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-rw-r--r--Master/tlpkg/tlperl/lib/CORE/regcomp.h265
1 files changed, 175 insertions, 90 deletions
diff --git a/Master/tlpkg/tlperl/lib/CORE/regcomp.h b/Master/tlpkg/tlperl/lib/CORE/regcomp.h
index 21d2e1e3519..3bb1a533f69 100644
--- a/Master/tlpkg/tlperl/lib/CORE/regcomp.h
+++ b/Master/tlpkg/tlperl/lib/CORE/regcomp.h
@@ -26,13 +26,6 @@
#define RE_TRACK_PATTERN_OFFSETS
#endif
-/* Unless the next line is uncommented it is illegal to combine lazy
- matching with possessive matching. Frankly it doesn't make much sense
- to allow it as X*?+ matches nothing, X+?+ matches a single char only,
- and X{min,max}?+ matches min times only.
- */
-/* #define REG_ALLOW_MINMOD_SUSPEND */
-
/*
* The "internal use only" fields in regexp.h are present to pass info from
* compile to execute that permits the execute phase to run lots faster on
@@ -132,13 +125,28 @@
*
* See regexp.h for flags used externally to the regexp engine
*/
+#define RXp_INTFLAGS(rx) ((rx)->intflags)
+#define RX_INTFLAGS(prog) RXp_INTFLAGS(ReANY(prog))
+
#define PREGf_SKIP 0x00000001
#define PREGf_IMPLICIT 0x00000002 /* Converted .* to ^.* */
#define PREGf_NAUGHTY 0x00000004 /* how exponential is this pattern? */
#define PREGf_VERBARG_SEEN 0x00000008
#define PREGf_CUTGROUP_SEEN 0x00000010
#define PREGf_USE_RE_EVAL 0x00000020 /* compiled with "use re 'eval'" */
+/* these used to be extflags, but are now intflags */
+#define PREGf_NOSCAN 0x00000040
+#define PREGf_CANY_SEEN 0x00000080
+#define PREGf_GPOS_SEEN 0x00000100
+#define PREGf_GPOS_FLOAT 0x00000200
+
+#define PREGf_ANCH_BOL 0x00000400
+#define PREGf_ANCH_MBOL 0x00000800
+#define PREGf_ANCH_SBOL 0x00001000
+#define PREGf_ANCH_GPOS 0x00002000
+#define PREGf_ANCH (PREGf_ANCH_SBOL | PREGf_ANCH_GPOS | \
+ PREGf_ANCH_MBOL | PREGf_ANCH_BOL )
/* this is where the old regcomp.h started */
@@ -177,27 +185,73 @@ struct regnode_2 {
};
-#define ANYOF_BITMAP_SIZE 32 /* 256 b/(8 b/B) */
+#define ANYOF_BITMAP_SIZE (256 / 8) /* 8 bits/Byte */
+
+/* Note that these form structs which are supersets of the next smaller one, by
+ * appending fields. Alignment problems can occur if one of those optional
+ * fields requires stricter alignment than the base struct. And formal
+ * parameters that can really be two or more of the structs should be
+ * declared as the smallest one it could be. See commit message for
+ * 7dcac5f6a5195002b55c935ee1d67f67e1df280b. Regnode allocation is done
+ * without regard to alignment, and changing it to would also require changing
+ * the code that inserts and deletes regnodes. The basic single-argument
+ * regnode has a U32, which is what reganode() allocates as a unit. Therefore
+ * no field can require stricter alignment than U32. */
/* also used by trie */
struct regnode_charclass {
U8 flags;
U8 type;
U16 next_off;
- U32 arg1; /* used as ptr in S_regclass */
+ U32 arg1;
char bitmap[ANYOF_BITMAP_SIZE]; /* only compile-time */
};
/* has runtime (locale) \d, \w, ..., [:posix:] classes */
struct regnode_charclass_class {
- U8 flags; /* ANYOF_CLASS bit must go here */
+ U8 flags; /* ANYOF_POSIXL bit must go here */
U8 type;
U16 next_off;
- U32 arg1; /* used as ptr in S_regclass */
+ U32 arg1;
char bitmap[ANYOF_BITMAP_SIZE]; /* both compile-time */
U32 classflags; /* and run-time */
};
+/* A synthetic start class (SSC); is a regnode_charclass_posixl_fold, plus an
+ * extra SV*, used only during its construction and which is not used by
+ * regexec.c. Note that the 'next_off' field is unused, as the SSC stands
+ * alone, so there is never a next node. Also, there is no alignment issue,
+ * becase these are declared or allocated as a complete unit so the compiler
+ * takes care of alignment. This is unlike the other regnodes which are
+ * allocated in terms of multiples of a single-argument regnode. SSC nodes can
+ * have a pointer field because there is no alignment issue, and because it is
+ * set to NULL after construction, before any cloning of the pattern */
+struct regnode_ssc {
+ U8 flags; /* ANYOF_POSIXL bit must go here */
+ U8 type;
+ U16 next_off;
+ U32 arg1;
+ char bitmap[ANYOF_BITMAP_SIZE]; /* both compile-time */
+ U32 classflags; /* and run-time */
+
+ /* Auxiliary, only used during construction; NULL afterwards: list of code
+ * points matched */
+ SV* invlist;
+};
+
+/* We take advantage of 'next_off' not otherwise being used in the SSC by
+ * actually using it: by setting it to 1. This allows us to test and
+ * distinguish between an SSC and other ANYOF node types, as 'next_off' cannot
+ * otherwise be 1, because it is the offset to the next regnode expressed in
+ * units of regnodes. Since an ANYOF node contains extra fields, it adds up
+ * to 12 regnode units on 32-bit systems, (hence the minimum this can be (if
+ * not 0) is 11 there. Even if things get tightly packed on a 64-bit system,
+ * it still would be more than 1. */
+#define set_ANYOF_SYNTHETIC(n) STMT_START{ OP(n) = ANYOF; \
+ NEXT_OFF(n) = 1; \
+ } STMT_END
+#define is_ANYOF_SYNTHETIC(n) (OP(n) == ANYOF && NEXT_OFF(n) == 1)
+
/* XXX fix this description.
Impose a limit of REG_INFTY on various pattern matching operations
to limit stack growth and to avoid "infinite" recursions.
@@ -288,75 +342,79 @@ struct regnode_charclass_class {
#define REG_MAGIC 0234
-#define SIZE_ONLY (RExC_emit == &PL_regdummy)
+#define SIZE_ONLY (RExC_emit == (regnode *) & RExC_emit_dummy)
+#define PASS1 SIZE_ONLY
+#define PASS2 (! SIZE_ONLY)
/* If the bitmap doesn't fully represent what this ANYOF node can match, the
* ARG is set to this special value (since 0, 1, ... are legal, but will never
* reach this high). */
#define ANYOF_NONBITMAP_EMPTY ((U32) -1)
-/* The information used to be stored as as combination of the ANYOF_UTF8 and
- * ANYOF_NONBITMAP_NON_UTF8 bits in the flags field, but was moved out of there
- * to free up a bit for other uses. This tries to hide the change from
- * existing code as much as possible. Now, the data structure that goes in ARG
- * is not allocated unless it is needed, and that is what is used to determine
- * if there is something outside the bitmap. The code now assumes that if
- * that structure exists, that any UTF-8 encoded string should be tried against
- * it, but a non-UTF8-encoded string will be tried only if the
- * ANYOF_NONBITMAP_NON_UTF8 bit is also set. */
-#define ANYOF_NONBITMAP(node) (ARG(node) != ANYOF_NONBITMAP_EMPTY)
-
-/* Flags for node->flags of ANYOF. These are in short supply, but there is one
- * currently available. If more than this are needed, the ANYOF_LOCALE and
- * ANYOF_CLASS bits could be shared, making a space penalty for all locale nodes.
- * Also, the UNICODE_ALL bit could be freed up by resorting to creating a swash
- * containing everything above 255. This introduces a performance penalty.
- * Better would be to split it off into a separate node, which actually would
- * improve performance a bit by allowing regexec.c to test for a UTF-8
- * character being above 255 without having to call a function nor calculate
- * its code point value. However, this solution might need to have a second
- * node type, ANYOF_SYNTHETIC_ABOVE_LATIN1_ALL */
-
-#define ANYOF_LOCALE 0x01 /* /l modifier */
+/* Flags for node->flags of ANYOF. These are in short supply, with none
+ * currently available. The ABOVE_LATIN1_ALL bit could be freed up
+ * by resorting to creating a swash containing everything above 255. This
+ * introduces a performance penalty. An option that wouldn't slow things down
+ * would be to split one of the two LOC flags out into a separate
+ * node, like what was done with ANYOF_NON_UTF8_NON_ASCII_ALL in commit
+ * 34fdef848b1687b91892ba55e9e0c3430e0770f6 (but which was reverted because it
+ * wasn't the best option available at the time), and using a LOC flag is
+ * probably better than that commit anyway. But it could be reinstated if we
+ * need a bit. The LOC flags are only for /l nodes; the reverted commit was
+ * only for /d, so there are no combinatorial issues. The LOC flag to use is
+ * probably the POSIXL one.
+ * Several flags are not used in synthetic start class (SSC) nodes, so could be
+ * shared should new flags be needed for SSCs, like ANYOF_EMPTY_STRING now. */
+
+/* regexec.c is expecting this to be in the low bit */
+#define ANYOF_INVERT 0x01
+
+/* For the SSC node only, which cannot be inverted, so is shared with that bit.
+ * This means "Does this SSC match an empty string?" This is used only during
+ * regex compilation. */
+#define ANYOF_EMPTY_STRING ANYOF_INVERT
+
+/* Are there things that will match only if the target string is encoded in
+ * UTF-8? (This is not set if ANYOF_AOVE_LATIN1_ALL is set) */
+#define ANYOF_UTF8 0x02
/* The fold is calculated and stored in the bitmap where possible at compile
* time. However under locale, the actual folding varies depending on
* what the locale is at the time of execution, so it has to be deferred until
* then */
-#define ANYOF_LOC_FOLD 0x02
+#define ANYOF_LOC_FOLD 0x04
-#define ANYOF_INVERT 0x04
-
-/* Set if this is a struct regnode_charclass_class vs a regnode_charclass. This
+/* Set if this is a regnode_charclass_posixl vs a regnode_charclass. This
* is used for runtime \d, \w, [:posix:], ..., which are used only in locale
* and the optimizer's synthetic start class. Non-locale \d, etc are resolved
- * at compile-time. Could be shared with ANYOF_LOCALE, forcing all locale
- * nodes to be large */
-#define ANYOF_CLASS 0x08
-#define ANYOF_LARGE ANYOF_CLASS /* Same; name retained for back compat */
+ * at compile-time */
+#define ANYOF_POSIXL 0x08
+#define ANYOF_CLASS ANYOF_POSIXL
+#define ANYOF_LARGE ANYOF_POSIXL
-/* Unused: 0x10. When using, be sure to change ANYOF_FLAGS_ALL below */
+/* Should we raise a warning if matching against an above-Unicode code point?
+ * */
+#define ANYOF_WARN_SUPER 0x10
/* Can match something outside the bitmap that isn't in utf8 */
#define ANYOF_NONBITMAP_NON_UTF8 0x20
/* Matches every code point 0x100 and above*/
-#define ANYOF_UNICODE_ALL 0x40
+#define ANYOF_ABOVE_LATIN1_ALL 0x40
+#define ANYOF_UNICODE_ALL ANYOF_ABOVE_LATIN1_ALL
/* Match all Latin1 characters that aren't ASCII when the target string is not
* in utf8. */
-#define ANYOF_NON_UTF8_LATIN1_ALL 0x80
+#define ANYOF_NON_UTF8_NON_ASCII_ALL 0x80
-#define ANYOF_FLAGS_ALL (0xff & ~0x10)
+#define ANYOF_FLAGS_ALL (0xff)
-/* These are the flags that ANYOF_INVERT being set or not doesn't affect
- * whether they are operative or not. e.g., the node still has LOCALE
- * regardless of being inverted; whereas ANYOF_UNICODE_ALL means something
- * different if inverted */
-#define INVERSION_UNAFFECTED_FLAGS (ANYOF_LOCALE \
- |ANYOF_LOC_FOLD \
- |ANYOF_CLASS \
- |ANYOF_NONBITMAP_NON_UTF8)
+#define ANYOF_LOCALE_FLAGS (ANYOF_LOC_FOLD | ANYOF_POSIXL)
+
+/* These are the flags that apply to both regular ANYOF nodes and synthetic
+ * start class nodes during construction of the SSC. During finalization of
+ * the SSC, other of the flags could be added to it */
+#define ANYOF_COMMON_FLAGS (ANYOF_WARN_SUPER|ANYOF_UTF8)
/* Character classes for node->classflags of ANYOF */
/* Should be synchronized with a table in regprop() */
@@ -408,19 +466,21 @@ struct regnode_charclass_class {
# error Problem with handy.h _HIGHEST_REGCOMP_DOT_H_SYNC #define
#endif
-#define ANYOF_MAX (ANYOF_VERTWS) /* So upper loop limit is written:
- * '< ANYOF_MAX'
- * Hence doesn't include VERTWS, as that
- * is a pseudo class */
-#if (ANYOF_MAX > 32) /* Must fit in 32-bit word */
+#define ANYOF_POSIXL_MAX (ANYOF_VERTWS) /* So upper loop limit is written:
+ * '< ANYOF_MAX'
+ * Hence doesn't include VERTWS, as that
+ * is a pseudo class */
+#define ANYOF_MAX ANYOF_POSIXL_MAX
+
+#if (ANYOF_POSIXL_MAX > 32) /* Must fit in 32-bit word */
# error Problem with handy.h _CC_foo #defines
#endif
-#define ANYOF_HORIZWS ((ANYOF_MAX)+2) /* = (ANYOF_NVERTWS + 1) */
-#define ANYOF_NHORIZWS ((ANYOF_MAX)+3)
+#define ANYOF_HORIZWS ((ANYOF_POSIXL_MAX)+2) /* = (ANYOF_NVERTWS + 1) */
+#define ANYOF_NHORIZWS ((ANYOF_POSIXL_MAX)+3)
-#define ANYOF_UNIPROP ((ANYOF_MAX)+4) /* Used to indicate a Unicode
- property: \p{} or \P{} */
+#define ANYOF_UNIPROP ((ANYOF_POSIXL_MAX)+4) /* Used to indicate a Unicode
+ property: \p{} or \P{} */
/* Backward source code compatibility. */
@@ -434,22 +494,51 @@ struct regnode_charclass_class {
/* Utility macros for the bitmap and classes of ANYOF */
#define ANYOF_SIZE (sizeof(struct regnode_charclass))
-#define ANYOF_CLASS_SIZE (sizeof(struct regnode_charclass_class))
+#define ANYOF_POSIXL_SIZE (sizeof(regnode_charclass_posixl))
+#define ANYOF_CLASS_SIZE ANYOF_POSIXL_SIZE
#define ANYOF_FLAGS(p) ((p)->flags)
#define ANYOF_BIT(c) (1 << ((c) & 7))
-#define ANYOF_CLASS_SET(p, c) (((struct regnode_charclass_class*) (p))->classflags |= (1U << (c)))
-#define ANYOF_CLASS_CLEAR(p, c) (((struct regnode_charclass_class*) (p))->classflags &= ~ (1U <<(c)))
-#define ANYOF_CLASS_TEST(p, c) (((struct regnode_charclass_class*) (p))->classflags & (1U << (c)))
+#define ANYOF_POSIXL_SET(p, c) (((regnode_charclass_posixl*) (p))->classflags |= (1U << (c)))
+#define ANYOF_CLASS_SET(p, c) ANYOF_POSIXL_SET((p), (c))
-#define ANYOF_CLASS_ZERO(ret) STMT_START { ((struct regnode_charclass_class*) (ret))->classflags = 0; } STMT_END
+#define ANYOF_POSIXL_CLEAR(p, c) (((regnode_charclass_posixl*) (p))->classflags &= ~ (1U <<(c)))
+#define ANYOF_CLASS_CLEAR(p, c) ANYOF_POSIXL_CLEAR((p), (c))
+
+#define ANYOF_POSIXL_TEST(p, c) (((regnode_charclass_posixl*) (p))->classflags & (1U << (c)))
+#define ANYOF_CLASS_TEST(p, c) ANYOF_POSIXL_TEST((p), (c))
+
+#define ANYOF_POSIXL_ZERO(ret) STMT_START { ((regnode_charclass_posixl*) (ret))->classflags = 0; } STMT_END
+#define ANYOF_CLASS_ZERO(ret) ANYOF_POSIXL_ZERO(ret)
/* Shifts a bit to get, eg. 0x4000_0000, then subtracts 1 to get 0x3FFF_FFFF */
-#define ANYOF_CLASS_SETALL(ret) STMT_START { ((struct regnode_charclass_class*) (ret))->classflags = ((1U << ((ANYOF_MAX) - 1))) - 1; } STMT_END
+#define ANYOF_POSIXL_SETALL(ret) STMT_START { ((regnode_charclass_posixl*) (ret))->classflags = ((1U << ((ANYOF_POSIXL_MAX) - 1))) - 1; } STMT_END
+#define ANYOF_CLASS_SETALL(ret) ANYOF_POSIXL_SETALL(ret)
+
+#define ANYOF_POSIXL_TEST_ANY_SET(p) \
+ ((ANYOF_FLAGS(p) & ANYOF_POSIXL) \
+ && (((regnode_charclass_posixl*)(p))->classflags))
+#define ANYOF_CLASS_TEST_ANY_SET(p) ANYOF_POSIXL_TEST_ANY_SET(p)
-#define ANYOF_CLASS_OR(source, dest) STMT_START { (dest)->classflags |= source->classflags ; } STMT_END
+/* Since an SSC always has this field, we don't have to test for that; nor do
+ * we want to because the bit isn't set for SSC during its construction */
+#define ANYOF_POSIXL_SSC_TEST_ANY_SET(p) \
+ cBOOL(((regnode_ssc*)(p))->classflags)
+#define ANYOF_POSIXL_SSC_TEST_ALL_SET(p) /* Are all bits set? */ \
+ (((regnode_ssc*) (p))->classflags \
+ == ((1U << ((ANYOF_POSIXL_MAX) - 1))) - 1)
+
+#define ANYOF_POSIXL_TEST_ALL_SET(p) \
+ ((ANYOF_FLAGS(p) & ANYOF_POSIXL) \
+ && ((regnode_charclass_posixl*) (p))->classflags \
+ == ((1U << ((ANYOF_POSIXL_MAX) - 1))) - 1)
+
+#define ANYOF_POSIXL_OR(source, dest) STMT_START { (dest)->classflags |= (source)->classflags ; } STMT_END
+#define ANYOF_CLASS_OR(source, dest) ANYOF_POSIXL_OR((source), (dest))
+
+#define ANYOF_POSIXL_AND(source, dest) STMT_START { (dest)->classflags &= (source)->classflags ; } STMT_END
#define ANYOF_BITMAP_ZERO(ret) Zero(((struct regnode_charclass*)(ret))->bitmap, ANYOF_BITMAP_SIZE, char)
#define ANYOF_BITMAP(p) (((struct regnode_charclass*)(p))->bitmap)
@@ -467,14 +556,8 @@ struct regnode_charclass_class {
memEQ (ANYOF_BITMAP(p), "\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377", ANYOF_BITMAP_SIZE)
#define ANYOF_SKIP ((ANYOF_SIZE - 1)/sizeof(regnode))
-#define ANYOF_CLASS_SKIP ((ANYOF_CLASS_SIZE - 1)/sizeof(regnode))
-
-#define ANYOF_CLASS_TEST_ANY_SET(p) \
- ((ANYOF_FLAGS(p) & ANYOF_CLASS) \
- && (((struct regnode_charclass_class*)(p))->classflags))
-/*#define ANYOF_CLASS_ADD_SKIP (ANYOF_CLASS_SKIP - ANYOF_SKIP)
- * */
-
+#define ANYOF_POSIXL_SKIP ((ANYOF_POSIXL_SIZE - 1)/sizeof(regnode))
+#define ANYOF_CLASS_SKIP ANYOF_POSIXL_SKIP
/*
* Utility definitions.
@@ -487,18 +570,20 @@ struct regnode_charclass_class {
#define EXTRA_SIZE(guy) ((sizeof(guy)-1)/sizeof(struct regnode))
-#define REG_SEEN_ZERO_LEN 0x00000001
-#define REG_SEEN_LOOKBEHIND 0x00000002
-#define REG_SEEN_GPOS 0x00000004
+#define REG_ZERO_LEN_SEEN 0x00000001
+#define REG_LOOKBEHIND_SEEN 0x00000002
+#define REG_GPOS_SEEN 0x00000004
/* spare */
-#define REG_SEEN_CANY 0x00000010
-#define REG_SEEN_SANY REG_SEEN_CANY /* src bckwrd cmpt */
-#define REG_SEEN_RECURSE 0x00000020
-#define REG_TOP_LEVEL_BRANCHES 0x00000040
-#define REG_SEEN_VERBARG 0x00000080
-#define REG_SEEN_CUTGROUP 0x00000100
-#define REG_SEEN_RUN_ON_COMMENT 0x00000200
-#define REG_SEEN_EXACTF_SHARP_S 0x00000400
+#define REG_CANY_SEEN 0x00000010
+#define REG_RECURSE_SEEN 0x00000020
+#define REG_TOP_LEVEL_BRANCHES_SEEN 0x00000040
+#define REG_VERBARG_SEEN 0x00000080
+#define REG_CUTGROUP_SEEN 0x00000100
+#define REG_RUN_ON_COMMENT_SEEN 0x00000200
+#define REG_UNFOLDED_MULTI_SEEN 0x00000400
+#define REG_GOSTART_SEEN 0x00000800
+#define REG_UNBOUNDED_QUANTIFIER_SEEN 0x00001000
+
START_EXTERN_C