Re: [Another bug] Re: about Storable perl module (again)
[p5sagit/p5-mst-13.2.git] / ext / Storable / Storable.xs
index 05705c0..baea2c5 100644 (file)
@@ -59,7 +59,7 @@
 #include <XSUB.h>
 
 #ifndef NETWARE
-#if 1
+#if 0
 #define DEBUGME /* Debug mode, turns assertions on as well */
 #define DASSERT /* Assertion mode */
 #endif
@@ -140,22 +140,24 @@ typedef double NV;                        /* Older perls lack the NV type */
  * TRACEME() will only output things when the $Storable::DEBUGME is true.
  */
 
-#define TRACEME(x)     do {                                                                    \
+#define TRACEME(x)                                                                             \
+  STMT_START {                                                                                 \
        if (SvTRUE(perl_get_sv("Storable::DEBUGME", TRUE)))     \
-               { PerlIO_stdoutf x; PerlIO_stdoutf("\n"); }                     \
-} while (0)
+               { PerlIO_stdoutf x; PerlIO_stdoutf("\n"); }             \
+  } STMT_END
 #else
 #define TRACEME(x)
 #endif /* DEBUGME */
 
 #ifdef DASSERT
-#define ASSERT(x,y)    do {                                                                    \
+#define ASSERT(x,y)                                                                            \
+  STMT_START {                                                                                 \
        if (!(x)) {                                                                                             \
                PerlIO_stdoutf("ASSERT FAILED (\"%s\", line %d): ",     \
                        __FILE__, __LINE__);                                                    \
                PerlIO_stdoutf y; PerlIO_stdoutf("\n");                         \
        }                                                                                                               \
-} while (0)
+  } STMT_END
 #else
 #define ASSERT(x,y)
 #endif
@@ -177,9 +179,9 @@ typedef double NV;                  /* Older perls lack the NV type */
 #define SX_BYTE                C(8)    /* (signed) byte forthcoming */
 #define SX_NETINT      C(9)    /* Integer in network order forthcoming */
 #define SX_SCALAR      C(10)   /* Scalar (binary, small) follows (length, data) */
-#define SX_TIED_ARRAY  C(11)  /* Tied array forthcoming */
-#define SX_TIED_HASH   C(12)  /* Tied hash forthcoming */
-#define SX_TIED_SCALAR C(13)  /* Tied scalar forthcoming */
+#define SX_TIED_ARRAY  C(11)   /* Tied array forthcoming */
+#define SX_TIED_HASH   C(12)   /* Tied hash forthcoming */
+#define SX_TIED_SCALAR C(13)   /* Tied scalar forthcoming */
 #define SX_SV_UNDEF    C(14)   /* Perl's immortal PL_sv_undef */
 #define SX_SV_YES      C(15)   /* Perl's immortal PL_sv_yes */
 #define SX_SV_NO       C(16)   /* Perl's immortal PL_sv_no */
@@ -187,11 +189,11 @@ typedef double NV;                        /* Older perls lack the NV type */
 #define SX_IX_BLESS    C(18)   /* Object is blessed, classname given by index */
 #define SX_HOOK                C(19)   /* Stored via hook, user-defined */
 #define SX_OVERLOAD    C(20)   /* Overloaded reference */
-#define SX_TIED_KEY C(21)   /* Tied magic key forthcoming */
-#define SX_TIED_IDX C(22)   /* Tied magic index forthcoming */
-#define SX_UTF8STR     C(23)   /* UTF-8 string forthcoming (small) */
-#define SX_LUTF8STR    C(24)   /* UTF-8 string forthcoming (large) */
-#define SX_FLAG_HASH   C(25)   /* Hash with flags forthcoming (size, flags, key/flags/value triplet list) */
+#define SX_TIED_KEY    C(21)   /* Tied magic key forthcoming */
+#define SX_TIED_IDX    C(22)   /* Tied magic index forthcoming */
+#define SX_UTF8STR     C(23)   /* UTF-8 string forthcoming (small) */
+#define SX_LUTF8STR    C(24)   /* UTF-8 string forthcoming (large) */
+#define SX_FLAG_HASH   C(25)   /* Hash with flags forthcoming (size, flags, key/flags/value triplet list) */
 #define SX_ERROR       C(26)   /* Error */
 
 /*
@@ -208,7 +210,7 @@ typedef double NV;                  /* Older perls lack the NV type */
  */
 
 #define SX_CLASS       'b'             /* Object is blessed, class name length <255 */
-#define SX_LG_CLASS 'B'                /* Object is blessed, class name length >255 */
+#define SX_LG_CLASS    'B'             /* Object is blessed, class name length >255 */
 #define SX_STORED      'X'             /* End of object */
 
 /*
@@ -339,6 +341,7 @@ typedef struct stcxt {
 #ifndef HAS_UTF8_ALL
         int use_bytes;         /* whether to bytes-ify utf8 */
 #endif
+        int accept_future_minor; /* croak immediately on future minor versions?  */
        int s_dirty;            /* context is dirty due to CROAK() -- can be cleaned */
        int membuf_ro;          /* true means membuf is read-only and msaved is rw */
        struct extendable keybuf;       /* for hash key retrieval */
@@ -348,9 +351,20 @@ typedef struct stcxt {
        int ver_major;          /* major of version for retrieved object */
        int ver_minor;          /* minor of version for retrieved object */
        SV *(**retrieve_vtbl)();        /* retrieve dispatch table */
-       struct stcxt *prev;     /* contexts chained backwards in real recursion */
+       SV *prev;               /* contexts chained backwards in real recursion */
+       SV *my_sv;              /* the blessed scalar who's SvPVX() I am */
 } stcxt_t;
 
+#define NEW_STORABLE_CXT_OBJ(cxt)                                      \
+  STMT_START {                                                                         \
+       SV *self = newSV(sizeof(stcxt_t) - 1);                  \
+       SV *my_sv = newRV_noinc(self);                                  \
+       sv_bless(my_sv, gv_stashpv("Storable::Cxt", TRUE));     \
+       cxt = (stcxt_t *)SvPVX(self);                                   \
+       Zero(cxt, 1, stcxt_t);                                                  \
+       cxt->my_sv = my_sv;                                                             \
+  } STMT_END
+
 #if defined(MULTIPLICITY) || defined(PERL_OBJECT) || defined(PERL_CAPI)
 
 #if (PATCHLEVEL <= 4) && (SUBVERSION < 68)
@@ -363,29 +377,33 @@ typedef struct stcxt {
 #endif /* < perl5.004_68 */
 
 #define dSTCXT_PTR(T,name)                                                     \
-       T name = ((perinterp_sv && SvIOK(perinterp_sv)  \
-                               ? INT2PTR(T, SvIVX(perinterp_sv)) : (T) 0))
+       T name = ((perinterp_sv && SvIOK(perinterp_sv) && SvIVX(perinterp_sv)   \
+                               ? (T)SvPVX(SvRV(INT2PTR(SV*,SvIVX(perinterp_sv)))) : (T) 0))
 #define dSTCXT                                                                         \
        dSTCXT_SV;                                                                              \
        dSTCXT_PTR(stcxt_t *, cxt)
 
-#define INIT_STCXT                                                                     \
-      dSTCXT;                                                                          \
-      Newz(0, cxt, 1, stcxt_t);                                                \
-      sv_setiv(perinterp_sv, PTR2IV(cxt))
+#define INIT_STCXT                                                     \
+       dSTCXT;                                                                 \
+       NEW_STORABLE_CXT_OBJ(cxt);                              \
+       sv_setiv(perinterp_sv, PTR2IV(cxt->my_sv))
 
-#define SET_STCXT(x) do {                                                      \
+#define SET_STCXT(x)                                                           \
+  STMT_START {                                                                         \
        dSTCXT_SV;                                                                              \
-       sv_setiv(perinterp_sv, PTR2IV(x));                              \
-} while (0)
+       sv_setiv(perinterp_sv, PTR2IV(x->my_sv));               \
+  } STMT_END
 
 #else /* !MULTIPLICITY && !PERL_OBJECT && !PERL_CAPI */
 
 static stcxt_t Context;
 static stcxt_t *Context_ptr = &Context;
 #define dSTCXT                 stcxt_t *cxt = Context_ptr
-#define INIT_STCXT             dSTCXT
-#define SET_STCXT(x)   Context_ptr = x
+#define INIT_STCXT                                             \
+       dSTCXT;                                                         \
+       NEW_STORABLE_CXT_OBJ(cxt)
+
+#define SET_STCXT(x)           Context_ptr = x
 
 #endif /* MULTIPLICITY || PERL_OBJECT || PERL_CAPI */
 
@@ -406,7 +424,7 @@ static stcxt_t *Context_ptr = &Context;
  * but the topmost context stacked.
  */
 
-#define CROAK(x)       do { cxt->s_dirty = 1; croak x; } while (0)
+#define CROAK(x)       STMT_START { cxt->s_dirty = 1; croak x; } STMT_END
 
 /*
  * End of "thread-safe" related definitions.
@@ -448,20 +466,22 @@ static stcxt_t *Context_ptr = &Context;
  */
 #define kbuf   (cxt->keybuf).arena
 #define ksiz   (cxt->keybuf).asiz
-#define KBUFINIT() do {                                        \
+#define KBUFINIT()                                             \
+  STMT_START {                                                 \
        if (!kbuf) {                                            \
                TRACEME(("** allocating kbuf of 128 bytes")); \
                New(10003, kbuf, 128, char);    \
                ksiz = 128;                                             \
        }                                                                       \
-} while (0)
-#define KBUFCHK(x) do {                        \
+  } STMT_END
+#define KBUFCHK(x)                             \
+  STMT_START {                                 \
        if (x >= ksiz) {                        \
                TRACEME(("** extending kbuf to %d bytes (had %d)", x+1, ksiz)); \
                Renew(kbuf, x+1, char); \
                ksiz = x+1;                             \
        }                                                       \
-} while (0)
+  } STMT_END
 
 /*
  * memory buffer handling
@@ -481,7 +501,8 @@ static stcxt_t *Context_ptr = &Context;
 #define int_aligned(x) \
        ((unsigned long) (x) == trunc_int(x))
 
-#define MBUF_INIT(x) do {                              \
+#define MBUF_INIT(x)                                   \
+  STMT_START {                                                 \
        if (!mbase) {                                           \
                TRACEME(("** allocating mbase of %d bytes", MGROW)); \
                New(10003, mbase, MGROW, char); \
@@ -492,7 +513,7 @@ static stcxt_t *Context_ptr = &Context;
                mend = mbase + x;                               \
        else                                                            \
                mend = mbase + msiz;                    \
-} while (0)
+  } STMT_END
 
 #define MBUF_TRUNC(x)  mptr = mbase + x
 #define MBUF_SIZE()            (mptr - mbase)
@@ -505,34 +526,38 @@ static stcxt_t *Context_ptr = &Context;
  * buffer into cxt->msaved, before MBUF_LOAD() can be used to retrieve
  * data from a string.
  */
-#define MBUF_SAVE_AND_LOAD(in) do {            \
+#define MBUF_SAVE_AND_LOAD(in)                 \
+  STMT_START {                                                 \
        ASSERT(!cxt->membuf_ro, ("mbase not already saved")); \
        cxt->membuf_ro = 1;                                     \
        TRACEME(("saving mbuf"));                       \
        StructCopy(&cxt->membuf, &cxt->msaved, struct extendable); \
        MBUF_LOAD(in);                                          \
-} while (0)
+  } STMT_END
 
-#define MBUF_RESTORE() do {                            \
+#define MBUF_RESTORE()                                         \
+  STMT_START {                                                 \
        ASSERT(cxt->membuf_ro, ("mbase is read-only")); \
        cxt->membuf_ro = 0;                                     \
        TRACEME(("restoring mbuf"));            \
        StructCopy(&cxt->msaved, &cxt->membuf, struct extendable); \
-} while (0)
+  } STMT_END
 
 /*
  * Use SvPOKp(), because SvPOK() fails on tainted scalars.
  * See store_scalar() for other usage of this workaround.
  */
-#define MBUF_LOAD(v) do {                              \
+#define MBUF_LOAD(v)                                   \
+  STMT_START {                                                 \
        ASSERT(cxt->membuf_ro, ("mbase is read-only")); \
        if (!SvPOKp(v))                                         \
                CROAK(("Not a scalar string")); \
        mptr = mbase = SvPV(v, msiz);           \
        mend = mbase + msiz;                            \
-} while (0)
+  } STMT_END
 
-#define MBUF_XTEND(x) do {                     \
+#define MBUF_XTEND(x)                          \
+  STMT_START {                                         \
        int nsz = (int) round_mgrow((x)+msiz);  \
        int offset = mptr - mbase;              \
        ASSERT(!cxt->membuf_ro, ("mbase is not read-only")); \
@@ -542,31 +567,35 @@ static stcxt_t *Context_ptr = &Context;
        msiz = nsz;                                             \
        mptr = mbase + offset;                  \
        mend = mbase + nsz;                             \
-} while (0)
+  } STMT_END
 
-#define MBUF_CHK(x) do {                       \
+#define MBUF_CHK(x)                            \
+  STMT_START {                                         \
        if ((mptr + (x)) > mend)                \
                MBUF_XTEND(x);                          \
-} while (0)
+  } STMT_END
 
-#define MBUF_GETC(x) do {                      \
+#define MBUF_GETC(x)                           \
+  STMT_START {                                         \
        if (mptr < mend)                                \
                x = (int) (unsigned char) *mptr++;      \
        else                                                    \
                return (SV *) 0;                        \
-} while (0)
+  } STMT_END
 
 #ifdef CRAY_HACK
-#define MBUF_GETINT(x) do {                            \
+#define MBUF_GETINT(x)                                         \
+  STMT_START {                                                 \
        oC(x);                                                          \
        if ((mptr + 4) <= mend) {                       \
                memcpy(oI(&x), mptr, 4);                \
                mptr += 4;                                              \
        } else                                                          \
                return (SV *) 0;                                \
-} while (0)
+  } STMT_END
 #else
-#define MBUF_GETINT(x) do {                            \
+#define MBUF_GETINT(x)                                         \
+  STMT_START {                                                 \
        if ((mptr + sizeof(int)) <= mend) {     \
                if (int_aligned(mptr))                  \
                        x = *(int *) mptr;                      \
@@ -575,18 +604,20 @@ static stcxt_t *Context_ptr = &Context;
                mptr += sizeof(int);                    \
        } else                                                          \
                return (SV *) 0;                                \
-} while (0)
+  } STMT_END
 #endif
 
-#define MBUF_READ(x,s) do {                    \
+#define MBUF_READ(x,s)                                 \
+  STMT_START {                                         \
        if ((mptr + (s)) <= mend) {             \
                memcpy(x, mptr, s);                     \
                mptr += s;                                      \
        } else                                                  \
                return (SV *) 0;                        \
-} while (0)
+  } STMT_END
 
-#define MBUF_SAFEREAD(x,s,z) do {      \
+#define MBUF_SAFEREAD(x,s,z)           \
+  STMT_START {                                         \
        if ((mptr + (s)) <= mend) {             \
                memcpy(x, mptr, s);                     \
                mptr += s;                                      \
@@ -594,39 +625,43 @@ static stcxt_t *Context_ptr = &Context;
                sv_free(z);                                     \
                return (SV *) 0;                        \
        }                                                               \
-} while (0)
+  } STMT_END
 
-#define MBUF_PUTC(c) do {                      \
+#define MBUF_PUTC(c)                           \
+  STMT_START {                                         \
        if (mptr < mend)                                \
                *mptr++ = (char) c;                     \
        else {                                                  \
                MBUF_XTEND(1);                          \
                *mptr++ = (char) c;                     \
        }                                                               \
-} while (0)
+  } STMT_END
 
 #ifdef CRAY_HACK
-#define MBUF_PUTINT(i) do {                    \
+#define MBUF_PUTINT(i)                                 \
+  STMT_START {                                         \
        MBUF_CHK(4);                                    \
        memcpy(mptr, oI(&i), 4);                \
        mptr += 4;                                              \
-} while (0)
+  } STMT_END
 #else
-#define MBUF_PUTINT(i) do {                    \
+#define MBUF_PUTINT(i)                                 \
+  STMT_START {                                         \
        MBUF_CHK(sizeof(int));                  \
        if (int_aligned(mptr))                  \
                *(int *) mptr = i;                      \
        else                                                    \
                memcpy(mptr, &i, sizeof(int));  \
        mptr += sizeof(int);                    \
-} while (0)
+  } STMT_END
 #endif
 
-#define MBUF_WRITE(x,s) do {           \
+#define MBUF_WRITE(x,s)                        \
+  STMT_START {                                         \
        MBUF_CHK(s);                                    \
        memcpy(mptr, x, s);                             \
        mptr += s;                                              \
-} while (0)
+  } STMT_END
 
 /*
  * Possible return values for sv_type().
@@ -727,23 +762,26 @@ static char magicstr[] = "pst0";                  /* Used as a magic number */
  * Useful store shortcuts...
  */
 
-#define PUTMARK(x) do {                                                \
+#define PUTMARK(x)                                                     \
+  STMT_START {                                                         \
        if (!cxt->fio)                                                  \
                MBUF_PUTC(x);                                           \
        else if (PerlIO_putc(cxt->fio, x) == EOF)       \
                return -1;                                                      \
-} while (0)
+  } STMT_END
 
-#define WRITE_I32(x)   do {                    \
+#define WRITE_I32(x)                                   \
+  STMT_START {                                                 \
        ASSERT(sizeof(x) == sizeof(I32), ("writing an I32"));   \
        if (!cxt->fio)                                          \
                MBUF_PUTINT(x);                                 \
        else if (PerlIO_write(cxt->fio, oI(&x), oS(sizeof(x))) != oS(sizeof(x))) \
                return -1;                                      \
-       } while (0)
+  } STMT_END
 
 #ifdef HAS_HTONL
-#define WLEN(x)        do {                            \
+#define WLEN(x)                                                \
+  STMT_START {                                         \
        if (cxt->netorder) {                    \
                int y = (int) htonl(x);         \
                if (!cxt->fio)                          \
@@ -756,19 +794,21 @@ static char magicstr[] = "pst0";                  /* Used as a magic number */
                else if (PerlIO_write(cxt->fio,oI(&x),oS(sizeof(x))) != oS(sizeof(x))) \
                        return -1;                              \
        }                                                               \
-} while (0)
+  } STMT_END
 #else
 #define WLEN(x)        WRITE_I32(x)
 #endif
 
-#define WRITE(x,y) do {                                                \
+#define WRITE(x,y)                                                     \
+  STMT_START {                                                         \
        if (!cxt->fio)                                                  \
                MBUF_WRITE(x,y);                                        \
        else if (PerlIO_write(cxt->fio, x, y) != y)     \
                return -1;                                                      \
-       } while (0)
+  } STMT_END
 
-#define STORE_PV_LEN(pv, len, small, large) do {       \
+#define STORE_PV_LEN(pv, len, small, large)                    \
+  STMT_START {                                                 \
        if (len <= LG_SCALAR) {                         \
                unsigned char clen = (unsigned char) len;       \
                PUTMARK(small);                                 \
@@ -780,17 +820,18 @@ static char magicstr[] = "pst0";                  /* Used as a magic number */
                WLEN(len);                                              \
                WRITE(pv, len);                                 \
        }                                                                       \
-} while (0)
+  } STMT_END
 
 #define STORE_SCALAR(pv, len)  STORE_PV_LEN(pv, len, SX_SCALAR, SX_LSCALAR)
 
 /*
  * Store undef in arrays and hashes without recursing through store().
  */
-#define STORE_UNDEF() do {                             \
+#define STORE_UNDEF()                                  \
+  STMT_START {                                                 \
        cxt->tagnum++;                                          \
        PUTMARK(SX_UNDEF);                                      \
-} while (0)
+  } STMT_END
 
 /*
  * Useful retrieve shortcuts...
@@ -799,24 +840,27 @@ static char magicstr[] = "pst0";                  /* Used as a magic number */
 #define GETCHAR() \
        (cxt->fio ? PerlIO_getc(cxt->fio) : (mptr >= mend ? EOF : (int) *mptr++))
 
-#define GETMARK(x) do {                                                        \
+#define GETMARK(x)                                                             \
+  STMT_START {                                                                 \
        if (!cxt->fio)                                                          \
                MBUF_GETC(x);                                                   \
        else if ((int) (x = PerlIO_getc(cxt->fio)) == EOF)      \
                return (SV *) 0;                                                \
-} while (0)
+  } STMT_END
 
-#define READ_I32(x)    do {                            \
+#define READ_I32(x)                                            \
+  STMT_START {                                                 \
        ASSERT(sizeof(x) == sizeof(I32), ("reading an I32"));   \
        oC(x);                                                          \
        if (!cxt->fio)                                          \
                MBUF_GETINT(x);                                 \
        else if (PerlIO_read(cxt->fio, oI(&x), oS(sizeof(x))) != oS(sizeof(x))) \
                return (SV *) 0;                                \
-} while (0)
+  } STMT_END
 
 #ifdef HAS_NTOHL
-#define RLEN(x)        do {                                    \
+#define RLEN(x)                                                        \
+  STMT_START {                                                 \
        oC(x);                                                          \
        if (!cxt->fio)                                          \
                MBUF_GETINT(x);                                 \
@@ -824,26 +868,28 @@ static char magicstr[] = "pst0";                  /* Used as a magic number */
                return (SV *) 0;                                \
        if (cxt->netorder)                                      \
                x = (int) ntohl(x);                             \
-} while (0)
+  } STMT_END
 #else
 #define RLEN(x) READ_I32(x)
 #endif
 
-#define READ(x,y) do {                                         \
+#define READ(x,y)                                                      \
+  STMT_START {                                                         \
        if (!cxt->fio)                                                  \
                MBUF_READ(x, y);                                        \
        else if (PerlIO_read(cxt->fio, x, y) != y)      \
                return (SV *) 0;                                        \
-} while (0)
+  } STMT_END
 
-#define SAFEREAD(x,y,z) do {                                   \
+#define SAFEREAD(x,y,z)                                                        \
+  STMT_START {                                                                 \
        if (!cxt->fio)                                                          \
                MBUF_SAFEREAD(x,y,z);                                   \
        else if (PerlIO_read(cxt->fio, x, y) != y)       {      \
                sv_free(z);                                                             \
                return (SV *) 0;                                                \
        }                                                                                       \
-} while (0)
+  } STMT_END
 
 /*
  * This macro is used at retrieve time, to remember where object 'y', bearing a
@@ -863,7 +909,8 @@ static char magicstr[] = "pst0";                    /* Used as a magic number */
  * recursively, and the first SEEN() call for which the class name is not NULL
  * will bless the object.
  */
-#define SEEN(y,c) do {                                         \
+#define SEEN(y,c)                                                      \
+  STMT_START {                                                         \
        if (!y)                                                                 \
                return (SV *) 0;                                        \
        if (av_store(cxt->aseen, cxt->tagnum++, SvREFCNT_inc(y)) == 0) \
@@ -872,12 +919,13 @@ static char magicstr[] = "pst0";                  /* Used as a magic number */
                 PTR2UV(y), SvREFCNT(y)-1));            \
        if (c)                                                                  \
                BLESS((SV *) (y), c);                           \
-} while (0)
+  } STMT_END
 
 /*
  * Bless `s' in `p', via a temporary reference, required by sv_bless().
  */
-#define BLESS(s,p) do {                                        \
+#define BLESS(s,p)                                                     \
+  STMT_START {                                                         \
        SV *ref;                                                                \
        HV *stash;                                                              \
        TRACEME(("blessing 0x%"UVxf" in %s", PTR2UV(s), (p))); \
@@ -886,7 +934,7 @@ static char magicstr[] = "pst0";                    /* Used as a magic number */
        (void) sv_bless(ref, stash);                    \
        SvRV(ref) = 0;                                                  \
        SvREFCNT_dec(ref);                                              \
-} while (0)
+  } STMT_END
 
 static int store();
 static SV *retrieve(stcxt_t *cxt, char *cname);
@@ -1204,6 +1252,9 @@ static void clean_store_context(stcxt_t *cxt)
                sv_free((SV *) hook_seen);
        }
 
+       cxt->forgive_me = -1;                   /* Fetched from perl if needed */
+       cxt->canonical = -1;                    /* Idem */
+
        reset_context(cxt);
 }
 
@@ -1249,6 +1300,7 @@ static void init_retrieve_context(stcxt_t *cxt, int optype, int is_tainted)
 #ifndef HAS_UTF8_ALL
         cxt->use_bytes = -1;           /* Fetched from perl if needed */
 #endif
+        cxt->accept_future_minor = -1; /* Fetched from perl if needed */
 }
 
 /*
@@ -1290,6 +1342,14 @@ static void clean_retrieve_context(stcxt_t *cxt)
                sv_free((SV *) hseen);          /* optional HV, for backward compat. */
        }
 
+#ifndef HAS_RESTRICTED_HASHES
+        cxt->derestrict = -1;          /* Fetched from perl if needed */
+#endif
+#ifndef HAS_UTF8_ALL
+        cxt->use_bytes = -1;           /* Fetched from perl if needed */
+#endif
+        cxt->accept_future_minor = -1; /* Fetched from perl if needed */
+
        reset_context(cxt);
 }
 
@@ -1335,8 +1395,8 @@ stcxt_t *parent_cxt;
 
        ASSERT(!parent_cxt->s_dirty, ("parent context clean"));
 
-       Newz(0, cxt, 1, stcxt_t);
-       cxt->prev = parent_cxt;
+       NEW_STORABLE_CXT_OBJ(cxt);
+       cxt->prev = parent_cxt->my_sv;
        SET_STCXT(cxt);
 
        ASSERT(!cxt->s_dirty, ("clean context"));
@@ -1353,19 +1413,14 @@ stcxt_t *parent_cxt;
 static void free_context(cxt)
 stcxt_t *cxt;
 {
-       stcxt_t *prev = cxt->prev;
+       stcxt_t *prev = (stcxt_t *)(cxt->prev ? SvPVX(SvRV(cxt->prev)) : 0);
 
        TRACEME(("free_context"));
 
        ASSERT(!cxt->s_dirty, ("clean context"));
        ASSERT(prev, ("not freeing root context"));
 
-       if (kbuf)
-               Safefree(kbuf);
-       if (mbase)
-               Safefree(mbase);
-
-       Safefree(cxt);
+       SvREFCNT_dec(cxt->my_sv);
        SET_STCXT(prev);
 
        ASSERT(cxt, ("context not void"));
@@ -1781,89 +1836,134 @@ static int store_scalar(stcxt_t *cxt, SV *sv)
                        pv = SvPV(sv, len);                     /* We know it's SvPOK */
                        goto string;                            /* Share code below */
                }
-       } else if (flags & SVp_POK) {           /* SvPOKp(sv) => string */
-               I32 wlen;                                               /* For 64-bit machines */
-               pv = SvPV(sv, len);
-
-               /*
-                * Will come here from below with pv and len set if double & netorder,
-                * or from above if it was readonly, POK and NOK but neither &PL_sv_yes
-                * nor &PL_sv_no.
-                */
-       string:
+       } else if (flags & SVf_POK) {
+            /* public string - go direct to string read.  */
+            goto string_readlen;
+        } else if (
+#if (PATCHLEVEL <= 6)
+            /* For 5.6 and earlier NV flag trumps IV flag, so only use integer
+               direct if NV flag is off.  */
+            (flags & (SVf_NOK | SVf_IOK)) == SVf_IOK
+#else
+            /* 5.7 rules are that if IV public flag is set, IV value is as
+               good, if not better, than NV value.  */
+            flags & SVf_IOK
+#endif
+            ) {
+            iv = SvIV(sv);
+            /*
+             * Will come here from below with iv set if double is an integer.
+             */
+          integer:
 
-               wlen = (I32) len;                               /* WLEN via STORE_SCALAR expects I32 */
-               if (SvUTF8 (sv))
-                       STORE_UTF8STR(pv, wlen);
-               else
-                       STORE_SCALAR(pv, wlen);
-               TRACEME(("ok (scalar 0x%"UVxf" '%s', length = %"IVdf")",
-                        PTR2UV(sv), SvPVX(sv), (IV)len));
+            /* Sorry. This isn't in 5.005_56 (IIRC) or earlier.  */
+#ifdef SVf_IVisUV
+            /* Need to do this out here, else 0xFFFFFFFF becomes iv of -1
+             * (for example) and that ends up in the optimised small integer
+             * case. 
+             */
+            if ((flags & SVf_IVisUV) && SvUV(sv) > IV_MAX) {
+                TRACEME(("large unsigned integer as string, value = %"UVuf, SvUV(sv)));
+                goto string_readlen;
+            }
+#endif
+            /*
+             * Optimize small integers into a single byte, otherwise store as
+             * a real integer (converted into network order if they asked).
+             */
 
-       } else if (flags & SVp_NOK) {           /* SvNOKp(sv) => double */
-               NV nv = SvNV(sv);
+            if (iv >= -128 && iv <= 127) {
+                unsigned char siv = (unsigned char) (iv + 128);        /* [0,255] */
+                PUTMARK(SX_BYTE);
+                PUTMARK(siv);
+                TRACEME(("small integer stored as %d", siv));
+            } else if (cxt->netorder) {
+#ifndef HAS_HTONL
+                TRACEME(("no htonl, fall back to string for integer"));
+                goto string_readlen;
+#else
+                I32 niv;
 
-               /*
-                * Watch for number being an integer in disguise.
-                */
-               if (nv == (NV) (iv = I_V(nv))) {
-                       TRACEME(("double %"NVff" is actually integer %"IVdf, nv, iv));
-                       goto integer;           /* Share code below */
-               }
 
-               if (cxt->netorder) {
-                       TRACEME(("double %"NVff" stored as string", nv));
-                       pv = SvPV(sv, len);
-                       goto string;            /* Share code above */
-               }
+#if IVSIZE > 4
+                if (
+#ifdef SVf_IVisUV
+                    /* Sorry. This isn't in 5.005_56 (IIRC) or earlier.  */
+                    ((flags & SVf_IVisUV) && SvUV(sv) > 0x7FFFFFFF) ||
+#endif
+                    (iv > 0x7FFFFFFF) || (iv < -0x80000000)) {
+                    /* Bigger than 32 bits.  */
+                    TRACEME(("large network order integer as string, value = %"IVdf, iv));
+                    goto string_readlen;
+                }
+#endif
 
-               PUTMARK(SX_DOUBLE);
-               WRITE(&nv, sizeof(nv));
+                niv = (I32) htonl((I32) iv);
+                TRACEME(("using network order"));
+                PUTMARK(SX_NETINT);
+                WRITE_I32(niv);
+#endif
+            } else {
+                PUTMARK(SX_INTEGER);
+                WRITE(&iv, sizeof(iv));
+            }
+            
+            TRACEME(("ok (integer 0x%"UVxf", value = %"IVdf")", PTR2UV(sv), iv));
+       } else if (flags & SVf_NOK) {
+            NV nv;
+#if (PATCHLEVEL <= 6)
+            nv = SvNV(sv);
+            /*
+             * Watch for number being an integer in disguise.
+             */
+            if (nv == (NV) (iv = I_V(nv))) {
+                TRACEME(("double %"NVff" is actually integer %"IVdf, nv, iv));
+                goto integer;          /* Share code above */
+            }
+#else
 
-               TRACEME(("ok (double 0x%"UVxf", value = %"NVff")", PTR2UV(sv), nv));
+            SvIV_please(sv);
+            if (SvIOK(sv)) {
+                iv = SvIV(sv);
+                goto integer;          /* Share code above */
+            }
+            nv = SvNV(sv);
+#endif
 
-       } else if (flags & SVp_IOK) {           /* SvIOKp(sv) => integer */
-               iv = SvIV(sv);
+            if (cxt->netorder) {
+                TRACEME(("double %"NVff" stored as string", nv));
+                goto string_readlen;           /* Share code below */
+            }
 
-               /*
-                * Will come here from above with iv set if double is an integer.
-                */
-       integer:
+            PUTMARK(SX_DOUBLE);
+            WRITE(&nv, sizeof(nv));
 
-               /*
-                * Optimize small integers into a single byte, otherwise store as
-                * a real integer (converted into network order if they asked).
-                */
+            TRACEME(("ok (double 0x%"UVxf", value = %"NVff")", PTR2UV(sv), nv));
 
-               if (iv >= -128 && iv <= 127) {
-                       unsigned char siv = (unsigned char) (iv + 128); /* [0,255] */
-                       PUTMARK(SX_BYTE);
-                       PUTMARK(siv);
-                       TRACEME(("small integer stored as %d", siv));
-               } else if (cxt->netorder) {
-                       I32 niv;
-#ifdef HAS_HTONL
-                       niv = (I32) htonl(iv);
-                       TRACEME(("using network order"));
-#else
-                       niv = (I32) iv;
-                       TRACEME(("as-is for network order"));
-#endif
-                       PUTMARK(SX_NETINT);
-                       WRITE_I32(niv);
-               } else {
-                       PUTMARK(SX_INTEGER);
-                       WRITE(&iv, sizeof(iv));
-               }
+       } else if (flags & (SVp_POK | SVp_NOK | SVp_IOK)) {
+            I32 wlen; /* For 64-bit machines */
 
-               TRACEME(("ok (integer 0x%"UVxf", value = %"IVdf")", PTR2UV(sv), iv));
+          string_readlen:
+            pv = SvPV(sv, len);
 
+            /*
+             * Will come here from above  if it was readonly, POK and NOK but
+             * neither &PL_sv_yes nor &PL_sv_no.
+             */
+          string:
+
+            wlen = (I32) len; /* WLEN via STORE_SCALAR expects I32 */
+            if (SvUTF8 (sv))
+                STORE_UTF8STR(pv, wlen);
+            else
+                STORE_SCALAR(pv, wlen);
+            TRACEME(("ok (scalar 0x%"UVxf" '%s', length = %"IVdf")",
+                     PTR2UV(sv), SvPVX(sv), (IV)len));
        } else
-               CROAK(("Can't determine type of %s(0x%"UVxf")",
-                      sv_reftype(sv, FALSE),
-                      PTR2UV(sv)));
-
-       return 0;               /* Ok, no recursion on scalars */
+            CROAK(("Can't determine type of %s(0x%"UVxf")",
+                   sv_reftype(sv, FALSE),
+                   PTR2UV(sv)));
+        return 0;              /* Ok, no recursion on scalars */
 }
 
 /*
@@ -2899,7 +2999,7 @@ static int store_other(stcxt_t *cxt, SV *sv)
 
        len = strlen(buf);
        STORE_SCALAR(buf, len);
-       TRACEME(("ok (dummy \"%s\", length = %"IVdf")", buf, len));
+       TRACEME(("ok (dummy \"%s\", length = %"IVdf")", buf, (IV) len));
 
        return 0;
 }
@@ -3729,7 +3829,7 @@ static SV *retrieve_hook(stcxt_t *cxt, char *cname)
         */
 
        TRACEME(("calling STORABLE_thaw on %s at 0x%"UVxf" (%"IVdf" args)",
-                class, PTR2UV(sv), AvFILLp(av) + 1));
+                class, PTR2UV(sv), (IV) AvFILLp(av) + 1));
 
        rv = newRV(sv);
        (void) scalar_call(rv, hook, clone, av, G_SCALAR|G_DISCARD);
@@ -4070,7 +4170,7 @@ static SV *retrieve_lscalar(stcxt_t *cxt, char *cname)
        SV *sv;
 
        RLEN(len);
-       TRACEME(("retrieve_lscalar (#%d), len = %"IVdf, cxt->tagnum, len));
+       TRACEME(("retrieve_lscalar (#%d), len = %"IVdf, cxt->tagnum, (IV) len));
 
        /*
         * Allocate an empty scalar of the suitable length.
@@ -4095,7 +4195,7 @@ static SV *retrieve_lscalar(stcxt_t *cxt, char *cname)
        if (cxt->s_tainted)                             /* Is input source tainted? */
                SvTAINT(sv);                            /* External data cannot be trusted */
 
-       TRACEME(("large scalar len %"IVdf" '%s'", len, SvPVX(sv)));
+       TRACEME(("large scalar len %"IVdf" '%s'", (IV) len, SvPVX(sv)));
        TRACEME(("ok (retrieve_lscalar at 0x%"UVxf")", PTR2UV(sv)));
 
        return sv;
@@ -4891,12 +4991,26 @@ magic_ok:
                        (version_major == STORABLE_BIN_MAJOR &&
                        version_minor > STORABLE_BIN_MINOR)
             ) {
-               TRACEME(("but I am version is %d.%d", STORABLE_BIN_MAJOR,
-                         STORABLE_BIN_MINOR));
-
+            int croak_now = 1;
+            TRACEME(("but I am version is %d.%d", STORABLE_BIN_MAJOR,
+                     STORABLE_BIN_MINOR));
+
+            if (version_major == STORABLE_BIN_MAJOR) {
+                TRACEME(("cxt->accept_future_minor is %d",
+                         cxt->accept_future_minor));
+                if (cxt->accept_future_minor < 0)
+                    cxt->accept_future_minor
+                        = (SvTRUE(perl_get_sv("Storable::accept_future_minor",
+                                              TRUE))
+                           ? 1 : 0);
+                if (cxt->accept_future_minor == 1)
+                    croak_now = 0;  /* Don't croak yet.  */
+            }
+            if (croak_now) {
                CROAK(("Storable binary image v%d.%d more recent than I am (v%d.%d)",
-                       version_major, version_minor,
-                       STORABLE_BIN_MAJOR, STORABLE_BIN_MINOR));
+                       version_major, version_minor,
+                       STORABLE_BIN_MAJOR, STORABLE_BIN_MINOR));
+            }
         }
 
        /*
@@ -5034,7 +5148,19 @@ static SV *retrieve(stcxt_t *cxt, char *cname)
                TRACEME(("had retrieved #%d at 0x%"UVxf, tag, PTR2UV(sv)));
                SvREFCNT_inc(sv);       /* One more reference to this same sv */
                return sv;                      /* The SV pointer where object was retrieved */
-       }
+       } else if (type >= SX_ERROR && cxt->ver_minor > STORABLE_BIN_MINOR) {
+            if (cxt->accept_future_minor < 0)
+                cxt->accept_future_minor
+                    = (SvTRUE(perl_get_sv("Storable::accept_future_minor",
+                                          TRUE))
+                       ? 1 : 0);
+            if (cxt->accept_future_minor == 1) {
+                CROAK(("Storable binary image v%d.%d contains data of type %d. "
+                       "This Storable is v%d.%d and can only handle data types up to %d",
+                       cxt->ver_major, cxt->ver_minor, type,
+                       STORABLE_BIN_MAJOR, STORABLE_BIN_MINOR, SX_ERROR - 1));
+            }
+        }
 
 first_time:            /* Will disappear when support for old format is dropped */
 
@@ -5380,12 +5506,32 @@ SV *dclone(SV *sv)
 #define InputStream            PerlIO *
 #endif /* !OutputStream */
 
+MODULE = Storable      PACKAGE = Storable::Cxt
+
+void
+DESTROY(self)
+    SV *self
+PREINIT:
+       stcxt_t *cxt = (stcxt_t *)SvPVX(SvRV(self));
+PPCODE:
+       if (kbuf)
+               Safefree(kbuf);
+       if (!cxt->membuf_ro && mbase)
+               Safefree(mbase);
+       if (cxt->membuf_ro && (cxt->msaved).arena)
+               Safefree((cxt->msaved).arena);
+
+
 MODULE = Storable      PACKAGE = Storable
 
 PROTOTYPES: ENABLE
 
 BOOT:
     init_perinterp();
+#ifdef DEBUGME
+    /* Only disable the used only once warning if we are in debugging mode.  */
+    gv_fetchpv("Storable::DEBUGME",   GV_ADDMULTI, SVt_PV);
+#endif
 
 int
 pstore(f,obj)