/* Extended regular expression matching and search library.
- Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2002-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#ifndef _REGEX_INTERNAL_H
#define _REGEX_INTERNAL_H 1
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
#include <assert.h>
#include <ctype.h>
-#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#if defined HAVE_LANGINFO_H || defined HAVE_LANGINFO_CODESET || defined _LIBC
+# include <langinfo.h>
+#endif
#if defined HAVE_LOCALE_H || defined _LIBC
# include <locale.h>
#endif
#if defined HAVE_WCTYPE_H || defined _LIBC
# include <wctype.h>
#endif /* HAVE_WCTYPE_H || _LIBC */
+#if defined HAVE_STDBOOL_H || defined _LIBC
+# include <stdbool.h>
+#endif /* HAVE_STDBOOL_H || _LIBC */
+#if defined HAVE_STDINT_H || defined _LIBC
+# include <stdint.h>
+#endif /* HAVE_STDINT_H || _LIBC */
+#if defined _LIBC
+# include <bits/libc-lock.h>
+#else
+# define __libc_lock_define(CLASS,NAME)
+# define __libc_lock_init(NAME) do { } while (0)
+# define __libc_lock_lock(NAME) do { } while (0)
+# define __libc_lock_unlock(NAME) do { } while (0)
+#endif
/* In case that the system doesn't have isblank(). */
#if !defined _LIBC && !defined HAVE_ISBLANK && !defined isblank
# ifndef _RE_DEFINE_LOCALE_FUNCTIONS
# define _RE_DEFINE_LOCALE_FUNCTIONS 1
# include <locale/localeinfo.h>
-# include <locale/elem-hash.h>
# include <locale/coll-lookup.h>
# endif
#endif
/* This is for other GNU distributions with internationalized messages. */
-#if HAVE_LIBINTL_H || defined _LIBC
+#if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
# include <libintl.h>
# ifdef _LIBC
# undef gettext
# define gettext(msgid) \
- INTUSE(__dcgettext) (INTUSE(_libc_intl_domainname), msgid, LC_MESSAGES)
+ __dcgettext (_libc_intl_domainname, msgid, LC_MESSAGES)
# endif
#else
# define gettext(msgid) (msgid)
# define gettext_noop(String) String
#endif
-#if (defined MB_CUR_MAX && HAVE_LOCALE_H && HAVE_WCTYPE_H && HAVE_WCHAR_H && HAVE_WCRTOMB && HAVE_MBRTOWC && HAVE_WCSCOLL) || _LIBC
+/* For loser systems without the definition. */
+#ifndef SIZE_MAX
+# define SIZE_MAX ((size_t) -1)
+#endif
+
+#if (defined MB_CUR_MAX && HAVE_WCTYPE_H && HAVE_ISWCTYPE) || _LIBC
# define RE_ENABLE_I18N
#endif
# define BE(expr, val) __builtin_expect (expr, val)
#else
# define BE(expr, val) (expr)
-# define inline
#endif
-/* Number of bits in a byte. */
-#define BYTE_BITS 8
/* Number of single byte character. */
#define SBC_MAX 256
# define __wctype wctype
# define __iswctype iswctype
# define __btowc btowc
+# define __mbrtowc mbrtowc
# define __mempcpy mempcpy
# define __wcrtomb wcrtomb
+# define __regfree regfree
# define attribute_hidden
#endif /* not _LIBC */
-#ifdef __GNUC__
-# define __attribute(arg) __attribute__ (arg)
-#else
-# define __attribute(arg)
+#if __GNUC__ < 3 + (__GNUC_MINOR__ < 1)
+# define __attribute__(arg)
#endif
extern const char __re_error_msgid[] attribute_hidden;
extern const size_t __re_error_msgid_idx[] attribute_hidden;
-/* Number of bits in an unsinged int. */
-#define UINT_BITS (sizeof (unsigned int) * BYTE_BITS)
-/* Number of unsigned int in an bit_set. */
-#define BITSET_UINTS ((SBC_MAX + UINT_BITS - 1) / UINT_BITS)
-typedef unsigned int bitset[BITSET_UINTS];
-typedef unsigned int *re_bitset_ptr_t;
-
-#define bitset_set(set,i) (set[i / UINT_BITS] |= 1 << i % UINT_BITS)
-#define bitset_clear(set,i) (set[i / UINT_BITS] &= ~(1 << i % UINT_BITS))
-#define bitset_contain(set,i) (set[i / UINT_BITS] & (1 << i % UINT_BITS))
-#define bitset_empty(set) memset (set, 0, sizeof (unsigned int) * BITSET_UINTS)
-#define bitset_set_all(set) \
- memset (set, 255, sizeof (unsigned int) * BITSET_UINTS)
-#define bitset_copy(dest,src) \
- memcpy (dest, src, sizeof (unsigned int) * BITSET_UINTS)
-static inline void bitset_not (bitset set);
-static inline void bitset_merge (bitset dest, const bitset src);
-static inline void bitset_not_merge (bitset dest, const bitset src);
-static inline void bitset_mask (bitset dest, const bitset src);
+/* An integer used to represent a set of bits. It must be unsigned,
+ and must be at least as wide as unsigned int. */
+typedef unsigned long int bitset_word_t;
+/* All bits set in a bitset_word_t. */
+#define BITSET_WORD_MAX ULONG_MAX
+/* Number of bits in a bitset_word_t. */
+#define BITSET_WORD_BITS (sizeof (bitset_word_t) * CHAR_BIT)
+/* Number of bitset_word_t in a bit_set. */
+#define BITSET_WORDS (SBC_MAX / BITSET_WORD_BITS)
+typedef bitset_word_t bitset_t[BITSET_WORDS];
+typedef bitset_word_t *re_bitset_ptr_t;
+typedef const bitset_word_t *re_const_bitset_ptr_t;
+
+#define bitset_set(set,i) \
+ (set[i / BITSET_WORD_BITS] |= (bitset_word_t) 1 << i % BITSET_WORD_BITS)
+#define bitset_clear(set,i) \
+ (set[i / BITSET_WORD_BITS] &= ~((bitset_word_t) 1 << i % BITSET_WORD_BITS))
+#define bitset_contain(set,i) \
+ (set[i / BITSET_WORD_BITS] & ((bitset_word_t) 1 << i % BITSET_WORD_BITS))
+#define bitset_empty(set) memset (set, '\0', sizeof (bitset_t))
+#define bitset_set_all(set) memset (set, '\xff', sizeof (bitset_t))
+#define bitset_copy(dest,src) memcpy (dest, src, sizeof (bitset_t))
#define PREV_WORD_CONSTRAINT 0x0001
#define PREV_NOTWORD_CONSTRAINT 0x0002
#define NEXT_NEWLINE_CONSTRAINT 0x0020
#define PREV_BEGBUF_CONSTRAINT 0x0040
#define NEXT_ENDBUF_CONSTRAINT 0x0080
-#define DUMMY_CONSTRAINT 0x0100
+#define WORD_DELIM_CONSTRAINT 0x0100
+#define NOT_WORD_DELIM_CONSTRAINT 0x0200
typedef enum
{
INSIDE_WORD = PREV_WORD_CONSTRAINT | NEXT_WORD_CONSTRAINT,
WORD_FIRST = PREV_NOTWORD_CONSTRAINT | NEXT_WORD_CONSTRAINT,
WORD_LAST = PREV_WORD_CONSTRAINT | NEXT_NOTWORD_CONSTRAINT,
+ INSIDE_NOTWORD = PREV_NOTWORD_CONSTRAINT | NEXT_NOTWORD_CONSTRAINT,
LINE_FIRST = PREV_NEWLINE_CONSTRAINT,
LINE_LAST = NEXT_NEWLINE_CONSTRAINT,
BUF_FIRST = PREV_BEGBUF_CONSTRAINT,
BUF_LAST = NEXT_ENDBUF_CONSTRAINT,
- WORD_DELIM = DUMMY_CONSTRAINT
+ WORD_DELIM = WORD_DELIM_CONSTRAINT,
+ NOT_WORD_DELIM = NOT_WORD_DELIM_CONSTRAINT
} re_context_type;
typedef struct
OP_CLOSE_SUBEXP = EPSILON_BIT | 1,
OP_ALT = EPSILON_BIT | 2,
OP_DUP_ASTERISK = EPSILON_BIT | 3,
- OP_DUP_PLUS = EPSILON_BIT | 4,
- OP_DUP_QUESTION = EPSILON_BIT | 5,
- ANCHOR = EPSILON_BIT | 6,
+ ANCHOR = EPSILON_BIT | 4,
/* Tree type, these are used only by tree. */
CONCAT = 16,
+ SUBEXP = 17,
/* Token type, these are used only by token. */
- OP_OPEN_BRACKET = 17,
+ OP_DUP_PLUS = 18,
+ OP_DUP_QUESTION,
+ OP_OPEN_BRACKET,
OP_CLOSE_BRACKET,
OP_CHARSET_RANGE,
OP_OPEN_DUP_NUM,
unsigned int duplicated : 1;
unsigned int opt_subexp : 1;
#ifdef RE_ENABLE_I18N
+ unsigned int accept_mb : 1;
/* These 2 bits can be moved into the union if needed (e.g. if running out
of bits; move opr.c to opr.c.c and move the flags to opr.c.flags). */
unsigned int mb_partial : 1;
} re_token_t;
#define IS_EPSILON_NODE(type) ((type) & EPSILON_BIT)
-#define ACCEPT_MB_NODE(type) \
- ((type) >= OP_PERIOD && (type) <= OP_UTF8_PERIOD)
struct re_string_t
{
unsigned int tip_context;
/* The translation passed as a part of an argument of re_compile_pattern. */
RE_TRANSLATE_TYPE trans;
+ /* Copy of re_dfa_t's word_char. */
+ re_const_bitset_ptr_t word_char;
/* 1 if REG_ICASE. */
unsigned char icase;
unsigned char is_utf8;
unsigned char map_notascii;
unsigned char mbs_allocated;
unsigned char offsets_needed;
+ unsigned char newline_anchor;
+ unsigned char word_ops_used;
int mb_cur_max;
};
typedef struct re_string_t re_string_t;
#ifndef _LIBC
# ifdef __i386__
-# define internal_function __attribute ((regparm (3), stdcall))
+# define internal_function __attribute__ ((regparm (3), stdcall))
# else
# define internal_function
# endif
#endif
-#ifndef RE_NO_INTERNAL_PROTOTYPES
-static reg_errcode_t re_string_allocate (re_string_t *pstr, const char *str,
- int len, int init_len,
- RE_TRANSLATE_TYPE trans, int icase,
- const re_dfa_t *dfa) internal_function;
-static reg_errcode_t re_string_construct (re_string_t *pstr, const char *str,
- int len, RE_TRANSLATE_TYPE trans,
- int icase, const re_dfa_t *dfa) internal_function;
-static reg_errcode_t re_string_reconstruct (re_string_t *pstr, int idx,
- int eflags, int newline) internal_function;
+#if IS_IN (libc)
static reg_errcode_t re_string_realloc_buffers (re_string_t *pstr,
- int new_buf_len) internal_function;
+ int new_buf_len)
+ internal_function;
# ifdef RE_ENABLE_I18N
static void build_wcs_buffer (re_string_t *pstr) internal_function;
-static int build_wcs_upper_buffer (re_string_t *pstr) internal_function;
+static reg_errcode_t build_wcs_upper_buffer (re_string_t *pstr)
+ internal_function;
# endif /* RE_ENABLE_I18N */
static void build_upper_buffer (re_string_t *pstr) internal_function;
static void re_string_translate_buffer (re_string_t *pstr) internal_function;
-static void re_string_destruct (re_string_t *pstr) internal_function;
-# ifdef RE_ENABLE_I18N
-static int re_string_elem_size_at (const re_string_t *pstr, int idx) internal_function;
-static inline int re_string_char_size_at (const re_string_t *pstr, int idx) internal_function;
-static inline wint_t re_string_wchar_at (const re_string_t *pstr, int idx) internal_function;
-# endif /* RE_ENABLE_I18N */
static unsigned int re_string_context_at (const re_string_t *input, int idx,
- int eflags, int newline_anchor) internal_function;
-static unsigned char re_string_peek_byte_case (const re_string_t *pstr,
- int idx) internal_function;
-static unsigned char re_string_fetch_byte_case (re_string_t *pstr) internal_function;
+ int eflags)
+ internal_function __attribute__ ((pure));
#endif
#define re_string_peek_byte(pstr, offset) \
((pstr)->mbs[(pstr)->cur_idx + offset])
#define re_string_first_byte(pstr, idx) \
((idx) == (pstr)->valid_len || (pstr)->wcs[idx] != WEOF)
#define re_string_is_single_byte_char(pstr, idx) \
- ((pstr)->wcs[idx] != WEOF && ((pstr)->valid_len == (idx) \
+ ((pstr)->wcs[idx] != WEOF && ((pstr)->valid_len == (idx) + 1 \
|| (pstr)->wcs[(idx) + 1] != WEOF))
#define re_string_eoi(pstr) ((pstr)->stop <= (pstr)->cur_idx)
#define re_string_cur_idx(pstr) ((pstr)->cur_idx)
#define re_string_skip_bytes(pstr,idx) ((pstr)->cur_idx += (idx))
#define re_string_set_index(pstr,idx) ((pstr)->cur_idx = (idx))
+#include <alloca.h>
+
+#ifndef _LIBC
+# if HAVE_ALLOCA
+/* The OS usually guarantees only one guard page at the bottom of the stack,
+ and a page size can be as small as 4096 bytes. So we cannot safely
+ allocate anything larger than 4096 bytes. Also care for the possibility
+ of a few compiler-allocated temporary stack slots. */
+# define __libc_use_alloca(n) ((n) < 4032)
+# else
+/* alloca is implemented with malloc, so just use malloc. */
+# define __libc_use_alloca(n) 0
+# endif
+#endif
+
#define re_malloc(t,n) ((t *) malloc ((n) * sizeof (t)))
#define re_realloc(p,t,n) ((t *) realloc (p, (n) * sizeof (t)))
#define re_free(p) free (p)
struct bin_tree_t *parent;
struct bin_tree_t *left;
struct bin_tree_t *right;
+ struct bin_tree_t *first;
+ struct bin_tree_t *next;
+
+ re_token_t token;
/* `node_idx' is the index in dfa->nodes, if `type' == 0.
Otherwise `type' indicate the type of this node. */
- re_token_type_t type;
int node_idx;
-
- int first;
- int next;
- re_node_set eclosure;
};
typedef struct bin_tree_t bin_tree_t;
{
unsigned int hash;
re_node_set nodes;
+ re_node_set non_eps_nodes;
+ re_node_set inveclosure;
re_node_set *entrance_nodes;
- struct re_dfastate_t **trtable;
- /* If this state is a special state.
- A state is a special state if the state is the halt state, or
- a anchor. */
- unsigned int context : 2;
+ struct re_dfastate_t **trtable, **word_trtable;
+ unsigned int context : 4;
unsigned int halt : 1;
/* If this state can accept `multi byte'.
Note that we refer to multibyte characters, and multi character
/* If this state has backreference node(s). */
unsigned int has_backref : 1;
unsigned int has_constraint : 1;
- unsigned int word_trtable : 1;
};
typedef struct re_dfastate_t re_dfastate_t;
-typedef struct
-{
- /* start <= node < end */
- int start;
- int end;
-} re_subexp_t;
-
struct re_state_table_entry
{
int num;
{
int str_idx;
int node;
- int next_last_offset;
state_array_t *path;
int alasts; /* Allocation size of LASTS. */
int nlasts; /* The number of LASTS. */
int str_idx;
int subexp_from;
int subexp_to;
- int flag;
+ char more;
+ char unused;
+ unsigned short int eps_reachable_subexps_map;
};
typedef struct
{
+ /* The string object corresponding to the input string. */
+ re_string_t input;
+#if defined _LIBC || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
+ const re_dfa_t *const dfa;
+#else
+ const re_dfa_t *dfa;
+#endif
/* EFLAGS of the argument of regexec. */
int eflags;
/* Where the matching ends. */
int match_last;
int last_node;
- /* The string object corresponding to the input string. */
- re_string_t *input;
/* The state log used by the matcher. */
re_dfastate_t **state_log;
int state_log_top;
typedef struct
{
- int cur_bkref;
- int cls_subexp_idx;
-
re_dfastate_t **sifted_states;
re_dfastate_t **limited_states;
-
- re_node_set limits;
-
int last_node;
int last_str_idx;
- int check_subexp;
+ re_node_set limits;
} re_sift_context_t;
struct re_fail_stack_ent_t
struct re_dfa_t
{
- re_bitset_ptr_t word_char;
- re_subexp_t *subexps;
re_token_t *nodes;
- int nodes_alloc;
- int nodes_len;
+ size_t nodes_alloc;
+ size_t nodes_len;
int *nexts;
int *org_indices;
re_node_set *edests;
int str_tree_storage_idx;
/* number of subexpressions `re_nsub' is in regex_t. */
- int subexps_alloc;
unsigned int state_hash_mask;
- int states_alloc;
int init_node;
int nbackref; /* The number of backreference in this dfa. */
+
/* Bitmap expressing which backreference is used. */
- unsigned int used_bkref_map;
+ bitset_word_t used_bkref_map;
+ bitset_word_t completed_bkref_map;
+
unsigned int has_plural_match : 1;
/* If this dfa has "multibyte node", which is a backreference or
a node which can accept multibyte character or multi character
unsigned int has_mb_node : 1;
unsigned int is_utf8 : 1;
unsigned int map_notascii : 1;
+ unsigned int word_ops_used : 1;
int mb_cur_max;
+ bitset_t word_char;
+ reg_syntax_t syntax;
+ int *subexp_map;
#ifdef DEBUG
char* re_str;
#endif
+ __libc_lock_define (, lock)
};
-#ifndef RE_NO_INTERNAL_PROTOTYPES
-static reg_errcode_t re_node_set_alloc (re_node_set *set, int size) internal_function;
-static reg_errcode_t re_node_set_init_1 (re_node_set *set, int elem) internal_function;
-static reg_errcode_t re_node_set_init_2 (re_node_set *set, int elem1,
- int elem2) internal_function;
#define re_node_set_init_empty(set) memset (set, '\0', sizeof (re_node_set))
-static reg_errcode_t re_node_set_init_copy (re_node_set *dest,
- const re_node_set *src) internal_function;
-static reg_errcode_t re_node_set_add_intersect (re_node_set *dest,
- const re_node_set *src1,
- const re_node_set *src2) internal_function;
-static reg_errcode_t re_node_set_init_union (re_node_set *dest,
- const re_node_set *src1,
- const re_node_set *src2) internal_function;
-static reg_errcode_t re_node_set_merge (re_node_set *dest,
- const re_node_set *src) internal_function;
-static int re_node_set_insert (re_node_set *set, int elem) internal_function;
-static int re_node_set_compare (const re_node_set *set1,
- const re_node_set *set2) internal_function;
-static int re_node_set_contains (const re_node_set *set, int elem) internal_function;
-static void re_node_set_remove_at (re_node_set *set, int idx) internal_function;
#define re_node_set_remove(set,id) \
(re_node_set_remove_at (set, re_node_set_contains (set, id) - 1))
#define re_node_set_empty(p) ((p)->nelem = 0)
#define re_node_set_free(set) re_free ((set)->elems)
-static int re_dfa_add_node (re_dfa_t *dfa, re_token_t token, int mode) internal_function;
-static re_dfastate_t *re_acquire_state (reg_errcode_t *err, re_dfa_t *dfa,
- const re_node_set *nodes) internal_function;
-static re_dfastate_t *re_acquire_state_context (reg_errcode_t *err,
- re_dfa_t *dfa,
- const re_node_set *nodes,
- unsigned int context) internal_function;
-static void free_state (re_dfastate_t *state) internal_function;
-#endif
\f
typedef enum
/* Inline functions for bitset operation. */
-static inline void
-bitset_not (set)
- bitset set;
+static void __attribute__ ((unused))
+bitset_not (bitset_t set)
{
int bitset_i;
- for (bitset_i = 0; bitset_i < BITSET_UINTS; ++bitset_i)
+ for (bitset_i = 0; bitset_i < BITSET_WORDS; ++bitset_i)
set[bitset_i] = ~set[bitset_i];
}
-static inline void
-bitset_merge (dest, src)
- bitset dest;
- const bitset src;
+static void __attribute__ ((unused))
+bitset_merge (bitset_t dest, const bitset_t src)
{
int bitset_i;
- for (bitset_i = 0; bitset_i < BITSET_UINTS; ++bitset_i)
+ for (bitset_i = 0; bitset_i < BITSET_WORDS; ++bitset_i)
dest[bitset_i] |= src[bitset_i];
}
-static inline void
-bitset_not_merge (dest, src)
- bitset dest;
- const bitset src;
-{
- int i;
- for (i = 0; i < BITSET_UINTS; ++i)
- dest[i] |= ~src[i];
-}
-
-static inline void
-bitset_mask (dest, src)
- bitset dest;
- const bitset src;
+static void __attribute__ ((unused))
+bitset_mask (bitset_t dest, const bitset_t src)
{
int bitset_i;
- for (bitset_i = 0; bitset_i < BITSET_UINTS; ++bitset_i)
+ for (bitset_i = 0; bitset_i < BITSET_WORDS; ++bitset_i)
dest[bitset_i] &= src[bitset_i];
}
-#if defined RE_ENABLE_I18N && !defined RE_NO_INTERNAL_PROTOTYPES
+#ifdef RE_ENABLE_I18N
/* Inline functions for re_string. */
-static inline int
-re_string_char_size_at (pstr, idx)
- const re_string_t *pstr;
- int idx;
+static int
+internal_function __attribute__ ((pure, unused))
+re_string_char_size_at (const re_string_t *pstr, int idx)
{
int byte_idx;
if (pstr->mb_cur_max == 1)
return byte_idx;
}
-static inline wint_t
-re_string_wchar_at (pstr, idx)
- const re_string_t *pstr;
- int idx;
+static wint_t
+internal_function __attribute__ ((pure, unused))
+re_string_wchar_at (const re_string_t *pstr, int idx)
{
if (pstr->mb_cur_max == 1)
return (wint_t) pstr->mbs[idx];
return (wint_t) pstr->wcs[idx];
}
+# if IS_IN (libc)
+# ifdef _LIBC
+# include <locale/weight.h>
+# endif
+
static int
-re_string_elem_size_at (pstr, idx)
- const re_string_t *pstr;
- int idx;
+internal_function __attribute__ ((pure, unused))
+re_string_elem_size_at (const re_string_t *pstr, int idx)
{
-#ifdef _LIBC
+# ifdef _LIBC
const unsigned char *p, *extra;
const int32_t *table, *indirect;
- int32_t tmp;
-# include <locale/weight.h>
uint_fast32_t nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
if (nrules != 0)
indirect = (const int32_t *) _NL_CURRENT (LC_COLLATE,
_NL_COLLATE_INDIRECTMB);
p = pstr->mbs + idx;
- tmp = findidx (&p);
+ findidx (table, indirect, extra, &p, pstr->len - idx);
return p - pstr->mbs - idx;
}
else
-#endif /* _LIBC */
+# endif /* _LIBC */
return 1;
}
+# endif
#endif /* RE_ENABLE_I18N */
#endif /* _REGEX_INTERNAL_H */
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