+++ /dev/null
-/* 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.
-
------------------------------------------------------------------------------
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
- * Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- * Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- * Neither the name of the University of Cambridge nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
-LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.
------------------------------------------------------------------------------
-*/
-
-/*************************************************
-* Unicode Property Table handler *
-*************************************************/
-
-/* Internal header file defining the layout of the bits in each pair of 32-bit
-words that form a data item in the table. */
-
-typedef struct cnode {
- unsigned f0;
- unsigned f1;
-} cnode;
-
-/* Things for the f0 field */
-
-#define f0_scriptmask 0xff000000 /* Mask for script field */
-#define f0_scriptshift 24 /* Shift for script value */
-#define f0_rangeflag 0x00f00000 /* Flag for a range item */
-#define f0_charmask 0x001fffff /* Mask for code point value */
-
-/* Things for the f1 field */
-
-#define f1_typemask 0xfc000000 /* Mask for char type field */
-#define f1_typeshift 26 /* Shift for the type field */
-#define f1_rangemask 0x0000ffff /* Mask for a range offset */
-#define f1_casemask 0x0000ffff /* Mask for a case offset */
-#define f1_caseneg 0xffff8000 /* Bits for negation */
-
-/* The data consists of a vector of structures of type cnode. The two unsigned
-32-bit integers are used as follows:
-
-(f0) (1) The most significant byte holds the script number. The numbers are
- defined by the enum in ucp.h.
-
- (2) The 0x00800000 bit is set if this entry defines a range of characters.
- It is not set if this entry defines a single character
-
- (3) The 0x00600000 bits are spare.
-
- (4) The 0x001fffff bits contain the code point. No Unicode code point will
- ever be greater than 0x0010ffff, so this should be OK for ever.
-
-(f1) (1) The 0xfc000000 bits contain the character type number. The numbers are
- defined by an enum in ucp.h.
-
- (2) The 0x03ff0000 bits are spare.
-
- (3) The 0x0000ffff bits contain EITHER the unsigned offset to the top of
- range if this entry defines a range, OR the *signed* offset to the
- character's "other case" partner if this entry defines a single
- character. There is no partner if the value is zero.
-
--------------------------------------------------------------------------------
-| script (8) |.|.|.| codepoint (21) || type (6) |.|.| spare (8) | offset (16) |
--------------------------------------------------------------------------------
- | | | | |
- | | |-> spare | |-> spare
- | | |
- | |-> spare |-> spare
- |
- |-> range flag
-
-The upper/lower casing information is set only for characters that come in
-pairs. The non-one-to-one mappings in the Unicode data are ignored.
-
-When searching the data, proceed as follows:
-
-(1) Set up for a binary chop search.
-
-(2) If the top is not greater than the bottom, the character is not in the
- table. Its type must therefore be "Cn" ("Undefined").
-
-(3) Find the middle vector element.
-
-(4) Extract the code point and compare. If equal, we are done.
-
-(5) If the test character is smaller, set the top to the current point, and
- goto (2).
-
-(6) If the current entry defines a range, compute the last character by adding
- the offset, and see if the test character is within the range. If it is,
- we are done.
-
-(7) Otherwise, set the bottom to one element past the current point and goto
- (2).
-*/
-
-/* End of ucpinternal.h */
projects / apple / javascriptcore.git / blobdiff