526 lines
15 KiB
C
526 lines
15 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 2002-2011, 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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* file name: propsvec.c
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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: 2002feb22
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* created by: Markus W. Scherer
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*
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* Store bits (Unicode character properties) in bit set vectors.
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*/
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#include <stdlib.h>
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#include "unicode/utypes.h"
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#include "cmemory.h"
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#include "utrie.h"
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#include "utrie2.h"
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#include "uarrsort.h"
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#include "propsvec.h"
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#include "uassert.h"
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struct UPropsVectors {
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uint32_t *v;
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int32_t columns; /* number of columns, plus two for start & limit values */
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int32_t maxRows;
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int32_t rows;
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int32_t prevRow; /* search optimization: remember last row seen */
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UBool isCompacted;
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};
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#define UPVEC_INITIAL_ROWS (1<<12)
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#define UPVEC_MEDIUM_ROWS ((int32_t)1<<16)
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#define UPVEC_MAX_ROWS (UPVEC_MAX_CP+1)
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U_CAPI UPropsVectors * U_EXPORT2
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upvec_open(int32_t columns, UErrorCode *pErrorCode) {
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UPropsVectors *pv;
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uint32_t *v, *row;
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uint32_t cp;
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if(U_FAILURE(*pErrorCode)) {
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return NULL;
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}
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if(columns<1) {
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*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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columns+=2; /* count range start and limit columns */
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pv=(UPropsVectors *)uprv_malloc(sizeof(UPropsVectors));
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v=(uint32_t *)uprv_malloc(UPVEC_INITIAL_ROWS*columns*4);
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if(pv==NULL || v==NULL) {
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uprv_free(pv);
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uprv_free(v);
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*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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uprv_memset(pv, 0, sizeof(UPropsVectors));
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pv->v=v;
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pv->columns=columns;
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pv->maxRows=UPVEC_INITIAL_ROWS;
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pv->rows=2+(UPVEC_MAX_CP-UPVEC_FIRST_SPECIAL_CP);
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/* set the all-Unicode row and the special-value rows */
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row=pv->v;
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uprv_memset(row, 0, pv->rows*columns*4);
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row[0]=0;
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row[1]=0x110000;
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row+=columns;
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for(cp=UPVEC_FIRST_SPECIAL_CP; cp<=UPVEC_MAX_CP; ++cp) {
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row[0]=cp;
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row[1]=cp+1;
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row+=columns;
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}
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return pv;
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}
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U_CAPI void U_EXPORT2
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upvec_close(UPropsVectors *pv) {
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if(pv!=NULL) {
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uprv_free(pv->v);
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uprv_free(pv);
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}
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}
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static uint32_t *
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_findRow(UPropsVectors *pv, UChar32 rangeStart) {
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uint32_t *row;
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int32_t columns, i, start, limit, prevRow;
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columns=pv->columns;
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limit=pv->rows;
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prevRow=pv->prevRow;
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/* check the vicinity of the last-seen row (start searching with an unrolled loop) */
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row=pv->v+prevRow*columns;
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if(rangeStart>=(UChar32)row[0]) {
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if(rangeStart<(UChar32)row[1]) {
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/* same row as last seen */
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return row;
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} else if(rangeStart<(UChar32)(row+=columns)[1]) {
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/* next row after the last one */
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pv->prevRow=prevRow+1;
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return row;
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} else if(rangeStart<(UChar32)(row+=columns)[1]) {
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/* second row after the last one */
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pv->prevRow=prevRow+2;
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return row;
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} else if((rangeStart-(UChar32)row[1])<10) {
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/* we are close, continue looping */
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prevRow+=2;
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do {
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++prevRow;
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row+=columns;
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} while(rangeStart>=(UChar32)row[1]);
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pv->prevRow=prevRow;
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return row;
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}
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} else if(rangeStart<(UChar32)pv->v[1]) {
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/* the very first row */
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pv->prevRow=0;
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return pv->v;
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}
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/* do a binary search for the start of the range */
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start=0;
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while(start<limit-1) {
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i=(start+limit)/2;
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row=pv->v+i*columns;
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if(rangeStart<(UChar32)row[0]) {
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limit=i;
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} else if(rangeStart<(UChar32)row[1]) {
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pv->prevRow=i;
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return row;
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} else {
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start=i;
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}
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}
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/* must be found because all ranges together always cover all of Unicode */
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pv->prevRow=start;
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return pv->v+start*columns;
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}
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U_CAPI void U_EXPORT2
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upvec_setValue(UPropsVectors *pv,
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UChar32 start, UChar32 end,
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int32_t column,
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uint32_t value, uint32_t mask,
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UErrorCode *pErrorCode) {
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uint32_t *firstRow, *lastRow;
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int32_t columns;
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UChar32 limit;
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UBool splitFirstRow, splitLastRow;
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/* argument checking */
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if(U_FAILURE(*pErrorCode)) {
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return;
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}
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if( pv==NULL ||
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start<0 || start>end || end>UPVEC_MAX_CP ||
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column<0 || column>=(pv->columns-2)
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) {
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*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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if(pv->isCompacted) {
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*pErrorCode=U_NO_WRITE_PERMISSION;
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return;
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}
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limit=end+1;
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/* initialize */
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columns=pv->columns;
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column+=2; /* skip range start and limit columns */
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value&=mask;
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/* find the rows whose ranges overlap with the input range */
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/* find the first and last rows, always successful */
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firstRow=_findRow(pv, start);
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lastRow=_findRow(pv, end);
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/*
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* Rows need to be split if they partially overlap with the
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* input range (only possible for the first and last rows)
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* and if their value differs from the input value.
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*/
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splitFirstRow= (UBool)(start!=(UChar32)firstRow[0] && value!=(firstRow[column]&mask));
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splitLastRow= (UBool)(limit!=(UChar32)lastRow[1] && value!=(lastRow[column]&mask));
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/* split first/last rows if necessary */
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if(splitFirstRow || splitLastRow) {
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int32_t count, rows;
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rows=pv->rows;
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if((rows+splitFirstRow+splitLastRow)>pv->maxRows) {
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uint32_t *newVectors;
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int32_t newMaxRows;
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if(pv->maxRows<UPVEC_MEDIUM_ROWS) {
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newMaxRows=UPVEC_MEDIUM_ROWS;
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} else if(pv->maxRows<UPVEC_MAX_ROWS) {
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newMaxRows=UPVEC_MAX_ROWS;
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} else {
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/* Implementation bug, or UPVEC_MAX_ROWS too low. */
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*pErrorCode=U_INTERNAL_PROGRAM_ERROR;
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return;
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}
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newVectors=(uint32_t *)uprv_malloc(newMaxRows*columns*4);
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if(newVectors==NULL) {
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*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
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return;
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}
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uprv_memcpy(newVectors, pv->v, rows*columns*4);
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firstRow=newVectors+(firstRow-pv->v);
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lastRow=newVectors+(lastRow-pv->v);
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uprv_free(pv->v);
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pv->v=newVectors;
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pv->maxRows=newMaxRows;
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}
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/* count the number of row cells to move after the last row, and move them */
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count = (int32_t)((pv->v+rows*columns)-(lastRow+columns));
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if(count>0) {
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uprv_memmove(
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lastRow+(1+splitFirstRow+splitLastRow)*columns,
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lastRow+columns,
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count*4);
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}
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pv->rows=rows+splitFirstRow+splitLastRow;
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/* split the first row, and move the firstRow pointer to the second part */
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if(splitFirstRow) {
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/* copy all affected rows up one and move the lastRow pointer */
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count = (int32_t)((lastRow-firstRow)+columns);
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uprv_memmove(firstRow+columns, firstRow, count*4);
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lastRow+=columns;
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/* split the range and move the firstRow pointer */
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firstRow[1]=firstRow[columns]=(uint32_t)start;
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firstRow+=columns;
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}
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/* split the last row */
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if(splitLastRow) {
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/* copy the last row data */
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uprv_memcpy(lastRow+columns, lastRow, columns*4);
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/* split the range and move the firstRow pointer */
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lastRow[1]=lastRow[columns]=(uint32_t)limit;
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}
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}
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/* set the "row last seen" to the last row for the range */
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pv->prevRow=(int32_t)((lastRow-(pv->v))/columns);
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/* set the input value in all remaining rows */
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firstRow+=column;
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lastRow+=column;
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mask=~mask;
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for(;;) {
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*firstRow=(*firstRow&mask)|value;
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if(firstRow==lastRow) {
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break;
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}
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firstRow+=columns;
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}
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}
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U_CAPI uint32_t U_EXPORT2
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upvec_getValue(const UPropsVectors *pv, UChar32 c, int32_t column) {
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uint32_t *row;
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UPropsVectors *ncpv;
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if(pv->isCompacted || c<0 || c>UPVEC_MAX_CP || column<0 || column>=(pv->columns-2)) {
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return 0;
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}
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ncpv=(UPropsVectors *)pv;
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row=_findRow(ncpv, c);
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return row[2+column];
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}
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U_CAPI uint32_t * U_EXPORT2
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upvec_getRow(const UPropsVectors *pv, int32_t rowIndex,
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UChar32 *pRangeStart, UChar32 *pRangeEnd) {
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uint32_t *row;
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int32_t columns;
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if(pv->isCompacted || rowIndex<0 || rowIndex>=pv->rows) {
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return NULL;
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}
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columns=pv->columns;
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row=pv->v+rowIndex*columns;
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if(pRangeStart!=NULL) {
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*pRangeStart=(UChar32)row[0];
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}
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if(pRangeEnd!=NULL) {
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*pRangeEnd=(UChar32)row[1]-1;
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}
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return row+2;
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}
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static int32_t U_CALLCONV
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upvec_compareRows(const void *context, const void *l, const void *r) {
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const uint32_t *left=(const uint32_t *)l, *right=(const uint32_t *)r;
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const UPropsVectors *pv=(const UPropsVectors *)context;
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int32_t i, count, columns;
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count=columns=pv->columns; /* includes start/limit columns */
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/* start comparing after start/limit but wrap around to them */
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i=2;
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do {
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if(left[i]!=right[i]) {
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return left[i]<right[i] ? -1 : 1;
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}
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if(++i==columns) {
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i=0;
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}
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} while(--count>0);
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return 0;
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}
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U_CAPI void U_EXPORT2
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upvec_compact(UPropsVectors *pv, UPVecCompactHandler *handler, void *context, UErrorCode *pErrorCode) {
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uint32_t *row;
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int32_t i, columns, valueColumns, rows, count;
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UChar32 start, limit;
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/* argument checking */
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if(U_FAILURE(*pErrorCode)) {
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return;
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}
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if(handler==NULL) {
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*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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if(pv->isCompacted) {
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return;
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}
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/* Set the flag now: Sorting and compacting destroys the builder data structure. */
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pv->isCompacted=TRUE;
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rows=pv->rows;
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columns=pv->columns;
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U_ASSERT(columns>=3); /* upvec_open asserts this */
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valueColumns=columns-2; /* not counting start & limit */
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/* sort the properties vectors to find unique vector values */
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uprv_sortArray(pv->v, rows, columns*4,
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upvec_compareRows, pv, FALSE, pErrorCode);
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if(U_FAILURE(*pErrorCode)) {
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return;
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}
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/*
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* Find and set the special values.
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* This has to do almost the same work as the compaction below,
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* to find the indexes where the special-value rows will move.
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*/
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row=pv->v;
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count=-valueColumns;
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for(i=0; i<rows; ++i) {
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start=(UChar32)row[0];
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/* count a new values vector if it is different from the current one */
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if(count<0 || 0!=uprv_memcmp(row+2, row-valueColumns, valueColumns*4)) {
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count+=valueColumns;
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}
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if(start>=UPVEC_FIRST_SPECIAL_CP) {
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handler(context, start, start, count, row+2, valueColumns, pErrorCode);
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if(U_FAILURE(*pErrorCode)) {
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return;
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}
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}
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row+=columns;
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}
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/* count is at the beginning of the last vector, add valueColumns to include that last vector */
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count+=valueColumns;
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/* Call the handler once more to signal the start of delivering real values. */
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handler(context, UPVEC_START_REAL_VALUES_CP, UPVEC_START_REAL_VALUES_CP,
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count, row-valueColumns, valueColumns, pErrorCode);
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if(U_FAILURE(*pErrorCode)) {
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return;
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}
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/*
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* Move vector contents up to a contiguous array with only unique
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* vector values, and call the handler function for each vector.
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*
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* This destroys the Properties Vector structure and replaces it
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* with an array of just vector values.
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*/
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row=pv->v;
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count=-valueColumns;
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for(i=0; i<rows; ++i) {
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/* fetch these first before memmove() may overwrite them */
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start=(UChar32)row[0];
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limit=(UChar32)row[1];
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/* add a new values vector if it is different from the current one */
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if(count<0 || 0!=uprv_memcmp(row+2, pv->v+count, valueColumns*4)) {
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count+=valueColumns;
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uprv_memmove(pv->v+count, row+2, valueColumns*4);
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}
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if(start<UPVEC_FIRST_SPECIAL_CP) {
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handler(context, start, limit-1, count, pv->v+count, valueColumns, pErrorCode);
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if(U_FAILURE(*pErrorCode)) {
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return;
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}
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}
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row+=columns;
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}
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/* count is at the beginning of the last vector, add one to include that last vector */
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pv->rows=count/valueColumns+1;
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}
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U_CAPI const uint32_t * U_EXPORT2
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upvec_getArray(const UPropsVectors *pv, int32_t *pRows, int32_t *pColumns) {
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if(!pv->isCompacted) {
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return NULL;
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}
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if(pRows!=NULL) {
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*pRows=pv->rows;
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}
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if(pColumns!=NULL) {
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*pColumns=pv->columns-2;
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}
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return pv->v;
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}
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U_CAPI uint32_t * U_EXPORT2
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upvec_cloneArray(const UPropsVectors *pv,
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int32_t *pRows, int32_t *pColumns, UErrorCode *pErrorCode) {
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uint32_t *clonedArray;
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int32_t byteLength;
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if(U_FAILURE(*pErrorCode)) {
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return NULL;
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}
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if(!pv->isCompacted) {
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*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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byteLength=pv->rows*(pv->columns-2)*4;
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clonedArray=(uint32_t *)uprv_malloc(byteLength);
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if(clonedArray==NULL) {
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*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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uprv_memcpy(clonedArray, pv->v, byteLength);
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if(pRows!=NULL) {
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*pRows=pv->rows;
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}
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if(pColumns!=NULL) {
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*pColumns=pv->columns-2;
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}
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return clonedArray;
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}
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U_CAPI UTrie2 * U_EXPORT2
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upvec_compactToUTrie2WithRowIndexes(UPropsVectors *pv, UErrorCode *pErrorCode) {
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UPVecToUTrie2Context toUTrie2={ NULL };
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upvec_compact(pv, upvec_compactToUTrie2Handler, &toUTrie2, pErrorCode);
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utrie2_freeze(toUTrie2.trie, UTRIE2_16_VALUE_BITS, pErrorCode);
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if(U_FAILURE(*pErrorCode)) {
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utrie2_close(toUTrie2.trie);
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toUTrie2.trie=NULL;
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}
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return toUTrie2.trie;
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}
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/*
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* TODO(markus): Add upvec_16BitsToUTrie2() function that enumerates all rows, extracts
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* some 16-bit field and builds and returns a UTrie2.
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*/
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U_CAPI void U_CALLCONV
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upvec_compactToUTrie2Handler(void *context,
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UChar32 start, UChar32 end,
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int32_t rowIndex, uint32_t *row, int32_t columns,
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UErrorCode *pErrorCode) {
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UPVecToUTrie2Context *toUTrie2=(UPVecToUTrie2Context *)context;
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if(start<UPVEC_FIRST_SPECIAL_CP) {
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utrie2_setRange32(toUTrie2->trie, start, end, (uint32_t)rowIndex, TRUE, pErrorCode);
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} else {
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switch(start) {
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case UPVEC_INITIAL_VALUE_CP:
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toUTrie2->initialValue=rowIndex;
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break;
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case UPVEC_ERROR_VALUE_CP:
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|
toUTrie2->errorValue=rowIndex;
|
|
break;
|
|
case UPVEC_START_REAL_VALUES_CP:
|
|
toUTrie2->maxValue=rowIndex;
|
|
if(rowIndex>0xffff) {
|
|
/* too many rows for a 16-bit trie */
|
|
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
|
|
} else {
|
|
toUTrie2->trie=utrie2_open(toUTrie2->initialValue,
|
|
toUTrie2->errorValue, pErrorCode);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|