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10bd90bfc1
scuffed-code/icu4c/source/common/uchar.c
Markus Scherer 10bd90bfc1 ICU-1923 upgrade to Unicode 3.2: lowercasing and uppercasing 
X-SVN-Rev: 8811
2002-06-07 18:53:49 +00:00

1858 lines
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C
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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 "unicode/uiter.h"
#include "umutex.h"
#include "cmemory.h"
#include "ucln_cmn.h"
#include "utrie.h"
#include "ustr_imp.h"
#include "uprops.h"
/* dynamically loaded Unicode character properties -------------------------- */
/*
* loaded uprops.dat -
* for a description of the file format, see icu/source/tools/genprops/store.c
*/
static const char DATA_NAME[] = "uprops";
static const char DATA_TYPE[] = "dat";
static UDataMemory *propsData=NULL;
static uint8_t formatVersion[4]={ 0, 0, 0, 0 };
static UVersionInfo dataVersion={ 3, 0, 0, 0 };
static UTrie propsTrie={ 0 }, propsVectorsTrie={ 0 };
static const uint32_t *pData32=NULL, *props32Table=NULL, *exceptionsTable=NULL, *propsVectors=NULL;
static const UChar *ucharsTable=NULL;
static int32_t countPropsVectors=0, propsVectorsColumns=0;
static int8_t havePropsData=0;
/* index values loaded from uprops.dat */
static int32_t indexes[UPROPS_INDEX_COUNT];
/* if bit 15 is set, then the folding offset is in bits 14..0 of the 16-bit trie result */
static int32_t U_CALLCONV
getFoldingPropsOffset(uint32_t data) {
if(data&0x8000) {
return (int32_t)(data&0x7fff);
} else {
return 0;
}
}
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]==3 &&
pInfo->formatVersion[2]==UTRIE_SHIFT &&
pInfo->formatVersion[3]==UTRIE_INDEX_SHIFT
) {
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;
}
pData32=NULL;
props32Table=NULL;
exceptionsTable=NULL;
ucharsTable=NULL;
propsVectors=NULL;
countPropsVectors=0;
havePropsData=FALSE;
return TRUE;
}
static int8_t
loadPropsData(void) {
/* load Unicode character properties data from file if necessary */
if(havePropsData==0) {
UTrie trie={ 0 }, trie2={ 0 };
UErrorCode errorCode=U_ZERO_ERROR;
UDataMemory *data;
const uint32_t *p=NULL;
int32_t length;
/* 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 uint32_t *)udata_getMemory(data);
/* unserialize the trie; it is directly after the int32_t indexes[UPROPS_INDEX_COUNT] */
length=(int32_t)p[UPROPS_PROPS32_INDEX]*4;
length=utrie_unserialize(&trie, (const uint8_t *)(p+UPROPS_INDEX_COUNT), length-64, &errorCode);
if(U_FAILURE(errorCode)) {
udata_close(data);
return havePropsData=-1;
}
trie.getFoldingOffset=getFoldingPropsOffset;
/* unserialize the properties vectors trie, if any */
if( p[UPROPS_ADDITIONAL_TRIE_INDEX]!=0 &&
p[UPROPS_ADDITIONAL_VECTORS_INDEX]!=0
) {
length=(int32_t)(p[UPROPS_ADDITIONAL_VECTORS_INDEX]-p[UPROPS_ADDITIONAL_TRIE_INDEX])*4;
length=utrie_unserialize(&trie2, (const uint8_t *)(p+p[UPROPS_ADDITIONAL_TRIE_INDEX]), length, &errorCode);
if(U_FAILURE(errorCode)) {
uprv_memset(&trie2, 0, sizeof(trie2));
} else {
trie2.getFoldingOffset=getFoldingPropsOffset;
}
}
/* in the mutex block, set the data for this process */
umtx_lock(NULL);
if(propsData==NULL) {
propsData=data;
data=NULL;
pData32=p;
p=NULL;
uprv_memcpy(&propsTrie, &trie, sizeof(trie));
uprv_memcpy(&propsVectorsTrie, &trie2, sizeof(trie2));
}
umtx_unlock(NULL);
/* initialize some variables */
uprv_memcpy(indexes, pData32, sizeof(indexes));
props32Table=pData32+indexes[UPROPS_PROPS32_INDEX];
exceptionsTable=pData32+indexes[UPROPS_EXCEPTIONS_INDEX];
ucharsTable=(const UChar *)(pData32+indexes[UPROPS_EXCEPTIONS_TOP_INDEX]);
/* additional properties */
if(indexes[UPROPS_ADDITIONAL_VECTORS_INDEX]!=0) {
propsVectors=pData32+indexes[UPROPS_ADDITIONAL_VECTORS_INDEX];
countPropsVectors=indexes[UPROPS_RESERVED_INDEX]-indexes[UPROPS_ADDITIONAL_VECTORS_INDEX];
propsVectorsColumns=indexes[UPROPS_ADDITIONAL_VECTORS_COLUMNS_INDEX];
}
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_UNUSED,
EXC_NUMERIC_VALUE,
EXC_DENOMINATOR_VALUE,
EXC_MIRROR_MAPPING,
EXC_SPECIAL_CASING,
EXC_CASE_FOLDING
};
/* 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, result) \
UTRIE_GET16(&propsTrie, c, result); \
(result)=props32Table[(result)]
#define GET_PROPS(c, result) \
if(HAVE_DATA) { \
GET_PROPS_UNSAFE(c, result); \
} else { \
(result)=0; \
}
#define PROPS_VALUE_IS_EXCEPTION(props) ((props)&UPROPS_EXCEPTION_BIT)
#define GET_CATEGORY(props) ((props)&0x1f)
#define GET_NUMERIC_TYPE(props) (((props)>>UPROPS_NUMERIC_TYPE_SHIFT)&7)
/* ### TODO: 2 or 3 bits for numericType?! */
#define GET_UNSIGNED_VALUE(props) ((props)>>UPROPS_VALUE_SHIFT)
#define GET_SIGNED_VALUE(props) ((int32_t)(props)>>UPROPS_VALUE_SHIFT)
#define GET_EXCEPTIONS(props) (exceptionsTable+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) {
uint32_t props;
GET_PROPS(c, props);
return (int8_t)GET_CATEGORY(props);
}
/* Enumerate all code points with their general categories. */
struct _EnumTypeCallback {
UCharEnumTypeRange *enumRange;
const void *context;
};
static uint32_t U_CALLCONV
_enumTypeValue(const void *context, uint32_t value) {
/* access the general category from the 32-bit properties, and those from the 16-bit trie value */
return GET_CATEGORY(props32Table[value]);
}
static UBool U_CALLCONV
_enumTypeRange(const void *context, UChar32 start, UChar32 limit, uint32_t value) {
/* just cast the value to UCharCategory */
return ((struct _EnumTypeCallback *)context)->
enumRange(((struct _EnumTypeCallback *)context)->context,
start, limit, (UCharCategory)value);
}
U_CAPI void U_EXPORT2
u_enumCharTypes(UCharEnumTypeRange *enumRange, const void *context) {
struct _EnumTypeCallback callback;
if(enumRange==NULL || !HAVE_DATA) {
return;
}
callback.enumRange=enumRange;
callback.context=context;
utrie_enum(&propsTrie, _enumTypeValue, _enumTypeRange, &callback);
}
/* Checks if ch is a lower case letter.*/
U_CAPI UBool U_EXPORT2
u_islower(UChar32 c) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(GET_CATEGORY(props)==U_LOWERCASE_LETTER);
}
/* Checks if ch is an upper case letter.*/
U_CAPI UBool U_EXPORT2
u_isupper(UChar32 c) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(GET_CATEGORY(props)==U_UPPERCASE_LETTER);
}
/* Checks if ch is a title case letter; usually upper case letters.*/
U_CAPI UBool U_EXPORT2
u_istitle(UChar32 c) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(GET_CATEGORY(props)==U_TITLECASE_LETTER);
}
/* Checks if ch is a decimal digit. */
U_CAPI UBool U_EXPORT2
u_isdigit(UChar32 c) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(((1UL<<GET_CATEGORY(props))&
(1UL<<U_DECIMAL_DIGIT_NUMBER|1UL<<U_OTHER_NUMBER|1UL<<U_LETTER_NUMBER)
)!=0);
/* ### TODO: should this not check only U_DECIMAL_DIGIT_NUMBER?! */
}
/* Checks if the Unicode character is a letter.*/
U_CAPI UBool U_EXPORT2
u_isalpha(UChar32 c) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(((1UL<<GET_CATEGORY(props))&
(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) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(((1UL<<GET_CATEGORY(props))&
(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) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(GET_CATEGORY(props)!=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) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(((1UL<<GET_CATEGORY(props))&
(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) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(
((1UL<<GET_CATEGORY(props))&
(1UL<<U_CONTROL_CHAR|1UL<<U_FORMAT_CHAR|1UL<<U_LINE_SEPARATOR|1UL<<U_PARAGRAPH_SEPARATOR)
)!=0);
}
/* Some control characters that are used as space. */
#define IS_THAT_CONTROL_SPACE(c) \
((c>=0x09 && c <= 0x0d) || (c>=0x1c && c <=0x1f) || c==0x85)
/* Checks if the Unicode character is a space character.*/
U_CAPI UBool U_EXPORT2
u_isspace(UChar32 c) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)((((1UL<<GET_CATEGORY(props))&
(1UL<<U_SPACE_SEPARATOR|1UL<<U_LINE_SEPARATOR|1UL<<U_PARAGRAPH_SEPARATOR)
)!=0) || IS_THAT_CONTROL_SPACE(c));
}
/* Checks if the Unicode character is a whitespace character.*/
U_CAPI UBool U_EXPORT2
u_isWhitespace(UChar32 c) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)((((1UL<<GET_CATEGORY(props))&
(1UL<<U_SPACE_SEPARATOR|1UL<<U_LINE_SEPARATOR|1UL<<U_PARAGRAPH_SEPARATOR)
)!=0 &&
c!=0xa0 && c!=0x202f && c!=0xfeff) || /* exclude no-break spaces */
IS_THAT_CONTROL_SPACE(c));
}
/* Checks if the Unicode character is printable.*/
U_CAPI UBool U_EXPORT2
u_isprint(UChar32 c) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(
((1UL<<GET_CATEGORY(props))&
~(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() */
uint32_t props;
GET_PROPS(c, props);
return (UBool)(((1UL<<GET_CATEGORY(props))&
(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) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(
((1UL<<GET_CATEGORY(props))&
(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) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(
((1UL<<GET_CATEGORY(props))&
(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) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(
((1UL<<GET_CATEGORY(props))&
(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, props);
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 {
const 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, props);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if(GET_CATEGORY(props)==U_LOWERCASE_LETTER) {
return c-GET_SIGNED_VALUE(props);
}
} else {
const 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, props);
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 {
const 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, numericType;
GET_PROPS(c, props);
numericType=GET_NUMERIC_TYPE(props);
#if 0
/* ### TODO: new numericType==4 for Han numbers?! */
if(numericType==0) {
return -1;
}
#endif
if(numericType==1) {
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
return GET_SIGNED_VALUE(props);
} else {
const uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_NUMERIC_VALUE)) {
int i=EXC_NUMERIC_VALUE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
return (int32_t)*pe;
}
}
}
/* ### TODO: new numericType==4 for Han numbers?! */
/* 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, props);
if(props!=0) {
return (UCharDirection)((props>>UPROPS_BIDI_SHIFT)&0x1f);
} else {
return U_BOUNDARY_NEUTRAL;
}
}
U_CAPI UBool U_EXPORT2
u_isMirrored(UChar32 c) {
uint32_t props;
GET_PROPS(c, props);
return (UBool)(props&(1UL<<UPROPS_MIRROR_SHIFT) ? TRUE : FALSE);
}
U_CAPI UChar32 U_EXPORT2
u_charMirror(UChar32 c) {
uint32_t props;
GET_PROPS(c, props);
if((props&(1UL<<UPROPS_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 {
const 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;
}
}
}
/* ICU 2.1: u_getCombiningClass() moved to unorm.cpp */
U_CAPI int32_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 ------------------------------------------------------- */
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.*/
U_CAPI uint16_t U_EXPORT2
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*/
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];
}
}
U_CAPI void U_EXPORT2
u_getUnicodeVersion(UVersionInfo versionArray) {
if(versionArray!=NULL) {
if(HAVE_DATA) {
uprv_memcpy(versionArray, dataVersion, U_MAX_VERSION_LENGTH);
} else {
uprv_memset(versionArray, 0, U_MAX_VERSION_LENGTH);
}
}
}
U_CFUNC uint32_t
u_getUnicodeProperties(UChar32 c, int32_t column) {
uint16_t vecIndex;
if( !HAVE_DATA || countPropsVectors==0 ||
(uint32_t)c>0x10ffff ||
column<0 || column>=propsVectorsColumns
) {
return 0;
}
UTRIE_GET16(&propsVectorsTrie, c, vecIndex);
return propsVectors[vecIndex+column];
}
/* string casing ------------------------------------------------------------ */
/*
* These internal string case mapping functions are here instead of ustring.c
* because we need efficient access to the character properties.
*
* This section contains helper functions that check for conditions
* in the input text surrounding the current code point
* according to SpecialCasing.txt.
*
* Starting with ICU 2.1, the "surrounding text" is passed in as an instance of
* UCharIterator to allow the core case mapping functions to be used
* inside transliterators (using Replaceable instead of UnicodeString/UChar *)
* etc.
*
* Each helper function gets the index
* - after the current code point if it looks at following text
* - before the current code point if it looks at preceding text
*
* Unicode 3.2 UAX 21 "Case Mappings" defines the conditions as follows:
*
* Final_Sigma
* C is preceded by a sequence consisting of
* a cased letter and a case-ignorable sequence,
* and C is not followed by a sequence consisting of
* an ignorable sequence and then a cased letter.
*
* More_Above
* C is followed by one or more characters of combining class 230 (ABOVE)
* in the combining character sequence.
*
* After_Soft_Dotted
* The last preceding character with combining class of zero before C
* was Soft_Dotted,
* and there is no intervening combining character class 230 (ABOVE).
*
* Before_Dot
* C is followed by combining dot above (U+0307).
* Any sequence of characters with a combining class that is neither 0 nor 230
* may intervene between the current character and the combining dot above.
*
* Helper definitions in Unicode 3.2 UAX 21:
*
* D1. A character C is defined to be cased
* if it meets any of the following criteria:
*
* - The general category of C is Titlecase Letter (Lt)
* - In [CoreProps], C has one of the properties Uppercase, or Lowercase
* - Given D = NFD(C), then it is not the case that:
* D = UCD_lower(D) = UCD_upper(D) = UCD_title(D)
* (This third criterium does not add any characters to the list
* for Unicode 3.2. Ignored.)
*
* D2. A character C is defined to be case-ignorable
* if it meets either of the following criteria:
*
* - The general category of C is
* Nonspacing Mark (Mn), or Enclosing Mark (Me), or Format Control (Cf), or
* Letter Modifier (Lm), or Symbol Modifier (Sk)
* - C is one of the following characters
* U+0027 APOSTROPHE
* U+00AD SOFT HYPHEN (SHY)
* U+2019 RIGHT SINGLE QUOTATION MARK
* (the preferred character for apostrophe)
*
* D3. A case-ignorable sequence is a sequence of
* zero or more case-ignorable characters.
*/
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( (lang[0]=='t' && lang[1]=='r') ||
(lang[0]=='a' && lang[1]=='z')
) {
return LOC_TURKISH;
} else if(lang[0]=='l' && lang[1]=='t') {
return LOC_LITHUANIAN;
} else {
return LOC_ROOT;
}
}
/* Is case-ignorable? */
static U_INLINE UBool
isCaseIgnorable(UChar32 c, uint32_t category) {
return (FLAG(category)&(_Mn|_Me|_Cf|_Lm|_Sk))!=0 ||
c==0x27 || c==0xad || c==0x2019;
}
/* Is this a "cased" character? */
static U_INLINE UBool
isCased(UChar32 c, uint32_t category) {
/* Lt+Uppercase+Lowercase = Lt+Lu+Ll+Other_Uppercase+Other_Lowercase */
return (FLAG(category)&(_Lt|_Lu|_Ll))!=0 ||
(u_getUnicodeProperties(c, 1)&(FLAG(UPROPS_OTHER_UPPERCASE)|FLAG(UPROPS_OTHER_LOWERCASE)))!=0;
}
/* Is Soft_Dotted? */
static U_INLINE UBool
isSoftDotted(UChar32 c) {
return (u_getUnicodeProperties(c, 1)&FLAG(UPROPS_SOFT_DOTTED))!=0;
}
/* Is followed by {case-ignorable}* cased ? */
static UBool
isFollowedByCasedLetter(UCharIterator *iter, int32_t index) {
/* This is volatile because AIX 5.1 Visual Age 5.0 in 32-bit mode can't
optimize this correctly. It couldn't optimize (1UL<<category)&0xE
*/
volatile uint32_t category;
uint32_t props;
int32_t c;
if(iter==NULL) {
return FALSE;
}
iter->move(iter, index, UITER_ZERO);
for(;;) {
c=uiter_next32(iter);
if(c<0) {
break;
}
GET_PROPS_UNSAFE(c, props);
category=GET_CATEGORY(props);
if(isCased(c, category)) {
return TRUE; /* followed by cased letter */
}
if(!isCaseIgnorable(c, category)) {
return FALSE; /* not ignorable */
}
}
return FALSE; /* not followed by cased letter */
}
/* Is preceded by cased {case-ignorable}* ? */
static UBool
isPrecededByCasedLetter(UCharIterator *iter, int32_t index) {
/* This is volatile because AIX 5.1 Visual Age 5.0 in 32-bit mode can't
optimize this correctly. It couldn't optimize (1UL<<category)&0xE
*/
volatile uint32_t category;
uint32_t props;
int32_t c;
if(iter==NULL) {
return FALSE;
}
iter->move(iter, index, UITER_ZERO);
for(;;) {
c=uiter_previous32(iter);
if(c<0) {
break;
}
GET_PROPS_UNSAFE(c, props);
category=GET_CATEGORY(props);
if(isCased(c, category)) {
return TRUE; /* preceded by cased letter */
}
if(!isCaseIgnorable(c, category)) {
return FALSE; /* not ignorable */
}
}
return FALSE; /* not followed by cased letter */
}
/* Is preceded by Soft_Dotted character with no intervening cc=230 ? */
static UBool
isPrecededBySoftDotted(UCharIterator *iter, int32_t index) {
int32_t c;
uint8_t cc;
if(iter==NULL) {
return FALSE;
}
iter->move(iter, index, UITER_ZERO);
for(;;) {
c=uiter_previous32(iter);
if(c<0) {
break;
}
if(isSoftDotted(c)) {
return TRUE; /* preceded by TYPE_i */
}
cc=u_getCombiningClass(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 */
}
#if 0
/*
* ### TODO write a bug doc for the UTC and re-enable this with a newer version
* of Unicode.
*
* ICU 2.0/2.1 used to check for After_I for the Turkic-conditional removal
* of U+0307 instead of checking for After_i (now After_Soft_Dotted).
*
* I believe that After_Soft_Dotted is a mistake because it results in different
* lowercase mappings for the canonically equivalent I-dot and I+dot
* (should both map to i).
* The comment in SpecialCasing.txt appears to agree.
# When lowercasing, remove dot_above in the sequence I + dot_above, which will turn into i.
# This matches the behavior of the canonically equivalent I-dot_above
0307; ; 0307; 0307; tr After_Soft_Dotted; # COMBINING DOT ABOVE
0307; ; 0307; 0307; az After_Soft_Dotted; # COMBINING DOT ABOVE
* For ICU 2.2 I am withdrawing this "fix" to make ICU conform to Unicode 3.2.
*
* Markus W. Scherer 2002-jun-07
*/
/* Is preceded by base character 'I' with no intervening cc=230 ? */
static UBool
isAfter_I(UCharIterator *iter, int32_t index) {
int32_t c;
uint8_t cc;
if(iter==NULL) {
return FALSE;
}
iter->move(iter, index, UITER_ZERO);
for(;;) {
c=uiter_previous32(iter);
if(c<0) {
break;
}
if(c==0x49) {
return TRUE; /* preceded by I */
}
cc=u_getCombiningClass(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 */
}
#endif
/* Is followed by one or more cc==230 ? */
static UBool
isFollowedByMoreAbove(UCharIterator *iter, int32_t index) {
int32_t c;
uint8_t cc;
if(iter==NULL) {
return FALSE;
}
iter->move(iter, index, UITER_ZERO);
for(;;) {
c=uiter_next32(iter);
if(c<0) {
break;
}
cc=u_getCombiningClass(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(UCharIterator *iter, int32_t index) {
int32_t c;
uint8_t cc;
if(iter==NULL) {
return FALSE;
}
iter->move(iter, index, UITER_ZERO);
for(;;) {
c=uiter_next32(iter);
if(c<0) {
break;
}
if(c==0x307) {
return TRUE;
}
cc=u_getCombiningClass(c);
if(cc==0 || cc==230) {
return FALSE; /* next base character or cc==230 in between */
}
}
return FALSE; /* no dot above following */
}
/* lowercasing -------------------------------------------------------------- */
/* internal, see ustr_imp.h */
U_CAPI int32_t U_EXPORT2
u_internalToLower(UChar32 c, UCharIterator *iter,
UChar *dest, int32_t destCapacity,
const char *locale) {
UChar buffer[8];
uint32_t props;
UChar32 result;
int32_t i, length;
result=c;
GET_PROPS(c, props);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if((1UL<<GET_CATEGORY(props))&(1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
result=c+GET_SIGNED_VALUE(props);
}
} else {
const UChar *u;
const uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe, specialCasing;
int32_t minLength;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_SPECIAL_CASING)) {
i=EXC_SPECIAL_CASING;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
specialCasing=*pe;
/* fill u and length with the case mapping result string */
if(specialCasing&0x80000000) {
/* use hardcoded conditions and mappings */
int32_t loc=getCaseLocale(locale),
srcIndex= iter!=NULL ? iter->getIndex(iter, UITER_CURRENT) : 0;
/*
* Test for conditional mappings first
* (otherwise the unconditional default mappings are always taken),
* then test for characters that have unconditional mappings in SpecialCasing.txt,
* then get the UnicodeData.txt mappings.
*/
if( loc==LOC_LITHUANIAN &&
/* base characters, find accents above */
(((c==0x49 || c==0x4a || c==0x12e) &&
isFollowedByMoreAbove(iter, srcIndex)) ||
/* precomposed with accent above, no need to find one */
(c==0xcc || c==0xcd || c==0x128))
) {
/*
# Lithuanian
# Lithuanian retains the dot in a lowercase i when followed by accents.
# Introduce an explicit dot above when lowercasing capital I's and J's
# whenever there are more accents above.
# (of the accents used in Lithuanian: grave, acute, tilde above, and ogonek)
0049; 0069 0307; 0049; 0049; lt More_Above; # LATIN CAPITAL LETTER I
004A; 006A 0307; 004A; 004A; lt More_Above; # LATIN CAPITAL LETTER J
012E; 012F 0307; 012E; 012E; lt More_Above; # LATIN CAPITAL LETTER I WITH OGONEK
00CC; 0069 0307 0300; 00CC; 00CC; lt; # LATIN CAPITAL LETTER I WITH GRAVE
00CD; 0069 0307 0301; 00CD; 00CD; lt; # LATIN CAPITAL LETTER I WITH ACUTE
0128; 0069 0307 0303; 0128; 0128; lt; # LATIN CAPITAL LETTER I WITH TILDE
*/
u=buffer;
buffer[1]=0x307;
switch(c) {
case 0x49: /* LATIN CAPITAL LETTER I */
buffer[0]=0x69;
length=2;
break;
case 0x4a: /* LATIN CAPITAL LETTER J */
buffer[0]=0x6a;
length=2;
break;
case 0x12e: /* LATIN CAPITAL LETTER I WITH OGONEK */
buffer[0]=0x12f;
length=2;
break;
case 0xcc: /* LATIN CAPITAL LETTER I WITH GRAVE */
buffer[0]=0x69;
buffer[2]=0x300;
length=3;
break;
case 0xcd: /* LATIN CAPITAL LETTER I WITH ACUTE */
buffer[0]=0x69;
buffer[2]=0x301;
length=3;
break;
case 0x128: /* LATIN CAPITAL LETTER I WITH TILDE */
buffer[0]=0x69;
buffer[2]=0x303;
length=3;
break;
default:
return 0; /* will not occur */
}
/* # Turkish and Azeri */
} else if(loc==LOC_TURKISH && c==0x130) {
/*
# I and i-dotless; I-dot and i are case pairs in Turkish and Azeri
# The following rules handle those cases.
0130; 0069; 0130; 0130; tr # LATIN CAPITAL LETTER I WITH DOT ABOVE
0130; 0069; 0130; 0130; az # LATIN CAPITAL LETTER I WITH DOT ABOVE
*/
result=0x69;
goto single;
} else if(loc==LOC_TURKISH && c==0x307 && isPrecededBySoftDotted(iter, srcIndex-1)) {
/* ### TODO see comment above about isAfter_I() */
/*
# When lowercasing, remove dot_above in the sequence I + dot_above, which will turn into i.
# This matches the behavior of the canonically equivalent I-dot_above
0307; ; 0307; 0307; tr After_Soft_Dotted; # COMBINING DOT ABOVE
0307; ; 0307; 0307; az After_Soft_Dotted; # COMBINING DOT ABOVE
*/
return 0; /* remove the dot (continue without output) */
} else if(loc==LOC_TURKISH && c==0x49 && !isFollowedByDotAbove(iter, srcIndex)) {
/*
# When lowercasing, unless an I is before a dot_above, it turns into a dotless i.
0049; 0131; 0049; 0049; tr Not_Before_Dot; # LATIN CAPITAL LETTER I
0049; 0131; 0049; 0049; az Not_Before_Dot; # LATIN CAPITAL LETTER I
*/
result=0x131;
goto single;
} else if(c==0x130) {
/*
# Preserve canonical equivalence for I with dot. Turkic is handled below.
0130; 0069 0307; 0130; 0130; # LATIN CAPITAL LETTER I WITH DOT ABOVE
*/
static const UChar iWithDot[2]={ 0x69, 0x307 };
u=iWithDot;
length=2;
} else if( c==0x3a3 &&
!isFollowedByCasedLetter(iter, srcIndex) &&
isPrecededByCasedLetter(iter, srcIndex-1)
) {
/* greek capital sigma maps depending on surrounding cased letters (see SpecialCasing.txt) */
/*
# Special case for final form of sigma
03A3; 03C2; 03A3; 03A3; Final_Sigma; # GREEK CAPITAL LETTER SIGMA
*/
result=0x3c2; /* greek small final sigma */
goto single;
} 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);
length=(int32_t)((*u++)&0x1f);
}
/* copy the result string */
minLength = (length < destCapacity) ? length : destCapacity;
i=0;
while(i<minLength) {
dest[i++]=*u++;
}
return length;
}
notSpecial:
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_LOWERCASE)) {
i=EXC_LOWERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
result=(UChar32)*pe;
}
}
single:
length=UTF_CHAR_LENGTH(result);
if(length<=destCapacity) {
/* write result to dest */
i=0;
UTF_APPEND_CHAR_UNSAFE(dest, i, result);
}
return (result==c) ? -length : length;
}
/*
* Lowercases [srcStart..srcLimit[ but takes
* context [0..srcLength[ into account.
*/
U_CFUNC int32_t
u_internalStrToLower(UChar *dest, int32_t destCapacity,
const UChar *src, int32_t srcLength,
int32_t srcStart, int32_t srcLimit,
const char *locale,
UErrorCode *pErrorCode) {
UCharIterator iter;
uint32_t props;
int32_t srcIndex, destIndex;
UChar32 c;
/* test early, once, if there is a data file */
if(!HAVE_DATA) {
*pErrorCode=U_FILE_ACCESS_ERROR;
return 0;
}
/* set up local variables */
uiter_setString(&iter, src, srcLength);
/* case mapping loop */
srcIndex=srcStart;
destIndex=0;
while(srcIndex<srcLimit) {
UTF_NEXT_CHAR(src, srcIndex, srcLimit, c);
GET_PROPS_UNSAFE(c, props);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if((1UL<<GET_CATEGORY(props))&(1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
c+=GET_SIGNED_VALUE(props);
}
/* handle 1:1 code point mappings from UnicodeData.txt */
if(c<=0xffff) {
if(destIndex<destCapacity) {
dest[destIndex++]=(UChar)c;
} else {
/* buffer overflow */
/* keep incrementing the destIndex for preflighting */
++destIndex;
}
} else {
if((destIndex+2)<=destCapacity) {
dest[destIndex++]=UTF16_LEAD(c);
dest[destIndex++]=UTF16_TRAIL(c);
} else {
/* buffer overflow */
/* write the first surrogate if possible */
if(destIndex<destCapacity) {
dest[destIndex]=UTF16_LEAD(c);
}
/* keep incrementing the destIndex for preflighting */
destIndex+=2;
}
}
} else {
/* handle all exceptions in u_internalToLower() */
int32_t length;
iter.move(&iter, srcIndex, UITER_ZERO);
if(destIndex<destCapacity) {
length=u_internalToLower(c, &iter, dest+destIndex, destCapacity-destIndex, locale);
} else {
length=u_internalToLower(c, &iter, NULL, 0, locale);
}
if(length<0) {
length=-length;
}
destIndex+=length;
}
}
if(destIndex>destCapacity) {
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
return destIndex;
}
/* uppercasing -------------------------------------------------------------- */
/* internal */
static int32_t
u_internalToUpperOrTitle(UChar32 c, UCharIterator *iter,
UChar *dest, int32_t destCapacity,
const char *locale,
UBool upperNotTitle) {
uint32_t props;
UChar32 result;
int32_t i, length;
result=c;
GET_PROPS(c, props);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if(GET_CATEGORY(props)==U_LOWERCASE_LETTER) {
result=c-GET_SIGNED_VALUE(props);
}
} else {
const UChar *u;
const uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe, specialCasing;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_SPECIAL_CASING)) {
i=EXC_SPECIAL_CASING;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
specialCasing=*pe;
/* fill u and length with the case mapping result string */
if(specialCasing&0x80000000) {
/* use hardcoded conditions and mappings */
int32_t loc=getCaseLocale(locale),
srcIndex= iter!=NULL ? iter->getIndex(iter, UITER_CURRENT) : 0;
if(loc==LOC_TURKISH && c==0x69) {
/*
# Turkish and Azeri
# I and i-dotless; I-dot and i are case pairs in Turkish and Azeri
# The following rules handle those cases.
# When uppercasing, i turns into a dotted capital I
0069; 0069; 0130; 0130; tr; # LATIN SMALL LETTER I
0069; 0069; 0130; 0130; az; # LATIN SMALL LETTER I
*/
result=0x130;
goto single;
} else if(loc==LOC_LITHUANIAN && c==0x307 && isPrecededBySoftDotted(iter, srcIndex-1)) {
/*
# Lithuanian
# Lithuanian retains the dot in a lowercase i when followed by accents.
# Remove DOT ABOVE after "i" with upper or titlecase
0307; 0307; ; ; lt After_Soft_Dotted; # COMBINING DOT ABOVE
*/
return 0; /* 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);
length=(int32_t)*u++;
/* skip the lowercase result string */
u+=length&0x1f;
if(upperNotTitle) {
length=(length>>5)&0x1f;
} else {
/* skip the uppercase result strings too */
u+=(length>>5)&0x1f;
length=(length>>10)&0x1f;
}
}
/* copy the result string */
i=0;
while(i<length && i<destCapacity) {
dest[i++]=*u++;
}
return length;
}
notSpecial:
if(!upperNotTitle && HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_TITLECASE)) {
i=EXC_TITLECASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
result=(UChar32)*pe;
} else if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_UPPERCASE)) {
/* here, titlecase is same as uppercase */
i=EXC_UPPERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
result=(UChar32)*pe;
}
}
single:
length=UTF_CHAR_LENGTH(result);
if(length<=destCapacity) {
/* write result to dest */
i=0;
UTF_APPEND_CHAR_UNSAFE(dest, i, result);
}
return (result==c) ? -length : length;
}
/* internal, see ustr_imp.h */
U_CAPI int32_t U_EXPORT2
u_internalToUpper(UChar32 c, UCharIterator *iter,
UChar *dest, int32_t destCapacity,
const char *locale) {
return u_internalToUpperOrTitle(c, iter, dest, destCapacity, locale, TRUE);
}
U_CFUNC int32_t
u_internalStrToUpper(UChar *dest, int32_t destCapacity,
const UChar *src, int32_t srcLength,
const char *locale,
UErrorCode *pErrorCode) {
UCharIterator iter;
uint32_t props;
int32_t srcIndex, destIndex;
UChar32 c;
/* test early, once, if there is a data file */
if(!HAVE_DATA) {
*pErrorCode=U_FILE_ACCESS_ERROR;
return 0;
}
/* set up local variables */
uiter_setString(&iter, src, srcLength);
/* case mapping loop */
srcIndex=destIndex=0;
while(srcIndex<srcLength) {
UTF_NEXT_CHAR(src, srcIndex, srcLength, c);
GET_PROPS_UNSAFE(c, props);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if(GET_CATEGORY(props)==U_LOWERCASE_LETTER) {
c-=GET_SIGNED_VALUE(props);
}
/* handle 1:1 code point mappings from UnicodeData.txt */
if(c<=0xffff) {
if(destIndex<destCapacity) {
dest[destIndex++]=(UChar)c;
} else {
/* buffer overflow */
/* keep incrementing the destIndex for preflighting */
++destIndex;
}
} else {
if((destIndex+2)<=destCapacity) {
dest[destIndex++]=UTF16_LEAD(c);
dest[destIndex++]=UTF16_TRAIL(c);
} else {
/* buffer overflow */
/* write the first surrogate if possible */
if(destIndex<destCapacity) {
dest[destIndex]=UTF16_LEAD(c);
}
/* keep incrementing the destIndex for preflighting */
destIndex+=2;
}
}
} else {
/* handle all exceptions in u_internalToUpper() */
int32_t length;
iter.move(&iter, srcIndex, UITER_ZERO);
if(destIndex<destCapacity) {
length=u_internalToUpperOrTitle(c, &iter, dest+destIndex, destCapacity-destIndex, locale, TRUE);
} else {
length=u_internalToUpperOrTitle(c, &iter, NULL, 0, locale, TRUE);
}
if(length<0) {
length=-length;
}
destIndex+=length;
}
}
if(destIndex>destCapacity) {
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
return destIndex;
}
/* titlecasing -------------------------------------------------------------- */
/* internal, see ustr_imp.h */
U_CAPI int32_t U_EXPORT2
u_internalToTitle(UChar32 c, UCharIterator *iter,
UChar *dest, int32_t destCapacity,
const char *locale) {
return u_internalToUpperOrTitle(c, iter, dest, destCapacity, locale, FALSE);
}
/* 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.
*
* Some special cases are hardcoded because their conditions cannot be
* parsed and processed from CaseFolding.txt.
*
* Unicode 3.2 CaseFolding.txt specifies for its status field:
# C: common case folding, common mappings shared by both simple and full mappings.
# F: full case folding, mappings that cause strings to grow in length. Multiple characters are separated by spaces.
# S: simple case folding, mappings to single characters where different from F.
# T: special case for uppercase I and dotted uppercase I
# - For non-Turkic languages, this mapping is normally not used.
# - For Turkic languages (tr, az), this mapping can be used instead of the normal mapping for these characters.
#
# Usage:
# A. To do a simple case folding, use the mappings with status C + S.
# B. To do a full case folding, use the mappings with status C + F.
#
# The mappings with status T can be used or omitted depending on the desired case-folding
# behavior. (The default option is to exclude them.)
* Unicode 3.2 has 'T' mappings as follows:
0049; T; 0131; # LATIN CAPITAL LETTER I
0130; T; 0069; # LATIN CAPITAL LETTER I WITH DOT ABOVE
* while the default mappings for these code points are:
0049; C; 0069; # LATIN CAPITAL LETTER I
0130; F; 0069 0307; # LATIN CAPITAL LETTER I WITH DOT ABOVE
* U+0130 is otherwise lowercased to U+0069 (UnicodeData.txt).
*
* In case this code is used with CaseFolding.txt from an older version of Unicode
* where CaseFolding.txt contains mappings with a status of 'I' that
* have the opposite polarity ('I' mappings are included by default but excluded for Turkic),
* we must also hardcode the Unicode 3.2 mappings for the code points
* with 'I' mappings.
* Unicode 3.1.1 has 'I' mappings for U+0130 and U+0131.
* Unicode 3.2 has a 'T' mapping for U+0130, and lowercases U+0131 to itself (see UnicodeData.txt).
*/
/* 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, props);
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 {
const uint32_t *pe=GET_EXCEPTIONS(props);
uint32_t firstExceptionValue=*pe;
if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_CASE_FOLDING)) {
const 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&_FOLD_CASE_OPTIONS_MASK)==U_FOLD_CASE_DEFAULT) {
/* default mappings */
if(c==0x49) {
/* 0049; C; 0069; # LATIN CAPITAL LETTER I */
return 0x69;
} else if(c==0x130) {
/* no simple default mapping for U+0130, use UnicodeData.txt */
return 0x69;
}
} else {
/* Turkic mappings */
if(c==0x49) {
/* 0049; T; 0131; # LATIN CAPITAL LETTER I */
return 0x131;
} else if(c==0x130) {
/* 0130; T; 0069; # LATIN CAPITAL LETTER I WITH DOT ABOVE */
return 0x69;
}
}
/* return c itself because there is no special mapping for it */
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, see ustr_imp.h */
U_CAPI int32_t U_EXPORT2
u_internalFoldCase(UChar32 c,
UChar *dest, int32_t destCapacity,
uint32_t options) {
uint32_t props;
UChar32 result;
int32_t i, length;
result=c;
GET_PROPS_UNSAFE(c, props);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if((1UL<<GET_CATEGORY(props))&(1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
/* same as lowercase */
result=c+GET_SIGNED_VALUE(props);
}
} else {
const 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;
int32_t minLength;
length=props>>24;
minLength = (length < destCapacity) ? length : destCapacity;
/* copy the result string */
i=0;
while(i<minLength) {
dest[i++]=*(uchars++);
}
return length;
} else {
/* special case folding mappings, hardcoded */
if((options&_FOLD_CASE_OPTIONS_MASK)==U_FOLD_CASE_DEFAULT) {
/* default mappings */
if(c==0x49) {
/* 0049; C; 0069; # LATIN CAPITAL LETTER I */
result=0x69;
} else if(c==0x130) {
/* 0130; F; 0069 0307; # LATIN CAPITAL LETTER I WITH DOT ABOVE */
if(0<destCapacity) {
dest[0]=0x69;
}
if(1<destCapacity) {
dest[1]=0x307;
}
return 2;
}
} else {
/* Turkic mappings */
if(c==0x49) {
/* 0049; T; 0131; # LATIN CAPITAL LETTER I */
result=0x131;
} else if(c==0x130) {
/* 0130; T; 0069; # LATIN CAPITAL LETTER I WITH DOT ABOVE */
result=0x69;
}
}
/* return c itself because there is no special mapping for it */
/* goto single; */
}
} else if(HAVE_EXCEPTION_VALUE(firstExceptionValue, EXC_LOWERCASE)) {
i=EXC_LOWERCASE;
++pe;
ADD_EXCEPTION_OFFSET(firstExceptionValue, i, pe);
result=(UChar32)*pe;
}
}
/* single: */
length=UTF_CHAR_LENGTH(result);
if(length<=destCapacity) {
/* write result to dest */
i=0;
UTF_APPEND_CHAR_UNSAFE(dest, i, result);
}
return (result==c) ? -length : length;
}
/* 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,
UErrorCode *pErrorCode) {
uint32_t props;
int32_t srcIndex, destIndex;
UChar32 c;
/* test early, once, if there is a data file */
if(!HAVE_DATA) {
*pErrorCode=U_FILE_ACCESS_ERROR;
return 0;
}
/* case mapping loop */
srcIndex=destIndex=0;
while(srcIndex<srcLength) {
UTF_NEXT_CHAR(src, srcIndex, srcLength, c);
GET_PROPS_UNSAFE(c, props);
if(!PROPS_VALUE_IS_EXCEPTION(props)) {
if((1UL<<GET_CATEGORY(props))&(1UL<<U_UPPERCASE_LETTER|1UL<<U_TITLECASE_LETTER)) {
c+=GET_SIGNED_VALUE(props);
}
/* handle 1:1 code point mappings from UnicodeData.txt */
if(c<=0xffff) {
if(destIndex<destCapacity) {
dest[destIndex++]=(UChar)c;
} else {
/* buffer overflow */
/* keep incrementing the destIndex for preflighting */
++destIndex;
}
} else {
if((destIndex+2)<=destCapacity) {
dest[destIndex++]=UTF16_LEAD(c);
dest[destIndex++]=UTF16_TRAIL(c);
} else {
/* buffer overflow */
/* write the first surrogate if possible */
if(destIndex<destCapacity) {
dest[destIndex]=UTF16_LEAD(c);
}
/* keep incrementing the destIndex for preflighting */
destIndex+=2;
}
}
} else {
/* handle all exceptions in u_internalFoldCase() */
int32_t length;
if(destIndex<destCapacity) {
length=u_internalFoldCase(c, dest+destIndex, destCapacity-destIndex, options);
} else {
length=u_internalFoldCase(c, NULL, 0, options);
}
if(length<0) {
length=-length;
}
destIndex+=length;
}
}
if(destIndex>destCapacity) {
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
return destIndex;
}
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