Re: [PATCH] More regex optimisations and debug enhancements (including Andys stuff...

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

diff --git a/perl.h b/perl.h
index 8e8d67b..cdb2b86 100644 (file)
--- a/perl.h
+++ b/perl.h
@@ -34,7 +34,11 @@
 #ifdef PERL_MICRO
 #   include "uconfig.h"
 #else
-#   include "config.h"
+#   ifndef USE_CROSS_COMPILE
+#       include "config.h"
+#   else
+#       include "xconfig.h"
+#   endif
 #endif
 
 /* See L<perlguts/"The Perl API"> for detailed notes on
@@ -344,11 +348,17 @@ register struct op *Perl_op asm(stringify(OP_IN_REGISTER));
 #endif
 
 #if defined(PERL_GCC_PEDANTIC)
-#  if !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
+#  ifndef PERL_GCC_BRACE_GROUPS_FORBIDDEN
 #    define PERL_GCC_BRACE_GROUPS_FORBIDDEN
 #  endif
 #endif
 
+#if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN) && !defined(__cplusplus)
+#  ifndef PERL_USE_GCC_BRACE_GROUPS
+#    define PERL_USE_GCC_BRACE_GROUPS
+#  endif
+#endif
+
 /*
  * STMT_START { statements; } STMT_END;
  * can be used as a single statement, as in
@@ -357,7 +367,7 @@ register struct op *Perl_op asm(stringify(OP_IN_REGISTER));
  * Trying to select a version that gives no warnings...
  */
 #if !(defined(STMT_START) && defined(STMT_END))
-# if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN) && !defined(__cplusplus)
+# ifdef PERL_USE_GCC_BRACE_GROUPS
 #   define STMT_START  (void)( /* gcc supports "({ STATEMENTS; })" */
 #   define STMT_END    )
 # else
@@ -1435,14 +1445,47 @@ int sockatmark(int);
 */
 #ifdef SPRINTF_RETURNS_STRLEN
 #  define my_sprintf sprintf
-#  ifdef HAS_SNPRINTF
-#    define USE_SNPRINTF
+#else
+#  define my_sprintf Perl_my_sprintf
+#endif
+
+/*
+ * If we have v?snprintf() and the C99 variadic macros, we can just
+ * use just the v?snprintf().  It is nice to try to trap the buffer
+ * overflow, however, so if we are DEBUGGING, and we cannot use the
+ * gcc brace groups, then use the function wrappers which try to trap
+ * the overflow.  If we can use the gcc brace groups, we can try that
+ * even with the version that uses the C99 variadic macros.
+ */
+
+/* Note that we do not check against snprintf()/vsnprintf() returning
+ * negative values because that is non-standard behaviour and we use
+ * snprintf/vsnprintf only iff HAS_VSNPRINTF has been defined, and
+ * that should be true only if the snprintf()/vsnprintf() are true
+ * to the standard. */
+
+#if defined(HAS_SNPRINTF) && defined(HAS_C99_VARIADIC_MACROS) && !(defined(DEBUGGING) && !defined(PERL_USE_GCC_BRACE_GROUPS))
+#  ifdef PERL_USE_GCC_BRACE_GROUPS
+#      define my_snprintf(buffer, len, ...) ({ int __len__ = snprintf(buffer, len, __VA_ARGS__); if ((len) > 0 && __len__ >= (len)) Perl_croak(aTHX_ "panic: snprintf buffer overflow"); __len__; })
+#      define PERL_MY_SNPRINTF_GUARDED
+#  else
+#    define my_snprintf(buffer, len, ...) snprintf(buffer, len, __VA_ARGS__)
 #  endif
-#  ifdef HAS_VSNPRINTF
-#    define USE_VSNPRINTF
+#else
+#  define my_snprintf  Perl_my_snprintf
+#  define PERL_MY_SNPRINTF_GUARDED
+#endif
+
+#if defined(HAS_VSNPRINTF) && defined(HAS_C99_VARIADIC_MACROS) && !(defined(DEBUGGING) && !defined(PERL_USE_GCC_BRACE_GROUPS))
+#  ifdef PERL_USE_GCC_BRACE_GROUPS
+#      define my_vsnprintf(buffer, len, ...) ({ int __len__ = vsnprintf(buffer, len, __VA_ARGS__); if ((len) > 0 && __len__ >= (len)) Perl_croak(aTHX_ "panic: vsnprintf buffer overflow"); __len__; })
+#      define PERL_MY_VSNPRINTF_GUARDED
+#  else
+#    define my_vsnprintf(buffer, len, ...) vsnprintf(buffer, len, __VA_ARGS__)
 #  endif
 #else
-#  define my_sprintf Perl_my_sprintf
+#  define my_vsnprintf Perl_my_vsnprintf
+#  define PERL_MY_VSNPRINTF_GUARDED
 #endif
 
 /* Configure gets this right but the UTS compiler gets it wrong.
@@ -4165,14 +4208,15 @@ enum {          /* pass one of these to get_vtbl */
     want_vtbl_hintselem
 };
 
-                               /* Note: the lowest 8 bits are reserved for
-                                  stuffing into op->op_private */
-#define HINT_PRIVATE_MASK      0x000000ff
+
+/* Hints are now stored in a dedicated U32, so the bottom 8 bits are no longer
+   special and there is no need for HINT_PRIVATE_MASK for COPs
+   However, bitops store HINT_INTEGER in their op_private.  */
 #define HINT_INTEGER           0x00000001 /* integer pragma */
 #define HINT_STRICT_REFS       0x00000002 /* strict pragma */
 #define HINT_LOCALE            0x00000004 /* locale pragma */
 #define HINT_BYTES             0x00000008 /* bytes pragma */
-/* #define HINT_notused10      0x00000010 */
+#define HINT_ARYBASE           0x00000010 /* $[ is non-zero */
                                /* Note: 20,40,80 used for NATIVE_HINTS */
                                /* currently defined by vms/vmsish.h */
 
@@ -4187,6 +4231,7 @@ enum {            /* pass one of these to get_vtbl */
 #define HINT_NEW_STRING                0x00008000
 #define HINT_NEW_RE            0x00010000
 #define HINT_LOCALIZE_HH       0x00020000 /* %^H needs to be copied */
+#define HINT_LEXICAL_IO                0x00040000 /* ${^OPEN} is set */
 
 #define HINT_RE_TAINT          0x00100000 /* re pragma */
 #define HINT_RE_EVAL           0x00200000 /* re pragma */