regcomp.c: Simply some node calculations

[perl5.git] / op_reg_common.h

diff --git a/op_reg_common.h b/op_reg_common.h
index 238d7bd..8a45b20 100644 (file)
--- a/op_reg_common.h
+++ b/op_reg_common.h
@@ -2,7 +2,7 @@
  *
  *    Definitions common to by op.h and regexp.h
  *
- *    Copyright (C) 2010 by Larry Wall and others
+ *    Copyright (C) 2010, 2011 by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -18,7 +18,7 @@
 /* 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 lib/re.pm when changing this! */
+/* 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
@@ -32,16 +32,64 @@
 #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 */
-#define RXf_PMf_LOCALE         (1 << (RXf_PMf_STD_PMMOD_SHIFT+5))
-#define RXf_PMf_UNICODE        (1 << (RXf_PMf_STD_PMMOD_SHIFT+6))
+
+/* 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 and regcomp.sym (as these are used as
+ * offsets for various node types, like SPACE vs SPACEL, etc) 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 */
+
+/* Manually decorate these functions here with gcc-style attributes just to
+ * avoid making the regex_charset typedef global, which it would need to be for
+ * proto.h to understand it */
+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+7)
+#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_LOCALE|RXf_PMf_FOLD|RXf_PMf_EXTENDED|RXf_PMf_KEEPCOPY|RXf_PMf_UNICODE)
+#define RXf_PMf_COMPILETIME    (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_CHARSET|RXf_PMf_FOLD|RXf_PMf_EXTENDED|RXf_PMf_KEEPCOPY)
+
+#if RXf_PMf_COMPILETIME > 255
+#  error RXf_PMf_COMPILETIME wont fit in U8 flags field of eval node
+#endif
 
 /* These copies need to be numerical or defsubs_h.PL won't know about them. */
 #define PMf_MULTILINE    1<<0
@@ -49,9 +97,8 @@
 #define PMf_FOLD         1<<2
 #define PMf_EXTENDED     1<<3
 #define PMf_KEEPCOPY     1<<4
-#define PMf_LOCALE       1<<5
 
-#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 || PMf_LOCALE != RXf_PMf_LOCALE
+#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