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-rw-r--r--test/string/tst-memmove.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/test/string/tst-memmove.c b/test/string/tst-memmove.c
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+++ b/test/string/tst-memmove.c
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+/*
+ * Copyright (C) 2016 Rene Nielsen <rene.nielsen@microsemi.com>
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <string.h>
+#include <stdio.h>
+
+#define LEN 1024
+
+int main(int argc, char *argv[])
+{
+ unsigned char a[LEN], exp;
+ int i, move_len, move_src, err = 0;
+
+ // Fill the array with increasing values from 0 to LEN - 1 (wrap is fine)
+ for (i = 0; i < LEN; i++) {
+ a[i] = i;
+ }
+
+ // move_src is the index into the array to move from.
+ // move_len is the number of indices to move. Here, we take the remainder.
+ move_src = LEN / 64;
+ move_len = LEN - move_src;
+
+ printf("Moving %d entries from index %d to 0\n", move_len, move_src);
+ memmove(a, &a[move_src], sizeof(a[0]) * move_len);
+
+ // Check that the memmove went well
+ for (i = 0; i < LEN; i++) {
+ // Expect that the first #move_len entries contain increasing values
+ // starting at #move_src and the last #move_src entries are untouched.
+ exp = i >= move_len ? i : i + move_src;
+ if (a[i] != exp) {
+ printf("Error: memmove() failed. Expected a[%d] = %u, got %u\n", i, exp, a[i]);
+ err = 1;
+ }
+ }
+
+ if (!err) {
+ printf("memmove() succeeded\n");
+ }
+
+ return err;
+}
+