summaryrefslogtreecommitdiff
path: root/gsl-1.9/utils/memmove.c
diff options
context:
space:
mode:
Diffstat (limited to 'gsl-1.9/utils/memmove.c')
-rw-r--r--gsl-1.9/utils/memmove.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/gsl-1.9/utils/memmove.c b/gsl-1.9/utils/memmove.c
new file mode 100644
index 0000000..c374698
--- /dev/null
+++ b/gsl-1.9/utils/memmove.c
@@ -0,0 +1,24 @@
+/* memmove.c -- copy memory.
+ Copy LENGTH bytes from SOURCE to DEST. Does not null-terminate.
+ In the public domain.
+ By David MacKenzie <djm@gnu.ai.mit.edu>. */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+void
+memmove (dest, source, length)
+ char *dest;
+ const char *source;
+ unsigned length;
+{
+ if (source < dest)
+ /* Moving from low mem to hi mem; start at end. */
+ for (source += length, dest += length; length; --length)
+ *--dest = *--source;
+ else if (source != dest)
+ /* Moving from hi mem to low mem; start at beginning. */
+ for (; length; --length)
+ *dest++ = *source++;
+}