376 lines
16 KiB
C
376 lines
16 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 1998-2000, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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*
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* Private implementation header for C collation
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* file name: ucolimp.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2000dec11
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* created by: Vladimir Weinstein
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*/
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#ifndef UCOL_IMP_H
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#define UCOL_IMP_H
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#include "unicode/ucol.h"
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#include "ucmp32.h"
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#include "unicode/ures.h"
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/* This is the size of the stack allocated buffer for sortkey generation and similar operations */
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/* if it is too small, heap allocation will occur.*/
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/* You can expect stack usage in following multiples */
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/* getSortkey 6*UCOL_MAX_BUFFER */
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/* strcoll 26 - 32 */
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/* strcollInc 14 - 46 */
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/* you can change this value if you need memory - it will affect the performance, though, since we're going to malloc */
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#define UCOL_MAX_BUFFER 256
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#define UCOL_NORMALIZATION_GROWTH 2
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/* This writable buffer is used if we encounter Thai and need to reorder the string on the fly */
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/* Sometimes we already have a writable buffer (like in case of normalized strings). */
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/* you can change this value if you need memory - it will affect the performance, though, since we're going to malloc */
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#define UCOL_WRITABLE_BUFFER_SIZE 256
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/* This is the size of the buffer for expansion CE's */
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/* In reality we should not have to deal with expm sequences longer then 16 */
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/* you can change this value if you need memory */
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/* WARNING THIS BUFFER DOES NOT HAVE MALLOC FALLBACK. If you make it too small, you'll get in trouble */
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/* Reasonable small value is around 10, if you don't do Arabic or other funky collations that have long expansion sequence */
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/* This is the longest expansion sequence we can handle without bombing out */
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#define UCOL_EXPAND_CE_BUFFER_SIZE 64
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struct collIterate {
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UChar *string; /* Original string */
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UChar *len; /* Original string length */
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UChar *pos; /* This is position in the string */
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uint32_t *toReturn; /* This is the CE from CEs buffer that should be returned */
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uint32_t *CEpos; /* This is the position to which we have stored processed CEs */
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uint32_t CEs[UCOL_EXPAND_CE_BUFFER_SIZE]; /* This is where we store CEs */
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UBool isThai; /* Have we already encountered a Thai prevowel */
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UBool isWritable; /* is the source buffer writable? */
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UChar stackWritableBuffer[UCOL_WRITABLE_BUFFER_SIZE]; /* A writable buffer. */
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UChar *writableBuffer;
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};
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struct incrementalContext {
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UCharForwardIterator *source;
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void *sourceContext;
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UChar currentChar;
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UChar lastChar;
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UChar stackString[UCOL_MAX_BUFFER]; /* Original string */
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UChar *stringP; /* This is position in the string */
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UChar *len; /* Original string length */
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UChar *capacity; /* This is capacity */
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uint32_t *toReturn; /* This is the CE from CEs buffer that should be returned */
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uint32_t *CEpos; /* This is the position to which we have stored processed CEs */
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uint32_t CEs[UCOL_EXPAND_CE_BUFFER_SIZE]; /* This is where we store CEs */
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UBool panic; /* can't handle it any more - we have to call the cavalry */
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};
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/* Fixup table a la Markus */
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/* see http://www.ibm.com/software/developer/library/utf16.html for further explanation */
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static uint8_t utf16fixup[32] = {
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0x20, 0xf8, 0xf8, 0xf8, 0xf8
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};
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/* from coleiterator */
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#define UCOL_UNMAPPEDCHARVALUE 0x7fff0000
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#define UCOL_LEVELTERMINATOR 1
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/* need look up in .commit() */
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#define UCOL_CHARINDEX 0x70000000
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/* Expand index follows */
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#define UCOL_EXPANDCHARINDEX 0x7E000000
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/* contract indexes follows */
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#define UCOL_CONTRACTCHARINDEX 0x7F000000
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/* unmapped character values */
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#define UCOL_UNMAPPED 0xFFFFFFFF
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/* primary strength increment */
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#define UCOL_PRIMARYORDERINCREMENT 0x00010000
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/* secondary strength increment */
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#define UCOL_SECONDARYORDERINCREMENT 0x00000100
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/* tertiary strength increment */
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#define UCOL_TERTIARYORDERINCREMENT 0x00000001
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/* maximum ignorable char order value */
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#define UCOL_MAXIGNORABLE 0x00010000
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/* mask off secondary and tertiary order */
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#define UCOL_SECONDARYRESETMASK 0x0000ffff
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/* mask off ignorable char order */
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#define UCOL_IGNORABLEMASK 0x0000ffff
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/* use only the primary difference */
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#define UCOL_PRIMARYDIFFERENCEONLY 0xffff0000
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/* use only the primary and secondary difference */
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#define UCOL_SECONDARYDIFFERENCEONLY 0xffffff00
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/* mask off anything but primary order */
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#define UCOL_PRIMARYORDERMASK 0xffff0000
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/* mask off anything but long primary order */
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#define UCOL_LONGPRIMARYORDERMASK 0xffffff00
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/* mask off anything but secondary order */
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#define UCOL_SECONDARYORDERMASK 0x0000ff00
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/* mask off anything but tertiary order */
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#define UCOL_TERTIARYORDERMASK 0x000000ff
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/* primary order shift */
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#define UCOL_PRIMARYORDERSHIFT 16
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/* long primary order shift */
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#define UCOL_LONGPRIMARYORDERSHIFT 8
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/* secondary order shift */
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#define UCOL_SECONDARYORDERSHIFT 8
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/* minimum sort key offset */
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#define UCOL_SORTKEYOFFSET 2
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/* Indicates the char is a contract char */
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#define UCOL_CONTRACTCHAROVERFLOW 0x7FFFFFFF
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/* starting value for collation elements */
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#define UCOL_COLELEMENTSTART 0x02020202
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/* testing mask for primary low element */
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#define UCOL_PRIMARYLOWZEROMASK 0x00FF0000
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/* reseting value for secondaries and tertiaries */
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#define UCOL_RESETSECONDARYTERTIARY 0x00000202
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/* reseting value for tertiaries */
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#define UCOL_RESETTERTIARY 0x00000002
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#define UCOL_IGNORABLE 0
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#define UCOL_PRIMIGNORABLE 0
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#define UCOL_SECIGNORABLE 0
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#define UCOL_TERIGNORABLE 0
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/* get weights from a CE */
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#define UCOL_PRIMARYORDER(order) (isLongPrimary((order))?(((order) & UCOL_LONGPRIMARYORDERMASK)>> UCOL_LONGPRIMARYORDERSHIFT):(((order) & UCOL_PRIMARYORDERMASK)>> UCOL_PRIMARYORDERSHIFT))
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#define UCOL_SECONDARYORDER(order) (isLongPrimary((order))?UCOL_UNMARKED:((order) & UCOL_SECONDARYORDERMASK)>> UCOL_SECONDARYORDERSHIFT)
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#define UCOL_TERTIARYORDER(order) ((order) & UCOL_TERTIARYORDERMASK)
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/**
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* Determine if a character is a Thai vowel (which sorts after
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* its base consonant).
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*/
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#define UCOL_ISTHAIPREVOWEL(ch) ((uint32_t)(ch) - 0xe40) <= (0xe44 - 0xe40)
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/**
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* Determine if a character is a Thai base consonant
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*/
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#define UCOL_ISTHAIBASECONSONANT(ch) ((uint32_t)(ch) - 0xe01) <= (0xe2e - 0xe01)
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/* initializes collIterate structure */
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/* made as macro to speed up things */
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#define init_collIterate(sourceString, sourceLen, s, isSourceWritable) { \
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(s)->string = (s)->pos = (UChar *)(sourceString); \
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(s)->len = (UChar *)(sourceString)+(sourceLen); \
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(s)->CEpos = (s)->toReturn = (s)->CEs; \
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(s)->isThai = TRUE; \
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(s)->isWritable = (isSourceWritable); \
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(s)->writableBuffer = (s)->stackWritableBuffer; \
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}
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/* a macro that gets a simple CE */
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/* for more complicated CEs it resorts to getComplicatedCE (what else) */
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#define UCOL_GETNEXTCE(order, coll, collationSource, status) { \
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if (U_FAILURE(*(status)) || ((collationSource).pos>=(collationSource).len \
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&& (collationSource).CEpos <= (collationSource).toReturn)) { \
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(order) = UCOL_NULLORDER; \
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} else if ((collationSource).CEpos > (collationSource).toReturn) { \
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(order) = *((collationSource).toReturn++); \
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(collationSource).pos--; \
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} else { \
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UChar ch = *(collationSource).pos; \
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(collationSource).CEpos = (collationSource).toReturn = (collationSource).CEs; \
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if(ch < 0xFF) { \
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(order) = (coll)->latinOneMapping[ch]; \
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} else { \
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(order) = ucmp32_get((coll)->mapping, ch); \
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} \
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if((order) >= UCOL_NOT_FOUND) { \
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*((collationSource).CEpos) = (order); \
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(order) = getSpecialCE((coll), &(collationSource), (status)); \
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if((order) == UCOL_NOT_FOUND) { \
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(order) = ucol_getNextUCA(ch, &(collationSource), (status)); \
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} \
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} \
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} \
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(collationSource).pos++; \
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}
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uint32_t getSpecialCE(const UCollator *coll, collIterate *source, UErrorCode *status);
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uint32_t ucol_getNextCE(const UCollator *coll, collIterate *collationSource, UErrorCode *status);
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uint32_t ucol_getNextUCA(UChar ch, collIterate *collationSource, UErrorCode *status);
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void incctx_cleanUpContext(incrementalContext *ctx);
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UChar incctx_appendChar(incrementalContext *ctx, UChar c);
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/* function used by C++ getCollationKey to prevent restarting the calculation */
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U_CFUNC uint8_t *ucol_getSortKeyWithAllocation(const UCollator *coll,
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const UChar *source,
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int32_t sourceLength, int32_t *resultLen);
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/* get some memory */
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void *ucol_getABuffer(const UCollator *coll, uint32_t size);
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/* worker function for generating sortkeys */
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int32_t
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ucol_calcSortKey(const UCollator *coll,
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const UChar *source,
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int32_t sourceLength,
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uint8_t **result,
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int32_t resultLength,
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UBool allocatePrimary,
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UErrorCode *status);
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/**
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* Makes a copy of the Collator's rule data. The format is
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* that of .col files.
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*
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* @param length returns the length of the data, in bytes.
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* @param status the error status
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* @return memory, owned by the caller, of size 'length' bytes.
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* @internal INTERNAL USE ONLY
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*/
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U_CAPI uint8_t *
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ucol_cloneRuleData(UCollator *coll, int32_t *length, UErrorCode *status);
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#define UCOL_SPECIAL_FLAG 0xF0000000
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#define UCOL_TAG_SHIFT 24
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#define UCOL_TAG_MASK 0x0F000000
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#define INIT_EXP_TABLE_SIZE 1024
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#define UCOL_NOT_FOUND 0xF0000000
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#define UCOL_EXPANSION 0xF1000000
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#define UCOL_CONTRACTION 0xF2000000
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#define UCOL_THAI 0xF3000000
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#define UCOL_UNMARKED 0x03
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#define UCOL_NEW_TERTIARYORDERMASK 0x0000003f
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/* Bit mask for primary collation strength. */
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#define UCOL_PRIMARYMASK 0xFFFF0000
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/* Bit mask for secondary collation strength. */
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#define UCOL_SECONDARYMASK 0x0000FF00
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/* Bit mask for tertiary collation strength. */
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#define UCOL_TERTIARYMASK 0x000000FF
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/** This indicates the last element in a UCollationElements has been consumed.
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*
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*/
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#define UCOL_NULLORDER 0xFFFFFFFF
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#define isSpecial(CE) ((((CE)&UCOL_SPECIAL_FLAG)>>28)==0xF)
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#define isContinuation(CE) ((CE) & 0xC0) == 0x80
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#define isFlagged(CE) ((CE) & 0x80) == 0x80
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#define isLongPrimary(CE) ((CE) & 0xC0) == 0xC0
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#define getCETag(CE) (((CE)&UCOL_TAG_MASK)>>UCOL_TAG_SHIFT)
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#define isContraction(CE) (isSpecial((CE)) && (getCETag((CE)) == CONTRACTION_TAG))
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#define constructContractCE(CE) (UCOL_SPECIAL_FLAG | (CONTRACTION_TAG<<UCOL_TAG_SHIFT) | ((CE))&0xFFFFFF)
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#define getContractOffset(CE) ((CE)&0xFFFFFF)
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#define getExpansionOffset(CE) (((CE)&0x00FFFFF0)>>4)
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#define getExpansionCount(CE) ((CE)&0xF)
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#define UCA_DATA_TYPE "dat"
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#define UCA_DATA_NAME "UCATable"
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#define UCOL_CASE_BIT_MASK 0x40
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#define UCOL_FLAG_BIT_MASK 0x80
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#define UCOL_COMMON_TOP2 0x81
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#define UCOL_COMMON_BOT2 0x03
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#define UCOL_TOP_COUNT2 0x40
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#define UCOL_BOT_COUNT2 0x3D
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#define UCOL_COMMON_TOP3 0x84
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#define UCOL_COMMON_BOT3 0x03
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#define UCOL_TOP_COUNT3 0x40
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#define UCOL_BOT_COUNT3 0x40
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#define UCOL_COMMON2 0x03
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#define UCOL_COMMON3 0x03
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#define UCOL_COMMON4 0xFF
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typedef enum {
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NOT_FOUND_TAG = 0,
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EXPANSION_TAG = 1,
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CONTRACTION_TAG = 2,
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THAI_TAG = 3,
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CHARSET_TAG = 4,
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SURROGATE_TAG = 5,
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CE_TAGS_COUNT
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} UColCETags;
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typedef struct {
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int32_t size;
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/* all the offsets are in bytes */
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/* to get the address add to the header address and cast properly */
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uint32_t CEindex; /* uint16_t *CEindex; */
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uint32_t CEvalues; /* int32_t *CEvalues; */
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uint32_t mappingPosition; /* const uint8_t *mappingPosition; */
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uint32_t expansion; /* uint32_t *expansion; */
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uint32_t contractionIndex; /* UChar *contractionIndex; */
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uint32_t contractionCEs; /* uint32_t *contractionCEs; */
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uint32_t latinOneMapping; /* fast track to latin1 chars */
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CompactIntArray *mapping;
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int32_t CEcount;
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UChar variableTopValue;
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UVersionInfo version;
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UColAttributeValue frenchCollation;
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UColAttributeValue alternateHandling; /* attribute for handling variable elements*/
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UColAttributeValue caseFirst; /* who goes first, lower case or uppercase */
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UColAttributeValue caseLevel; /* do we have an extra case level */
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UColAttributeValue normalizationMode; /* attribute for normalization */
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UColAttributeValue strength; /* attribute for strength */
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} UCATableHeader;
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struct UCollator {
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UBool freeOnClose;
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UResourceBundle *rb;
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const UCATableHeader *image;
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CompactIntArray *mapping;
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const uint32_t *latinOneMapping;
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const uint32_t *expansion;
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const UChar *contractionIndex;
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const uint32_t *contractionCEs;
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const uint8_t *scriptOrder;
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uint8_t variableMax;
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UChar variableTopValue;
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UColAttributeValue frenchCollation;
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UColAttributeValue alternateHandling; /* attribute for handling variable elements*/
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UColAttributeValue caseFirst; /* who goes first, lower case or uppercase */
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UColAttributeValue caseLevel; /* do we have an extra case level */
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UColAttributeValue normalizationMode; /* attribute for normalization */
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UColAttributeValue strength; /* attribute for strength */
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UBool variableTopValueisDefault;
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UBool frenchCollationisDefault;
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UBool alternateHandlingisDefault; /* attribute for handling variable elements*/
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UBool caseFirstisDefault; /* who goes first, lower case or uppercase */
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UBool caseLevelisDefault; /* do we have an extra case level */
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UBool normalizationModeisDefault; /* attribute for normalization */
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UBool strengthisDefault; /* attribute for strength */
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UChar *rules;
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UChar zero;
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};
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/* various internal functions */
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void init_incrementalContext(UCharForwardIterator *source, void *sourceContext, incrementalContext *s);
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int32_t ucol_getIncrementalCE(const UCollator *coll, incrementalContext *ctx, UErrorCode *status);
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void incctx_cleanUpContext(incrementalContext *ctx);
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UChar incctx_appendChar(incrementalContext *ctx, UChar c);
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UCollationResult alternateIncrementalProcessing(const UCollator *coll, incrementalContext *srcCtx, incrementalContext *trgCtx);
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void ucol_initUCA(UErrorCode *status);
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UCollator* ucol_initCollator(const UCATableHeader *image, UCollator *fillIn, UErrorCode *status);
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uint32_t ucol_getIncrementalUCA(UChar ch, incrementalContext *collationSource, UErrorCode *status);
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int32_t ucol_getIncrementalSpecialCE(const UCollator *coll, incrementalContext *ctx, UErrorCode *status);
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#endif
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