1 /* $RCSfile: sv.c,v $$Revision: 4.1 $$Date: 92/08/07 18:26:45 $
3 * Copyright (c) 1991, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
9 * Revision 4.1 92/08/07 18:26:45 lwall
11 * Revision 4.0.1.6 92/06/11 21:14:21 lwall
12 * patch34: quotes containing subscripts containing variables didn't parse right
14 * Revision 4.0.1.5 92/06/08 15:40:43 lwall
15 * patch20: removed implicit int declarations on functions
16 * patch20: Perl now distinguishes overlapped copies from non-overlapped
17 * patch20: paragraph mode now skips extra newlines automatically
18 * patch20: fixed memory leak in doube-quote interpretation
19 * patch20: made /\$$foo/ look for literal '$foo'
20 * patch20: "$var{$foo'bar}" didn't scan subscript correctly
21 * patch20: a splice on non-existent array elements could dump core
22 * patch20: running taintperl explicitly now does checks even if $< == $>
24 * Revision 4.0.1.4 91/11/05 18:40:51 lwall
25 * patch11: $foo .= <BAR> could overrun malloced memory
26 * patch11: \$ didn't always make it through double-quoter to regexp routines
27 * patch11: prepared for ctype implementations that don't define isascii()
29 * Revision 4.0.1.3 91/06/10 01:27:54 lwall
30 * patch10: $) and $| incorrectly handled in run-time patterns
32 * Revision 4.0.1.2 91/06/07 11:58:13 lwall
33 * patch4: new copyright notice
34 * patch4: taint check on undefined string could cause core dump
36 * Revision 4.0.1.1 91/04/12 09:15:30 lwall
37 * patch1: fixed undefined environ problem
38 * patch1: substr($ENV{"PATH"},0,0) = "/foo:" didn't modify environment
39 * patch1: $foo .= <BAR> could cause core dump for certain lengths of $foo
41 * Revision 4.0 91/03/20 01:39:55 lwall
63 sv_root = (SV*)SvANY(sv);
83 sv_root = (SV*)malloc(1008);
85 svend = &sv[1008 / sizeof(SV) - 1];
87 SvANY(sv) = (SV*)(sv + 1);
96 static XPVIV* more_xiv();
104 xiv_root = *(I32**)xiv;
105 return (XPVIV*)((char*)xiv - sizeof(XPV));
114 I32* xiv = (I32*)((char*)(p) + sizeof(XPV));
115 *(I32**)xiv = xiv_root;
124 register I32* xivend;
125 xiv = (I32*)malloc(1008);
126 xivend = &xiv[1008 / sizeof(I32) - 1];
127 xiv += (sizeof(XPV) - 1) / sizeof(I32) + 1; /* fudge by size of XPV */
129 while (xiv < xivend) {
130 *(I32**)xiv = (I32*)(xiv + 1); /* XXX busted on Alpha? */
137 static double* xnv_root;
139 static XPVNV* more_xnv();
147 xnv_root = *(double**)xnv;
148 return (XPVNV*)((char*)xnv - sizeof(XPVIV));
157 double* xnv = (double*)((char*)(p) + sizeof(XPVIV));
158 *(double**)xnv = xnv_root;
166 register double* xnv;
167 register double* xnvend;
168 xnv = (double*)malloc(1008);
169 xnvend = &xnv[1008 / sizeof(double) - 1];
170 xnv += (sizeof(XPVIV) - 1) / sizeof(double) + 1; /* fudge by sizeof XPVIV */
172 while (xnv < xnvend) {
173 *(double**)xnv = (double*)(xnv + 1);
180 static XPV* xpv_root;
182 static XPV* more_xpv();
190 xpv_root = (XPV*)xpv->xpv_pv;
200 p->xpv_pv = (char*)xpv_root;
209 register XPV* xpvend;
210 xpv_root = (XPV*)malloc(1008);
212 xpvend = &xpv[1008 / sizeof(XPV) - 1];
213 while (xpv < xpvend) {
214 xpv->xpv_pv = (char*)(xpv + 1);
223 #define new_SV() sv = (SV*)malloc(sizeof(SV))
224 #define del_SV(p) free((char*)p)
231 sv_root = (SV*)SvANY(sv); \
235 #define del_SV(p) del_sv(p)
240 #define new_XIV() (void*)malloc(sizeof(XPVIV))
241 #define del_XIV(p) free((char*)p)
243 #define new_XIV() new_xiv()
244 #define del_XIV(p) del_xiv(p)
248 #define new_XNV() (void*)malloc(sizeof(XPVNV))
249 #define del_XNV(p) free((char*)p)
251 #define new_XNV() new_xnv()
252 #define del_XNV(p) del_xnv(p)
256 #define new_XPV() (void*)malloc(sizeof(XPV))
257 #define del_XPV(p) free((char*)p)
259 #define new_XPV() new_xpv()
260 #define del_XPV(p) del_xpv(p)
263 #define new_XPVIV() (void*)malloc(sizeof(XPVIV))
264 #define del_XPVIV(p) free((char*)p)
266 #define new_XPVNV() (void*)malloc(sizeof(XPVNV))
267 #define del_XPVNV(p) free((char*)p)
269 #define new_XPVMG() (void*)malloc(sizeof(XPVMG))
270 #define del_XPVMG(p) free((char*)p)
272 #define new_XPVLV() (void*)malloc(sizeof(XPVLV))
273 #define del_XPVLV(p) free((char*)p)
275 #define new_XPVAV() (void*)malloc(sizeof(XPVAV))
276 #define del_XPVAV(p) free((char*)p)
278 #define new_XPVHV() (void*)malloc(sizeof(XPVHV))
279 #define del_XPVHV(p) free((char*)p)
281 #define new_XPVCV() (void*)malloc(sizeof(XPVCV))
282 #define del_XPVCV(p) free((char*)p)
284 #define new_XPVGV() (void*)malloc(sizeof(XPVGV))
285 #define del_XPVGV(p) free((char*)p)
287 #define new_XPVBM() (void*)malloc(sizeof(XPVBM))
288 #define del_XPVBM(p) free((char*)p)
290 #define new_XPVFM() (void*)malloc(sizeof(XPVFM))
291 #define del_XPVFM(p) free((char*)p)
306 if (SvTYPE(sv) == mt)
309 switch (SvTYPE(sv)) {
320 sv_free((SV*)SvANY(sv));
325 nv = (double)(unsigned long)SvANY(sv);
337 nv = (double)SvIVX(sv);
343 else if (mt == SVt_NV)
356 if (mt == SVt_PV || mt == SVt_PVIV)
379 del_XPVIV(SvANY(sv));
390 del_XPVNV(SvANY(sv));
400 del_XPVMG(SvANY(sv));
403 croak("Can't upgrade that kind of scalar");
408 croak("Can't upgrade to undef");
413 SvANY(sv) = new_XIV();
417 SvANY(sv) = new_XNV();
421 SvANY(sv) = new_XPV();
427 SvANY(sv) = new_XPVIV();
437 SvANY(sv) = new_XPVNV();
445 SvANY(sv) = new_XPVMG();
455 SvANY(sv) = new_XPVLV();
469 SvANY(sv) = new_XPVAV();
484 SvANY(sv) = new_XPVHV();
500 SvANY(sv) = new_XPVCV();
519 SvANY(sv) = new_XPVGV();
533 SvANY(sv) = new_XPVBM();
546 SvANY(sv) = new_XPVFM();
573 else if (sv == (SV*)0x55555555 || SvTYPE(sv) == 'U') {
577 else if (SvREFCNT(sv) == 0 && !SvREADONLY(sv)) {
582 switch (SvTYPE(sv)) {
593 if (t - tokenbuf > 10) {
594 strcpy(tokenbuf + 3,"...");
646 sprintf(t,"(%d+\"%0.127s\")",SvIVX(sv),SvPVX(sv));
648 sprintf(t,"(\"%0.127s\")",SvPVX(sv));
651 sprintf(t,"(%g)",SvNVX(sv));
653 sprintf(t,"(%ld)",(long)SvIVX(sv));
666 SvLEN(sv) += SvIVX(sv);
667 SvPVX(sv) -= SvIVX(sv);
669 Move(s, SvPVX(sv), SvCUR(sv)+1, char);
671 SvFLAGS(sv) &= ~SVf_OOK;
680 unsigned long newlen;
686 if (newlen >= 0x10000) {
687 fprintf(stderr, "Allocation too large: %lx\n", newlen);
693 if (SvTYPE(sv) < SVt_PV) {
694 sv_upgrade(sv, SVt_PV);
697 else if (SvOOK(sv)) { /* pv is offset? */
700 if (newlen > SvLEN(sv))
701 newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */
705 if (newlen > SvLEN(sv)) { /* need more room? */
707 Renew(s,newlen,char);
709 New(703,s,newlen,char);
711 SvLEN_set(sv, newlen);
723 switch (SvTYPE(sv)) {
726 sv_upgrade(sv, SVt_IV);
729 sv_upgrade(sv, SVt_PVNV);
732 sv_upgrade(sv, SVt_PVIV);
736 SvIOK_only(sv); /* validate number */
747 if (SvTYPE(sv) < SVt_NV)
748 sv_upgrade(sv, SVt_NV);
749 else if (SvTYPE(sv) < SVt_PVNV)
750 sv_upgrade(sv, SVt_PVNV);
751 else if (SvPOK(sv)) {
755 SvNOK_only(sv); /* validate number */
770 return (I32)SvNVX(sv);
771 if (SvPOKp(sv) && SvLEN(sv))
772 return (I32)atol(SvPVX(sv));
775 if (SvREADONLY(sv)) {
777 return (I32)SvNVX(sv);
778 if (SvPOK(sv) && SvLEN(sv))
779 return (I32)atol(SvPVX(sv));
781 warn("Use of uninitialized variable");
784 switch (SvTYPE(sv)) {
786 return (I32)SvANY(sv);
788 sv_upgrade(sv, SVt_IV);
791 sv_upgrade(sv, SVt_PVIV);
794 sv_upgrade(sv, SVt_PVNV);
798 SvIVX(sv) = (I32)SvNVX(sv);
799 else if (SvPOK(sv) && SvLEN(sv)) {
800 if (dowarn && !looks_like_number(sv)) {
802 warn("Argument wasn't numeric for \"%s\"",op_name[op->op_type]);
804 warn("Argument wasn't numeric");
806 SvIVX(sv) = (I32)atol(SvPVX(sv));
810 warn("Use of uninitialized variable");
811 SvUPGRADE(sv, SVt_IV);
815 DEBUG_c((stderr,"0x%lx 2iv(%d)\n",sv,SvIVX(sv)));
829 if (SvPOKp(sv) && SvLEN(sv))
830 return atof(SvPVX(sv));
832 return (double)SvIVX(sv);
835 if (SvREADONLY(sv)) {
836 if (SvPOK(sv) && SvLEN(sv))
837 return atof(SvPVX(sv));
839 warn("Use of uninitialized variable");
842 if (SvTYPE(sv) < SVt_NV) {
843 if (SvTYPE(sv) == SVt_REF)
844 return (double)(unsigned long)SvANY(sv);
845 if (SvTYPE(sv) == SVt_IV)
846 sv_upgrade(sv, SVt_PVNV);
848 sv_upgrade(sv, SVt_NV);
849 DEBUG_c((stderr,"0x%lx num(%g)\n",sv,SvNVX(sv)));
852 else if (SvTYPE(sv) < SVt_PVNV)
853 sv_upgrade(sv, SVt_PVNV);
855 (!SvPOK(sv) || !strchr(SvPVX(sv),'.') || !looks_like_number(sv)))
857 SvNVX(sv) = (double)SvIVX(sv);
859 else if (SvPOK(sv) && SvLEN(sv)) {
860 if (dowarn && !SvIOK(sv) && !looks_like_number(sv)) {
862 warn("Argument wasn't numeric for \"%s\"",op_name[op->op_type]);
864 warn("Argument wasn't numeric");
866 SvNVX(sv) = atof(SvPVX(sv));
870 warn("Use of uninitialized variable");
874 DEBUG_c((stderr,"0x%lx 2nv(%g)\n",sv,SvNVX(sv)));
897 (void)sprintf(tokenbuf,"%ld",SvIVX(sv));
898 *lp = strlen(tokenbuf);
902 (void)sprintf(tokenbuf,"%.20g",SvNVX(sv));
903 *lp = strlen(tokenbuf);
909 if (SvTYPE(sv) == SVt_REF) {
914 switch (SvTYPE(sv)) {
922 case SVt_PVMG: s = "SCALAR"; break;
923 case SVt_PVLV: s = "LVALUE"; break;
924 case SVt_PVAV: s = "ARRAY"; break;
925 case SVt_PVHV: s = "HASH"; break;
926 case SVt_PVCV: s = "CODE"; break;
927 case SVt_PVGV: s = "GLOB"; break;
928 case SVt_PVBM: s = "SEARCHSTRING"; break;
929 case SVt_PVFM: s = "FORMATLINE"; break;
930 default: s = "UNKNOWN"; break;
932 if (SvSTORAGE(sv) == 'O')
933 sprintf(tokenbuf, "%s=%s(0x%lx)",
934 HvNAME(SvSTASH(sv)), s, (unsigned long)sv);
936 sprintf(tokenbuf, "%s(0x%lx)", s, (unsigned long)sv);
942 if (SvREADONLY(sv)) {
944 (void)sprintf(tokenbuf,"%ld",SvIVX(sv));
945 *lp = strlen(tokenbuf);
949 (void)sprintf(tokenbuf,"%.20g",SvNVX(sv));
950 *lp = strlen(tokenbuf);
954 warn("Use of uninitialized variable");
958 if (!SvUPGRADE(sv, SVt_PV))
961 if (SvTYPE(sv) < SVt_PVNV)
962 sv_upgrade(sv, SVt_PVNV);
965 olderrno = errno; /* some Xenix systems wipe out errno here */
966 #if defined(scs) && defined(ns32000)
967 gcvt(SvNVX(sv),20,s);
970 if (SvNVX(sv) == 0.0)
974 (void)sprintf(s,"%.20g",SvNVX(sv));
983 else if (SvIOK(sv)) {
984 if (SvTYPE(sv) < SVt_PVIV)
985 sv_upgrade(sv, SVt_PVIV);
988 olderrno = errno; /* some Xenix systems wipe out errno here */
989 (void)sprintf(s,"%ld",SvIVX(sv));
995 warn("Use of uninitialized variable");
1000 *lp = s - SvPVX(sv);
1003 DEBUG_c((stderr,"0x%lx 2pv(%s)\n",sv,SvPVX(sv)));
1007 /* This function is only called on magical items */
1015 if (SvTYPE(sv) == SVt_REF)
1016 return SvANY(sv) != 0;
1019 if ((Xpv = (XPV*)SvANY(sv)) &&
1020 (*Xpv->xpv_pv > '0' ||
1022 (Xpv->xpv_cur && *Xpv->xpv_pv != '0')))
1029 return SvIVX(sv) != 0;
1032 return SvNVX(sv) != 0.0;
1039 /* Note: sv_setsv() should not be called with a source string that needs
1040 * to be reused, since it may destroy the source string if it is marked
1053 if (SvREADONLY(dstr))
1058 /* There's a lot of redundancy below but we're going for speed here */
1060 switch (SvTYPE(sstr)) {
1062 if (SvTYPE(dstr) == SVt_REF) {
1063 sv_free((SV*)SvANY(dstr));
1065 SvTYPE(dstr) = SVt_NULL;
1071 if (SvTYPE(dstr) < SVt_REF)
1072 sv_upgrade(dstr, SVt_REF);
1073 if (SvTYPE(dstr) == SVt_REF) {
1074 sv_free((SV*)SvANY(dstr));
1076 SvANY(dstr) = (void*)sv_ref((SV*)SvANY(sstr));
1079 if (SvMAGICAL(dstr))
1080 croak("Can't assign a reference to a magical variable");
1081 if (SvREFCNT(dstr) != 1)
1082 warn("Reference miscount in sv_setsv()");
1085 SvTYPE(dstr) = SVt_REF;
1086 SvANY(dstr) = (void*)sv_ref((SV*)SvANY(sstr));
1092 if (SvTYPE(dstr) < SVt_IV)
1093 sv_upgrade(dstr, SVt_IV);
1094 else if (SvTYPE(dstr) == SVt_PV)
1095 sv_upgrade(dstr, SVt_PVIV);
1096 else if (SvTYPE(dstr) == SVt_NV)
1097 sv_upgrade(dstr, SVt_PVNV);
1098 flags = SvFLAGS(sstr);
1101 if (SvTYPE(dstr) < SVt_NV)
1102 sv_upgrade(dstr, SVt_NV);
1103 else if (SvTYPE(dstr) == SVt_PV)
1104 sv_upgrade(dstr, SVt_PVNV);
1105 else if (SvTYPE(dstr) == SVt_PVIV)
1106 sv_upgrade(dstr, SVt_PVNV);
1107 flags = SvFLAGS(sstr);
1110 if (SvTYPE(dstr) < SVt_PV)
1111 sv_upgrade(dstr, SVt_PV);
1112 flags = SvFLAGS(sstr);
1115 if (SvTYPE(dstr) < SVt_PVIV)
1116 sv_upgrade(dstr, SVt_PVIV);
1117 flags = SvFLAGS(sstr);
1120 if (SvTYPE(dstr) < SVt_PVNV)
1121 sv_upgrade(dstr, SVt_PVNV);
1122 flags = SvFLAGS(sstr);
1125 if (SvTYPE(dstr) <= SVt_PVGV) {
1126 if (SvTYPE(dstr) < SVt_PVGV)
1127 sv_upgrade(dstr, SVt_PVGV);
1134 GvIO(sstr) = newIO();
1137 GvGP(dstr) = gp_ref(GvGP(sstr));
1144 if (SvTYPE(dstr) < SvTYPE(sstr))
1145 sv_upgrade(dstr, SvTYPE(sstr));
1146 if (SvMAGICAL(sstr)) {
1148 flags = SvPRIVATE(sstr);
1151 flags = SvFLAGS(sstr);
1155 SvPRIVATE(dstr) = SvPRIVATE(sstr) & ~(SVf_IOK|SVf_POK|SVf_NOK);
1157 if (flags & SVf_POK) {
1160 * Check to see if we can just swipe the string. If so, it's a
1161 * possible small lose on short strings, but a big win on long ones.
1162 * It might even be a win on short strings if SvPVX(dstr)
1163 * has to be allocated and SvPVX(sstr) has to be freed.
1166 if (SvTEMP(sstr)) { /* slated for free anyway? */
1169 Safefree(SvPVX(dstr));
1171 SvPV_set(dstr, SvPVX(sstr));
1172 SvLEN_set(dstr, SvLEN(sstr));
1173 SvCUR_set(dstr, SvCUR(sstr));
1176 SvPV_set(sstr, Nullch);
1178 SvPOK_off(sstr); /* wipe out any weird flags */
1179 SvPVX(sstr) = 0; /* so sstr frees uneventfully */
1181 else { /* have to copy actual string */
1182 if (SvPVX(dstr)) { /* XXX ck type */
1185 sv_setpvn(dstr,SvPVX(sstr),SvCUR(sstr));
1188 if (flags & SVf_NOK) {
1190 SvNVX(dstr) = SvNVX(sstr);
1192 if (flags & SVf_IOK) {
1194 SvIVX(dstr) = SvIVX(sstr);
1197 else if (flags & SVf_NOK) {
1198 SvNVX(dstr) = SvNVX(sstr);
1202 SvIVX(dstr) = SvIVX(sstr);
1205 else if (flags & SVf_IOK) {
1207 SvIVX(dstr) = SvIVX(sstr);
1216 sv_setpvn(sv,ptr,len)
1219 register STRLEN len;
1227 if (!SvUPGRADE(sv, SVt_PV))
1229 SvGROW(sv, len + 1);
1231 Move(ptr,SvPVX(sv),len,char);
1234 SvPOK_only(sv); /* validate pointer */
1243 register STRLEN len;
1252 if (!SvUPGRADE(sv, SVt_PV))
1254 SvGROW(sv, len + 1);
1255 Move(ptr,SvPVX(sv),len+1,char);
1257 SvPOK_only(sv); /* validate pointer */
1262 sv_usepvn(sv,ptr,len)
1265 register STRLEN len;
1269 if (!SvUPGRADE(sv, SVt_PV))
1276 Safefree(SvPVX(sv));
1277 Renew(ptr, len+1, char);
1280 SvLEN_set(sv, len+1);
1282 SvPOK_only(sv); /* validate pointer */
1287 sv_chop(sv,ptr) /* like set but assuming ptr is in sv */
1291 register STRLEN delta;
1293 if (!ptr || !SvPOK(sv))
1297 if (SvTYPE(sv) < SVt_PVIV)
1298 sv_upgrade(sv,SVt_PVIV);
1302 SvFLAGS(sv) |= SVf_OOK;
1304 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK);
1305 delta = ptr - SvPVX(sv);
1313 sv_catpvn(sv,ptr,len)
1316 register STRLEN len;
1323 SvGROW(sv, tlen + len + 1);
1324 Move(ptr,SvPVX(sv)+tlen,len,char);
1327 SvPOK_only(sv); /* validate pointer */
1340 if (s = SvPV(sstr, len))
1341 sv_catpvn(dstr,s,len);
1349 register STRLEN len;
1359 SvGROW(sv, tlen + len + 1);
1360 Move(ptr,SvPVX(sv)+tlen,len+1,char);
1362 SvPOK_only(sv); /* validate pointer */
1381 sv_upgrade(sv, SVt_PV);
1382 SvGROW(sv, len + 1);
1388 sv_magic(sv, obj, how, name, namlen)
1399 if (SvMAGICAL(sv)) {
1400 if (SvMAGIC(sv) && mg_find(sv, how))
1404 if (!SvUPGRADE(sv, SVt_PVMG))
1407 SvPRIVATE(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
1408 SvPRIVATE(sv) |= SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
1409 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
1411 Newz(702,mg, 1, MAGIC);
1412 mg->mg_moremagic = SvMAGIC(sv);
1415 mg->mg_obj = sv_ref(obj);
1417 mg->mg_len = namlen;
1418 if (name && namlen >= 0)
1419 mg->mg_ptr = nsavestr(name, namlen);
1422 mg->mg_virtual = &vtbl_sv;
1425 mg->mg_virtual = &vtbl_bm;
1428 mg->mg_virtual = &vtbl_env;
1431 mg->mg_virtual = &vtbl_envelem;
1434 mg->mg_virtual = &vtbl_mglob;
1437 mg->mg_virtual = &vtbl_isa;
1440 mg->mg_virtual = &vtbl_isaelem;
1446 mg->mg_virtual = &vtbl_dbline;
1449 mg->mg_virtual = &vtbl_pack;
1452 mg->mg_virtual = &vtbl_packelem;
1455 mg->mg_virtual = &vtbl_sig;
1458 mg->mg_virtual = &vtbl_sigelem;
1461 mg->mg_virtual = &vtbl_taint;
1464 mg->mg_virtual = &vtbl_uvar;
1467 mg->mg_virtual = &vtbl_vec;
1470 mg->mg_virtual = &vtbl_substr;
1473 mg->mg_virtual = &vtbl_glob;
1476 mg->mg_virtual = &vtbl_arylen;
1479 croak("Don't know how to handle magic of type '%c'", how);
1484 sv_unmagic(sv, type)
1493 for (mg = *mgp; mg; mg = *mgp) {
1494 if (mg->mg_type == type) {
1495 MGVTBL* vtbl = mg->mg_virtual;
1496 *mgp = mg->mg_moremagic;
1497 if (vtbl && vtbl->svt_free)
1498 (*vtbl->svt_free)(sv, mg);
1499 if (mg->mg_ptr && mg->mg_type != 'g')
1500 Safefree(mg->mg_ptr);
1501 sv_free(mg->mg_obj);
1505 mgp = &mg->mg_moremagic;
1509 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
1510 SvFLAGS(sv) |= SvPRIVATE(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
1511 SvPRIVATE(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
1518 sv_insert(bigstr,offset,len,little,littlelen)
1527 register char *midend;
1528 register char *bigend;
1531 if (SvREADONLY(bigstr))
1535 i = littlelen - len;
1536 if (i > 0) { /* string might grow */
1537 if (!SvUPGRADE(bigstr, SVt_PV))
1539 SvGROW(bigstr, SvCUR(bigstr) + i + 1);
1540 big = SvPVX(bigstr);
1541 mid = big + offset + len;
1542 midend = bigend = big + SvCUR(bigstr);
1545 while (midend > mid) /* shove everything down */
1546 *--bigend = *--midend;
1547 Move(little,big+offset,littlelen,char);
1553 Move(little,SvPVX(bigstr)+offset,len,char);
1558 big = SvPVX(bigstr);
1561 bigend = big + SvCUR(bigstr);
1563 if (midend > bigend)
1564 croak("panic: sv_insert");
1566 if (mid - big > bigend - midend) { /* faster to shorten from end */
1568 Move(little, mid, littlelen,char);
1571 i = bigend - midend;
1573 Move(midend, mid, i,char);
1577 SvCUR_set(bigstr, mid - big);
1580 else if (i = mid - big) { /* faster from front */
1581 midend -= littlelen;
1583 sv_chop(bigstr,midend-i);
1588 Move(little, mid, littlelen,char);
1590 else if (littlelen) {
1591 midend -= littlelen;
1592 sv_chop(bigstr,midend);
1593 Move(little,midend,littlelen,char);
1596 sv_chop(bigstr,midend);
1601 /* make sv point to what nstr did */
1608 U32 refcnt = SvREFCNT(sv);
1611 if (SvREFCNT(nsv) != 1)
1612 warn("Reference miscount in sv_replace()");
1613 if (SvMAGICAL(sv)) {
1614 SvUPGRADE(nsv, SVt_PVMG);
1615 SvMAGIC(nsv) = SvMAGIC(sv);
1622 StructCopy(nsv,sv,SV);
1623 SvREFCNT(sv) = refcnt;
1632 assert(SvREFCNT(sv) == 0);
1634 if (SvSTORAGE(sv) == 'O') {
1636 BINOP myop; /* fake syntax tree node */
1639 SvSTORAGE(sv) = 0; /* Curse the object. */
1645 curcop = &compiling;
1646 curstash = SvSTASH(sv);
1647 destructor = gv_fetchpv("DESTROY", FALSE);
1649 if (destructor && GvCV(destructor)) {
1650 SV* ref = sv_mortalcopy(&sv_undef);
1651 sv_upgrade(ref, SVt_REF);
1652 SvANY(ref) = (void*)sv_ref(sv);
1656 myop.op_last = (OP*)&myop;
1657 myop.op_flags = OPf_STACKED;
1658 myop.op_next = Nullop;
1661 PUSHs((SV*)destructor);
1665 op = pp_entersubr();
1670 SvTYPE(ref) = SVt_NULL;
1675 switch (SvTYPE(sv)) {
1704 Safefree(SvPVX(sv));
1711 sv_free((SV*)SvANY(sv));
1717 switch (SvTYPE(sv)) {
1732 del_XPVIV(SvANY(sv));
1735 del_XPVNV(SvANY(sv));
1738 del_XPVMG(SvANY(sv));
1741 del_XPVLV(SvANY(sv));
1744 del_XPVAV(SvANY(sv));
1747 del_XPVHV(SvANY(sv));
1750 del_XPVCV(SvANY(sv));
1753 del_XPVGV(SvANY(sv));
1756 del_XPVBM(SvANY(sv));
1759 del_XPVFM(SvANY(sv));
1762 DEB(SvTYPE(sv) = 0xff;)
1780 if (SvREADONLY(sv)) {
1781 if (sv == &sv_undef || sv == &sv_yes || sv == &sv_no)
1784 if (SvREFCNT(sv) == 0) {
1785 warn("Attempt to free unreferenced scalar");
1790 warn("Attempt to free temp prematurely");
1794 if (--SvREFCNT(sv) > 0)
1797 DEB(SvTYPE(sv) = 0xff;)
1830 pv1 = SvPV(str1, cur1);
1835 pv2 = SvPV(str2, cur2);
1840 return !bcmp(pv1, pv2, cur1);
1859 pv1 = SvPV(str1, cur1);
1866 pv2 = SvPV(str2, cur2);
1869 return cur2 ? -1 : 0;
1875 if (retval = memcmp(pv1, pv2, cur1))
1876 return retval < 0 ? -1 : 1;
1881 else if (retval = memcmp(pv1, pv2, cur2))
1882 return retval < 0 ? -1 : 1;
1883 else if (cur1 == cur2)
1890 sv_gets(sv,fp,append)
1895 register char *bp; /* we're going to steal some values */
1896 register I32 cnt; /* from the stdio struct and put EVERYTHING */
1897 register STDCHAR *ptr; /* in the innermost loop into registers */
1898 register I32 newline = rschar;/* (assuming >= 6 registers) */
1905 if (!SvUPGRADE(sv, SVt_PV))
1907 if (rspara) { /* have to do this both before and after */
1908 do { /* to make sure file boundaries work right */
1916 #ifdef STDSTDIO /* Here is some breathtakingly efficient cheating */
1917 cnt = fp->_cnt; /* get count into register */
1918 SvPOK_only(sv); /* validate pointer */
1919 if (SvLEN(sv) - append <= cnt + 1) { /* make sure we have the room */
1920 if (cnt > 80 && SvLEN(sv) > append) {
1921 shortbuffered = cnt - SvLEN(sv) + append + 1;
1922 cnt -= shortbuffered;
1926 SvGROW(sv, append+cnt+2);/* (remembering cnt can be -1) */
1931 bp = SvPVX(sv) + append; /* move these two too to registers */
1936 while (--cnt >= 0) { /* this */ /* eat */
1937 if ((*bp++ = *ptr++) == newline) /* really */ /* dust */
1938 goto thats_all_folks; /* screams */ /* sed :-) */
1942 if (shortbuffered) { /* oh well, must extend */
1943 cnt = shortbuffered;
1945 bpx = bp - SvPVX(sv); /* prepare for possible relocation */
1947 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
1948 bp = SvPVX(sv) + bpx; /* reconstitute our pointer */
1952 fp->_cnt = cnt; /* deregisterize cnt and ptr */
1954 i = _filbuf(fp); /* get more characters */
1956 ptr = fp->_ptr; /* reregisterize cnt and ptr */
1958 bpx = bp - SvPVX(sv); /* prepare for possible relocation */
1960 SvGROW(sv, bpx + cnt + 2);
1961 bp = SvPVX(sv) + bpx; /* reconstitute our pointer */
1963 if (i == newline) { /* all done for now? */
1965 goto thats_all_folks;
1967 else if (i == EOF) /* all done for ever? */
1968 goto thats_really_all_folks;
1969 *bp++ = i; /* now go back to screaming loop */
1973 if (rslen > 1 && (bp - SvPVX(sv) < rslen || bcmp(bp - rslen, rs, rslen)))
1974 goto screamer; /* go back to the fray */
1975 thats_really_all_folks:
1977 cnt += shortbuffered;
1978 fp->_cnt = cnt; /* put these back or we're in trouble */
1981 SvCUR_set(sv, bp - SvPVX(sv)); /* set length */
1983 #else /* !STDSTDIO */ /* The big, slow, and stupid way */
1987 register char * bpe = buf + sizeof(buf) - 3;
1991 while ((i = getc(fp)) != EOF && (*bp++ = i) != newline && bp < bpe) ;
1994 sv_catpvn(sv, buf, bp - buf);
1996 sv_setpvn(sv, buf, bp - buf);
1997 if (i != EOF /* joy */
2005 bcmp(SvPVX(sv) + SvCUR(sv) - rslen, rs, rslen)
2016 #endif /* STDSTDIO */
2027 return SvCUR(sv) - append ? SvPVX(sv) : Nullch;
2041 if (SvMAGICAL(sv)) {
2043 flags = SvPRIVATE(sv);
2046 flags = SvFLAGS(sv);
2047 if (flags & SVf_IOK) {
2052 if (flags & SVf_NOK) {
2057 if (!(flags & SVf_POK) || !*SvPVX(sv)) {
2058 if (!SvUPGRADE(sv, SVt_NV))
2065 while (isALPHA(*d)) d++;
2066 while (isDIGIT(*d)) d++;
2068 sv_setnv(sv,atof(SvPVX(sv)) + 1.0); /* punt */
2072 while (d >= SvPVX(sv)) {
2082 *(d--) -= 'z' - 'a' + 1;
2085 /* oh,oh, the number grew */
2086 SvGROW(sv, SvCUR(sv) + 2);
2088 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
2106 if (SvMAGICAL(sv)) {
2108 flags = SvPRIVATE(sv);
2111 flags = SvFLAGS(sv);
2112 if (flags & SVf_IOK) {
2117 if (flags & SVf_NOK) {
2122 if (!(flags & SVf_POK)) {
2123 if (!SvUPGRADE(sv, SVt_NV))
2129 sv_setnv(sv,atof(SvPVX(sv)) - 1.0);
2132 /* Make a string that will exist for the duration of the expression
2133 * evaluation. Actually, it may have to last longer than that, but
2134 * hopefully we won't free it until it has been assigned to a
2135 * permanent location. */
2138 sv_mortalcopy(oldstr)
2146 sv_setsv(sv,oldstr);
2147 if (++tmps_ix > tmps_max) {
2149 if (!(tmps_max & 127)) {
2151 Renew(tmps_stack, tmps_max + 128, SV*);
2153 New(702,tmps_stack, 128, SV*);
2156 tmps_stack[tmps_ix] = sv;
2162 /* same thing without the copying */
2172 if (++tmps_ix > tmps_max) {
2174 if (!(tmps_max & 127)) {
2176 Renew(tmps_stack, tmps_max + 128, SV*);
2178 New(704,tmps_stack, 128, SV*);
2181 tmps_stack[tmps_ix] = sv;
2199 sv_setpvn(sv,s,len);
2229 /* make an exact duplicate of old */
2239 if (SvTYPE(old) == 0xff) {
2240 warn("semi-panic: attempt to dup freed string");
2269 if (!*s) { /* reset ?? searches */
2270 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
2271 pm->op_pmflags &= ~PMf_USED;
2276 /* reset variables */
2278 if (!HvARRAY(stash))
2281 Zero(todo, 256, char);
2288 for ( ; i <= max; i++) {
2291 for (i = 0; i <= HvMAX(stash); i++) {
2292 for (entry = HvARRAY(stash)[i];
2294 entry = entry->hent_next) {
2295 if (!todo[(U8)*entry->hent_key])
2297 gv = (GV*)entry->hent_val;
2300 if (SvTYPE(sv) >= SVt_PV) {
2303 if (SvPVX(sv) != Nullch)
2312 environ[0] = Nullch;
2320 sv_2cv(sv, st, gvp, lref)
2330 return *gvp = Nullgv, Nullcv;
2331 switch (SvTYPE(sv)) {
2333 cv = (CV*)SvANY(sv);
2334 if (SvTYPE(cv) != SVt_PVCV)
2335 croak("Not a subroutine reference");
2351 gv = gv_fetchpv(SvPV(sv, na), lref);
2369 if ((Xpv = (XPV*)SvANY(sv)) &&
2370 (*Xpv->xpv_pv > '0' ||
2372 (Xpv->xpv_cur && *Xpv->xpv_pv != '0')))
2379 return SvIVX(sv) != 0;
2382 return SvNVX(sv) != 0.0;
2384 return sv_2bool(sv);
2397 return (double)SvIVX(Sv);
2410 return sv_2pv(sv, lp);
2419 if (SvTYPE(sv) != SVt_REF)
2421 sv = (SV*)SvANY(sv);
2422 if (SvSTORAGE(sv) != 'O')
2425 return strEQ(HvNAME(SvSTASH(sv)), name);
2429 sv_setptrobj(rv, ptr, name)
2443 sv_setnv(sv, (double)(unsigned long)ptr);
2444 sv_upgrade(rv, SVt_REF);
2445 SvANY(rv) = (void*)sv_ref(sv);
2447 stash = fetch_stash(newSVpv(name,0), TRUE);
2448 SvSTORAGE(sv) = 'O';
2449 SvUPGRADE(sv, SVt_PVMG);
2450 SvSTASH(sv) = stash;