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Diffstat (limited to 'deps/node/deps/icu-small/source/common/unormimp.h')
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diff --git a/deps/node/deps/icu-small/source/common/unormimp.h b/deps/node/deps/icu-small/source/common/unormimp.h deleted file mode 100644 index 7f280551..00000000 --- a/deps/node/deps/icu-small/source/common/unormimp.h +++ /dev/null @@ -1,488 +0,0 @@ -// © 2016 and later: Unicode, Inc. and others. -// License & terms of use: http://www.unicode.org/copyright.html -/* -******************************************************************************* -* -* Copyright (C) 2001-2011, International Business Machines -* Corporation and others. All Rights Reserved. -* -******************************************************************************* -* file name: unormimp.h -* encoding: UTF-8 -* tab size: 8 (not used) -* indentation:4 -* -* created on: 2001may25 -* created by: Markus W. Scherer -*/ - -#ifndef __UNORMIMP_H__ -#define __UNORMIMP_H__ - -#include "unicode/utypes.h" - -#if !UCONFIG_NO_NORMALIZATION - -#include "udataswp.h" - -/* - * The 2001-2010 implementation of the normalization code loads its data from - * unorm.icu, which is generated with the gennorm tool. - * The format of that file is described at the end of this file. - */ - -/* norm32 value constants */ -enum { - /* quick check flags 0..3 set mean "no" for their forms */ - _NORM_QC_NFC=0x11, /* no|maybe */ - _NORM_QC_NFKC=0x22, /* no|maybe */ - _NORM_QC_NFD=4, /* no */ - _NORM_QC_NFKD=8, /* no */ - - _NORM_QC_ANY_NO=0xf, - - /* quick check flags 4..5 mean "maybe" for their forms; test flags>=_NORM_QC_MAYBE */ - _NORM_QC_MAYBE=0x10, - _NORM_QC_ANY_MAYBE=0x30, - - _NORM_QC_MASK=0x3f, - - _NORM_COMBINES_FWD=0x40, - _NORM_COMBINES_BACK=0x80, - _NORM_COMBINES_ANY=0xc0, - - _NORM_CC_SHIFT=8, /* UnicodeData.txt combining class in bits 15..8 */ - _NORM_CC_MASK=0xff00, - - _NORM_EXTRA_SHIFT=16, /* 16 bits for the index to UChars and other extra data */ - _NORM_EXTRA_INDEX_TOP=0xfc00, /* start of surrogate specials after shift */ - - _NORM_EXTRA_SURROGATE_MASK=0x3ff, - _NORM_EXTRA_SURROGATE_TOP=0x3f0, /* hangul etc. */ - - _NORM_EXTRA_HANGUL=_NORM_EXTRA_SURROGATE_TOP, - _NORM_EXTRA_JAMO_L, - _NORM_EXTRA_JAMO_V, - _NORM_EXTRA_JAMO_T -}; - -/* norm32 value constants using >16 bits */ -#define _NORM_MIN_SPECIAL 0xfc000000 -#define _NORM_SURROGATES_TOP 0xfff00000 -#define _NORM_MIN_HANGUL 0xfff00000 -#define _NORM_MIN_JAMO_V 0xfff20000 -#define _NORM_JAMO_V_TOP 0xfff30000 - -/* value constants for auxTrie */ -enum { - _NORM_AUX_COMP_EX_SHIFT=10, - _NORM_AUX_UNSAFE_SHIFT=11, - _NORM_AUX_NFC_SKIPPABLE_F_SHIFT=12 -}; - -#define _NORM_AUX_MAX_FNC ((int32_t)1<<_NORM_AUX_COMP_EX_SHIFT) - -#define _NORM_AUX_FNC_MASK (uint32_t)(_NORM_AUX_MAX_FNC-1) -#define _NORM_AUX_COMP_EX_MASK ((uint32_t)1<<_NORM_AUX_COMP_EX_SHIFT) -#define _NORM_AUX_UNSAFE_MASK ((uint32_t)1<<_NORM_AUX_UNSAFE_SHIFT) -#define _NORM_AUX_NFC_SKIP_F_MASK ((uint32_t)1<<_NORM_AUX_NFC_SKIPPABLE_F_SHIFT) - -/* canonStartSets[0..31] contains indexes for what is in the array */ -enum { - _NORM_SET_INDEX_CANON_SETS_LENGTH, /* number of uint16_t in canonical starter sets */ - _NORM_SET_INDEX_CANON_BMP_TABLE_LENGTH, /* number of uint16_t in the BMP search table (contains pairs) */ - _NORM_SET_INDEX_CANON_SUPP_TABLE_LENGTH,/* number of uint16_t in the supplementary search table (contains triplets) */ - - /* from formatVersion 2.3: */ - _NORM_SET_INDEX_NX_CJK_COMPAT_OFFSET, /* uint16_t offset from canonStartSets[0] to the - exclusion set for CJK compatibility characters */ - _NORM_SET_INDEX_NX_UNICODE32_OFFSET, /* uint16_t offset from canonStartSets[0] to the - exclusion set for Unicode 3.2 characters */ - _NORM_SET_INDEX_NX_RESERVED_OFFSET, /* uint16_t offset from canonStartSets[0] to the - end of the previous exclusion set */ - - _NORM_SET_INDEX_TOP=32 /* changing this requires a new formatVersion */ -}; - -/* more constants for canonical starter sets */ - -/* 14 bit indexes to canonical USerializedSets */ -#define _NORM_MAX_CANON_SETS 0x4000 - -/* single-code point BMP sets are encoded directly in the search table except if result=0x4000..0x7fff */ -#define _NORM_CANON_SET_BMP_MASK 0xc000 -#define _NORM_CANON_SET_BMP_IS_INDEX 0x4000 - -/* indexes[] value names */ -enum { - _NORM_INDEX_TRIE_SIZE, /* number of bytes in normalization trie */ - _NORM_INDEX_UCHAR_COUNT, /* number of UChars in extra data */ - - _NORM_INDEX_COMBINE_DATA_COUNT, /* number of uint16_t words for combining data */ - _NORM_INDEX_COMBINE_FWD_COUNT, /* number of code points that combine forward */ - _NORM_INDEX_COMBINE_BOTH_COUNT, /* number of code points that combine forward and backward */ - _NORM_INDEX_COMBINE_BACK_COUNT, /* number of code points that combine backward */ - - _NORM_INDEX_MIN_NFC_NO_MAYBE, /* first code point with quick check NFC NO/MAYBE */ - _NORM_INDEX_MIN_NFKC_NO_MAYBE, /* first code point with quick check NFKC NO/MAYBE */ - _NORM_INDEX_MIN_NFD_NO_MAYBE, /* first code point with quick check NFD NO/MAYBE */ - _NORM_INDEX_MIN_NFKD_NO_MAYBE, /* first code point with quick check NFKD NO/MAYBE */ - - _NORM_INDEX_FCD_TRIE_SIZE, /* number of bytes in FCD trie */ - - _NORM_INDEX_AUX_TRIE_SIZE, /* number of bytes in the auxiliary trie */ - _NORM_INDEX_CANON_SET_COUNT, /* number of uint16_t in the array of serialized USet */ - - _NORM_INDEX_TOP=32 /* changing this requires a new formatVersion */ -}; - -enum { - /* FCD check: everything below this code point is known to have a 0 lead combining class */ - _NORM_MIN_WITH_LEAD_CC=0x300 -}; - -enum { - /** - * Bit 7 of the length byte for a decomposition string in extra data is - * a flag indicating whether the decomposition string is - * preceded by a 16-bit word with the leading and trailing cc - * of the decomposition (like for A-umlaut); - * if not, then both cc's are zero (like for compatibility ideographs). - */ - _NORM_DECOMP_FLAG_LENGTH_HAS_CC=0x80, - /** - * Bits 6..0 of the length byte contain the actual length. - */ - _NORM_DECOMP_LENGTH_MASK=0x7f -}; - -/** Constants for options flags for normalization. */ -enum { - /** Options bit 0, do not decompose Hangul syllables. */ - UNORM_NX_HANGUL=1, - /** Options bit 1, do not decompose CJK compatibility characters. */ - UNORM_NX_CJK_COMPAT=2 -}; - -/** - * Description of the format of unorm.icu version 2.3. - * - * Main change from version 1 to version 2: - * Use of new, common UTrie instead of normalization-specific tries. - * Change to version 2.1: add third/auxiliary trie with associated data. - * Change to version 2.2: add skippable (f) flag data (_NORM_AUX_NFC_SKIP_F_MASK). - * Change to version 2.3: add serialized sets for normalization exclusions - * stored inside canonStartSets[] - * - * For more details of how to use the data structures see the code - * in unorm.cpp (runtime normalization code) and - * in gennorm.c and gennorm/store.c (build-time data generation). - * - * For the serialized format of UTrie see utrie.c/UTrieHeader. - * - * - Overall partition - * - * unorm.dat customarily begins with a UDataInfo structure, see udata.h and .c. - * After that there are the following structures: - * - * int32_t indexes[_NORM_INDEX_TOP]; -- _NORM_INDEX_TOP=32, see enum in this file - * - * UTrie normTrie; -- size in bytes=indexes[_NORM_INDEX_TRIE_SIZE] - * - * uint16_t extraData[extraDataTop]; -- extraDataTop=indexes[_NORM_INDEX_UCHAR_COUNT] - * extraData[0] contains the number of units for - * FC_NFKC_Closure (formatVersion>=2.1) - * - * uint16_t combiningTable[combiningTableTop]; -- combiningTableTop=indexes[_NORM_INDEX_COMBINE_DATA_COUNT] - * combiningTableTop may include one 16-bit padding unit - * to make sure that fcdTrie is 32-bit-aligned - * - * UTrie fcdTrie; -- size in bytes=indexes[_NORM_INDEX_FCD_TRIE_SIZE] - * - * UTrie auxTrie; -- size in bytes=indexes[_NORM_INDEX_AUX_TRIE_SIZE] - * - * uint16_t canonStartSets[canonStartSetsTop] -- canonStartSetsTop=indexes[_NORM_INDEX_CANON_SET_COUNT] - * serialized USets and binary search tables, see below - * - * - * The indexes array contains lengths and sizes of the following arrays and structures - * as well as the following values: - * indexes[_NORM_INDEX_COMBINE_FWD_COUNT]=combineFwdTop - * -- one more than the highest combining index computed for forward-only-combining characters - * indexes[_NORM_INDEX_COMBINE_BOTH_COUNT]=combineBothTop-combineFwdTop - * -- number of combining indexes computed for both-ways-combining characters - * indexes[_NORM_INDEX_COMBINE_BACK_COUNT]=combineBackTop-combineBothTop - * -- number of combining indexes computed for backward-only-combining characters - * - * indexes[_NORM_INDEX_MIN_NF*_NO_MAYBE] (where *={ C, D, KC, KD }) - * -- first code point with a quick check NF* value of NO/MAYBE - * - * - * - Tries - * - * The main structures are two UTrie tables ("compact arrays"), - * each with one index array and one data array. - * See utrie.h and utrie.c. - * - * - * - Tries in unorm.dat - * - * The first trie (normTrie above) - * provides data for the NF* quick checks and normalization. - * The second trie (fcdTrie above) provides data just for FCD checks. - * - * - * - norm32 data words from the first trie - * - * The norm32Table contains one 32-bit word "norm32" per code point. - * It contains the following bit fields: - * 31..16 extra data index, _NORM_EXTRA_SHIFT is used to shift this field down - * if this index is <_NORM_EXTRA_INDEX_TOP then it is an index into - * extraData[] where variable-length normalization data for this - * code point is found - * if this index is <_NORM_EXTRA_INDEX_TOP+_NORM_EXTRA_SURROGATE_TOP - * then this is a norm32 for a leading surrogate, and the index - * value is used together with the following trailing surrogate - * code unit in the second trie access - * if this index is >=_NORM_EXTRA_INDEX_TOP+_NORM_EXTRA_SURROGATE_TOP - * then this is a norm32 for a "special" character, - * i.e., the character is a Hangul syllable or a Jamo - * see _NORM_EXTRA_HANGUL etc. - * generally, instead of extracting this index from the norm32 and - * comparing it with the above constants, - * the normalization code compares the entire norm32 value - * with _NORM_MIN_SPECIAL, _NORM_SURROGATES_TOP, _NORM_MIN_HANGUL etc. - * - * 15..8 combining class (cc) according to UnicodeData.txt - * - * 7..6 _NORM_COMBINES_ANY flags, used in composition to see if a character - * combines with any following or preceding character(s) - * at all - * 7 _NORM_COMBINES_BACK - * 6 _NORM_COMBINES_FWD - * - * 5..0 quick check flags, set for "no" or "maybe", with separate flags for - * each normalization form - * the higher bits are "maybe" flags; for NF*D there are no such flags - * the lower bits are "no" flags for all forms, in the same order - * as the "maybe" flags, - * which is (MSB to LSB): NFKD NFD NFKC NFC - * 5..4 _NORM_QC_ANY_MAYBE - * 3..0 _NORM_QC_ANY_NO - * see further related constants - * - * - * - Extra data per code point - * - * "Extra data" is referenced by the index in norm32. - * It is variable-length data. It is only present, and only those parts - * of it are, as needed for a given character. - * The norm32 extra data index is added to the beginning of extraData[] - * to get to a vector of 16-bit words with data at the following offsets: - * - * [-1] Combining index for composition. - * Stored only if norm32&_NORM_COMBINES_ANY . - * [0] Lengths of the canonical and compatibility decomposition strings. - * Stored only if there are decompositions, i.e., - * if norm32&(_NORM_QC_NFD|_NORM_QC_NFKD) - * High byte: length of NFKD, or 0 if none - * Low byte: length of NFD, or 0 if none - * Each length byte also has another flag: - * Bit 7 of a length byte is set if there are non-zero - * combining classes (cc's) associated with the respective - * decomposition. If this flag is set, then the decomposition - * is preceded by a 16-bit word that contains the - * leading and trailing cc's. - * Bits 6..0 of a length byte are the length of the - * decomposition string, not counting the cc word. - * [1..n] NFD - * [n+1..] NFKD - * - * Each of the two decompositions consists of up to two parts: - * - The 16-bit words with the leading and trailing cc's. - * This is only stored if bit 7 of the corresponding length byte - * is set. In this case, at least one of the cc's is not zero. - * High byte: leading cc==cc of the first code point in the decomposition string - * Low byte: trailing cc==cc of the last code point in the decomposition string - * - The decomposition string in UTF-16, with length code units. - * - * - * - Combining indexes and combiningTable[] - * - * Combining indexes are stored at the [-1] offset of the extra data - * if the character combines forward or backward with any other characters. - * They are used for (re)composition in NF*C. - * Values of combining indexes are arranged according to whether a character - * combines forward, backward, or both ways: - * forward-only < both ways < backward-only - * - * The index values for forward-only and both-ways combining characters - * are indexes into the combiningTable[]. - * The index values for backward-only combining characters are simply - * incremented from the preceding index values to be unique. - * - * In the combiningTable[], a variable-length list - * of variable-length (back-index, code point) pair entries is stored - * for each forward-combining character. - * - * These back-indexes are the combining indexes of both-ways or backward-only - * combining characters that the forward-combining character combines with. - * - * Each list is sorted in ascending order of back-indexes. - * Each list is terminated with the last back-index having bit 15 set. - * - * Each pair (back-index, code point) takes up either 2 or 3 - * 16-bit words. - * The first word of a list entry is the back-index, with its bit 15 set if - * this is the last pair in the list. - * - * The second word contains flags in bits 15..13 that determine - * if there is a third word and how the combined character is encoded: - * 15 set if there is a third word in this list entry - * 14 set if the result is a supplementary character - * 13 set if the result itself combines forward - * - * According to these bits 15..14 of the second word, - * the result character is encoded as follows: - * 00 or 01 The result is <=0x1fff and stored in bits 12..0 of - * the second word. - * 10 The result is 0x2000..0xffff and stored in the third word. - * Bits 12..0 of the second word are not used. - * 11 The result is a supplementary character. - * Bits 9..0 of the leading surrogate are in bits 9..0 of - * the second word. - * Add 0xd800 to these bits to get the complete surrogate. - * Bits 12..10 of the second word are not used. - * The trailing surrogate is stored in the third word. - * - * - * - FCD trie - * - * The FCD trie is very simple. - * It is a folded trie with 16-bit data words. - * In each word, the high byte contains the leading cc of the character, - * and the low byte contains the trailing cc of the character. - * These cc's are the cc's of the first and last code points in the - * canonical decomposition of the character. - * - * Since all 16 bits are used for cc's, lead surrogates must be tested - * by checking the code unit instead of the trie data. - * This is done only if the 16-bit data word is not zero. - * If the code unit is a leading surrogate and the data word is not zero, - * then instead of cc's it contains the offset for the second trie lookup. - * - * - * - Auxiliary trie and data - * - * The auxiliary 16-bit trie contains data for additional properties. - * Bits - * 15..13 reserved - * 12 not NFC_Skippable (f) (formatVersion>=2.2) - * 11 flag: not a safe starter for canonical closure - * 10 composition exclusion - * 9.. 0 index into extraData[] to FC_NFKC_Closure string - * (not for lead surrogate), - * or lead surrogate offset (for lead surrogate, if 9..0 not zero) - * - * - FC_NFKC_Closure strings in extraData[] - * - * Strings are either stored as a single code unit or as the length - * followed by that many units. - * const UChar *s=extraData+(index from auxTrie data bits 9..0); - * int32_t length; - * if(*s<0xff00) { - * // s points to the single-unit string - * length=1; - * } else { - * length=*s&0xff; - * ++s; - * } - * - * Conditions for "NF* Skippable" from Mark Davis' com.ibm.text.UCD.NFSkippable: - * (used in NormalizerTransliterator) - * - * A skippable character is - * a) unassigned, or ALL of the following: - * b) of combining class 0. - * c) not decomposed by this normalization form. - * AND if NFC or NFKC, - * d) can never compose with a previous character. - * e) can never compose with a following character. - * f) can never change if another character is added. - * Example: a-breve might satisfy all but f, but if you - * add an ogonek it changes to a-ogonek + breve - * - * a)..e) must be tested from norm32. - * Since f) is more complicated, the (not-)NFC_Skippable flag (f) is built - * into the auxiliary trie. - * The same bit is used for NFC and NFKC; (c) differs for them. - * As usual, we build the "not skippable" flags so that unassigned - * code points get a 0 bit. - * This bit is only valid after (a)..(e) test FALSE; test NFD_NO before (f) as well. - * Test Hangul LV syllables entirely in code. - * - * - * - structure inside canonStartSets[] - * - * This array maps from code points c to sets of code points (USerializedSet). - * The result sets are the code points whose canonical decompositions start - * with c. - * - * canonStartSets[] contains the following sub-arrays: - * - * indexes[_NORM_SET_INDEX_TOP] - * - contains lengths of sub-arrays etc. - * - * startSets[indexes[_NORM_SET_INDEX_CANON_SETS_LENGTH]-_NORM_SET_INDEX_TOP] - * - contains serialized sets (USerializedSet) of canonical starters for - * enumerating canonically equivalent strings - * indexes[_NORM_SET_INDEX_CANON_SETS_LENGTH] includes _NORM_SET_INDEX_TOP - * for details about the structure see uset.c - * - * bmpTable[indexes[_NORM_SET_INDEX_CANON_BMP_TABLE_LENGTH]] - * - a sorted search table for BMP code points whose results are - * either indexes to USerializedSets or single code points for - * single-code point sets; - * each entry is a pair of { code point, result } with result=(binary) yy xxxxxx xxxxxxxx - * if yy==01 then there is a USerializedSet at canonStartSets+x - * else build a USerializedSet with result as the single code point - * - * suppTable[indexes[_NORM_SET_INDEX_CANON_SUPP_TABLE_LENGTH]] - * - a sorted search table for supplementary code points whose results are - * either indexes to USerializedSets or single code points for - * single-code point sets; - * each entry is a triplet of { high16(cp), low16(cp), result } - * each code point's high-word may contain extra data in bits 15..5: - * if the high word has bit 15 set, then build a set with a single code point - * which is (((high16(cp)&0x1f00)<<8)|result; - * else there is a USerializedSet at canonStartSets+result - * - * FormatVersion 2.3 adds 2 serialized sets for normalization exclusions. - * They are stored in the data file so that the runtime normalization code need - * not depend on other properties and their data and implementation files. - * The _NORM_SET_INDEX_NX_..._OFFSET offsets in the canonStartSets index table - * give the location for each set. - * There is no set stored for UNORM_NX_HANGUL because it's trivial to create - * without using properties. - * - * Set contents: - * - * _NORM_SET_INDEX_NX_CJK_COMPAT_OFFSET (for UNORM_NX_CJK_COMPAT) - * [[:Ideographic:]&[:NFD_QC=No:]] - * =[CJK Ideographs]&[has canonical decomposition] - * - * _NORM_SET_INDEX_NX_UNICODE32_OFFSET (for UNORM_UNICODE_3_2) - * [:^Age=3.2:] - * =set with all code points that were not designated by the specified Unicode version - * - * _NORM_SET_INDEX_NX_RESERVED_OFFSET - * This is an offset that points to where the next, future set would start. - * Currently it indicates where the previous set ends, and thus its length. - * The name for this enum constant may in the future be applied to different - * index slots. In order to get the limit of a set, use its index slot and - * the immediately following one regardless of that one's enum name. - */ - -#endif /* #if !UCONFIG_NO_NORMALIZATION */ - -#endif |