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50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#define IFACTOR 4
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void
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dcopy(char *chardest, char *charsrc, int size)
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{
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register int *src, *dest, intcount ;
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int startcharcpy, intoffset, numints2cpy, i ;
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numints2cpy = size >> 2 ;
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startcharcpy = numints2cpy << 2 ;
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intcount = numints2cpy & ~(IFACTOR-1) ;
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intoffset = numints2cpy - intcount ;
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src = (int *)(((int) charsrc) + intcount*sizeof(int*)) ;
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dest = (int *)(((int) chardest) + intcount*sizeof(int*)) ;
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/* copy the ints */
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switch(intoffset)
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do
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{
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case 0: dest[3] = src[3] ;
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case 3: dest[2] = src[2] ;
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case 2: dest[1] = src[1] ;
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case 1: dest[0] = src[0] ;
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intcount -= IFACTOR ;
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dest -= IFACTOR ;
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src -= IFACTOR ;
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} while (intcount >= 0) ;
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/* copy the chars left over by the int copy at the end */
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for(i=startcharcpy ; i<size ; i++)
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chardest[i] = charsrc[i] ;
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}
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