text: #ifndef ONIGURUMA_REGINT_H
  #define ONIGURUMA_REGINT_H
  /**********************************************************************
    regint.h -  Oniguruma (regular expression library)
  **********************************************************************/
  /*-
   * Copyright (c) 2002-2007  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  /* for debug */
  /* #define ONIG_DEBUG_PARSE_TREE */
  /* #define ONIG_DEBUG_COMPILE */
  /* #define ONIG_DEBUG_SEARCH */
  /* #define ONIG_DEBUG_MATCH */
  /* #define ONIG_DONT_OPTIMIZE */
  
  /* for byte-code statistical data. */
  /* #define ONIG_DEBUG_STATISTICS */
  
  #if defined(ONIG_DEBUG_PARSE_TREE) || defined(ONIG_DEBUG_MATCH) || \
      defined(ONIG_DEBUG_SEARCH) || defined(ONIG_DEBUG_COMPILE) || \
      defined(ONIG_DEBUG_STATISTICS)
  #ifndef ONIG_DEBUG
  #define ONIG_DEBUG
  #endif
  #endif
  
  #if defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
      (defined(__ppc__) && defined(__APPLE__)) || \
      defined(__x86_64) || defined(__x86_64__) || defined(_M_AMD86) || \
      defined(__mc68020__)
  #define PLATFORM_UNALIGNED_WORD_ACCESS
  #endif
  
  /* config */
  /* spec. config */
  #define USE_NAMED_GROUP
  #define USE_SUBEXP_CALL
  #define USE_BACKREF_WITH_LEVEL        /* \k<name+n>, \k<name-n> */
  #define USE_MONOMANIAC_CHECK_CAPTURES_IN_ENDLESS_REPEAT  /* /(?:()|())*\2/ */
  #define USE_NEWLINE_AT_END_OF_STRING_HAS_EMPTY_LINE     /* /\n$/ =~ "\n" */
  #define USE_WARNING_REDUNDANT_NESTED_REPEAT_OPERATOR
  /* #define USE_RECOMPILE_API */
  /* !!! moved to regenc.h. */ /* #define USE_CRNL_AS_LINE_TERMINATOR */
  
  /* internal config */
  #define USE_PARSE_TREE_NODE_RECYCLE
  #define USE_OP_PUSH_OR_JUMP_EXACT
  #define USE_QTFR_PEEK_NEXT
  #define USE_ST_LIBRARY
  #define USE_SHARED_CCLASS_TABLE
  
  #define INIT_MATCH_STACK_SIZE                     160
  #define DEFAULT_MATCH_STACK_LIMIT_SIZE              0 /* unlimited */
  
  #if defined(__GNUC__)
  #  define ARG_UNUSED  __attribute__ ((unused))
  #else
  #  define ARG_UNUSED
  #endif
  
  /* */
  /* escape other system UChar definition */
  #ifndef RUBY_DEFINES_H
  #include "ruby/ruby.h"
  #undef xmalloc
  #undef xrealloc
  #undef xcalloc
  #undef xfree
  #endif
  #ifdef ONIG_ESCAPE_UCHAR_COLLISION
  #undef ONIG_ESCAPE_UCHAR_COLLISION
  #endif
  #undef USE_MATCH_RANGE_IS_COMPLETE_RANGE
  #undef USE_CAPTURE_HISTORY
  #define USE_VARIABLE_META_CHARS
  #define USE_WORD_BEGIN_END          /* "\<": word-begin, "\>": word-end */
  #define USE_POSIX_REGION_OPTION     /* needed for POSIX API support */
  #define USE_FIND_LONGEST_SEARCH_ALL_OF_RANGE
  /* #define USE_COMBINATION_EXPLOSION_CHECK */     /* (X*)* */
  /* #define USE_MULTI_THREAD_SYSTEM */
  #define THREAD_SYSTEM_INIT      /* depend on thread system */
  #define THREAD_SYSTEM_END       /* depend on thread system */
  #define THREAD_ATOMIC_START     /* depend on thread system */
  #define THREAD_ATOMIC_END       /* depend on thread system */
  #define THREAD_PASS             /* depend on thread system */
  #ifndef xmalloc
  #define xmalloc     malloc
  #define xrealloc    realloc
  #define xcalloc     calloc
  #define xfree       free
  #endif
  
  #ifdef RUBY
  
  #define CHECK_INTERRUPT_IN_MATCH_AT rb_thread_check_ints()
  #define onig_st_init_table                  st_init_table
  #define onig_st_init_table_with_size        st_init_table_with_size
  #define onig_st_init_numtable               st_init_numtable
  #define onig_st_init_numtable_with_size     st_init_numtable_with_size
  #define onig_st_init_strtable               st_init_strtable
  #define onig_st_init_strtable_with_size     st_init_strtable_with_size
  #define onig_st_delete                      st_delete
  #define onig_st_delete_safe                 st_delete_safe
  #define onig_st_insert                      st_insert
  #define onig_st_lookup                      st_lookup
  #define onig_st_foreach                     st_foreach
  #define onig_st_add_direct                  st_add_direct
  #define onig_st_free_table                  st_free_table
  #define onig_st_cleanup_safe                st_cleanup_safe
  #define onig_st_copy                        st_copy
  #define onig_st_nothing_key_clone           st_nothing_key_clone
  #define onig_st_nothing_key_free            st_nothing_key_free
  #define onig_st_is_member                   st_is_member
  
  #define USE_UPPER_CASE_TABLE
  #else
  
  #define st_init_table                  onig_st_init_table
  #define st_init_table_with_size        onig_st_init_table_with_size
  #define st_init_numtable               onig_st_init_numtable
  #define st_init_numtable_with_size     onig_st_init_numtable_with_size
  #define st_init_strtable               onig_st_init_strtable
  #define st_init_strtable_with_size     onig_st_init_strtable_with_size
  #define st_delete                      onig_st_delete
  #define st_delete_safe                 onig_st_delete_safe
  #define st_insert                      onig_st_insert
  #define st_lookup                      onig_st_lookup
  #define st_foreach                     onig_st_foreach
  #define st_add_direct                  onig_st_add_direct
  #define st_free_table                  onig_st_free_table
  #define st_cleanup_safe                onig_st_cleanup_safe
  #define st_copy                        onig_st_copy
  #define st_nothing_key_clone           onig_st_nothing_key_clone
  #define st_nothing_key_free            onig_st_nothing_key_free
  /* */
  #define onig_st_is_member              st_is_member
  
  #define CHECK_INTERRUPT_IN_MATCH_AT
  
  #endif
  
  #define STATE_CHECK_STRING_THRESHOLD_LEN             7
  #define STATE_CHECK_BUFF_MAX_SIZE               0x4000
  
  #define THREAD_PASS_LIMIT_COUNT     8
  #define xmemset     memset
  #define xmemcpy     memcpy
  #define xmemmove    memmove
  
  #if defined(_WIN32) && !defined(__GNUC__)
  #define xalloca     _alloca
  #define xvsnprintf  _vsnprintf
  #else
  #define xalloca     alloca
  #define xvsnprintf  vsnprintf
  #endif
  
  
  #if defined(USE_RECOMPILE_API) && defined(USE_MULTI_THREAD_SYSTEM)
  #define ONIG_STATE_INC(reg) (reg)->state++
  #define ONIG_STATE_DEC(reg) (reg)->state--
  
  #define ONIG_STATE_INC_THREAD(reg) do {\
    THREAD_ATOMIC_START;\
    (reg)->state++;\
    THREAD_ATOMIC_END;\
  } while(0)
  #define ONIG_STATE_DEC_THREAD(reg) do {\
    THREAD_ATOMIC_START;\
    (reg)->state--;\
    THREAD_ATOMIC_END;\
  } while(0)
  #else
  #define ONIG_STATE_INC(reg)         /* Nothing */
  #define ONIG_STATE_DEC(reg)         /* Nothing */
  #define ONIG_STATE_INC_THREAD(reg)  /* Nothing */
  #define ONIG_STATE_DEC_THREAD(reg)  /* Nothing */
  #endif /* USE_RECOMPILE_API && USE_MULTI_THREAD_SYSTEM */
  
  #ifdef HAVE_STDLIB_H
  #include <stdlib.h>
  #endif
  
  #if defined(HAVE_ALLOCA_H) && (defined(_AIX) || !defined(__GNUC__))
  #include <alloca.h>
  #endif
  
  #ifdef HAVE_STRING_H
  # include <string.h>
  #else
  # include <strings.h>
  #endif
  
  #include <ctype.h>
  #ifdef HAVE_SYS_TYPES_H
  #include <sys/types.h>
  #endif
  
  #ifdef ONIG_DEBUG
  # include <stdio.h>
  #endif
  
  #include "regenc.h"
  
  #ifdef MIN
  #undef MIN
  #endif
  #ifdef MAX
  #undef MAX
  #endif
  #define MIN(a,b) (((a)>(b))?(b):(a))
  #define MAX(a,b) (((a)<(b))?(b):(a))
  
  #define IS_NULL(p)                    (((void*)(p)) == (void*)0)
  #define IS_NOT_NULL(p)                (((void*)(p)) != (void*)0)
  #define CHECK_NULL_RETURN(p)          if (IS_NULL(p)) return NULL
  #define CHECK_NULL_RETURN_MEMERR(p)   if (IS_NULL(p)) return ONIGERR_MEMORY
  #define NULL_UCHARP                   ((UChar* )0)
  
  #ifdef PLATFORM_UNALIGNED_WORD_ACCESS
  
  #define PLATFORM_GET_INC(val,p,type) do{\
    val  = *(type* )p;\
    (p) += sizeof(type);\
  } while(0)
  
  #else
  
  #define PLATFORM_GET_INC(val,p,type) do{\
    xmemcpy(&val, (p), sizeof(type));\
    (p) += sizeof(type);\
  } while(0)
  
  /* sizeof(OnigCodePoint) */
  #define WORD_ALIGNMENT_SIZE     SIZEOF_LONG
  
  #define GET_ALIGNMENT_PAD_SIZE(addr,pad_size) do {\
    (pad_size) = WORD_ALIGNMENT_SIZE \
                 - ((uintptr_t )(addr) % WORD_ALIGNMENT_SIZE);\
    if ((pad_size) == WORD_ALIGNMENT_SIZE) (pad_size) = 0;\
  } while (0)
  
  #define ALIGNMENT_RIGHT(addr) do {\
    (addr) += (WORD_ALIGNMENT_SIZE - 1);\
    (addr) -= ((uintptr_t )(addr) % WORD_ALIGNMENT_SIZE);\
  } while (0)
  
  #endif /* PLATFORM_UNALIGNED_WORD_ACCESS */
  
  /* stack pop level */
  #define STACK_POP_LEVEL_FREE        0
  #define STACK_POP_LEVEL_MEM_START   1
  #define STACK_POP_LEVEL_ALL         2
  
  /* optimize flags */
  #define ONIG_OPTIMIZE_NONE              0
  #define ONIG_OPTIMIZE_EXACT             1   /* Slow Search */
  #define ONIG_OPTIMIZE_EXACT_BM          2   /* Boyer Moore Search */
  #define ONIG_OPTIMIZE_EXACT_BM_NOT_REV  3   /* BM   (but not simple match) */
  #define ONIG_OPTIMIZE_EXACT_IC          4   /* Slow Search (ignore case) */
  #define ONIG_OPTIMIZE_MAP               5   /* char map */
  
  /* bit status */
  typedef unsigned int  BitStatusType;
  
  #define BIT_STATUS_BITS_NUM          (sizeof(BitStatusType) * 8)
  #define BIT_STATUS_CLEAR(stats)      (stats) = 0
  #define BIT_STATUS_ON_ALL(stats)     (stats) = ~((BitStatusType )0)
  #define BIT_STATUS_AT(stats,n) \
    ((n) < (int )BIT_STATUS_BITS_NUM  ?  ((stats) & (1 << n)) : ((stats) & 1))
  
  #define BIT_STATUS_ON_AT(stats,n) do {\
      if ((n) < (int )BIT_STATUS_BITS_NUM)	\
      (stats) |= (1 << (n));\
    else\
      (stats) |= 1;\
  } while (0)
  
  #define BIT_STATUS_ON_AT_SIMPLE(stats,n) do {\
      if ((n) < (int )BIT_STATUS_BITS_NUM)\
      (stats) |= (1 << (n));\
  } while (0)
  
  
  #define INT_MAX_LIMIT           ((1UL << (SIZEOF_INT * 8 - 1)) - 1)
  
  #define DIGITVAL(code)    ((code) - '0')
  #define ODIGITVAL(code)   DIGITVAL(code)
  #define XDIGITVAL(enc,code) \
    (ONIGENC_IS_CODE_DIGIT(enc,code) ? DIGITVAL(code) \
     : (ONIGENC_IS_CODE_UPPER(enc,code) ? (code) - 'A' + 10 : (code) - 'a' + 10))
  
  #define IS_SINGLELINE(option)     ((option) & ONIG_OPTION_SINGLELINE)
  #define IS_MULTILINE(option)      ((option) & ONIG_OPTION_MULTILINE)
  #define IS_IGNORECASE(option)     ((option) & ONIG_OPTION_IGNORECASE)
  #define IS_EXTEND(option)         ((option) & ONIG_OPTION_EXTEND)
  #define IS_FIND_LONGEST(option)   ((option) & ONIG_OPTION_FIND_LONGEST)
  #define IS_FIND_NOT_EMPTY(option) ((option) & ONIG_OPTION_FIND_NOT_EMPTY)
  #define IS_FIND_CONDITION(option) ((option) & \
            (ONIG_OPTION_FIND_LONGEST | ONIG_OPTION_FIND_NOT_EMPTY))
  #define IS_NOTBOL(option)         ((option) & ONIG_OPTION_NOTBOL)
  #define IS_NOTEOL(option)         ((option) & ONIG_OPTION_NOTEOL)
  #define IS_POSIX_REGION(option)   ((option) & ONIG_OPTION_POSIX_REGION)
  
  /* OP_SET_OPTION is required for these options.
  #define IS_DYNAMIC_OPTION(option) \
    (((option) & (ONIG_OPTION_MULTILINE | ONIG_OPTION_IGNORECASE)) != 0)
  */
  /* ignore-case and multibyte status are included in compiled code. */
  #define IS_DYNAMIC_OPTION(option)  0
  
  #define DISABLE_CASE_FOLD_MULTI_CHAR(case_fold_flag) \
    ((case_fold_flag) & ~INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR)
  
  #define REPEAT_INFINITE         -1
  #define IS_REPEAT_INFINITE(n)   ((n) == REPEAT_INFINITE)
  
  /* bitset */
  #define BITS_PER_BYTE      8
  #define SINGLE_BYTE_SIZE   (1 << BITS_PER_BYTE)
  #define BITS_IN_ROOM       (sizeof(Bits) * BITS_PER_BYTE)
  #define BITSET_SIZE        (SINGLE_BYTE_SIZE / BITS_IN_ROOM)
  
  #ifdef PLATFORM_UNALIGNED_WORD_ACCESS
  typedef unsigned int   Bits;
  #else
  typedef unsigned char  Bits;
  #endif
  typedef Bits           BitSet[BITSET_SIZE];
  typedef Bits*          BitSetRef;
  
  #define SIZE_BITSET        (int)sizeof(BitSet)
  
  #define BITSET_CLEAR(bs) do {\
    int i;\
    for (i = 0; i < (int )BITSET_SIZE; i++) { (bs)[i] = 0; }	\
  } while (0)
  
  #define BS_ROOM(bs,pos)            (bs)[pos / BITS_IN_ROOM]
  #define BS_BIT(pos)                (1 << (pos % BITS_IN_ROOM))
  
  #define BITSET_AT(bs, pos)         (BS_ROOM(bs,pos) & BS_BIT(pos))
  #define BITSET_SET_BIT(bs, pos)     BS_ROOM(bs,pos) |= BS_BIT(pos)
  #define BITSET_CLEAR_BIT(bs, pos)   BS_ROOM(bs,pos) &= ~(BS_BIT(pos))
  #define BITSET_INVERT_BIT(bs, pos)  BS_ROOM(bs,pos) ^= BS_BIT(pos)
  
  /* bytes buffer */
  typedef struct _BBuf {
    UChar* p;
    unsigned int used;
    unsigned int alloc;
  } BBuf;
  
  #define BBUF_INIT(buf,size)    onig_bbuf_init((BBuf* )(buf), (size))
  
  #define BBUF_SIZE_INC(buf,inc) do{\
    (buf)->alloc += (inc);\
    (buf)->p = (UChar* )xrealloc((buf)->p, (buf)->alloc);\
    if (IS_NULL((buf)->p)) return(ONIGERR_MEMORY);\
  } while (0)
  
  #define BBUF_EXPAND(buf,low) do{\
    do { (buf)->alloc *= 2; } while ((buf)->alloc < (unsigned int )low);\
    (buf)->p = (UChar* )xrealloc((buf)->p, (buf)->alloc);\
    if (IS_NULL((buf)->p)) return(ONIGERR_MEMORY);\
  } while (0)
  
  #define BBUF_ENSURE_SIZE(buf,size) do{\
    unsigned int new_alloc = (buf)->alloc;\
    while (new_alloc < (unsigned int )(size)) { new_alloc *= 2; }\
    if ((buf)->alloc != new_alloc) {\
      (buf)->p = (UChar* )xrealloc((buf)->p, new_alloc);\
      if (IS_NULL((buf)->p)) return(ONIGERR_MEMORY);\
      (buf)->alloc = new_alloc;\
    }\
  } while (0)
  
  #define BBUF_WRITE(buf,pos,bytes,n) do{\
    int used = (pos) + (n);\
    if ((buf)->alloc < (unsigned int )used) BBUF_EXPAND((buf),used);\
    xmemcpy((buf)->p + (pos), (bytes), (n));\
    if ((buf)->used < (unsigned int )used) (buf)->used = used;\
  } while (0)
  
  #define BBUF_WRITE1(buf,pos,byte) do{\
    int used = (pos) + 1;\
    if ((buf)->alloc < (unsigned int )used) BBUF_EXPAND((buf),used);\
    (buf)->p[(pos)] = (byte);\
    if ((buf)->used < (unsigned int )used) (buf)->used = used;\
  } while (0)
  
  #define BBUF_ADD(buf,bytes,n)       BBUF_WRITE((buf),(buf)->used,(bytes),(n))
  #define BBUF_ADD1(buf,byte)         BBUF_WRITE1((buf),(buf)->used,(byte))
  #define BBUF_GET_ADD_ADDRESS(buf)   ((buf)->p + (buf)->used)
  #define BBUF_GET_OFFSET_POS(buf)    ((buf)->used)
  
  /* from < to */
  #define BBUF_MOVE_RIGHT(buf,from,to,n) do {\
    if ((unsigned int )((to)+(n)) > (buf)->alloc) BBUF_EXPAND((buf),(to) + (n));\
    xmemmove((buf)->p + (to), (buf)->p + (from), (n));\
    if ((unsigned int )((to)+(n)) > (buf)->used) (buf)->used = (to) + (n);\
  } while (0)
  
  /* from > to */
  #define BBUF_MOVE_LEFT(buf,from,to,n) do {\
    xmemmove((buf)->p + (to), (buf)->p + (from), (n));\
  } while (0)
  
  /* from > to */
  #define BBUF_MOVE_LEFT_REDUCE(buf,from,to) do {\
    xmemmove((buf)->p + (to), (buf)->p + (from), (buf)->used - (from));\
    (buf)->used -= (from - to);\
  } while (0)
  
  #define BBUF_INSERT(buf,pos,bytes,n) do {\
    if (pos >= (buf)->used) {\
      BBUF_WRITE(buf,pos,bytes,n);\
    }\
    else {\
      BBUF_MOVE_RIGHT((buf),(pos),(pos) + (n),((buf)->used - (pos)));\
      xmemcpy((buf)->p + (pos), (bytes), (n));\
    }\
  } while (0)
  
  #define BBUF_GET_BYTE(buf, pos) (buf)->p[(pos)]
  
  
  #define ANCHOR_BEGIN_BUF        (1<<0)
  #define ANCHOR_BEGIN_LINE       (1<<1)
  #define ANCHOR_BEGIN_POSITION   (1<<2)
  #define ANCHOR_END_BUF          (1<<3)
  #define ANCHOR_SEMI_END_BUF     (1<<4)
  #define ANCHOR_END_LINE         (1<<5)
  
  #define ANCHOR_WORD_BOUND       (1<<6)
  #define ANCHOR_NOT_WORD_BOUND   (1<<7)
  #define ANCHOR_WORD_BEGIN       (1<<8)
  #define ANCHOR_WORD_END         (1<<9)
  #define ANCHOR_PREC_READ        (1<<10)
  #define ANCHOR_PREC_READ_NOT    (1<<11)
  #define ANCHOR_LOOK_BEHIND      (1<<12)
  #define ANCHOR_LOOK_BEHIND_NOT  (1<<13)
  
  #define ANCHOR_ANYCHAR_STAR     (1<<14)   /* ".*" optimize info */
  #define ANCHOR_ANYCHAR_STAR_ML  (1<<15)   /* ".*" optimize info (multi-line) */
  
  /* operation code */
  enum OpCode {
    OP_FINISH = 0,        /* matching process terminator (no more alternative) */
    OP_END    = 1,        /* pattern code terminator (success end) */
  
    OP_EXACT1 = 2,        /* single byte, N = 1 */
    OP_EXACT2,            /* single byte, N = 2 */
    OP_EXACT3,            /* single byte, N = 3 */
    OP_EXACT4,            /* single byte, N = 4 */
    OP_EXACT5,            /* single byte, N = 5 */
    OP_EXACTN,            /* single byte */
    OP_EXACTMB2N1,        /* mb-length = 2 N = 1 */
    OP_EXACTMB2N2,        /* mb-length = 2 N = 2 */
    OP_EXACTMB2N3,        /* mb-length = 2 N = 3 */
    OP_EXACTMB2N,         /* mb-length = 2 */
    OP_EXACTMB3N,         /* mb-length = 3 */
    OP_EXACTMBN,          /* other length */
  
    OP_EXACT1_IC,         /* single byte, N = 1, ignore case */
    OP_EXACTN_IC,         /* single byte,        ignore case */
  
    OP_CCLASS,
    OP_CCLASS_MB,
    OP_CCLASS_MIX,
    OP_CCLASS_NOT,
    OP_CCLASS_MB_NOT,
    OP_CCLASS_MIX_NOT,
    OP_CCLASS_NODE,       /* pointer to CClassNode node */
  
    OP_ANYCHAR,                 /* "."  */
    OP_ANYCHAR_ML,              /* "."  multi-line */
    OP_ANYCHAR_STAR,            /* ".*" */
    OP_ANYCHAR_ML_STAR,         /* ".*" multi-line */
    OP_ANYCHAR_STAR_PEEK_NEXT,
    OP_ANYCHAR_ML_STAR_PEEK_NEXT,
  
    OP_WORD,
    OP_NOT_WORD,
    OP_WORD_BOUND,
    OP_NOT_WORD_BOUND,
    OP_WORD_BEGIN,
    OP_WORD_END,
  
    OP_BEGIN_BUF,
    OP_END_BUF,
    OP_BEGIN_LINE,
    OP_END_LINE,
    OP_SEMI_END_BUF,
    OP_BEGIN_POSITION,
  
    OP_BACKREF1,
    OP_BACKREF2,
    OP_BACKREFN,
    OP_BACKREFN_IC,
    OP_BACKREF_MULTI,
    OP_BACKREF_MULTI_IC,
    OP_BACKREF_WITH_LEVEL,    /* \k<xxx+n>, \k<xxx-n> */
  
    OP_MEMORY_START,
    OP_MEMORY_START_PUSH,   /* push back-tracker to stack */
    OP_MEMORY_END_PUSH,     /* push back-tracker to stack */
    OP_MEMORY_END_PUSH_REC, /* push back-tracker to stack */
    OP_MEMORY_END,
    OP_MEMORY_END_REC,      /* push marker to stack */
  
    OP_FAIL,               /* pop stack and move */
    OP_JUMP,
    OP_PUSH,
    OP_POP,
    OP_PUSH_OR_JUMP_EXACT1,  /* if match exact then push, else jump. */
    OP_PUSH_IF_PEEK_NEXT,    /* if match exact then push, else none. */
    OP_REPEAT,               /* {n,m} */
    OP_REPEAT_NG,            /* {n,m}? (non greedy) */
    OP_REPEAT_INC,
    OP_REPEAT_INC_NG,        /* non greedy */
    OP_REPEAT_INC_SG,        /* search and get in stack */
    OP_REPEAT_INC_NG_SG,     /* search and get in stack (non greedy) */
    OP_NULL_CHECK_START,     /* null loop checker start */
    OP_NULL_CHECK_END,       /* null loop checker end   */
    OP_NULL_CHECK_END_MEMST, /* null loop checker end (with capture status) */
    OP_NULL_CHECK_END_MEMST_PUSH, /* with capture status and push check-end */
  
    OP_PUSH_POS,             /* (?=...)  start */
    OP_POP_POS,              /* (?=...)  end   */
    OP_PUSH_POS_NOT,         /* (?!...)  start */
    OP_FAIL_POS,             /* (?!...)  end   */
    OP_PUSH_STOP_BT,         /* (?>...)  start */
    OP_POP_STOP_BT,          /* (?>...)  end   */
    OP_LOOK_BEHIND,          /* (?<=...) start (no needs end opcode) */
    OP_PUSH_LOOK_BEHIND_NOT, /* (?<!...) start */
    OP_FAIL_LOOK_BEHIND_NOT, /* (?<!...) end   */
  
    OP_CALL,                 /* \g<name> */
    OP_RETURN,
  
    OP_STATE_CHECK_PUSH,         /* combination explosion check and push */
    OP_STATE_CHECK_PUSH_OR_JUMP, /* check ok -> push, else jump  */
    OP_STATE_CHECK,              /* check only */
    OP_STATE_CHECK_ANYCHAR_STAR,
    OP_STATE_CHECK_ANYCHAR_ML_STAR,
  
    /* no need: IS_DYNAMIC_OPTION() == 0 */
    OP_SET_OPTION_PUSH,    /* set option and push recover option */
    OP_SET_OPTION          /* set option */
  };
  
  typedef int RelAddrType;
  typedef int AbsAddrType;
  typedef int LengthType;
  typedef int RepeatNumType;
  typedef short int MemNumType;
  typedef short int StateCheckNumType;
  typedef void* PointerType;
  
  #define SIZE_OPCODE           1
  #define SIZE_RELADDR          (int)sizeof(RelAddrType)
  #define SIZE_ABSADDR          (int)sizeof(AbsAddrType)
  #define SIZE_LENGTH           (int)sizeof(LengthType)
  #define SIZE_MEMNUM           (int)sizeof(MemNumType)
  #define SIZE_STATE_CHECK_NUM  (int)sizeof(StateCheckNumType)
  #define SIZE_REPEATNUM        (int)sizeof(RepeatNumType)
  #define SIZE_OPTION           (int)sizeof(OnigOptionType)
  #define SIZE_CODE_POINT       (int)sizeof(OnigCodePoint)
  #define SIZE_POINTER          (int)sizeof(PointerType)
  
  
  #define GET_RELADDR_INC(addr,p)    PLATFORM_GET_INC(addr,   p, RelAddrType)
  #define GET_ABSADDR_INC(addr,p)    PLATFORM_GET_INC(addr,   p, AbsAddrType)
  #define GET_LENGTH_INC(len,p)      PLATFORM_GET_INC(len,    p, LengthType)
  #define GET_MEMNUM_INC(num,p)      PLATFORM_GET_INC(num,    p, MemNumType)
  #define GET_REPEATNUM_INC(num,p)   PLATFORM_GET_INC(num,    p, RepeatNumType)
  #define GET_OPTION_INC(option,p)   PLATFORM_GET_INC(option, p, OnigOptionType)
  #define GET_POINTER_INC(ptr,p)     PLATFORM_GET_INC(ptr,    p, PointerType)
  #define GET_STATE_CHECK_NUM_INC(num,p)  PLATFORM_GET_INC(num, p, StateCheckNumType)
  
  /* code point's address must be aligned address. */
  #define GET_CODE_POINT(code,p)   code = *((OnigCodePoint* )(p))
  #define GET_BYTE_INC(byte,p) do{\
    byte = *(p);\
    (p)++;\
  } while(0)
  
  
  /* op-code + arg size */
  #define SIZE_OP_ANYCHAR_STAR            SIZE_OPCODE
  #define SIZE_OP_ANYCHAR_STAR_PEEK_NEXT (SIZE_OPCODE + 1)
  #define SIZE_OP_JUMP                   (SIZE_OPCODE + SIZE_RELADDR)
  #define SIZE_OP_PUSH                   (SIZE_OPCODE + SIZE_RELADDR)
  #define SIZE_OP_POP                     SIZE_OPCODE
  #define SIZE_OP_PUSH_OR_JUMP_EXACT1    (SIZE_OPCODE + SIZE_RELADDR + 1)
  #define SIZE_OP_PUSH_IF_PEEK_NEXT      (SIZE_OPCODE + SIZE_RELADDR + 1)
  #define SIZE_OP_REPEAT_INC             (SIZE_OPCODE + SIZE_MEMNUM)
  #define SIZE_OP_REPEAT_INC_NG          (SIZE_OPCODE + SIZE_MEMNUM)
  #define SIZE_OP_PUSH_POS                SIZE_OPCODE
  #define SIZE_OP_PUSH_POS_NOT           (SIZE_OPCODE + SIZE_RELADDR)
  #define SIZE_OP_POP_POS                 SIZE_OPCODE
  #define SIZE_OP_FAIL_POS                SIZE_OPCODE
  #define SIZE_OP_SET_OPTION             (SIZE_OPCODE + SIZE_OPTION)
  #define SIZE_OP_SET_OPTION_PUSH        (SIZE_OPCODE + SIZE_OPTION)
  #define SIZE_OP_FAIL                    SIZE_OPCODE
  #define SIZE_OP_MEMORY_START           (SIZE_OPCODE + SIZE_MEMNUM)
  #define SIZE_OP_MEMORY_START_PUSH      (SIZE_OPCODE + SIZE_MEMNUM)
  #define SIZE_OP_MEMORY_END_PUSH        (SIZE_OPCODE + SIZE_MEMNUM)
  #define SIZE_OP_MEMORY_END_PUSH_REC    (SIZE_OPCODE + SIZE_MEMNUM)
  #define SIZE_OP_MEMORY_END             (SIZE_OPCODE + SIZE_MEMNUM)
  #define SIZE_OP_MEMORY_END_REC         (SIZE_OPCODE + SIZE_MEMNUM)
  #define SIZE_OP_PUSH_STOP_BT            SIZE_OPCODE
  #define SIZE_OP_POP_STOP_BT             SIZE_OPCODE
  #define SIZE_OP_NULL_CHECK_START       (SIZE_OPCODE + SIZE_MEMNUM)
  #define SIZE_OP_NULL_CHECK_END         (SIZE_OPCODE + SIZE_MEMNUM)
  #define SIZE_OP_LOOK_BEHIND            (SIZE_OPCODE + SIZE_LENGTH)
  #define SIZE_OP_PUSH_LOOK_BEHIND_NOT   (SIZE_OPCODE + SIZE_RELADDR + SIZE_LENGTH)
  #define SIZE_OP_FAIL_LOOK_BEHIND_NOT    SIZE_OPCODE
  #define SIZE_OP_CALL                   (SIZE_OPCODE + SIZE_ABSADDR)
  #define SIZE_OP_RETURN                  SIZE_OPCODE
  
  #ifdef USE_COMBINATION_EXPLOSION_CHECK
  #define SIZE_OP_STATE_CHECK            (SIZE_OPCODE + SIZE_STATE_CHECK_NUM)
  #define SIZE_OP_STATE_CHECK_PUSH       (SIZE_OPCODE + SIZE_STATE_CHECK_NUM + SIZE_RELADDR)
  #define SIZE_OP_STATE_CHECK_PUSH_OR_JUMP (SIZE_OPCODE + SIZE_STATE_CHECK_NUM + SIZE_RELADDR)
  #define SIZE_OP_STATE_CHECK_ANYCHAR_STAR (SIZE_OPCODE + SIZE_STATE_CHECK_NUM)
  #endif
  
  #define MC_ESC(syn)               (syn)->meta_char_table.esc
  #define MC_ANYCHAR(syn)           (syn)->meta_char_table.anychar
  #define MC_ANYTIME(syn)           (syn)->meta_char_table.anytime
  #define MC_ZERO_OR_ONE_TIME(syn)  (syn)->meta_char_table.zero_or_one_time
  #define MC_ONE_OR_MORE_TIME(syn)  (syn)->meta_char_table.one_or_more_time
  #define MC_ANYCHAR_ANYTIME(syn)   (syn)->meta_char_table.anychar_anytime
  
  #define IS_MC_ESC_CODE(code, syn) \
    ((code) == MC_ESC(syn) && \
     !IS_SYNTAX_OP2((syn), ONIG_SYN_OP2_INEFFECTIVE_ESCAPE))
  
  
  #define SYN_POSIX_COMMON_OP \
   ( ONIG_SYN_OP_DOT_ANYCHAR | ONIG_SYN_OP_POSIX_BRACKET | \
     ONIG_SYN_OP_DECIMAL_BACKREF | \
     ONIG_SYN_OP_BRACKET_CC | ONIG_SYN_OP_ASTERISK_ZERO_INF | \
     ONIG_SYN_OP_LINE_ANCHOR | \
     ONIG_SYN_OP_ESC_CONTROL_CHARS )
  
  #define SYN_GNU_REGEX_OP \
    ( ONIG_SYN_OP_DOT_ANYCHAR | ONIG_SYN_OP_BRACKET_CC | \
      ONIG_SYN_OP_POSIX_BRACKET | ONIG_SYN_OP_DECIMAL_BACKREF | \
      ONIG_SYN_OP_BRACE_INTERVAL | ONIG_SYN_OP_LPAREN_SUBEXP | \
      ONIG_SYN_OP_VBAR_ALT | \
      ONIG_SYN_OP_ASTERISK_ZERO_INF | ONIG_SYN_OP_PLUS_ONE_INF | \
      ONIG_SYN_OP_QMARK_ZERO_ONE | \
      ONIG_SYN_OP_ESC_AZ_BUF_ANCHOR | ONIG_SYN_OP_ESC_CAPITAL_G_BEGIN_ANCHOR | \
      ONIG_SYN_OP_ESC_W_WORD | \
      ONIG_SYN_OP_ESC_B_WORD_BOUND | ONIG_SYN_OP_ESC_LTGT_WORD_BEGIN_END | \
      ONIG_SYN_OP_ESC_S_WHITE_SPACE | ONIG_SYN_OP_ESC_D_DIGIT | \
      ONIG_SYN_OP_LINE_ANCHOR )
  
  #define SYN_GNU_REGEX_BV \
    ( ONIG_SYN_CONTEXT_INDEP_ANCHORS | ONIG_SYN_CONTEXT_INDEP_REPEAT_OPS | \
      ONIG_SYN_CONTEXT_INVALID_REPEAT_OPS | ONIG_SYN_ALLOW_INVALID_INTERVAL | \
      ONIG_SYN_BACKSLASH_ESCAPE_IN_CC | ONIG_SYN_ALLOW_DOUBLE_RANGE_OP_IN_CC )
  
  
  #define NCCLASS_FLAGS(cc)           ((cc)->flags)
  #define NCCLASS_FLAG_SET(cc,flag)    (NCCLASS_FLAGS(cc) |= (flag))
  #define NCCLASS_FLAG_CLEAR(cc,flag)  (NCCLASS_FLAGS(cc) &= ~(flag))
  #define IS_NCCLASS_FLAG_ON(cc,flag) ((NCCLASS_FLAGS(cc) & (flag)) != 0)
  
  /* cclass node */
  #define FLAG_NCCLASS_NOT           (1<<0)
  #define FLAG_NCCLASS_SHARE         (1<<1)
  
  #define NCCLASS_SET_NOT(nd)     NCCLASS_FLAG_SET(nd, FLAG_NCCLASS_NOT)
  #define NCCLASS_SET_SHARE(nd)   NCCLASS_FLAG_SET(nd, FLAG_NCCLASS_SHARE)
  #define NCCLASS_CLEAR_NOT(nd)   NCCLASS_FLAG_CLEAR(nd, FLAG_NCCLASS_NOT)
  #define IS_NCCLASS_NOT(nd)      IS_NCCLASS_FLAG_ON(nd, FLAG_NCCLASS_NOT)
  #define IS_NCCLASS_SHARE(nd)    IS_NCCLASS_FLAG_ON(nd, FLAG_NCCLASS_SHARE)
  
  typedef struct {
    int type;
    /* struct _Node* next; */
    /* unsigned int flags; */
  } NodeBase;
  
  typedef struct {
    NodeBase base;
    unsigned int flags;
    BitSet bs;
    BBuf*  mbuf;   /* multi-byte info or NULL */
  } CClassNode;
  
  typedef long OnigStackIndex;
  
  typedef struct _OnigStackType {
    unsigned int type;
    union {
      struct {
        UChar *pcode;      /* byte code position */
        UChar *pstr;       /* string position */
        UChar *pstr_prev;  /* previous char position of pstr */
  #ifdef USE_COMBINATION_EXPLOSION_CHECK
        unsigned int state_check;
  #endif
      } state;
      struct {
        int   count;       /* for OP_REPEAT_INC, OP_REPEAT_INC_NG */
        UChar *pcode;      /* byte code position (head of repeated target) */
        int   num;         /* repeat id */
      } repeat;
      struct {
        OnigStackIndex si;     /* index of stack */
      } repeat_inc;
      struct {
        int num;           /* memory num */
        UChar *pstr;       /* start/end position */
        /* Following information is setted, if this stack type is MEM-START */
        OnigStackIndex start;  /* prev. info (for backtrack  "(...)*" ) */
        OnigStackIndex end;    /* prev. info (for backtrack  "(...)*" ) */
      } mem;
      struct {
        int num;           /* null check id */
        UChar *pstr;       /* start position */
      } null_check;
  #ifdef USE_SUBEXP_CALL
      struct {
        UChar *ret_addr;   /* byte code position */
        int    num;        /* null check id */
        UChar *pstr;       /* string position */
      } call_frame;
  #endif
    } u;
  } OnigStackType;
  
  typedef struct {
    void* stack_p;
    size_t stack_n;
    OnigOptionType options;
    OnigRegion*    region;
    const UChar* start;   /* search start position (for \G: BEGIN_POSITION) */
  #ifdef USE_FIND_LONGEST_SEARCH_ALL_OF_RANGE
    int    best_len;      /* for ONIG_OPTION_FIND_LONGEST */
    UChar* best_s;
  #endif
  #ifdef USE_COMBINATION_EXPLOSION_CHECK
    void* state_check_buff;
    int   state_check_buff_size;
  #endif
  } OnigMatchArg;
  
  
  #define IS_CODE_SB_WORD(enc,code) \
    (ONIGENC_IS_CODE_ASCII(code) && ONIGENC_IS_CODE_WORD(enc,code))
  
  #ifdef ONIG_DEBUG
  
  typedef struct {
    short int opcode;
    char*     name;
    short int arg_type;
  } OnigOpInfoType;
  
  extern OnigOpInfoType OnigOpInfo[];
  
  extern void onig_print_compiled_byte_code P_((FILE* f, UChar* bp, UChar** nextp, OnigEncoding enc));
  
  #ifdef ONIG_DEBUG_STATISTICS
  extern void onig_statistics_init P_((void));
  extern void onig_print_statistics P_((FILE* f));
  #endif
  #endif
  
  extern UChar* onig_error_code_to_format P_((int code));
  extern void  onig_snprintf_with_pattern PV_((UChar buf[], int bufsize, OnigEncoding enc, UChar* pat, UChar* pat_end, const UChar *fmt, ...));
  extern int  onig_bbuf_init P_((BBuf* buf, int size));
  extern int  onig_alloc_init P_((regex_t** reg, OnigOptionType option, OnigCaseFoldType case_fold_flag, OnigEncoding enc, const OnigSyntaxType* syntax));
  extern int  onig_compile P_((regex_t* reg, const UChar* pattern, const UChar* pattern_end, OnigErrorInfo* einfo, const char *sourcefile, int sourceline));
  extern void onig_chain_reduce P_((regex_t* reg));
  extern void onig_chain_link_add P_((regex_t* to, regex_t* add));
  extern void onig_transfer P_((regex_t* to, regex_t* from));
  extern int  onig_is_code_in_cc P_((OnigEncoding enc, OnigCodePoint code, CClassNode* cc));
  extern int  onig_is_code_in_cc_len P_((int enclen, OnigCodePoint code, CClassNode* cc));
  
  /* strend hash */
  typedef void hash_table_type;
  #ifdef RUBY
  #include "ruby/st.h"
  typedef st_data_t hash_data_type;
  #else
  typedef unsigned long hash_data_type;
  #endif
  
  extern hash_table_type* onig_st_init_strend_table_with_size P_((st_index_t size));
  extern int onig_st_lookup_strend P_((hash_table_type* table, const UChar* str_key, const UChar* end_key, hash_data_type *value));
  extern int onig_st_insert_strend P_((hash_table_type* table, const UChar* str_key, const UChar* end_key, hash_data_type value));
  
  /* encoding property management */
  #define PROPERTY_LIST_ADD_PROP(Name, CR) \
    r = onigenc_property_list_add_property((UChar* )Name, CR,\
  	      &PropertyNameTable, &PropertyList, &PropertyListNum,\
  	      &PropertyListSize);\
    if (r != 0) goto end
  
  #define PROPERTY_LIST_INIT_CHECK \
    if (PropertyInited == 0) {\
      int r = onigenc_property_list_init(init_property_list);\
      if (r != 0) return r;\
    }
  
  extern int onigenc_property_list_add_property P_((UChar* name, const OnigCodePoint* prop, hash_table_type **table, const OnigCodePoint*** plist, int *pnum, int *psize));
  
  typedef int (*ONIGENC_INIT_PROPERTY_LIST_FUNC_TYPE)(void);
  
  extern int onigenc_property_list_init P_((ONIGENC_INIT_PROPERTY_LIST_FUNC_TYPE));
  
  #endif /* ONIGURUMA_REGINT_H */
  