pcre_tables.cpp

Google浏览器V8内核代码

/* This is JavaScriptCore's variant of the PCRE library. While this library
started out as a copy of PCRE, many of the features of PCRE have been
removed. This library now supports only the regular expression features
required by the JavaScript language specification, and has only the functions
needed by JavaScriptCore and the rest of WebKit.

                 Originally written by Philip Hazel
           Copyright (c) 1997-2006 University of Cambridge
    Copyright (C) 2002, 2004, 2006, 2007 Apple Inc. All rights reserved.

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*/

/* This module contains some fixed tables that are used by more than one of the
PCRE code modules. */

#include "pcre_internal.h"

/*************************************************
*           Tables for UTF-8 support             *
*************************************************/

/* These are the breakpoints for different numbers of bytes in a UTF-8
character. */

const int kjs_pcre_utf8_table1[6] =
  { 0x7f, 0x7ff, 0xffff, 0x1fffff, 0x3ffffff, 0x7fffffff};

/* These are the indicator bits and the mask for the data bits to set in the
first byte of a character, indexed by the number of additional bytes. */

const int kjs_pcre_utf8_table2[6] = { 0,    0xc0, 0xe0, 0xf0, 0xf8, 0xfc};
const int kjs_pcre_utf8_table3[6] = { 0xff, 0x1f, 0x0f, 0x07, 0x03, 0x01};

/* Table of the number of extra characters, indexed by the first character
masked with 0x3f. The highest number for a valid UTF-8 character is in fact
0x3d. */

const unsigned char kjs_pcre_utf8_table4[0x40] = {
  1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
  1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
  2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
  3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 };

#include "pcre_chartables.c"