1 /* This file is part of the "version" CPAN distribution. Please avoid
2 editing it in the perl core. */
8 #define VERSION_MAX 0x7FFFFFFF
11 =for apidoc prescan_version
13 Validate that a given string can be parsed as a version object, but doesn't
14 actually perform the parsing. Can use either strict or lax validation rules.
15 Can optionally set a number of hint variables to save the parsing code
16 some time when tokenizing.
21 #ifdef VUTIL_REPLACE_CORE
22 Perl_prescan_version2(pTHX_ const char *s, bool strict,
24 Perl_prescan_version(pTHX_ const char *s, bool strict,
27 bool *sqv, int *ssaw_decimal, int *swidth, bool *salpha) {
28 bool qv = (sqv ? *sqv : FALSE);
34 PERL_ARGS_ASSERT_PRESCAN_VERSION;
37 if (qv && isDIGIT(*d))
38 goto dotted_decimal_version;
40 if (*d == 'v') { /* explicit v-string */
45 else { /* degenerate v-string */
47 BADVERSION(s,errstr,"Invalid version format (dotted-decimal versions require at least three parts)");
50 dotted_decimal_version:
51 if (strict && d[0] == '0' && isDIGIT(d[1])) {
52 /* no leading zeros allowed */
53 BADVERSION(s,errstr,"Invalid version format (no leading zeros)");
56 while (isDIGIT(*d)) /* integer part */
62 d++; /* decimal point */
68 BADVERSION(s,errstr,"Invalid version format (dotted-decimal versions require at least three parts)");
71 goto version_prescan_finish;
78 while (isDIGIT(*d)) { /* just keep reading */
82 /* maximum 3 digits between decimal */
83 if (strict && j > 3) {
84 BADVERSION(s,errstr,"Invalid version format (maximum 3 digits between decimals)");
89 BADVERSION(s,errstr,"Invalid version format (no underscores)");
92 BADVERSION(s,errstr,"Invalid version format (multiple underscores)");
99 BADVERSION(s,errstr,"Invalid version format (underscores before decimal)");
104 else if (!isDIGIT(*d)) {
110 if (strict && i < 2) {
111 /* requires v1.2.3 */
112 BADVERSION(s,errstr,"Invalid version format (dotted-decimal versions require at least three parts)");
115 } /* end if dotted-decimal */
117 { /* decimal versions */
118 int j = 0; /* may need this later */
119 /* special strict case for leading '.' or '0' */
122 BADVERSION(s,errstr,"Invalid version format (0 before decimal required)");
124 if (*d == '0' && isDIGIT(d[1])) {
125 BADVERSION(s,errstr,"Invalid version format (no leading zeros)");
129 /* and we never support negative versions */
131 BADVERSION(s,errstr,"Invalid version format (negative version number)");
134 /* consume all of the integer part */
138 /* look for a fractional part */
140 /* we found it, so consume it */
144 else if (!*d || *d == ';' || isSPACE(*d) || *d == '{' || *d == '}') {
147 BADVERSION(s,errstr,"Invalid version format (version required)");
149 /* found just an integer */
150 goto version_prescan_finish;
153 /* didn't find either integer or period */
154 BADVERSION(s,errstr,"Invalid version format (non-numeric data)");
156 else if (*d == '_') {
157 /* underscore can't come after integer part */
159 BADVERSION(s,errstr,"Invalid version format (no underscores)");
161 else if (isDIGIT(d[1])) {
162 BADVERSION(s,errstr,"Invalid version format (alpha without decimal)");
165 BADVERSION(s,errstr,"Invalid version format (misplaced underscore)");
169 /* anything else after integer part is just invalid data */
170 BADVERSION(s,errstr,"Invalid version format (non-numeric data)");
173 /* scan the fractional part after the decimal point*/
175 if (!isDIGIT(*d) && (strict || ! (!*d || *d == ';' || isSPACE(*d) || *d == '{' || *d == '}') )) {
176 /* strict or lax-but-not-the-end */
177 BADVERSION(s,errstr,"Invalid version format (fractional part required)");
180 while (isDIGIT(*d)) {
182 if (*d == '.' && isDIGIT(d[-1])) {
184 BADVERSION(s,errstr,"Invalid version format (underscores before decimal)");
187 BADVERSION(s,errstr,"Invalid version format (dotted-decimal versions must begin with 'v')");
189 d = (char *)s; /* start all over again */
191 goto dotted_decimal_version;
195 BADVERSION(s,errstr,"Invalid version format (no underscores)");
198 BADVERSION(s,errstr,"Invalid version format (multiple underscores)");
200 if ( ! isDIGIT(d[1]) ) {
201 BADVERSION(s,errstr,"Invalid version format (misplaced underscore)");
210 version_prescan_finish:
214 if (!isDIGIT(*d) && (! (!*d || *d == ';' || *d == '{' || *d == '}') )) {
215 /* trailing non-numeric data */
216 BADVERSION(s,errstr,"Invalid version format (non-numeric data)");
218 if (saw_decimal > 1 && d[-1] == '.') {
219 /* no trailing period allowed */
220 BADVERSION(s,errstr,"Invalid version format (trailing decimal)");
229 *ssaw_decimal = saw_decimal;
236 =for apidoc scan_version
238 Returns a pointer to the next character after the parsed
239 version string, as well as upgrading the passed in SV to
242 Function must be called with an already existing SV like
245 s = scan_version(s, SV *sv, bool qv);
247 Performs some preprocessing to the string to ensure that
248 it has the correct characteristics of a version. Flags the
249 object if it contains an underscore (which denotes this
250 is an alpha version). The boolean qv denotes that the version
251 should be interpreted as if it had multiple decimals, even if
258 #ifdef VUTIL_REPLACE_CORE
259 Perl_scan_version2(pTHX_ const char *s, SV *rv, bool qv)
261 Perl_scan_version(pTHX_ const char *s, SV *rv, bool qv)
264 const char *start = s;
267 const char *errstr = NULL;
275 PERL_ARGS_ASSERT_SCAN_VERSION;
277 while (isSPACE(*s)) /* leading whitespace is OK */
280 last = PRESCAN_VERSION(s, FALSE, &errstr, &qv, &saw_decimal, &width, &alpha);
282 /* "undef" is a special case and not an error */
283 if ( ! ( *s == 'u' && strEQ(s+1,"ndef")) ) {
284 Perl_croak(aTHX_ "%s", errstr);
293 /* Now that we are through the prescan, start creating the object */
295 hv = newSVrv(rv, "version"); /* create an SV and upgrade the RV */
296 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
298 #ifndef NODEFAULT_SHAREKEYS
299 HvSHAREKEYS_on(hv); /* key-sharing on by default */
303 (void)hv_stores(MUTABLE_HV(hv), "qv", newSViv(qv));
305 (void)hv_stores(MUTABLE_HV(hv), "alpha", newSViv(alpha));
306 if ( !qv && width < 3 )
307 (void)hv_stores(MUTABLE_HV(hv), "width", newSViv(width));
309 while (isDIGIT(*pos) || *pos == '_')
311 if (!isALPHA(*pos)) {
317 /* this is atoi() that delimits on underscores */
318 const char *end = pos;
322 /* the following if() will only be true after the decimal
323 * point of a version originally created with a bare
324 * floating point number, i.e. not quoted in any way
326 if ( !qv && s > start && saw_decimal == 1 ) {
332 rev += (*s - '0') * mult;
334 if ( (PERL_ABS(orev) > PERL_ABS(rev))
335 || (PERL_ABS(rev) > VERSION_MAX )) {
336 Perl_ck_warner(aTHX_ packWARN(WARN_OVERFLOW),
337 "Integer overflow in version %d",VERSION_MAX);
353 if ( (mult == VERSION_MAX)
354 || (i > VERSION_MAX / mult)
355 || (i * mult > VERSION_MAX - rev))
357 Perl_ck_warner(aTHX_ packWARN(WARN_OVERFLOW),
358 "Integer overflow in version");
366 if (mult > VERSION_MAX / 10)
374 /* Append revision */
375 av_push(av, newSViv(rev));
380 else if ( *pos == '.' ) {
388 else if ( *pos == '_' && isDIGIT(pos[1]) )
390 else if ( *pos == ',' && isDIGIT(pos[1]) )
392 else if ( isDIGIT(*pos) )
399 while ( isDIGIT(*pos) || *pos == '_')
404 while ( ( isDIGIT(*pos) || *pos == '_' ) && digits < 3 ) {
412 if ( qv ) { /* quoted versions always get at least three terms*/
413 SSize_t len = AvFILLp(av);
414 /* This for loop appears to trigger a compiler bug on OS X, as it
415 loops infinitely. Yes, len is negative. No, it makes no sense.
416 Compiler in question is:
417 gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)
418 for ( len = 2 - len; len > 0; len-- )
419 av_push(MUTABLE_AV(sv), newSViv(0));
423 av_push(av, newSViv(0));
426 /* need to save off the current version string for later */
428 SV * orig = newSVpvn("v.Inf", sizeof("v.Inf")-1);
429 (void)hv_stores(MUTABLE_HV(hv), "original", orig);
430 (void)hv_stores(MUTABLE_HV(hv), "vinf", newSViv(1));
432 else if ( s > start ) {
433 SV * orig = newSVpvn(start,s-start);
434 if ( qv && saw_decimal == 1 && *start != 'v' ) {
435 /* need to insert a v to be consistent */
436 sv_insert(orig, 0, 0, "v", 1);
438 (void)hv_stores(MUTABLE_HV(hv), "original", orig);
441 (void)hv_stores(MUTABLE_HV(hv), "original", newSVpvs("0"));
442 av_push(av, newSViv(0));
445 /* And finally, store the AV in the hash */
446 (void)hv_stores(MUTABLE_HV(hv), "version", newRV_noinc(MUTABLE_SV(av)));
448 /* fix RT#19517 - special case 'undef' as string */
449 if ( *s == 'u' && strEQ(s+1,"ndef") ) {
457 =for apidoc new_version
459 Returns a new version object based on the passed in SV:
461 SV *sv = new_version(SV *ver);
463 Does not alter the passed in ver SV. See "upg_version" if you
464 want to upgrade the SV.
470 #ifdef VUTIL_REPLACE_CORE
471 Perl_new_version2(pTHX_ SV *ver)
473 Perl_new_version(pTHX_ SV *ver)
476 SV * const rv = newSV(0);
477 PERL_ARGS_ASSERT_NEW_VERSION;
478 if ( ISA_VERSION_OBJ(ver) ) /* can just copy directly */
481 AV * const av = newAV();
483 /* This will get reblessed later if a derived class*/
484 SV * const hv = newSVrv(rv, "version");
485 (void)sv_upgrade(hv, SVt_PVHV); /* needs to be an HV type */
486 #ifndef NODEFAULT_SHAREKEYS
487 HvSHAREKEYS_on(hv); /* key-sharing on by default */
493 /* Begin copying all of the elements */
494 if ( hv_exists(MUTABLE_HV(ver), "qv", 2) )
495 (void)hv_stores(MUTABLE_HV(hv), "qv", newSViv(1));
497 if ( hv_exists(MUTABLE_HV(ver), "alpha", 5) )
498 (void)hv_stores(MUTABLE_HV(hv), "alpha", newSViv(1));
500 SV ** svp = hv_fetchs(MUTABLE_HV(ver), "width", FALSE);
502 const I32 width = SvIV(*svp);
503 (void)hv_stores(MUTABLE_HV(hv), "width", newSViv(width));
507 SV ** svp = hv_fetchs(MUTABLE_HV(ver), "original", FALSE);
509 (void)hv_stores(MUTABLE_HV(hv), "original", newSVsv(*svp));
511 sav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(ver), "version", FALSE)));
512 /* This will get reblessed later if a derived class*/
513 for ( key = 0; key <= av_len(sav); key++ )
515 SV * const sv = *av_fetch(sav, key, FALSE);
516 const I32 rev = SvIV(sv);
517 av_push(av, newSViv(rev));
520 (void)hv_stores(MUTABLE_HV(hv), "version", newRV_noinc(MUTABLE_SV(av)));
525 const MAGIC* const mg = SvVSTRING_mg(ver);
526 if ( mg ) { /* already a v-string */
527 const STRLEN len = mg->mg_len;
528 const char * const version = (const char*)mg->mg_ptr;
530 static const char underscore[] = "_";
531 sv_setpvn(rv,version,len);
532 raw = SvPV_nolen(rv);
533 under = ninstr(raw, raw+len, underscore, underscore + 1);
535 Move(under + 1, under, raw + len - under - 1, char);
536 SvCUR_set(rv, SvCUR(rv) - 1);
539 /* this is for consistency with the pure Perl class */
540 if ( isDIGIT(*version) )
541 sv_insert(rv, 0, 0, "v", 1);
545 SvSetSV_nosteal(rv, ver); /* make a duplicate */
550 sv_2mortal(rv); /* in case upg_version croaks before it returns */
551 return SvREFCNT_inc_NN(UPG_VERSION(rv, FALSE));
555 =for apidoc upg_version
557 In-place upgrade of the supplied SV to a version object.
559 SV *sv = upg_version(SV *sv, bool qv);
561 Returns a pointer to the upgraded SV. Set the boolean qv if you want
562 to force this SV to be interpreted as an "extended" version.
568 #ifdef VUTIL_REPLACE_CORE
569 Perl_upg_version2(pTHX_ SV *ver, bool qv)
571 Perl_upg_version(pTHX_ SV *ver, bool qv)
574 const char *version, *s;
579 #if PERL_VERSION_LT(5,19,8) && defined(USE_ITHREADS)
582 PERL_ARGS_ASSERT_UPG_VERSION;
584 if ( (SvUOK(ver) && SvUVX(ver) > VERSION_MAX)
585 || (SvIOK(ver) && SvIVX(ver) > VERSION_MAX) ) {
586 /* out of bounds [unsigned] integer */
589 len = my_snprintf(tbuf, sizeof(tbuf), "%d", VERSION_MAX);
590 version = savepvn(tbuf, len);
592 Perl_ck_warner(aTHX_ packWARN(WARN_OVERFLOW),
593 "Integer overflow in version %d",VERSION_MAX);
595 else if ( SvUOK(ver) || SvIOK(ver))
596 #if PERL_VERSION_LT(5,17,2)
600 version = savesvpv(ver);
603 else if (SvNOK(ver) && !( SvPOK(ver) && SvCUR(ver) == 3 ) )
604 #if PERL_VERSION_LT(5,17,2)
610 /* may get too much accuracy */
612 SV *sv = SvNVX(ver) > 10e50 ? newSV(64) : 0;
615 #if PERL_VERSION_GE(5,19,0)
621 #ifdef USE_LOCALE_NUMERIC
624 /* This may or may not be called from code that has switched
625 * locales without letting perl know, therefore we have to find it
626 * from first principals. See [perl #121930]. */
628 /* In windows, or not threaded, or not thread-safe, if it isn't C,
631 # ifndef USE_POSIX_2008_LOCALE
633 const char * locale_name_on_entry;
635 LC_NUMERIC_LOCK(0); /* Start critical section */
637 locale_name_on_entry = setlocale(LC_NUMERIC, NULL);
638 if ( strNE(locale_name_on_entry, "C")
639 && strNE(locale_name_on_entry, "POSIX"))
641 /* the setlocale() call might free or overwrite the name */
642 locale_name_on_entry = savepv(locale_name_on_entry);
643 setlocale(LC_NUMERIC, "C");
645 else { /* This value indicates to the restore code that we didn't
647 locale_name_on_entry = NULL;
652 const locale_t locale_obj_on_entry = uselocale((locale_t) 0);
653 const char * locale_name_on_entry = NULL;
654 DECLARATION_FOR_LC_NUMERIC_MANIPULATION;
656 if (locale_obj_on_entry == LC_GLOBAL_LOCALE) {
658 /* in the global locale, we can call system setlocale and if it
659 * isn't C, set it to C. */
662 locale_name_on_entry = setlocale(LC_NUMERIC, NULL);
663 if ( strNE(locale_name_on_entry, "C")
664 && strNE(locale_name_on_entry, "POSIX"))
666 /* the setlocale() call might free or overwrite the name */
667 locale_name_on_entry = savepv(locale_name_on_entry);
668 setlocale(LC_NUMERIC, "C");
670 else { /* This value indicates to the restore code that we
671 didn't change the locale */
672 locale_name_on_entry = NULL;
675 else if (locale_obj_on_entry == PL_underlying_numeric_obj) {
676 /* Here, the locale appears to have been changed to use the
677 * program's underlying locale. Just use our mechanisms to
678 * switch back to C. It might be possible for this pointer to
679 * actually refer to something else if it got released and
680 * reused somehow. But it doesn't matter, our mechanisms will
682 STORE_LC_NUMERIC_SET_STANDARD();
684 else if (locale_obj_on_entry != PL_C_locale_obj) {
685 /* The C object should be unchanged during a program's
686 * execution, so it should be safe to assume it means what it
687 * says, so if we are in it, no locale change is required.
688 * Otherwise, simply use the thread-safe operation. */
689 uselocale(PL_C_locale_obj);
694 /* Prevent recursed calls from trying to change back */
695 LOCK_LC_NUMERIC_STANDARD();
700 Perl_sv_setpvf(aTHX_ sv, "%.9" NVff, SvNVX(ver));
705 len = my_snprintf(tbuf, sizeof(tbuf), "%.9" NVff, SvNVX(ver));
709 #ifdef USE_LOCALE_NUMERIC
711 UNLOCK_LC_NUMERIC_STANDARD();
713 # ifndef USE_POSIX_2008_LOCALE
715 if (locale_name_on_entry) {
716 setlocale(LC_NUMERIC, locale_name_on_entry);
717 Safefree(locale_name_on_entry);
720 LC_NUMERIC_UNLOCK; /* End critical section */
724 if (locale_name_on_entry) {
725 setlocale(LC_NUMERIC, locale_name_on_entry);
726 Safefree(locale_name_on_entry);
729 else if (locale_obj_on_entry == PL_underlying_numeric_obj) {
730 RESTORE_LC_NUMERIC();
732 else if (locale_obj_on_entry != PL_C_locale_obj) {
733 uselocale(locale_obj_on_entry);
740 #endif /* USE_LOCALE_NUMERIC */
742 while (buf[len-1] == '0' && len > 0) len--;
743 if ( buf[len-1] == '.' ) len--; /* eat the trailing decimal */
744 version = savepvn(buf, len);
749 else if ( (mg = SvVSTRING_mg(ver)) ) { /* already a v-string */
750 version = savepvn( (const char*)mg->mg_ptr,mg->mg_len );
755 else if ( SvPOK(ver))/* must be a string or something like a string */
759 version = savepvn(SvPV(ver,len), SvCUR(ver));
762 /* This will only be executed for 5.6.0 - 5.8.0 inclusive */
763 if ( len >= 3 && !instr(version,".") && !instr(version,"_")) {
764 /* may be a v-string */
765 char *testv = (char *)version;
767 for (tlen=0; tlen < len; tlen++, testv++) {
768 /* if one of the characters is non-text assume v-string */
769 if (testv[0] < ' ') {
770 SV * const nsv = sv_newmortal();
774 sv_setpvf(nsv,"v%vd",ver);
775 pos = nver = savepv(SvPV_nolen(nsv));
778 /* scan the resulting formatted string */
779 pos++; /* skip the leading 'v' */
780 while ( *pos == '.' || isDIGIT(*pos) ) {
786 /* is definitely a v-string */
787 if ( saw_decimal >= 2 ) {
796 #if PERL_VERSION_LT(5,17,2)
797 else if (SvIOKp(ver)) {
800 else if (SvNOKp(ver)) {
803 else if (SvPOKp(ver)) {
809 /* no idea what this is */
810 Perl_croak(aTHX_ "Invalid version format (non-numeric data)");
813 s = SCAN_VERSION(version, ver, qv);
815 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
816 "Version string '%s' contains invalid data; "
817 "ignoring: '%s'", version, s);
819 #if PERL_VERSION_LT(5,19,8) && defined(USE_ITHREADS)
829 Validates that the SV contains valid internal structure for a version object.
830 It may be passed either the version object (RV) or the hash itself (HV). If
831 the structure is valid, it returns the HV. If the structure is invalid,
834 SV *hv = vverify(sv);
836 Note that it only confirms the bare minimum structure (so as not to get
837 confused by derived classes which may contain additional hash entries):
841 =item * The SV is an HV or a reference to an HV
843 =item * The hash contains a "version" key
845 =item * The "version" key has a reference to an AV as its value
853 #ifdef VUTIL_REPLACE_CORE
854 Perl_vverify2(pTHX_ SV *vs)
856 Perl_vverify(pTHX_ SV *vs)
862 PERL_ARGS_ASSERT_VVERIFY;
867 /* see if the appropriate elements exist */
868 if ( SvTYPE(vs) == SVt_PVHV
869 && (svp = hv_fetchs(MUTABLE_HV(vs), "version", FALSE))
871 && SvTYPE(sv) == SVt_PVAV )
880 Accepts a version object and returns the normalized floating
881 point representation. Call like:
885 NOTE: you can pass either the object directly or the SV
886 contained within the RV.
888 The SV returned has a refcount of 1.
894 #ifdef VUTIL_REPLACE_CORE
895 Perl_vnumify2(pTHX_ SV *vs)
897 Perl_vnumify(pTHX_ SV *vs)
906 PERL_ARGS_ASSERT_VNUMIFY;
908 /* extract the HV from the object */
911 Perl_croak(aTHX_ "Invalid version object");
913 /* see if various flags exist */
914 if ( hv_exists(MUTABLE_HV(vs), "alpha", 5 ) )
918 Perl_ck_warner(aTHX_ packWARN(WARN_NUMERIC),
919 "alpha->numify() is lossy");
922 /* attempt to retrieve the version array */
923 if ( !(av = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(vs), "version", FALSE))) ) ) {
924 return newSVpvs("0");
930 return newSVpvs("0");
934 SV * tsv = *av_fetch(av, 0, 0);
937 sv = Perl_newSVpvf(aTHX_ "%d.", (int)PERL_ABS(digit));
938 for ( i = 1 ; i <= len ; i++ )
940 SV * tsv = *av_fetch(av, i, 0);
942 Perl_sv_catpvf(aTHX_ sv, "%03d", (int)digit);
946 sv_catpvs(sv, "000");
954 Accepts a version object and returns the normalized string
955 representation. Call like:
959 NOTE: you can pass either the object directly or the SV
960 contained within the RV.
962 The SV returned has a refcount of 1.
968 #ifdef VUTIL_REPLACE_CORE
969 Perl_vnormal2(pTHX_ SV *vs)
971 Perl_vnormal(pTHX_ SV *vs)
978 PERL_ARGS_ASSERT_VNORMAL;
980 /* extract the HV from the object */
983 Perl_croak(aTHX_ "Invalid version object");
985 av = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(vs), "version", FALSE)));
993 SV * tsv = *av_fetch(av, 0, 0);
996 sv = Perl_newSVpvf(aTHX_ "v%" IVdf, (IV)digit);
997 for ( i = 1 ; i <= len ; i++ ) {
998 SV * tsv = *av_fetch(av, i, 0);
1000 Perl_sv_catpvf(aTHX_ sv, ".%" IVdf, (IV)digit);
1003 if ( len <= 2 ) { /* short version, must be at least three */
1004 for ( len = 2 - len; len != 0; len-- )
1011 =for apidoc vstringify
1013 In order to maintain maximum compatibility with earlier versions
1014 of Perl, this function will return either the floating point
1015 notation or the multiple dotted notation, depending on whether
1016 the original version contained 1 or more dots, respectively.
1018 The SV returned has a refcount of 1.
1024 #ifdef VUTIL_REPLACE_CORE
1025 Perl_vstringify2(pTHX_ SV *vs)
1027 Perl_vstringify(pTHX_ SV *vs)
1031 PERL_ARGS_ASSERT_VSTRINGIFY;
1033 /* extract the HV from the object */
1036 Perl_croak(aTHX_ "Invalid version object");
1038 svp = hv_fetchs(MUTABLE_HV(vs), "original", FALSE);
1043 #if PERL_VERSION_LT(5,17,2)
1049 return &PL_sv_undef;
1052 if ( hv_exists(MUTABLE_HV(vs), "qv", 2) )
1062 Version object aware cmp. Both operands must already have been
1063 converted into version objects.
1069 #ifdef VUTIL_REPLACE_CORE
1070 Perl_vcmp2(pTHX_ SV *lhv, SV *rhv)
1072 Perl_vcmp(pTHX_ SV *lhv, SV *rhv)
1081 PERL_ARGS_ASSERT_VCMP;
1083 /* extract the HVs from the objects */
1086 if ( ! ( lhv && rhv ) )
1087 Perl_croak(aTHX_ "Invalid version object");
1089 /* get the left hand term */
1090 lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(lhv), "version", FALSE)));
1092 /* and the right hand term */
1093 rav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(rhv), "version", FALSE)));
1100 while ( i <= m && retval == 0 )
1102 SV * const lsv = *av_fetch(lav,i,0);
1105 rsv = *av_fetch(rav,i,0);
1114 if ( l != r && retval == 0 ) /* possible match except for trailing 0's */
1118 while ( i <= r && retval == 0 )
1120 SV * const rsv = *av_fetch(rav,i,0);
1121 if ( SvIV(rsv) != 0 )
1122 retval = -1; /* not a match after all */
1128 while ( i <= l && retval == 0 )
1130 SV * const lsv = *av_fetch(lav,i,0);
1131 if ( SvIV(lsv) != 0 )
1132 retval = +1; /* not a match after all */