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memset.c
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C/C++ Source or Header
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1992-02-11
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596b
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35 lines
/* from Henry Spencer's stringlib */
#include <stddef.h>
#include <string.h>
/*
* memset - set bytes
*
* CHARBITS should be defined only if the compiler lacks "unsigned char".
* It should be a mask, e.g. 0377 for an 8-bit machine.
*/
#ifndef CHARBITS
# define UNSCHAR(c) ((unsigned char)(c))
#else
# define UNSCHAR(c) ((c)&CHARBITS)
#endif
void *
memset(s, ucharfill, size)
void * s;
register int ucharfill;
size_t size;
{
register char *scan;
register size_t n;
register int uc;
scan = (char *)s;
uc = UNSCHAR(ucharfill);
for (n = size; n > 0; n--)
*scan++ = uc;
return(s);
}