19990502 sourceware importbinu_ss_19990502

1 files changed, 35 insertions, 0 deletions

diff --git a/libiberty/bcopy.c b/libiberty/bcopy.c
new file mode 100644
index 00000000000..b655363d879
--- /dev/null
+++ b/libiberty/bcopy.c
@@ -0,0 +1,35 @@
+/* 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--;
+    }
+}