break;
default:
gv = (GV *) save_scalar(gv);
-maybe_deref:
if (deref) /* val != NULL */
val = SvRV(val);
break;
/* --- Initialize the stack and the action userdata ------------------------ */
-STATIC I32 su_init(pTHX_ I32 level, void *ud, I32 size) {
+STATIC I32 su_init(pTHX_ I32 cxix, void *ud, I32 size) {
#define su_init(L, U, S) su_init(aTHX_ (L), (U), (S))
I32 i, depth = 0, *origin;
I32 cur, last, step;
LEAVE;
- if (level <= 0) {
+ if (cxix >= cxstack_ix) {
SU_UD_HANDLER(ud)(aTHX_ ud);
goto done;
}
- SU_D(PerlIO_printf(Perl_debug_log, "%p: ### init for level %d\n", ud, level));
+ SU_D(PerlIO_printf(Perl_debug_log, "%p: ### init for cx %d\n", ud, cxix));
- for (i = 0; i < level; ++i) {
- PERL_CONTEXT *cx = &cxstack[cxstack_ix - i];
+ for (i = cxstack_ix; i > cxix; --i) {
+ PERL_CONTEXT *cx = cxstack + i;
switch (CxTYPE(cx)) {
#if SU_HAS_PERL(5, 11, 0)
case CXt_LOOP_FOR:
/* --- XS ------------------------------------------------------------------ */
-#define SU_GET_LEVEL(A) \
- STMT_START { \
- if (items > A) { \
- SV *lsv = ST(A); \
- if (SvOK(lsv)) \
- level = SvIV(lsv); \
- if (level < 0) \
- XSRETURN(0); \
- } \
- if (level > cxstack_ix) \
- level = cxstack_ix; \
+#if SU_HAS_PERL(5, 8, 9)
+# define SU_SKIP_DB_MAX 2
+#else
+# define SU_SKIP_DB_MAX 3
+#endif
+
+/* Skip context sequences of 1 to SU_SKIP_DB_MAX (included) block contexts
+ * followed by a DB sub */
+
+#define SU_SKIP_DB(C) \
+ STMT_START { \
+ I32 i = 1; \
+ PERL_CONTEXT *cx = cxstack + (C); \
+ do { \
+ if (CxTYPE(cx) == CXt_BLOCK && (C) >= i) { \
+ --cx; \
+ if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.cv == GvCV(PL_DBsub)) { \
+ (C) -= i + 1; \
+ break; \
+ } \
+ } else \
+ break; \
+ } while (++i <= SU_SKIP_DB_MAX); \
} STMT_END
-#define SU_GET_CONTEXT(A, B) \
- STMT_START { \
- if (items > A) { \
- SV *lsv = ST(B); \
- if (SvOK(lsv)) \
- level = SvIV(lsv); \
- if (level < 0) \
- level = 0; \
- else if (level > cxix) \
- level = cxix; \
- } \
+#define SU_GET_CONTEXT(A, B) \
+ STMT_START { \
+ if (items > A) { \
+ SV *csv = ST(B); \
+ if (SvOK(csv)) \
+ cxix = SvIV(csv); \
+ if (cxix < 0) \
+ cxix = 0; \
+ else if (cxix > cxstack_ix) \
+ cxix = cxstack_ix; \
+ } else { \
+ cxix = cxstack_ix; \
+ if (PL_DBsub) \
+ SU_SKIP_DB(cxix); \
+ } \
} STMT_END
-#define SU_DOPOPTOCX(t) \
- STMT_START { \
- I32 i, cxix = cxstack_ix, level = 0; \
- SU_GET_CONTEXT(0, 0); \
- for (i = cxix - level; i >= 0; --i) { \
- if (CxTYPE(&cxstack[i]) == t) { \
- ST(0) = sv_2mortal(newSViv(cxix - i)); \
- XSRETURN(1); \
- } \
- } \
- XSRETURN_UNDEF; \
+#define SU_GET_LEVEL(A, B) \
+ STMT_START { \
+ if (items > 0) { \
+ SV *lsv = ST(B); \
+ if (SvOK(lsv)) \
+ level = SvIV(lsv); \
+ if (level < 0) \
+ level = 0; \
+ } else \
+ level = 0; \
} STMT_END
XS(XS_Scope__Upper_unwind); /* prototype to pass -Wmissing-prototypes */
dXSARGS;
#endif
dMY_CXT;
- I32 cxix = cxstack_ix, level = 0;
+ I32 cxix;
PERL_UNUSED_VAR(cv); /* -W */
PERL_UNUSED_VAR(ax); /* -Wall */
SU_GET_CONTEXT(0, items - 1);
- cxix -= level;
do {
PERL_CONTEXT *cx = cxstack + cxix;
switch (CxTYPE(cx)) {
case CXt_SUB:
+ if (PL_DBsub && cx->blk_sub.cv == GvCV(PL_DBsub))
+ continue;
case CXt_EVAL:
case CXt_FORMAT:
MY_CXT.cxix = cxix;
HV *stash;
MY_CXT_INIT;
stash = gv_stashpv(__PACKAGE__, 1);
- newCONSTSUB(stash, "HERE", newSViv(0));
+ newCONSTSUB(stash, "TOP", newSViv(0));
newXSproto("Scope::Upper::unwind", XS_Scope__Upper_unwind, file, NULL);
}
#endif /* SU_THREADSAFE */
SV *
-TOP()
+HERE()
PROTOTYPE:
-CODE:
- RETVAL = newSViv(cxstack_ix);
-OUTPUT:
- RETVAL
-
-SV *
-UP(...)
-PROTOTYPE: ;$
PREINIT:
- I32 i = 0;
I32 cxix = cxstack_ix;
CODE:
- if (items)
- i = SvIV(ST(0));
- if (++i > cxix)
- i = cxix;
- RETVAL = newSViv(i);
+ if (PL_DBsub)
+ SU_SKIP_DB(cxix);
+ RETVAL = newSViv(cxix);
OUTPUT:
RETVAL
SV *
-DOWN(...)
+UP(...)
PROTOTYPE: ;$
PREINIT:
- I32 i = 0;
+ I32 cxix;
CODE:
- if (items)
- i = SvIV(ST(0));
- if (--i < 0)
- i = 0;
- RETVAL = newSViv(i);
+ SU_GET_CONTEXT(0, 0);
+ if (--cxix < 0)
+ cxix = 0;
+ if (PL_DBsub)
+ SU_SKIP_DB(cxix);
+ RETVAL = newSViv(cxix);
OUTPUT:
RETVAL
void
SUB(...)
PROTOTYPE: ;$
+PREINIT:
+ I32 cxix;
PPCODE:
- SU_DOPOPTOCX(CXt_SUB);
+ SU_GET_CONTEXT(0, 0);
+ for (; cxix >= 0; --cxix) {
+ PERL_CONTEXT *cx = cxstack + cxix;
+ switch (CxTYPE(cx)) {
+ default:
+ continue;
+ case CXt_SUB:
+ if (PL_DBsub && cx->blk_sub.cv == GvCV(PL_DBsub))
+ continue;
+ ST(0) = sv_2mortal(newSViv(cxix));
+ XSRETURN(1);
+ }
+ }
+ XSRETURN_UNDEF;
void
EVAL(...)
PROTOTYPE: ;$
+PREINIT:
+ I32 cxix;
PPCODE:
- SU_DOPOPTOCX(CXt_EVAL);
+ SU_GET_CONTEXT(0, 0);
+ for (; cxix >= 0; --cxix) {
+ PERL_CONTEXT *cx = cxstack + cxix;
+ switch (CxTYPE(cx)) {
+ default:
+ continue;
+ case CXt_EVAL:
+ ST(0) = sv_2mortal(newSViv(cxix));
+ XSRETURN(1);
+ }
+ }
+ XSRETURN_UNDEF;
void
-CALLER(...)
+SCOPE(...)
PROTOTYPE: ;$
PREINIT:
- I32 cxix = cxstack_ix, caller = 0, level = 0;
+ I32 cxix, level;
PPCODE:
- if (items) {
- SV *csv = ST(0);
- if (SvOK(csv))
- caller = SvIV(csv);
- }
+ SU_GET_LEVEL(0, 0);
cxix = cxstack_ix;
- while (cxix > 0) {
- PERL_CONTEXT *cx = cxstack + cxix--;
+ if (PL_DBsub) {
+ SU_SKIP_DB(cxix);
+ while (cxix > 0) {
+ if (--level < 0)
+ break;
+ --cxix;
+ SU_SKIP_DB(cxix);
+ }
+ } else {
+ cxix -= level;
+ if (cxix < 0)
+ cxix = 0;
+ }
+ ST(0) = sv_2mortal(newSViv(cxix));
+ XSRETURN(1);
+
+void
+CALLER(...)
+PROTOTYPE: ;$
+PREINIT:
+ I32 cxix, level;
+PPCODE:
+ SU_GET_LEVEL(0, 0);
+ for (cxix = cxstack_ix; cxix > 0; --cxix) {
+ PERL_CONTEXT *cx = cxstack + cxix;
switch (CxTYPE(cx)) {
case CXt_SUB:
+ if (PL_DBsub && cx->blk_sub.cv == GvCV(PL_DBsub))
+ continue;
case CXt_EVAL:
case CXt_FORMAT:
- --caller;
- if (caller < 0)
+ if (--level < 0)
goto done;
break;
}
- ++level;
}
done:
- ST(0) = sv_2mortal(newSViv(level));
+ ST(0) = sv_2mortal(newSViv(cxix));
XSRETURN(1);
void
want_at(...)
PROTOTYPE: ;$
PREINIT:
- I32 cxix = cxstack_ix, level = 0;
+ I32 cxix;
PPCODE:
SU_GET_CONTEXT(0, 0);
- cxix -= level;
while (cxix > 0) {
PERL_CONTEXT *cx = cxstack + cxix--;
switch (CxTYPE(cx)) {
reap(SV *hook, ...)
PROTOTYPE: &;$
PREINIT:
- I32 level = 0;
+ I32 cxix;
su_ud_reap *ud;
CODE:
- SU_GET_LEVEL(1);
+ SU_GET_CONTEXT(1, 1);
Newx(ud, 1, su_ud_reap);
SU_UD_ORIGIN(ud) = NULL;
SU_UD_HANDLER(ud) = su_reap;
ud->cb = newSVsv(hook);
- su_init(level, ud, 3);
+ su_init(cxix, ud, 3);
void
localize(SV *sv, SV *val, ...)
PROTOTYPE: $$;$
PREINIT:
- I32 level = 0;
+ I32 cxix;
su_ud_localize *ud;
CODE:
- SU_GET_LEVEL(2);
+ SU_GET_CONTEXT(2, 2);
Newx(ud, 1, su_ud_localize);
SU_UD_ORIGIN(ud) = NULL;
SU_UD_HANDLER(ud) = su_localize;
ud->sv = sv;
ud->val = newSVsv(val);
ud->elem = NULL;
- su_init(level, ud, 3);
+ su_init(cxix, ud, 3);
void
localize_elem(SV *sv, SV *elem, SV *val, ...)
PROTOTYPE: $$$;$
PREINIT:
- I32 level = 0;
+ I32 cxix;
su_ud_localize *ud;
CODE:
- SU_GET_LEVEL(3);
+ SU_GET_CONTEXT(3, 3);
Newx(ud, 1, su_ud_localize);
SU_UD_ORIGIN(ud) = NULL;
SU_UD_HANDLER(ud) = su_localize;
ud->val = newSVsv(val);
SvREFCNT_inc(elem);
ud->elem = elem;
- su_init(level, ud, 4);
+ su_init(cxix, ud, 4);
void
localize_delete(SV *sv, SV *elem, ...)
PROTOTYPE: $$;$
PREINIT:
- I32 level = 0;
+ I32 cxix;
su_ud_localize *ud;
CODE:
- SU_GET_LEVEL(2);
+ SU_GET_CONTEXT(2, 2);
Newx(ud, 1, su_ud_localize);
SU_UD_ORIGIN(ud) = NULL;
SU_UD_HANDLER(ud) = su_localize;
ud->val = NULL;
SvREFCNT_inc(elem);
ud->elem = elem;
- su_init(level, ud, 4);
+ su_init(cxix, ud, 4);
projects / perl / modules / Scope-Upper.git / blobdiff