icuSources/tools/toolutil/propsvec.c

   1 /*
   2 *******************************************************************************
   3 *
   4 *   Copyright (C) 2002-2004, International Business Machines
   5 *   Corporation and others.  All Rights Reserved.
   6 *
   7 *******************************************************************************
   8 *   file name:  propsvec.c
   9 *   encoding:   US-ASCII
  10 *   tab size:   8 (not used)
  11 *   indentation:4
  12 *
  13 *   created on: 2002feb22
  14 *   created by: Markus W. Scherer
  15 *
  16 *   Store additional Unicode character properties in bit set vectors.
  17 */
  18
  19 #include <stdlib.h>
  20 #include "unicode/utypes.h"
  21 #include "cmemory.h"
  22 #include "utrie.h"
  23 #include "uarrsort.h"
  24 #include "propsvec.h"
  25
  26 static uint32_t *
  27 _findRow(uint32_t *pv, UChar32 rangeStart) {
  28     uint32_t *row;
  29     int32_t *hdr;
  30     int32_t columns, i, start, limit, prevRow, rows;
  31
  32     hdr=(int32_t *)pv;
  33     columns=hdr[UPVEC_COLUMNS];
  34     limit=hdr[UPVEC_ROWS];
  35     prevRow=hdr[UPVEC_PREV_ROW];
  36     rows=hdr[UPVEC_ROWS];
  37     pv+=UPVEC_HEADER_LENGTH;
  38
  39     /* check the vicinity of the last-seen row */
  40     if(prevRow<rows) {
  41         row=pv+prevRow*columns;
  42         if(rangeStart>=(UChar32)row[0]) {
  43             if(rangeStart<(UChar32)row[1]) {
  44                 /* same row as last seen */
  45                 return row;
  46             } else if(
  47                 ++prevRow<rows &&
  48                 rangeStart>=(UChar32)(row+=columns)[0] && rangeStart<(UChar32)row[1]
  49             ) {
  50                 /* next row after the last one */
  51                 hdr[UPVEC_PREV_ROW]=prevRow;
  52                 return row;
  53             }
  54         }
  55     }
  56
  57     /* do a binary search for the start of the range */
  58     start=0;
  59     while(start<limit-1) {
  60         i=(start+limit)/2;
  61         row=pv+i*columns;
  62         if(rangeStart<(UChar32)row[0]) {
  63             limit=i;
  64         } else if(rangeStart<(UChar32)row[1]) {
  65             hdr[UPVEC_PREV_ROW]=i;
  66             return row;
  67         } else {
  68             start=i;
  69         }
  70     }
  71
  72     /* must be found because all ranges together always cover all of Unicode */
  73     hdr[UPVEC_PREV_ROW]=start;
  74     return pv+start*columns;
  75 }
  76
  77 U_CAPI uint32_t * U_EXPORT2
  78 upvec_open(int32_t columns, int32_t maxRows) {
  79     uint32_t *pv, *row;
  80     int32_t length;
  81
  82     if(columns<1 || maxRows<1) {
  83         return NULL;
  84     }
  85
  86     columns+=2; /* count range start and limit columns */
  87     length=UPVEC_HEADER_LENGTH+maxRows*columns;
  88     pv=(uint32_t *)uprv_malloc(length*4);
  89     if(pv!=NULL) {
  90         /* set header */
  91         pv[UPVEC_COLUMNS]=(uint32_t)columns;
  92         pv[UPVEC_MAXROWS]=(uint32_t)maxRows;
  93         pv[UPVEC_ROWS]=1;
  94         pv[UPVEC_PREV_ROW]=0;
  95
  96         /* set initial row */
  97         row=pv+UPVEC_HEADER_LENGTH;
  98         *row++=0;
  99         *row++=0x110000;
 100         columns-=2;
 101         do {
 102             *row++=0;
 103         } while(--columns>0);
 104     }
 105     return pv;
 106 }
 107
 108 U_CAPI void U_EXPORT2
 109 upvec_close(uint32_t *pv) {
 110     if(pv!=NULL) {
 111         uprv_free(pv);
 112     }
 113 }
 114
 115 U_CAPI UBool U_EXPORT2
 116 upvec_setValue(uint32_t *pv,
 117                UChar32 start, UChar32 limit,
 118                int32_t column,
 119                uint32_t value, uint32_t mask,
 120                UErrorCode *pErrorCode) {
 121     uint32_t *firstRow, *lastRow;
 122     int32_t columns;
 123     UBool splitFirstRow, splitLastRow;
 124
 125     /* argument checking */
 126     if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
 127         return FALSE;
 128     }
 129
 130     if( pv==NULL ||
 131         start<0 || start>limit || limit>0x110000 ||
 132         column<0 || (uint32_t)(column+1)>=pv[UPVEC_COLUMNS]
 133     ) {
 134         *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
 135         return FALSE;
 136     }
 137     if(start==limit) {
 138         /* empty range, nothing to do */
 139         return TRUE;
 140     }
 141
 142     /* initialize */
 143     columns=(int32_t)pv[UPVEC_COLUMNS];
 144     column+=2; /* skip range start and limit columns */
 145     value&=mask;
 146
 147     /* find the rows whose ranges overlap with the input range */
 148
 149     /* find the first row, always successful */
 150     firstRow=_findRow(pv, start);
 151
 152     /* find the last row, always successful */
 153     lastRow=firstRow;
 154     while(limit>(UChar32)lastRow[1]) {
 155         lastRow+=columns;
 156     }
 157
 158     /*
 159      * Rows need to be split if they partially overlap with the
 160      * input range (only possible for the first and last rows)
 161      * and if their value differs from the input value.
 162      */
 163     splitFirstRow= (UBool)(start!=(UChar32)firstRow[0] && value!=(firstRow[column]&mask));
 164     splitLastRow= (UBool)(limit!=(UChar32)lastRow[1] && value!=(lastRow[column]&mask));
 165
 166     /* split first/last rows if necessary */
 167     if(splitFirstRow || splitLastRow) {
 168         int32_t count, rows;
 169
 170         rows=(int32_t)pv[UPVEC_ROWS];
 171         if((rows+splitFirstRow+splitLastRow)>(int32_t)pv[UPVEC_MAXROWS]) {
 172             *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
 173             return FALSE;
 174         }
 175
 176         /* count the number of row cells to move after the last row, and move them */
 177         count = (int32_t)((pv+UPVEC_HEADER_LENGTH+rows*columns)-(lastRow+columns));
 178         if(count>0) {
 179             uprv_memmove(
 180                 lastRow+(1+splitFirstRow+splitLastRow)*columns,
 181                 lastRow+columns,
 182                 count*4);
 183         }
 184         pv[UPVEC_ROWS]=rows+splitFirstRow+splitLastRow;
 185
 186         /* split the first row, and move the firstRow pointer to the second part */
 187         if(splitFirstRow) {
 188             /* copy all affected rows up one and move the lastRow pointer */
 189             count = (int32_t)((lastRow-firstRow)+columns);
 190             uprv_memmove(firstRow+columns, firstRow, count*4);
 191             lastRow+=columns;
 192
 193             /* split the range and move the firstRow pointer */
 194             firstRow[1]=firstRow[columns]=(uint32_t)start;
 195             firstRow+=columns;
 196         }
 197
 198         /* split the last row */
 199         if(splitLastRow) {
 200             /* copy the last row data */
 201             uprv_memcpy(lastRow+columns, lastRow, columns*4);
 202
 203             /* split the range and move the firstRow pointer */
 204             lastRow[1]=lastRow[columns]=(uint32_t)limit;
 205         }
 206     }
 207
 208     /* set the "row last seen" to the last row for the range */
 209     pv[UPVEC_PREV_ROW]=(uint32_t)((lastRow-(pv+UPVEC_HEADER_LENGTH))/columns);
 210
 211     /* set the input value in all remaining rows */
 212     firstRow+=column;
 213     lastRow+=column;
 214     mask=~mask;
 215     for(;;) {
 216         *firstRow=(*firstRow&mask)|value;
 217         if(firstRow==lastRow) {
 218             break;
 219         }
 220         firstRow+=columns;
 221     }
 222     return TRUE;
 223 }
 224
 225 U_CAPI uint32_t U_EXPORT2
 226 upvec_getValue(uint32_t *pv, UChar32 c, int32_t column) {
 227     uint32_t *row;
 228
 229     if(pv==NULL || c<0 || c>=0x110000) {
 230         return 0;
 231     }
 232     row=_findRow(pv, c);
 233     return row[2+column];
 234 }
 235
 236 U_CAPI uint32_t * U_EXPORT2
 237 upvec_getRow(uint32_t *pv, int32_t rowIndex,
 238              UChar32 *pRangeStart, UChar32 *pRangeLimit) {
 239     uint32_t *row;
 240     int32_t columns;
 241
 242     if(pv==NULL || rowIndex<0 || rowIndex>=(int32_t)pv[UPVEC_ROWS]) {
 243         return NULL;
 244     }
 245
 246     columns=(int32_t)pv[UPVEC_COLUMNS];
 247     row=pv+UPVEC_HEADER_LENGTH+rowIndex*columns;
 248     if(pRangeStart!=NULL) {
 249         *pRangeStart=row[0];
 250     }
 251     if(pRangeLimit!=NULL) {
 252         *pRangeLimit=row[1];
 253     }
 254     return row+2;
 255 }
 256
 257 static int32_t U_CALLCONV
 258 upvec_compareRows(const void *context, const void *l, const void *r) {
 259     const uint32_t *left=(const uint32_t *)l, *right=(const uint32_t *)r;
 260     const uint32_t *pv=(const uint32_t *)context;
 261     int32_t i, count, columns;
 262
 263     count=columns=(int32_t)pv[UPVEC_COLUMNS]; /* includes start/limit columns */
 264
 265     /* start comparing after start/limit but wrap around to them */
 266     i=2;
 267     do {
 268         if(left[i]!=right[i]) {
 269             return left[i]<right[i] ? -1 : 1;
 270         }
 271         if(++i==columns) {
 272             i=0;
 273         }
 274     } while(--count>0);
 275
 276     return 0;
 277 }
 278
 279 U_CAPI int32_t U_EXPORT2
 280 upvec_toTrie(uint32_t *pv, UNewTrie *trie, UErrorCode *pErrorCode) {
 281     uint32_t *row;
 282     int32_t columns, valueColumns, rows, count;
 283
 284     /* argument checking */
 285     if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
 286         return 0;
 287     }
 288
 289     if(pv==NULL || trie==NULL) {
 290         *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
 291         return 0;
 292     }
 293
 294     row=pv+UPVEC_HEADER_LENGTH;
 295     columns=(int32_t)pv[UPVEC_COLUMNS];
 296     rows=(int32_t)pv[UPVEC_ROWS];
 297
 298     /* sort the properties vectors to find unique vector values */
 299     if(rows>1) {
 300         uprv_sortArray(pv+UPVEC_HEADER_LENGTH, rows, columns*4,
 301                        upvec_compareRows, pv, FALSE, pErrorCode);
 302     }
 303     if(U_FAILURE(*pErrorCode)) {
 304         return 0;
 305     }
 306
 307     /*
 308      * Move vector contents up to a contiguous array with only unique
 309      * vector values, and set indexes to those values into the trie.
 310      *
 311      * This destroys the Properties Vector structure and replaces it
 312      * with an array of just vector values.
 313      */
 314     valueColumns=columns-2; /* not counting start & limit */
 315     count=-valueColumns;
 316
 317     do {
 318         /* add a new values vector if it is different from the current one */
 319         if(count<0 || 0!=uprv_memcmp(row+2, pv+count, valueColumns*4)) {
 320             count+=valueColumns;
 321             uprv_memmove(pv+count, row+2, valueColumns*4);
 322         }
 323
 324         if(count>0 && !utrie_setRange32(trie, (UChar32)row[0], (UChar32)row[1], (uint32_t)count, FALSE)) {
 325             *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
 326             return 0;
 327         }
 328
 329         row+=columns;
 330     } while(--rows>0);
 331
 332     return count+valueColumns;
 333 }