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scuffed-code/icu4c/source/common/uchar.c
George Rhoten 2a43cb638e ICU-900 Fixed some lint warnings. 
X-SVN-Rev: 6573
2001-11-02 02:43:22 +00:00

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/*
********************************************************************************
* Copyright (C) 1996-2001, International Business Machines
* Corporation and others. All Rights Reserved.
********************************************************************************
*
* File UCHAR.C
*
* Modification History:
*
* Date Name Description
* 04/02/97 aliu Creation.
* 4/15/99 Madhu Updated all the function definitions for C Implementation
* 5/20/99 Madhu Added the function u_getVersion()
* 8/19/1999 srl Upgraded scripts to Unicode3.0
* 11/11/1999 weiv added u_isalnum(), cleaned comments
* 01/11/2000 helena Renamed u_getVersion to u_getUnicodeVersion.
* 06/20/2000 helena OS/400 port changes; mostly typecast.
******************************************************************************
*/
#include "unicode/utypes.h"
#include "unicode/uchar.h"
#include "unicode/udata.h"
#include "unicode/uloc.h"
#include "umutex.h"
#include "cmemory.h"
#include "ustr_imp.h"
#include "ucln_cmn.h"
/*
* Since genprops overrides the general category for some control codes,
* we need to hardcode ISO 8 controls for u_iscntrl(), u_isprint(), etc.
*/
#define IS_ISO_8_CONTROL(c) ((uint32_t)(c)<0x20 || (uint32_t)((c)-0x7f)<=0x20)
/* dynamically loaded Unicode character properties -------------------------- */
/* fallback properties for the ASCII range if the data cannot be loaded */
/* these are printed by genprops in verbose mode */
static const uint32_t staticProps32Table[]={
/* 0x00 */ 0x48f,
/* 0x01 */ 0x48f,
/* 0x02 */ 0x48f,
/* 0x03 */ 0x48f,
/* 0x04 */ 0x48f,
/* 0x05 */ 0x48f,
/* 0x06 */ 0x48f,
/* 0x07 */ 0x48f,
/* 0x08 */ 0x48f,
/* 0x09 */ 0x20c,
/* 0x0a */ 0x1ce,
/* 0x0b */ 0x20c,
/* 0x0c */ 0x24d,
/* 0x0d */ 0x1ce,
/* 0x0e */ 0x48f,
/* 0x0f */ 0x48f,
/* 0x10 */ 0x48f,
/* 0x11 */ 0x48f,
/* 0x12 */ 0x48f,
/* 0x13 */ 0x48f,
/* 0x14 */ 0x48f,
/* 0x15 */ 0x48f,
/* 0x16 */ 0x48f,
/* 0x17 */ 0x48f,
/* 0x18 */ 0x48f,
/* 0x19 */ 0x48f,
/* 0x1a */ 0x48f,
/* 0x1b */ 0x48f,
/* 0x1c */ 0x1ce,
/* 0x1d */ 0x1ce,
/* 0x1e */ 0x1ce,
/* 0x1f */ 0x20c,
/* 0x20 */ 0x24c,
/* 0x21 */ 0x297,
/* 0x22 */ 0x297,
/* 0x23 */ 0x117,
/* 0x24 */ 0x119,
/* 0x25 */ 0x117,
/* 0x26 */ 0x297,
/* 0x27 */ 0x297,
/* 0x28 */ 0x100a94,
/* 0x29 */ 0xfff00a95,
/* 0x2a */ 0x297,
/* 0x2b */ 0x118,
/* 0x2c */ 0x197,
/* 0x2d */ 0x113,
/* 0x2e */ 0x197,
/* 0x2f */ 0xd7,
/* 0x30 */ 0x89,
/* 0x31 */ 0x100089,
/* 0x32 */ 0x200089,
/* 0x33 */ 0x300089,
/* 0x34 */ 0x400089,
/* 0x35 */ 0x500089,
/* 0x36 */ 0x600089,
/* 0x37 */ 0x700089,
/* 0x38 */ 0x800089,
/* 0x39 */ 0x900089,
/* 0x3a */ 0x197,
/* 0x3b */ 0x297,
/* 0x3c */ 0x200a98,
/* 0x3d */ 0x298,
/* 0x3e */ 0xffe00a98,
/* 0x3f */ 0x297,
/* 0x40 */ 0x297,
/* 0x41 */ 0x2000001,
/* 0x42 */ 0x2000001,
/* 0x43 */ 0x2000001,
/* 0x44 */ 0x2000001,
/* 0x45 */ 0x2000001,
/* 0x46 */ 0x2000001,
/* 0x47 */ 0x2000001,
/* 0x48 */ 0x2000001,
/* 0x49 */ 0x2000001,
/* 0x4a */ 0x2000001,
/* 0x4b */ 0x2000001,
/* 0x4c */ 0x2000001,
/* 0x4d */ 0x2000001,
/* 0x4e */ 0x2000001,
/* 0x4f */ 0x2000001,
/* 0x50 */ 0x2000001,
/* 0x51 */ 0x2000001,
/* 0x52 */ 0x2000001,
/* 0x53 */ 0x2000001,
/* 0x54 */ 0x2000001,
/* 0x55 */ 0x2000001,
/* 0x56 */ 0x2000001,
/* 0x57 */ 0x2000001,
/* 0x58 */ 0x2000001,
/* 0x59 */ 0x2000001,
/* 0x5a */ 0x2000001,
/* 0x5b */ 0x200a94,
/* 0x5c */ 0x297,
/* 0x5d */ 0xffe00a95,
/* 0x5e */ 0x29a,
/* 0x5f */ 0x296,
/* 0x60 */ 0x29a,
/* 0x61 */ 0x2000002,
/* 0x62 */ 0x2000002,
/* 0x63 */ 0x2000002,
/* 0x64 */ 0x2000002,
/* 0x65 */ 0x2000002,
/* 0x66 */ 0x2000002,
/* 0x67 */ 0x2000002,
/* 0x68 */ 0x2000002,
/* 0x69 */ 0x2000002,
/* 0x6a */ 0x2000002,
/* 0x6b */ 0x2000002,
/* 0x6c */ 0x2000002,
/* 0x6d */ 0x2000002,
/* 0x6e */ 0x2000002,
/* 0x6f */ 0x2000002,
/* 0x70 */ 0x2000002,
/* 0x71 */ 0x2000002,
/* 0x72 */ 0x2000002,
/* 0x73 */ 0x2000002,
/* 0x74 */ 0x2000002,
/* 0x75 */ 0x2000002,
/* 0x76 */ 0x2000002,
/* 0x77 */ 0x2000002,
/* 0x78 */ 0x2000002,
/* 0x79 */ 0x2000002,
/* 0x7a */ 0x2000002,
/* 0x7b */ 0x200a94,
/* 0x7c */ 0x298,
/* 0x7d */ 0xffe00a95,
/* 0x7e */ 0x298,
/* 0x7f */ 0x48f,
/* 0x80 */ 0x48f,
/* 0x81 */ 0x48f,
/* 0x82 */ 0x48f,
/* 0x83 */ 0x48f,
/* 0x84 */ 0x48f,
/* 0x85 */ 0x1ce,
/* 0x86 */ 0x48f,
/* 0x87 */ 0x48f,
/* 0x88 */ 0x48f,
/* 0x89 */ 0x48f,
/* 0x8a */ 0x48f,
/* 0x8b */ 0x48f,
/* 0x8c */ 0x48f,
/* 0x8d */ 0x48f,
/* 0x8e */ 0x48f,
/* 0x8f */ 0x48f,
/* 0x90 */ 0x48f,
/* 0x91 */ 0x48f,
/* 0x92 */ 0x48f,
/* 0x93 */ 0x48f,
/* 0x94 */ 0x48f,
/* 0x95 */ 0x48f,
/* 0x96 */ 0x48f,
/* 0x97 */ 0x48f,
/* 0x98 */ 0x48f,
/* 0x99 */ 0x48f,
/* 0x9a */ 0x48f,
/* 0x9b */ 0x48f,
/* 0x9c */ 0x48f,
/* 0x9d */ 0x48f,
/* 0x9e */ 0x48f,
/* 0x9f */ 0x48f
};
/*
* loaded uprops.dat -
* for a description of the file format, see icu/source/tools/genprops/store.c
*/
#define DATA_NAME "uprops"
#define DATA_TYPE "dat"
static UDataMemory *propsData=NULL;
static uint8_t formatVersion[4]={ 0, 0, 0, 0 };
static UVersionInfo dataVersion={ 3, 0, 0, 0 };
static const uint16_t *propsTable=NULL;
#define props32Table ((uint32_t *)propsTable)
static const UChar *ucharsTable=NULL;
static int8_t havePropsData=0;
/* index values loaded from uprops.dat */
static uint16_t indexes[8];
enum {
INDEX_STAGE_2_BITS,
INDEX_STAGE_3_BITS,
INDEX_EXCEPTIONS,
INDEX_STAGE_3_INDEX,
INDEX_PROPS,
INDEX_UCHARS
};
#ifdef UCHAR_VARIABLE_TRIE_BITS
/* access values calculated from indexes */
static uint16_t stage23Bits, stage2Mask, stage3Mask;
# define stage3Bits indexes[INDEX_STAGE_3_BITS]
#else
/* We are now hardcoding the bit distribution for the trie table access. */
# define stage23Bits 10
# define stage2Mask 0x3f
# define stage3Mask 0xf
# define stage3Bits 4
#endif
static UBool
isAcceptable(void *context,
const char *type, const char *name,
const UDataInfo *pInfo) {
if(
pInfo->size>=20 &&
pInfo->isBigEndian==U_IS_BIG_ENDIAN &&
pInfo->charsetFamily==U_CHARSET_FAMILY &&
pInfo->dataFormat[0]==0x55 && /* dataFormat="UPro" */
pInfo->dataFormat[1]==0x50 &&
pInfo->dataFormat[2]==0x72 &&
pInfo->dataFormat[3]==0x6f &&
pInfo->formatVersion[0]==1
) {
uprv_memcpy(formatVersion, pInfo->formatVersion, 4);
uprv_memcpy(dataVersion, pInfo->dataVersion, 4);
return TRUE;
} else {
return FALSE;
}
}
UBool
uchar_cleanup()
{
if (propsData) {
udata_close(propsData);
propsData = NULL;
}
propsTable = NULL;
ucharsTable = NULL;
havePropsData = FALSE;
return TRUE;
}
static int8_t
loadPropsData() {
/* load Unicode character properties data from file if necessary */
if(havePropsData==0) {
UErrorCode errorCode=U_ZERO_ERROR;
UDataMemory *data;
const uint16_t *p=NULL;
/* open the data outside the mutex block */
data=udata_openChoice(NULL, DATA_TYPE, DATA_NAME, isAcceptable, NULL, &errorCode);
if(U_FAILURE(errorCode)) {
return havePropsData=-1;
}
p=(const uint16_t *)udata_getMemory(data);
#ifndef UCHAR_VARIABLE_TRIE_BITS
/*
* We are now hardcoding the bit distribution for the trie table access.
* Check that the file is stored accordingly.
*/
if(p[INDEX_STAGE_2_BITS]!=6 || p[INDEX_STAGE_3_BITS]!=4) {
udata_close(data);
errorCode=U_INVALID_FORMAT_ERROR;
return havePropsData=-1;
}
#endif
/* in the mutex block, set the data for this process */
umtx_lock(NULL);
if(propsData==NULL) {
propsData=data;
data=NULL;
propsTable=p;
p=NULL;
}
umtx_unlock(NULL);
/* initialize some variables */
uprv_memcpy(indexes, propsTable, 16);
#ifdef UCHAR_VARIABLE_TRIE_BITS
stage23Bits=(uint16_t)(indexes[INDEX_STAGE_2_BITS]+indexes[INDEX_STAGE_3_BITS]);
stage2Mask=(uint16_t)((1<<indexes[INDEX_STAGE_2_BITS])-1);
stage3Mask=(uint16_t)((1<<indexes[INDEX_STAGE_3_BITS])-1);
#endif
ucharsTable=(const UChar *)(props32Table+indexes[INDEX_UCHARS]);
havePropsData=1;
/* if a different thread set it first, then close the extra data */
if(data!=NULL) {
udata_close(data); /* NULL if it was set correctly */
}
}
return havePropsData;
}
/* constants and macros for access to the data */
enum {
EXC_UPPERCASE,
EXC_LOWERCASE,
EXC_TITLECASE,
EXC_DIGIT_VALUE,
EXC_NUMERIC_VALUE,
EXC_DENOMINATOR_VALUE,
EXC_MIRROR_MAPPING,
EXC_SPECIAL_CASING,
EXC_CASE_FOLDING
};
enum {
EXCEPTION_SHIFT=5,
BIDI_SHIFT,
MIRROR_SHIFT=BIDI_SHIFT+5,
VALUE_SHIFT=20,
VALUE_BITS=32-VALUE_SHIFT
};
/* getting a uint32_t properties word from the data */
#define HAVE_DATA (havePropsData>0 || (havePropsData==0 && loadPropsData()>0))
#define VALIDATE(c) (((uint32_t)(c))<=0x10ffff && HAVE_DATA)
#define GET_PROPS_UNSAFE(c) \
props32Table[ \
propsTable[ \
propsTable[ \
propsTable[8+((c)>>stage23Bits)]+ \
(((c)>>stage3Bits)&stage2Mask)]+ \
((c)&stage3Mask) \
] \
]
#define GET_PROPS(c) \
(((uint32_t)(c))<=0x10ffff ? \
HAVE_DATA ? \
GET_PROPS_UNSAFE(c) \
: (c)<=0x9f ? \
staticProps32Table[c] \
: 0 \
: 0)
#define PROPS_VALUE_IS_EXCEPTION(props) ((props)&(1UL<<EXCEPTION_SHIFT))
#define GET_CATEGORY(props) ((props)&0x1f)
#define GET_UNSIGNED_VALUE(props) ((props)>>VALUE_SHIFT)
#define GET_SIGNED_VALUE(props) ((int32_t)(props)>>VALUE_SHIFT)
#define GET_EXCEPTIONS(props) (props32Table+indexes[INDEX_EXCEPTIONS]+GET_UNSIGNED_VALUE(props))
/* finding an exception value */
#define HAVE_EXCEPTION_VALUE(flags, index) ((flags)&(1UL<<(index)))
/* number of bits in an 8-bit integer value */
#define EXC_GROUP 8
static const uint8_t flagsOffset[256]={
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
};
#define ADD_EXCEPTION_OFFSET(flags, index, offset) { \
if((index)>=EXC_GROUP) { \
(offset)+=flagsOffset[(flags)&((1<<EXC_GROUP)-1)]; \
(flags)>>=EXC_GROUP; \
(index)-=EXC_GROUP; \
} \
(offset)+=flagsOffset[(flags)&((1<<(index))-1)]; \
}
U_CFUNC UBool
uprv_haveProperties() {
return (UBool)HAVE_DATA;
}
/* API functions ------------------------------------------------------------ */
/* Gets the Unicode character's general category.*/
U_CAPI int8_t U_EXPORT2
u_charType(UChar32 c) {
return (int8_t)GET_CATEGORY(GET_PROPS(c));
}
/* Checks if ch is a lower case letter.*/
U_CAPI UBool U_EXPORT2
u_islower(UChar32 c) {
return (UBool)(GET_CATEGORY(GET_PROPS(c))==U_LOWERCASE_LETTER);
}
/* Checks if ch is an upper case letter.*/
U_CAPI UBool U_EXPORT2
u_isupper(UChar32 c) {
return (UBool)(GET_CATEGORY(GET_PROPS(c))==U_UPPERCASE_LETTER);
}
/* Checks if ch is a title case letter; usually upper case letters.*/
U_CAPI UBool U_EXPORT2
u_istitle(UChar32 c) {
return (UBool)(GET_CATEGORY(GET_PROPS(c))==U_TITLECASE_LETTER);
}
/* Checks if ch is a decimal digit. */
U_CAPI UBool U_EXPORT2
u_isdigit(UChar32 c) {
return (UBool)(((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_DECIMAL_DIGIT_NUMBER|1UL<<U_OTHER_NUMBER|1UL<<U_LETTER_NUMBER)
)!=0);
}
/* Checks if the Unicode character is a letter.*/
U_CAPI UBool U_EXPORT2
u_isalpha(UChar32 c) {
return (UBool)(((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_UPPERCASE_LETTER|1UL<<U_LOWERCASE_LETTER|1UL<<U_TITLECASE_LETTER|1UL<<U_MODIFIER_LETTER|1UL<<U_OTHER_LETTER)
)!=0);
}
/* Checks if ch is a letter or a decimal digit */
U_CAPI UBool U_EXPORT2
u_isalnum(UChar32 c) {
return (UBool)(((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_DECIMAL_DIGIT_NUMBER|1UL<<U_OTHER_NUMBER|1UL<<U_LETTER_NUMBER|
1UL<<U_UPPERCASE_LETTER|1UL<<U_LOWERCASE_LETTER|1UL<<U_TITLECASE_LETTER|1UL<<U_MODIFIER_LETTER|1UL<<U_OTHER_LETTER)
)!=0);
}
/* Checks if ch is a unicode character with assigned character type.*/
U_CAPI UBool U_EXPORT2
u_isdefined(UChar32 c) {
return (UBool)(GET_PROPS(c)!=0);
}
/* Checks if the Unicode character is a base form character that can take a diacritic.*/
U_CAPI UBool U_EXPORT2
u_isbase(UChar32 c) {
return (UBool)(((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_DECIMAL_DIGIT_NUMBER|1UL<<U_OTHER_NUMBER|1UL<<U_LETTER_NUMBER|
1UL<<U_UPPERCASE_LETTER|1UL<<U_LOWERCASE_LETTER|1UL<<U_TITLECASE_LETTER|1UL<<U_MODIFIER_LETTER|1UL<<U_OTHER_LETTER|
1UL<<U_NON_SPACING_MARK|1UL<<U_ENCLOSING_MARK|1UL<<U_COMBINING_SPACING_MARK)
)!=0);
}
/* Checks if the Unicode character is a control character.*/
U_CAPI UBool U_EXPORT2
u_iscntrl(UChar32 c) {
return (UBool)(
IS_ISO_8_CONTROL(c) ||
((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_CONTROL_CHAR|1UL<<U_FORMAT_CHAR|1UL<<U_LINE_SEPARATOR|1UL<<U_PARAGRAPH_SEPARATOR)
)!=0);
}
/* Checks if the Unicode character is a space character.*/
UBool
u_isspace(UChar32 c) {
return (UBool)(((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_SPACE_SEPARATOR|1UL<<U_LINE_SEPARATOR|1UL<<U_PARAGRAPH_SEPARATOR)
)!=0);
}
/* Checks if the Unicode character is a whitespace character.*/
U_CAPI UBool U_EXPORT2
u_isWhitespace(UChar32 c) {
return (UBool)(((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_SPACE_SEPARATOR|1UL<<U_LINE_SEPARATOR|1UL<<U_PARAGRAPH_SEPARATOR)
)!=0 &&
c!=0xa0 && c!=0x202f && c!=0xfeff); /* exclude no-break spaces */
}
/* Checks if the Unicode character is printable.*/
U_CAPI UBool U_EXPORT2
u_isprint(UChar32 c) {
return (UBool)(
!IS_ISO_8_CONTROL(c) &&
((1UL<<GET_CATEGORY(GET_PROPS(c)))&
~(1UL<<U_UNASSIGNED|
1UL<<U_CONTROL_CHAR|1UL<<U_FORMAT_CHAR|1UL<<U_PRIVATE_USE_CHAR|1UL<<U_SURROGATE|
1UL<<U_GENERAL_OTHER_TYPES|1UL<<31)
)!=0);
}
/* Checks if the Unicode character can start a Unicode identifier.*/
U_CAPI UBool U_EXPORT2
u_isIDStart(UChar32 c) {
/* same as u_isalpha() */
return (UBool)(((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_UPPERCASE_LETTER|1UL<<U_LOWERCASE_LETTER|1UL<<U_TITLECASE_LETTER|1UL<<U_MODIFIER_LETTER|1UL<<U_OTHER_LETTER)
)!=0);
}
/* Checks if the Unicode character can be a Unicode identifier part other than starting the
identifier.*/
U_CAPI UBool U_EXPORT2
u_isIDPart(UChar32 c) {
return (UBool)(
((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_DECIMAL_DIGIT_NUMBER|1UL<<U_LETTER_NUMBER|
1UL<<U_UPPERCASE_LETTER|1UL<<U_LOWERCASE_LETTER|1UL<<U_TITLECASE_LETTER|1UL<<U_MODIFIER_LETTER|1UL<<U_OTHER_LETTER|
1UL<<U_CONNECTOR_PUNCTUATION|1UL<<U_COMBINING_SPACING_MARK|1UL<<U_NON_SPACING_MARK)
)!=0 ||
u_isIDIgnorable(c));
}
/*Checks if the Unicode character can be ignorable in a Java or Unicode identifier.*/
U_CAPI UBool U_EXPORT2
u_isIDIgnorable(UChar32 c) {
return (UBool)((uint32_t)c<=8 ||
(uint32_t)(c-0xe)<=(0x1b-0xe) ||
(uint32_t)(c-0x7f)<=(0x9f-0x7f) ||
(uint32_t)(c-0x200a)<=(0x200f-0x200a) ||
(uint32_t)(c-0x206a)<=(0x206f-0x206a) ||
c==0xfeff);
}
/*Checks if the Unicode character can start a Java identifier.*/
U_CAPI UBool U_EXPORT2
u_isJavaIDStart(UChar32 c) {
return (UBool)(
((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_UPPERCASE_LETTER|1UL<<U_LOWERCASE_LETTER|1UL<<U_TITLECASE_LETTER|1UL<<U_MODIFIER_LETTER|1UL<<U_OTHER_LETTER|
1UL<<U_CURRENCY_SYMBOL|1UL<<U_CONNECTOR_PUNCTUATION)
)!=0);
}
/*Checks if the Unicode character can be a Java identifier part other than starting the
* identifier.
*/
U_CAPI UBool U_EXPORT2
u_isJavaIDPart(UChar32 c) {
return (UBool)(
((1UL<<GET_CATEGORY(GET_PROPS(c)))&
(1UL<<U_DECIMAL_DIGIT_NUMBER|1UL<<U_LETTER_NUMBER|
1UL<<U_UPPERCASE_LETTER|1UL<<U_LOWERCASE_LETTER|1UL<<U_TITLECASE_LETTER|1UL<<U_MODIFIER_LETTER|1UL<<U_OTHER_LETTER|
1UL<<U_CURRENCY_SYMBOL|1UL<<U_CONNECTOR_PUNCTUATION|
1UL<<U_COMBINING_SPACING_MARK|1UL<<U_NON_SPACING_MARK)
)!=0 ||
u_isIDIgnorable(c));
}
/* Transforms the Unicode character to its lower case equivalent.*/
U_CAPI UChar32 U_EXPORT2
u_tolower(UChar32 c) {
uint32_t props=GET_PROPS(c);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if((1UL<<GET_CATEGORY(props))&(1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
return c+GET_SIGNED_VALUE(props);
}
} else {
uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_LOWERCASE)) {
int i=EXC_LOWERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
return (UChar32)*pe;
}
}
return c; /* no mapping - return c itself */
}
/* Transforms the Unicode character to its upper case equivalent.*/
U_CAPI UChar32 U_EXPORT2
u_toupper(UChar32 c) {
uint32_t props=GET_PROPS(c);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if(GET_CATEGORY(props)==U_LOWERCASE_LETTER) {
return c-GET_SIGNED_VALUE(props);
}
} else {
uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_UPPERCASE)) {
int i=EXC_UPPERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
return (UChar32)*pe;
}
}
return c; /* no mapping - return c itself */
}
/* Transforms the Unicode character to its title case equivalent.*/
U_CAPI UChar32 U_EXPORT2
u_totitle(UChar32 c) {
uint32_t props=GET_PROPS(c);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if(GET_CATEGORY(props)==U_LOWERCASE_LETTER) {
/* here, titlecase is same as uppercase */
return c-GET_SIGNED_VALUE(props);
}
} else {
uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_TITLECASE)) {
int i=EXC_TITLECASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
return (UChar32)*pe;
} else if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_UPPERCASE)) {
/* here, titlecase is same as uppercase */
int i=EXC_UPPERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
return (UChar32)*pe;
}
}
return c; /* no mapping - return c itself */
}
U_CAPI int32_t U_EXPORT2
u_charDigitValue(UChar32 c) {
uint32_t props=GET_PROPS(c);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if(GET_CATEGORY(props)==U_DECIMAL_DIGIT_NUMBER) {
return GET_SIGNED_VALUE(props);
}
} else {
uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_DIGIT_VALUE)) {
int32_t value;
int i=EXC_DIGIT_VALUE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
value=(int32_t)(int16_t)*pe; /* the digit value is in bits 15..0 */
if(value!=-1) {
return value;
}
}
}
/* if there is no value in the properties table, then check for some special characters */
switch(c) {
case 0x3007: return 0; /* Han Zero*/
case 0x4e00: return 1; /* Han One*/
case 0x4e8c: return 2; /* Han Two*/
case 0x4e09: return 3; /* Han Three*/
case 0x56d8: return 4; /* Han Four*/
case 0x4e94: return 5; /* Han Five*/
case 0x516d: return 6; /* Han Six*/
case 0x4e03: return 7; /* Han Seven*/
case 0x516b: return 8; /* Han Eight*/
case 0x4e5d: return 9; /* Han Nine*/
default: return -1; /* no value */
}
}
/* Gets the character's linguistic directionality.*/
U_CAPI UCharDirection U_EXPORT2
u_charDirection(UChar32 c) {
uint32_t props=GET_PROPS(c);
if(props!=0) {
return (UCharDirection)((props>>BIDI_SHIFT)&0x1f);
} else {
return U_BOUNDARY_NEUTRAL;
}
}
U_CAPI UBool U_EXPORT2
u_isMirrored(UChar32 c) {
return (UBool)(GET_PROPS(c)&(1UL<<MIRROR_SHIFT) ? TRUE : FALSE);
}
U_CAPI UChar32 U_EXPORT2
u_charMirror(UChar32 c) {
uint32_t props=GET_PROPS(c);
if((props&(1UL<<MIRROR_SHIFT))==0) {
/* not mirrored - the value is not a mirror offset */
return c;
} else if(!PROPS_VALUE_IS_EXCEPTION(props)) {
return c+GET_SIGNED_VALUE(props);
} else {
uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_MIRROR_MAPPING)) {
int i=EXC_MIRROR_MAPPING;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
return (UChar32)*pe;
} else {
return c;
}
}
}
U_CFUNC uint8_t
u_internalGetCombiningClass(UChar32 c) {
uint32_t props=GET_PROPS_UNSAFE(c);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if(GET_CATEGORY(props)==U_NON_SPACING_MARK) {
return (uint8_t)GET_UNSIGNED_VALUE(props);
} else {
return 0;
}
} else {
/* the combining class is in bits 23..16 of the first exception value */
return (uint8_t)(*GET_EXCEPTIONS(props)>>16);
}
}
U_CAPI uint8_t U_EXPORT2
u_getCombiningClass(UChar32 c) {
uint32_t props=GET_PROPS(c);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if(GET_CATEGORY(props)==U_NON_SPACING_MARK) {
return (uint8_t)GET_UNSIGNED_VALUE(props);
} else {
return 0;
}
} else {
/* the combining class is in bits 23..16 of the first exception value */
return (uint8_t)(*GET_EXCEPTIONS(props)>>16);
}
}
U_CAPI int8_t U_EXPORT2
u_digit(UChar32 ch, int8_t radix) {
int8_t value;
if((uint8_t)(radix-2)<=(36-2)) {
value=(int8_t)u_charDigitValue(ch);
if(value<0) {
/* ch is not a decimal digit, try latin letters */
if(ch>=0x61 && ch<=0x7A) {
value=(int8_t)(ch-0x57); /* ch - 'a' + 10 */
} else if(ch>=0x41 && ch<=0x5A) {
value=(int8_t)(ch-0x37); /* ch - 'A' + 10 */
}
}
} else {
value=-1; /* invalid radix */
}
return (int8_t)((value<radix) ? value : -1);
}
U_CAPI UChar32 U_EXPORT2
u_forDigit(int32_t digit, int8_t radix) {
if((uint8_t)(radix-2)>(36-2) || (uint32_t)digit>=(uint32_t)radix) {
return 0;
} else if(digit<10) {
return (UChar32)(0x30+digit);
} else {
return (UChar32)((0x61-10)+digit);
}
}
/* static data tables ------------------------------------------------------- */
/**********************************************************
*
* WARNING: The below map is machine generated
* by genscrpt after parsing Blocks.txt,
* plese donot edit unless you know what you are doing
*
**********************************************************
*/
#define UBLOCK_CODE_INDEX_SIZE 98
struct UBlockCodeMap {
const UChar32 fFirstCode;
const UChar32 fLastCode;
const UBlockCode code;
};
typedef struct UBlockCodeMap UBlockCodeMap;
static const UBlockCodeMap blockCodeIndex[UBLOCK_CODE_INDEX_SIZE] = {
{ 0x00000000, 0x0000007F, UBLOCK_BASIC_LATIN },
{ 0x00000080, 0x000000FF, UBLOCK_LATIN_1_SUPPLEMENT },
{ 0x00000100, 0x0000017F, UBLOCK_LATIN_EXTENDED_A },
{ 0x00000180, 0x0000024F, UBLOCK_LATIN_EXTENDED_B },
{ 0x00000250, 0x000002AF, UBLOCK_IPA_EXTENSIONS },
{ 0x000002B0, 0x000002FF, UBLOCK_SPACING_MODIFIER_LETTERS },
{ 0x00000300, 0x0000036F, UBLOCK_COMBINING_DIACRITICAL_MARKS },
{ 0x00000370, 0x000003FF, UBLOCK_GREEK },
{ 0x00000400, 0x000004FF, UBLOCK_CYRILLIC },
{ 0x00000530, 0x0000058F, UBLOCK_ARMENIAN },
{ 0x00000590, 0x000005FF, UBLOCK_HEBREW },
{ 0x00000600, 0x000006FF, UBLOCK_ARABIC },
{ 0x00000700, 0x0000074F, UBLOCK_SYRIAC },
{ 0x00000780, 0x000007BF, UBLOCK_THAANA },
{ 0x00000900, 0x0000097F, UBLOCK_DEVANAGARI },
{ 0x00000980, 0x000009FF, UBLOCK_BENGALI },
{ 0x00000A00, 0x00000A7F, UBLOCK_GURMUKHI },
{ 0x00000A80, 0x00000AFF, UBLOCK_GUJARATI },
{ 0x00000B00, 0x00000B7F, UBLOCK_ORIYA },
{ 0x00000B80, 0x00000BFF, UBLOCK_TAMIL },
{ 0x00000C00, 0x00000C7F, UBLOCK_TELUGU },
{ 0x00000C80, 0x00000CFF, UBLOCK_KANNADA },
{ 0x00000D00, 0x00000D7F, UBLOCK_MALAYALAM },
{ 0x00000D80, 0x00000DFF, UBLOCK_SINHALA },
{ 0x00000E00, 0x00000E7F, UBLOCK_THAI },
{ 0x00000E80, 0x00000EFF, UBLOCK_LAO },
{ 0x00000F00, 0x00000FFF, UBLOCK_TIBETAN },
{ 0x00001000, 0x0000109F, UBLOCK_MYANMAR },
{ 0x000010A0, 0x000010FF, UBLOCK_GEORGIAN },
{ 0x00001100, 0x000011FF, UBLOCK_HANGUL_JAMO },
{ 0x00001200, 0x0000137F, UBLOCK_ETHIOPIC },
{ 0x000013A0, 0x000013FF, UBLOCK_CHEROKEE },
{ 0x00001400, 0x0000167F, UBLOCK_UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS },
{ 0x00001680, 0x0000169F, UBLOCK_OGHAM },
{ 0x000016A0, 0x000016FF, UBLOCK_RUNIC },
{ 0x00001780, 0x000017FF, UBLOCK_KHMER },
{ 0x00001800, 0x000018AF, UBLOCK_MONGOLIAN },
{ 0x00001E00, 0x00001EFF, UBLOCK_LATIN_EXTENDED_ADDITIONAL },
{ 0x00001F00, 0x00001FFF, UBLOCK_GREEK_EXTENDED },
{ 0x00002000, 0x0000206F, UBLOCK_GENERAL_PUNCTUATION },
{ 0x00002070, 0x0000209F, UBLOCK_SUPERSCRIPTS_AND_SUBSCRIPTS },
{ 0x000020A0, 0x000020CF, UBLOCK_CURRENCY_SYMBOLS },
{ 0x000020D0, 0x000020FF, UBLOCK_COMBINING_MARKS_FOR_SYMBOLS },
{ 0x00002100, 0x0000214F, UBLOCK_LETTERLIKE_SYMBOLS },
{ 0x00002150, 0x0000218F, UBLOCK_NUMBER_FORMS },
{ 0x00002190, 0x000021FF, UBLOCK_ARROWS },
{ 0x00002200, 0x000022FF, UBLOCK_MATHEMATICAL_OPERATORS },
{ 0x00002300, 0x000023FF, UBLOCK_MISCELLANEOUS_TECHNICAL },
{ 0x00002400, 0x0000243F, UBLOCK_CONTROL_PICTURES },
{ 0x00002440, 0x0000245F, UBLOCK_OPTICAL_CHARACTER_RECOGNITION },
{ 0x00002460, 0x000024FF, UBLOCK_ENCLOSED_ALPHANUMERICS },
{ 0x00002500, 0x0000257F, UBLOCK_BOX_DRAWING },
{ 0x00002580, 0x0000259F, UBLOCK_BLOCK_ELEMENTS },
{ 0x000025A0, 0x000025FF, UBLOCK_GEOMETRIC_SHAPES },
{ 0x00002600, 0x000026FF, UBLOCK_MISCELLANEOUS_SYMBOLS },
{ 0x00002700, 0x000027BF, UBLOCK_DINGBATS },
{ 0x00002800, 0x000028FF, UBLOCK_BRAILLE_PATTERNS },
{ 0x00002E80, 0x00002EFF, UBLOCK_CJK_RADICALS_SUPPLEMENT },
{ 0x00002F00, 0x00002FDF, UBLOCK_KANGXI_RADICALS },
{ 0x00002FF0, 0x00002FFF, UBLOCK_IDEOGRAPHIC_DESCRIPTION_CHARACTERS },
{ 0x00003000, 0x0000303F, UBLOCK_CJK_SYMBOLS_AND_PUNCTUATION },
{ 0x00003040, 0x0000309F, UBLOCK_HIRAGANA },
{ 0x000030A0, 0x000030FF, UBLOCK_KATAKANA },
{ 0x00003100, 0x0000312F, UBLOCK_BOPOMOFO },
{ 0x00003130, 0x0000318F, UBLOCK_HANGUL_COMPATIBILITY_JAMO },
{ 0x00003190, 0x0000319F, UBLOCK_KANBUN },
{ 0x000031A0, 0x000031BF, UBLOCK_BOPOMOFO_EXTENDED },
{ 0x00003200, 0x000032FF, UBLOCK_ENCLOSED_CJK_LETTERS_AND_MONTHS },
{ 0x00003300, 0x000033FF, UBLOCK_CJK_COMPATIBILITY },
{ 0x00003400, 0x00004DB5, UBLOCK_CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A },
{ 0x00004E00, 0x00009FFF, UBLOCK_CJK_UNIFIED_IDEOGRAPHS },
{ 0x0000A000, 0x0000A48F, UBLOCK_YI_SYLLABLES },
{ 0x0000A490, 0x0000A4CF, UBLOCK_YI_RADICALS },
{ 0x0000AC00, 0x0000D7A3, UBLOCK_HANGUL_SYLLABLES },
{ 0x0000D800, 0x0000DB7F, UBLOCK_HIGH_SURROGATES },
{ 0x0000DB80, 0x0000DBFF, UBLOCK_HIGH_PRIVATE_USE_SURROGATES },
{ 0x0000DC00, 0x0000DFFF, UBLOCK_LOW_SURROGATES },
{ 0x0000E000, 0x0000F8FF, UBLOCK_PRIVATE_USE },
{ 0x0000F900, 0x0000FAFF, UBLOCK_CJK_COMPATIBILITY_IDEOGRAPHS },
{ 0x0000FB00, 0x0000FB4F, UBLOCK_ALPHABETIC_PRESENTATION_FORMS },
{ 0x0000FB50, 0x0000FDFF, UBLOCK_ARABIC_PRESENTATION_FORMS_A },
{ 0x0000FE20, 0x0000FE2F, UBLOCK_COMBINING_HALF_MARKS },
{ 0x0000FE30, 0x0000FE4F, UBLOCK_CJK_COMPATIBILITY_FORMS },
{ 0x0000FE50, 0x0000FE6F, UBLOCK_SMALL_FORM_VARIANTS },
{ 0x0000FE70, 0x0000FEFE, UBLOCK_ARABIC_PRESENTATION_FORMS_B },
{ 0x0000FEFF, 0x0000FEFF, UBLOCK_SPECIALS },
{ 0x0000FF00, 0x0000FFEF, UBLOCK_HALFWIDTH_AND_FULLWIDTH_FORMS },
{ 0x0000FFF0, 0x0000FFFD, UBLOCK_SPECIALS },
{ 0x00010300, 0x0001032F, UBLOCK_OLD_ITALIC },
{ 0x00010330, 0x0001034F, UBLOCK_GOTHIC },
{ 0x00010400, 0x0001044F, UBLOCK_DESERET },
{ 0x0001D000, 0x0001D0FF, UBLOCK_BYZANTINE_MUSICAL_SYMBOLS },
{ 0x0001D100, 0x0001D1FF, UBLOCK_MUSICAL_SYMBOLS },
{ 0x0001D400, 0x0001D7FF, UBLOCK_MATHEMATICAL_ALPHANUMERIC_SYMBOLS },
{ 0x00020000, 0x0002A6D6, UBLOCK_CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B },
{ 0x0002F800, 0x0002FA1F, UBLOCK_CJK_COMPATIBILITY_IDEOGRAPHS_SUPPLEMENT },
{ 0x000E0000, 0x000E007F, UBLOCK_TAGS },
{ 0x000F0000, 0x000FFFFD, UBLOCK_PRIVATE_USE },
};
/* Get the script associated with the character*/
UBlockCode
ublock_getCode(UChar32 codepoint)
{
/* binary search the map and return the code */
int32_t left, middle, right,rc;
left =0;
right= UBLOCK_CODE_INDEX_SIZE-1;
while(left <= right){
middle = (left+right)/2;
/* check if the codepoint is the valid range */
if((uint32_t)(blockCodeIndex[middle].fLastCode - codepoint) <=
(blockCodeIndex[middle].fLastCode - blockCodeIndex[middle].fFirstCode)
){
rc = 0;
}else if(codepoint> blockCodeIndex[middle].fLastCode){
rc =-1;
}else {
rc = 1;
}
if(rc<0){
left = middle+1;
}else if(rc >0){
right = middle -1;
}else{
return blockCodeIndex[middle].code;
}
}
return UBLOCK_INVALID_CODE;
}
/******************************************************/
static const UChar cellWidthRanges[] =
{
0x0000, /* general scripts area*/
0x1100, /* combining Hangul choseong*/
0x1160, /* combining Hangul jungseong and jongseong*/
0x1e00, /* Latin Extended Additional, Greek Extended*/
0x2000, /* symbols and punctuation*/
0x3000, /* CJK phonetics & symbols, CJK ideographs, Hangul syllables*/
0xd800, /* surrogates, private use*/
0xf900, /* CJK compatibility ideographs*/
0xfb00, /* alphabetic presentation forms, Arabic presentations forms A, combining half marks*/
0xfe30, /* CJK compatibility forms, small form variants*/
0xfe70, /* Arabic presentation forms B*/
0xff00, /* fullwidth ASCII*/
0xff60, /* halfwidth, CJK punctuation, Katakana, Hangul Jamo*/
0xffe0, /* fullwidth punctuation and currency signs*/
0xffe8, /* halfwidth forms, arrows, and shapes*/
0xfff0 /* specials*/
};
static const UChar cellWidthValues[] =
{
U_HALF_WIDTH, /* general scripts area*/
U_FULL_WIDTH, /* combining Hangul choseong*/
U_ZERO_WIDTH, /* combining Hangul jungseong and jongseong*/
U_HALF_WIDTH, /* Latin extended aAdditional, Greek extended*/
U_NEUTRAL_WIDTH, /* symbols and punctuation*/
U_FULL_WIDTH, /* CJK phonetics & symbols, CJK ideographs, Hangul syllables*/
U_NEUTRAL_WIDTH, /* surrogates, private use*/
U_FULL_WIDTH, /* CJK compatibility ideographs*/
U_HALF_WIDTH, /* alphabetic presentation forms, Arabic presentations forms A, combining half marks*/
U_FULL_WIDTH, /* CJK compatibility forms, small form variants*/
U_HALF_WIDTH, /* Arabic presentation forms B*/
U_FULL_WIDTH, /* fullwidth ASCII*/
U_HALF_WIDTH, /* halfwidth CJK punctuation, Katakana, Hangul Jamo*/
U_FULL_WIDTH, /* fullwidth punctuation and currency signs*/
U_HALF_WIDTH, /* halfwidth forms, arrows, and shapes*/
U_ZERO_WIDTH /* specials*/
};
#define NUM_CELL_WIDTH_VALUES (sizeof(cellWidthValues)/sizeof(cellWidthValues[0]))
/* Gets table cell width of the Unicode character.*/
uint16_t
u_charCellWidth(UChar32 ch)
{
int16_t i;
int32_t type = u_charType(ch);
/* surrogate support is still incomplete */
if((uint32_t)ch>0xffff) {
return U_ZERO_WIDTH;
}
/* these Unicode character types are scattered throughout the Unicode range, so
special-case for them*/
if(IS_ISO_8_CONTROL(ch)) {
return U_ZERO_WIDTH;
}
switch (type) {
case U_UNASSIGNED:
case U_NON_SPACING_MARK:
case U_ENCLOSING_MARK:
case U_LINE_SEPARATOR:
case U_PARAGRAPH_SEPARATOR:
case U_CONTROL_CHAR:
case U_FORMAT_CHAR:
return U_ZERO_WIDTH;
default:
/* for all remaining characters, find out which Unicode range they belong to using
the table above, and then look up the appropriate return value in that table*/
for (i = 0; i < (int16_t)NUM_CELL_WIDTH_VALUES; ++i) {
if (ch < cellWidthRanges[i]) {
break;
}
}
--i;
return cellWidthValues[i];
}
}
void u_getUnicodeVersion(UVersionInfo versionArray) {
if(versionArray!=NULL) {
uprv_memcpy(versionArray, dataVersion, U_MAX_VERSION_LENGTH);
}
}
/* string casing ------------------------------------------------------------ */
/*
* These internal string case mapping functions are here instead of ustring.c
* because we need efficient access to the character properties.
*/
enum {
LOC_ROOT,
LOC_TURKISH,
LOC_LITHUANIAN
};
static int32_t
getCaseLocale(const char *locale) {
char lang[32];
UErrorCode errorCode;
int32_t length;
errorCode=U_ZERO_ERROR;
length=uloc_getLanguage(locale, lang, sizeof(lang), &errorCode);
if(U_FAILURE(errorCode) || length!=2) {
return LOC_ROOT;
}
if( (locale[0]=='t' && locale[1]=='r') ||
(locale[0]=='a' && locale[1]=='z')
) {
return LOC_TURKISH;
} else if(locale[0]=='l' && locale[1]=='t') {
return LOC_LITHUANIAN;
} else {
return LOC_ROOT;
}
}
/* Is case-ignorable? In Unicode 3.1.1, is {HYPHEN, SOFT HYPHEN, {Mn}} ? (Expected to change!) */
static U_INLINE UBool
isCaseIgnorable(UChar32 c, uint32_t category) {
return category==U_NON_SPACING_MARK || c==0x2010 || c==0xad;
}
/* Is followed by {case-ignorable}* {Ll, Lu, Lt} ? */
static UBool
isFollowedByCasedLetter(const UChar *src, UTextOffset srcIndex, int32_t srcLength) {
uint32_t props, category;
UChar32 c;
while(srcIndex<srcLength) {
UTF_NEXT_CHAR(src, srcIndex, srcLength, c);
props=GET_PROPS_UNSAFE(c);
category=GET_CATEGORY(props);
if((1UL<<category)&(1UL<<U_LOWERCASE_LETTER|1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
return TRUE; /* followed by cased letter */
}
if(!isCaseIgnorable(c, category)) {
return FALSE; /* not ignorable */
}
}
return FALSE; /* not followed by cased letter */
}
/* Is preceded by {Ll, Lu, Lt} {case-ignorable}* ? */
static UBool
isPrecededByCasedLetter(const UChar *src, UTextOffset srcIndex) {
uint32_t props, category;
UChar32 c;
while(0<srcIndex) {
UTF_PREV_CHAR(src, 0, srcIndex, c);
props=GET_PROPS_UNSAFE(c);
category=GET_CATEGORY(props);
if((1UL<<category)&(1UL<<U_LOWERCASE_LETTER|1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
return TRUE; /* preceded by cased letter */
}
if(!isCaseIgnorable(c, category)) {
return FALSE; /* not ignorable */
}
}
return FALSE; /* not followed by cased letter */
}
/* Is preceded by base character { 'i', 'j', U+012f, U+1e2d, U+1ecb } with no intervening cc=230 ? */
static UBool
isAfter_i(const UChar *src, UTextOffset srcIndex) {
UChar32 c;
uint8_t cc;
while(0<srcIndex) {
UTF_PREV_CHAR(src, 0, srcIndex, c);
if(c==0x69 || c==0x6a || c==0x12f || c==0x1e2d || c==0x1ecb) {
return TRUE; /* preceded by TYPE_i */
}
cc=u_internalGetCombiningClass(c);
if(cc==0 || cc==230) {
return FALSE; /* preceded by different base character (not TYPE_i), or intervening cc==230 */
}
}
return FALSE; /* not preceded by TYPE_i */
}
/* Is preceded by base character 'I' with no intervening cc=230 ? */
static UBool
isAfter_I(const UChar *src, UTextOffset srcIndex) {
UChar32 c;
uint8_t cc;
while(0<srcIndex) {
UTF_PREV_CHAR(src, 0, srcIndex, c);
if(c==0x49) {
return TRUE; /* preceded by I */
}
cc=u_internalGetCombiningClass(c);
if(cc==0 || cc==230) {
return FALSE; /* preceded by different base character (not I), or intervening cc==230 */
}
}
return FALSE; /* not preceded by I */
}
/* Is followed by one or more cc==230 ? */
static UBool
isFollowedByMoreAbove(const UChar *src, UTextOffset srcIndex, int32_t srcLength) {
UChar32 c;
uint8_t cc;
while(srcIndex<srcLength) {
UTF_NEXT_CHAR(src, srcIndex, srcLength, c);
cc=u_internalGetCombiningClass(c);
if(cc==230) {
return TRUE; /* at least one cc==230 following */
}
if(cc==0) {
return FALSE; /* next base character, no more cc==230 following */
}
}
return FALSE; /* no more cc==230 following */
}
/* Is followed by a dot above (without cc==230 in between) ? */
static UBool
isFollowedByDotAbove(const UChar *src, UTextOffset srcIndex, int32_t srcLength) {
UChar32 c;
uint8_t cc;
while(srcIndex<srcLength) {
UTF_NEXT_CHAR(src, srcIndex, srcLength, c);
if(c==0x307) {
return TRUE;
}
cc=u_internalGetCombiningClass(c);
if(cc==0 || cc==230) {
return FALSE; /* next base character or cc==230 in between */
}
}
return FALSE; /* no dot above following */
}
U_CFUNC int32_t
u_internalStrToLower(UChar *dest, int32_t destCapacity,
const UChar *src, int32_t srcLength,
const char *locale,
UGrowBuffer *growBuffer, void *context,
UErrorCode *pErrorCode) {
UChar buffer[8];
uint32_t *pe;
const UChar *u;
uint32_t props, firstExceptionValue, specialCasing;
int32_t srcIndex, destIndex, i, loc;
UChar32 c;
UBool canGrow;
/* do not attempt to grow if there is no growBuffer function or if it has failed before */
canGrow = (UBool)(growBuffer!=NULL);
/* test early, once, if there is a data file */
if(!HAVE_DATA) {
/*
* If we do not have real character properties data,
* then we only do a fixed-length ASCII case mapping.
*/
if(srcLength<=destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, srcLength, 0)) != 0)
) {
destIndex=srcLength;
*pErrorCode=U_USING_DEFAULT_ERROR;
} else {
destIndex=destCapacity;
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
for(srcIndex=0; srcIndex<destIndex; ++srcIndex) {
c=src[srcIndex];
if((uint32_t)(c-0x41)<26) {
dest[srcIndex]=(UChar)(c+0x20);
} else {
dest[srcIndex]=(UChar)c;
}
}
return srcLength;
}
/* set up local variables */
loc=getCaseLocale(locale);
/* case mapping loop */
srcIndex=destIndex=0;
while(srcIndex<srcLength) {
UTF_NEXT_CHAR(src, srcIndex, srcLength, c);
props=GET_PROPS_UNSAFE(c);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if((1UL<<GET_CATEGORY(props))&(1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
c+=GET_SIGNED_VALUE(props);
}
} else {
pe=GET_EXCEPTIONS(props);
firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_SPECIAL_CASING)) {
i=EXC_SPECIAL_CASING;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
specialCasing=*pe;
/* fill u and i with the case mapping result string */
if(specialCasing&0x80000000) {
/* use hardcoded conditions and mappings */
u=buffer;
if( loc==LOC_LITHUANIAN &&
/* base characters, find accents above */
(((c==0x49 || c==0x4a || c==0x12e) &&
isFollowedByMoreAbove(src, srcIndex, srcLength)) ||
/* precomposed with accent above, no need to find one */
(c==0xcc || c==0xcd || c==0x128))
) {
/* lithuanian: add a dot above if there are more accents above (to always have the dot) */
buffer[1]=0x307;
switch(c) {
case 0x49: /* LATIN CAPITAL LETTER I */
buffer[0]=0x69;
i=2;
break;
case 0x4a: /* LATIN CAPITAL LETTER J */
buffer[0]=0x6a;
i=2;
break;
case 0x12e: /* LATIN CAPITAL LETTER I WITH OGONEK */
buffer[0]=0x12f;
i=2;
break;
case 0xcc: /* LATIN CAPITAL LETTER I WITH GRAVE */
buffer[0]=0x69;
buffer[2]=0x300;
i=3;
break;
case 0xcd: /* LATIN CAPITAL LETTER I WITH ACUTE */
buffer[0]=0x69;
buffer[2]=0x301;
i=3;
break;
case 0x128: /* LATIN CAPITAL LETTER I WITH TILDE */
buffer[0]=0x69;
buffer[2]=0x303;
i=3;
break;
default:
i=0; /* will not occur */
break;
}
/*
* Note: This handling of I and of dot above differs from Unicode 3.1.1's SpecialCasing-5.txt
* because the AFTER_i condition there does not work for decomposed I+dot above.
* This fix is being proposed to the UTC.
*/
} else if(loc==LOC_TURKISH && c==0x49 && !isFollowedByDotAbove(src, srcIndex, srcLength)) {
/* turkish: I maps to dotless i */
buffer[0]=0x131;
i=1;
/* other languages (or turkish with decomposed I+dot above): I maps to i */
} else if(c==0x307 && isAfter_I(src, srcIndex-1) && !isFollowedByMoreAbove(src, srcIndex, srcLength)) {
/* decomposed I+dot above becomes i (see handling of U+0049 for turkish) and removes the dot above */
continue; /* remove the dot (continue without output) */
} else if( c==0x3a3 &&
!isFollowedByCasedLetter(src, srcIndex, srcLength) &&
isPrecededByCasedLetter(src, srcIndex-1)
) {
/* greek capital sigma maps depending on surrounding cased letters (see SpecialCasing-5.txt) */
buffer[0]=0x3c2; /* greek small final sigma */
i=1;
} else {
/* no known conditional special case mapping, use a normal mapping */
pe=GET_EXCEPTIONS(props); /* restore the initial exception pointer */
firstExceptionValue=*pe;
goto notSpecial;
}
} else {
/* get the special case mapping string from the data file */
u=ucharsTable+(specialCasing&0xffff);
i=(int32_t)(*u++)&0x1f;
}
/* output this case mapping result string */
if( (destIndex+i)<=destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, destCapacity+2*(srcLength-srcIndex+i)+20, destIndex)) != 0)
) {
/* copy the case mapping to the destination */
while(i>0) {
dest[destIndex++]=*u++;
--i;
}
} else {
/* buffer overflow */
/* copy as much as possible */
while(destIndex<destCapacity) {
dest[destIndex++]=*u++;
--i;
}
/* keep incrementing the destIndex for preflighting */
destIndex+=i;
}
/* do not fall through to the output of c */
continue;
}
notSpecial:
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_LOWERCASE)) {
i=EXC_LOWERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
c=(UChar32)*pe;
}
}
/* handle 1:1 code point mappings from UnicodeData.txt */
if(c<=0xffff) {
if( destIndex<destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, destCapacity+2*(srcLength-srcIndex+1)+20, destIndex)) != 0)
) {
dest[destIndex++]=(UChar)c;
} else {
/* buffer overflow */
/* keep incrementing the destIndex for preflighting */
++destIndex;
}
} else {
if( (destIndex+2)<=destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, destCapacity+2*(srcLength-srcIndex+2)+20, destIndex)) != 0)
) {
dest[destIndex++]=(UChar)(0xd7c0+(c>>10));
dest[destIndex++]=(UChar)(0xdc00|(c&0x3ff));
} else {
/* buffer overflow */
/* write the first surrogate if possible */
if(destIndex<destCapacity) {
dest[destIndex]=(UChar)(0xd7c0+(c>>10));
}
/* keep incrementing the destIndex for preflighting */
destIndex+=2;
}
}
}
if(destIndex>destCapacity) {
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
return destIndex;
}
U_CFUNC int32_t
u_internalStrToUpper(UChar *dest, int32_t destCapacity,
const UChar *src, int32_t srcLength,
const char *locale,
UGrowBuffer *growBuffer, void *context,
UErrorCode *pErrorCode) {
UChar buffer[8];
uint32_t *pe;
const UChar *u;
uint32_t props, firstExceptionValue, specialCasing;
int32_t srcIndex, destIndex, i, loc;
UChar32 c;
UBool canGrow;
/* do not attempt to grow if there is no growBuffer function or if it has failed before */
canGrow = (UBool)(growBuffer!=NULL);
/* test early, once, if there is a data file */
if(!HAVE_DATA) {
/*
* If we do not have real character properties data,
* then we only do a fixed-length ASCII case mapping.
*/
if(srcLength<=destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, srcLength, 0)) != 0)
) {
destIndex=srcLength;
*pErrorCode=U_USING_DEFAULT_ERROR;
} else {
destIndex=destCapacity;
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
for(srcIndex=0; srcIndex<destIndex; ++srcIndex) {
c=src[srcIndex];
if((uint32_t)(c-0x61)<26) {
dest[srcIndex]=(UChar)(c-0x20);
} else {
dest[srcIndex]=(UChar)c;
}
}
return srcLength;
}
/* set up local variables */
loc=getCaseLocale(locale);
/* case mapping loop */
srcIndex=destIndex=0;
while(srcIndex<srcLength) {
UTF_NEXT_CHAR(src, srcIndex, srcLength, c);
props=GET_PROPS_UNSAFE(c);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if(GET_CATEGORY(props)==U_LOWERCASE_LETTER) {
c-=GET_SIGNED_VALUE(props);
}
} else {
pe=GET_EXCEPTIONS(props);
firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_SPECIAL_CASING)) {
i=EXC_SPECIAL_CASING;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
specialCasing=*pe;
/* fill u and i with the case mapping result string */
if(specialCasing&0x80000000) {
/* use hardcoded conditions and mappings */
u=buffer;
if(loc==LOC_TURKISH && c==0x69) {
/* turkish: i maps to dotted I */
buffer[0]=0x130;
i=1;
} else if(loc==LOC_LITHUANIAN && c==0x307 && isAfter_i(src, srcIndex-1)) {
/* lithuanian: remove DOT ABOVE after U+0069 "i" with upper or titlecase */
continue; /* remove the dot (continue without output) */
} else {
/* no known conditional special case mapping, use a normal mapping */
pe=GET_EXCEPTIONS(props); /* restore the initial exception pointer */
firstExceptionValue=*pe;
goto notSpecial;
}
} else {
/* get the special case mapping string from the data file */
u=ucharsTable+(specialCasing&0xffff);
i=(int32_t)*u++;
/* skip the lowercase result string */
u+=i&0x1f;
i=(i>>5)&0x1f;
}
/* output this case mapping result string */
if( (destIndex+i)<=destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, destCapacity+2*(srcLength-srcIndex+i)+20, destIndex)) != 0)
) {
/* copy the case mapping to the destination */
while(i>0) {
dest[destIndex++]=*u++;
--i;
}
} else {
/* buffer overflow */
/* copy as much as possible */
while(destIndex<destCapacity) {
dest[destIndex++]=*u++;
--i;
}
/* keep incrementing the destIndex for preflighting */
destIndex+=i;
}
/* do not fall through to the output of c */
continue;
}
notSpecial:
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_UPPERCASE)) {
i=EXC_UPPERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
c=(UChar32)*pe;
}
}
/* handle 1:1 code point mappings from UnicodeData.txt */
if(c<=0xffff) {
if( destIndex<destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, destCapacity+2*(srcLength-srcIndex+1)+20, destIndex)) != 0)
) {
dest[destIndex++]=(UChar)c;
} else {
/* buffer overflow */
/* keep incrementing the destIndex for preflighting */
++destIndex;
}
} else {
if( (destIndex+2)<=destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, destCapacity+2*(srcLength-srcIndex+2)+20, destIndex)) != 0)
) {
dest[destIndex++]=(UChar)(0xd7c0+(c>>10));
dest[destIndex++]=(UChar)(0xdc00|(c&0x3ff));
} else {
/* buffer overflow */
/* write the first surrogate if possible */
if(destIndex<destCapacity) {
dest[destIndex]=(UChar)(0xd7c0+(c>>10));
}
/* keep incrementing the destIndex for preflighting */
destIndex+=2;
}
}
}
if(destIndex>destCapacity) {
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
return destIndex;
}
/* case folding ------------------------------------------------------------- */
/*
* Case folding is similar to lowercasing.
* The result may be a simple mapping, i.e., a single code point, or
* a full mapping, i.e., a string.
* If the case folding for a code point is the same as its simple (1:1) lowercase mapping,
* then only the lowercase mapping is stored.
*/
/* return the simple case folding mapping for c */
U_CAPI UChar32 U_EXPORT2
u_foldCase(UChar32 c, uint32_t options) {
uint32_t props=GET_PROPS(c);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if((1UL<<GET_CATEGORY(props))&(1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
return c+GET_SIGNED_VALUE(props);
}
} else {
uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_CASE_FOLDING)) {
uint32_t *oldPE=pe;
int i=EXC_CASE_FOLDING;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
props=*pe;
if(props!=0) {
/* return the simple mapping, if there is one */
const UChar *uchars=ucharsTable+(props&0xffff);
UChar32 simple;
i=0;
UTF_NEXT_CHAR_UNSAFE(uchars, i, simple);
if(simple!=0) {
return simple;
}
/* fall through to use the lowercase exception value if there is no simple mapping */
pe=oldPE;
} else {
/* special case folding mappings, hardcoded */
if(options==U_FOLD_CASE_DEFAULT && (uint32_t)(c-0x130)<=1) {
/* map dotted I and dotless i to U+0069 small i */
return 0x69;
}
/* return c itself because it is excluded from case folding */
return c;
}
}
/* not else! - allow to fall through from above */
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_LOWERCASE)) {
int i=EXC_LOWERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
return (UChar32)*pe;
}
}
return c; /* no mapping - return c itself */
}
/* internal, return the full case folding mapping for c, must be used only if uprv_haveProperties() is true */
U_CFUNC int32_t
u_internalFoldCase(UChar32 c, UChar dest[32], uint32_t options) {
uint32_t props=GET_PROPS_UNSAFE(c);
int32_t i;
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if((1UL<<GET_CATEGORY(props))&(1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
c+=GET_SIGNED_VALUE(props);
}
} else {
uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_CASE_FOLDING)) {
i=EXC_CASE_FOLDING;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
props=*pe;
if(props!=0) {
/* return the full mapping */
const UChar *uchars=ucharsTable+(props&0xffff)+2;
props>>=24;
/* copy the result string */
i=0;
while(i<(int32_t)props) {
dest[i++]=*uchars++;
}
return i;
} else {
/* special case folding mappings, hardcoded */
if(options==U_FOLD_CASE_DEFAULT && (uint32_t)(c-0x130)<=1) {
/* map dotted I and dotless i to U+0069 small i */
dest[0]=0x69;
return 1;
}
/* return c itself because it is excluded from case folding */
}
} else if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_LOWERCASE)) {
i=EXC_LOWERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
c=(UChar32)*pe;
}
}
/* write c to dest */
i=0;
UTF_APPEND_CHAR_UNSAFE(dest, i, c);
return i;
}
/* case-fold the source string using the full mappings */
U_CFUNC int32_t
u_internalStrFoldCase(UChar *dest, int32_t destCapacity,
const UChar *src, int32_t srcLength,
uint32_t options,
UGrowBuffer *growBuffer, void *context,
UErrorCode *pErrorCode) {
UChar buffer[UTF_MAX_CHAR_LENGTH];
uint32_t *pe;
const UChar *uchars, *u;
uint32_t props, firstExceptionValue;
int32_t srcIndex, destIndex, i;
UChar32 c;
UBool canGrow;
/* do not attempt to grow if there is no growBuffer function or if it has failed before */
canGrow = (UBool)(growBuffer!=NULL);
/* test early, once, if there is a data file */
if(!HAVE_DATA) {
/*
* If we do not have real character properties data,
* then we only do a fixed-length ASCII case mapping.
*/
if(srcLength<=destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, srcLength, 0)) != 0)
) {
destIndex=srcLength;
*pErrorCode=U_USING_DEFAULT_ERROR;
} else {
destIndex=destCapacity;
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
for(srcIndex=0; srcIndex<destIndex; ++srcIndex) {
c=src[srcIndex];
if((uint32_t)(c-0x41)<26) {
dest[srcIndex]=(UChar)(c+0x20);
} else {
dest[srcIndex]=(UChar)c;
}
}
return srcLength;
}
/* set up local variables */
/* add 2 because we always need to skip the 2 UChars for the simple mappings */
uchars=ucharsTable+2;
/* case mapping loop */
srcIndex=destIndex=0;
while(srcIndex<srcLength) {
UTF_NEXT_CHAR(src, srcIndex, srcLength, c);
props=GET_PROPS_UNSAFE(c);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if((1UL<<GET_CATEGORY(props))&(1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
c+=GET_SIGNED_VALUE(props);
}
} else {
pe=GET_EXCEPTIONS(props);
firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_CASE_FOLDING)) {
i=EXC_CASE_FOLDING;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
props=*pe;
/* fill u and i with the case mapping result string */
if(props!=0) {
/* get the case folding string from the data file */
u=uchars+(props&0xffff);
i=(int32_t)(props>>24);
} else {
/* special case folding mappings, hardcoded */
u=buffer;
if(options==U_FOLD_CASE_DEFAULT && (uint32_t)(c-0x130)<=1) {
/* map dotted I and dotless i to U+0069 small i */
buffer[0]=0x69;
i=1;
} else {
/* output c itself because it is excluded from case folding */
i=0;
UTF_APPEND_CHAR_UNSAFE(buffer, i, c);
}
}
/* output this case mapping result string */
if( (destIndex+i)<=destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, destCapacity+2*(srcLength-srcIndex+i)+20, destIndex)) != 0)
) {
/* copy the case mapping to the destination */
while(i>0) {
dest[destIndex++]=*u++;
--i;
}
} else {
/* buffer overflow */
/* copy as much as possible */
while(destIndex<destCapacity) {
dest[destIndex++]=*u++;
--i;
}
/* keep incrementing the destIndex for preflighting */
destIndex+=i;
}
/* do not fall through to the output of c */
continue;
} else if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_LOWERCASE)) {
i=EXC_LOWERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
c=(UChar32)*pe;
}
}
/* handle 1:1 code point mappings from UnicodeData.txt */
if(c<=0xffff) {
if( destIndex<destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, destCapacity+2*(srcLength-srcIndex+1)+20, destIndex)) != 0)
) {
dest[destIndex++]=(UChar)c;
} else {
/* buffer overflow */
/* keep incrementing the destIndex for preflighting */
++destIndex;
}
} else {
if( (destIndex+2)<=destCapacity ||
/* attempt to grow the buffer */
(canGrow && (canGrow=growBuffer(context, &dest, &destCapacity, destCapacity+2*(srcLength-srcIndex+2)+20, destIndex)) != 0)
) {
dest[destIndex++]=(UChar)(0xd7c0+(c>>10));
dest[destIndex++]=(UChar)(0xdc00|(c&0x3ff));
} else {
/* buffer overflow */
/* write the first surrogate if possible */
if(destIndex<destCapacity) {
dest[destIndex]=(UChar)(0xd7c0+(c>>10));
}
/* keep incrementing the destIndex for preflighting */
destIndex+=2;
}
}
}
if(destIndex>destCapacity) {
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
return destIndex;
}
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