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60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/* Copyright (c) 2000 TXT DataKonsult Ab & Monty Program Ab
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Copyright (c) 2009-2011, Monty Program Ab
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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#define IFACTOR 4
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void 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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