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Now calls memset (avoids code duplication).

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jshepher
2004-12-04 00:51:09 +00:00
parent 5ed58ad13e
commit c685985dbf
2 changed files with 6 additions and 66 deletions
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49
libnix/sources/nix/misc/bcopy.c
View File

@ -1,52 +1,9 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
/* This is a _fast_ block move routine! */ /* This is a _fast_ block move routine! */
void bcopy(const void *s1,void *s2,size_t n) void bcopy(const void *s1,void *s2,size_t n)
{ size_t m; {
if(!n) memcpy(s2, s1, n);
return;
if(s2<s1)
{ if(n>15)
{ if((long)s1&1)
{ *((char *)s2)++=*((char *)s1)++;
n--; }
if(!((long)s2&1))
{ if((long)s1&2)
{ *((short *)s2)++=*((short *)s1)++;
n-=2; }
for(m=n/(8*sizeof(long));m;--m)
{ *((long *)s2)++=*((long *)s1)++; *((long *)s2)++=*((long *)s1)++;
*((long *)s2)++=*((long *)s1)++; *((long *)s2)++=*((long *)s1)++;
*((long *)s2)++=*((long *)s1)++; *((long *)s2)++=*((long *)s1)++;
*((long *)s2)++=*((long *)s1)++; *((long *)s2)++=*((long *)s1)++; }
n&=8*sizeof(long)-1;
for(m=n/sizeof(long);m;--m)
*((long *)s2)++=*((long *)s1)++;
n&=sizeof(long)-1; }
if(!n) return;
} do;while(*((char *)s2)++=*((char *)s1)++,--n);
}else
{ (char *)s1+=n;
(char *)s2+=n;
if(n>15)
{ if((long)s1&1)
{ *--((char *)s2)=*--((char *)s1);
n--; }
if(!((long)s2&1))
{ if((long)s1&2)
{ *--((short *)s2)=*--((short *)s1);
n-=2; }
for(m=n/(8*sizeof(long));m;--m)
{ *--((long *)s2)=*--((long *)s1); *--((long *)s2)=*--((long *)s1);
*--((long *)s2)=*--((long *)s1); *--((long *)s2)=*--((long *)s1);
*--((long *)s2)=*--((long *)s1); *--((long *)s2)=*--((long *)s1);
*--((long *)s2)=*--((long *)s1); *--((long *)s2)=*--((long *)s1); }
n&=8*sizeof(long)-1;
for(m=n/sizeof(long);m;--m)
*--((long *)s2)=*--((long *)s1);
n&=sizeof(long)-1; }
if(!n) return;
} do;while(*--((char *)s2)=*--((char *)s1),--n);
}
} }

23
libnix/sources/nix/misc/bzero.c
View File

@ -1,23 +1,6 @@
#include <string.h> #include <memory.h>
void bzero(void *b,size_t n) void bzero(void *b,size_t n)
{ size_t m; {
if(!n) memset(b, 0, n);
return;
if(n>15)
{ if((long)b&1)
{ *((char *)b)++=0;
n--; }
if((long)b&2)
{ *((short *)b)++=0;
n-=2; }
for(m=n/(8*sizeof(long));m;--m)
{ *((long *)b)++=0; *((long *)b)++=0; *((long *)b)++=0; *((long *)b)++=0;
*((long *)b)++=0; *((long *)b)++=0; *((long *)b)++=0; *((long *)b)++=0; }
n&=8*sizeof(long)-1;
for(m=n/sizeof(long);m;--m)
*((long *)b)++=0;
if((n&=sizeof(long)-1)==0) return;
}
do;while(*((char *)b)++=0,--n);
} }