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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
tree1af963bfd8d3e55167b81def4207f175eaff3a56 /libiberty/bcopy.c
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19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'libiberty/bcopy.c')
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diff --git a/libiberty/bcopy.c b/libiberty/bcopy.c
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+/* bcopy -- copy memory regions of arbitary length
+
+NAME
+ bcopy -- copy memory regions of arbitrary length
+
+SYNOPSIS
+ void bcopy (char *in, char *out, int length)
+
+DESCRIPTION
+ Copy LENGTH bytes from memory region pointed to by IN to memory
+ region pointed to by OUT.
+
+BUGS
+ Significant speed improvements can be made in some cases by
+ implementing copies of multiple bytes simultaneously, or unrolling
+ the copy loop.
+
+*/
+
+void
+bcopy (src, dest, len)
+ register char *src, *dest;
+ int len;
+{
+ if (dest < src)
+ while (len--)
+ *dest++ = *src++;
+ else
+ {
+ char *lasts = src + (len-1);
+ char *lastd = dest + (len-1);
+ while (len--)
+ *(char *)lastd-- = *(char *)lasts--;
+ }
+}