/* sv.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
+ * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall
+ * and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
=cut
-============================================================================ */
+ * ========================================================================= */
/*
* "A time to plant, and a time to uproot what was planted..."
allocate body types with "ghost fields".
"ghost fields" are fields that are unused in certain types, and
-consequently dont need to actually exist. They are declared because
+consequently don't need to actually exist. They are declared because
they're part of a "base type", which allows use of functions as
methods. The simplest examples are AVs and HVs, 2 aggregate types
which don't use the fields which support SCALAR semantics.
-For these types, the arenas are carved up into *_allocated size
+For these types, the arenas are carved up into appropriately sized
chunks, we thus avoid wasted memory for those unaccessed members.
When bodies are allocated, we adjust the pointer back in memory by the
-size of the bit not allocated, so it's as if we allocated the full
+size of the part not allocated, so it's as if we allocated the full
structure. (But things will all go boom if you write to the part that
is "not there", because you'll be overwriting the last members of the
preceding structure in memory.)
-We calculate the correction using the STRUCT_OFFSET macro. For
-example, if xpv_allocated is the same structure as XPV then the two
-OFFSETs sum to zero, and the pointer is unchanged. If the allocated
-structure is smaller (no initial NV actually allocated) then the net
-effect is to subtract the size of the NV from the pointer, to return a
-new pointer as if an initial NV were actually allocated.
+We calculate the correction using the STRUCT_OFFSET macro on the first
+member present. If the allocated structure is smaller (no initial NV
+actually allocated) then the net effect is to subtract the size of the NV
+from the pointer, to return a new pointer as if an initial NV were actually
+allocated. (We were using structures named *_allocated for this, but
+this turned out to be a subtle bug, because a structure without an NV
+could have a lower alignment constraint, but the compiler is allowed to
+optimised accesses based on the alignment constraint of the actual pointer
+to the full structure, for example, using a single 64 bit load instruction
+because it "knows" that two adjacent 32 bit members will be 8-byte aligned.)
This is the same trick as was used for NV and IV bodies. Ironically it
doesn't need to be used for NV bodies any more, because NV is now at
Body_size determines how big a body is, and therefore how many fit into
each arena. Offset carries the body-pointer adjustment needed for
-*_allocated body types, and is used in *_allocated macros.
+"ghost fields", and is used in *_allocated macros.
But its main purpose is to parameterize info needed in
Perl_sv_upgrade(). The info here dramatically simplifies the function
-vs the implementation in 5.8.7, making it table-driven. All fields
+vs the implementation in 5.8.8, making it table-driven. All fields
are used for this, except for arena_size.
For the sv-types that have no bodies, arenas are not used, so those
? FIT_ARENAn (count, body_size) \
: FIT_ARENA0 (body_size)
-/* A macro to work out the offset needed to subtract from a pointer to (say)
-
-typedef struct {
- STRLEN xpv_cur;
- STRLEN xpv_len;
-} xpv_allocated;
-
-to make its members accessible via a pointer to (say)
-
-struct xpv {
- NV xnv_nv;
- STRLEN xpv_cur;
- STRLEN xpv_len;
-};
-
-*/
-
-#define relative_STRUCT_OFFSET(longer, shorter, member) \
- (STRUCT_OFFSET(shorter, member) - STRUCT_OFFSET(longer, member))
-
/* Calculate the length to copy. Specifically work out the length less any
final padding the compiler needed to add. See the comment in sv_upgrade
for why copying the padding proved to be a bug. */
FIT_ARENA(0, sizeof(NV)) },
/* 8 bytes on most ILP32 with IEEE doubles */
- { sizeof(xpv_allocated),
- copy_length(XPV, xpv_len)
- - relative_STRUCT_OFFSET(xpv_allocated, XPV, xpv_cur),
- + relative_STRUCT_OFFSET(xpv_allocated, XPV, xpv_cur),
- SVt_PV, FALSE, NONV, HASARENA, FIT_ARENA(0, sizeof(xpv_allocated)) },
+ { sizeof(XPV) - STRUCT_OFFSET(XPV, xpv_cur),
+ copy_length(XPV, xpv_len) - STRUCT_OFFSET(XPV, xpv_cur),
+ + STRUCT_OFFSET(XPV, xpv_cur),
+ SVt_PV, FALSE, NONV, HASARENA,
+ FIT_ARENA(0, sizeof(XPV) - STRUCT_OFFSET(XPV, xpv_cur)) },
/* 12 */
- { sizeof(xpviv_allocated),
- copy_length(XPVIV, xiv_u)
- - relative_STRUCT_OFFSET(xpviv_allocated, XPVIV, xpv_cur),
- + relative_STRUCT_OFFSET(xpviv_allocated, XPVIV, xpv_cur),
- SVt_PVIV, FALSE, NONV, HASARENA, FIT_ARENA(0, sizeof(xpviv_allocated)) },
+ { sizeof(XPVIV) - STRUCT_OFFSET(XPV, xpv_cur),
+ copy_length(XPVIV, xiv_u) - STRUCT_OFFSET(XPV, xpv_cur),
+ + STRUCT_OFFSET(XPVIV, xpv_cur),
+ SVt_PVIV, FALSE, NONV, HASARENA,
+ FIT_ARENA(0, sizeof(XPV) - STRUCT_OFFSET(XPV, xpv_cur)) },
/* 20 */
{ sizeof(XPVNV), copy_length(XPVNV, xiv_u), 0, SVt_PVNV, FALSE, HADNV,
HASARENA, FIT_ARENA(0, sizeof(XPVMG)) },
/* something big */
- { sizeof(struct regexp_allocated), sizeof(struct regexp_allocated),
- + relative_STRUCT_OFFSET(struct regexp_allocated, regexp, xpv_cur),
+ { sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur),
+ sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur),
+ + STRUCT_OFFSET(regexp, xpv_cur),
SVt_REGEXP, FALSE, NONV, HASARENA,
- FIT_ARENA(0, sizeof(struct regexp_allocated))
+ FIT_ARENA(0, sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur))
},
/* 48 */
{ sizeof(XPVLV), sizeof(XPVLV), 0, SVt_PVLV, TRUE, HADNV,
HASARENA, FIT_ARENA(0, sizeof(XPVLV)) },
- { sizeof(xpvav_allocated),
- copy_length(XPVAV, xmg_stash)
- - relative_STRUCT_OFFSET(xpvav_allocated, XPVAV, xav_fill),
- + relative_STRUCT_OFFSET(xpvav_allocated, XPVAV, xav_fill),
- SVt_PVAV, TRUE, NONV, HASARENA, FIT_ARENA(0, sizeof(xpvav_allocated)) },
+ { sizeof(XPVAV) - STRUCT_OFFSET(XPVAV, xav_fill),
+ copy_length(XPVAV, xmg_stash) - STRUCT_OFFSET(XPVAV, xav_fill),
+ + STRUCT_OFFSET(XPVAV, xav_fill),
+ SVt_PVAV, TRUE, NONV, HASARENA,
+ FIT_ARENA(0, sizeof(XPVAV) - STRUCT_OFFSET(XPVAV, xav_fill)) },
- { sizeof(xpvhv_allocated),
- copy_length(XPVHV, xmg_stash)
- - relative_STRUCT_OFFSET(xpvhv_allocated, XPVHV, xhv_fill),
- + relative_STRUCT_OFFSET(xpvhv_allocated, XPVHV, xhv_fill),
- SVt_PVHV, TRUE, NONV, HASARENA, FIT_ARENA(0, sizeof(xpvhv_allocated)) },
+ { sizeof(XPVHV) - STRUCT_OFFSET(XPVHV, xhv_fill),
+ copy_length(XPVHV, xmg_stash) - STRUCT_OFFSET(XPVHV, xhv_fill),
+ + STRUCT_OFFSET(XPVHV, xhv_fill),
+ SVt_PVHV, TRUE, NONV, HASARENA,
+ FIT_ARENA(0, sizeof(XPVHV) - STRUCT_OFFSET(XPVHV, xhv_fill)) },
/* 56 */
- { sizeof(xpvcv_allocated), sizeof(xpvcv_allocated),
- + relative_STRUCT_OFFSET(xpvcv_allocated, XPVCV, xpv_cur),
- SVt_PVCV, TRUE, NONV, HASARENA, FIT_ARENA(0, sizeof(xpvcv_allocated)) },
-
- { sizeof(xpvfm_allocated), sizeof(xpvfm_allocated),
- + relative_STRUCT_OFFSET(xpvfm_allocated, XPVFM, xpv_cur),
- SVt_PVFM, TRUE, NONV, NOARENA, FIT_ARENA(20, sizeof(xpvfm_allocated)) },
+ { sizeof(XPVCV) - STRUCT_OFFSET(XPVCV, xpv_cur),
+ sizeof(XPVCV) - STRUCT_OFFSET(XPVCV, xpv_cur),
+ + STRUCT_OFFSET(XPVCV, xpv_cur),
+ SVt_PVCV, TRUE, NONV, HASARENA,
+ FIT_ARENA(0, sizeof(XPVCV) - STRUCT_OFFSET(XPVCV, xpv_cur)) },
+
+ { sizeof(XPVFM) - STRUCT_OFFSET(XPVFM, xpv_cur),
+ sizeof(XPVFM) - STRUCT_OFFSET(XPVFM, xpv_cur),
+ + STRUCT_OFFSET(XPVFM, xpv_cur),
+ SVt_PVFM, TRUE, NONV, NOARENA,
+ FIT_ARENA(20, sizeof(XPVFM) - STRUCT_OFFSET(XPVFM, xpv_cur)) },
/* XPVIO is 84 bytes, fits 48x */
- { sizeof(xpvio_allocated), sizeof(xpvio_allocated),
- + relative_STRUCT_OFFSET(xpvio_allocated, XPVIO, xpv_cur),
- SVt_PVIO, TRUE, NONV, HASARENA, FIT_ARENA(24, sizeof(xpvio_allocated)) },
+ { sizeof(XPVIO) - STRUCT_OFFSET(XPVIO, xpv_cur),
+ sizeof(XPVIO) - STRUCT_OFFSET(XPVIO, xpv_cur),
+ + STRUCT_OFFSET(XPVIO, xpv_cur),
+ SVt_PVIO, TRUE, NONV, HASARENA,
+ FIT_ARENA(24, sizeof(XPVIO) - STRUCT_OFFSET(XPVIO, xpv_cur)) },
};
#define new_body_type(sv_type) \
PERL_ARGS_ASSERT_SV_UPGRADE;
+ if (old_type == new_type)
+ return;
+
+ /* This clause was purposefully added ahead of the early return above to
+ the shared string hackery for (sort {$a <=> $b} keys %hash), with the
+ inference by Nick I-S that it would fix other troublesome cases. See
+ changes 7162, 7163 (f130fd4589cf5fbb24149cd4db4137c8326f49c1 and parent)
+
+ Given that shared hash key scalars are no longer PVIV, but PV, there is
+ no longer need to unshare so as to free up the IVX slot for its proper
+ purpose. So it's safe to move the early return earlier. */
+
if (new_type != SVt_PV && SvIsCOW(sv)) {
sv_force_normal_flags(sv, 0);
}
- if (old_type == new_type)
- return;
-
old_body = SvANY(sv);
/* Copying structures onto other structures that have been neatly zeroed
SvNV_set(sv, 0);
#endif
- if (new_type == SVt_PVIO)
+ if (new_type == SVt_PVIO) {
+ IO * const io = MUTABLE_IO(sv);
+ GV *iogv = gv_fetchpvs("FileHandle::", 0, SVt_PVHV);
+
+ SvOBJECT_on(io);
+ /* Clear the stashcache because a new IO could overrule a package
+ name */
+ hv_clear(PL_stashcache);
+
+ /* unless exists($main::{FileHandle}) and
+ defined(%main::FileHandle::) */
+ if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv))))
+ iogv = gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVHV);
+ SvSTASH_set(io, MUTABLE_HV(SvREFCNT_inc(GvHV(iogv))));
IoPAGE_LEN(sv) = 60;
+ }
if (old_type < SVt_PV) {
/* referant will be NULL unless the old type was SVt_IV emulating
SVt_RV */
return TRUE;
}
-STATIC char *
-S_glob_2pv(pTHX_ GV * const gv, STRLEN * const len)
-{
- const U32 wasfake = SvFLAGS(gv) & SVf_FAKE;
- SV *const buffer = sv_newmortal();
-
- PERL_ARGS_ASSERT_GLOB_2PV;
-
- /* FAKE globs can get coerced, so need to turn this off temporarily if it
- is on. */
- SvFAKE_off(gv);
- gv_efullname3(buffer, gv, "*");
- SvFLAGS(gv) |= wasfake;
-
- assert(SvPOK(buffer));
- if (len) {
- *len = SvCUR(buffer);
- }
- return SvPVX(buffer);
-}
-
/* Actually, ISO C leaves conversion of UV to IV undefined, but
until proven guilty, assume that things are not that bad... */
#endif
}
else {
- if (isGV_with_GP(sv))
- return glob_2pv(MUTABLE_GV(sv), lp);
+ if (isGV_with_GP(sv)) {
+ GV *const gv = MUTABLE_GV(sv);
+ const U32 wasfake = SvFLAGS(gv) & SVf_FAKE;
+ SV *const buffer = sv_newmortal();
+
+ /* FAKE globs can get coerced, so need to turn this off temporarily
+ if it is on. */
+ SvFAKE_off(gv);
+ gv_efullname3(buffer, gv, "*");
+ SvFLAGS(gv) |= wasfake;
+
+ assert(SvPOK(buffer));
+ if (lp) {
+ *lp = SvCUR(buffer);
+ }
+ return SvPVX(buffer);
+ }
if (lp)
*lp = 0;
Converts the PV of an SV to its UTF-8-encoded form.
Forces the SV to string form if it is not already.
+Will C<mg_get> on C<sv> if appropriate.
Always sets the SvUTF8 flag to avoid future validity checks even
-if all the bytes have hibit clear.
+if the whole string is the same in UTF-8 as not.
+Returns the number of bytes in the converted string
This is not as a general purpose byte encoding to Unicode interface:
use the Encode extension for that.
+=for apidoc sv_utf8_upgrade_nomg
+
+Like sv_utf8_upgrade, but doesn't do magic on C<sv>
+
=for apidoc sv_utf8_upgrade_flags
Converts the PV of an SV to its UTF-8-encoded form.
Forces the SV to string form if it is not already.
Always sets the SvUTF8 flag to avoid future validity checks even
-if all the bytes have hibit clear. If C<flags> has C<SV_GMAGIC> bit set,
-will C<mg_get> on C<sv> if appropriate, else not. C<sv_utf8_upgrade> and
+if all the bytes are invariant in UTF-8. If C<flags> has C<SV_GMAGIC> bit set,
+will C<mg_get> on C<sv> if appropriate, else not.
+Returns the number of bytes in the converted string
+C<sv_utf8_upgrade> and
C<sv_utf8_upgrade_nomg> are implemented in terms of this function.
This is not as a general purpose byte encoding to Unicode interface:
use the Encode extension for that.
=cut
+
+The grow version is currently not externally documented. It adds a parameter,
+extra, which is the number of unused bytes the string of 'sv' is guaranteed to
+have free after it upon return. This allows the caller to reserve extra space
+that it intends to fill, to avoid extra grows.
+
+Also externally undocumented for the moment is the flag SV_FORCE_UTF8_UPGRADE,
+which can be used to tell this function to not first check to see if there are
+any characters that are different in UTF-8 (variant characters) which would
+force it to allocate a new string to sv, but to assume there are. Typically
+this flag is used by a routine that has already parsed the string to find that
+there are such characters, and passes this information on so that the work
+doesn't have to be repeated.
+
+(One might think that the calling routine could pass in the position of the
+first such variant, so it wouldn't have to be found again. But that is not the
+case, because typically when the caller is likely to use this flag, it won't be
+calling this routine unless it finds something that won't fit into a byte.
+Otherwise it tries to not upgrade and just use bytes. But some things that
+do fit into a byte are variants in utf8, and the caller may not have been
+keeping track of these.)
+
+If the routine itself changes the string, it adds a trailing NUL. Such a NUL
+isn't guaranteed due to having other routines do the work in some input cases,
+or if the input is already flagged as being in utf8.
+
+The speed of this could perhaps be improved for many cases if someone wanted to
+write a fast function that counts the number of variant characters in a string,
+especially if it could return the position of the first one.
+
*/
STRLEN
-Perl_sv_utf8_upgrade_flags(pTHX_ register SV *const sv, const I32 flags)
+Perl_sv_utf8_upgrade_flags_grow(pTHX_ register SV *const sv, const I32 flags, STRLEN extra)
{
dVAR;
- PERL_ARGS_ASSERT_SV_UTF8_UPGRADE_FLAGS;
+ PERL_ARGS_ASSERT_SV_UTF8_UPGRADE_FLAGS_GROW;
if (sv == &PL_sv_undef)
return 0;
STRLEN len = 0;
if (SvREADONLY(sv) && (SvPOKp(sv) || SvIOKp(sv) || SvNOKp(sv))) {
(void) sv_2pv_flags(sv,&len, flags);
- if (SvUTF8(sv))
+ if (SvUTF8(sv)) {
+ if (extra) SvGROW(sv, SvCUR(sv) + extra);
return len;
+ }
} else {
(void) SvPV_force(sv,len);
}
}
if (SvUTF8(sv)) {
+ if (extra) SvGROW(sv, SvCUR(sv) + extra);
return SvCUR(sv);
}
sv_force_normal_flags(sv, 0);
}
- if (PL_encoding && !(flags & SV_UTF8_NO_ENCODING))
+ if (PL_encoding && !(flags & SV_UTF8_NO_ENCODING)) {
sv_recode_to_utf8(sv, PL_encoding);
- else { /* Assume Latin-1/EBCDIC */
+ if (extra) SvGROW(sv, SvCUR(sv) + extra);
+ return SvCUR(sv);
+ }
+
+ if (SvCUR(sv) > 0) { /* Assume Latin-1/EBCDIC */
/* This function could be much more efficient if we
- * had a FLAG in SVs to signal if there are any hibit
+ * had a FLAG in SVs to signal if there are any variant
* chars in the PV. Given that there isn't such a flag
- * make the loop as fast as possible. */
- const U8 * const s = (U8 *) SvPVX_const(sv);
- const U8 * const e = (U8 *) SvEND(sv);
- const U8 *t = s;
+ * make the loop as fast as possible (although there are certainly ways
+ * to speed this up, eg. through vectorization) */
+ U8 * s = (U8 *) SvPVX_const(sv);
+ U8 * e = (U8 *) SvEND(sv);
+ U8 *t = s;
+ STRLEN two_byte_count = 0;
+ if (flags & SV_FORCE_UTF8_UPGRADE) goto must_be_utf8;
+
+ /* See if really will need to convert to utf8. We mustn't rely on our
+ * incoming SV being well formed and having a trailing '\0', as certain
+ * code in pp_formline can send us partially built SVs. */
+
while (t < e) {
const U8 ch = *t++;
- /* Check for hi bit */
- if (!NATIVE_IS_INVARIANT(ch)) {
- STRLEN len = SvCUR(sv);
- /* *Currently* bytes_to_utf8() adds a '\0' after every string
- it converts. This isn't documented. It's not clear if it's
- a bad thing to be doing, and should be changed to do exactly
- what the documentation says. If so, this code will have to
- be changed.
- As is, we mustn't rely on our incoming SV being well formed
- and having a trailing '\0', as certain code in pp_formline
- can send us partially built SVs. */
- U8 * const recoded = bytes_to_utf8((U8*)s, &len);
-
- SvPV_free(sv); /* No longer using what was there before. */
- SvPV_set(sv, (char*)recoded);
- SvCUR_set(sv, len);
- SvLEN_set(sv, len + 1); /* No longer know the real size. */
- break;
- }
+ if (NATIVE_IS_INVARIANT(ch)) continue;
+
+ t--; /* t already incremented; re-point to first variant */
+ two_byte_count = 1;
+ goto must_be_utf8;
}
- /* Mark as UTF-8 even if no hibit - saves scanning loop */
+
+ /* utf8 conversion not needed because all are invariants. Mark as
+ * UTF-8 even if no variant - saves scanning loop */
SvUTF8_on(sv);
+ return SvCUR(sv);
+
+must_be_utf8:
+
+ /* Here, the string should be converted to utf8, either because of an
+ * input flag (two_byte_count = 0), or because a character that
+ * requires 2 bytes was found (two_byte_count = 1). t points either to
+ * the beginning of the string (if we didn't examine anything), or to
+ * the first variant. In either case, everything from s to t - 1 will
+ * occupy only 1 byte each on output.
+ *
+ * There are two main ways to convert. One is to create a new string
+ * and go through the input starting from the beginning, appending each
+ * converted value onto the new string as we go along. It's probably
+ * best to allocate enough space in the string for the worst possible
+ * case rather than possibly running out of space and having to
+ * reallocate and then copy what we've done so far. Since everything
+ * from s to t - 1 is invariant, the destination can be initialized
+ * with these using a fast memory copy
+ *
+ * The other way is to figure out exactly how big the string should be
+ * by parsing the entire input. Then you don't have to make it big
+ * enough to handle the worst possible case, and more importantly, if
+ * the string you already have is large enough, you don't have to
+ * allocate a new string, you can copy the last character in the input
+ * string to the final position(s) that will be occupied by the
+ * converted string and go backwards, stopping at t, since everything
+ * before that is invariant.
+ *
+ * There are advantages and disadvantages to each method.
+ *
+ * In the first method, we can allocate a new string, do the memory
+ * copy from the s to t - 1, and then proceed through the rest of the
+ * string byte-by-byte.
+ *
+ * In the second method, we proceed through the rest of the input
+ * string just calculating how big the converted string will be. Then
+ * there are two cases:
+ * 1) if the string has enough extra space to handle the converted
+ * value. We go backwards through the string, converting until we
+ * get to the position we are at now, and then stop. If this
+ * position is far enough along in the string, this method is
+ * faster than the other method. If the memory copy were the same
+ * speed as the byte-by-byte loop, that position would be about
+ * half-way, as at the half-way mark, parsing to the end and back
+ * is one complete string's parse, the same amount as starting
+ * over and going all the way through. Actually, it would be
+ * somewhat less than half-way, as it's faster to just count bytes
+ * than to also copy, and we don't have the overhead of allocating
+ * a new string, changing the scalar to use it, and freeing the
+ * existing one. But if the memory copy is fast, the break-even
+ * point is somewhere after half way. The counting loop could be
+ * sped up by vectorization, etc, to move the break-even point
+ * further towards the beginning.
+ * 2) if the string doesn't have enough space to handle the converted
+ * value. A new string will have to be allocated, and one might
+ * as well, given that, start from the beginning doing the first
+ * method. We've spent extra time parsing the string and in
+ * exchange all we've gotten is that we know precisely how big to
+ * make the new one. Perl is more optimized for time than space,
+ * so this case is a loser.
+ * So what I've decided to do is not use the 2nd method unless it is
+ * guaranteed that a new string won't have to be allocated, assuming
+ * the worst case. I also decided not to put any more conditions on it
+ * than this, for now. It seems likely that, since the worst case is
+ * twice as big as the unknown portion of the string (plus 1), we won't
+ * be guaranteed enough space, causing us to go to the first method,
+ * unless the string is short, or the first variant character is near
+ * the end of it. In either of these cases, it seems best to use the
+ * 2nd method. The only circumstance I can think of where this would
+ * be really slower is if the string had once had much more data in it
+ * than it does now, but there is still a substantial amount in it */
+
+ {
+ STRLEN invariant_head = t - s;
+ STRLEN size = invariant_head + (e - t) * 2 + 1 + extra;
+ if (SvLEN(sv) < size) {
+
+ /* Here, have decided to allocate a new string */
+
+ U8 *dst;
+ U8 *d;
+
+ Newx(dst, size, U8);
+
+ /* If no known invariants at the beginning of the input string,
+ * set so starts from there. Otherwise, can use memory copy to
+ * get up to where we are now, and then start from here */
+
+ if (invariant_head <= 0) {
+ d = dst;
+ } else {
+ Copy(s, dst, invariant_head, char);
+ d = dst + invariant_head;
+ }
+
+ while (t < e) {
+ const UV uv = NATIVE8_TO_UNI(*t++);
+ if (UNI_IS_INVARIANT(uv))
+ *d++ = (U8)UNI_TO_NATIVE(uv);
+ else {
+ *d++ = (U8)UTF8_EIGHT_BIT_HI(uv);
+ *d++ = (U8)UTF8_EIGHT_BIT_LO(uv);
+ }
+ }
+ *d = '\0';
+ SvPV_free(sv); /* No longer using pre-existing string */
+ SvPV_set(sv, (char*)dst);
+ SvCUR_set(sv, d - dst);
+ SvLEN_set(sv, size);
+ } else {
+
+ /* Here, have decided to get the exact size of the string.
+ * Currently this happens only when we know that there is
+ * guaranteed enough space to fit the converted string, so
+ * don't have to worry about growing. If two_byte_count is 0,
+ * then t points to the first byte of the string which hasn't
+ * been examined yet. Otherwise two_byte_count is 1, and t
+ * points to the first byte in the string that will expand to
+ * two. Depending on this, start examining at t or 1 after t.
+ * */
+
+ U8 *d = t + two_byte_count;
+
+
+ /* Count up the remaining bytes that expand to two */
+
+ while (d < e) {
+ const U8 chr = *d++;
+ if (! NATIVE_IS_INVARIANT(chr)) two_byte_count++;
+ }
+
+ /* The string will expand by just the number of bytes that
+ * occupy two positions. But we are one afterwards because of
+ * the increment just above. This is the place to put the
+ * trailing NUL, and to set the length before we decrement */
+
+ d += two_byte_count;
+ SvCUR_set(sv, d - s);
+ *d-- = '\0';
+
+
+ /* Having decremented d, it points to the position to put the
+ * very last byte of the expanded string. Go backwards through
+ * the string, copying and expanding as we go, stopping when we
+ * get to the part that is invariant the rest of the way down */
+
+ e--;
+ while (e >= t) {
+ const U8 ch = NATIVE8_TO_UNI(*e--);
+ if (UNI_IS_INVARIANT(ch)) {
+ *d-- = UNI_TO_NATIVE(ch);
+ } else {
+ *d-- = (U8)UTF8_EIGHT_BIT_LO(ch);
+ *d-- = (U8)UTF8_EIGHT_BIT_HI(ch);
+ }
+ }
+ }
+ }
}
+
+ /* Mark as UTF-8 even if no variant - saves scanning loop */
+ SvUTF8_on(sv);
return SvCUR(sv);
}
=for apidoc sv_utf8_downgrade
Attempts to convert the PV of an SV from characters to bytes.
-If the PV contains a character beyond byte, this conversion will fail;
+If the PV contains a character that cannot fit
+in a byte, this conversion will fail;
in this case, either returns false or, if C<fail_ok> is not
true, croaks.
SvFAKE_on(dstr); /* can coerce to non-glob */
}
-#ifdef GV_UNIQUE_CHECK
- if (GvUNIQUE((const GV *)dstr)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- }
-#endif
-
if(GvGP(MUTABLE_GV(sstr))) {
/* If source has method cache entry, clear it */
if(GvCVGEN(sstr)) {
SV **location;
U8 import_flag = 0;
const U32 stype = SvTYPE(sref);
+ bool mro_changes = FALSE;
PERL_ARGS_ASSERT_GLOB_ASSIGN_REF;
-#ifdef GV_UNIQUE_CHECK
- if (GvUNIQUE((const GV *)dstr)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- }
-#endif
-
if (intro) {
GvINTRO_off(dstr); /* one-shot flag */
GvLINE(dstr) = CopLINE(PL_curcop);
goto common;
case SVt_PVAV:
location = (SV **) &GvAV(dstr);
+ if (strEQ(GvNAME((GV*)dstr), "ISA"))
+ mro_changes = TRUE;
import_flag = GVf_IMPORTED_AV;
goto common;
case SVt_PVIO:
goto common;
case SVt_PVFM:
location = (SV **) &GvFORM(dstr);
+ goto common;
default:
location = &GvSV(dstr);
import_flag = GVf_IMPORTED_SV;
SvREFCNT_dec(dref);
if (SvTAINTED(sstr))
SvTAINT(dstr);
+ if (mro_changes) mro_isa_changed_in(GvSTASH(dstr));
return;
}
&& ((flags & SV_COW_SHARED_HASH_KEYS)
? (!((sflags & CAN_COW_MASK) == CAN_COW_FLAGS
&& (SvFLAGS(dstr) & CAN_COW_MASK) == CAN_COW_FLAGS
- && SvTYPE(sstr) >= SVt_PVIV))
+ && SvTYPE(sstr) >= SVt_PVIV && SvTYPE(sstr) != SVt_PVFM))
: 1)
#endif
) {
}
#ifdef PERL_OLD_COPY_ON_WRITE
if (!isSwipe) {
- /* I believe I should acquire a global SV mutex if
- it's a COW sv (not a shared hash key) to stop
- it going un copy-on-write.
- If the source SV has gone un copy on write between up there
- and down here, then (assert() that) it is of the correct
- form to make it copy on write again */
if ((sflags & (SVf_FAKE | SVf_READONLY))
!= (SVf_FAKE | SVf_READONLY)) {
SvREADONLY_on(sstr);
SvCUR_set(dstr, cur);
SvREADONLY_on(dstr);
SvFAKE_on(dstr);
- /* Relesase a global SV mutex. */
}
else
{ /* Passes the swipe test. */
#ifdef PERL_OLD_COPY_ON_WRITE
if (SvREADONLY(sv)) {
- /* At this point I believe I should acquire a global SV mutex. */
if (SvFAKE(sv)) {
const char * const pvx = SvPVX_const(sv);
const STRLEN len = SvLEN(sv);
}
else if (IN_PERL_RUNTIME)
Perl_croak(aTHX_ "%s", PL_no_modify);
- /* At this point I believe that I can drop the global SV mutex. */
}
#else
if (SvREADONLY(sv)) {
spv = SvPV_const(csv, slen);
}
else
- sv_utf8_upgrade_nomg(dsv);
+ /* Leave enough space for the cat that's about to happen */
+ sv_utf8_upgrade_flags_grow(dsv, 0, slen);
}
sv_catpvn_nomg(dsv, spv, slen);
}
case PERL_MAGIC_qr:
vtable = &PL_vtbl_regexp;
break;
- case PERL_MAGIC_hints:
- /* As this vtable is all NULL, we can reuse it. */
case PERL_MAGIC_sig:
vtable = &PL_vtbl_sig;
break;
case PERL_MAGIC_hintselem:
vtable = &PL_vtbl_hintselem;
break;
+ case PERL_MAGIC_hints:
+ vtable = &PL_vtbl_hints;
+ break;
case PERL_MAGIC_ext:
/* Reserved for use by extensions not perl internals. */
/* Useful for attaching extension internal data to perl vars. */
SV_CHECK_THINKFIRST_COW_DROP(sv);
if (SvREFCNT(nsv) != 1) {
- Perl_croak(aTHX_ "panic: reference miscount on nsv in sv_replace() (%"
- UVuf " != 1)", (UV) SvREFCNT(nsv));
+ Perl_croak(aTHX_ "panic: reference miscount on nsv in sv_replace()"
+ " (%" UVuf " != 1)", (UV) SvREFCNT(nsv));
}
if (SvMAGICAL(sv)) {
if (SvMAGICAL(nsv))
CV* destructor;
stash = SvSTASH(sv);
destructor = StashHANDLER(stash,DESTROY);
- if (destructor) {
+ if (destructor
+ /* A constant subroutine can have no side effects, so
+ don't bother calling it. */
+ && !CvCONST(destructor)
+ /* Don't bother calling an empty destructor */
+ && (CvISXSUB(destructor)
+ || CvSTART(destructor)->op_next->op_type != OP_LEAVESUB))
+ {
SV* const tmpref = newRV(sv);
SvREADONLY_on(tmpref); /* DESTROY() could be naughty */
ENTER;
#ifdef PERL_OLD_COPY_ON_WRITE
else if (SvPVX_const(sv)) {
if (SvIsCOW(sv)) {
- /* I believe I need to grab the global SV mutex here and
- then recheck the COW status. */
if (DEBUG_C_TEST) {
PerlIO_printf(Perl_debug_log, "Copy on write: clear\n");
sv_dump(sv);
unshare_hek(SvSHARED_HEK_FROM_PV(SvPVX_const(sv)));
}
- /* And drop it here. */
SvFAKE_off(sv);
} else if (SvLEN(sv)) {
Safefree(SvPVX_const(sv));
*/
/*
- * The length is cached in PERL_UTF8_magic, in the mg_len field. Also the
+ * The length is cached in PERL_MAGIC_utf8, in the mg_len field. Also the
* mg_ptr is used, by sv_pos_u2b() and sv_pos_b2u() - see the comments below.
* (Note that the mg_len is not the length of the mg_ptr field.
* This allows the cache to store the character length of the string without
/*
* sv_pos_u2b() uses, like sv_pos_b2u(), the mg_ptr of the potential
- * PERL_UTF8_magic of the sv to store the mapping between UTF-8 and
+ * PERL_MAGIC_utf8 of the sv to store the mapping between UTF-8 and
* byte offsets. See also the comments of S_utf8_mg_pos_cache_update().
*
*/
/*
* sv_pos_b2u() uses, like sv_pos_u2b(), the mg_ptr of the potential
- * PERL_UTF8_magic of the sv to store the mapping between UTF-8 and
+ * PERL_MAGIC_utf8 of the sv to store the mapping between UTF-8 and
* byte offsets.
*
*/
d = SvPVX(sv);
while (isALPHA(*d)) d++;
while (isDIGIT(*d)) d++;
- if (*d) {
+ if (d < SvEND(sv)) {
#ifdef PERL_PRESERVE_IVUV
/* Got to punt this as an integer if needs be, but we don't issue
warnings. Probably ought to make the sv_iv_please() that does
sv_setnv(sv,Atof(SvPVX_const(sv)) - 1.0); /* punt */
}
+/* this define is used to eliminate a chunk of duplicated but shared logic
+ * it has the suffix __SV_C to signal that it isnt API, and isnt meant to be
+ * used anywhere but here - yves
+ */
+#define PUSH_EXTEND_MORTAL__SV_C(AnSv) \
+ STMT_START { \
+ EXTEND_MORTAL(1); \
+ PL_tmps_stack[++PL_tmps_ix] = (AnSv); \
+ } STMT_END
+
/*
=for apidoc sv_mortalcopy
new_SV(sv);
sv_setsv(sv,oldstr);
- EXTEND_MORTAL(1);
- PL_tmps_stack[++PL_tmps_ix] = sv;
+ PUSH_EXTEND_MORTAL__SV_C(sv);
SvTEMP_on(sv);
return sv;
}
new_SV(sv);
SvFLAGS(sv) = SVs_TEMP;
- EXTEND_MORTAL(1);
- PL_tmps_stack[++PL_tmps_ix] = sv;
+ PUSH_EXTEND_MORTAL__SV_C(sv);
return sv;
}
assert(!(flags & ~(SVf_UTF8|SVs_TEMP)));
new_SV(sv);
sv_setpvn(sv,s,len);
- SvFLAGS(sv) |= (flags & SVf_UTF8);
- return (flags & SVs_TEMP) ? sv_2mortal(sv) : sv;
+
+ /* This code used to a sv_2mortal(), however we now unroll the call to sv_2mortal()
+ * and do what it does outselves here.
+ * Since we have asserted that flags can only have the SVf_UTF8 and/or SVs_TEMP flags
+ * set above we can use it to enable the sv flags directly (bypassing SvTEMP_on), which
+ * in turn means we dont need to mask out the SVf_UTF8 flag below, which means that we
+ * eleminate quite a few steps than it looks - Yves (explaining patch by gfx)
+ */
+
+ SvFLAGS(sv) |= flags;
+
+ if(flags & SVs_TEMP){
+ PUSH_EXTEND_MORTAL__SV_C(sv);
+ }
+
+ return sv;
}
/*
return NULL;
if (SvREADONLY(sv) && SvIMMORTAL(sv))
return sv;
- EXTEND_MORTAL(1);
- PL_tmps_stack[++PL_tmps_ix] = sv;
+ PUSH_EXTEND_MORTAL__SV_C(sv);
SvTEMP_on(sv);
return sv;
}
if (args) {
eptr = va_arg(*args, char*);
if (eptr)
-#ifdef MACOS_TRADITIONAL
- /* On MacOS, %#s format is used for Pascal strings */
- if (alt)
- elen = *eptr++;
- else
-#endif
elen = strlen(eptr);
else {
eptr = (char *)nullstr;
else {
eptr = SvPV_const(argsv, elen);
if (DO_UTF8(argsv)) {
- I32 old_precis = precis;
+ STRLEN old_precis = precis;
if (has_precis && precis < elen) {
- I32 p = precis;
+ STRLEN ulen = sv_len_utf8(argsv);
+ I32 p = precis > ulen ? ulen : precis;
sv_pos_u2b(argsv, &p, 0); /* sticks at end */
precis = p;
}
}
string:
- if (has_precis && elen > precis)
+ if (has_precis && precis < elen)
elen = precis;
break;
=cut
-============================================================================*/
+ * =========================================================================*/
#if defined(USE_ITHREADS)
/* Certain cases in Perl_ss_dup have been merged, by relying on the fact
that currently av_dup, gv_dup and hv_dup are the same as sv_dup.
- If this changes, please unmerge ss_dup. */
+ If this changes, please unmerge ss_dup.
+ Likewise, sv_dup_inc_multiple() relies on this fact. */
#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
#define sv_dup_inc_NN(s,t) SvREFCNT_inc_NN(sv_dup(s,t))
#define av_dup(s,t) MUTABLE_AV(sv_dup((const SV *)s,t))
Copy(proto->nexttype, parser->nexttype, 5, I32);
parser->nexttoke = proto->nexttoke;
#endif
+
+ /* XXX should clone saved_curcop here, but we aren't passed
+ * proto_perl; so do it in perl_clone_using instead */
+
return parser;
}
ptr_table_store(PL_ptr_table, gp, ret);
/* clone */
- ret->gp_refcnt = 0; /* must be before any other dups! */
+ /* ret->gp_refcnt must be 0 before any other dups are called. We're relying
+ on Newxz() to do this for us. */
ret->gp_sv = sv_dup_inc(gp->gp_sv, param);
ret->gp_io = io_dup_inc(gp->gp_io, param);
ret->gp_form = cv_dup_inc(gp->gp_form, param);
MAGIC *
Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *const param)
{
- MAGIC *mgprev = (MAGIC*)NULL;
- MAGIC *mgret;
+ MAGIC *mgret = NULL;
+ MAGIC **mgprev_p = &mgret;
PERL_ARGS_ASSERT_MG_DUP;
- if (!mg)
- return (MAGIC*)NULL;
- /* look for it in the table first */
- mgret = (MAGIC*)ptr_table_fetch(PL_ptr_table, mg);
- if (mgret)
- return mgret;
-
for (; mg; mg = mg->mg_moremagic) {
MAGIC *nmg;
- Newxz(nmg, 1, MAGIC);
- if (mgprev)
- mgprev->mg_moremagic = nmg;
- else
- mgret = nmg;
- nmg->mg_virtual = mg->mg_virtual; /* XXX copy dynamic vtable? */
- nmg->mg_private = mg->mg_private;
- nmg->mg_type = mg->mg_type;
- nmg->mg_flags = mg->mg_flags;
+ Newx(nmg, 1, MAGIC);
+ *mgprev_p = nmg;
+ mgprev_p = &(nmg->mg_moremagic);
+
+ /* There was a comment "XXX copy dynamic vtable?" but as we don't have
+ dynamic vtables, I'm not sure why Sarathy wrote it. The comment dates
+ from the original commit adding Perl_mg_dup() - revision 4538.
+ Similarly there is the annotation "XXX random ptr?" next to the
+ assignment to nmg->mg_ptr. */
+ *nmg = *mg;
+
/* FIXME for plugins
- if (mg->mg_type == PERL_MAGIC_qr) {
- nmg->mg_obj = MUTABLE_SV(CALLREGDUPE((REGEXP*)mg->mg_obj, param));
+ if (nmg->mg_type == PERL_MAGIC_qr) {
+ nmg->mg_obj = MUTABLE_SV(CALLREGDUPE((REGEXP*)nmg->mg_obj, param));
}
else
*/
- if(mg->mg_type == PERL_MAGIC_backref) {
+ if(nmg->mg_type == PERL_MAGIC_backref) {
/* The backref AV has its reference count deliberately bumped by
1. */
nmg->mg_obj
- = SvREFCNT_inc(av_dup_inc((const AV *) mg->mg_obj, param));
+ = SvREFCNT_inc(av_dup_inc((const AV *) nmg->mg_obj, param));
}
else {
- nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
- ? sv_dup_inc(mg->mg_obj, param)
- : sv_dup(mg->mg_obj, param);
- }
- nmg->mg_len = mg->mg_len;
- nmg->mg_ptr = mg->mg_ptr; /* XXX random ptr? */
- if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
- if (mg->mg_len > 0) {
- nmg->mg_ptr = SAVEPVN(mg->mg_ptr, mg->mg_len);
- if (mg->mg_type == PERL_MAGIC_overload_table &&
- AMT_AMAGIC((AMT*)mg->mg_ptr))
+ nmg->mg_obj = (nmg->mg_flags & MGf_REFCOUNTED)
+ ? sv_dup_inc(nmg->mg_obj, param)
+ : sv_dup(nmg->mg_obj, param);
+ }
+
+ if (nmg->mg_ptr && nmg->mg_type != PERL_MAGIC_regex_global) {
+ if (nmg->mg_len > 0) {
+ nmg->mg_ptr = SAVEPVN(nmg->mg_ptr, nmg->mg_len);
+ if (nmg->mg_type == PERL_MAGIC_overload_table &&
+ AMT_AMAGIC((AMT*)nmg->mg_ptr))
{
- const AMT * const amtp = (AMT*)mg->mg_ptr;
AMT * const namtp = (AMT*)nmg->mg_ptr;
- I32 i;
- for (i = 1; i < NofAMmeth; i++) {
- namtp->table[i] = cv_dup_inc(amtp->table[i], param);
- }
+ sv_dup_inc_multiple((SV**)(namtp->table),
+ (SV**)(namtp->table), NofAMmeth, param);
}
}
- else if (mg->mg_len == HEf_SVKEY)
- nmg->mg_ptr = (char*)sv_dup_inc((const SV *)mg->mg_ptr, param);
+ else if (nmg->mg_len == HEf_SVKEY)
+ nmg->mg_ptr = (char*)sv_dup_inc((const SV *)nmg->mg_ptr, param);
}
- if ((mg->mg_flags & MGf_DUP) && mg->mg_virtual && mg->mg_virtual->svt_dup) {
+ if ((nmg->mg_flags & MGf_DUP) && nmg->mg_virtual && nmg->mg_virtual->svt_dup) {
CALL_FPTR(nmg->mg_virtual->svt_dup)(aTHX_ nmg, param);
}
- mgprev = nmg;
}
return mgret;
}
PTR_TBL_t *tbl;
PERL_UNUSED_CONTEXT;
- Newxz(tbl, 1, PTR_TBL_t);
+ Newx(tbl, 1, PTR_TBL_t);
tbl->tbl_max = 511;
tbl->tbl_items = 0;
Newxz(tbl->tbl_ary, tbl->tbl_max + 1, PTR_TBL_ENT_t*);
}
}
+/* duplicate a list of SVs. source and dest may point to the same memory. */
+static SV **
+S_sv_dup_inc_multiple(pTHX_ SV *const *source, SV **dest,
+ SSize_t items, CLONE_PARAMS *const param)
+{
+ PERL_ARGS_ASSERT_SV_DUP_INC_MULTIPLE;
+
+ while (items-- > 0) {
+ *dest++ = sv_dup_inc(*source++, param);
+ }
+
+ return dest;
+}
+
/* duplicate an SV of any type (including AV, HV etc) */
SV *
break;
case SVt_PVGV:
- if (GvUNIQUE((const GV *)sstr)) {
- NOOP; /* Do sharing here, and fall through */
- }
case SVt_PVIO:
case SVt_PVFM:
case SVt_PVHV:
LvTARG(dstr) = sv_dup_inc(LvTARG(dstr), param);
case SVt_PVGV:
if(isGV_with_GP(sstr)) {
- if (GvNAME_HEK(dstr))
- GvNAME_HEK(dstr) = hek_dup(GvNAME_HEK(dstr), param);
+ GvNAME_HEK(dstr) = hek_dup(GvNAME_HEK(dstr), param);
/* Don't call sv_add_backref here as it's going to be
created as part of the magic cloning of the symbol
table. */
IoBOTTOM_NAME(dstr) = SAVEPV(IoBOTTOM_NAME(dstr));
break;
case SVt_PVAV:
- if (AvARRAY((const AV *)sstr)) {
+ /* avoid cloning an empty array */
+ if (AvARRAY((const AV *)sstr) && AvFILLp((const AV *)sstr) >= 0) {
SV **dst_ary, **src_ary;
SSize_t items = AvFILLp((const AV *)sstr) + 1;
AvARRAY(MUTABLE_AV(dstr)) = dst_ary;
AvALLOC((const AV *)dstr) = dst_ary;
if (AvREAL((const AV *)sstr)) {
- while (items-- > 0)
- *dst_ary++ = sv_dup_inc(*src_ary++, param);
+ dst_ary = sv_dup_inc_multiple(src_ary, dst_ary, items,
+ param);
}
else {
while (items-- > 0)
else {
AvARRAY(MUTABLE_AV(dstr)) = NULL;
AvALLOC((const AV *)dstr) = (SV**)NULL;
+ AvMAX( (const AV *)dstr) = -1;
+ AvFILLp((const AV *)dstr) = -1;
}
break;
case SVt_PVHV:
SvFLAGS(dstr) |= SVf_OOK;
hvname = saux->xhv_name;
- daux->xhv_name = hvname ? hek_dup(hvname, param) : hvname;
+ daux->xhv_name = hek_dup(hvname, param);
daux->xhv_riter = saux->xhv_riter;
daux->xhv_eiter = saux->xhv_eiter
CvROOT(dstr) = OpREFCNT_inc(CvROOT(dstr));
OP_REFCNT_UNLOCK;
if (CvCONST(dstr) && CvISXSUB(dstr)) {
- CvXSUBANY(dstr).any_ptr = GvUNIQUE(CvGV(dstr)) ?
- SvREFCNT_inc(CvXSUBANY(dstr).any_ptr) :
+ CvXSUBANY(dstr).any_ptr =
sv_dup_inc((const SV *)CvXSUBANY(dstr).any_ptr, param);
}
/* don't dup if copying back - CvGV isn't refcounted, so the
PL_parser = parser_dup(proto_perl->Iparser, param);
+ /* XXX this only works if the saved cop has already been cloned */
+ if (proto_perl->Iparser) {
+ PL_parser->saved_curcop = (COP*)any_dup(
+ proto_perl->Iparser->saved_curcop,
+ proto_perl);
+ }
+
PL_subline = proto_perl->Isubline;
PL_subname = sv_dup_inc(proto_perl->Isubname, param);
/* utf8 character classes */
PL_utf8_alnum = sv_dup_inc(proto_perl->Iutf8_alnum, param);
- PL_utf8_alnumc = sv_dup_inc(proto_perl->Iutf8_alnumc, param);
PL_utf8_ascii = sv_dup_inc(proto_perl->Iutf8_ascii, param);
PL_utf8_alpha = sv_dup_inc(proto_perl->Iutf8_alpha, param);
PL_utf8_space = sv_dup_inc(proto_perl->Iutf8_space, param);
PL_glob_index = proto_perl->Iglob_index;
PL_srand_called = proto_perl->Isrand_called;
- PL_bitcount = NULL; /* reinits on demand */
if (proto_perl->Ipsig_pend) {
Newxz(PL_psig_pend, SIG_SIZE, int);
PL_psig_pend = (int*)NULL;
}
- if (proto_perl->Ipsig_ptr) {
- Newxz(PL_psig_ptr, SIG_SIZE, SV*);
- Newxz(PL_psig_name, SIG_SIZE, SV*);
- for (i = 1; i < SIG_SIZE; i++) {
- PL_psig_ptr[i] = sv_dup_inc(proto_perl->Ipsig_ptr[i], param);
- PL_psig_name[i] = sv_dup_inc(proto_perl->Ipsig_name[i], param);
- }
+ if (proto_perl->Ipsig_name) {
+ Newx(PL_psig_name, 2 * SIG_SIZE, SV*);
+ sv_dup_inc_multiple(proto_perl->Ipsig_name, PL_psig_name, 2 * SIG_SIZE,
+ param);
+ PL_psig_ptr = PL_psig_name + SIG_SIZE;
}
else {
PL_psig_ptr = (SV**)NULL;
PL_tmps_ix = proto_perl->Itmps_ix;
PL_tmps_max = proto_perl->Itmps_max;
PL_tmps_floor = proto_perl->Itmps_floor;
- Newxz(PL_tmps_stack, PL_tmps_max, SV*);
- i = 0;
- while (i <= PL_tmps_ix) {
- PL_tmps_stack[i] = sv_dup_inc(proto_perl->Itmps_stack[i], param);
- ++i;
- }
+ Newx(PL_tmps_stack, PL_tmps_max, SV*);
+ sv_dup_inc_multiple(proto_perl->Itmps_stack, PL_tmps_stack, PL_tmps_ix,
+ param);
/* next PUSHMARK() sets *(PL_markstack_ptr+1) */
i = proto_perl->Imarkstack_max - proto_perl->Imarkstack;
SV * const nsv = MUTABLE_SV(ptr_table_fetch(PL_ptr_table,
proto_perl->Itmps_stack[i]));
if (nsv && !SvREFCNT(nsv)) {
- EXTEND_MORTAL(1);
- PL_tmps_stack[++PL_tmps_ix] = SvREFCNT_inc_simple(nsv);
+ PUSH_EXTEND_MORTAL__SV_C(SvREFCNT_inc_simple(nsv));
}
}
}
/* Pluggable optimizer */
PL_peepp = proto_perl->Ipeepp;
+ /* op_free() hook */
+ PL_opfreehook = proto_perl->Iopfreehook;
PL_stashcache = newHV();
PTR2UV(PL_watchok));
}
- if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
- ptr_table_free(PL_ptr_table);
- PL_ptr_table = NULL;
- }
+ PL_registered_mros = hv_dup_inc(proto_perl->Iregistered_mros, param);
/* Call the ->CLONE method, if it exists, for each of the stashes
identified by sv_dup() above.
}
}
+ if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
+ ptr_table_free(PL_ptr_table);
+ PL_ptr_table = NULL;
+ }
+
+
SvREFCNT_dec(param->stashes);
/* orphaned? eg threads->new inside BEGIN or use */
Need a better fix at dome point. DAPM 11/2007 */
break;
+ case OP_FLIP:
+ case OP_FLOP:
+ {
+ GV * const gv = gv_fetchpvs(".", GV_NOTQUAL, SVt_PV);
+ if (gv && GvSV(gv) == uninit_sv)
+ return newSVpvs_flags("$.", SVs_TEMP);
+ goto do_op;
+ }
case OP_POS:
/* def-ness of rval pos() is independent of the def-ness of its arg */
https://perl5.git.perl.org / perl5.git / blobdiff