In debugger, don't reference %{$f{$g}} if $f{$g} doesn't exist

[p5sagit/p5-mst-13.2.git] / XSUB.h

diff --git a/XSUB.h b/XSUB.h
index a8a193b..d15af1f 100644 (file)
--- a/XSUB.h
+++ b/XSUB.h
@@ -1 +1,59 @@
-#define ST(s) stack_base[ax + s]
+#define ST(off) stack_base[ax + (off)]
+
+#ifdef CAN_PROTOTYPE
+#define XS(name) void name(CV* cv)
+#else
+#define XS(name) void name(cv) CV* cv;
+#endif
+
+#define dXSARGS                                \
+       dSP; dMARK;                     \
+       I32 ax = mark - stack_base + 1; \
+       I32 items = sp - mark
+
+#define XSANY CvXSUBANY(cv)
+
+#define dXSI32 I32 ix = XSANY.any_i32
+
+#define XSRETURN(off) stack_sp = stack_base + ax + ((off) - 1); return
+
+/* Simple macros to put new mortal values onto the stack.   */
+/* Typically used to return values from XS functions.       */
+#define XST_mIV(i,v)  (ST(i) = sv_2mortal(newSViv(v))  )
+#define XST_mNV(i,v)  (ST(i) = sv_2mortal(newSVnv(v))  )
+#define XST_mPV(i,v)  (ST(i) = sv_2mortal(newSVpv(v,0)))
+#define XST_mNO(i)    (ST(i) = &sv_no   )
+#define XST_mYES(i)   (ST(i) = &sv_yes  )
+#define XST_mUNDEF(i) (ST(i) = &sv_undef)
+ 
+#define XSRETURN_IV(v) STMT_START { XST_mIV(0,v);  XSRETURN(1); } STMT_END
+#define XSRETURN_NV(v) STMT_START { XST_mNV(0,v);  XSRETURN(1); } STMT_END
+#define XSRETURN_PV(v) STMT_START { XST_mPV(0,v);  XSRETURN(1); } STMT_END
+#define XSRETURN_NO    STMT_START { XST_mNO(0);    XSRETURN(1); } STMT_END
+#define XSRETURN_YES   STMT_START { XST_mYES(0);   XSRETURN(1); } STMT_END
+#define XSRETURN_UNDEF STMT_START { XST_mUNDEF(0); XSRETURN(1); } STMT_END
+#define XSRETURN_EMPTY STMT_START {                XSRETURN(0); } STMT_END
+
+#define newXSproto(a,b,c,d)    sv_setpv((SV*)newXS(a,b,c), d)
+
+#ifdef XS_VERSION
+# define XS_VERSION_BOOTCHECK \
+    STMT_START {                                                       \
+       char vn[255], *module = SvPV(ST(0),na);                         \
+       if (items >= 2)  /* version supplied as bootstrap arg */        \
+           Sv = ST(1);                                                 \
+       else {                                                          \
+           sprintf(vn,"%s::XS_VERSION", module);                       \
+           Sv = perl_get_sv(vn, FALSE);   /* XXX GV_ADDWARN */         \
+           if (!Sv || !SvOK(Sv)) {                                     \
+               sprintf(vn,"%s::VERSION", module);                      \
+               Sv = perl_get_sv(vn, FALSE);   /* XXX GV_ADDWARN */     \
+           }                                                           \
+       }                                                               \
+       if (Sv && (!SvOK(Sv) || strNE(XS_VERSION, SvPV(Sv, na))))       \
+           croak("%s object version %s does not match $%s %s",         \
+                 module, XS_VERSION, vn, SvPV(Sv, na));                \
+    } STMT_END
+#else
+# define XS_VERSION_BOOTCHECK
+#endif