chromium/third_party/icu/source/i18n/bocsu.cpp

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*   Copyright (C) 2001-2014, International Business Machines
*   Corporation and others.  All Rights Reserved.
*******************************************************************************
*   file name:  bocsu.cpp
*   encoding:   UTF-8
*   tab size:   8 (not used)
*   indentation:4
*
*   Author: Markus W. Scherer
*
*   Modification history:
*   05/18/2001  weiv    Made into separate module
*/


#include "unicode/utypes.h"

#if !UCONFIG_NO_COLLATION

#include "unicode/bytestream.h"
#include "unicode/utf16.h"
#include "bocsu.h"

/*
 * encode one difference value -0x10ffff..+0x10ffff in 1..4 bytes,
 * preserving lexical order
 */
static uint8_t *
u_writeDiff(int32_t diff, uint8_t *p) { … }

/*
 * Encode the code points of a string as
 * a sequence of byte-encoded differences (slope detection),
 * preserving lexical order.
 *
 * Optimize the difference-taking for runs of Unicode text within
 * small scripts:
 *
 * Most small scripts are allocated within aligned 128-blocks of Unicode
 * code points. Lexical order is preserved if "prev" is always moved
 * into the middle of such a block.
 *
 * Additionally, "prev" is moved from anywhere in the Unihan
 * area into the middle of that area.
 * Note that the identical-level run in a sort key is generated from
 * NFD text - there are never Hangul characters included.
 */
U_CFUNC UChar32
u_writeIdenticalLevelRun(UChar32 prev, const char16_t *s, int32_t length, icu::ByteSink &sink) { … }

#endif /* #if !UCONFIG_NO_COLLATION */