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COPYRIGHT AND PERMISSION NOTICE (ICU 58 and later)
Copyright © 1991-2017 Unicode, Inc. All rights reserved.
Distributed under the Terms of Use in http://www.unicode.org/copyright.html
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Unicode data files and any associated documentation
(the "Data Files") or Unicode software and any associated documentation
(the "Software") to deal in the Data Files or Software
without restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, and/or sell copies of
the Data Files or Software, and to permit persons to whom the Data Files
or Software are furnished to do so, provided that either
(a) this copyright and permission notice appear with all copies
of the Data Files or Software, or
(b) this copyright and permission notice appear in associated
Documentation.
THE DATA FILES AND SOFTWARE ARE PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT OF THIRD PARTY RIGHTS.
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS
NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL
DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THE DATA FILES OR SOFTWARE.
Except as contained in this notice, the name of a copyright holder
shall not be used in advertising or otherwise to promote the sale,
use or other dealings in these Data Files or Software without prior
written authorization of the copyright holder.
---------------------
Third-Party Software Licenses
This section contains third-party software notices and/or additional
terms for licensed third-party software components included within ICU
libraries.
1. ICU License - ICU 1.8.1 to ICU 57.1
COPYRIGHT AND PERMISSION NOTICE
Copyright (c) 1995-2016 International Business Machines Corporation and others
All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, and/or sell copies of the Software, and to permit persons
to whom the Software is furnished to do so, provided that the above
copyright notice(s) and this permission notice appear in all copies of
the Software and that both the above copyright notice(s) and this
permission notice appear in supporting documentation.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY
SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER
RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
Except as contained in this notice, the name of a copyright holder
shall not be used in advertising or otherwise to promote the sale, use
or other dealings in this Software without prior written authorization
of the copyright holder.
All trademarks and registered trademarks mentioned herein are the
property of their respective owners.

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Name: ICU
URL: http://site.icu-project.org/
Version: 60
License: Unicode
License File: NOT_SHIPPED
This file has the relevant components from ICU copied to handle basic UTF8/16/32
conversions. Components are copied from umachine.h, utf.h, utf8.h, and utf16.h
into icu_utf.h, and from utf_impl.cpp into icu_utf.cc.
The main change is that U_/U8_/U16_ prefixes have been replaced with
CBU_/CBU8_/CBU16_ (for "Chrome Base") to avoid confusion with the "real" ICU
macros should ICU be in use on the system. For the same reason, the functions
and types have been put in the "base_icu" namespace.
Note that this license file is marked as NOT_SHIPPED, since a more complete
ICU license is included from //third_party/icu/README.chromium

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
*
* Copyright (C) 1999-2012, International Business Machines
* Corporation and others. All Rights Reserved.
*
******************************************************************************
* file name: utf_impl.cpp
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:4
*
* created on: 1999sep13
* created by: Markus W. Scherer
*
* This file provides implementation functions for macros in the utfXX.h
* that would otherwise be too long as macros.
*/
#include "base/third_party/icu/icu_utf.h"
namespace base_icu {
// source/common/utf_impl.cpp
static const UChar32
utf8_errorValue[6]={
// Same values as UTF8_ERROR_VALUE_1, UTF8_ERROR_VALUE_2, UTF_ERROR_VALUE,
// but without relying on the obsolete unicode/utf_old.h.
0x15, 0x9f, 0xffff,
0x10ffff
};
static UChar32
errorValue(int32_t count, int8_t strict) {
if(strict>=0) {
return utf8_errorValue[count];
} else if(strict==-3) {
return 0xfffd;
} else {
return CBU_SENTINEL;
}
}
/*
* Handle the non-inline part of the U8_NEXT() and U8_NEXT_FFFD() macros
* and their obsolete sibling UTF8_NEXT_CHAR_SAFE().
*
* U8_NEXT() supports NUL-terminated strings indicated via length<0.
*
* The "strict" parameter controls the error behavior:
* <0 "Safe" behavior of U8_NEXT():
* -1: All illegal byte sequences yield U_SENTINEL=-1.
* -2: Same as -1, except for lenient treatment of surrogate code points as legal.
* Some implementations use this for roundtripping of
* Unicode 16-bit strings that are not well-formed UTF-16, that is, they
* contain unpaired surrogates.
* -3: All illegal byte sequences yield U+FFFD.
* 0 Obsolete "safe" behavior of UTF8_NEXT_CHAR_SAFE(..., FALSE):
* All illegal byte sequences yield a positive code point such that this
* result code point would be encoded with the same number of bytes as
* the illegal sequence.
* >0 Obsolete "strict" behavior of UTF8_NEXT_CHAR_SAFE(..., TRUE):
* Same as the obsolete "safe" behavior, but non-characters are also treated
* like illegal sequences.
*
* Note that a UBool is the same as an int8_t.
*/
UChar32
utf8_nextCharSafeBody(const uint8_t *s, int32_t *pi, int32_t length, UChar32 c, UBool strict) {
// *pi is one after byte c.
int32_t i=*pi;
// length can be negative for NUL-terminated strings: Read and validate one byte at a time.
if(i==length || c>0xf4) {
// end of string, or not a lead byte
} else if(c>=0xf0) {
// Test for 4-byte sequences first because
// U8_NEXT() handles shorter valid sequences inline.
uint8_t t1=s[i], t2, t3;
c&=7;
if(CBU8_IS_VALID_LEAD4_AND_T1(c, t1) &&
++i!=length && (t2=s[i]-0x80)<=0x3f &&
++i!=length && (t3=s[i]-0x80)<=0x3f) {
++i;
c=(c<<18)|((t1&0x3f)<<12)|(t2<<6)|t3;
// strict: forbid non-characters like U+fffe
if(strict<=0 || !CBU_IS_UNICODE_NONCHAR(c)) {
*pi=i;
return c;
}
}
} else if(c>=0xe0) {
c&=0xf;
if(strict!=-2) {
uint8_t t1=s[i], t2;
if(CBU8_IS_VALID_LEAD3_AND_T1(c, t1) &&
++i!=length && (t2=s[i]-0x80)<=0x3f) {
++i;
c=(c<<12)|((t1&0x3f)<<6)|t2;
// strict: forbid non-characters like U+fffe
if(strict<=0 || !CBU_IS_UNICODE_NONCHAR(c)) {
*pi=i;
return c;
}
}
} else {
// strict=-2 -> lenient: allow surrogates
uint8_t t1=s[i]-0x80, t2;
if(t1<=0x3f && (c>0 || t1>=0x20) &&
++i!=length && (t2=s[i]-0x80)<=0x3f) {
*pi=i+1;
return (c<<12)|(t1<<6)|t2;
}
}
} else if(c>=0xc2) {
uint8_t t1=s[i]-0x80;
if(t1<=0x3f) {
*pi=i+1;
return ((c-0xc0)<<6)|t1;
}
} // else 0x80<=c<0xc2 is not a lead byte
/* error handling */
c=errorValue(i-*pi, strict);
*pi=i;
return c;
}
} // namespace base_icu

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
*
* Copyright (C) 1999-2015, International Business Machines
* Corporation and others. All Rights Reserved.
*
******************************************************************************
*/
#ifndef BASE_THIRD_PARTY_ICU_ICU_UTF_H_
#define BASE_THIRD_PARTY_ICU_ICU_UTF_H_
#include <stdint.h>
namespace base_icu {
// source/common/unicode/umachine.h
/** The ICU boolean type @stable ICU 2.0 */
typedef int8_t UBool;
/**
* Define UChar32 as a type for single Unicode code points.
* UChar32 is a signed 32-bit integer (same as int32_t).
*
* The Unicode code point range is 0..0x10ffff.
* All other values (negative or >=0x110000) are illegal as Unicode code points.
* They may be used as sentinel values to indicate "done", "error"
* or similar non-code point conditions.
*
* Before ICU 2.4 (Jitterbug 2146), UChar32 was defined
* to be wchar_t if that is 32 bits wide (wchar_t may be signed or unsigned)
* or else to be uint32_t.
* That is, the definition of UChar32 was platform-dependent.
*
* @see U_SENTINEL
* @stable ICU 2.4
*/
typedef int32_t UChar32;
/**
* This value is intended for sentinel values for APIs that
* (take or) return single code points (UChar32).
* It is outside of the Unicode code point range 0..0x10ffff.
*
* For example, a "done" or "error" value in a new API
* could be indicated with U_SENTINEL.
*
* ICU APIs designed before ICU 2.4 usually define service-specific "done"
* values, mostly 0xffff.
* Those may need to be distinguished from
* actual U+ffff text contents by calling functions like
* CharacterIterator::hasNext() or UnicodeString::length().
*
* @return -1
* @see UChar32
* @stable ICU 2.4
*/
#define CBU_SENTINEL (-1)
// source/common/unicode/utf.h
/**
* Is this code point a Unicode noncharacter?
* @param c 32-bit code point
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU_IS_UNICODE_NONCHAR(c) \
((c)>=0xfdd0 && \
((c)<=0xfdef || ((c)&0xfffe)==0xfffe) && (c)<=0x10ffff)
/**
* Is c a Unicode code point value (0..U+10ffff)
* that can be assigned a character?
*
* Code points that are not characters include:
* - single surrogate code points (U+d800..U+dfff, 2048 code points)
* - the last two code points on each plane (U+__fffe and U+__ffff, 34 code points)
* - U+fdd0..U+fdef (new with Unicode 3.1, 32 code points)
* - the highest Unicode code point value is U+10ffff
*
* This means that all code points below U+d800 are character code points,
* and that boundary is tested first for performance.
*
* @param c 32-bit code point
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU_IS_UNICODE_CHAR(c) \
((uint32_t)(c)<0xd800 || \
(0xdfff<(c) && (c)<=0x10ffff && !CBU_IS_UNICODE_NONCHAR(c)))
/**
* Is this code point a surrogate (U+d800..U+dfff)?
* @param c 32-bit code point
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU_IS_SURROGATE(c) (((c)&0xfffff800)==0xd800)
/**
* Assuming c is a surrogate code point (U_IS_SURROGATE(c)),
* is it a lead surrogate?
* @param c 32-bit code point
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU_IS_SURROGATE_LEAD(c) (((c)&0x400)==0)
// source/common/unicode/utf8.h
/**
* Internal bit vector for 3-byte UTF-8 validity check, for use in U8_IS_VALID_LEAD3_AND_T1.
* Each bit indicates whether one lead byte + first trail byte pair starts a valid sequence.
* Lead byte E0..EF bits 3..0 are used as byte index,
* first trail byte bits 7..5 are used as bit index into that byte.
* @see U8_IS_VALID_LEAD3_AND_T1
* @internal
*/
#define CBU8_LEAD3_T1_BITS "\x20\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x10\x30\x30"
/**
* Internal 3-byte UTF-8 validity check.
* Non-zero if lead byte E0..EF and first trail byte 00..FF start a valid sequence.
* @internal
*/
#define CBU8_IS_VALID_LEAD3_AND_T1(lead, t1) (CBU8_LEAD3_T1_BITS[(lead)&0xf]&(1<<((uint8_t)(t1)>>5)))
/**
* Internal bit vector for 4-byte UTF-8 validity check, for use in U8_IS_VALID_LEAD4_AND_T1.
* Each bit indicates whether one lead byte + first trail byte pair starts a valid sequence.
* First trail byte bits 7..4 are used as byte index,
* lead byte F0..F4 bits 2..0 are used as bit index into that byte.
* @see U8_IS_VALID_LEAD4_AND_T1
* @internal
*/
#define CBU8_LEAD4_T1_BITS "\x00\x00\x00\x00\x00\x00\x00\x00\x1E\x0F\x0F\x0F\x00\x00\x00\x00"
/**
* Internal 4-byte UTF-8 validity check.
* Non-zero if lead byte F0..F4 and first trail byte 00..FF start a valid sequence.
* @internal
*/
#define CBU8_IS_VALID_LEAD4_AND_T1(lead, t1) (CBU8_LEAD4_T1_BITS[(uint8_t)(t1)>>4]&(1<<((lead)&7)))
/**
* Function for handling "next code point" with error-checking.
*
* This is internal since it is not meant to be called directly by external clie
nts;
* however it is U_STABLE (not U_INTERNAL) since it is called by public macros i
n this
* file and thus must remain stable, and should not be hidden when other interna
l
* functions are hidden (otherwise public macros would fail to compile).
* @internal
*/
UChar32
utf8_nextCharSafeBody(const uint8_t *s, int32_t *pi, int32_t length, ::base_icu::UChar32 c, ::base_icu::UBool strict);
/**
* Does this code unit (byte) encode a code point by itself (US-ASCII 0..0x7f)?
* @param c 8-bit code unit (byte)
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU8_IS_SINGLE(c) (((c)&0x80)==0)
/**
* Is this code unit (byte) a UTF-8 lead byte? (0xC2..0xF4)
* @param c 8-bit code unit (byte)
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU8_IS_LEAD(c) ((uint8_t)((c)-0xc2)<=0x32)
/**
* Is this code unit (byte) a UTF-8 trail byte? (0x80..0xBF)
* @param c 8-bit code unit (byte)
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU8_IS_TRAIL(c) ((int8_t)(c)<-0x40)
/**
* How many code units (bytes) are used for the UTF-8 encoding
* of this Unicode code point?
* @param c 32-bit code point
* @return 1..4, or 0 if c is a surrogate or not a Unicode code point
* @stable ICU 2.4
*/
#define CBU8_LENGTH(c) \
((uint32_t)(c)<=0x7f ? 1 : \
((uint32_t)(c)<=0x7ff ? 2 : \
((uint32_t)(c)<=0xd7ff ? 3 : \
((uint32_t)(c)<=0xdfff || (uint32_t)(c)>0x10ffff ? 0 : \
((uint32_t)(c)<=0xffff ? 3 : 4)\
) \
) \
) \
)
/**
* The maximum number of UTF-8 code units (bytes) per Unicode code point (U+0000..U+10ffff).
* @return 4
* @stable ICU 2.4
*/
#define CBU8_MAX_LENGTH 4
/**
* Get a code point from a string at a code point boundary offset,
* and advance the offset to the next code point boundary.
* (Post-incrementing forward iteration.)
* "Safe" macro, checks for illegal sequences and for string boundaries.
*
* The length can be negative for a NUL-terminated string.
*
* The offset may point to the lead byte of a multi-byte sequence,
* in which case the macro will read the whole sequence.
* If the offset points to a trail byte or an illegal UTF-8 sequence, then
* c is set to a negative value.
*
* @param s const uint8_t * string
* @param i int32_t string offset, must be i<length
* @param length int32_t string length
* @param c output UChar32 variable, set to <0 in case of an error
* @see U8_NEXT_UNSAFE
* @stable ICU 2.4
*/
#define CBU8_NEXT(s, i, length, c) { \
(c)=(uint8_t)(s)[(i)++]; \
if(!CBU8_IS_SINGLE(c)) { \
uint8_t __t1, __t2; \
if( /* handle U+0800..U+FFFF inline */ \
(0xe0<=(c) && (c)<0xf0) && \
(((i)+1)<(length) || (length)<0) && \
CBU8_IS_VALID_LEAD3_AND_T1((c), __t1=(s)[i]) && \
(__t2=(s)[(i)+1]-0x80)<=0x3f) { \
(c)=(((c)&0xf)<<12)|((__t1&0x3f)<<6)|__t2; \
(i)+=2; \
} else if( /* handle U+0080..U+07FF inline */ \
((c)<0xe0 && (c)>=0xc2) && \
((i)!=(length)) && \
(__t1=(s)[i]-0x80)<=0x3f) { \
(c)=(((c)&0x1f)<<6)|__t1; \
++(i); \
} else { \
/* function call for "complicated" and error cases */ \
(c)=::base_icu::utf8_nextCharSafeBody((const uint8_t *)s, &(i), (length), c, -1); \
} \
} \
}
/**
* Append a code point to a string, overwriting 1 to 4 bytes.
* The offset points to the current end of the string contents
* and is advanced (post-increment).
* "Unsafe" macro, assumes a valid code point and sufficient space in the string.
* Otherwise, the result is undefined.
*
* @param s const uint8_t * string buffer
* @param i string offset
* @param c code point to append
* @see U8_APPEND
* @stable ICU 2.4
*/
#define CBU8_APPEND_UNSAFE(s, i, c) { \
if((uint32_t)(c)<=0x7f) { \
(s)[(i)++]=(uint8_t)(c); \
} else { \
if((uint32_t)(c)<=0x7ff) { \
(s)[(i)++]=(uint8_t)(((c)>>6)|0xc0); \
} else { \
if((uint32_t)(c)<=0xffff) { \
(s)[(i)++]=(uint8_t)(((c)>>12)|0xe0); \
} else { \
(s)[(i)++]=(uint8_t)(((c)>>18)|0xf0); \
(s)[(i)++]=(uint8_t)((((c)>>12)&0x3f)|0x80); \
} \
(s)[(i)++]=(uint8_t)((((c)>>6)&0x3f)|0x80); \
} \
(s)[(i)++]=(uint8_t)(((c)&0x3f)|0x80); \
} \
}
// source/common/unicode/utf16.h
/**
* Does this code unit alone encode a code point (BMP, not a surrogate)?
* @param c 16-bit code unit
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU16_IS_SINGLE(c) !CBU_IS_SURROGATE(c)
/**
* Is this code unit a lead surrogate (U+d800..U+dbff)?
* @param c 16-bit code unit
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU16_IS_LEAD(c) (((c)&0xfffffc00)==0xd800)
/**
* Is this code unit a trail surrogate (U+dc00..U+dfff)?
* @param c 16-bit code unit
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU16_IS_TRAIL(c) (((c)&0xfffffc00)==0xdc00)
/**
* Is this code unit a surrogate (U+d800..U+dfff)?
* @param c 16-bit code unit
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU16_IS_SURROGATE(c) CBU_IS_SURROGATE(c)
/**
* Assuming c is a surrogate code point (U16_IS_SURROGATE(c)),
* is it a lead surrogate?
* @param c 16-bit code unit
* @return TRUE or FALSE
* @stable ICU 2.4
*/
#define CBU16_IS_SURROGATE_LEAD(c) (((c)&0x400)==0)
/**
* Helper constant for U16_GET_SUPPLEMENTARY.
* @internal
*/
#define CBU16_SURROGATE_OFFSET ((0xd800<<10UL)+0xdc00-0x10000)
/**
* Get a supplementary code point value (U+10000..U+10ffff)
* from its lead and trail surrogates.
* The result is undefined if the input values are not
* lead and trail surrogates.
*
* @param lead lead surrogate (U+d800..U+dbff)
* @param trail trail surrogate (U+dc00..U+dfff)
* @return supplementary code point (U+10000..U+10ffff)
* @stable ICU 2.4
*/
#define CBU16_GET_SUPPLEMENTARY(lead, trail) \
(((::base_icu::UChar32)(lead)<<10UL)+(::base_icu::UChar32)(trail)-CBU16_SURROGATE_OFFSET)
/**
* Get the lead surrogate (0xd800..0xdbff) for a
* supplementary code point (0x10000..0x10ffff).
* @param supplementary 32-bit code point (U+10000..U+10ffff)
* @return lead surrogate (U+d800..U+dbff) for supplementary
* @stable ICU 2.4
*/
#define CBU16_LEAD(supplementary) (::base_icu::UChar)(((supplementary)>>10)+0xd7c0)
/**
* Get the trail surrogate (0xdc00..0xdfff) for a
* supplementary code point (0x10000..0x10ffff).
* @param supplementary 32-bit code point (U+10000..U+10ffff)
* @return trail surrogate (U+dc00..U+dfff) for supplementary
* @stable ICU 2.4
*/
#define CBU16_TRAIL(supplementary) (::base_icu::UChar)(((supplementary)&0x3ff)|0xdc00)
/**
* How many 16-bit code units are used to encode this Unicode code point? (1 or 2)
* The result is not defined if c is not a Unicode code point (U+0000..U+10ffff).
* @param c 32-bit code point
* @return 1 or 2
* @stable ICU 2.4
*/
#define CBU16_LENGTH(c) ((uint32_t)(c)<=0xffff ? 1 : 2)
/**
* The maximum number of 16-bit code units per Unicode code point (U+0000..U+10ffff).
* @return 2
* @stable ICU 2.4
*/
#define CBU16_MAX_LENGTH 2
/**
* Get a code point from a string at a code point boundary offset,
* and advance the offset to the next code point boundary.
* (Post-incrementing forward iteration.)
* "Safe" macro, handles unpaired surrogates and checks for string boundaries.
*
* The length can be negative for a NUL-terminated string.
*
* The offset may point to the lead surrogate unit
* for a supplementary code point, in which case the macro will read
* the following trail surrogate as well.
* If the offset points to a trail surrogate or
* to a single, unpaired lead surrogate, then c is set to that unpaired surrogate.
*
* @param s const UChar * string
* @param i string offset, must be i<length
* @param length string length
* @param c output UChar32 variable
* @see U16_NEXT_UNSAFE
* @stable ICU 2.4
*/
#define CBU16_NEXT(s, i, length, c) { \
(c)=(s)[(i)++]; \
if(CBU16_IS_LEAD(c)) { \
uint16_t __c2; \
if((i)!=(length) && CBU16_IS_TRAIL(__c2=(s)[(i)])) { \
++(i); \
(c)=CBU16_GET_SUPPLEMENTARY((c), __c2); \
} \
} \
}
/**
* Append a code point to a string, overwriting 1 or 2 code units.
* The offset points to the current end of the string contents
* and is advanced (post-increment).
* "Unsafe" macro, assumes a valid code point and sufficient space in the string.
* Otherwise, the result is undefined.
*
* @param s const UChar * string buffer
* @param i string offset
* @param c code point to append
* @see U16_APPEND
* @stable ICU 2.4
*/
#define CBU16_APPEND_UNSAFE(s, i, c) { \
if((uint32_t)(c)<=0xffff) { \
(s)[(i)++]=(uint16_t)(c); \
} else { \
(s)[(i)++]=(uint16_t)(((c)>>10)+0xd7c0); \
(s)[(i)++]=(uint16_t)(((c)&0x3ff)|0xdc00); \
} \
}
} // namesapce base_icu
#endif // BASE_THIRD_PARTY_ICU_ICU_UTF_H_