*/
/* These defines are used in both op.h and regexp.h The definitions use the
- * shift form so that ext/B/defsubs_h.PL will pick them up */
-#define RXf_PMf_MULTILINE (1 << 0) /* /m */
-#define PMf_MULTILINE (1 << 0) /* /m */
-#define RXf_PMf_SINGLELINE (1 << 1) /* /s */
-#define PMf_SINGLELINE (1 << 1) /* /s */
-#define RXf_PMf_FOLD (1 << 2) /* /i */
-#define PMf_FOLD (1 << 2) /* /i */
-#define RXf_PMf_EXTENDED (1 << 3) /* /x */
-#define PMf_EXTENDED (1 << 3) /* /x */
-#define RXf_PMf_KEEPCOPY (1 << 4) /* /p */
-#define PMf_KEEPCOPY (1 << 4) /* /p */
-#define RXf_PMf_LOCALE (1 << 5)
-#define PMf_LOCALE (1 << 5)
-
-#define _RXf_PMf_SHIFT 5 /* Begins with '_' so won't be exported by B */
+ * shift form so that ext/B/defsubs_h.PL will pick them up.
+ *
+ * Data structures used in the two headers have common fields, and in fact one
+ * is copied onto the other. This makes it easy to keep them in sync */
+
+/* This tells where the first of these bits is. Setting it to 0 saved cycles
+ * and memory. I (khw) think the code will work if changed back, but haven't
+ * tested it */
+/* Make sure to update ext/re/re.pm when changing this! */
+#ifndef RXf_PMf_STD_PMMOD_SHIFT /* Only expand #include of this file once */
+
+#define RXf_PMf_STD_PMMOD_SHIFT 0
+
+/* The bits need to be ordered so that the msix are contiguous starting at bit
+ * RXf_PMf_STD_PMMOD_SHIFT, followed by the p. See STD_PAT_MODS and
+ * INT_PAT_MODS in regexp.h for the reason contiguity is needed */
+/* Make sure to update lib/re.pm when changing these! */
+#define RXf_PMf_MULTILINE (1 << (RXf_PMf_STD_PMMOD_SHIFT+0)) /* /m */
+#define RXf_PMf_SINGLELINE (1 << (RXf_PMf_STD_PMMOD_SHIFT+1)) /* /s */
+#define RXf_PMf_FOLD (1 << (RXf_PMf_STD_PMMOD_SHIFT+2)) /* /i */
+#define RXf_PMf_EXTENDED (1 << (RXf_PMf_STD_PMMOD_SHIFT+3)) /* /x */
+#define RXf_PMf_KEEPCOPY (1 << (RXf_PMf_STD_PMMOD_SHIFT+4)) /* /p */
+
+/* The character set for the regex is stored in a field of more than one bit
+ * using an enum, for reasons of compactness and to ensure that the options are
+ * mutually exclusive */
+/* Make sure to update ext/re/re.pm when changing this! */
+typedef enum {
+ REGEX_DEPENDS_CHARSET = 0,
+ REGEX_LOCALE_CHARSET,
+ REGEX_UNICODE_CHARSET,
+ REGEX_ASCII_RESTRICTED_CHARSET,
+ REGEX_ASCII_MORE_RESTRICTED_CHARSET
+} regex_charset;
+
+#define _RXf_PMf_CHARSET_SHIFT ((RXf_PMf_STD_PMMOD_SHIFT)+5)
+#define RXf_PMf_CHARSET (7 << (_RXf_PMf_CHARSET_SHIFT)) /* 3 bits */
+
+/* embed.pl doesn't yet know how to handle static inline functions, so
+ manually decorate them here with gcc-style attributes.
+*/
+PERL_STATIC_INLINE void
+set_regex_charset(U32 * const flags, const regex_charset cs)
+ __attribute__nonnull__(1);
+
+PERL_STATIC_INLINE void
+set_regex_charset(U32 * const flags, const regex_charset cs)
+{
+ /* Sets the character set portion of 'flags' to 'cs', which is a member of
+ * the above enum */
+
+ *flags &= ~RXf_PMf_CHARSET;
+ *flags |= (cs << _RXf_PMf_CHARSET_SHIFT);
+}
+
+PERL_STATIC_INLINE regex_charset
+get_regex_charset(const U32 flags)
+ __attribute__warn_unused_result__;
+
+PERL_STATIC_INLINE regex_charset
+get_regex_charset(const U32 flags)
+{
+ /* Returns the enum corresponding to the character set in 'flags' */
+
+ return (regex_charset) ((flags & RXf_PMf_CHARSET) >> _RXf_PMf_CHARSET_SHIFT);
+}
+
+/* Next available bit after the above. Name begins with '_' so won't be
+ * exported by B */
+#define _RXf_PMf_SHIFT_NEXT (RXf_PMf_STD_PMMOD_SHIFT+8)
+
+/* Mask of the above bits. These need to be transferred from op_pmflags to
+ * re->extflags during compilation */
+#define RXf_PMf_COMPILETIME (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_CHARSET|RXf_PMf_FOLD|RXf_PMf_EXTENDED|RXf_PMf_KEEPCOPY)
+
+/* These copies need to be numerical or defsubs_h.PL won't know about them. */
+#define PMf_MULTILINE 1<<0
+#define PMf_SINGLELINE 1<<1
+#define PMf_FOLD 1<<2
+#define PMf_EXTENDED 1<<3
+#define PMf_KEEPCOPY 1<<4
+
+#if PMf_MULTILINE != RXf_PMf_MULTILINE || PMf_SINGLELINE != RXf_PMf_SINGLELINE || PMf_FOLD != RXf_PMf_FOLD || PMf_EXTENDED != RXf_PMf_EXTENDED || PMf_KEEPCOPY != RXf_PMf_KEEPCOPY
+# error RXf_PMf defines are wrong
+#endif
+
+#define PMf_COMPILETIME RXf_PMf_COMPILETIME
+
+/* Error check that haven't left something out of this. This isn't done
+ * directly in the #define because doing so confuses regcomp.pl.
+ * (2**n - 1) is n 1 bits, so the below gets the contiguous bits between the
+ * beginning and ending shifts */
+#if RXf_PMf_COMPILETIME != (((1 << (_RXf_PMf_SHIFT_NEXT))-1) \
+ & (~((1 << RXf_PMf_STD_PMMOD_SHIFT)-1)))
+# error RXf_PMf_COMPILETIME is invalid
+#endif
+
+#endif /* Include only once */
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