mbuf: new module

1 files changed, 222 insertions, 0 deletions

diff --git a/test/test_mbuf.c b/test/test_mbuf.c
new file mode 100644
index 0000000..6b3f90f
--- /dev/null
+++ b/test/test_mbuf.c
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2018 Richard Braun.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <check.h>
+#include <macros.h>
+#include <mbuf.h>
+
+static void
+test_regular(void)
+{
+    char mbuf_buf[32], buffer[8];
+    struct mbuf mbuf;
+    size_t size;
+    int error;
+
+    mbuf_init(&mbuf, mbuf_buf, sizeof(mbuf_buf));
+
+#define STRING "abcdef"
+    error = mbuf_push(&mbuf, STRING, STRLEN(STRING) + 1, false);
+    check(!error);
+#undef STRING
+
+#define STRING "xyz"
+    error = mbuf_push(&mbuf, STRING, STRLEN(STRING) + 1, false);
+    check(!error);
+#undef STRING
+
+#define STRING "abcdef"
+    size = sizeof(buffer);
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(!error);
+    check(size == (STRLEN(STRING) + 1));
+#undef STRING
+
+#define STRING "xyz"
+    size = sizeof(buffer);
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(!error);
+    check(size == (STRLEN(STRING) + 1));
+#undef STRING
+
+    size = sizeof(buffer);
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(error == EAGAIN);
+}
+
+static void
+test_write_full(void)
+{
+    char mbuf_buf[16], buffer[8];
+    struct mbuf mbuf;
+    size_t size;
+    int error;
+
+    mbuf_init(&mbuf, mbuf_buf, sizeof(mbuf_buf));
+
+#define STRING "abcdef"
+    error = mbuf_push(&mbuf, STRING, STRLEN(STRING) + 1, false);
+    check(!error);
+#undef STRING
+
+#define STRING "xyz"
+    error = mbuf_push(&mbuf, STRING, STRLEN(STRING) + 1, false);
+    check(error == EMSGSIZE);
+#undef STRING
+
+#define STRING "abcdef"
+    size = sizeof(buffer);
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(!error);
+    check(size == (STRLEN(STRING) + 1));
+#undef STRING
+
+    size = sizeof(buffer);
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(error == EAGAIN);
+}
+
+static void
+test_overwrite(void)
+{
+    char mbuf_buf[16], buffer[8];
+    struct mbuf mbuf;
+    size_t size;
+    int error;
+
+    mbuf_init(&mbuf, mbuf_buf, sizeof(mbuf_buf));
+
+#define STRING "abcdef"
+    error = mbuf_push(&mbuf, STRING, STRLEN(STRING) + 1, true);
+    check(!error);
+#undef STRING
+
+#define STRING "xyz"
+    error = mbuf_push(&mbuf, STRING, STRLEN(STRING) + 1, true);
+    check(!error);
+#undef STRING
+
+#define STRING "xyz"
+    size = sizeof(buffer);
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(!error);
+    check(size == (STRLEN(STRING) + 1));
+#undef STRING
+
+    size = sizeof(buffer);
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(error == EAGAIN);
+}
+
+static void
+test_msg_too_big(void)
+{
+    char mbuf_buf[8], buffer[8];
+    struct mbuf mbuf;
+    size_t size;
+    int error;
+
+    mbuf_init(&mbuf, mbuf_buf, sizeof(mbuf_buf));
+
+#define STRING "abcdef"
+    error = mbuf_push(&mbuf, STRING, STRLEN(STRING) + 1, true);
+    check(error == EMSGSIZE);
+#undef STRING
+
+    size = sizeof(buffer);
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(error == EAGAIN);
+}
+
+static void
+test_msg_far_too_big(void)
+{
+    char mbuf_buf[8], buffer[8];
+    struct mbuf mbuf;
+    size_t size;
+    int error;
+
+    if (sizeof(size_t) <= sizeof(uint32_t)) {
+        fprintf(stderr, "warning: %s disabled\n", __func__);
+        return;
+    }
+
+    mbuf_init(&mbuf, mbuf_buf, (size_t)1 << 36);
+
+#define STRING "abcdef"
+    size = (size_t)1 << 32;
+    error = mbuf_push(&mbuf, STRING, size, true);
+    check(error == EMSGSIZE);
+#undef STRING
+
+    size = sizeof(buffer);
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(error == EAGAIN);
+}
+
+static void
+test_peak(void)
+{
+    char mbuf_buf[16], buffer[8];
+    struct mbuf mbuf;
+    size_t size;
+    int error;
+
+    mbuf_init(&mbuf, mbuf_buf, sizeof(mbuf_buf));
+
+#define STRING "abcdef"
+    error = mbuf_push(&mbuf, STRING, STRLEN(STRING) + 1, true);
+    check(!error);
+#undef STRING
+
+#define STRING "abcdef"
+    size = 0;
+    error = mbuf_pop(&mbuf, NULL, &size);
+    check((error == EMSGSIZE) && (size == (STRLEN(STRING) + 1)));
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(!error && (size == (STRLEN(STRING) + 1)));
+#undef STRING
+
+    size = sizeof(buffer);
+    error = mbuf_pop(&mbuf, buffer, &size);
+    check(error == EAGAIN);
+}
+
+int
+main(void)
+{
+    test_regular();
+    test_write_full();
+    test_overwrite();
+    test_msg_too_big();
+    test_msg_far_too_big();
+    test_peak();
+
+    return EXIT_SUCCESS;
+}