| // © 2016 and later: Unicode, Inc. and others. |
| // License & terms of use: http://www.unicode.org/copyright.html |
| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 2004-2014, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************* |
| * file name: ucase.cpp |
| * encoding: UTF-8 |
| * tab size: 8 (not used) |
| * indentation:4 |
| * |
| * created on: 2004aug30 |
| * created by: Markus W. Scherer |
| * |
| * Low-level Unicode character/string case mapping code. |
| * Much code moved here (and modified) from uchar.c. |
| */ |
| |
| #include "unicode/utypes.h" |
| #include "unicode/unistr.h" |
| #include "unicode/uset.h" |
| #include "unicode/udata.h" /* UDataInfo */ |
| #include "unicode/utf16.h" |
| #include "ucmndata.h" /* DataHeader */ |
| #include "udatamem.h" |
| #include "umutex.h" |
| #include "uassert.h" |
| #include "cmemory.h" |
| #include "utrie2.h" |
| #include "ucase.h" |
| |
| struct UCaseProps { |
| UDataMemory *mem; |
| const int32_t *indexes; |
| const uint16_t *exceptions; |
| const uint16_t *unfold; |
| |
| UTrie2 trie; |
| uint8_t formatVersion[4]; |
| }; |
| |
| /* ucase_props_data.h is machine-generated by gencase --csource */ |
| #define INCLUDED_FROM_UCASE_CPP |
| #include "ucase_props_data.h" |
| |
| /* set of property starts for UnicodeSet ------------------------------------ */ |
| |
| static UBool U_CALLCONV |
| _enumPropertyStartsRange(const void *context, UChar32 start, UChar32 /*end*/, uint32_t /*value*/) { |
| /* add the start code point to the USet */ |
| const USetAdder *sa=(const USetAdder *)context; |
| sa->add(sa->set, start); |
| return TRUE; |
| } |
| |
| U_CFUNC void U_EXPORT2 |
| ucase_addPropertyStarts(const USetAdder *sa, UErrorCode *pErrorCode) { |
| if(U_FAILURE(*pErrorCode)) { |
| return; |
| } |
| |
| /* add the start code point of each same-value range of the trie */ |
| utrie2_enum(&ucase_props_singleton.trie, NULL, _enumPropertyStartsRange, sa); |
| |
| /* add code points with hardcoded properties, plus the ones following them */ |
| |
| /* (none right now, see comment below) */ |
| |
| /* |
| * Omit code points with hardcoded specialcasing properties |
| * because we do not build property UnicodeSets for them right now. |
| */ |
| } |
| |
| /* data access primitives --------------------------------------------------- */ |
| |
| #define GET_EXCEPTIONS(csp, props) ((csp)->exceptions+((props)>>UCASE_EXC_SHIFT)) |
| |
| #define PROPS_HAS_EXCEPTION(props) ((props)&UCASE_EXCEPTION) |
| |
| /* number of bits in an 8-bit integer value */ |
| 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 HAS_SLOT(flags, idx) ((flags)&(1<<(idx))) |
| #define SLOT_OFFSET(flags, idx) flagsOffset[(flags)&((1<<(idx))-1)] |
| |
| /* |
| * Get the value of an optional-value slot where HAS_SLOT(excWord, idx). |
| * |
| * @param excWord (in) initial exceptions word |
| * @param idx (in) desired slot index |
| * @param pExc16 (in/out) const uint16_t * after excWord=*pExc16++; |
| * moved to the last uint16_t of the value, use +1 for beginning of next slot |
| * @param value (out) int32_t or uint32_t output if hasSlot, otherwise not modified |
| */ |
| #define GET_SLOT_VALUE(excWord, idx, pExc16, value) \ |
| if(((excWord)&UCASE_EXC_DOUBLE_SLOTS)==0) { \ |
| (pExc16)+=SLOT_OFFSET(excWord, idx); \ |
| (value)=*pExc16; \ |
| } else { \ |
| (pExc16)+=2*SLOT_OFFSET(excWord, idx); \ |
| (value)=*pExc16++; \ |
| (value)=((value)<<16)|*pExc16; \ |
| } |
| |
| /* simple case mappings ----------------------------------------------------- */ |
| |
| U_CAPI UChar32 U_EXPORT2 |
| ucase_tolower(UChar32 c) { |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| if(!PROPS_HAS_EXCEPTION(props)) { |
| if(UCASE_GET_TYPE(props)>=UCASE_UPPER) { |
| c+=UCASE_GET_DELTA(props); |
| } |
| } else { |
| const uint16_t *pe=GET_EXCEPTIONS(&ucase_props_singleton, props); |
| uint16_t excWord=*pe++; |
| if(HAS_SLOT(excWord, UCASE_EXC_LOWER)) { |
| GET_SLOT_VALUE(excWord, UCASE_EXC_LOWER, pe, c); |
| } |
| } |
| return c; |
| } |
| |
| U_CAPI UChar32 U_EXPORT2 |
| ucase_toupper(UChar32 c) { |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| if(!PROPS_HAS_EXCEPTION(props)) { |
| if(UCASE_GET_TYPE(props)==UCASE_LOWER) { |
| c+=UCASE_GET_DELTA(props); |
| } |
| } else { |
| const uint16_t *pe=GET_EXCEPTIONS(&ucase_props_singleton, props); |
| uint16_t excWord=*pe++; |
| if(HAS_SLOT(excWord, UCASE_EXC_UPPER)) { |
| GET_SLOT_VALUE(excWord, UCASE_EXC_UPPER, pe, c); |
| } |
| } |
| return c; |
| } |
| |
| U_CAPI UChar32 U_EXPORT2 |
| ucase_totitle(UChar32 c) { |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| if(!PROPS_HAS_EXCEPTION(props)) { |
| if(UCASE_GET_TYPE(props)==UCASE_LOWER) { |
| c+=UCASE_GET_DELTA(props); |
| } |
| } else { |
| const uint16_t *pe=GET_EXCEPTIONS(&ucase_props_singleton, props); |
| uint16_t excWord=*pe++; |
| int32_t idx; |
| if(HAS_SLOT(excWord, UCASE_EXC_TITLE)) { |
| idx=UCASE_EXC_TITLE; |
| } else if(HAS_SLOT(excWord, UCASE_EXC_UPPER)) { |
| idx=UCASE_EXC_UPPER; |
| } else { |
| return c; |
| } |
| GET_SLOT_VALUE(excWord, idx, pe, c); |
| } |
| return c; |
| } |
| |
| static const UChar iDot[2] = { 0x69, 0x307 }; |
| static const UChar jDot[2] = { 0x6a, 0x307 }; |
| static const UChar iOgonekDot[3] = { 0x12f, 0x307 }; |
| static const UChar iDotGrave[3] = { 0x69, 0x307, 0x300 }; |
| static const UChar iDotAcute[3] = { 0x69, 0x307, 0x301 }; |
| static const UChar iDotTilde[3] = { 0x69, 0x307, 0x303 }; |
| |
| |
| U_CFUNC void U_EXPORT2 |
| ucase_addCaseClosure(UChar32 c, const USetAdder *sa) { |
| uint16_t props; |
| |
| /* |
| * Hardcode the case closure of i and its relatives and ignore the |
| * data file data for these characters. |
| * The Turkic dotless i and dotted I with their case mapping conditions |
| * and case folding option make the related characters behave specially. |
| * This code matches their closure behavior to their case folding behavior. |
| */ |
| |
| switch(c) { |
| case 0x49: |
| /* regular i and I are in one equivalence class */ |
| sa->add(sa->set, 0x69); |
| return; |
| case 0x69: |
| sa->add(sa->set, 0x49); |
| return; |
| case 0x130: |
| /* dotted I is in a class with <0069 0307> (for canonical equivalence with <0049 0307>) */ |
| sa->addString(sa->set, iDot, 2); |
| return; |
| case 0x131: |
| /* dotless i is in a class by itself */ |
| return; |
| default: |
| /* otherwise use the data file data */ |
| break; |
| } |
| |
| props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| if(!PROPS_HAS_EXCEPTION(props)) { |
| if(UCASE_GET_TYPE(props)!=UCASE_NONE) { |
| /* add the one simple case mapping, no matter what type it is */ |
| int32_t delta=UCASE_GET_DELTA(props); |
| if(delta!=0) { |
| sa->add(sa->set, c+delta); |
| } |
| } |
| } else { |
| /* |
| * c has exceptions, so there may be multiple simple and/or |
| * full case mappings. Add them all. |
| */ |
| const uint16_t *pe0, *pe=GET_EXCEPTIONS(&ucase_props_singleton, props); |
| const UChar *closure; |
| uint16_t excWord=*pe++; |
| int32_t idx, closureLength, fullLength, length; |
| |
| pe0=pe; |
| |
| /* add all simple case mappings */ |
| for(idx=UCASE_EXC_LOWER; idx<=UCASE_EXC_TITLE; ++idx) { |
| if(HAS_SLOT(excWord, idx)) { |
| pe=pe0; |
| GET_SLOT_VALUE(excWord, idx, pe, c); |
| sa->add(sa->set, c); |
| } |
| } |
| |
| /* get the closure string pointer & length */ |
| if(HAS_SLOT(excWord, UCASE_EXC_CLOSURE)) { |
| pe=pe0; |
| GET_SLOT_VALUE(excWord, UCASE_EXC_CLOSURE, pe, closureLength); |
| closureLength&=UCASE_CLOSURE_MAX_LENGTH; /* higher bits are reserved */ |
| closure=(const UChar *)pe+1; /* behind this slot, unless there are full case mappings */ |
| } else { |
| closureLength=0; |
| closure=NULL; |
| } |
| |
| /* add the full case folding */ |
| if(HAS_SLOT(excWord, UCASE_EXC_FULL_MAPPINGS)) { |
| pe=pe0; |
| GET_SLOT_VALUE(excWord, UCASE_EXC_FULL_MAPPINGS, pe, fullLength); |
| |
| /* start of full case mapping strings */ |
| ++pe; |
| |
| fullLength&=0xffff; /* bits 16 and higher are reserved */ |
| |
| /* skip the lowercase result string */ |
| pe+=fullLength&UCASE_FULL_LOWER; |
| fullLength>>=4; |
| |
| /* add the full case folding string */ |
| length=fullLength&0xf; |
| if(length!=0) { |
| sa->addString(sa->set, (const UChar *)pe, length); |
| pe+=length; |
| } |
| |
| /* skip the uppercase and titlecase strings */ |
| fullLength>>=4; |
| pe+=fullLength&0xf; |
| fullLength>>=4; |
| pe+=fullLength; |
| |
| closure=(const UChar *)pe; /* behind full case mappings */ |
| } |
| |
| /* add each code point in the closure string */ |
| for(idx=0; idx<closureLength;) { |
| U16_NEXT_UNSAFE(closure, idx, c); |
| sa->add(sa->set, c); |
| } |
| } |
| } |
| |
| /* |
| * compare s, which has a length, with t, which has a maximum length or is NUL-terminated |
| * must be length>0 and max>0 and length<=max |
| */ |
| static inline int32_t |
| strcmpMax(const UChar *s, int32_t length, const UChar *t, int32_t max) { |
| int32_t c1, c2; |
| |
| max-=length; /* we require length<=max, so no need to decrement max in the loop */ |
| do { |
| c1=*s++; |
| c2=*t++; |
| if(c2==0) { |
| return 1; /* reached the end of t but not of s */ |
| } |
| c1-=c2; |
| if(c1!=0) { |
| return c1; /* return difference result */ |
| } |
| } while(--length>0); |
| /* ends with length==0 */ |
| |
| if(max==0 || *t==0) { |
| return 0; /* equal to length of both strings */ |
| } else { |
| return -max; /* return lengh difference */ |
| } |
| } |
| |
| U_CFUNC UBool U_EXPORT2 |
| ucase_addStringCaseClosure(const UChar *s, int32_t length, const USetAdder *sa) { |
| int32_t i, start, limit, result, unfoldRows, unfoldRowWidth, unfoldStringWidth; |
| |
| if(ucase_props_singleton.unfold==NULL || s==NULL) { |
| return FALSE; /* no reverse case folding data, or no string */ |
| } |
| if(length<=1) { |
| /* the string is too short to find any match */ |
| /* |
| * more precise would be: |
| * if(!u_strHasMoreChar32Than(s, length, 1)) |
| * but this does not make much practical difference because |
| * a single supplementary code point would just not be found |
| */ |
| return FALSE; |
| } |
| |
| const uint16_t *unfold=ucase_props_singleton.unfold; |
| unfoldRows=unfold[UCASE_UNFOLD_ROWS]; |
| unfoldRowWidth=unfold[UCASE_UNFOLD_ROW_WIDTH]; |
| unfoldStringWidth=unfold[UCASE_UNFOLD_STRING_WIDTH]; |
| unfold+=unfoldRowWidth; |
| |
| if(length>unfoldStringWidth) { |
| /* the string is too long to find any match */ |
| return FALSE; |
| } |
| |
| /* do a binary search for the string */ |
| start=0; |
| limit=unfoldRows; |
| while(start<limit) { |
| i=(start+limit)/2; |
| const UChar *p=reinterpret_cast<const UChar *>(unfold+(i*unfoldRowWidth)); |
| result=strcmpMax(s, length, p, unfoldStringWidth); |
| |
| if(result==0) { |
| /* found the string: add each code point, and its case closure */ |
| UChar32 c; |
| |
| for(i=unfoldStringWidth; i<unfoldRowWidth && p[i]!=0;) { |
| U16_NEXT_UNSAFE(p, i, c); |
| sa->add(sa->set, c); |
| ucase_addCaseClosure(c, sa); |
| } |
| return TRUE; |
| } else if(result<0) { |
| limit=i; |
| } else /* result>0 */ { |
| start=i+1; |
| } |
| } |
| |
| return FALSE; /* string not found */ |
| } |
| |
| U_NAMESPACE_BEGIN |
| |
| FullCaseFoldingIterator::FullCaseFoldingIterator() |
| : unfold(reinterpret_cast<const UChar *>(ucase_props_singleton.unfold)), |
| unfoldRows(unfold[UCASE_UNFOLD_ROWS]), |
| unfoldRowWidth(unfold[UCASE_UNFOLD_ROW_WIDTH]), |
| unfoldStringWidth(unfold[UCASE_UNFOLD_STRING_WIDTH]), |
| currentRow(0), |
| rowCpIndex(unfoldStringWidth) { |
| unfold+=unfoldRowWidth; |
| } |
| |
| UChar32 |
| FullCaseFoldingIterator::next(UnicodeString &full) { |
| // Advance past the last-delivered code point. |
| const UChar *p=unfold+(currentRow*unfoldRowWidth); |
| if(rowCpIndex>=unfoldRowWidth || p[rowCpIndex]==0) { |
| ++currentRow; |
| p+=unfoldRowWidth; |
| rowCpIndex=unfoldStringWidth; |
| } |
| if(currentRow>=unfoldRows) { return U_SENTINEL; } |
| // Set "full" to the NUL-terminated string in the first unfold column. |
| int32_t length=unfoldStringWidth; |
| while(length>0 && p[length-1]==0) { --length; } |
| full.setTo(FALSE, p, length); |
| // Return the code point. |
| UChar32 c; |
| U16_NEXT_UNSAFE(p, rowCpIndex, c); |
| return c; |
| } |
| |
| U_NAMESPACE_END |
| |
| /** @return UCASE_NONE, UCASE_LOWER, UCASE_UPPER, UCASE_TITLE */ |
| U_CAPI int32_t U_EXPORT2 |
| ucase_getType(UChar32 c) { |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| return UCASE_GET_TYPE(props); |
| } |
| |
| /** @return same as ucase_getType() and set bit 2 if c is case-ignorable */ |
| U_CAPI int32_t U_EXPORT2 |
| ucase_getTypeOrIgnorable(UChar32 c) { |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| return UCASE_GET_TYPE_AND_IGNORABLE(props); |
| } |
| |
| /** @return UCASE_NO_DOT, UCASE_SOFT_DOTTED, UCASE_ABOVE, UCASE_OTHER_ACCENT */ |
| static inline int32_t |
| getDotType(UChar32 c) { |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| if(!PROPS_HAS_EXCEPTION(props)) { |
| return props&UCASE_DOT_MASK; |
| } else { |
| const uint16_t *pe=GET_EXCEPTIONS(&ucase_props_singleton, props); |
| return (*pe>>UCASE_EXC_DOT_SHIFT)&UCASE_DOT_MASK; |
| } |
| } |
| |
| U_CAPI UBool U_EXPORT2 |
| ucase_isSoftDotted(UChar32 c) { |
| return (UBool)(getDotType(c)==UCASE_SOFT_DOTTED); |
| } |
| |
| U_CAPI UBool U_EXPORT2 |
| ucase_isCaseSensitive(UChar32 c) { |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| return (UBool)((props&UCASE_SENSITIVE)!=0); |
| } |
| |
| /* string casing ------------------------------------------------------------ */ |
| |
| /* |
| * These internal functions form the core of string case mappings. |
| * They map single code points to result code points or strings and take |
| * all necessary conditions (context, locale ID, options) into account. |
| * |
| * They do not iterate over the source or write to the destination |
| * so that the same functions are useful for non-standard string storage, |
| * such as in a Replaceable (for Transliterator) or UTF-8/32 strings etc. |
| * For the same reason, the "surrounding text" context is passed in as a |
| * UCaseContextIterator which does not make any assumptions about |
| * the underlying storage. |
| * |
| * This section contains helper functions that check for conditions |
| * in the input text surrounding the current code point |
| * according to SpecialCasing.txt. |
| * |
| * 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. |
| * |
| * The erratum from 2002-10-31 adds the condition |
| * |
| * After_I |
| * The last preceding base character was an uppercase I, and there is no |
| * intervening combining character class 230 (ABOVE). |
| * |
| * (See Jitterbug 2344 and the comments on After_I below.) |
| * |
| * 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. |
| */ |
| |
| #define is_d(c) ((c)=='d' || (c)=='D') |
| #define is_e(c) ((c)=='e' || (c)=='E') |
| #define is_i(c) ((c)=='i' || (c)=='I') |
| #define is_l(c) ((c)=='l' || (c)=='L') |
| #define is_r(c) ((c)=='r' || (c)=='R') |
| #define is_t(c) ((c)=='t' || (c)=='T') |
| #define is_u(c) ((c)=='u' || (c)=='U') |
| #define is_z(c) ((c)=='z' || (c)=='Z') |
| |
| /* separator? */ |
| #define is_sep(c) ((c)=='_' || (c)=='-' || (c)==0) |
| |
| /** |
| * Requires non-NULL locale ID but otherwise does the equivalent of |
| * checking for language codes as if uloc_getLanguage() were called: |
| * Accepts both 2- and 3-letter codes and accepts case variants. |
| */ |
| U_CFUNC int32_t |
| ucase_getCaseLocale(const char *locale) { |
| /* |
| * This function used to use uloc_getLanguage(), but the current code |
| * removes the dependency of this low-level code on uloc implementation code |
| * and is faster because not the whole locale ID has to be |
| * examined and copied/transformed. |
| * |
| * Because this code does not want to depend on uloc, the caller must |
| * pass in a non-NULL locale, i.e., may need to call uloc_getDefault(). |
| */ |
| char c=*locale++; |
| // Fastpath for English "en" which is often used for default (=root locale) case mappings, |
| // and for Chinese "zh": Very common but no special case mapping behavior. |
| // Then check lowercase vs. uppercase to reduce the number of comparisons |
| // for other locales without special behavior. |
| if(c=='e') { |
| /* el or ell? */ |
| c=*locale++; |
| if(is_l(c)) { |
| c=*locale++; |
| if(is_l(c)) { |
| c=*locale; |
| } |
| if(is_sep(c)) { |
| return UCASE_LOC_GREEK; |
| } |
| } |
| // en, es, ... -> root |
| } else if(c=='z') { |
| return UCASE_LOC_ROOT; |
| #if U_CHARSET_FAMILY==U_ASCII_FAMILY |
| } else if(c>='a') { // ASCII a-z = 0x61..0x7a, after A-Z |
| #elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY |
| } else if(c<='z') { // EBCDIC a-z = 0x81..0xa9 with two gaps, before A-Z |
| #else |
| # error Unknown charset family! |
| #endif |
| // lowercase c |
| if(c=='t') { |
| /* tr or tur? */ |
| c=*locale++; |
| if(is_u(c)) { |
| c=*locale++; |
| } |
| if(is_r(c)) { |
| c=*locale; |
| if(is_sep(c)) { |
| return UCASE_LOC_TURKISH; |
| } |
| } |
| } else if(c=='a') { |
| /* az or aze? */ |
| c=*locale++; |
| if(is_z(c)) { |
| c=*locale++; |
| if(is_e(c)) { |
| c=*locale; |
| } |
| if(is_sep(c)) { |
| return UCASE_LOC_TURKISH; |
| } |
| } |
| } else if(c=='l') { |
| /* lt or lit? */ |
| c=*locale++; |
| if(is_i(c)) { |
| c=*locale++; |
| } |
| if(is_t(c)) { |
| c=*locale; |
| if(is_sep(c)) { |
| return UCASE_LOC_LITHUANIAN; |
| } |
| } |
| } else if(c=='n') { |
| /* nl or nld? */ |
| c=*locale++; |
| if(is_l(c)) { |
| c=*locale++; |
| if(is_d(c)) { |
| c=*locale; |
| } |
| if(is_sep(c)) { |
| return UCASE_LOC_DUTCH; |
| } |
| } |
| } |
| } else { |
| // uppercase c |
| // Same code as for lowercase c but also check for 'E'. |
| if(c=='T') { |
| /* tr or tur? */ |
| c=*locale++; |
| if(is_u(c)) { |
| c=*locale++; |
| } |
| if(is_r(c)) { |
| c=*locale; |
| if(is_sep(c)) { |
| return UCASE_LOC_TURKISH; |
| } |
| } |
| } else if(c=='A') { |
| /* az or aze? */ |
| c=*locale++; |
| if(is_z(c)) { |
| c=*locale++; |
| if(is_e(c)) { |
| c=*locale; |
| } |
| if(is_sep(c)) { |
| return UCASE_LOC_TURKISH; |
| } |
| } |
| } else if(c=='L') { |
| /* lt or lit? */ |
| c=*locale++; |
| if(is_i(c)) { |
| c=*locale++; |
| } |
| if(is_t(c)) { |
| c=*locale; |
| if(is_sep(c)) { |
| return UCASE_LOC_LITHUANIAN; |
| } |
| } |
| } else if(c=='E') { |
| /* el or ell? */ |
| c=*locale++; |
| if(is_l(c)) { |
| c=*locale++; |
| if(is_l(c)) { |
| c=*locale; |
| } |
| if(is_sep(c)) { |
| return UCASE_LOC_GREEK; |
| } |
| } |
| } else if(c=='N') { |
| /* nl or nld? */ |
| c=*locale++; |
| if(is_l(c)) { |
| c=*locale++; |
| if(is_d(c)) { |
| c=*locale; |
| } |
| if(is_sep(c)) { |
| return UCASE_LOC_DUTCH; |
| } |
| } |
| } |
| } |
| return UCASE_LOC_ROOT; |
| } |
| |
| /* |
| * Is followed by |
| * {case-ignorable}* cased |
| * ? |
| * (dir determines looking forward/backward) |
| * If a character is case-ignorable, it is skipped regardless of whether |
| * it is also cased or not. |
| */ |
| static UBool |
| isFollowedByCasedLetter(UCaseContextIterator *iter, void *context, int8_t dir) { |
| UChar32 c; |
| |
| if(iter==NULL) { |
| return FALSE; |
| } |
| |
| for(/* dir!=0 sets direction */; (c=iter(context, dir))>=0; dir=0) { |
| int32_t type=ucase_getTypeOrIgnorable(c); |
| if(type&4) { |
| /* case-ignorable, continue with the loop */ |
| } else if(type!=UCASE_NONE) { |
| return TRUE; /* followed by cased letter */ |
| } else { |
| return FALSE; /* uncased and not case-ignorable */ |
| } |
| } |
| |
| return FALSE; /* not followed by cased letter */ |
| } |
| |
| /* Is preceded by Soft_Dotted character with no intervening cc=230 ? */ |
| static UBool |
| isPrecededBySoftDotted(UCaseContextIterator *iter, void *context) { |
| UChar32 c; |
| int32_t dotType; |
| int8_t dir; |
| |
| if(iter==NULL) { |
| return FALSE; |
| } |
| |
| for(dir=-1; (c=iter(context, dir))>=0; dir=0) { |
| dotType=getDotType(c); |
| if(dotType==UCASE_SOFT_DOTTED) { |
| return TRUE; /* preceded by TYPE_i */ |
| } else if(dotType!=UCASE_OTHER_ACCENT) { |
| return FALSE; /* preceded by different base character (not TYPE_i), or intervening cc==230 */ |
| } |
| } |
| |
| return FALSE; /* not preceded by TYPE_i */ |
| } |
| |
| /* |
| * See Jitterbug 2344: |
| * The condition After_I for Turkic-lowercasing of U+0307 combining dot above |
| * is checked in ICU 2.0, 2.1, 2.6 but was not in 2.2 & 2.4 because |
| * we made those releases compatible with Unicode 3.2 which had not fixed |
| * a related bug in SpecialCasing.txt. |
| * |
| * From the Jitterbug 2344 text: |
| * ... this bug is listed as a Unicode erratum |
| * from 2002-10-31 at http://www.unicode.org/uni2errata/UnicodeErrata.html |
| * <quote> |
| * There are two errors in SpecialCasing.txt. |
| * 1. Missing semicolons on two lines. ... [irrelevant for ICU] |
| * 2. An incorrect context definition. Correct as follows: |
| * < 0307; ; 0307; 0307; tr After_Soft_Dotted; # COMBINING DOT ABOVE |
| * < 0307; ; 0307; 0307; az After_Soft_Dotted; # COMBINING DOT ABOVE |
| * --- |
| * > 0307; ; 0307; 0307; tr After_I; # COMBINING DOT ABOVE |
| * > 0307; ; 0307; 0307; az After_I; # COMBINING DOT ABOVE |
| * where the context After_I is defined as: |
| * The last preceding base character was an uppercase I, and there is no |
| * intervening combining character class 230 (ABOVE). |
| * </quote> |
| * |
| * Note that SpecialCasing.txt even in Unicode 3.2 described the condition as: |
| * |
| * # 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 |
| * |
| * See also the description in this place in older versions of uchar.c (revision 1.100). |
| * |
| * Markus W. Scherer 2003-feb-15 |
| */ |
| |
| /* Is preceded by base character 'I' with no intervening cc=230 ? */ |
| static UBool |
| isPrecededBy_I(UCaseContextIterator *iter, void *context) { |
| UChar32 c; |
| int32_t dotType; |
| int8_t dir; |
| |
| if(iter==NULL) { |
| return FALSE; |
| } |
| |
| for(dir=-1; (c=iter(context, dir))>=0; dir=0) { |
| if(c==0x49) { |
| return TRUE; /* preceded by I */ |
| } |
| dotType=getDotType(c); |
| if(dotType!=UCASE_OTHER_ACCENT) { |
| 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(UCaseContextIterator *iter, void *context) { |
| UChar32 c; |
| int32_t dotType; |
| int8_t dir; |
| |
| if(iter==NULL) { |
| return FALSE; |
| } |
| |
| for(dir=1; (c=iter(context, dir))>=0; dir=0) { |
| dotType=getDotType(c); |
| if(dotType==UCASE_ABOVE) { |
| return TRUE; /* at least one cc==230 following */ |
| } else if(dotType!=UCASE_OTHER_ACCENT) { |
| 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(UCaseContextIterator *iter, void *context) { |
| UChar32 c; |
| int32_t dotType; |
| int8_t dir; |
| |
| if(iter==NULL) { |
| return FALSE; |
| } |
| |
| for(dir=1; (c=iter(context, dir))>=0; dir=0) { |
| if(c==0x307) { |
| return TRUE; |
| } |
| dotType=getDotType(c); |
| if(dotType!=UCASE_OTHER_ACCENT) { |
| return FALSE; /* next base character or cc==230 in between */ |
| } |
| } |
| |
| return FALSE; /* no dot above following */ |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucase_toFullLower(UChar32 c, |
| UCaseContextIterator *iter, void *context, |
| const UChar **pString, |
| int32_t loc) { |
| // The sign of the result has meaning, input must be non-negative so that it can be returned as is. |
| U_ASSERT(c >= 0); |
| UChar32 result=c; |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| if(!PROPS_HAS_EXCEPTION(props)) { |
| if(UCASE_GET_TYPE(props)>=UCASE_UPPER) { |
| result=c+UCASE_GET_DELTA(props); |
| } |
| } else { |
| const uint16_t *pe=GET_EXCEPTIONS(&ucase_props_singleton, props), *pe2; |
| uint16_t excWord=*pe++; |
| int32_t full; |
| |
| pe2=pe; |
| |
| if(excWord&UCASE_EXC_CONDITIONAL_SPECIAL) { |
| /* use hardcoded conditions and mappings */ |
| |
| /* |
| * 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==UCASE_LOC_LITHUANIAN && |
| /* base characters, find accents above */ |
| (((c==0x49 || c==0x4a || c==0x12e) && |
| isFollowedByMoreAbove(iter, context)) || |
| /* 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 |
| */ |
| switch(c) { |
| case 0x49: /* LATIN CAPITAL LETTER I */ |
| *pString=iDot; |
| return 2; |
| case 0x4a: /* LATIN CAPITAL LETTER J */ |
| *pString=jDot; |
| return 2; |
| case 0x12e: /* LATIN CAPITAL LETTER I WITH OGONEK */ |
| *pString=iOgonekDot; |
| return 2; |
| case 0xcc: /* LATIN CAPITAL LETTER I WITH GRAVE */ |
| *pString=iDotGrave; |
| return 3; |
| case 0xcd: /* LATIN CAPITAL LETTER I WITH ACUTE */ |
| *pString=iDotAcute; |
| return 3; |
| case 0x128: /* LATIN CAPITAL LETTER I WITH TILDE */ |
| *pString=iDotTilde; |
| return 3; |
| default: |
| return 0; /* will not occur */ |
| } |
| /* # Turkish and Azeri */ |
| } else if(loc==UCASE_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 |
| */ |
| return 0x69; |
| } else if(loc==UCASE_LOC_TURKISH && c==0x307 && isPrecededBy_I(iter, context)) { |
| /* |
| # 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_I; # COMBINING DOT ABOVE |
| 0307; ; 0307; 0307; az After_I; # COMBINING DOT ABOVE |
| */ |
| *pString=nullptr; |
| return 0; /* remove the dot (continue without output) */ |
| } else if(loc==UCASE_LOC_TURKISH && c==0x49 && !isFollowedByDotAbove(iter, context)) { |
| /* |
| # 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 |
| */ |
| return 0x131; |
| } 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 |
| */ |
| *pString=iDot; |
| return 2; |
| } else if( c==0x3a3 && |
| !isFollowedByCasedLetter(iter, context, 1) && |
| isFollowedByCasedLetter(iter, context, -1) /* -1=preceded */ |
| ) { |
| /* 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 |
| */ |
| return 0x3c2; /* greek small final sigma */ |
| } else { |
| /* no known conditional special case mapping, use a normal mapping */ |
| } |
| } else if(HAS_SLOT(excWord, UCASE_EXC_FULL_MAPPINGS)) { |
| GET_SLOT_VALUE(excWord, UCASE_EXC_FULL_MAPPINGS, pe, full); |
| full&=UCASE_FULL_LOWER; |
| if(full!=0) { |
| /* set the output pointer to the lowercase mapping */ |
| *pString=reinterpret_cast<const UChar *>(pe+1); |
| |
| /* return the string length */ |
| return full; |
| } |
| } |
| |
| if(HAS_SLOT(excWord, UCASE_EXC_LOWER)) { |
| GET_SLOT_VALUE(excWord, UCASE_EXC_LOWER, pe2, result); |
| } |
| } |
| |
| return (result==c) ? ~result : result; |
| } |
| |
| /* internal */ |
| static int32_t |
| toUpperOrTitle(UChar32 c, |
| UCaseContextIterator *iter, void *context, |
| const UChar **pString, |
| int32_t loc, |
| UBool upperNotTitle) { |
| // The sign of the result has meaning, input must be non-negative so that it can be returned as is. |
| U_ASSERT(c >= 0); |
| UChar32 result=c; |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| if(!PROPS_HAS_EXCEPTION(props)) { |
| if(UCASE_GET_TYPE(props)==UCASE_LOWER) { |
| result=c+UCASE_GET_DELTA(props); |
| } |
| } else { |
| const uint16_t *pe=GET_EXCEPTIONS(&ucase_props_singleton, props), *pe2; |
| uint16_t excWord=*pe++; |
| int32_t full, idx; |
| |
| pe2=pe; |
| |
| if(excWord&UCASE_EXC_CONDITIONAL_SPECIAL) { |
| /* use hardcoded conditions and mappings */ |
| if(loc==UCASE_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 |
| */ |
| return 0x130; |
| } else if(loc==UCASE_LOC_LITHUANIAN && c==0x307 && isPrecededBySoftDotted(iter, context)) { |
| /* |
| # 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 |
| */ |
| *pString=nullptr; |
| return 0; /* remove the dot (continue without output) */ |
| } else { |
| /* no known conditional special case mapping, use a normal mapping */ |
| } |
| } else if(HAS_SLOT(excWord, UCASE_EXC_FULL_MAPPINGS)) { |
| GET_SLOT_VALUE(excWord, UCASE_EXC_FULL_MAPPINGS, pe, full); |
| |
| /* start of full case mapping strings */ |
| ++pe; |
| |
| /* skip the lowercase and case-folding result strings */ |
| pe+=full&UCASE_FULL_LOWER; |
| full>>=4; |
| pe+=full&0xf; |
| full>>=4; |
| |
| if(upperNotTitle) { |
| full&=0xf; |
| } else { |
| /* skip the uppercase result string */ |
| pe+=full&0xf; |
| full=(full>>4)&0xf; |
| } |
| |
| if(full!=0) { |
| /* set the output pointer to the result string */ |
| *pString=reinterpret_cast<const UChar *>(pe); |
| |
| /* return the string length */ |
| return full; |
| } |
| } |
| |
| if(!upperNotTitle && HAS_SLOT(excWord, UCASE_EXC_TITLE)) { |
| idx=UCASE_EXC_TITLE; |
| } else if(HAS_SLOT(excWord, UCASE_EXC_UPPER)) { |
| /* here, titlecase is same as uppercase */ |
| idx=UCASE_EXC_UPPER; |
| } else { |
| return ~c; |
| } |
| GET_SLOT_VALUE(excWord, idx, pe2, result); |
| } |
| |
| return (result==c) ? ~result : result; |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucase_toFullUpper(UChar32 c, |
| UCaseContextIterator *iter, void *context, |
| const UChar **pString, |
| int32_t caseLocale) { |
| return toUpperOrTitle(c, iter, context, pString, caseLocale, TRUE); |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucase_toFullTitle(UChar32 c, |
| UCaseContextIterator *iter, void *context, |
| const UChar **pString, |
| int32_t caseLocale) { |
| return toUpperOrTitle(c, iter, context, pString, caseLocale, 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 has no simple case folding (simple-case-folds to itself). |
| */ |
| |
| /* return the simple case folding mapping for c */ |
| U_CAPI UChar32 U_EXPORT2 |
| ucase_fold(UChar32 c, uint32_t options) { |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| if(!PROPS_HAS_EXCEPTION(props)) { |
| if(UCASE_GET_TYPE(props)>=UCASE_UPPER) { |
| c+=UCASE_GET_DELTA(props); |
| } |
| } else { |
| const uint16_t *pe=GET_EXCEPTIONS(&ucase_props_singleton, props); |
| uint16_t excWord=*pe++; |
| int32_t idx; |
| if(excWord&UCASE_EXC_CONDITIONAL_FOLD) { |
| /* 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 case folding for U+0130 */ |
| return c; |
| } |
| } 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; |
| } |
| } |
| } |
| if(HAS_SLOT(excWord, UCASE_EXC_FOLD)) { |
| idx=UCASE_EXC_FOLD; |
| } else if(HAS_SLOT(excWord, UCASE_EXC_LOWER)) { |
| idx=UCASE_EXC_LOWER; |
| } else { |
| return c; |
| } |
| GET_SLOT_VALUE(excWord, idx, pe, c); |
| } |
| return c; |
| } |
| |
| /* |
| * Issue for canonical caseless match (UAX #21): |
| * Turkic casefolding (using "T" mappings in CaseFolding.txt) does not preserve |
| * canonical equivalence, unlike default-option casefolding. |
| * For example, I-grave and I + grave fold to strings that are not canonically |
| * equivalent. |
| * For more details, see the comment in unorm_compare() in unorm.cpp |
| * and the intermediate prototype changes for Jitterbug 2021. |
| * (For example, revision 1.104 of uchar.c and 1.4 of CaseFolding.txt.) |
| * |
| * This did not get fixed because it appears that it is not possible to fix |
| * it for uppercase and lowercase characters (I-grave vs. i-grave) |
| * together in a way that they still fold to common result strings. |
| */ |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucase_toFullFolding(UChar32 c, |
| const UChar **pString, |
| uint32_t options) { |
| // The sign of the result has meaning, input must be non-negative so that it can be returned as is. |
| U_ASSERT(c >= 0); |
| UChar32 result=c; |
| uint16_t props=UTRIE2_GET16(&ucase_props_singleton.trie, c); |
| if(!PROPS_HAS_EXCEPTION(props)) { |
| if(UCASE_GET_TYPE(props)>=UCASE_UPPER) { |
| result=c+UCASE_GET_DELTA(props); |
| } |
| } else { |
| const uint16_t *pe=GET_EXCEPTIONS(&ucase_props_singleton, props), *pe2; |
| uint16_t excWord=*pe++; |
| int32_t full, idx; |
| |
| pe2=pe; |
| |
| if(excWord&UCASE_EXC_CONDITIONAL_FOLD) { |
| /* use hardcoded conditions and mappings */ |
| 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) { |
| /* 0130; F; 0069 0307; # LATIN CAPITAL LETTER I WITH DOT ABOVE */ |
| *pString=iDot; |
| return 2; |
| } |
| } 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; |
| } |
| } |
| } else if(HAS_SLOT(excWord, UCASE_EXC_FULL_MAPPINGS)) { |
| GET_SLOT_VALUE(excWord, UCASE_EXC_FULL_MAPPINGS, pe, full); |
| |
| /* start of full case mapping strings */ |
| ++pe; |
| |
| /* skip the lowercase result string */ |
| pe+=full&UCASE_FULL_LOWER; |
| full=(full>>4)&0xf; |
| |
| if(full!=0) { |
| /* set the output pointer to the result string */ |
| *pString=reinterpret_cast<const UChar *>(pe); |
| |
| /* return the string length */ |
| return full; |
| } |
| } |
| |
| if(HAS_SLOT(excWord, UCASE_EXC_FOLD)) { |
| idx=UCASE_EXC_FOLD; |
| } else if(HAS_SLOT(excWord, UCASE_EXC_LOWER)) { |
| idx=UCASE_EXC_LOWER; |
| } else { |
| return ~c; |
| } |
| GET_SLOT_VALUE(excWord, idx, pe2, result); |
| } |
| |
| return (result==c) ? ~result : result; |
| } |
| |
| /* case mapping properties API ---------------------------------------------- */ |
| |
| /* public API (see uchar.h) */ |
| |
| U_CAPI UBool U_EXPORT2 |
| u_isULowercase(UChar32 c) { |
| return (UBool)(UCASE_LOWER==ucase_getType(c)); |
| } |
| |
| U_CAPI UBool U_EXPORT2 |
| u_isUUppercase(UChar32 c) { |
| return (UBool)(UCASE_UPPER==ucase_getType(c)); |
| } |
| |
| /* Transforms the Unicode character to its lower case equivalent.*/ |
| U_CAPI UChar32 U_EXPORT2 |
| u_tolower(UChar32 c) { |
| return ucase_tolower(c); |
| } |
| |
| /* Transforms the Unicode character to its upper case equivalent.*/ |
| U_CAPI UChar32 U_EXPORT2 |
| u_toupper(UChar32 c) { |
| return ucase_toupper(c); |
| } |
| |
| /* Transforms the Unicode character to its title case equivalent.*/ |
| U_CAPI UChar32 U_EXPORT2 |
| u_totitle(UChar32 c) { |
| return ucase_totitle(c); |
| } |
| |
| /* return the simple case folding mapping for c */ |
| U_CAPI UChar32 U_EXPORT2 |
| u_foldCase(UChar32 c, uint32_t options) { |
| return ucase_fold(c, options); |
| } |
| |
| U_CFUNC int32_t U_EXPORT2 |
| ucase_hasBinaryProperty(UChar32 c, UProperty which) { |
| /* case mapping properties */ |
| const UChar *resultString; |
| switch(which) { |
| case UCHAR_LOWERCASE: |
| return (UBool)(UCASE_LOWER==ucase_getType(c)); |
| case UCHAR_UPPERCASE: |
| return (UBool)(UCASE_UPPER==ucase_getType(c)); |
| case UCHAR_SOFT_DOTTED: |
| return ucase_isSoftDotted(c); |
| case UCHAR_CASE_SENSITIVE: |
| return ucase_isCaseSensitive(c); |
| case UCHAR_CASED: |
| return (UBool)(UCASE_NONE!=ucase_getType(c)); |
| case UCHAR_CASE_IGNORABLE: |
| return (UBool)(ucase_getTypeOrIgnorable(c)>>2); |
| /* |
| * Note: The following Changes_When_Xyz are defined as testing whether |
| * the NFD form of the input changes when Xyz-case-mapped. |
| * However, this simpler implementation of these properties, |
| * ignoring NFD, passes the tests. |
| * The implementation needs to be changed if the tests start failing. |
| * When that happens, optimizations should be used to work with the |
| * per-single-code point ucase_toFullXyz() functions unless |
| * the NFD form has more than one code point, |
| * and the property starts set needs to be the union of the |
| * start sets for normalization and case mappings. |
| */ |
| case UCHAR_CHANGES_WHEN_LOWERCASED: |
| return (UBool)(ucase_toFullLower(c, NULL, NULL, &resultString, UCASE_LOC_ROOT)>=0); |
| case UCHAR_CHANGES_WHEN_UPPERCASED: |
| return (UBool)(ucase_toFullUpper(c, NULL, NULL, &resultString, UCASE_LOC_ROOT)>=0); |
| case UCHAR_CHANGES_WHEN_TITLECASED: |
| return (UBool)(ucase_toFullTitle(c, NULL, NULL, &resultString, UCASE_LOC_ROOT)>=0); |
| /* case UCHAR_CHANGES_WHEN_CASEFOLDED: -- in uprops.c */ |
| case UCHAR_CHANGES_WHEN_CASEMAPPED: |
| return (UBool)( |
| ucase_toFullLower(c, NULL, NULL, &resultString, UCASE_LOC_ROOT)>=0 || |
| ucase_toFullUpper(c, NULL, NULL, &resultString, UCASE_LOC_ROOT)>=0 || |
| ucase_toFullTitle(c, NULL, NULL, &resultString, UCASE_LOC_ROOT)>=0); |
| default: |
| return FALSE; |
| } |
| } |
