// 
//   Copyright (C) 2002 International Business Machines Corporation 
//   and others. All rights reserved.  
//
//   file:  regeximp.h
//
//           ICU Regular Expressions, declarations of internal implementation types
//           and constants that are common between the pattern compiler and the 
//           runtime execution engine.
//

#ifndef _REGEXIMP_H
#define _REGEXIMP_H


//
//  Opcode types     In the compiled form of the regex, these are the type, or opcodes,
//                   of the entries.
//
static const uint32_t     URX_UNUSED1       = 1;
static const uint32_t     URX_END           = 2;
static const uint32_t     URX_ONECHAR       = 3;
static const uint32_t     URX_STRING        = 4;    // Value field is index of string start
static const uint32_t     URX_STRING_LEN    = 5;    // Value field is string length (code units)
static const uint32_t     URX_STATE_SAVE    = 6;    // Value field is pattern position to push
static const uint32_t     URX_NOP           = 7;
static const uint32_t     URX_START_CAPTURE = 8;    // Value field is capture group number.
static const uint32_t     URX_END_CAPTURE   = 9;    // Value field is capture group number
static const uint32_t     URX_STATIC_SETREF = 10;   // Value field is index of set in array of sets.   
static const uint32_t     URX_SETREF        = 11;   // Value field is index of set in array of sets.
static const uint32_t     URX_DOTANY        = 12; 
static const uint32_t     URX_JMP           = 13;   // Value field is destination position in
                                                    //   the pattern.
static const uint32_t     URX_FAIL          = 14;   // Stop match operation;  No match.

static const uint32_t     URX_BACKSLASH_A   = 15;   
static const uint32_t     URX_BACKSLASH_B   = 16;   // Value field:  0:  \b    1:  \B
static const uint32_t     URX_BACKSLASH_G   = 17; 
static const uint32_t     URX_BACKSLASH_W   = 18;   // Value field:  0:  \w    1:  \W
static const uint32_t     URX_BACKSLASH_X   = 19;
static const uint32_t     URX_BACKSLASH_Z   = 20;   // \z   Unconditional end of line.

static const uint32_t     URX_DOTANY_ALL    = 21;   // ., in the . matches any mode.
static const uint32_t     URX_BACKSLASH_D   = 22;   // Value field:  0:  \d    1:  \D
static const uint32_t     URX_CARET         = 23;   // Value field:  1:  multi-line mode.
static const uint32_t     URX_DOLLAR        = 24;   // Also for \Z


//
//  Convenience macros for assembling and disassembling a compiled operation.
//
#define URX_BUILD(type, val) (int32_t)((type << 24) | (val))
#define URX_TYPE(x)          ((x) >> 24) 
#define URX_VAL(x)           ((x) & 0xffffff)

                
//
//  Access to Unicode Sets for composite properties
//     The sets are accessed by the match engine for things like \w (word boundary)
//     
static const uint32_t     URX_ISWORD_SET  = 1;
static const uint32_t     URX_ISALNUM_SET = 2;
static const uint32_t     URX_ISALPHA_SET = 3;
static const uint32_t     URX_ISSPACE_SET = 4;
static const uint32_t     URX_LAST_SET    = 5;

static const uint32_t     URX_NEG_SET     = 0x800000;  // Flag bit to reverse sense of set
                                                       //   membership test.
#endif