regex_internal.h

硬盘各项性能的测试,如温度容量版本健康度型号

  ((pstr)->wcs[idx] != WEOF && ((pstr)->len == (idx) \
				|| (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_get_buffer(pstr) ((pstr)->mbs)
#define re_string_length(pstr) ((pstr)->len)
#define re_string_byte_at(pstr,idx) ((pstr)->mbs[idx])
#define re_string_skip_bytes(pstr,idx) ((pstr)->cur_idx += (idx))
#define re_string_set_index(pstr,idx) ((pstr)->cur_idx = (idx))

#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
{
  struct bin_tree_t *parent;
  struct bin_tree_t *left;
  struct bin_tree_t *right;

  /* `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;


#define CONTEXT_WORD 1
#define CONTEXT_NEWLINE (CONTEXT_WORD << 1)
#define CONTEXT_BEGBUF (CONTEXT_NEWLINE << 1)
#define CONTEXT_ENDBUF (CONTEXT_BEGBUF << 1)

#define IS_WORD_CONTEXT(c) ((c) & CONTEXT_WORD)
#define IS_NEWLINE_CONTEXT(c) ((c) & CONTEXT_NEWLINE)
#define IS_BEGBUF_CONTEXT(c) ((c) & CONTEXT_BEGBUF)
#define IS_ENDBUF_CONTEXT(c) ((c) & CONTEXT_ENDBUF)
#define IS_ORDINARY_CONTEXT(c) ((c) == 0)

#define IS_WORD_CHAR(ch) (isalnum (ch) || (ch) == '_')
#define IS_NEWLINE(ch) ((ch) == NEWLINE_CHAR)
#define IS_WIDE_WORD_CHAR(ch) (iswalnum (ch) || (ch) == L'_')
#define IS_WIDE_NEWLINE(ch) ((ch) == WIDE_NEWLINE_CHAR)

#define NOT_SATISFY_PREV_CONSTRAINT(constraint,context) \
 ((((constraint) & PREV_WORD_CONSTRAINT) && !IS_WORD_CONTEXT (context)) \
  || ((constraint & PREV_NOTWORD_CONSTRAINT) && IS_WORD_CONTEXT (context)) \
  || ((constraint & PREV_NEWLINE_CONSTRAINT) && !IS_NEWLINE_CONTEXT (context))\
  || ((constraint & PREV_BEGBUF_CONSTRAINT) && !IS_BEGBUF_CONTEXT (context)))

#define NOT_SATISFY_NEXT_CONSTRAINT(constraint,context) \
 ((((constraint) & NEXT_WORD_CONSTRAINT) && !IS_WORD_CONTEXT (context)) \
  || (((constraint) & NEXT_NOTWORD_CONSTRAINT) && IS_WORD_CONTEXT (context)) \
  || (((constraint) & NEXT_NEWLINE_CONSTRAINT) && !IS_NEWLINE_CONTEXT (context)) \
  || (((constraint) & NEXT_ENDBUF_CONSTRAINT) && !IS_ENDBUF_CONTEXT (context)))

struct re_dfastate_t
{
  unsigned int hash;
  re_node_set nodes;
  re_node_set *entrance_nodes;
  struct re_dfastate_t **trtable;
  struct re_dfastate_t **trtable_search;
  /* 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;
  unsigned int halt : 1;
  /* If this state can accept `multi byte'.
     Note that we refer to multibyte characters, and multi character
     collating elements as `multi byte'.  */
  unsigned int accept_mb : 1;
  /* If this state has backreference node(s).  */
  unsigned int has_backref : 1;
  unsigned int has_constraint : 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 alloc;
  re_dfastate_t **array;
};

/* Array type used in re_sub_match_last_t and re_sub_match_top_t.  */

typedef struct
{
  int next_idx;
  int alloc;
  re_dfastate_t **array;
} state_array_t;

/* Store information about the node NODE whose type is OP_CLOSE_SUBEXP.  */

typedef struct
{
  int node;
  int str_idx; /* The position NODE match at.  */
  state_array_t path;
} re_sub_match_last_t;

/* Store information about the node NODE whose type is OP_OPEN_SUBEXP.
   And information about the node, whose type is OP_CLOSE_SUBEXP,
   corresponding to NODE is stored in LASTS.  */

typedef struct
{
  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.  */
  re_sub_match_last_t **lasts;
} re_sub_match_top_t;

struct re_backref_cache_entry
{
  int node;
  int str_idx;
  int subexp_from;
  int subexp_to;
  int flag;
};

typedef struct
{
  /* 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;
  /* Back reference cache.  */
  int nbkref_ents;
  int abkref_ents;
  struct re_backref_cache_entry *bkref_ents;
  int max_mb_elem_len;
  int nsub_tops;
  int asub_tops;
  re_sub_match_top_t **sub_tops;
} re_match_context_t;

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_sift_context_t;

struct re_fail_stack_ent_t
{
  int idx;
  int node;
  regmatch_t *regs;
  re_node_set eps_via_nodes;
};

struct re_fail_stack_t
{
  int num;
  int alloc;
  struct re_fail_stack_ent_t *stack;
};

struct re_dfa_t
{
  re_bitset_ptr_t word_char;

  /* number of subexpressions `re_nsub' is in regex_t.  */
  int subexps_alloc;
  re_subexp_t *subexps;

  re_token_t *nodes;
  int nodes_alloc;
  int nodes_len;
  bin_tree_t *str_tree;
  int *nexts;
  int *org_indices;
  re_node_set *edests;
  re_node_set *eclosures;
  re_node_set *inveclosures;
  struct re_state_table_entry *state_table;
  unsigned int state_hash_mask;
  re_dfastate_t *init_state;
  re_dfastate_t *init_state_word;
  re_dfastate_t *init_state_nl;
  re_dfastate_t *init_state_begbuf;
  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;
#ifdef DEBUG
  char* re_str;
#endif
  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
     collating element.  */
  unsigned int has_mb_node : 1;
};
typedef struct re_dfa_t re_dfa_t;

static reg_errcode_t re_node_set_alloc (re_node_set *set, int size);
static reg_errcode_t re_node_set_init_1 (re_node_set *set, int elem);
static reg_errcode_t re_node_set_init_2 (re_node_set *set, int elem1,
					 int elem2);
#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);
static reg_errcode_t re_node_set_add_intersect (re_node_set *dest,
						const re_node_set *src1,
						const re_node_set *src2);
static reg_errcode_t re_node_set_init_union (re_node_set *dest,
					     const re_node_set *src1,
					     const re_node_set *src2);
static reg_errcode_t re_node_set_merge (re_node_set *dest,
					const re_node_set *src);
static int re_node_set_insert (re_node_set *set, int elem);
static int re_node_set_compare (const re_node_set *set1,
				const re_node_set *set2);
static int re_node_set_contains (const re_node_set *set, int elem);
static void re_node_set_remove_at (re_node_set *set, int idx);
#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);
static re_dfastate_t *re_acquire_state (reg_errcode_t *err, re_dfa_t *dfa,
					const re_node_set *nodes);
static re_dfastate_t *re_acquire_state_context (reg_errcode_t *err,
						re_dfa_t *dfa,
						const re_node_set *nodes,
						unsigned int context);
static void free_state (re_dfastate_t *state);


typedef enum
{
  SB_CHAR,
  MB_CHAR,
  EQUIV_CLASS,
  COLL_SYM,
  CHAR_CLASS
} bracket_elem_type;

typedef struct
{
  bracket_elem_type type;
  union
  {
    unsigned char ch;
    unsigned char *name;
    wchar_t wch;
  } opr;
} bracket_elem_t;


/* Inline functions for bitset operation.  */
static inline void
bitset_not (set)
     bitset set;
{
  int bitset_i;
  for (bitset_i = 0; bitset_i < BITSET_UINTS; ++bitset_i)
    set[bitset_i] = ~set[bitset_i];
}

static inline void
bitset_merge (dest, src)
     bitset dest;
     const bitset src;
{
  int bitset_i;
  for (bitset_i = 0; bitset_i < BITSET_UINTS; ++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];
}

#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;
{
  int byte_idx;
  if (MB_CUR_MAX == 1)
    return 1;
  for (byte_idx = 1; idx + byte_idx < pstr->len; ++byte_idx)
    if (pstr->wcs[idx + byte_idx] != WEOF)
      break;
  return byte_idx;
}

static inline wint_t
re_string_wchar_at (pstr, idx)
     const re_string_t *pstr;
     int idx;
{
  if (MB_CUR_MAX == 1)
    return (wint_t) pstr->mbs[idx];
  return (wint_t) pstr->wcs[idx];
}

static int
re_string_elem_size_at (pstr, idx)
     const re_string_t *pstr;
     int idx;
{
#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)
    {
      table = (const int32_t *) _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB);
      extra = (const unsigned char *)
	_NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB);
      indirect = (const int32_t *) _NL_CURRENT (LC_COLLATE,
						_NL_COLLATE_INDIRECTMB);
      p = pstr->mbs + idx;
      tmp = findidx (&p);
      return p - pstr->mbs - idx;
    }
  else
#endif /* _LIBC */
    return 1;
}
#endif /* RE_ENABLE_I18N */

#endif /*  _REGEX_INTERNAL_H */