lib/perl5/5.8.8/msys/CORE/regexp.h

   1 /*    regexp.h
   2  *
   3  *    Copyright (C) 1993, 1994, 1996, 1997, 1999, 2000, 2001, 2003,
   4  *    by Larry Wall and others
   5  *
   6  *    You may distribute under the terms of either the GNU General Public
   7  *    License or the Artistic License, as specified in the README file.
   8  *
   9  */
  10
  11 /*
  12  * Definitions etc. for regexp(3) routines.
  13  *
  14  * Caveat:  this is V8 regexp(3) [actually, a reimplementation thereof],
  15  * not the System V one.
  16  */
  17
  18
  19 struct regnode {
  20     U8  flags;
  21     U8  type;
  22     U16 next_off;
  23 };
  24
  25 typedef struct regnode regnode;
  26
  27 struct reg_substr_data;
  28
  29 struct reg_data;
  30
  31 typedef struct regexp {
  32         I32 *startp;
  33         I32 *endp;
  34         regnode *regstclass;
  35         struct reg_substr_data *substrs;
  36         char *precomp;          /* pre-compilation regular expression */
  37         struct reg_data *data;  /* Additional data. */
  38         char *subbeg;           /* saved or original string
  39                                    so \digit works forever. */
  40         U32 *offsets;           /* offset annotations 20001228 MJD */
  41         I32 sublen;             /* Length of string pointed by subbeg */
  42         I32 refcnt;
  43         I32 minlen;             /* mininum possible length of $& */
  44         I32 prelen;             /* length of precomp */
  45         U32 nparens;            /* number of parentheses */
  46         U32 lastparen;          /* last paren matched */
  47         U32 lastcloseparen;     /* last paren matched */
  48         U32 reganch;            /* Internal use only +
  49                                    Tainted information used by regexec? */
  50         regnode program[1];     /* Unwarranted chumminess with compiler. */
  51 } regexp;
  52
  53 #define ROPT_ANCH               (ROPT_ANCH_BOL|ROPT_ANCH_MBOL|ROPT_ANCH_GPOS|ROPT_ANCH_SBOL)
  54 #define ROPT_ANCH_SINGLE        (ROPT_ANCH_SBOL|ROPT_ANCH_GPOS)
  55 #define ROPT_ANCH_BOL           0x00001
  56 #define ROPT_ANCH_MBOL          0x00002
  57 #define ROPT_ANCH_SBOL          0x00004
  58 #define ROPT_ANCH_GPOS          0x00008
  59 #define ROPT_SKIP               0x00010
  60 #define ROPT_IMPLICIT           0x00020 /* Converted .* to ^.* */
  61 #define ROPT_NOSCAN             0x00040 /* Check-string always at start. */
  62 #define ROPT_GPOS_SEEN          0x00080
  63 #define ROPT_CHECK_ALL          0x00100
  64 #define ROPT_LOOKBEHIND_SEEN    0x00200
  65 #define ROPT_EVAL_SEEN          0x00400
  66 #define ROPT_CANY_SEEN          0x00800
  67 #define ROPT_SANY_SEEN          ROPT_CANY_SEEN /* src bckwrd cmpt */
  68
  69 /* 0xf800 of reganch is used by PMf_COMPILETIME */
  70
  71 #define ROPT_UTF8               0x10000
  72 #define ROPT_NAUGHTY            0x20000 /* how exponential is this pattern? */
  73 #define ROPT_COPY_DONE          0x40000 /* subbeg is a copy of the string */
  74 #define ROPT_TAINTED_SEEN       0x80000
  75 #define ROPT_MATCH_UTF8         0x10000000 /* subbeg is utf-8 */
  76
  77 #define RE_USE_INTUIT_NOML      0x0100000 /* Best to intuit before matching */
  78 #define RE_USE_INTUIT_ML        0x0200000
  79 #define REINT_AUTORITATIVE_NOML 0x0400000 /* Can trust a positive answer */
  80 #define REINT_AUTORITATIVE_ML   0x0800000
  81 #define REINT_ONCE_NOML         0x1000000 /* Intuit can succed once only. */
  82 #define REINT_ONCE_ML           0x2000000
  83 #define RE_INTUIT_ONECHAR       0x4000000
  84 #define RE_INTUIT_TAIL          0x8000000
  85
  86 #define RE_USE_INTUIT           (RE_USE_INTUIT_NOML|RE_USE_INTUIT_ML)
  87 #define REINT_AUTORITATIVE      (REINT_AUTORITATIVE_NOML|REINT_AUTORITATIVE_ML)
  88 #define REINT_ONCE              (REINT_ONCE_NOML|REINT_ONCE_ML)
  89
  90 #define RX_MATCH_TAINTED(prog)  ((prog)->reganch & ROPT_TAINTED_SEEN)
  91 #define RX_MATCH_TAINTED_on(prog) ((prog)->reganch |= ROPT_TAINTED_SEEN)
  92 #define RX_MATCH_TAINTED_off(prog) ((prog)->reganch &= ~ROPT_TAINTED_SEEN)
  93 #define RX_MATCH_TAINTED_set(prog, t) ((t) \
  94                                        ? RX_MATCH_TAINTED_on(prog) \
  95                                        : RX_MATCH_TAINTED_off(prog))
  96
  97 #define RX_MATCH_COPIED(prog)           ((prog)->reganch & ROPT_COPY_DONE)
  98 #define RX_MATCH_COPIED_on(prog)        ((prog)->reganch |= ROPT_COPY_DONE)
  99 #define RX_MATCH_COPIED_off(prog)       ((prog)->reganch &= ~ROPT_COPY_DONE)
 100 #define RX_MATCH_COPIED_set(prog,t)     ((t) \
 101                                          ? RX_MATCH_COPIED_on(prog) \
 102                                          : RX_MATCH_COPIED_off(prog))
 103
 104 #define RX_MATCH_UTF8(prog)             ((prog)->reganch & ROPT_MATCH_UTF8)
 105 #define RX_MATCH_UTF8_on(prog)          ((prog)->reganch |= ROPT_MATCH_UTF8)
 106 #define RX_MATCH_UTF8_off(prog)         ((prog)->reganch &= ~ROPT_MATCH_UTF8)
 107 #define RX_MATCH_UTF8_set(prog, t)      ((t) \
 108                         ? (RX_MATCH_UTF8_on(prog), (PL_reg_match_utf8 = 1)) \
 109                         : (RX_MATCH_UTF8_off(prog), (PL_reg_match_utf8 = 0)))
 110
 111 #define REXEC_COPY_STR  0x01            /* Need to copy the string. */
 112 #define REXEC_CHECKED   0x02            /* check_substr already checked. */
 113 #define REXEC_SCREAM    0x04            /* use scream table. */
 114 #define REXEC_IGNOREPOS 0x08            /* \G matches at start. */
 115 #define REXEC_NOT_FIRST 0x10            /* This is another iteration of //g. */
 116 #define REXEC_ML        0x20            /* $* was set. */
 117
 118 #define ReREFCNT_inc(re) ((void)(re && re->refcnt++), re)
 119 #define ReREFCNT_dec(re) CALLREGFREE(aTHX_ re)
 120
 121 #define FBMcf_TAIL_DOLLAR       1
 122 #define FBMcf_TAIL_DOLLARM      2
 123 #define FBMcf_TAIL_Z            4
 124 #define FBMcf_TAIL_z            8
 125 #define FBMcf_TAIL              (FBMcf_TAIL_DOLLAR|FBMcf_TAIL_DOLLARM|FBMcf_TAIL_Z|FBMcf_TAIL_z)
 126
 127 #define FBMrf_MULTILINE 1
 128
 129 struct re_scream_pos_data_s;