/* Extended regular expression matching and search library. Copyright (C) 2002-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Isamu Hasegawa . The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 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, see . */ #ifndef _REGEX_INTERNAL_H #define _REGEX_INTERNAL_H 1 #include #include #include #include #include #include #include #include #include #include #include /* Properties of integers. Although Gnulib has intprops.h, glibc does without for now. */ #ifndef _LIBC # include "intprops.h" #else /* True if the real type T is signed. */ # define TYPE_SIGNED(t) (! ((t) 0 < (t) -1)) /* True if adding the nonnegative Idx values A and B would overflow. If false, set *R to A + B. A, B, and R may be evaluated more than once, or zero times. Although this is not a full implementation of Gnulib INT_ADD_WRAPV, it is good enough for glibc regex code. FIXME: This implementation is a fragile stopgap, and this file would be simpler and more robust if intprops.h were migrated into glibc. */ # define INT_ADD_WRAPV(a, b, r) \ (IDX_MAX - (a) < (b) ? true : (*(r) = (a) + (b), false)) #endif #ifdef _LIBC # include # define lock_define(name) __libc_lock_define (, name) # define lock_init(lock) (__libc_lock_init (lock), 0) # define lock_fini(lock) ((void) 0) # define lock_lock(lock) __libc_lock_lock (lock) # define lock_unlock(lock) __libc_lock_unlock (lock) #elif defined GNULIB_LOCK && !defined USE_UNLOCKED_IO # include "glthread/lock.h" /* Use gl_lock_define if empty macro arguments are known to work. Otherwise, fall back on less-portable substitutes. */ # if ((defined __GNUC__ && !defined __STRICT_ANSI__) \ || (defined __STDC_VERSION__ && 199901L <= __STDC_VERSION__)) # define lock_define(name) gl_lock_define (, name) # elif USE_POSIX_THREADS # define lock_define(name) pthread_mutex_t name; # elif USE_PTH_THREADS # define lock_define(name) pth_mutex_t name; # elif USE_SOLARIS_THREADS # define lock_define(name) mutex_t name; # elif USE_WINDOWS_THREADS # define lock_define(name) gl_lock_t name; # else # define lock_define(name) # endif # define lock_init(lock) glthread_lock_init (&(lock)) # define lock_fini(lock) glthread_lock_destroy (&(lock)) # define lock_lock(lock) glthread_lock_lock (&(lock)) # define lock_unlock(lock) glthread_lock_unlock (&(lock)) #elif defined GNULIB_PTHREAD && !defined USE_UNLOCKED_IO # include # define lock_define(name) pthread_mutex_t name; # define lock_init(lock) pthread_mutex_init (&(lock), 0) # define lock_fini(lock) pthread_mutex_destroy (&(lock)) # define lock_lock(lock) pthread_mutex_lock (&(lock)) # define lock_unlock(lock) pthread_mutex_unlock (&(lock)) #else # define lock_define(name) # define lock_init(lock) 0 # define lock_fini(lock) ((void) 0) /* The 'dfa' avoids an "unused variable 'dfa'" warning from GCC. */ # define lock_lock(lock) ((void) dfa) # define lock_unlock(lock) ((void) 0) #endif /* In case that the system doesn't have isblank(). */ #if !defined _LIBC && ! (defined isblank || (HAVE_ISBLANK && HAVE_DECL_ISBLANK)) # define isblank(ch) ((ch) == ' ' || (ch) == '\t') #endif #ifdef _LIBC # ifndef _RE_DEFINE_LOCALE_FUNCTIONS # define _RE_DEFINE_LOCALE_FUNCTIONS 1 # include # include # endif #endif /* This is for other GNU distributions with internationalized messages. */ #if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC # include # ifdef _LIBC # undef gettext # define gettext(msgid) \ __dcgettext (_libc_intl_domainname, msgid, LC_MESSAGES) # endif #else # undef gettext # define gettext(msgid) (msgid) #endif #ifndef gettext_noop /* This define is so xgettext can find the internationalizable strings. */ # define gettext_noop(String) String #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) /* Number of ASCII characters. */ #define ASCII_CHARS 0x80 /* Number of single byte characters. */ #define SBC_MAX (UCHAR_MAX + 1) #define COLL_ELEM_LEN_MAX 8 /* The character which represents newline. */ #define NEWLINE_CHAR '\n' #define WIDE_NEWLINE_CHAR L'\n' /* Rename to standard API for using out of glibc. */ #ifndef _LIBC # undef __wctype # undef __iswctype # define __wctype wctype # define __iswalnum iswalnum # define __iswctype iswctype # define __towlower towlower # define __towupper towupper # define __btowc btowc # define __mbrtowc mbrtowc # define __wcrtomb wcrtomb # define __regfree regfree # define attribute_hidden #endif /* not _LIBC */ #if __GNUC__ < 3 + (__GNUC_MINOR__ < 1) # define __attribute__(arg) #endif #ifndef SSIZE_MAX # define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2)) #endif /* The type of indexes into strings. This is signed, not size_t, since the API requires indexes to fit in regoff_t anyway, and using signed integers makes the code a bit smaller and presumably faster. The traditional GNU regex implementation uses int for indexes. The POSIX-compatible implementation uses a possibly-wider type. The name 'Idx' is three letters to minimize the hassle of reindenting a lot of regex code that formerly used 'int'. */ typedef regoff_t Idx; #ifdef _REGEX_LARGE_OFFSETS # define IDX_MAX SSIZE_MAX #else # define IDX_MAX INT_MAX #endif /* A hash value, suitable for computing hash tables. */ typedef __re_size_t re_hashval_t; /* 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. For portability to hosts with padding bits, do not use '(sizeof (bitset_word_t) * CHAR_BIT)'; instead, deduce it directly from BITSET_WORD_MAX. Avoid greater-than-32-bit integers and unconditional shifts by more than 31 bits, as they're not portable. */ #if BITSET_WORD_MAX == 0xffffffffUL # define BITSET_WORD_BITS 32 #elif BITSET_WORD_MAX >> 31 >> 4 == 1 # define BITSET_WORD_BITS 36 #elif BITSET_WORD_MAX >> 31 >> 16 == 1 # define BITSET_WORD_BITS 48 #elif BITSET_WORD_MAX >> 31 >> 28 == 1 # define BITSET_WORD_BITS 60 #elif BITSET_WORD_MAX >> 31 >> 31 >> 1 == 1 # define BITSET_WORD_BITS 64 #elif BITSET_WORD_MAX >> 31 >> 31 >> 9 == 1 # define BITSET_WORD_BITS 72 #elif BITSET_WORD_MAX >> 31 >> 31 >> 31 >> 31 >> 3 == 1 # define BITSET_WORD_BITS 128 #elif BITSET_WORD_MAX >> 31 >> 31 >> 31 >> 31 >> 31 >> 31 >> 31 >> 31 >> 7 == 1 # define BITSET_WORD_BITS 256 #elif BITSET_WORD_MAX >> 31 >> 31 >> 31 >> 31 >> 31 >> 31 >> 31 >> 31 >> 7 > 1 # define BITSET_WORD_BITS 257 /* any value > SBC_MAX will do here */ # if BITSET_WORD_BITS <= SBC_MAX # error "Invalid SBC_MAX" # endif #else # error "Add case for new bitset_word_t size" #endif /* Number of bitset_word_t values in a bitset_t. */ #define BITSET_WORDS ((SBC_MAX + BITSET_WORD_BITS - 1) / 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 PREV_WORD_CONSTRAINT 0x0001 #define PREV_NOTWORD_CONSTRAINT 0x0002 #define NEXT_WORD_CONSTRAINT 0x0004 #define NEXT_NOTWORD_CONSTRAINT 0x0008 #define PREV_NEWLINE_CONSTRAINT 0x0010 #define NEXT_NEWLINE_CONSTRAINT 0x0020 #define PREV_BEGBUF_CONSTRAINT 0x0040 #define NEXT_ENDBUF_CONSTRAINT 0x0080 #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 = WORD_DELIM_CONSTRAINT, NOT_WORD_DELIM = NOT_WORD_DELIM_CONSTRAINT } re_context_type; typedef struct { Idx alloc; Idx nelem; Idx *elems; } re_node_set; typedef enum { NON_TYPE = 0, /* Node type, These are used by token, node, tree. */ CHARACTER = 1, END_OF_RE = 2, SIMPLE_BRACKET = 3, OP_BACK_REF = 4, OP_PERIOD = 5, #ifdef RE_ENABLE_I18N COMPLEX_BRACKET = 6, OP_UTF8_PERIOD = 7, #endif /* RE_ENABLE_I18N */ /* We define EPSILON_BIT as a macro so that OP_OPEN_SUBEXP is used when the debugger shows values of this enum type. */ #define EPSILON_BIT 8 OP_OPEN_SUBEXP = EPSILON_BIT | 0, OP_CLOSE_SUBEXP = EPSILON_BIT | 1, OP_ALT = EPSILON_BIT | 2, OP_DUP_ASTERISK = EPSILON_BIT | 3, 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_DUP_PLUS = 18, OP_DUP_QUESTION, OP_OPEN_BRACKET, OP_CLOSE_BRACKET, OP_CHARSET_RANGE, OP_OPEN_DUP_NUM, OP_CLOSE_DUP_NUM, OP_NON_MATCH_LIST, OP_OPEN_COLL_ELEM, OP_CLOSE_COLL_ELEM, OP_OPEN_EQUIV_CLASS, OP_CLOSE_EQUIV_CLASS, OP_OPEN_CHAR_CLASS, OP_CLOSE_CHAR_CLASS, OP_WORD, OP_NOTWORD, OP_SPACE, OP_NOTSPACE, BACK_SLASH } re_token_type_t; #ifdef RE_ENABLE_I18N typedef struct { /* Multibyte characters. */ wchar_t *mbchars; /* Collating symbols. */ # ifdef _LIBC int32_t *coll_syms; # endif /* Equivalence classes. */ # ifdef _LIBC int32_t *equiv_classes; # endif /* Range expressions. */ # ifdef _LIBC uint32_t *range_starts; uint32_t *range_ends; # else /* not _LIBC */ wchar_t *range_starts; wchar_t *range_ends; # endif /* not _LIBC */ /* Character classes. */ wctype_t *char_classes; /* If this character set is the non-matching list. */ unsigned int non_match : 1; /* # of multibyte characters. */ Idx nmbchars; /* # of collating symbols. */ Idx ncoll_syms; /* # of equivalence classes. */ Idx nequiv_classes; /* # of range expressions. */ Idx nranges; /* # of character classes. */ Idx nchar_classes; } re_charset_t; #endif /* RE_ENABLE_I18N */ typedef struct { union { unsigned char c; /* for CHARACTER */ re_bitset_ptr_t sbcset; /* for SIMPLE_BRACKET */ #ifdef RE_ENABLE_I18N re_charset_t *mbcset; /* for COMPLEX_BRACKET */ #endif /* RE_ENABLE_I18N */ Idx idx; /* for BACK_REF */ re_context_type ctx_type; /* for ANCHOR */ } opr; #if __GNUC__ >= 2 && !defined __STRICT_ANSI__ re_token_type_t type : 8; #else re_token_type_t type; #endif unsigned int constraint : 10; /* context constraint */ 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; #endif unsigned int word_char : 1; } re_token_t; #define IS_EPSILON_NODE(type) ((type) & EPSILON_BIT) struct re_string_t { /* Indicate the raw buffer which is the original string passed as an argument of regexec(), re_search(), etc.. */ const unsigned char *raw_mbs; /* Store the multibyte string. In case of "case insensitive mode" like REG_ICASE, upper cases of the string are stored, otherwise MBS points the same address that RAW_MBS points. */ unsigned char *mbs; #ifdef RE_ENABLE_I18N /* Store the wide character string which is corresponding to MBS. */ wint_t *wcs; Idx *offsets; mbstate_t cur_state; #endif /* Index in RAW_MBS. Each character mbs[i] corresponds to raw_mbs[raw_mbs_idx + i]. */ Idx raw_mbs_idx; /* The length of the valid characters in the buffers. */ Idx valid_len; /* The corresponding number of bytes in raw_mbs array. */ Idx valid_raw_len; /* The length of the buffers MBS and WCS. */ Idx bufs_len; /* The index in MBS, which is updated by re_string_fetch_byte. */ Idx cur_idx; /* length of RAW_MBS array. */ Idx raw_len; /* This is RAW_LEN - RAW_MBS_IDX + VALID_LEN - VALID_RAW_LEN. */ Idx len; /* End of the buffer may be shorter than its length in the cases such as re_match_2, re_search_2. Then, we use STOP for end of the buffer instead of LEN. */ Idx raw_stop; /* This is RAW_STOP - RAW_MBS_IDX adjusted through OFFSETS. */ Idx stop; /* The context of mbs[0]. We store the context independently, since the context of mbs[0] may be different from raw_mbs[0], which is the beginning of the input string. */ 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; /* true 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; struct re_dfa_t; typedef struct re_dfa_t re_dfa_t; #ifndef _LIBC # define IS_IN(libc) false #endif #define re_string_peek_byte(pstr, offset) \ ((pstr)->mbs[(pstr)->cur_idx + offset]) #define re_string_fetch_byte(pstr) \ ((pstr)->mbs[(pstr)->cur_idx++]) #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) + 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_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)) #if defined _LIBC || HAVE_ALLOCA # include #endif #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 # undef alloca # define alloca(n) malloc (n) # endif #endif #ifdef _LIBC # define MALLOC_0_IS_NONNULL 1 #elif !defined MALLOC_0_IS_NONNULL # define MALLOC_0_IS_NONNULL 0 #endif #ifndef MAX # define MAX(a,b) ((a) < (b) ? (b) : (a)) #endif #ifndef MIN # define MIN(a,b) ((a) < (b) ? (a) : (b)) #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 { 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. */ Idx node_idx; }; typedef struct bin_tree_t bin_tree_t; #define BIN_TREE_STORAGE_SIZE \ ((1024 - sizeof (void *)) / sizeof (bin_tree_t)) struct bin_tree_storage_t { struct bin_tree_storage_t *next; bin_tree_t data[BIN_TREE_STORAGE_SIZE]; }; typedef struct bin_tree_storage_t bin_tree_storage_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 { re_hashval_t 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, **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 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; struct re_state_table_entry { Idx num; Idx alloc; re_dfastate_t **array; }; /* Array type used in re_sub_match_last_t and re_sub_match_top_t. */ typedef struct { Idx next_idx; Idx alloc; re_dfastate_t **array; } state_array_t; /* Store information about the node NODE whose type is OP_CLOSE_SUBEXP. */ typedef struct { Idx node; Idx 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 { Idx str_idx; Idx node; state_array_t *path; Idx alasts; /* Allocation size of LASTS. */ Idx nlasts; /* The number of LASTS. */ re_sub_match_last_t **lasts; } re_sub_match_top_t; struct re_backref_cache_entry { Idx node; Idx str_idx; Idx subexp_from; Idx subexp_to; 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. */ Idx match_last; Idx last_node; /* The state log used by the matcher. */ re_dfastate_t **state_log; Idx state_log_top; /* Back reference cache. */ Idx nbkref_ents; Idx abkref_ents; struct re_backref_cache_entry *bkref_ents; int max_mb_elem_len; Idx nsub_tops; Idx asub_tops; re_sub_match_top_t **sub_tops; } re_match_context_t; typedef struct { re_dfastate_t **sifted_states; re_dfastate_t **limited_states; Idx last_node; Idx last_str_idx; re_node_set limits; } re_sift_context_t; struct re_fail_stack_ent_t { Idx idx; Idx node; regmatch_t *regs; re_node_set eps_via_nodes; }; struct re_fail_stack_t { Idx num; Idx alloc; struct re_fail_stack_ent_t *stack; }; struct re_dfa_t { re_token_t *nodes; size_t nodes_alloc; size_t nodes_len; Idx *nexts; Idx *org_indices; re_node_set *edests; re_node_set *eclosures; re_node_set *inveclosures; struct re_state_table_entry *state_table; re_dfastate_t *init_state; re_dfastate_t *init_state_word; re_dfastate_t *init_state_nl; re_dfastate_t *init_state_begbuf; bin_tree_t *str_tree; bin_tree_storage_t *str_tree_storage; re_bitset_ptr_t sb_char; int str_tree_storage_idx; /* number of subexpressions 're_nsub' is in regex_t. */ re_hashval_t state_hash_mask; Idx init_node; Idx nbackref; /* The number of backreference in this dfa. */ /* Bitmap expressing which backreference is used. */ 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 collating element. */ 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; Idx *subexp_map; #ifdef DEBUG char* re_str; #endif lock_define (lock) }; #define re_node_set_init_empty(set) memset (set, '\0', sizeof (re_node_set)) #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) 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; /* Functions for bitset_t operation. */ static inline void bitset_set (bitset_t set, Idx i) { set[i / BITSET_WORD_BITS] |= (bitset_word_t) 1 << i % BITSET_WORD_BITS; } static inline void bitset_clear (bitset_t set, Idx i) { set[i / BITSET_WORD_BITS] &= ~ ((bitset_word_t) 1 << i % BITSET_WORD_BITS); } static inline bool bitset_contain (const bitset_t set, Idx i) { return (set[i / BITSET_WORD_BITS] >> i % BITSET_WORD_BITS) & 1; } static inline void bitset_empty (bitset_t set) { memset (set, '\0', sizeof (bitset_t)); } static inline void bitset_set_all (bitset_t set) { memset (set, -1, sizeof (bitset_word_t) * (SBC_MAX / BITSET_WORD_BITS)); if (SBC_MAX % BITSET_WORD_BITS != 0) set[BITSET_WORDS - 1] = ((bitset_word_t) 1 << SBC_MAX % BITSET_WORD_BITS) - 1; } static inline void bitset_copy (bitset_t dest, const bitset_t src) { memcpy (dest, src, sizeof (bitset_t)); } static inline void bitset_not (bitset_t set) { int bitset_i; for (bitset_i = 0; bitset_i < SBC_MAX / BITSET_WORD_BITS; ++bitset_i) set[bitset_i] = ~set[bitset_i]; if (SBC_MAX % BITSET_WORD_BITS != 0) set[BITSET_WORDS - 1] = ((((bitset_word_t) 1 << SBC_MAX % BITSET_WORD_BITS) - 1) & ~set[BITSET_WORDS - 1]); } static inline void bitset_merge (bitset_t dest, const bitset_t src) { int bitset_i; for (bitset_i = 0; bitset_i < BITSET_WORDS; ++bitset_i) dest[bitset_i] |= src[bitset_i]; } static inline void bitset_mask (bitset_t dest, const bitset_t src) { int bitset_i; for (bitset_i = 0; bitset_i < BITSET_WORDS; ++bitset_i) dest[bitset_i] &= src[bitset_i]; } #ifdef RE_ENABLE_I18N /* Functions for re_string. */ static int __attribute__ ((pure, unused)) re_string_char_size_at (const re_string_t *pstr, Idx idx) { int byte_idx; if (pstr->mb_cur_max == 1) return 1; for (byte_idx = 1; idx + byte_idx < pstr->valid_len; ++byte_idx) if (pstr->wcs[idx + byte_idx] != WEOF) break; return byte_idx; } static wint_t __attribute__ ((pure, unused)) re_string_wchar_at (const re_string_t *pstr, Idx idx) { if (pstr->mb_cur_max == 1) return (wint_t) pstr->mbs[idx]; return (wint_t) pstr->wcs[idx]; } # ifdef _LIBC # include # endif static int __attribute__ ((pure, unused)) re_string_elem_size_at (const re_string_t *pstr, Idx idx) { # ifdef _LIBC const unsigned char *p, *extra; const int32_t *table, *indirect; 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; findidx (table, indirect, extra, &p, pstr->len - idx); return p - pstr->mbs - idx; } else # endif /* _LIBC */ return 1; } #endif /* RE_ENABLE_I18N */ #ifndef __GNUC_PREREQ # if defined __GNUC__ && defined __GNUC_MINOR__ # define __GNUC_PREREQ(maj, min) \ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) # else # define __GNUC_PREREQ(maj, min) 0 # endif #endif #if __GNUC_PREREQ (3,4) # undef __attribute_warn_unused_result__ # define __attribute_warn_unused_result__ \ __attribute__ ((__warn_unused_result__)) #else # define __attribute_warn_unused_result__ /* empty */ #endif #ifndef FALLTHROUGH # if __GNUC__ < 7 # define FALLTHROUGH ((void) 0) # else # define FALLTHROUGH __attribute__ ((__fallthrough__)) # endif #endif #endif /* _REGEX_INTERNAL_H */