lib/perl5/5.6.1/msys/CORE/regexp.h

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