291 lines
7.7 KiB
C
291 lines
7.7 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 2002, 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 additional 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 "uprops.h"
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#include "propsvec.h"
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static uint32_t *
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_findRow(uint32_t *pv, uint32_t rangeStart) {
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uint32_t *row;
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int32_t columns, i, start, limit;
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columns=(int32_t)pv[UPVEC_COLUMNS];
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limit=(int32_t)pv[UPVEC_ROWS];
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pv+=UPVEC_HEADER_LENGTH;
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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+i*columns;
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if(rangeStart<row[0]) {
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limit=i;
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} else if(rangeStart<row[1]) {
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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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return pv+start*columns;
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}
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U_CFUNC uint32_t *
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upvec_open(int32_t columns, int32_t maxRows) {
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uint32_t *pv, *row;
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int32_t length;
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if(columns<1 || maxRows<1) {
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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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length=UPVEC_HEADER_LENGTH+maxRows*columns;
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pv=(uint32_t *)uprv_malloc(length*4);
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if(pv!=NULL) {
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/* set header */
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pv[UPVEC_COLUMNS]=(uint32_t)columns;
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pv[UPVEC_MAXROWS]=(uint32_t)maxRows;
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pv[UPVEC_ROWS]=1;
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pv[UPVEC_RESERVED]=0;
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/* set initial row */
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row=pv+UPVEC_HEADER_LENGTH;
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*row++=0;
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*row++=0x110000;
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columns-=2;
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do {
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*row++=0;
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} while(--columns>0);
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}
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return pv;
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}
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U_CFUNC void
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upvec_close(uint32_t *pv) {
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if(pv==NULL) {
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uprv_free(pv);
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}
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}
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U_CFUNC UBool
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upvec_setValue(uint32_t *pv,
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uint32_t start, uint32_t limit,
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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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UBool splitFirstRow, splitLastRow;
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/* argument checking */
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
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return FALSE;
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}
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if( pv==NULL ||
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start>limit || limit>0x110000 ||
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column<0 || (uint32_t)(column+1)>=pv[UPVEC_COLUMNS]
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) {
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*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return FALSE;
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}
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if(start==limit) {
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/* empty range, nothing to do */
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return TRUE;
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}
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/* initialize */
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columns=pv[UPVEC_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 row, always successful */
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firstRow=_findRow(pv, start);
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/* find the last row, always successful */
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lastRow=firstRow;
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while(limit>lastRow[1]) {
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lastRow+=columns;
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}
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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!=firstRow[0] && value!=(firstRow[column]&mask));
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splitLastRow= (UBool)(limit!=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=(int32_t)pv[UPVEC_ROWS];
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if((rows+splitFirstRow+splitLastRow)>(int32_t)pv[UPVEC_MAXROWS]) {
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*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
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return FALSE;
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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=(pv+UPVEC_HEADER_LENGTH+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[UPVEC_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=(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]=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]=limit;
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}
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}
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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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return TRUE;
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}
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U_CFUNC uint32_t *
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upvec_getRow(uint32_t *pv, int32_t rowIndex,
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uint32_t *pRangeStart, uint32_t *pRangeLimit) {
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uint32_t *row;
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int32_t columns;
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if(pv==NULL || rowIndex<0 || rowIndex>=(int32_t)pv[UPVEC_ROWS]) {
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return NULL;
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}
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columns=pv[UPVEC_COLUMNS];
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row=pv+UPVEC_HEADER_LENGTH+rowIndex*columns;
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if(pRangeStart!=NULL) {
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*pRangeStart=row[0];
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}
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if(pRangeLimit!=NULL) {
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*pRangeLimit=row[1];
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}
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return row+2;
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}
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static int
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upvec_compareRows(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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int32_t i, count, columns;
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count=columns=2+UPROPS_VECTOR_WORDS;
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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_CFUNC int32_t
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upvec_toTrie(uint32_t *pv, UNewTrie *trie, UErrorCode *pErrorCode) {
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uint32_t *row;
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int32_t columns, valueColumns, rows, count;
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/* argument checking */
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
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return 0;
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}
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if(pv==NULL || trie==NULL) {
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*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
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return 0;
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}
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row=pv+UPVEC_HEADER_LENGTH;
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columns=(int32_t)pv[UPVEC_COLUMNS];
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rows=(int32_t)pv[UPVEC_ROWS];
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/* sort the properties vectors to find unique vector values */
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if(rows>1) {
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qsort(pv+UPVEC_HEADER_LENGTH, rows, columns*4, upvec_compareRows);
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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 set indexes to those values into the trie.
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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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valueColumns=columns-2; /* not counting start & limit */
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count=-valueColumns;
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do {
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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+count, valueColumns*4)) {
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count+=valueColumns;
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uprv_memmove(pv+count, row+2, valueColumns*4);
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}
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if(count>0 && !utrie_setRange32(trie, (UChar32)row[0], (UChar32)row[1], (uint32_t)count, FALSE)) {
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*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
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return 0;
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}
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row+=columns;
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} while(--rows>0);
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return count+valueColumns;
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}
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