add tests for libc memcmp

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/libc/test/run-memops-test.c b/libc/test/run-memops-test.c
index 7212d76..c848a1d 100644
--- a/libc/test/run-memops-test.c
+++ b/libc/test/run-memops-test.c
@@ -45,6 +45,7 @@
 
 int test_memset(char* buf, int c, size_t s);
 int test_memchr(const void *ptr, int c, size_t n, void* expected);
+int test_memcmp(const void *ptr1, const void *ptr2, size_t n, int expected);
 
 int test_memset(char* buf, int c, size_t s)
 {
@@ -63,3 +64,8 @@ int test_memchr(const void *ptr, int c, size_t n, void* expected)
 {
 	return(expected == memchr(ptr, c, n));
 }
+
+int test_memcmp(const void *ptr1, const void *ptr2, size_t n, int expected)
+{
+	return(expected == memcmp(ptr1, ptr2, n));
+}
diff --git a/libc/test/run-memops.c b/libc/test/run-memops.c
index cc107f7..ded21ae 100644
--- a/libc/test/run-memops.c
+++ b/libc/test/run-memops.c
@@ -23,6 +23,7 @@
 
 int test_memset(char* buf, int c, size_t s);
 int test_memchr(const void *ptr, int c, size_t n, void* expected);
+int test_memcmp(const void *ptr1, const void *ptr2, size_t n, int expected);
 
 int main(void)
 {
@@ -45,6 +46,9 @@ int main(void)
 	strncpy(buf, "Hello World!", 20);
 	assert(test_memchr(buf, 'o', strlen(buf), buf+4));
 	assert(test_memchr(buf, 'a', strlen(buf), NULL));
+
+	assert(test_memcmp(buf, "Hello World!", strlen(buf), 0));
+	assert(test_memcmp(buf, "Hfllow World", strlen(buf), -1));
 	free(buf);
 
 	return 0;