mem: Add memswap() function

[ccan] / ccan / mem / test / api.c

diff --git a/ccan/mem/test/api.c b/ccan/mem/test/api.c
index a584c0f33e3b97a11974e55e51670991db4a6bdd..d820a38ddf35bd9ed68097d681ebf02bb8de40e0 100644 (file)
--- a/ccan/mem/test/api.c
+++ b/ccan/mem/test/api.c
@@ -1,6 +1,12 @@
+#include "config.h"
+
+#include <assert.h>
+
 #include <ccan/mem/mem.h>
 #include <ccan/tap/tap.h>
 
+#define SWAPSIZE       12
+
 int main(void)
 {
        char haystack1[] = "abcd\0efgh";
@@ -9,9 +15,10 @@ int main(void)
        char needle2[] = "d\0e";
        char scan1[] = "aaaab";
        char scan2[] = "\0\0\0b";
+       char tmp1[SWAPSIZE], tmp2[SWAPSIZE];
 
        /* This is how many tests you plan to run */
-       plan_tests(60);
+       plan_tests(62);
 
        ok1(memmem(haystack1, sizeof(haystack1), needle1, 2) == haystack1);
        ok1(memmem(haystack1, sizeof(haystack1), needle1, 3) == NULL);
@@ -96,6 +103,16 @@ int main(void)
        ok1(memoverlaps(haystack1 + 4, 7, haystack1, 5));
        ok1(!memoverlaps(haystack1 + 5, 6, haystack1, 5));
 
+       assert(sizeof(haystack1) <= SWAPSIZE);
+       assert(sizeof(haystack2) <= SWAPSIZE);
+       memset(tmp1, 0, sizeof(tmp1));
+       memset(tmp2, 0, sizeof(tmp2));
+       memcpy(tmp1, haystack1, sizeof(haystack1));
+       memcpy(tmp2, haystack2, sizeof(haystack2));
+       memswap(tmp1, tmp2, SWAPSIZE);
+       ok1(memcmp(tmp1, haystack2, sizeof(haystack2)) == 0);
+       ok1(memcmp(tmp2, haystack1, sizeof(haystack1)) == 0);
+
        /* This exits depending on whether all tests passed */
        return exit_status();
 }