dlls/vbscript/regexp.h

   1 /*
   2  * Copyright 2008 Jacek Caban for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 /*
  20  * Code in this file is based on files:
  21  * js/src/jsregexp.h
  22  * js/src/jsregexp.c
  23  * from Mozilla project, released under LGPL 2.1 or later.
  24  *
  25  * The Original Code is Mozilla Communicator client code, released
  26  * March 31, 1998.
  27  *
  28  * The Initial Developer of the Original Code is
  29  * Netscape Communications Corporation.
  30  * Portions created by the Initial Developer are Copyright (C) 1998
  31  * the Initial Developer. All Rights Reserved.
  32  */
  33
  34 #define REG_FOLD      0x01      /* fold uppercase to lowercase */
  35 #define REG_GLOB      0x02      /* global exec, creates array of matches */
  36 #define REG_MULTILINE 0x04      /* treat ^ and $ as begin and end of line */
  37 #define REG_STICKY    0x08      /* only match starting at lastIndex */
  38
  39 typedef struct RECapture {
  40     ptrdiff_t index;            /* start of contents, -1 for empty  */
  41     size_t length;              /* length of capture */
  42 } RECapture;
  43
  44 typedef struct match_state_t {
  45     const WCHAR *cp;
  46     DWORD match_len;
  47
  48     DWORD paren_count;
  49     RECapture parens[1];
  50 } match_state_t;
  51
  52 typedef BYTE jsbytecode;
  53
  54 typedef struct regexp_t {
  55     WORD                flags;         /* flags, see jsapi.h's REG_* defines */
  56     size_t              parenCount;    /* number of parenthesized submatches */
  57     size_t              classCount;    /* count [...] bitmaps */
  58     struct RECharSet    *classList;    /* list of [...] bitmaps */
  59     const WCHAR         *source;       /* locked source string, sans // */
  60     DWORD               source_len;
  61     jsbytecode          program[1];    /* regular expression bytecode */
  62 } regexp_t;
  63
  64 regexp_t* regexp_new(void*, heap_pool_t*, const WCHAR*, DWORD, WORD, BOOL) DECLSPEC_HIDDEN;
  65 void regexp_destroy(regexp_t*) DECLSPEC_HIDDEN;
  66 HRESULT regexp_execute(regexp_t*, void*, heap_pool_t*, const WCHAR*,
  67         DWORD, match_state_t*) DECLSPEC_HIDDEN;
  68 HRESULT regexp_set_flags(regexp_t**, void*, heap_pool_t*, WORD) DECLSPEC_HIDDEN;
  69
  70 static inline match_state_t* alloc_match_state(regexp_t *regexp,
  71         heap_pool_t *pool, const WCHAR *pos)
  72 {
  73     size_t size = offsetof(match_state_t, parens) + regexp->parenCount*sizeof(RECapture);
  74     match_state_t *ret;
  75
  76     ret = pool ? heap_pool_alloc(pool, size) : heap_alloc(size);
  77     if(!ret)
  78         return NULL;
  79
  80     ret->cp = pos;
  81     return ret;
  82 }