summaryrefslogtreecommitdiff
path: root/lib/memmove.c
diff options
context:
space:
mode:
authorAda Christine <adachristine18@gmail.com>2021-03-29 01:41:50 +0000
committerAda Christine <adachristine18@gmail.com>2021-03-29 01:41:50 +0000
commit42c6af83ec7e26983f1ecdefc81ea481a2354cb4 (patch)
treea096824a181eff4874e7840d148f3e5a06e3a5df /lib/memmove.c
parent56ec6c782455f7d8e4560d30ad6d2c3e1cd2738f (diff)
don't echo command spam
move common files to new source add VPATH to loader and kernel makefiles for common source
Diffstat (limited to 'lib/memmove.c')
-rw-r--r--lib/memmove.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/memmove.c b/lib/memmove.c
new file mode 100644
index 0000000..fd06bb6
--- /dev/null
+++ b/lib/memmove.c
@@ -0,0 +1,20 @@
+/* Public domain. */
+#include <stddef.h>
+
+void *
+memmove (void *dest, const void *src, size_t len)
+{
+ char *d = dest;
+ const char *s = src;
+ if (d < s)
+ while (len--)
+ *d++ = *s++;
+ else
+ {
+ const char *lasts = s + (len-1);
+ char *lastd = d + (len-1);
+ while (len--)
+ *lastd-- = *lasts--;
+ }
+ return dest;
+}