/* sv.c * * Copyright (c) 1991-1999, Larry Wall * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * "I wonder what the Entish is for 'yes' and 'no'," he thought. */ #include "EXTERN.h" #define PERL_IN_SV_C #include "perl.h" #ifdef OVR_DBL_DIG /* Use an overridden DBL_DIG */ # ifdef DBL_DIG # undef DBL_DIG # endif # define DBL_DIG OVR_DBL_DIG #else /* The following is all to get DBL_DIG, in order to pick a nice default value for printing floating point numbers in Gconvert. (see config.h) */ #ifdef I_LIMITS #include #endif #ifdef I_FLOAT #include #endif #ifndef HAS_DBL_DIG #define DBL_DIG 15 /* A guess that works lots of places */ #endif #endif #ifdef PERL_OBJECT #define FCALL this->*f #define VTBL this->*vtbl #else /* !PERL_OBJECT */ #define VTBL *vtbl #define FCALL *f #endif /* PERL_OBJECT */ #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv) #ifdef PURIFY #define new_SV(p) \ STMT_START { \ LOCK_SV_MUTEX; \ (p) = (SV*)safemalloc(sizeof(SV)); \ reg_add(p); \ UNLOCK_SV_MUTEX; \ SvANY(p) = 0; \ SvREFCNT(p) = 1; \ SvFLAGS(p) = 0; \ } STMT_END #define del_SV(p) \ STMT_START { \ LOCK_SV_MUTEX; \ reg_remove(p); \ Safefree((char*)(p)); \ UNLOCK_SV_MUTEX; \ } STMT_END static SV **registry; static I32 registry_size; #define REGHASH(sv,size) ((((U32)(sv)) >> 2) % (size)) #define REG_REPLACE(sv,a,b) \ STMT_START { \ void* p = sv->sv_any; \ I32 h = REGHASH(sv, registry_size); \ I32 i = h; \ while (registry[i] != (a)) { \ if (++i >= registry_size) \ i = 0; \ if (i == h) \ Perl_die(aTHX_ "SV registry bug"); \ } \ registry[i] = (b); \ } STMT_END #define REG_ADD(sv) REG_REPLACE(sv,Nullsv,sv) #define REG_REMOVE(sv) REG_REPLACE(sv,sv,Nullsv) STATIC void S_reg_add(pTHX_ SV *sv) { if (PL_sv_count >= (registry_size >> 1)) { SV **oldreg = registry; I32 oldsize = registry_size; registry_size = registry_size ? ((registry_size << 2) + 1) : 2037; Newz(707, registry, registry_size, SV*); if (oldreg) { I32 i; for (i = 0; i < oldsize; ++i) { SV* oldsv = oldreg[i]; if (oldsv) REG_ADD(oldsv); } Safefree(oldreg); } } REG_ADD(sv); ++PL_sv_count; } STATIC void S_reg_remove(pTHX_ SV *sv) { REG_REMOVE(sv); --PL_sv_count; } STATIC void S_visit(pTHX_ SVFUNC_t f) { I32 i; for (i = 0; i < registry_size; ++i) { SV* sv = registry[i]; if (sv && SvTYPE(sv) != SVTYPEMASK) (*f)(sv); } } void Perl_sv_add_arena(pTHX_ char *ptr, U32 size, U32 flags) { if (!(flags & SVf_FAKE)) Safefree(ptr); } #else /* ! PURIFY */ /* * "A time to plant, and a time to uproot what was planted..." */ #define plant_SV(p) \ STMT_START { \ SvANY(p) = (void *)PL_sv_root; \ SvFLAGS(p) = SVTYPEMASK; \ PL_sv_root = (p); \ --PL_sv_count; \ } STMT_END /* sv_mutex must be held while calling uproot_SV() */ #define uproot_SV(p) \ STMT_START { \ (p) = PL_sv_root; \ PL_sv_root = (SV*)SvANY(p); \ ++PL_sv_count; \ } STMT_END #define new_SV(p) \ STMT_START { \ LOCK_SV_MUTEX; \ if (PL_sv_root) \ uproot_SV(p); \ else \ (p) = more_sv(); \ UNLOCK_SV_MUTEX; \ SvANY(p) = 0; \ SvREFCNT(p) = 1; \ SvFLAGS(p) = 0; \ } STMT_END #ifdef DEBUGGING #define del_SV(p) \ STMT_START { \ LOCK_SV_MUTEX; \ if (PL_debug & 32768) \ del_sv(p); \ else \ plant_SV(p); \ UNLOCK_SV_MUTEX; \ } STMT_END STATIC void S_del_sv(pTHX_ SV *p) { if (PL_debug & 32768) { SV* sva; SV* sv; SV* svend; int ok = 0; for (sva = PL_sv_arenaroot; sva; sva = (SV *) SvANY(sva)) { sv = sva + 1; svend = &sva[SvREFCNT(sva)]; if (p >= sv && p < svend) ok = 1; } if (!ok) { Perl_warn(aTHX_ "Attempt to free non-arena SV: 0x%lx", (unsigned long)p); return; } } plant_SV(p); } #else /* ! DEBUGGING */ #define del_SV(p) plant_SV(p) #endif /* DEBUGGING */ void Perl_sv_add_arena(pTHX_ char *ptr, U32 size, U32 flags) { SV* sva = (SV*)ptr; register SV* sv; register SV* svend; Zero(sva, size, char); /* The first SV in an arena isn't an SV. */ SvANY(sva) = (void *) PL_sv_arenaroot; /* ptr to next arena */ SvREFCNT(sva) = size / sizeof(SV); /* number of SV slots */ SvFLAGS(sva) = flags; /* FAKE if not to be freed */ PL_sv_arenaroot = sva; PL_sv_root = sva + 1; svend = &sva[SvREFCNT(sva) - 1]; sv = sva + 1; while (sv < svend) { SvANY(sv) = (void *)(SV*)(sv + 1); SvFLAGS(sv) = SVTYPEMASK; sv++; } SvANY(sv) = 0; SvFLAGS(sv) = SVTYPEMASK; } /* sv_mutex must be held while calling more_sv() */ STATIC SV* S_more_sv(pTHX) { register SV* sv; if (PL_nice_chunk) { sv_add_arena(PL_nice_chunk, PL_nice_chunk_size, 0); PL_nice_chunk = Nullch; } else { char *chunk; /* must use New here to match call to */ New(704,chunk,1008,char); /* Safefree() in sv_free_arenas() */ sv_add_arena(chunk, 1008, 0); } uproot_SV(sv); return sv; } STATIC void S_visit(pTHX_ SVFUNC_t f) { SV* sva; SV* sv; register SV* svend; for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) { svend = &sva[SvREFCNT(sva)]; for (sv = sva + 1; sv < svend; ++sv) { if (SvTYPE(sv) != SVTYPEMASK) (FCALL)(aTHX_ sv); } } } #endif /* PURIFY */ STATIC void S_do_report_used(pTHX_ SV *sv) { if (SvTYPE(sv) != SVTYPEMASK) { /* XXX Perhaps this ought to go to Perl_debug_log, if DEBUGGING. */ PerlIO_printf(PerlIO_stderr(), "****\n"); sv_dump(sv); } } void Perl_sv_report_used(pTHX) { visit(FUNC_NAME_TO_PTR(S_do_report_used)); } STATIC void S_do_clean_objs(pTHX_ SV *sv) { SV* rv; if (SvROK(sv) && SvOBJECT(rv = SvRV(sv))) { DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning object ref:\n "), sv_dump(sv));) SvROK_off(sv); SvRV(sv) = 0; SvREFCNT_dec(rv); } /* XXX Might want to check arrays, etc. */ } #ifndef DISABLE_DESTRUCTOR_KLUDGE STATIC void S_do_clean_named_objs(pTHX_ SV *sv) { if (SvTYPE(sv) == SVt_PVGV) { if ( SvOBJECT(GvSV(sv)) || GvAV(sv) && SvOBJECT(GvAV(sv)) || GvHV(sv) && SvOBJECT(GvHV(sv)) || GvIO(sv) && SvOBJECT(GvIO(sv)) || GvCV(sv) && SvOBJECT(GvCV(sv)) ) { DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning named glob object:\n "), sv_dump(sv));) SvREFCNT_dec(sv); } } } #endif void Perl_sv_clean_objs(pTHX) { PL_in_clean_objs = TRUE; visit(FUNC_NAME_TO_PTR(S_do_clean_objs)); #ifndef DISABLE_DESTRUCTOR_KLUDGE /* some barnacles may yet remain, clinging to typeglobs */ visit(FUNC_NAME_TO_PTR(S_do_clean_named_objs)); #endif PL_in_clean_objs = FALSE; } STATIC void S_do_clean_all(pTHX_ SV *sv) { DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning loops: SV at 0x%lx\n", sv) );) SvFLAGS(sv) |= SVf_BREAK; SvREFCNT_dec(sv); } void Perl_sv_clean_all(pTHX) { PL_in_clean_all = TRUE; visit(FUNC_NAME_TO_PTR(S_do_clean_all)); PL_in_clean_all = FALSE; } void Perl_sv_free_arenas(pTHX) { SV* sva; SV* svanext; /* Free arenas here, but be careful about fake ones. (We assume contiguity of the fake ones with the corresponding real ones.) */ for (sva = PL_sv_arenaroot; sva; sva = svanext) { svanext = (SV*) SvANY(sva); while (svanext && SvFAKE(svanext)) svanext = (SV*) SvANY(svanext); if (!SvFAKE(sva)) Safefree((void *)sva); } if (PL_nice_chunk) Safefree(PL_nice_chunk); PL_nice_chunk = Nullch; PL_nice_chunk_size = 0; PL_sv_arenaroot = 0; PL_sv_root = 0; } STATIC XPVIV* S_new_xiv(pTHX) { IV* xiv; LOCK_SV_MUTEX; if (!PL_xiv_root) more_xiv(); xiv = PL_xiv_root; /* * See comment in more_xiv() -- RAM. */ PL_xiv_root = *(IV**)xiv; UNLOCK_SV_MUTEX; return (XPVIV*)((char*)xiv - STRUCT_OFFSET(XPVIV, xiv_iv)); } STATIC void S_del_xiv(pTHX_ XPVIV *p) { IV* xiv = (IV*)((char*)(p) + STRUCT_OFFSET(XPVIV, xiv_iv)); LOCK_SV_MUTEX; *(IV**)xiv = PL_xiv_root; PL_xiv_root = xiv; UNLOCK_SV_MUTEX; } STATIC void S_more_xiv(pTHX) { register IV* xiv; register IV* xivend; XPV* ptr; New(705, ptr, 1008/sizeof(XPV), XPV); ptr->xpv_pv = (char*)PL_xiv_arenaroot; /* linked list of xiv arenas */ PL_xiv_arenaroot = ptr; /* to keep Purify happy */ xiv = (IV*) ptr; xivend = &xiv[1008 / sizeof(IV) - 1]; xiv += (sizeof(XPV) - 1) / sizeof(IV) + 1; /* fudge by size of XPV */ PL_xiv_root = xiv; while (xiv < xivend) { *(IV**)xiv = (IV *)(xiv + 1); xiv++; } *(IV**)xiv = 0; } STATIC XPVNV* S_new_xnv(pTHX) { double* xnv; LOCK_SV_MUTEX; if (!PL_xnv_root) more_xnv(); xnv = PL_xnv_root; PL_xnv_root = *(double**)xnv; UNLOCK_SV_MUTEX; return (XPVNV*)((char*)xnv - STRUCT_OFFSET(XPVNV, xnv_nv)); } STATIC void S_del_xnv(pTHX_ XPVNV *p) { double* xnv = (double*)((char*)(p) + STRUCT_OFFSET(XPVNV, xnv_nv)); LOCK_SV_MUTEX; *(double**)xnv = PL_xnv_root; PL_xnv_root = xnv; UNLOCK_SV_MUTEX; } STATIC void S_more_xnv(pTHX) { register double* xnv; register double* xnvend; New(711, xnv, 1008/sizeof(double), double); xnvend = &xnv[1008 / sizeof(double) - 1]; xnv += (sizeof(XPVIV) - 1) / sizeof(double) + 1; /* fudge by sizeof XPVIV */ PL_xnv_root = xnv; while (xnv < xnvend) { *(double**)xnv = (double*)(xnv + 1); xnv++; } *(double**)xnv = 0; } STATIC XRV* S_new_xrv(pTHX) { XRV* xrv; LOCK_SV_MUTEX; if (!PL_xrv_root) more_xrv(); xrv = PL_xrv_root; PL_xrv_root = (XRV*)xrv->xrv_rv; UNLOCK_SV_MUTEX; return xrv; } STATIC void S_del_xrv(pTHX_ XRV *p) { LOCK_SV_MUTEX; p->xrv_rv = (SV*)PL_xrv_root; PL_xrv_root = p; UNLOCK_SV_MUTEX; } STATIC void S_more_xrv(pTHX) { register XRV* xrv; register XRV* xrvend; New(712, PL_xrv_root, 1008/sizeof(XRV), XRV); xrv = PL_xrv_root; xrvend = &xrv[1008 / sizeof(XRV) - 1]; while (xrv < xrvend) { xrv->xrv_rv = (SV*)(xrv + 1); xrv++; } xrv->xrv_rv = 0; } STATIC XPV* S_new_xpv(pTHX) { XPV* xpv; LOCK_SV_MUTEX; if (!PL_xpv_root) more_xpv(); xpv = PL_xpv_root; PL_xpv_root = (XPV*)xpv->xpv_pv; UNLOCK_SV_MUTEX; return xpv; } STATIC void S_del_xpv(pTHX_ XPV *p) { LOCK_SV_MUTEX; p->xpv_pv = (char*)PL_xpv_root; PL_xpv_root = p; UNLOCK_SV_MUTEX; } STATIC void S_more_xpv(pTHX) { register XPV* xpv; register XPV* xpvend; New(713, PL_xpv_root, 1008/sizeof(XPV), XPV); xpv = PL_xpv_root; xpvend = &xpv[1008 / sizeof(XPV) - 1]; while (xpv < xpvend) { xpv->xpv_pv = (char*)(xpv + 1); xpv++; } xpv->xpv_pv = 0; } #ifdef PURIFY #define new_XIV() (void*)safemalloc(sizeof(XPVIV)) #define del_XIV(p) Safefree((char*)p) #else #define new_XIV() (void*)new_xiv() #define del_XIV(p) del_xiv((XPVIV*) p) #endif #ifdef PURIFY #define new_XNV() (void*)safemalloc(sizeof(XPVNV)) #define del_XNV(p) Safefree((char*)p) #else #define new_XNV() (void*)new_xnv() #define del_XNV(p) del_xnv((XPVNV*) p) #endif #ifdef PURIFY #define new_XRV() (void*)safemalloc(sizeof(XRV)) #define del_XRV(p) Safefree((char*)p) #else #define new_XRV() (void*)new_xrv() #define del_XRV(p) del_xrv((XRV*) p) #endif #ifdef PURIFY #define new_XPV() (void*)safemalloc(sizeof(XPV)) #define del_XPV(p) Safefree((char*)p) #else #define new_XPV() (void*)new_xpv() #define del_XPV(p) del_xpv((XPV *)p) #endif #ifdef PURIFY # define my_safemalloc(s) safemalloc(s) # define my_safefree(s) safefree(s) #else STATIC void* S_my_safemalloc(pTHX_ MEM_SIZE size) { char *p; New(717, p, size, char); return (void*)p; } # define my_safefree(s) Safefree(s) #endif #define new_XPVIV() (void*)my_safemalloc(sizeof(XPVIV)) #define del_XPVIV(p) my_safefree((char*)p) #define new_XPVNV() (void*)my_safemalloc(sizeof(XPVNV)) #define del_XPVNV(p) my_safefree((char*)p) #define new_XPVMG() (void*)my_safemalloc(sizeof(XPVMG)) #define del_XPVMG(p) my_safefree((char*)p) #define new_XPVLV() (void*)my_safemalloc(sizeof(XPVLV)) #define del_XPVLV(p) my_safefree((char*)p) #define new_XPVAV() (void*)my_safemalloc(sizeof(XPVAV)) #define del_XPVAV(p) my_safefree((char*)p) #define new_XPVHV() (void*)my_safemalloc(sizeof(XPVHV)) #define del_XPVHV(p) my_safefree((char*)p) #define new_XPVCV() (void*)my_safemalloc(sizeof(XPVCV)) #define del_XPVCV(p) my_safefree((char*)p) #define new_XPVGV() (void*)my_safemalloc(sizeof(XPVGV)) #define del_XPVGV(p) my_safefree((char*)p) #define new_XPVBM() (void*)my_safemalloc(sizeof(XPVBM)) #define del_XPVBM(p) my_safefree((char*)p) #define new_XPVFM() (void*)my_safemalloc(sizeof(XPVFM)) #define del_XPVFM(p) my_safefree((char*)p) #define new_XPVIO() (void*)my_safemalloc(sizeof(XPVIO)) #define del_XPVIO(p) my_safefree((char*)p) bool Perl_sv_upgrade(pTHX_ register SV *sv, U32 mt) { char* pv; U32 cur; U32 len; IV iv; double nv; MAGIC* magic; HV* stash; if (SvTYPE(sv) == mt) return TRUE; if (mt < SVt_PVIV) (void)SvOOK_off(sv); switch (SvTYPE(sv)) { case SVt_NULL: pv = 0; cur = 0; len = 0; iv = 0; nv = 0.0; magic = 0; stash = 0; break; case SVt_IV: pv = 0; cur = 0; len = 0; iv = SvIVX(sv); nv = (double)SvIVX(sv); del_XIV(SvANY(sv)); magic = 0; stash = 0; if (mt == SVt_NV) mt = SVt_PVNV; else if (mt < SVt_PVIV) mt = SVt_PVIV; break; case SVt_NV: pv = 0; cur = 0; len = 0; nv = SvNVX(sv); iv = I_V(nv); magic = 0; stash = 0; del_XNV(SvANY(sv)); SvANY(sv) = 0; if (mt < SVt_PVNV) mt = SVt_PVNV; break; case SVt_RV: pv = (char*)SvRV(sv); cur = 0; len = 0; iv = (IV)pv; nv = (double)(unsigned long)pv; del_XRV(SvANY(sv)); magic = 0; stash = 0; break; case SVt_PV: pv = SvPVX(sv); cur = SvCUR(sv); len = SvLEN(sv); iv = 0; nv = 0.0; magic = 0; stash = 0; del_XPV(SvANY(sv)); if (mt <= SVt_IV) mt = SVt_PVIV; else if (mt == SVt_NV) mt = SVt_PVNV; break; case SVt_PVIV: pv = SvPVX(sv); cur = SvCUR(sv); len = SvLEN(sv); iv = SvIVX(sv); nv = 0.0; magic = 0; stash = 0; del_XPVIV(SvANY(sv)); break; case SVt_PVNV: pv = SvPVX(sv); cur = SvCUR(sv); len = SvLEN(sv); iv = SvIVX(sv); nv = SvNVX(sv); magic = 0; stash = 0; del_XPVNV(SvANY(sv)); break; case SVt_PVMG: pv = SvPVX(sv); cur = SvCUR(sv); len = SvLEN(sv); iv = SvIVX(sv); nv = SvNVX(sv); magic = SvMAGIC(sv); stash = SvSTASH(sv); del_XPVMG(SvANY(sv)); break; default: Perl_croak(aTHX_ "Can't upgrade that kind of scalar"); } switch (mt) { case SVt_NULL: Perl_croak(aTHX_ "Can't upgrade to undef"); case SVt_IV: SvANY(sv) = new_XIV(); SvIVX(sv) = iv; break; case SVt_NV: SvANY(sv) = new_XNV(); SvNVX(sv) = nv; break; case SVt_RV: SvANY(sv) = new_XRV(); SvRV(sv) = (SV*)pv; break; case SVt_PV: SvANY(sv) = new_XPV(); SvPVX(sv) = pv; SvCUR(sv) = cur; SvLEN(sv) = len; break; case SVt_PVIV: SvANY(sv) = new_XPVIV(); SvPVX(sv) = pv; SvCUR(sv) = cur; SvLEN(sv) = len; SvIVX(sv) = iv; if (SvNIOK(sv)) (void)SvIOK_on(sv); SvNOK_off(sv); break; case SVt_PVNV: SvANY(sv) = new_XPVNV(); SvPVX(sv) = pv; SvCUR(sv) = cur; SvLEN(sv) = len; SvIVX(sv) = iv; SvNVX(sv) = nv; break; case SVt_PVMG: SvANY(sv) = new_XPVMG(); SvPVX(sv) = pv; SvCUR(sv) = cur; SvLEN(sv) = len; SvIVX(sv) = iv; SvNVX(sv) = nv; SvMAGIC(sv) = magic; SvSTASH(sv) = stash; break; case SVt_PVLV: SvANY(sv) = new_XPVLV(); SvPVX(sv) = pv; SvCUR(sv) = cur; SvLEN(sv) = len; SvIVX(sv) = iv; SvNVX(sv) = nv; SvMAGIC(sv) = magic; SvSTASH(sv) = stash; LvTARGOFF(sv) = 0; LvTARGLEN(sv) = 0; LvTARG(sv) = 0; LvTYPE(sv) = 0; break; case SVt_PVAV: SvANY(sv) = new_XPVAV(); if (pv) Safefree(pv); SvPVX(sv) = 0; AvMAX(sv) = -1; AvFILLp(sv) = -1; SvIVX(sv) = 0; SvNVX(sv) = 0.0; SvMAGIC(sv) = magic; SvSTASH(sv) = stash; AvALLOC(sv) = 0; AvARYLEN(sv) = 0; AvFLAGS(sv) = 0; break; case SVt_PVHV: SvANY(sv) = new_XPVHV(); if (pv) Safefree(pv); SvPVX(sv) = 0; HvFILL(sv) = 0; HvMAX(sv) = 0; HvKEYS(sv) = 0; SvNVX(sv) = 0.0; SvMAGIC(sv) = magic; SvSTASH(sv) = stash; HvRITER(sv) = 0; HvEITER(sv) = 0; HvPMROOT(sv) = 0; HvNAME(sv) = 0; break; case SVt_PVCV: SvANY(sv) = new_XPVCV(); Zero(SvANY(sv), 1, XPVCV); SvPVX(sv) = pv; SvCUR(sv) = cur; SvLEN(sv) = len; SvIVX(sv) = iv; SvNVX(sv) = nv; SvMAGIC(sv) = magic; SvSTASH(sv) = stash; break; case SVt_PVGV: SvANY(sv) = new_XPVGV(); SvPVX(sv) = pv; SvCUR(sv) = cur; SvLEN(sv) = len; SvIVX(sv) = iv; SvNVX(sv) = nv; SvMAGIC(sv) = magic; SvSTASH(sv) = stash; GvGP(sv) = 0; GvNAME(sv) = 0; GvNAMELEN(sv) = 0; GvSTASH(sv) = 0; GvFLAGS(sv) = 0; break; case SVt_PVBM: SvANY(sv) = new_XPVBM(); SvPVX(sv) = pv; SvCUR(sv) = cur; SvLEN(sv) = len; SvIVX(sv) = iv; SvNVX(sv) = nv; SvMAGIC(sv) = magic; SvSTASH(sv) = stash; BmRARE(sv) = 0; BmUSEFUL(sv) = 0; BmPREVIOUS(sv) = 0; break; case SVt_PVFM: SvANY(sv) = new_XPVFM(); Zero(SvANY(sv), 1, XPVFM); SvPVX(sv) = pv; SvCUR(sv) = cur; SvLEN(sv) = len; SvIVX(sv) = iv; SvNVX(sv) = nv; SvMAGIC(sv) = magic; SvSTASH(sv) = stash; break; case SVt_PVIO: SvANY(sv) = new_XPVIO(); Zero(SvANY(sv), 1, XPVIO); SvPVX(sv) = pv; SvCUR(sv) = cur; SvLEN(sv) = len; SvIVX(sv) = iv; SvNVX(sv) = nv; SvMAGIC(sv) = magic; SvSTASH(sv) = stash; IoPAGE_LEN(sv) = 60; break; } SvFLAGS(sv) &= ~SVTYPEMASK; SvFLAGS(sv) |= mt; return TRUE; } int Perl_sv_backoff(pTHX_ register SV *sv) { assert(SvOOK(sv)); if (SvIVX(sv)) { char *s = SvPVX(sv); SvLEN(sv) += SvIVX(sv); SvPVX(sv) -= SvIVX(sv); SvIV_set(sv, 0); Move(s, SvPVX(sv), SvCUR(sv)+1, char); } SvFLAGS(sv) &= ~SVf_OOK; return 0; } char * Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen) { register char *s; #ifdef HAS_64K_LIMIT if (newlen >= 0x10000) { PerlIO_printf(Perl_debug_log, "Allocation too large: %lx\n", newlen); my_exit(1); } #endif /* HAS_64K_LIMIT */ if (SvROK(sv)) sv_unref(sv); if (SvTYPE(sv) < SVt_PV) { sv_upgrade(sv, SVt_PV); s = SvPVX(sv); } else if (SvOOK(sv)) { /* pv is offset? */ sv_backoff(sv); s = SvPVX(sv); if (newlen > SvLEN(sv)) newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */ #ifdef HAS_64K_LIMIT if (newlen >= 0x10000) newlen = 0xFFFF; #endif } else s = SvPVX(sv); if (newlen > SvLEN(sv)) { /* need more room? */ if (SvLEN(sv) && s) { #if defined(MYMALLOC) && !defined(PURIFY) && !defined(LEAKTEST) STRLEN l = malloced_size((void*)SvPVX(sv)); if (newlen <= l) { SvLEN_set(sv, l); return s; } else #endif Renew(s,newlen,char); } else New(703,s,newlen,char); SvPV_set(sv, s); SvLEN_set(sv, newlen); } return s; } void Perl_sv_setiv(pTHX_ register SV *sv, IV i) { SV_CHECK_THINKFIRST(sv); switch (SvTYPE(sv)) { case SVt_NULL: sv_upgrade(sv, SVt_IV); break; case SVt_NV: sv_upgrade(sv, SVt_PVNV); break; case SVt_RV: case SVt_PV: sv_upgrade(sv, SVt_PVIV); break; case SVt_PVGV: case SVt_PVAV: case SVt_PVHV: case SVt_PVCV: case SVt_PVFM: case SVt_PVIO: { dTHR; Perl_croak(aTHX_ "Can't coerce %s to integer in %s", sv_reftype(sv,0), PL_op_desc[PL_op->op_type]); } } (void)SvIOK_only(sv); /* validate number */ SvIVX(sv) = i; SvTAINT(sv); } void Perl_sv_setiv_mg(pTHX_ register SV *sv, IV i) { sv_setiv(sv,i); SvSETMAGIC(sv); } void Perl_sv_setuv(pTHX_ register SV *sv, UV u) { sv_setiv(sv, 0); SvIsUV_on(sv); SvUVX(sv) = u; } void Perl_sv_setuv_mg(pTHX_ register SV *sv, UV u) { sv_setuv(sv,u); SvSETMAGIC(sv); } void Perl_sv_setnv(pTHX_ register SV *sv, double num) { SV_CHECK_THINKFIRST(sv); switch (SvTYPE(sv)) { case SVt_NULL: case SVt_IV: sv_upgrade(sv, SVt_NV); break; case SVt_RV: case SVt_PV: case SVt_PVIV: sv_upgrade(sv, SVt_PVNV); break; case SVt_PVGV: case SVt_PVAV: case SVt_PVHV: case SVt_PVCV: case SVt_PVFM: case SVt_PVIO: { dTHR; Perl_croak(aTHX_ "Can't coerce %s to number in %s", sv_reftype(sv,0), PL_op_name[PL_op->op_type]); } } SvNVX(sv) = num; (void)SvNOK_only(sv); /* validate number */ SvTAINT(sv); } void Perl_sv_setnv_mg(pTHX_ register SV *sv, double num) { sv_setnv(sv,num); SvSETMAGIC(sv); } STATIC void S_not_a_number(pTHX_ SV *sv) { dTHR; char tmpbuf[64]; char *d = tmpbuf; char *s; char *limit = tmpbuf + sizeof(tmpbuf) - 8; /* each *s can expand to 4 chars + "...\0", i.e. need room for 8 chars */ for (s = SvPVX(sv); *s && d < limit; s++) { int ch = *s & 0xFF; if (ch & 128 && !isPRINT_LC(ch)) { *d++ = 'M'; *d++ = '-'; ch &= 127; } if (ch == '\n') { *d++ = '\\'; *d++ = 'n'; } else if (ch == '\r') { *d++ = '\\'; *d++ = 'r'; } else if (ch == '\f') { *d++ = '\\'; *d++ = 'f'; } else if (ch == '\\') { *d++ = '\\'; *d++ = '\\'; } else if (isPRINT_LC(ch)) *d++ = ch; else { *d++ = '^'; *d++ = toCTRL(ch); } } if (*s) { *d++ = '.'; *d++ = '.'; *d++ = '.'; } *d = '\0'; if (PL_op) Perl_warner(aTHX_ WARN_NUMERIC, "Argument \"%s\" isn't numeric in %s", tmpbuf, PL_op_name[PL_op->op_type]); else Perl_warner(aTHX_ WARN_NUMERIC, "Argument \"%s\" isn't numeric", tmpbuf); } /* the number can be converted to _integer_ with atol() */ #define IS_NUMBER_TO_INT_BY_ATOL 0x01 #define IS_NUMBER_TO_INT_BY_ATOF 0x02 /* atol() may be != atof() */ #define IS_NUMBER_NOT_IV 0x04 /* (IV)atof() may be != atof() */ #define IS_NUMBER_NEG 0x08 /* not good to cache UV */ /* Actually, ISO C leaves conversion of UV to IV undefined, but until proven guilty, assume that things are not that bad... */ IV Perl_sv_2iv(pTHX_ register SV *sv) { if (!sv) return 0; if (SvGMAGICAL(sv)) { mg_get(sv); if (SvIOKp(sv)) return SvIVX(sv); if (SvNOKp(sv)) { return I_V(SvNVX(sv)); } if (SvPOKp(sv) && SvLEN(sv)) return asIV(sv); if (!SvROK(sv)) { if (!(SvFLAGS(sv) & SVs_PADTMP)) { dTHR; if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); } return 0; } } if (SvTHINKFIRST(sv)) { if (SvROK(sv)) { SV* tmpstr; if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv, numer))) return SvIV(tmpstr); return (IV)SvRV(sv); } if (SvREADONLY(sv)) { if (SvNOKp(sv)) { return I_V(SvNVX(sv)); } if (SvPOKp(sv) && SvLEN(sv)) return asIV(sv); { dTHR; if (ckWARN(WARN_UNINITIALIZED)) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); } return 0; } } if (SvIOKp(sv)) { if (SvIsUV(sv)) { return (IV)(SvUVX(sv)); } else { return SvIVX(sv); } } if (SvNOKp(sv)) { /* We can cache the IV/UV value even if it not good enough * to reconstruct NV, since the conversion to PV will prefer * NV over IV/UV. XXXX 64-bit? */ if (SvTYPE(sv) == SVt_NV) sv_upgrade(sv, SVt_PVNV); (void)SvIOK_on(sv); if (SvNVX(sv) < (double)IV_MAX + 0.5) SvIVX(sv) = I_V(SvNVX(sv)); else { SvUVX(sv) = U_V(SvNVX(sv)); SvIsUV_on(sv); ret_iv_max: DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2iv(%lu => %ld) (as unsigned)\n", (unsigned long)sv, (unsigned long)SvUVX(sv), (long)(IV)SvUVX(sv))); return (IV)SvUVX(sv); } } else if (SvPOKp(sv) && SvLEN(sv)) { I32 numtype = looks_like_number(sv); /* We want to avoid a possible problem when we cache an IV which may be later translated to an NV, and the resulting NV is not the translation of the initial data. This means that if we cache such an IV, we need to cache the NV as well. Moreover, we trade speed for space, and do not cache the NV if not needed. */ if (numtype & IS_NUMBER_NOT_IV) { /* May be not an integer. Need to cache NV if we cache IV * - otherwise future conversion to NV will be wrong. */ double d; SET_NUMERIC_STANDARD(); d = atof(SvPVX(sv)); if (SvTYPE(sv) < SVt_PVNV) sv_upgrade(sv, SVt_PVNV); SvNVX(sv) = d; (void)SvNOK_on(sv); (void)SvIOK_on(sv); DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2nv(%g)\n",(unsigned long)sv, SvNVX(sv))); if (SvNVX(sv) < (double)IV_MAX + 0.5) SvIVX(sv) = I_V(SvNVX(sv)); else { SvUVX(sv) = U_V(SvNVX(sv)); SvIsUV_on(sv); goto ret_iv_max; } } else if (numtype) { /* The NV may be reconstructed from IV - safe to cache IV, which may be calculated by atol(). */ if (SvTYPE(sv) == SVt_PV) sv_upgrade(sv, SVt_PVIV); (void)SvIOK_on(sv); SvIVX(sv) = atol(SvPVX(sv)); /* XXXX 64-bit? */ } else { /* Not a number. Cache 0. */ dTHR; if (SvTYPE(sv) < SVt_PVIV) sv_upgrade(sv, SVt_PVIV); SvIVX(sv) = 0; (void)SvIOK_on(sv); if (ckWARN(WARN_NUMERIC)) not_a_number(sv); } } else { dTHR; if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP)) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); if (SvTYPE(sv) < SVt_IV) /* Typically the caller expects that sv_any is not NULL now. */ sv_upgrade(sv, SVt_IV); return 0; } DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2iv(%ld)\n", (unsigned long)sv,(long)SvIVX(sv))); return SvIsUV(sv) ? (IV)SvUVX(sv) : SvIVX(sv); } UV Perl_sv_2uv(pTHX_ register SV *sv) { if (!sv) return 0; if (SvGMAGICAL(sv)) { mg_get(sv); if (SvIOKp(sv)) return SvUVX(sv); if (SvNOKp(sv)) return U_V(SvNVX(sv)); if (SvPOKp(sv) && SvLEN(sv)) return asUV(sv); if (!SvROK(sv)) { if (!(SvFLAGS(sv) & SVs_PADTMP)) { dTHR; if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); } return 0; } } if (SvTHINKFIRST(sv)) { if (SvROK(sv)) { SV* tmpstr; if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv, numer))) return SvUV(tmpstr); return (UV)SvRV(sv); } if (SvREADONLY(sv)) { if (SvNOKp(sv)) { return U_V(SvNVX(sv)); } if (SvPOKp(sv) && SvLEN(sv)) return asUV(sv); { dTHR; if (ckWARN(WARN_UNINITIALIZED)) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); } return 0; } } if (SvIOKp(sv)) { if (SvIsUV(sv)) { return SvUVX(sv); } else { return (UV)SvIVX(sv); } } if (SvNOKp(sv)) { /* We can cache the IV/UV value even if it not good enough * to reconstruct NV, since the conversion to PV will prefer * NV over IV/UV. XXXX 64-bit? */ if (SvTYPE(sv) == SVt_NV) sv_upgrade(sv, SVt_PVNV); (void)SvIOK_on(sv); if (SvNVX(sv) >= -0.5) { SvIsUV_on(sv); SvUVX(sv) = U_V(SvNVX(sv)); } else { SvIVX(sv) = I_V(SvNVX(sv)); ret_zero: DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2uv(%ld => %lu) (as signed)\n", (unsigned long)sv,(long)SvIVX(sv), (long)(UV)SvIVX(sv))); return (UV)SvIVX(sv); } } else if (SvPOKp(sv) && SvLEN(sv)) { I32 numtype = looks_like_number(sv); /* We want to avoid a possible problem when we cache a UV which may be later translated to an NV, and the resulting NV is not the translation of the initial data. This means that if we cache such a UV, we need to cache the NV as well. Moreover, we trade speed for space, and do not cache the NV if not needed. */ if (numtype & IS_NUMBER_NOT_IV) { /* May be not an integer. Need to cache NV if we cache IV * - otherwise future conversion to NV will be wrong. */ double d; SET_NUMERIC_STANDARD(); d = atof(SvPVX(sv)); /* XXXX 64-bit? */ if (SvTYPE(sv) < SVt_PVNV) sv_upgrade(sv, SVt_PVNV); SvNVX(sv) = d; (void)SvNOK_on(sv); (void)SvIOK_on(sv); DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2nv(%g)\n",(unsigned long)sv, SvNVX(sv))); if (SvNVX(sv) < -0.5) { SvIVX(sv) = I_V(SvNVX(sv)); goto ret_zero; } else { SvUVX(sv) = U_V(SvNVX(sv)); SvIsUV_on(sv); } } else if (numtype & IS_NUMBER_NEG) { /* The NV may be reconstructed from IV - safe to cache IV, which may be calculated by atol(). */ if (SvTYPE(sv) == SVt_PV) sv_upgrade(sv, SVt_PVIV); (void)SvIOK_on(sv); SvIVX(sv) = (IV)atol(SvPVX(sv)); /* XXXX 64-bit? */ } else if (numtype) { /* Non-negative */ /* The NV may be reconstructed from UV - safe to cache UV, which may be calculated by strtoul()/atol. */ if (SvTYPE(sv) == SVt_PV) sv_upgrade(sv, SVt_PVIV); (void)SvIOK_on(sv); (void)SvIsUV_on(sv); #ifdef HAS_STRTOUL SvUVX(sv) = strtoul(SvPVX(sv), Null(char**), 10); /* XXXX 64-bit? */ #else /* no atou(), but we know the number fits into IV... */ /* The only problem may be if it is negative... */ SvUVX(sv) = (UV)atol(SvPVX(sv)); /* XXXX 64-bit? */ #endif } else { /* Not a number. Cache 0. */ dTHR; if (SvTYPE(sv) < SVt_PVIV) sv_upgrade(sv, SVt_PVIV); SvUVX(sv) = 0; /* We assume that 0s have the same bitmap in IV and UV. */ (void)SvIOK_on(sv); (void)SvIsUV_on(sv); if (ckWARN(WARN_NUMERIC)) not_a_number(sv); } } else { if (!(SvFLAGS(sv) & SVs_PADTMP)) { dTHR; if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); } if (SvTYPE(sv) < SVt_IV) /* Typically the caller expects that sv_any is not NULL now. */ sv_upgrade(sv, SVt_IV); return 0; } DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2uv(%lu)\n", (unsigned long)sv,SvUVX(sv))); return SvIsUV(sv) ? SvUVX(sv) : (UV)SvIVX(sv); } double Perl_sv_2nv(pTHX_ register SV *sv) { if (!sv) return 0.0; if (SvGMAGICAL(sv)) { mg_get(sv); if (SvNOKp(sv)) return SvNVX(sv); if (SvPOKp(sv) && SvLEN(sv)) { dTHR; if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv)) not_a_number(sv); SET_NUMERIC_STANDARD(); return atof(SvPVX(sv)); } if (SvIOKp(sv)) { if (SvIsUV(sv)) return (double)SvUVX(sv); else return (double)SvIVX(sv); } if (!SvROK(sv)) { if (!(SvFLAGS(sv) & SVs_PADTMP)) { dTHR; if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); } return 0; } } if (SvTHINKFIRST(sv)) { if (SvROK(sv)) { SV* tmpstr; if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer))) return SvNV(tmpstr); return (double)(unsigned long)SvRV(sv); } if (SvREADONLY(sv)) { dTHR; if (SvPOKp(sv) && SvLEN(sv)) { if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv)) not_a_number(sv); SET_NUMERIC_STANDARD(); return atof(SvPVX(sv)); } if (SvIOKp(sv)) { if (SvIsUV(sv)) return (double)SvUVX(sv); else return (double)SvIVX(sv); } if (ckWARN(WARN_UNINITIALIZED)) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); return 0.0; } } if (SvTYPE(sv) < SVt_NV) { if (SvTYPE(sv) == SVt_IV) sv_upgrade(sv, SVt_PVNV); else sv_upgrade(sv, SVt_NV); DEBUG_c(SET_NUMERIC_STANDARD()); DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx num(%g)\n",(unsigned long)sv,SvNVX(sv))); } else if (SvTYPE(sv) < SVt_PVNV) sv_upgrade(sv, SVt_PVNV); if (SvIOKp(sv) && (!SvPOKp(sv) || !strchr(SvPVX(sv),'.') || !looks_like_number(sv))) { SvNVX(sv) = SvIsUV(sv) ? (double)SvUVX(sv) : (double)SvIVX(sv); } else if (SvPOKp(sv) && SvLEN(sv)) { dTHR; if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !looks_like_number(sv)) not_a_number(sv); SET_NUMERIC_STANDARD(); SvNVX(sv) = atof(SvPVX(sv)); } else { dTHR; if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP)) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); if (SvTYPE(sv) < SVt_NV) /* Typically the caller expects that sv_any is not NULL now. */ sv_upgrade(sv, SVt_NV); return 0.0; } SvNOK_on(sv); DEBUG_c(SET_NUMERIC_STANDARD()); DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2nv(%g)\n",(unsigned long)sv,SvNVX(sv))); return SvNVX(sv); } STATIC IV S_asIV(pTHX_ SV *sv) { I32 numtype = looks_like_number(sv); double d; if (numtype & IS_NUMBER_TO_INT_BY_ATOL) return atol(SvPVX(sv)); /* XXXX 64-bit? */ if (!numtype) { dTHR; if (ckWARN(WARN_NUMERIC)) not_a_number(sv); } SET_NUMERIC_STANDARD(); d = atof(SvPVX(sv)); return I_V(d); } STATIC UV S_asUV(pTHX_ SV *sv) { I32 numtype = looks_like_number(sv); #ifdef HAS_STRTOUL if (numtype & IS_NUMBER_TO_INT_BY_ATOL) return strtoul(SvPVX(sv), Null(char**), 10); #endif if (!numtype) { dTHR; if (ckWARN(WARN_NUMERIC)) not_a_number(sv); } SET_NUMERIC_STANDARD(); return U_V(atof(SvPVX(sv))); } /* * Returns a combination of (advisory only - can get false negatives) * IS_NUMBER_TO_INT_BY_ATOL, IS_NUMBER_TO_INT_BY_ATOF, IS_NUMBER_NOT_IV, * IS_NUMBER_NEG * 0 if does not look like number. * * In fact possible values are 0 and * IS_NUMBER_TO_INT_BY_ATOL 123 * IS_NUMBER_TO_INT_BY_ATOL | IS_NUMBER_NOT_IV 123.1 * IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV 123e0 * with a possible addition of IS_NUMBER_NEG. */ I32 Perl_looks_like_number(pTHX_ SV *sv) { /* XXXX 64-bit? It may be not IS_NUMBER_TO_INT_BY_ATOL, but * using atof() may lose precision. */ register char *s; register char *send; register char *sbegin; register char *nbegin; I32 numtype = 0; STRLEN len; if (SvPOK(sv)) { sbegin = SvPVX(sv); len = SvCUR(sv); } else if (SvPOKp(sv)) sbegin = SvPV(sv, len); else return 1; send = sbegin + len; s = sbegin; while (isSPACE(*s)) s++; if (*s == '-') { s++; numtype = IS_NUMBER_NEG; } else if (*s == '+') s++; nbegin = s; /* * we return 1 if the number can be converted to _integer_ with atol() * and 2 if you need (int)atof(). */ /* next must be digit or '.' */ if (isDIGIT(*s)) { do { s++; } while (isDIGIT(*s)); if (s - nbegin >= TYPE_DIGITS(IV)) /* Cannot cache ato[ul]() */ numtype |= IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV; else numtype |= IS_NUMBER_TO_INT_BY_ATOL; if (*s == '.') { s++; numtype |= IS_NUMBER_NOT_IV; while (isDIGIT(*s)) /* optional digits after "." */ s++; } } else if (*s == '.') { s++; numtype |= IS_NUMBER_TO_INT_BY_ATOL | IS_NUMBER_NOT_IV; /* no digits before '.' means we need digits after it */ if (isDIGIT(*s)) { do { s++; } while (isDIGIT(*s)); } else return 0; } else return 0; /* we can have an optional exponent part */ if (*s == 'e' || *s == 'E') { numtype &= ~IS_NUMBER_NEG; numtype |= IS_NUMBER_TO_INT_BY_ATOF | IS_NUMBER_NOT_IV; s++; if (*s == '+' || *s == '-') s++; if (isDIGIT(*s)) { do { s++; } while (isDIGIT(*s)); } else return 0; } while (isSPACE(*s)) s++; if (s >= send) return numtype; if (len == 10 && memEQ(sbegin, "0 but true", 10)) return IS_NUMBER_TO_INT_BY_ATOL; return 0; } char * Perl_sv_2pv_nolen(pTHX_ register SV *sv) { STRLEN n_a; return sv_2pv(sv, &n_a); } /* We assume that buf is at least TYPE_CHARS(UV) long. */ static char * uiv_2buf(char *buf, IV iv, UV uv, int is_uv, char **peob) { STRLEN len; char *ptr = buf + TYPE_CHARS(UV); char *ebuf = ptr; int sign; char *p; if (is_uv) sign = 0; else if (iv >= 0) { uv = iv; sign = 0; } else { uv = -iv; sign = 1; } do { *--ptr = '0' + (uv % 10); } while (uv /= 10); if (sign) *--ptr = '-'; *peob = ebuf; return ptr; } char * Perl_sv_2pv(pTHX_ register SV *sv, STRLEN *lp) { register char *s; int olderrno; SV *tsv; char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */ char *tmpbuf = tbuf; if (!sv) { *lp = 0; return ""; } if (SvGMAGICAL(sv)) { mg_get(sv); if (SvPOKp(sv)) { *lp = SvCUR(sv); return SvPVX(sv); } if (SvIOKp(sv)) { /* XXXX 64-bit? */ if (SvIsUV(sv)) (void)sprintf(tmpbuf,"%lu",(unsigned long)SvUVX(sv)); else (void)sprintf(tmpbuf,"%ld",(long)SvIVX(sv)); tsv = Nullsv; goto tokensave; } if (SvNOKp(sv)) { SET_NUMERIC_STANDARD(); Gconvert(SvNVX(sv), DBL_DIG, 0, tmpbuf); tsv = Nullsv; goto tokensave; } if (!SvROK(sv)) { if (!(SvFLAGS(sv) & SVs_PADTMP)) { dTHR; if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); } *lp = 0; return ""; } } if (SvTHINKFIRST(sv)) { if (SvROK(sv)) { SV* tmpstr; if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string))) return SvPV(tmpstr,*lp); sv = (SV*)SvRV(sv); if (!sv) s = "NULLREF"; else { MAGIC *mg; switch (SvTYPE(sv)) { case SVt_PVMG: if ( ((SvFLAGS(sv) & (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG)) == (SVs_OBJECT|SVs_RMG)) && strEQ(s=HvNAME(SvSTASH(sv)), "Regexp") && (mg = mg_find(sv, 'r'))) { dTHR; regexp *re = (regexp *)mg->mg_obj; if (!mg->mg_ptr) { char *fptr = "msix"; char reflags[6]; char ch; int left = 0; int right = 4; U16 reganch = (re->reganch & PMf_COMPILETIME) >> 12; while(ch = *fptr++) { if(reganch & 1) { reflags[left++] = ch; } else { reflags[right--] = ch; } reganch >>= 1; } if(left != 4) { reflags[left] = '-'; left = 5; } mg->mg_len = re->prelen + 4 + left; New(616, mg->mg_ptr, mg->mg_len + 1 + left, char); Copy("(?", mg->mg_ptr, 2, char); Copy(reflags, mg->mg_ptr+2, left, char); Copy(":", mg->mg_ptr+left+2, 1, char); Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char); mg->mg_ptr[mg->mg_len - 1] = ')'; mg->mg_ptr[mg->mg_len] = 0; } PL_reginterp_cnt += re->program[0].next_off; *lp = mg->mg_len; return mg->mg_ptr; } /* Fall through */ case SVt_NULL: case SVt_IV: case SVt_NV: case SVt_RV: case SVt_PV: case SVt_PVIV: case SVt_PVNV: case SVt_PVBM: s = "SCALAR"; break; case SVt_PVLV: s = "LVALUE"; break; case SVt_PVAV: s = "ARRAY"; break; case SVt_PVHV: s = "HASH"; break; case SVt_PVCV: s = "CODE"; break; case SVt_PVGV: s = "GLOB"; break; case SVt_PVFM: s = "FORMAT"; break; case SVt_PVIO: s = "IO"; break; default: s = "UNKNOWN"; break; } tsv = NEWSV(0,0); if (SvOBJECT(sv)) Perl_sv_setpvf(aTHX_ tsv, "%s=%s", HvNAME(SvSTASH(sv)), s); else sv_setpv(tsv, s); /* XXXX 64-bit? */ Perl_sv_catpvf(aTHX_ tsv, "(0x%lx)", (unsigned long)sv); goto tokensaveref; } *lp = strlen(s); return s; } if (SvREADONLY(sv)) { if (SvNOKp(sv)) { /* See note in sv_2uv() */ /* XXXX 64-bit? IV may have better precision... */ SET_NUMERIC_STANDARD(); Gconvert(SvNVX(sv), DBL_DIG, 0, tmpbuf); tsv = Nullsv; goto tokensave; } if (SvIOKp(sv)) { char *ebuf; if (SvIsUV(sv)) tmpbuf = uiv_2buf(tbuf, 0, SvUVX(sv), 1, &ebuf); else tmpbuf = uiv_2buf(tbuf, SvIVX(sv), 0, 0, &ebuf); *ebuf = 0; tsv = Nullsv; goto tokensave; } { dTHR; if (ckWARN(WARN_UNINITIALIZED)) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); } *lp = 0; return ""; } } if (SvNOKp(sv)) { /* See note in sv_2uv() */ /* XXXX 64-bit? IV may have better precision... */ if (SvTYPE(sv) < SVt_PVNV) sv_upgrade(sv, SVt_PVNV); SvGROW(sv, 28); s = SvPVX(sv); olderrno = errno; /* some Xenix systems wipe out errno here */ #ifdef apollo if (SvNVX(sv) == 0.0) (void)strcpy(s,"0"); else #endif /*apollo*/ { SET_NUMERIC_STANDARD(); Gconvert(SvNVX(sv), DBL_DIG, 0, s); } errno = olderrno; #ifdef FIXNEGATIVEZERO if (*s == '-' && s[1] == '0' && !s[2]) strcpy(s,"0"); #endif while (*s) s++; #ifdef hcx if (s[-1] == '.') *--s = '\0'; #endif } else if (SvIOKp(sv)) { U32 isIOK = SvIOK(sv); char buf[TYPE_CHARS(UV)]; char *ebuf, *ptr; if (SvTYPE(sv) < SVt_PVIV) sv_upgrade(sv, SVt_PVIV); if (SvIsUV(sv)) { ptr = uiv_2buf(buf, 0, SvUVX(sv), 1, &ebuf); sv_setpvn(sv, ptr, ebuf - ptr); SvIsUV_on(sv); } else { ptr = uiv_2buf(buf, SvIVX(sv), 0, 0, &ebuf); sv_setpvn(sv, ptr, ebuf - ptr); } s = SvEND(sv); if (isIOK) SvIOK_on(sv); else SvIOKp_on(sv); } else { dTHR; if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP)) Perl_warner(aTHX_ WARN_UNINITIALIZED, PL_warn_uninit); *lp = 0; if (SvTYPE(sv) < SVt_PV) /* Typically the caller expects that sv_any is not NULL now. */ sv_upgrade(sv, SVt_PV); return ""; } *lp = s - SvPVX(sv); SvCUR_set(sv, *lp); SvPOK_on(sv); DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2pv(%s)\n",(unsigned long)sv,SvPVX(sv))); return SvPVX(sv); tokensave: if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */ /* Sneaky stuff here */ tokensaveref: if (!tsv) tsv = newSVpv(tmpbuf, 0); sv_2mortal(tsv); *lp = SvCUR(tsv); return SvPVX(tsv); } else { STRLEN len; char *t; if (tsv) { sv_2mortal(tsv); t = SvPVX(tsv); len = SvCUR(tsv); } else { t = tmpbuf; len = strlen(tmpbuf); } #ifdef FIXNEGATIVEZERO if (len == 2 && t[0] == '-' && t[1] == '0') { t = "0"; len = 1; } #endif (void)SvUPGRADE(sv, SVt_PV); *lp = len; s = SvGROW(sv, len + 1); SvCUR_set(sv, len); (void)strcpy(s, t); SvPOKp_on(sv); return s; } } /* This function is only called on magical items */ bool Perl_sv_2bool(pTHX_ register SV *sv) { if (SvGMAGICAL(sv)) mg_get(sv); if (!SvOK(sv)) return 0; if (SvROK(sv)) { dTHR; SV* tmpsv; if (SvAMAGIC(sv) && (tmpsv = AMG_CALLun(sv,bool_))) return SvTRUE(tmpsv); return SvRV(sv) != 0; } if (SvPOKp(sv)) { register XPV* Xpvtmp; if ((Xpvtmp = (XPV*)SvANY(sv)) && (*Xpvtmp->xpv_pv > '0' || Xpvtmp->xpv_cur > 1 || (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0'))) return 1; else return 0; } else { if (SvIOKp(sv)) return SvIVX(sv) != 0; else { if (SvNOKp(sv)) return SvNVX(sv) != 0.0; else return FALSE; } } } /* Note: sv_setsv() should not be called with a source string that needs * to be reused, since it may destroy the source string if it is marked * as temporary. */ void Perl_sv_setsv(pTHX_ SV *dstr, register SV *sstr) { dTHR; register U32 sflags; register int dtype; register int stype; if (sstr == dstr) return; SV_CHECK_THINKFIRST(dstr); if (!sstr) sstr = &PL_sv_undef; stype = SvTYPE(sstr); dtype = SvTYPE(dstr); SvAMAGIC_off(dstr); /* There's a lot of redundancy below but we're going for speed here */ switch (stype) { case SVt_NULL: undef_sstr: if (dtype != SVt_PVGV) { (void)SvOK_off(dstr); return; } break; case SVt_IV: if (SvIOK(sstr)) { switch (dtype) { case SVt_NULL: sv_upgrade(dstr, SVt_IV); break; case SVt_NV: sv_upgrade(dstr, SVt_PVNV); break; case SVt_RV: case SVt_PV: sv_upgrade(dstr, SVt_PVIV); break; } (void)SvIOK_only(dstr); SvIVX(dstr) = SvIVX(sstr); if (SvIsUV(sstr)) SvIsUV_on(dstr); SvTAINT(dstr); return; } goto undef_sstr; case SVt_NV: if (SvNOK(sstr)) { switch (dtype) { case SVt_NULL: case SVt_IV: sv_upgrade(dstr, SVt_NV); break; case SVt_RV: case SVt_PV: case SVt_PVIV: sv_upgrade(dstr, SVt_PVNV); break; } SvNVX(dstr) = SvNVX(sstr); (void)SvNOK_only(dstr); SvTAINT(dstr); return; } goto undef_sstr; case SVt_RV: if (dtype < SVt_RV) sv_upgrade(dstr, SVt_RV); else if (dtype == SVt_PVGV && SvTYPE(SvRV(sstr)) == SVt_PVGV) { sstr = SvRV(sstr); if (sstr == dstr) { if (PL_curcop->cop_stash != GvSTASH(dstr)) GvIMPORTED_on(dstr); GvMULTI_on(dstr); return; } goto glob_assign; } break; case SVt_PV: case SVt_PVFM: if (dtype < SVt_PV) sv_upgrade(dstr, SVt_PV); break; case SVt_PVIV: if (dtype < SVt_PVIV) sv_upgrade(dstr, SVt_PVIV); break; case SVt_PVNV: if (dtype < SVt_PVNV) sv_upgrade(dstr, SVt_PVNV); break; case SVt_PVAV: case SVt_PVHV: case SVt_PVCV: case SVt_PVIO: if (PL_op) Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0), PL_op_name[PL_op->op_type]); else Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0)); break; case SVt_PVGV: if (dtype <= SVt_PVGV) { glob_assign: if (dtype != SVt_PVGV) { char *name = GvNAME(sstr); STRLEN len = GvNAMELEN(sstr); sv_upgrade(dstr, SVt_PVGV); sv_magic(dstr, dstr, '*', name, len); GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr)); GvNAME(dstr) = savepvn(name, len); GvNAMELEN(dstr) = len; SvFAKE_on(dstr); /* can coerce to non-glob */ } /* ahem, death to those who redefine active sort subs */ else if (PL_curstackinfo->si_type == PERLSI_SORT && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr))) Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", GvNAME(dstr)); (void)SvOK_off(dstr); GvINTRO_off(dstr); /* one-shot flag */ gp_free((GV*)dstr); GvGP(dstr) = gp_ref(GvGP(sstr)); SvTAINT(dstr); if (PL_curcop->cop_stash != GvSTASH(dstr)) GvIMPORTED_on(dstr); GvMULTI_on(dstr); return; } /* FALL THROUGH */ default: if (SvGMAGICAL(sstr)) { mg_get(sstr); if (SvTYPE(sstr) != stype) { stype = SvTYPE(sstr); if (stype == SVt_PVGV && dtype <= SVt_PVGV) goto glob_assign; } } if (stype == SVt_PVLV) (void)SvUPGRADE(dstr, SVt_PVNV); else (void)SvUPGRADE(dstr, stype); } sflags = SvFLAGS(sstr); if (sflags & SVf_ROK) { if (dtype >= SVt_PV) { if (dtype == SVt_PVGV) { SV *sref = SvREFCNT_inc(SvRV(sstr)); SV *dref = 0; int intro = GvINTRO(dstr); if (intro) { GP *gp; GvGP(dstr)->gp_refcnt--; GvINTRO_off(dstr); /* one-shot flag */ Newz(602,gp, 1, GP); GvGP(dstr) = gp_ref(gp); GvSV(dstr) = NEWSV(72,0); GvLINE(dstr) = PL_curcop->cop_line; GvEGV(dstr) = (GV*)dstr; } GvMULTI_on(dstr); switch (SvTYPE(sref)) { case SVt_PVAV: if (intro) SAVESPTR(GvAV(dstr)); else dref = (SV*)GvAV(dstr); GvAV(dstr) = (AV*)sref; if (PL_curcop->cop_stash != GvSTASH(dstr)) GvIMPORTED_AV_on(dstr); break; case SVt_PVHV: if (intro) SAVESPTR(GvHV(dstr)); else dref = (SV*)GvHV(dstr); GvHV(dstr) = (HV*)sref; if (PL_curcop->cop_stash != GvSTASH(dstr)) GvIMPORTED_HV_on(dstr); break; case SVt_PVCV: if (intro) { if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) { SvREFCNT_dec(GvCV(dstr)); GvCV(dstr) = Nullcv; GvCVGEN(dstr) = 0; /* Switch off cacheness. */ PL_sub_generation++; } SAVESPTR(GvCV(dstr)); } else dref = (SV*)GvCV(dstr); if (GvCV(dstr) != (CV*)sref) { CV* cv = GvCV(dstr); if (cv) { if (!GvCVGEN((GV*)dstr) && (CvROOT(cv) || CvXSUB(cv))) { SV *const_sv = cv_const_sv(cv); bool const_changed = TRUE; if(const_sv) const_changed = sv_cmp(const_sv, op_const_sv(CvSTART((CV*)sref), Nullcv)); /* ahem, death to those who redefine * active sort subs */ if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv)) Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", GvENAME((GV*)dstr)); if (ckWARN(WARN_REDEFINE) || (const_changed && const_sv)) { if (!(CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))) && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) Perl_warner(aTHX_ WARN_REDEFINE, const_sv ? "Constant subroutine %s redefined" : "Subroutine %s redefined", GvENAME((GV*)dstr)); } } cv_ckproto(cv, (GV*)dstr, SvPOK(sref) ? SvPVX(sref) : Nullch); } GvCV(dstr) = (CV*)sref; GvCVGEN(dstr) = 0; /* Switch off cacheness. */ GvASSUMECV_on(dstr); PL_sub_generation++; } if (PL_curcop->cop_stash != GvSTASH(dstr)) GvIMPORTED_CV_on(dstr); break; case SVt_PVIO: if (intro) SAVESPTR(GvIOp(dstr)); else dref = (SV*)GvIOp(dstr); GvIOp(dstr) = (IO*)sref; break; default: if (intro) SAVESPTR(GvSV(dstr)); else dref = (SV*)GvSV(dstr); GvSV(dstr) = sref; if (PL_curcop->cop_stash != GvSTASH(dstr)) GvIMPORTED_SV_on(dstr); break; } if (dref) SvREFCNT_dec(dref); if (intro) SAVEFREESV(sref); SvTAINT(dstr); return; } if (SvPVX(dstr)) { (void)SvOOK_off(dstr); /* backoff */ if (SvLEN(dstr)) Safefree(SvPVX(dstr)); SvLEN(dstr)=SvCUR(dstr)=0; } } (void)SvOK_off(dstr); SvRV(dstr) = SvREFCNT_inc(SvRV(sstr)); SvROK_on(dstr); if (sflags & SVp_NOK) { SvNOK_on(dstr); SvNVX(dstr) = SvNVX(sstr); } if (sflags & SVp_IOK) { (void)SvIOK_on(dstr); SvIVX(dstr) = SvIVX(sstr); if (SvIsUV(sstr)) SvIsUV_on(dstr); } if (SvAMAGIC(sstr)) { SvAMAGIC_on(dstr); } } else if (sflags & SVp_POK) { /* * Check to see if we can just swipe the string. If so, it's a * possible small lose on short strings, but a big win on long ones. * It might even be a win on short strings if SvPVX(dstr) * has to be allocated and SvPVX(sstr) has to be freed. */ if (SvTEMP(sstr) && /* slated for free anyway? */ SvREFCNT(sstr) == 1 && /* and no other references to it? */ !(sflags & SVf_OOK)) /* and not involved in OOK hack? */ { if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */ if (SvOOK(dstr)) { SvFLAGS(dstr) &= ~SVf_OOK; Safefree(SvPVX(dstr) - SvIVX(dstr)); } else if (SvLEN(dstr)) Safefree(SvPVX(dstr)); } (void)SvPOK_only(dstr); SvPV_set(dstr, SvPVX(sstr)); SvLEN_set(dstr, SvLEN(sstr)); SvCUR_set(dstr, SvCUR(sstr)); SvTEMP_off(dstr); (void)SvOK_off(sstr); SvPV_set(sstr, Nullch); SvLEN_set(sstr, 0); SvCUR_set(sstr, 0); SvTEMP_off(sstr); } else { /* have to copy actual string */ STRLEN len = SvCUR(sstr); SvGROW(dstr, len + 1); /* inlined from sv_setpvn */ Move(SvPVX(sstr),SvPVX(dstr),len,char); SvCUR_set(dstr, len); *SvEND(dstr) = '\0'; (void)SvPOK_only(dstr); } /*SUPPRESS 560*/ if (sflags & SVp_NOK) { SvNOK_on(dstr); SvNVX(dstr) = SvNVX(sstr); } if (sflags & SVp_IOK) { (void)SvIOK_on(dstr); SvIVX(dstr) = SvIVX(sstr); if (SvIsUV(sstr)) SvIsUV_on(dstr); } } else if (sflags & SVp_NOK) { SvNVX(dstr) = SvNVX(sstr); (void)SvNOK_only(dstr); if (SvIOK(sstr)) { (void)SvIOK_on(dstr); SvIVX(dstr) = SvIVX(sstr); /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */ if (SvIsUV(sstr)) SvIsUV_on(dstr); } } else if (sflags & SVp_IOK) { (void)SvIOK_only(dstr); SvIVX(dstr) = SvIVX(sstr); if (SvIsUV(sstr)) SvIsUV_on(dstr); } else { if (dtype == SVt_PVGV) { if (ckWARN(WARN_UNSAFE)) Perl_warner(aTHX_ WARN_UNSAFE, "Undefined value assigned to typeglob"); } else (void)SvOK_off(dstr); } SvTAINT(dstr); } void Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr) { sv_setsv(dstr,sstr); SvSETMAGIC(dstr); } void Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len) { register char *dptr; assert(len >= 0); /* STRLEN is probably unsigned, so this may elicit a warning, but it won't hurt. */ SV_CHECK_THINKFIRST(sv); if (!ptr) { (void)SvOK_off(sv); return; } (void)SvUPGRADE(sv, SVt_PV); SvGROW(sv, len + 1); dptr = SvPVX(sv); Move(ptr,dptr,len,char); dptr[len] = '\0'; SvCUR_set(sv, len); (void)SvPOK_only(sv); /* validate pointer */ SvTAINT(sv); } void Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len) { sv_setpvn(sv,ptr,len); SvSETMAGIC(sv); } void Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr) { register STRLEN len; SV_CHECK_THINKFIRST(sv); if (!ptr) { (void)SvOK_off(sv); return; } len = strlen(ptr); (void)SvUPGRADE(sv, SVt_PV); SvGROW(sv, len + 1); Move(ptr,SvPVX(sv),len+1,char); SvCUR_set(sv, len); (void)SvPOK_only(sv); /* validate pointer */ SvTAINT(sv); } void Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr) { sv_setpv(sv,ptr); SvSETMAGIC(sv); } void Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len) { SV_CHECK_THINKFIRST(sv); (void)SvUPGRADE(sv, SVt_PV); if (!ptr) { (void)SvOK_off(sv); return; } (void)SvOOK_off(sv); if (SvPVX(sv) && SvLEN(sv)) Safefree(SvPVX(sv)); Renew(ptr, len+1, char); SvPVX(sv) = ptr; SvCUR_set(sv, len); SvLEN_set(sv, len+1); *SvEND(sv) = '\0'; (void)SvPOK_only(sv); /* validate pointer */ SvTAINT(sv); } void Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len) { sv_usepvn(sv,ptr,len); SvSETMAGIC(sv); } void Perl_sv_force_normal(pTHX_ register SV *sv) { if (SvREADONLY(sv)) { dTHR; if (PL_curcop != &PL_compiling) Perl_croak(aTHX_ PL_no_modify); } if (SvROK(sv)) sv_unref(sv); else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV) sv_unglob(sv); } void Perl_sv_chop(pTHX_ register SV *sv, register char *ptr) /* like set but assuming ptr is in sv */ { register STRLEN delta; if (!ptr || !SvPOKp(sv)) return; SV_CHECK_THINKFIRST(sv); if (SvTYPE(sv) < SVt_PVIV) sv_upgrade(sv,SVt_PVIV); if (!SvOOK(sv)) { if (!SvLEN(sv)) { /* make copy of shared string */ char *pvx = SvPVX(sv); STRLEN len = SvCUR(sv); SvGROW(sv, len + 1); Move(pvx,SvPVX(sv),len,char); *SvEND(sv) = '\0'; } SvIVX(sv) = 0; SvFLAGS(sv) |= SVf_OOK; } SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK|SVf_IVisUV); delta = ptr - SvPVX(sv); SvLEN(sv) -= delta; SvCUR(sv) -= delta; SvPVX(sv) += delta; SvIVX(sv) += delta; } void Perl_sv_catpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len) { STRLEN tlen; char *junk; junk = SvPV_force(sv, tlen); SvGROW(sv, tlen + len + 1); if (ptr == junk) ptr = SvPVX(sv); Move(ptr,SvPVX(sv)+tlen,len,char); SvCUR(sv) += len; *SvEND(sv) = '\0'; (void)SvPOK_only(sv); /* validate pointer */ SvTAINT(sv); } void Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len) { sv_catpvn(sv,ptr,len); SvSETMAGIC(sv); } void Perl_sv_catsv(pTHX_ SV *dstr, register SV *sstr) { char *s; STRLEN len; if (!sstr) return; if (s = SvPV(sstr, len)) sv_catpvn(dstr,s,len); } void Perl_sv_catsv_mg(pTHX_ SV *dstr, register SV *sstr) { sv_catsv(dstr,sstr); SvSETMAGIC(dstr); } void Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr) { register STRLEN len; STRLEN tlen; char *junk; if (!ptr) return; junk = SvPV_force(sv, tlen); len = strlen(ptr); SvGROW(sv, tlen + len + 1); if (ptr == junk) ptr = SvPVX(sv); Move(ptr,SvPVX(sv)+tlen,len+1,char); SvCUR(sv) += len; (void)SvPOK_only(sv); /* validate pointer */ SvTAINT(sv); } void Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr) { sv_catpv(sv,ptr); SvSETMAGIC(sv); } SV * Perl_newSV(pTHX_ STRLEN len) { register SV *sv; new_SV(sv); if (len) { sv_upgrade(sv, SVt_PV); SvGROW(sv, len + 1); } return sv; } /* name is assumed to contain an SV* if (name && namelen == HEf_SVKEY) */ void Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen) { MAGIC* mg; if (SvREADONLY(sv)) { dTHR; if (PL_curcop != &PL_compiling && !strchr("gBf", how)) Perl_croak(aTHX_ PL_no_modify); } if (SvMAGICAL(sv) || (how == 't' && SvTYPE(sv) >= SVt_PVMG)) { if (SvMAGIC(sv) && (mg = mg_find(sv, how))) { if (how == 't') mg->mg_len |= 1; return; } } else { (void)SvUPGRADE(sv, SVt_PVMG); } Newz(702,mg, 1, MAGIC); mg->mg_moremagic = SvMAGIC(sv); SvMAGIC(sv) = mg; if (!obj || obj == sv || how == '#' || how == 'r') mg->mg_obj = obj; else { dTHR; mg->mg_obj = SvREFCNT_inc(obj); mg->mg_flags |= MGf_REFCOUNTED; } mg->mg_type = how; mg->mg_len = namlen; if (name) if (namlen >= 0) mg->mg_ptr = savepvn(name, namlen); else if (namlen == HEf_SVKEY) mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name); switch (how) { case 0: mg->mg_virtual = &PL_vtbl_sv; break; case 'A': mg->mg_virtual = &PL_vtbl_amagic; break; case 'a': mg->mg_virtual = &PL_vtbl_amagicelem; break; case 'c': mg->mg_virtual = 0; break; case 'B': mg->mg_virtual = &PL_vtbl_bm; break; case 'D': mg->mg_virtual = &PL_vtbl_regdata; break; case 'd': mg->mg_virtual = &PL_vtbl_regdatum; break; case 'E': mg->mg_virtual = &PL_vtbl_env; break; case 'f': mg->mg_virtual = &PL_vtbl_fm; break; case 'e': mg->mg_virtual = &PL_vtbl_envelem; break; case 'g': mg->mg_virtual = &PL_vtbl_mglob; break; case 'I': mg->mg_virtual = &PL_vtbl_isa; break; case 'i': mg->mg_virtual = &PL_vtbl_isaelem; break; case 'k': mg->mg_virtual = &PL_vtbl_nkeys; break; case 'L': SvRMAGICAL_on(sv); mg->mg_virtual = 0; break; case 'l': mg->mg_virtual = &PL_vtbl_dbline; break; #ifdef USE_THREADS case 'm': mg->mg_virtual = &PL_vtbl_mutex; break; #endif /* USE_THREADS */ #ifdef USE_LOCALE_COLLATE case 'o': mg->mg_virtual = &PL_vtbl_collxfrm; break; #endif /* USE_LOCALE_COLLATE */ case 'P': mg->mg_virtual = &PL_vtbl_pack; break; case 'p': case 'q': mg->mg_virtual = &PL_vtbl_packelem; break; case 'r': mg->mg_virtual = &PL_vtbl_regexp; break; case 'S': mg->mg_virtual = &PL_vtbl_sig; break; case 's': mg->mg_virtual = &PL_vtbl_sigelem; break; case 't': mg->mg_virtual = &PL_vtbl_taint; mg->mg_len = 1; break; case 'U': mg->mg_virtual = &PL_vtbl_uvar; break; case 'v': mg->mg_virtual = &PL_vtbl_vec; break; case 'x': mg->mg_virtual = &PL_vtbl_substr; break; case 'y': mg->mg_virtual = &PL_vtbl_defelem; break; case '*': mg->mg_virtual = &PL_vtbl_glob; break; case '#': mg->mg_virtual = &PL_vtbl_arylen; break; case '.': mg->mg_virtual = &PL_vtbl_pos; break; case '<': mg->mg_virtual = &PL_vtbl_backref; break; case '~': /* Reserved for use by extensions not perl internals. */ /* Useful for attaching extension internal data to perl vars. */ /* Note that multiple extensions may clash if magical scalars */ /* etc holding private data from one are passed to another. */ SvRMAGICAL_on(sv); break; default: Perl_croak(aTHX_ "Don't know how to handle magic of type '%c'", how); } mg_magical(sv); if (SvGMAGICAL(sv)) SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK); } int Perl_sv_unmagic(pTHX_ SV *sv, int type) { MAGIC* mg; MAGIC** mgp; if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv)) return 0; mgp = &SvMAGIC(sv); for (mg = *mgp; mg; mg = *mgp) { if (mg->mg_type == type) { MGVTBL* vtbl = mg->mg_virtual; *mgp = mg->mg_moremagic; if (vtbl && (vtbl->svt_free != NULL)) (VTBL->svt_free)(aTHX_ sv, mg); if (mg->mg_ptr && mg->mg_type != 'g') if (mg->mg_len >= 0) Safefree(mg->mg_ptr); else if (mg->mg_len == HEf_SVKEY) SvREFCNT_dec((SV*)mg->mg_ptr); if (mg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(mg->mg_obj); Safefree(mg); } else mgp = &mg->mg_moremagic; } if (!SvMAGIC(sv)) { SvMAGICAL_off(sv); SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT; } return 0; } SV * Perl_sv_rvweaken(pTHX_ SV *sv) { SV *tsv; if (!SvOK(sv)) /* let undefs pass */ return sv; if (!SvROK(sv)) Perl_croak(aTHX_ "Can't weaken a nonreference"); else if (SvWEAKREF(sv)) { dTHR; if (ckWARN(WARN_MISC)) Perl_warner(aTHX_ WARN_MISC, "Reference is already weak"); return sv; } tsv = SvRV(sv); sv_add_backref(tsv, sv); SvWEAKREF_on(sv); SvREFCNT_dec(tsv); return sv; } STATIC void S_sv_add_backref(pTHX_ SV *tsv, SV *sv) { AV *av; MAGIC *mg; if (SvMAGICAL(tsv) && (mg = mg_find(tsv, '<'))) av = (AV*)mg->mg_obj; else { av = newAV(); sv_magic(tsv, (SV*)av, '<', NULL, 0); SvREFCNT_dec(av); /* for sv_magic */ } av_push(av,sv); } STATIC void S_sv_del_backref(pTHX_ SV *sv) { AV *av; SV **svp; I32 i; SV *tsv = SvRV(sv); MAGIC *mg; if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, '<'))) Perl_croak(aTHX_ "panic: del_backref"); av = (AV *)mg->mg_obj; svp = AvARRAY(av); i = AvFILLp(av); while (i >= 0) { if (svp[i] == sv) { svp[i] = &PL_sv_undef; /* XXX */ } i--; } } void Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen) { register char *big; register char *mid; register char *midend; register char *bigend; register I32 i; STRLEN curlen; if (!bigstr) Perl_croak(aTHX_ "Can't modify non-existent substring"); SvPV_force(bigstr, curlen); if (offset + len > curlen) { SvGROW(bigstr, offset+len+1); Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char); SvCUR_set(bigstr, offset+len); } i = littlelen - len; if (i > 0) { /* string might grow */ big = SvGROW(bigstr, SvCUR(bigstr) + i + 1); mid = big + offset + len; midend = bigend = big + SvCUR(bigstr); bigend += i; *bigend = '\0'; while (midend > mid) /* shove everything down */ *--bigend = *--midend; Move(little,big+offset,littlelen,char); SvCUR(bigstr) += i; SvSETMAGIC(bigstr); return; } else if (i == 0) { Move(little,SvPVX(bigstr)+offset,len,char); SvSETMAGIC(bigstr); return; } big = SvPVX(bigstr); mid = big + offset; midend = mid + len; bigend = big + SvCUR(bigstr); if (midend > bigend) Perl_croak(aTHX_ "panic: sv_insert"); if (mid - big > bigend - midend) { /* faster to shorten from end */ if (littlelen) { Move(little, mid, littlelen,char); mid += littlelen; } i = bigend - midend; if (i > 0) { Move(midend, mid, i,char); mid += i; } *mid = '\0'; SvCUR_set(bigstr, mid - big); } /*SUPPRESS 560*/ else if (i = mid - big) { /* faster from front */ midend -= littlelen; mid = midend; sv_chop(bigstr,midend-i); big += i; while (i--) *--midend = *--big; if (littlelen) Move(little, mid, littlelen,char); } else if (littlelen) { midend -= littlelen; sv_chop(bigstr,midend); Move(little,midend,littlelen,char); } else { sv_chop(bigstr,midend); } SvSETMAGIC(bigstr); } /* make sv point to what nstr did */ void Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv) { U32 refcnt = SvREFCNT(sv); SV_CHECK_THINKFIRST(sv); if (SvREFCNT(nsv) != 1) Perl_warn(aTHX_ "Reference miscount in sv_replace()"); if (SvMAGICAL(sv)) { if (SvMAGICAL(nsv)) mg_free(nsv); else sv_upgrade(nsv, SVt_PVMG); SvMAGIC(nsv) = SvMAGIC(sv); SvFLAGS(nsv) |= SvMAGICAL(sv); SvMAGICAL_off(sv); SvMAGIC(sv) = 0; } SvREFCNT(sv) = 0; sv_clear(sv); assert(!SvREFCNT(sv)); StructCopy(nsv,sv,SV); SvREFCNT(sv) = refcnt; SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */ del_SV(nsv); } void Perl_sv_clear(pTHX_ register SV *sv) { HV* stash; assert(sv); assert(SvREFCNT(sv) == 0); if (SvOBJECT(sv)) { dTHR; if (PL_defstash) { /* Still have a symbol table? */ djSP; GV* destructor; SV tmpref; Zero(&tmpref, 1, SV); sv_upgrade(&tmpref, SVt_RV); SvROK_on(&tmpref); SvREADONLY_on(&tmpref); /* DESTROY() could be naughty */ SvREFCNT(&tmpref) = 1; do { stash = SvSTASH(sv); destructor = gv_fetchmethod(SvSTASH(sv), "DESTROY"); if (destructor) { ENTER; PUSHSTACKi(PERLSI_DESTROY); SvRV(&tmpref) = SvREFCNT_inc(sv); EXTEND(SP, 2); PUSHMARK(SP); PUSHs(&tmpref); PUTBACK; call_sv((SV*)GvCV(destructor), G_DISCARD|G_EVAL|G_KEEPERR); SvREFCNT(sv)--; POPSTACK; SPAGAIN; LEAVE; } } while (SvOBJECT(sv) && SvSTASH(sv) != stash); del_XRV(SvANY(&tmpref)); if (SvREFCNT(sv)) { if (PL_in_clean_objs) Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'", HvNAME(stash)); /* DESTROY gave object new lease on life */ return; } } if (SvOBJECT(sv)) { SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */ SvOBJECT_off(sv); /* Curse the object. */ if (SvTYPE(sv) != SVt_PVIO) --PL_sv_objcount; /* XXX Might want something more general */ } } if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) mg_free(sv); stash = NULL; switch (SvTYPE(sv)) { case SVt_PVIO: if (IoIFP(sv) && IoIFP(sv) != PerlIO_stdin() && IoIFP(sv) != PerlIO_stdout() && IoIFP(sv) != PerlIO_stderr()) { io_close((IO*)sv); } if (IoDIRP(sv)) { PerlDir_close(IoDIRP(sv)); IoDIRP(sv) = 0; } Safefree(IoTOP_NAME(sv)); Safefree(IoFMT_NAME(sv)); Safefree(IoBOTTOM_NAME(sv)); /* FALL THROUGH */ case SVt_PVBM: goto freescalar; case SVt_PVCV: case SVt_PVFM: cv_undef((CV*)sv); goto freescalar; case SVt_PVHV: hv_undef((HV*)sv); break; case SVt_PVAV: av_undef((AV*)sv); break; case SVt_PVLV: SvREFCNT_dec(LvTARG(sv)); goto freescalar; case SVt_PVGV: gp_free((GV*)sv); Safefree(GvNAME(sv)); /* cannot decrease stash refcount yet, as we might recursively delete ourselves when the refcnt drops to zero. Delay SvREFCNT_dec of stash until current sv is completely gone. -- JohnPC, 27 Mar 1998 */ stash = GvSTASH(sv); /* FALL THROUGH */ case SVt_PVMG: case SVt_PVNV: case SVt_PVIV: freescalar: (void)SvOOK_off(sv); /* FALL THROUGH */ case SVt_PV: case SVt_RV: if (SvROK(sv)) { if (SvWEAKREF(sv)) sv_del_backref(sv); else SvREFCNT_dec(SvRV(sv)); } else if (SvPVX(sv) && SvLEN(sv)) Safefree(SvPVX(sv)); break; /* case SVt_NV: case SVt_IV: case SVt_NULL: break; */ } switch (SvTYPE(sv)) { case SVt_NULL: break; case SVt_IV: del_XIV(SvANY(sv)); break; case SVt_NV: del_XNV(SvANY(sv)); break; case SVt_RV: del_XRV(SvANY(sv)); break; case SVt_PV: del_XPV(SvANY(sv)); break; case SVt_PVIV: del_XPVIV(SvANY(sv)); break; case SVt_PVNV: del_XPVNV(SvANY(sv)); break; case SVt_PVMG: del_XPVMG(SvANY(sv)); break; case SVt_PVLV: del_XPVLV(SvANY(sv)); break; case SVt_PVAV: del_XPVAV(SvANY(sv)); break; case SVt_PVHV: del_XPVHV(SvANY(sv)); break; case SVt_PVCV: del_XPVCV(SvANY(sv)); break; case SVt_PVGV: del_XPVGV(SvANY(sv)); /* code duplication for increased performance. */ SvFLAGS(sv) &= SVf_BREAK; SvFLAGS(sv) |= SVTYPEMASK; /* decrease refcount of the stash that owns this GV, if any */ if (stash) SvREFCNT_dec(stash); return; /* not break, SvFLAGS reset already happened */ case SVt_PVBM: del_XPVBM(SvANY(sv)); break; case SVt_PVFM: del_XPVFM(SvANY(sv)); break; case SVt_PVIO: del_XPVIO(SvANY(sv)); break; } SvFLAGS(sv) &= SVf_BREAK; SvFLAGS(sv) |= SVTYPEMASK; } SV * Perl_sv_newref(pTHX_ SV *sv) { if (sv) ATOMIC_INC(SvREFCNT(sv)); return sv; } void Perl_sv_free(pTHX_ SV *sv) { int refcount_is_zero; if (!sv) return; if (SvREFCNT(sv) == 0) { if (SvFLAGS(sv) & SVf_BREAK) return; if (PL_in_clean_all) /* All is fair */ return; if (SvREADONLY(sv) && SvIMMORTAL(sv)) { /* make sure SvREFCNT(sv)==0 happens very seldom */ SvREFCNT(sv) = (~(U32)0)/2; return; } Perl_warn(aTHX_ "Attempt to free unreferenced scalar"); return; } ATOMIC_DEC_AND_TEST(refcount_is_zero, SvREFCNT(sv)); if (!refcount_is_zero) return; #ifdef DEBUGGING if (SvTEMP(sv)) { Perl_warn(aTHX_ "Attempt to free temp prematurely: SV 0x%lx", (unsigned long)sv); return; } #endif if (SvREADONLY(sv) && SvIMMORTAL(sv)) { /* make sure SvREFCNT(sv)==0 happens very seldom */ SvREFCNT(sv) = (~(U32)0)/2; return; } sv_clear(sv); if (! SvREFCNT(sv)) del_SV(sv); } STRLEN Perl_sv_len(pTHX_ register SV *sv) { char *junk; STRLEN len; if (!sv) return 0; if (SvGMAGICAL(sv)) len = mg_length(sv); else junk = SvPV(sv, len); return len; } STRLEN Perl_sv_len_utf8(pTHX_ register SV *sv) { U8 *s; U8 *send; STRLEN len; if (!sv) return 0; #ifdef NOTYET if (SvGMAGICAL(sv)) len = mg_length(sv); else #endif s = (U8*)SvPV(sv, len); send = s + len; len = 0; while (s < send) { s += UTF8SKIP(s); len++; } return len; } void Perl_sv_pos_u2b(pTHX_ register SV *sv, I32* offsetp, I32* lenp) { U8 *start; U8 *s; U8 *send; I32 uoffset = *offsetp; STRLEN len; if (!sv) return; start = s = (U8*)SvPV(sv, len); send = s + len; while (s < send && uoffset--) s += UTF8SKIP(s); if (s >= send) s = send; *offsetp = s - start; if (lenp) { I32 ulen = *lenp; start = s; while (s < send && ulen--) s += UTF8SKIP(s); if (s >= send) s = send; *lenp = s - start; } return; } void Perl_sv_pos_b2u(pTHX_ register SV *sv, I32* offsetp) { U8 *s; U8 *send; STRLEN len; if (!sv) return; s = (U8*)SvPV(sv, len); if (len < *offsetp) Perl_croak(aTHX_ "panic: bad byte offset"); send = s + *offsetp; len = 0; while (s < send) { s += UTF8SKIP(s); ++len; } if (s != send) { Perl_warn(aTHX_ "Malformed UTF-8 character"); --len; } *offsetp = len; return; } I32 Perl_sv_eq(pTHX_ register SV *str1, register SV *str2) { char *pv1; STRLEN cur1; char *pv2; STRLEN cur2; if (!str1) { pv1 = ""; cur1 = 0; } else pv1 = SvPV(str1, cur1); if (!str2) return !cur1; else pv2 = SvPV(str2, cur2); if (cur1 != cur2) return 0; return memEQ(pv1, pv2, cur1); } I32 Perl_sv_cmp(pTHX_ register SV *str1, register SV *str2) { STRLEN cur1 = 0; char *pv1 = str1 ? SvPV(str1, cur1) : (char *) NULL; STRLEN cur2 = 0; char *pv2 = str2 ? SvPV(str2, cur2) : (char *) NULL; I32 retval; if (!cur1) return cur2 ? -1 : 0; if (!cur2) return 1; retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2); if (retval) return retval < 0 ? -1 : 1; if (cur1 == cur2) return 0; else return cur1 < cur2 ? -1 : 1; } I32 Perl_sv_cmp_locale(pTHX_ register SV *sv1, register SV *sv2) { #ifdef USE_LOCALE_COLLATE char *pv1, *pv2; STRLEN len1, len2; I32 retval; if (PL_collation_standard) goto raw_compare; len1 = 0; pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL; len2 = 0; pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL; if (!pv1 || !len1) { if (pv2 && len2) return -1; else goto raw_compare; } else { if (!pv2 || !len2) return 1; } retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2); if (retval) return retval < 0 ? -1 : 1; /* * When the result of collation is equality, that doesn't mean * that there are no differences -- some locales exclude some * characters from consideration. So to avoid false equalities, * we use the raw string as a tiebreaker. */ raw_compare: /* FALL THROUGH */ #endif /* USE_LOCALE_COLLATE */ return sv_cmp(sv1, sv2); } #ifdef USE_LOCALE_COLLATE /* * Any scalar variable may carry an 'o' magic that contains the * scalar data of the variable transformed to such a format that * a normal memory comparison can be used to compare the data * according to the locale settings. */ char * Perl_sv_collxfrm(pTHX_ SV *sv, STRLEN *nxp) { MAGIC *mg; mg = SvMAGICAL(sv) ? mg_find(sv, 'o') : (MAGIC *) NULL; if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) { char *s, *xf; STRLEN len, xlen; if (mg) Safefree(mg->mg_ptr); s = SvPV(sv, len); if ((xf = mem_collxfrm(s, len, &xlen))) { if (SvREADONLY(sv)) { SAVEFREEPV(xf); *nxp = xlen; return xf + sizeof(PL_collation_ix); } if (! mg) { sv_magic(sv, 0, 'o', 0, 0); mg = mg_find(sv, 'o'); assert(mg); } mg->mg_ptr = xf; mg->mg_len = xlen; } else { if (mg) { mg->mg_ptr = NULL; mg->mg_len = -1; } } } if (mg && mg->mg_ptr) { *nxp = mg->mg_len; return mg->mg_ptr + sizeof(PL_collation_ix); } else { *nxp = 0; return NULL; } } #endif /* USE_LOCALE_COLLATE */ char * Perl_sv_gets(pTHX_ register SV *sv, register PerlIO *fp, I32 append) { dTHR; char *rsptr; STRLEN rslen; register STDCHAR rslast; register STDCHAR *bp; register I32 cnt; I32 i; SV_CHECK_THINKFIRST(sv); (void)SvUPGRADE(sv, SVt_PV); SvSCREAM_off(sv); if (RsSNARF(PL_rs)) { rsptr = NULL; rslen = 0; } else if (RsRECORD(PL_rs)) { I32 recsize, bytesread; char *buffer; /* Grab the size of the record we're getting */ recsize = SvIV(SvRV(PL_rs)); (void)SvPOK_only(sv); /* Validate pointer */ buffer = SvGROW(sv, recsize + 1); /* Go yank in */ #ifdef VMS /* VMS wants read instead of fread, because fread doesn't respect */ /* RMS record boundaries. This is not necessarily a good thing to be */ /* doing, but we've got no other real choice */ bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize); #else bytesread = PerlIO_read(fp, buffer, recsize); #endif SvCUR_set(sv, bytesread); buffer[bytesread] = '\0'; return(SvCUR(sv) ? SvPVX(sv) : Nullch); } else if (RsPARA(PL_rs)) { rsptr = "\n\n"; rslen = 2; } else rsptr = SvPV(PL_rs, rslen); rslast = rslen ? rsptr[rslen - 1] : '\0'; if (RsPARA(PL_rs)) { /* have to do this both before and after */ do { /* to make sure file boundaries work right */ if (PerlIO_eof(fp)) return 0; i = PerlIO_getc(fp); if (i != '\n') { if (i == -1) return 0; PerlIO_ungetc(fp,i); break; } } while (i != EOF); } /* See if we know enough about I/O mechanism to cheat it ! */ /* This used to be #ifdef test - it is made run-time test for ease of abstracting out stdio interface. One call should be cheap enough here - and may even be a macro allowing compile time optimization. */ if (PerlIO_fast_gets(fp)) { /* * We're going to steal some values from the stdio struct * and put EVERYTHING in the innermost loop into registers. */ register STDCHAR *ptr; STRLEN bpx; I32 shortbuffered; #if defined(VMS) && defined(PERLIO_IS_STDIO) /* An ungetc()d char is handled separately from the regular * buffer, so we getc() it back out and stuff it in the buffer. */ i = PerlIO_getc(fp); if (i == EOF) return 0; *(--((*fp)->_ptr)) = (unsigned char) i; (*fp)->_cnt++; #endif /* Here is some breathtakingly efficient cheating */ cnt = PerlIO_get_cnt(fp); /* get count into register */ (void)SvPOK_only(sv); /* validate pointer */ if (SvLEN(sv) - append <= cnt + 1) { /* make sure we have the room */ if (cnt > 80 && SvLEN(sv) > append) { shortbuffered = cnt - SvLEN(sv) + append + 1; cnt -= shortbuffered; } else { shortbuffered = 0; /* remember that cnt can be negative */ SvGROW(sv, append + (cnt <= 0 ? 2 : (cnt + 1))); } } else shortbuffered = 0; bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */ ptr = (STDCHAR*)PerlIO_get_ptr(fp); DEBUG_P(PerlIO_printf(Perl_debug_log, "Screamer: entering, ptr=%ld, cnt=%ld\n",(long)ptr,(long)cnt)); DEBUG_P(PerlIO_printf(Perl_debug_log, "Screamer: entering: FILE * thinks ptr=%ld, cnt=%ld, base=%ld\n", (long)PerlIO_get_ptr(fp), (long)PerlIO_get_cnt(fp), (long)(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0))); for (;;) { screamer: if (cnt > 0) { if (rslen) { while (cnt > 0) { /* this | eat */ cnt--; if ((*bp++ = *ptr++) == rslast) /* really | dust */ goto thats_all_folks; /* screams | sed :-) */ } } else { Copy(ptr, bp, cnt, char); /* this | eat */ bp += cnt; /* screams | dust */ ptr += cnt; /* louder | sed :-) */ cnt = 0; } } if (shortbuffered) { /* oh well, must extend */ cnt = shortbuffered; shortbuffered = 0; bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */ SvCUR_set(sv, bpx); SvGROW(sv, SvLEN(sv) + append + cnt + 2); bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */ continue; } DEBUG_P(PerlIO_printf(Perl_debug_log, "Screamer: going to getc, ptr=%ld, cnt=%ld\n",(long)ptr,(long)cnt)); PerlIO_set_ptrcnt(fp, ptr, cnt); /* deregisterize cnt and ptr */ DEBUG_P(PerlIO_printf(Perl_debug_log, "Screamer: pre: FILE * thinks ptr=%ld, cnt=%ld, base=%ld\n", (long)PerlIO_get_ptr(fp), (long)PerlIO_get_cnt(fp), (long)(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0))); /* This used to call 'filbuf' in stdio form, but as that behaves like getc when cnt <= 0 we use PerlIO_getc here to avoid introducing another abstraction. */ i = PerlIO_getc(fp); /* get more characters */ DEBUG_P(PerlIO_printf(Perl_debug_log, "Screamer: post: FILE * thinks ptr=%ld, cnt=%ld, base=%ld\n", (long)PerlIO_get_ptr(fp), (long)PerlIO_get_cnt(fp), (long)(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0))); cnt = PerlIO_get_cnt(fp); ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */ DEBUG_P(PerlIO_printf(Perl_debug_log, "Screamer: after getc, ptr=%ld, cnt=%ld\n",(long)ptr,(long)cnt)); if (i == EOF) /* all done for ever? */ goto thats_really_all_folks; bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */ SvCUR_set(sv, bpx); SvGROW(sv, bpx + cnt + 2); bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */ *bp++ = i; /* store character from PerlIO_getc */ if (rslen && (STDCHAR)i == rslast) /* all done for now? */ goto thats_all_folks; } thats_all_folks: if ((rslen > 1 && (bp - (STDCHAR*)SvPVX(sv) < rslen)) || memNE((char*)bp - rslen, rsptr, rslen)) goto screamer; /* go back to the fray */ thats_really_all_folks: if (shortbuffered) cnt += shortbuffered; DEBUG_P(PerlIO_printf(Perl_debug_log, "Screamer: quitting, ptr=%ld, cnt=%ld\n",(long)ptr,(long)cnt)); PerlIO_set_ptrcnt(fp, ptr, cnt); /* put these back or we're in trouble */ DEBUG_P(PerlIO_printf(Perl_debug_log, "Screamer: end: FILE * thinks ptr=%ld, cnt=%ld, base=%ld\n", (long)PerlIO_get_ptr(fp), (long)PerlIO_get_cnt(fp), (long)(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0))); *bp = '\0'; SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */ DEBUG_P(PerlIO_printf(Perl_debug_log, "Screamer: done, len=%ld, string=|%.*s|\n", (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv))); } else { /*The big, slow, and stupid way */ STDCHAR buf[8192]; screamer2: if (rslen) { register STDCHAR *bpe = buf + sizeof(buf); bp = buf; while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = i) != rslast && bp < bpe) ; /* keep reading */ cnt = bp - buf; } else { cnt = PerlIO_read(fp,(char*)buf, sizeof(buf)); /* Accomodate broken VAXC compiler, which applies U8 cast to * both args of ?: operator, causing EOF to change into 255 */ if (cnt) { i = (U8)buf[cnt - 1]; } else { i = EOF; } } if (append) sv_catpvn(sv, (char *) buf, cnt); else sv_setpvn(sv, (char *) buf, cnt); if (i != EOF && /* joy */ (!rslen || SvCUR(sv) < rslen || memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen))) { append = -1; /* * If we're reading from a TTY and we get a short read, * indicating that the user hit his EOF character, we need * to notice it now, because if we try to read from the TTY * again, the EOF condition will disappear. * * The comparison of cnt to sizeof(buf) is an optimization * that prevents unnecessary calls to feof(). * * - jik 9/25/96 */ if (!(cnt < sizeof(buf) && PerlIO_eof(fp))) goto screamer2; } } if (RsPARA(PL_rs)) { /* have to do this both before and after */ while (i != EOF) { /* to make sure file boundaries work right */ i = PerlIO_getc(fp); if (i != '\n') { PerlIO_ungetc(fp,i); break; } } } #ifdef WIN32 win32_strip_return(sv); #endif return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch; } void Perl_sv_inc(pTHX_ register SV *sv) { register char *d; int flags; if (!sv) return; if (SvGMAGICAL(sv)) mg_get(sv); if (SvTHINKFIRST(sv)) { if (SvREADONLY(sv)) { dTHR; if (PL_curcop != &PL_compiling) Perl_croak(aTHX_ PL_no_modify); } if (SvROK(sv)) { IV i; if (SvAMAGIC(sv) && AMG_CALLun(sv,inc)) return; i = (IV)SvRV(sv); sv_unref(sv); sv_setiv(sv, i); } } flags = SvFLAGS(sv); if (flags & SVp_NOK) { (void)SvNOK_only(sv); SvNVX(sv) += 1.0; return; } if (flags & SVp_IOK) { if (SvIsUV(sv)) { if (SvUVX(sv) == UV_MAX) sv_setnv(sv, (double)UV_MAX + 1.0); else (void)SvIOK_only_UV(sv); ++SvUVX(sv); } else { if (SvIVX(sv) == IV_MAX) sv_setnv(sv, (double)IV_MAX + 1.0); else { (void)SvIOK_only(sv); ++SvIVX(sv); } } return; } if (!(flags & SVp_POK) || !*SvPVX(sv)) { if ((flags & SVTYPEMASK) < SVt_PVNV) sv_upgrade(sv, SVt_NV); SvNVX(sv) = 1.0; (void)SvNOK_only(sv); return; } d = SvPVX(sv); while (isALPHA(*d)) d++; while (isDIGIT(*d)) d++; if (*d) { SET_NUMERIC_STANDARD(); sv_setnv(sv,atof(SvPVX(sv)) + 1.0); /* punt */ return; } d--; while (d >= SvPVX(sv)) { if (isDIGIT(*d)) { if (++*d <= '9') return; *(d--) = '0'; } else { #ifdef EBCDIC /* MKS: The original code here died if letters weren't consecutive. * at least it didn't have to worry about non-C locales. The * new code assumes that ('z'-'a')==('Z'-'A'), letters are * arranged in order (although not consecutively) and that only * [A-Za-z] are accepted by isALPHA in the C locale. */ if (*d != 'z' && *d != 'Z') { do { ++*d; } while (!isALPHA(*d)); return; } *(d--) -= 'z' - 'a'; #else ++*d; if (isALPHA(*d)) return; *(d--) -= 'z' - 'a' + 1; #endif } } /* oh,oh, the number grew */ SvGROW(sv, SvCUR(sv) + 2); SvCUR(sv)++; for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--) *d = d[-1]; if (isDIGIT(d[1])) *d = '1'; else *d = d[1]; } void Perl_sv_dec(pTHX_ register SV *sv) { int flags; if (!sv) return; if (SvGMAGICAL(sv)) mg_get(sv); if (SvTHINKFIRST(sv)) { if (SvREADONLY(sv)) { dTHR; if (PL_curcop != &PL_compiling) Perl_croak(aTHX_ PL_no_modify); } if (SvROK(sv)) { IV i; if (SvAMAGIC(sv) && AMG_CALLun(sv,dec)) return; i = (IV)SvRV(sv); sv_unref(sv); sv_setiv(sv, i); } } flags = SvFLAGS(sv); if (flags & SVp_NOK) { SvNVX(sv) -= 1.0; (void)SvNOK_only(sv); return; } if (flags & SVp_IOK) { if (SvIsUV(sv)) { if (SvUVX(sv) == 0) { (void)SvIOK_only(sv); SvIVX(sv) = -1; } else { (void)SvIOK_only_UV(sv); --SvUVX(sv); } } else { if (SvIVX(sv) == IV_MIN) sv_setnv(sv, (double)IV_MIN - 1.0); else { (void)SvIOK_only(sv); --SvIVX(sv); } } return; } if (!(flags & SVp_POK)) { if ((flags & SVTYPEMASK) < SVt_PVNV) sv_upgrade(sv, SVt_NV); SvNVX(sv) = -1.0; (void)SvNOK_only(sv); return; } SET_NUMERIC_STANDARD(); sv_setnv(sv,atof(SvPVX(sv)) - 1.0); /* punt */ } /* Make a string that will exist for the duration of the expression * evaluation. Actually, it may have to last longer than that, but * hopefully we won't free it until it has been assigned to a * permanent location. */ SV * Perl_sv_mortalcopy(pTHX_ SV *oldstr) { dTHR; register SV *sv; new_SV(sv); sv_setsv(sv,oldstr); EXTEND_MORTAL(1); PL_tmps_stack[++PL_tmps_ix] = sv; SvTEMP_on(sv); return sv; } SV * Perl_sv_newmortal(pTHX) { dTHR; register SV *sv; new_SV(sv); SvFLAGS(sv) = SVs_TEMP; EXTEND_MORTAL(1); PL_tmps_stack[++PL_tmps_ix] = sv; return sv; } /* same thing without the copying */ SV * Perl_sv_2mortal(pTHX_ register SV *sv) { dTHR; if (!sv) return sv; if (SvREADONLY(sv) && SvIMMORTAL(sv)) return sv; EXTEND_MORTAL(1); PL_tmps_stack[++PL_tmps_ix] = sv; SvTEMP_on(sv); return sv; } SV * Perl_newSVpv(pTHX_ const char *s, STRLEN len) { register SV *sv; new_SV(sv); if (!len) len = strlen(s); sv_setpvn(sv,s,len); return sv; } SV * Perl_newSVpvn(pTHX_ const char *s, STRLEN len) { register SV *sv; new_SV(sv); sv_setpvn(sv,s,len); return sv; } #if defined(PERL_IMPLICIT_CONTEXT) SV * Perl_newSVpvf_nocontext(const char* pat, ...) { dTHX; register SV *sv; va_list args; new_SV(sv); va_start(args, pat); sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*)); va_end(args); return sv; } #endif SV * Perl_newSVpvf(pTHX_ const char* pat, ...) { register SV *sv; va_list args; new_SV(sv); va_start(args, pat); sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*)); va_end(args); return sv; } SV * Perl_newSVnv(pTHX_ double n) { register SV *sv; new_SV(sv); sv_setnv(sv,n); return sv; } SV * Perl_newSViv(pTHX_ IV i) { register SV *sv; new_SV(sv); sv_setiv(sv,i); return sv; } SV * Perl_newRV_noinc(pTHX_ SV *tmpRef) { dTHR; register SV *sv; new_SV(sv); sv_upgrade(sv, SVt_RV); SvTEMP_off(tmpRef); SvRV(sv) = tmpRef; SvROK_on(sv); return sv; } SV * Perl_newRV(pTHX_ SV *tmpRef) { return newRV_noinc(SvREFCNT_inc(tmpRef)); } /* make an exact duplicate of old */ SV * Perl_newSVsv(pTHX_ register SV *old) { register SV *sv; if (!old) return Nullsv; if (SvTYPE(old) == SVTYPEMASK) { Perl_warn(aTHX_ "semi-panic: attempt to dup freed string"); return Nullsv; } new_SV(sv); if (SvTEMP(old)) { SvTEMP_off(old); sv_setsv(sv,old); SvTEMP_on(old); } else sv_setsv(sv,old); return sv; } void Perl_sv_reset(pTHX_ register char *s, HV *stash) { register HE *entry; register GV *gv; register SV *sv; register I32 i; register PMOP *pm; register I32 max; char todo[256]; if (!stash) return; if (!*s) { /* reset ?? searches */ for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) { pm->op_pmdynflags &= ~PMdf_USED; } return; } /* reset variables */ if (!HvARRAY(stash)) return; Zero(todo, 256, char); while (*s) { i = *s; if (s[1] == '-') { s += 2; } max = *s++; for ( ; i <= max; i++) { todo[i] = 1; } for (i = 0; i <= (I32) HvMAX(stash); i++) { for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { if (!todo[(U8)*HeKEY(entry)]) continue; gv = (GV*)HeVAL(entry); sv = GvSV(gv); if (SvTHINKFIRST(sv)) { if (!SvREADONLY(sv) && SvROK(sv)) sv_unref(sv); continue; } (void)SvOK_off(sv); if (SvTYPE(sv) >= SVt_PV) { SvCUR_set(sv, 0); if (SvPVX(sv) != Nullch) *SvPVX(sv) = '\0'; SvTAINT(sv); } if (GvAV(gv)) { av_clear(GvAV(gv)); } if (GvHV(gv) && !HvNAME(GvHV(gv))) { hv_clear(GvHV(gv)); #ifndef VMS /* VMS has no environ array */ if (gv == PL_envgv) environ[0] = Nullch; #endif } } } } } IO* Perl_sv_2io(pTHX_ SV *sv) { IO* io; GV* gv; STRLEN n_a; switch (SvTYPE(sv)) { case SVt_PVIO: io = (IO*)sv; break; case SVt_PVGV: gv = (GV*)sv; io = GvIO(gv); if (!io) Perl_croak(aTHX_ "Bad filehandle: %s", GvNAME(gv)); break; default: if (!SvOK(sv)) Perl_croak(aTHX_ PL_no_usym, "filehandle"); if (SvROK(sv)) return sv_2io(SvRV(sv)); gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO); if (gv) io = GvIO(gv); else io = 0; if (!io) Perl_croak(aTHX_ "Bad filehandle: %s", SvPV(sv,n_a)); break; } return io; } CV * Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref) { GV *gv; CV *cv; STRLEN n_a; if (!sv) return *gvp = Nullgv, Nullcv; switch (SvTYPE(sv)) { case SVt_PVCV: *st = CvSTASH(sv); *gvp = Nullgv; return (CV*)sv; case SVt_PVHV: case SVt_PVAV: *gvp = Nullgv; return Nullcv; case SVt_PVGV: gv = (GV*)sv; *gvp = gv; *st = GvESTASH(gv); goto fix_gv; default: if (SvGMAGICAL(sv)) mg_get(sv); if (SvROK(sv)) { dTHR; SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */ tryAMAGICunDEREF(to_cv); sv = SvRV(sv); if (SvTYPE(sv) == SVt_PVCV) { cv = (CV*)sv; *gvp = Nullgv; *st = CvSTASH(cv); return cv; } else if(isGV(sv)) gv = (GV*)sv; else Perl_croak(aTHX_ "Not a subroutine reference"); } else if (isGV(sv)) gv = (GV*)sv; else gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV); *gvp = gv; if (!gv) return Nullcv; *st = GvESTASH(gv); fix_gv: if (lref && !GvCVu(gv)) { SV *tmpsv; ENTER; tmpsv = NEWSV(704,0); gv_efullname3(tmpsv, gv, Nullch); /* XXX this is probably not what they think they're getting. * It has the same effect as "sub name;", i.e. just a forward * declaration! */ newSUB(start_subparse(FALSE, 0), newSVOP(OP_CONST, 0, tmpsv), Nullop, Nullop); LEAVE; if (!GvCVu(gv)) Perl_croak(aTHX_ "Unable to create sub named \"%s\"", SvPV(sv,n_a)); } return GvCVu(gv); } } I32 Perl_sv_true(pTHX_ register SV *sv) { dTHR; if (!sv) return 0; if (SvPOK(sv)) { register XPV* tXpv; if ((tXpv = (XPV*)SvANY(sv)) && (*tXpv->xpv_pv > '0' || tXpv->xpv_cur > 1 || (tXpv->xpv_cur && *tXpv->xpv_pv != '0'))) return 1; else return 0; } else { if (SvIOK(sv)) return SvIVX(sv) != 0; else { if (SvNOK(sv)) return SvNVX(sv) != 0.0; else return sv_2bool(sv); } } } IV Perl_sv_iv(pTHX_ register SV *sv) { if (SvIOK(sv)) { if (SvIsUV(sv)) return (IV)SvUVX(sv); return SvIVX(sv); } return sv_2iv(sv); } UV Perl_sv_uv(pTHX_ register SV *sv) { if (SvIOK(sv)) { if (SvIsUV(sv)) return SvUVX(sv); return (UV)SvIVX(sv); } return sv_2uv(sv); } double Perl_sv_nv(pTHX_ register SV *sv) { if (SvNOK(sv)) return SvNVX(sv); return sv_2nv(sv); } char * Perl_sv_pv(pTHX_ SV *sv) { STRLEN n_a; if (SvPOK(sv)) return SvPVX(sv); return sv_2pv(sv, &n_a); } char * Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp) { if (SvPOK(sv)) { *lp = SvCUR(sv); return SvPVX(sv); } return sv_2pv(sv, lp); } char * Perl_sv_pvn_force(pTHX_ SV *sv, STRLEN *lp) { char *s; if (SvTHINKFIRST(sv) && !SvROK(sv)) sv_force_normal(sv); if (SvPOK(sv)) { *lp = SvCUR(sv); } else { if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) { dTHR; Perl_croak(aTHX_ "Can't coerce %s to string in %s", sv_reftype(sv,0), PL_op_name[PL_op->op_type]); } else s = sv_2pv(sv, lp); if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */ STRLEN len = *lp; if (SvROK(sv)) sv_unref(sv); (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */ SvGROW(sv, len + 1); Move(s,SvPVX(sv),len,char); SvCUR_set(sv, len); *SvEND(sv) = '\0'; } if (!SvPOK(sv)) { SvPOK_on(sv); /* validate pointer */ SvTAINT(sv); DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%lx 2pv(%s)\n", (unsigned long)sv,SvPVX(sv))); } } return SvPVX(sv); } char * Perl_sv_reftype(pTHX_ SV *sv, int ob) { if (ob && SvOBJECT(sv)) return HvNAME(SvSTASH(sv)); else { switch (SvTYPE(sv)) { case SVt_NULL: case SVt_IV: case SVt_NV: case SVt_RV: case SVt_PV: case SVt_PVIV: case SVt_PVNV: case SVt_PVMG: case SVt_PVBM: if (SvROK(sv)) return "REF"; else return "SCALAR"; case SVt_PVLV: return "LVALUE"; case SVt_PVAV: return "ARRAY"; case SVt_PVHV: return "HASH"; case SVt_PVCV: return "CODE"; case SVt_PVGV: return "GLOB"; case SVt_PVFM: return "FORMAT"; default: return "UNKNOWN"; } } } int Perl_sv_isobject(pTHX_ SV *sv) { if (!sv) return 0; if (SvGMAGICAL(sv)) mg_get(sv); if (!SvROK(sv)) return 0; sv = (SV*)SvRV(sv); if (!SvOBJECT(sv)) return 0; return 1; } int Perl_sv_isa(pTHX_ SV *sv, const char *name) { if (!sv) return 0; if (SvGMAGICAL(sv)) mg_get(sv); if (!SvROK(sv)) return 0; sv = (SV*)SvRV(sv); if (!SvOBJECT(sv)) return 0; return strEQ(HvNAME(SvSTASH(sv)), name); } SV* Perl_newSVrv(pTHX_ SV *rv, const char *classname) { dTHR; SV *sv; new_SV(sv); SV_CHECK_THINKFIRST(rv); SvAMAGIC_off(rv); if (SvTYPE(rv) < SVt_RV) sv_upgrade(rv, SVt_RV); (void)SvOK_off(rv); SvRV(rv) = sv; SvROK_on(rv); if (classname) { HV* stash = gv_stashpv(classname, TRUE); (void)sv_bless(rv, stash); } return sv; } SV* Perl_sv_setref_pv(pTHX_ SV *rv, const char *classname, void *pv) { if (!pv) { sv_setsv(rv, &PL_sv_undef); SvSETMAGIC(rv); } else sv_setiv(newSVrv(rv,classname), (IV)pv); return rv; } SV* Perl_sv_setref_iv(pTHX_ SV *rv, const char *classname, IV iv) { sv_setiv(newSVrv(rv,classname), iv); return rv; } SV* Perl_sv_setref_nv(pTHX_ SV *rv, const char *classname, double nv) { sv_setnv(newSVrv(rv,classname), nv); return rv; } SV* Perl_sv_setref_pvn(pTHX_ SV *rv, const char *classname, char *pv, STRLEN n) { sv_setpvn(newSVrv(rv,classname), pv, n); return rv; } SV* Perl_sv_bless(pTHX_ SV *sv, HV *stash) { dTHR; SV *tmpRef; if (!SvROK(sv)) Perl_croak(aTHX_ "Can't bless non-reference value"); tmpRef = SvRV(sv); if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) { if (SvREADONLY(tmpRef)) Perl_croak(aTHX_ PL_no_modify); if (SvOBJECT(tmpRef)) { if (SvTYPE(tmpRef) != SVt_PVIO) --PL_sv_objcount; SvREFCNT_dec(SvSTASH(tmpRef)); } } SvOBJECT_on(tmpRef); if (SvTYPE(tmpRef) != SVt_PVIO) ++PL_sv_objcount; (void)SvUPGRADE(tmpRef, SVt_PVMG); SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash); if (Gv_AMG(stash)) SvAMAGIC_on(sv); else SvAMAGIC_off(sv); return sv; } STATIC void S_sv_unglob(pTHX_ SV *sv) { assert(SvTYPE(sv) == SVt_PVGV); SvFAKE_off(sv); if (GvGP(sv)) gp_free((GV*)sv); if (GvSTASH(sv)) { SvREFCNT_dec(GvSTASH(sv)); GvSTASH(sv) = Nullhv; } sv_unmagic(sv, '*'); Safefree(GvNAME(sv)); GvMULTI_off(sv); SvFLAGS(sv) &= ~SVTYPEMASK; SvFLAGS(sv) |= SVt_PVMG; } void Perl_sv_unref(pTHX_ SV *sv) { SV* rv = SvRV(sv); if (SvWEAKREF(sv)) { sv_del_backref(sv); SvWEAKREF_off(sv); SvRV(sv) = 0; return; } SvRV(sv) = 0; SvROK_off(sv); if (SvREFCNT(rv) != 1 || SvREADONLY(rv)) SvREFCNT_dec(rv); else sv_2mortal(rv); /* Schedule for freeing later */ } void Perl_sv_taint(pTHX_ SV *sv) { sv_magic((sv), Nullsv, 't', Nullch, 0); } void Perl_sv_untaint(pTHX_ SV *sv) { if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { MAGIC *mg = mg_find(sv, 't'); if (mg) mg->mg_len &= ~1; } } bool Perl_sv_tainted(pTHX_ SV *sv) { if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) { MAGIC *mg = mg_find(sv, 't'); if (mg && ((mg->mg_len & 1) || (mg->mg_len & 2) && mg->mg_obj == sv)) return TRUE; } return FALSE; } void Perl_sv_setpviv(pTHX_ SV *sv, IV iv) { char buf[TYPE_CHARS(UV)]; char *ebuf; char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf); sv_setpvn(sv, ptr, ebuf - ptr); } void Perl_sv_setpviv_mg(pTHX_ SV *sv, IV iv) { char buf[TYPE_CHARS(UV)]; char *ebuf; char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf); sv_setpvn(sv, ptr, ebuf - ptr); SvSETMAGIC(sv); } #if defined(PERL_IMPLICIT_CONTEXT) void Perl_sv_setpvf_nocontext(SV *sv, const char* pat, ...) { dTHX; va_list args; va_start(args, pat); sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*)); va_end(args); } void Perl_sv_setpvf_mg_nocontext(SV *sv, const char* pat, ...) { dTHX; va_list args; va_start(args, pat); sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*)); va_end(args); SvSETMAGIC(sv); } #endif void Perl_sv_setpvf(pTHX_ SV *sv, const char* pat, ...) { va_list args; va_start(args, pat); sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*)); va_end(args); } void Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...) { va_list args; va_start(args, pat); sv_vsetpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*)); va_end(args); SvSETMAGIC(sv); } #if defined(PERL_IMPLICIT_CONTEXT) void Perl_sv_catpvf_nocontext(SV *sv, const char* pat, ...) { dTHX; va_list args; va_start(args, pat); sv_vcatpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*)); va_end(args); } void Perl_sv_catpvf_mg_nocontext(SV *sv, const char* pat, ...) { dTHX; va_list args; va_start(args, pat); sv_vcatpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*)); va_end(args); SvSETMAGIC(sv); } #endif void Perl_sv_catpvf(pTHX_ SV *sv, const char* pat, ...) { va_list args; va_start(args, pat); sv_vcatpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*)); va_end(args); } void Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...) { va_list args; va_start(args, pat); sv_vcatpvfn(sv, pat, strlen(pat), &args, Null(SV**), 0, Null(bool*)); va_end(args); SvSETMAGIC(sv); } void Perl_sv_vsetpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *used_locale) { sv_setpvn(sv, "", 0); sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, used_locale); } void Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *used_locale) { dTHR; char *p; char *q; char *patend; STRLEN origlen; I32 svix = 0; static char nullstr[] = "(null)"; /* no matter what, this is a string now */ (void)SvPV_force(sv, origlen); /* special-case "", "%s", and "%_" */ if (patlen == 0) return; if (patlen == 2 && pat[0] == '%') { switch (pat[1]) { case 's': if (args) { char *s = va_arg(*args, char*); sv_catpv(sv, s ? s : nullstr); } else if (svix < svmax) sv_catsv(sv, *svargs); return; case '_': if (args) { sv_catsv(sv, va_arg(*args, SV*)); return; } /* See comment on '_' below */ break; } } patend = (char*)pat + patlen; for (p = (char*)pat; p < patend; p = q) { bool alt = FALSE; bool left = FALSE; char fill = ' '; char plus = 0; char intsize = 0; STRLEN width = 0; STRLEN zeros = 0; bool has_precis = FALSE; STRLEN precis = 0; char esignbuf[4]; U8 utf8buf[10]; STRLEN esignlen = 0; char *eptr = Nullch; STRLEN elen = 0; char ebuf[TYPE_DIGITS(int) * 2 + 16]; /* large enough for "%#.#f" */ char c; int i; unsigned base; IV iv; UV uv; double nv; STRLEN have; STRLEN need; STRLEN gap; for (q = p; q < patend && *q != '%'; ++q) ; if (q > p) { sv_catpvn(sv, p, q - p); p = q; } if (q++ >= patend) break; /* FLAGS */ while (*q) { switch (*q) { case ' ': case '+': plus = *q++; continue; case '-': left = TRUE; q++; continue; case '0': fill = *q++; continue; case '#': alt = TRUE; q++; continue; default: break; } break; } /* WIDTH */ switch (*q) { case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': width = 0; while (isDIGIT(*q)) width = width * 10 + (*q++ - '0'); break; case '*': if (args) i = va_arg(*args, int); else i = (svix < svmax) ? SvIVx(svargs[svix++]) : 0; left |= (i < 0); width = (i < 0) ? -i : i; q++; break; } /* PRECISION */ if (*q == '.') { q++; if (*q == '*') { if (args) i = va_arg(*args, int); else i = (svix < svmax) ? SvIVx(svargs[svix++]) : 0; precis = (i < 0) ? 0 : i; q++; } else { precis = 0; while (isDIGIT(*q)) precis = precis * 10 + (*q++ - '0'); } has_precis = TRUE; } /* SIZE */ switch (*q) { case 'l': #if 0 /* when quads have better support within Perl */ if (*(q + 1) == 'l') { intsize = 'q'; q += 2; break; } #endif /* FALL THROUGH */ case 'h': case 'V': intsize = *q++; break; } /* CONVERSION */ switch (c = *q++) { /* STRINGS */ case '%': eptr = q - 1; elen = 1; goto string; case 'c': if (IN_UTF8) { if (args) uv = va_arg(*args, int); else uv = (svix < svmax) ? SvIVx(svargs[svix++]) : 0; eptr = (char*)utf8buf; elen = uv_to_utf8((U8*)eptr, uv) - utf8buf; goto string; } if (args) c = va_arg(*args, int); else c = (svix < svmax) ? SvIVx(svargs[svix++]) : 0; eptr = &c; elen = 1; goto string; case 's': if (args) { eptr = va_arg(*args, char*); if (eptr) elen = strlen(eptr); else { eptr = nullstr; elen = sizeof nullstr - 1; } } else if (svix < svmax) { eptr = SvPVx(svargs[svix++], elen); if (IN_UTF8) { if (has_precis && precis < elen) { I32 p = precis; sv_pos_u2b(svargs[svix - 1], &p, 0); /* sticks at end */ precis = p; } if (width) { /* fudge width (can't fudge elen) */ width += elen - sv_len_utf8(svargs[svix - 1]); } } } goto string; case '_': /* * The "%_" hack might have to be changed someday, * if ISO or ANSI decide to use '_' for something. * So we keep it hidden from users' code. */ if (!args) goto unknown; eptr = SvPVx(va_arg(*args, SV*), elen); string: if (has_precis && elen > precis) elen = precis; break; /* INTEGERS */ case 'p': if (args) uv = (UV)va_arg(*args, void*); else uv = (svix < svmax) ? (UV)svargs[svix++] : 0; base = 16; goto integer; case 'D': intsize = 'l'; /* FALL THROUGH */ case 'd': case 'i': if (args) { switch (intsize) { case 'h': iv = (short)va_arg(*args, int); break; default: iv = va_arg(*args, int); break; case 'l': iv = va_arg(*args, long); break; case 'V': iv = va_arg(*args, IV); break; } } else { iv = (svix < svmax) ? SvIVx(svargs[svix++]) : 0; switch (intsize) { case 'h': iv = (short)iv; break; default: iv = (int)iv; break; case 'l': iv = (long)iv; break; case 'V': break; } } if (iv >= 0) { uv = iv; if (plus) esignbuf[esignlen++] = plus; } else { uv = -iv; esignbuf[esignlen++] = '-'; } base = 10; goto integer; case 'U': intsize = 'l'; /* FALL THROUGH */ case 'u': base = 10; goto uns_integer; case 'b': base = 2; goto uns_integer; case 'O': intsize = 'l'; /* FALL THROUGH */ case 'o': base = 8; goto uns_integer; case 'X': case 'x': base = 16; uns_integer: if (args) { switch (intsize) { case 'h': uv = (unsigned short)va_arg(*args, unsigned); break; default: uv = va_arg(*args, unsigned); break; case 'l': uv = va_arg(*args, unsigned long); break; case 'V': uv = va_arg(*args, UV); break; } } else { uv = (svix < svmax) ? SvUVx(svargs[svix++]) : 0; switch (intsize) { case 'h': uv = (unsigned short)uv; break; default: uv = (unsigned)uv; break; case 'l': uv = (unsigned long)uv; break; case 'V': break; } } integer: eptr = ebuf + sizeof ebuf; switch (base) { unsigned dig; case 16: if (!uv) alt = FALSE; p = (c == 'X') ? "0123456789ABCDEF" : "0123456789abcdef"; do { dig = uv & 15; *--eptr = p[dig]; } while (uv >>= 4); if (alt) { esignbuf[esignlen++] = '0'; esignbuf[esignlen++] = c; /* 'x' or 'X' */ } break; case 8: do { dig = uv & 7; *--eptr = '0' + dig; } while (uv >>= 3); if (alt && *eptr != '0') *--eptr = '0'; break; case 2: do { dig = uv & 1; *--eptr = '0' + dig; } while (uv >>= 1); if (alt && *eptr != '0') *--eptr = '0'; break; default: /* it had better be ten or less */ do { dig = uv % base; *--eptr = '0' + dig; } while (uv /= base); break; } elen = (ebuf + sizeof ebuf) - eptr; if (has_precis) { if (precis > elen) zeros = precis - elen; else if (precis == 0 && elen == 1 && *eptr == '0') elen = 0; } break; /* FLOATING POINT */ case 'F': c = 'f'; /* maybe %F isn't supported here */ /* FALL THROUGH */ case 'e': case 'E': case 'f': case 'g': case 'G': /* This is evil, but floating point is even more evil */ if (args) nv = va_arg(*args, double); else nv = (svix < svmax) ? SvNVx(svargs[svix++]) : 0.0; need = 0; if (c != 'e' && c != 'E') { i = PERL_INT_MIN; (void)frexp(nv, &i); if (i == PERL_INT_MIN) Perl_die(aTHX_ "panic: frexp"); if (i > 0) need = BIT_DIGITS(i); } need += has_precis ? precis : 6; /* known default */ if (need < width) need = width; need += 20; /* fudge factor */ if (PL_efloatsize < need) { Safefree(PL_efloatbuf); PL_efloatsize = need + 20; /* more fudge */ New(906, PL_efloatbuf, PL_efloatsize, char); } eptr = ebuf + sizeof ebuf; *--eptr = '\0'; *--eptr = c; if (has_precis) { base = precis; do { *--eptr = '0' + (base % 10); } while (base /= 10); *--eptr = '.'; } if (width) { base = width; do { *--eptr = '0' + (base % 10); } while (base /= 10); } if (fill == '0') *--eptr = fill; if (left) *--eptr = '-'; if (plus) *--eptr = plus; if (alt) *--eptr = '#'; *--eptr = '%'; (void)sprintf(PL_efloatbuf, eptr, nv); eptr = PL_efloatbuf; elen = strlen(PL_efloatbuf); #ifdef LC_NUMERIC /* * User-defined locales may include arbitrary characters. * And, unfortunately, some system may alloc the "C" locale * to be overridden by a malicious user. */ if (used_locale) *used_locale = TRUE; #endif /* LC_NUMERIC */ break; /* SPECIAL */ case 'n': i = SvCUR(sv) - origlen; if (args) { switch (intsize) { case 'h': *(va_arg(*args, short*)) = i; break; default: *(va_arg(*args, int*)) = i; break; case 'l': *(va_arg(*args, long*)) = i; break; case 'V': *(va_arg(*args, IV*)) = i; break; } } else if (svix < svmax) sv_setuv(svargs[svix++], (UV)i); continue; /* not "break" */ /* UNKNOWN */ default: unknown: if (!args && ckWARN(WARN_PRINTF) && (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) { SV *msg = sv_newmortal(); Perl_sv_setpvf(aTHX_ msg, "Invalid conversion in %s: ", (PL_op->op_type == OP_PRTF) ? "printf" : "sprintf"); if (c) Perl_sv_catpvf(aTHX_ msg, isPRINT(c) ? "\"%%%c\"" : "\"%%\\%03o\"", c & 0xFF); else sv_catpv(msg, "end of string"); Perl_warner(aTHX_ WARN_PRINTF, "%_", msg); /* yes, this is reentrant */ } /* output mangled stuff ... */ if (c == '\0') --q; eptr = p; elen = q - p; /* ... right here, because formatting flags should not apply */ SvGROW(sv, SvCUR(sv) + elen + 1); p = SvEND(sv); memcpy(p, eptr, elen); p += elen; *p = '\0'; SvCUR(sv) = p - SvPVX(sv); continue; /* not "break" */ } have = esignlen + zeros + elen; need = (have > width ? have : width); gap = need - have; SvGROW(sv, SvCUR(sv) + need + 1); p = SvEND(sv); if (esignlen && fill == '0') { for (i = 0; i < esignlen; i++) *p++ = esignbuf[i]; } if (gap && !left) { memset(p, fill, gap); p += gap; } if (esignlen && fill != '0') { for (i = 0; i < esignlen; i++) *p++ = esignbuf[i]; } if (zeros) { for (i = zeros; i; i--) *p++ = '0'; } if (elen) { memcpy(p, eptr, elen); p += elen; } if (gap && left) { memset(p, ' ', gap); p += gap; } *p = '\0'; SvCUR(sv) = p - SvPVX(sv); } }