #if 0 /* when quads have better support within Perl */
4460 if (*(q + 1) == 'l') {
4487 uv = va_arg(*args, int);
4489 uv = (svix < svmax) ? SvIVx(svargs[svix++]) : 0;
4491 eptr = (char*)utf8buf;
4492 elen = uv_to_utf8((U8*)eptr, uv) - utf8buf;
4496 c = va_arg(*args, int);
4498 c = (svix < svmax) ? SvIVx(svargs[svix++]) : 0;
4505 eptr = va_arg(*args, char*);
4507 elen = strlen(eptr);
4510 elen = sizeof nullstr - 1;
4513 else if (svix < svmax) {
4514 eptr = SvPVx(svargs[svix++], elen);
4516 if (has_precis && precis < elen) {
4518 sv_pos_u2b(svargs[svix - 1], &p, 0); /* sticks at end */
4521 if (width) { /* fudge width (can't fudge elen) */
4522 width += elen - sv_len_utf8(svargs[svix - 1]);
4530 * The "%_" hack might have to be changed someday,
4531 * if ISO or ANSI decide to use '_' for something.
4532 * So we keep it hidden from users' code.
4536 eptr = SvPVx(va_arg(*args, SV*), elen);
4539 if (has_precis && elen > precis)
4547 uv = (UV)va_arg(*args, void*);
4549 uv = (svix < svmax) ? (UV)svargs[svix++] : 0;
4560 case 'h': iv = (short)va_arg(*args, int); break;
4561 default: iv = va_arg(*args, int); break;
4562 case 'l': iv = va_arg(*args, long); break;
4563 case 'V': iv = va_arg(*args, IV); break;
4567 iv = (svix < svmax) ? SvIVx(svargs[svix++]) : 0;
4569 case 'h': iv = (short)iv; break;
4570 default: iv = (int)iv; break;
4571 case 'l': iv = (long)iv; break;
4578 esignbuf[esignlen++] = plus;
4582 esignbuf[esignlen++] = '-';
4612 case 'h': uv = (unsigned short)va_arg(*args, unsigned); break;
4613 default: uv = va_arg(*args, unsigned); break;
4614 case 'l': uv = va_arg(*args, unsigned long); break;
4615 case 'V': uv = va_arg(*args, UV); break;
4619 uv = (svix < svmax) ? SvUVx(svargs[svix++]) : 0;
4621 case 'h': uv = (unsigned short)uv; break;
4622 default: uv = (unsigned)uv; break;
4623 case 'l': uv = (unsigned long)uv; break;
4629 eptr = ebuf + sizeof ebuf;
4635 p = (c == 'X') ? "0123456789ABCDEF" : "0123456789abcdef";
4641 esignbuf[esignlen++] = '0';
4642 esignbuf[esignlen++] = c; /* 'x' or 'X' */
4648 *--eptr = '0' + dig;
4650 if (alt && *eptr != '0')
4656 *--eptr = '0' + dig;
4658 if (alt && *eptr != '0')
4661 default: /* it had better be ten or less */
4664 *--eptr = '0' + dig;
4665 } while (uv /= base);
4668 elen = (ebuf + sizeof ebuf) - eptr;
4671 zeros = precis - elen;
4672 else if (precis == 0 && elen == 1 && *eptr == '0')
4677 /* FLOATING POINT */
4680 c = 'f'; /* maybe %F isn't supported here */
4686 /* This is evil, but floating point is even more evil */
4689 nv = va_arg(*args, double);
4691 nv = (svix < svmax) ? SvNVx(svargs[svix++]) : 0.0;
4694 if (c != 'e' && c != 'E') {
4696 (void)frexp(nv, &i);
4697 if (i == PERL_INT_MIN)
4698 die("panic: frexp");
4700 need = BIT_DIGITS(i);
4702 need += has_precis ? precis : 6; /* known default */
4706 need += 20; /* fudge factor */
4707 if (PL_efloatsize < need) {
4708 Safefree(PL_efloatbuf);
4709 PL_efloatsize = need + 20; /* more fudge */
4710 New(906, PL_efloatbuf, PL_efloatsize, char);
4713 eptr = ebuf + sizeof ebuf;
4718 do { *--eptr = '0' + (base % 10); } while (base /= 10);
4723 do { *--eptr = '0' + (base % 10); } while (base /= 10);
4735 (void)sprintf(PL_efloatbuf, eptr, nv);
4737 eptr = PL_efloatbuf;
4738 elen = strlen(PL_efloatbuf);
4742 * User-defined locales may include arbitrary characters.
4743 * And, unfortunately, some system may alloc the "C" locale
4744 * to be overridden by a malicious user.
4747 *used_locale = TRUE;
4748 #endif /* LC_NUMERIC */
4755 i = SvCUR(sv) - origlen;
4758 case 'h': *(va_arg(*args, short*)) = i; break;
4759 default: *(va_arg(*args, int*)) = i; break;
4760 case 'l': *(va_arg(*args, long*)) = i; break;
4761 case 'V': *(va_arg(*args, IV*)) = i; break;
4764 else if (svix < svmax)
4765 sv_setuv(svargs[svix++], (UV)i);
4766 continue; /* not "break" */
4772 if (!args && ckWARN(WARN_PRINTF) &&
4773 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) {
4774 SV *msg = sv_newmortal();
4775 sv_setpvf(msg, "Invalid conversion in %s: ",
4776 (PL_op->op_type == OP_PRTF) ? "printf" : "sprintf");
4778 sv_catpvf(msg, isPRINT(c) ? "\"%%%c\"" : "\"%%\\%03o\"",
4781 sv_catpv(msg, "end of string");
4782 warner(WARN_PRINTF, "%_", msg); /* yes, this is reentrant */
4785 /* output mangled stuff ... */
4791 /* ... right here, because formatting flags should not apply */
4792 SvGROW(sv, SvCUR(sv) + elen + 1);
4794 memcpy(p, eptr, elen);
4797 SvCUR(sv) = p - SvPVX(sv);
4798 continue; /* not "break" */
4801 have = esignlen + zeros + elen;
4802 need = (have > width ? have : width);
4805 SvGROW(sv, SvCUR(sv) + need + 1);
4807 if (esignlen && fill == '0') {
4808 for (i = 0; i < esignlen; i++)
4812 memset(p, fill, gap);
4815 if (esignlen && fill != '0') {
4816 for (i = 0; i < esignlen; i++)
4820 for (i = zeros; i; i--)
4824 memcpy(p, eptr, elen);
4828 memset(p, ' ', gap);
4832 SvCUR(sv) = p - SvPVX(sv);