user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/tests/bsd/getloadavg.c

@@ -0,0 +1,10 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+int main(void) {
+    double samples[3];
+    assert(getloadavg(samples, 3) != 0);
+    printf("%f %f %f\n", samples[0], samples[1], samples[2]);
+    return 0;
+}

user/include/mlibc/tests/bsd/ns_get_put.c

@@ -0,0 +1,21 @@
+#include <assert.h>
+#include <arpa/nameser.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+int main() {
+	uint8_t *buf = malloc(256);
+	uint16_t original16 = 4891;
+	uint32_t original32 = 4861984;
+	memset(buf, 0x0, sizeof(*buf));
+	ns_put16(original16, buf);
+	uint16_t result16 = ns_get16(buf);
+	assert(result16 == original16);
+	memset(buf, 0x0, sizeof(*buf));
+	ns_put32(original32, buf);
+	uint32_t result32 = ns_get32(buf);
+	assert(result32 == original32);
+	free(buf);
+	return 0;
+}

user/include/mlibc/tests/bsd/reallocarray.c

@@ -0,0 +1,7 @@
+#include <stdlib.h>
+
+int main() {
+	void *ret = reallocarray(NULL, 69, 0xCB7);
+	free(ret);
+	return !ret;
+}

user/include/mlibc/tests/bsd/sbrk.c

@@ -0,0 +1,11 @@
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int main() {
+	void *ret = sbrk(0);
+	assert(ret != (void *) -1);
+	assert(ret);
+
+	return 0;
+}

user/include/mlibc/tests/bsd/strl.c

@@ -0,0 +1,56 @@
+#include <assert.h>
+#include <string.h>
+
+int main() {
+	char buf[256];
+
+	/* Test copy to 0-sized buffer . */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcpy(buf, "xyz", 0) == 3);
+	assert(strcmp(buf, "") == 0);
+
+	/* Test normal copy. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcpy(buf, "xyz", sizeof(buf)) == 3);
+	assert(strcmp(buf, "xyz") == 0);
+
+	/* Test truncated copy. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcpy(buf, "abcdefabcdef", 10) == 12);
+	assert(strcmp(buf, "abcdefabc") == 0);
+
+	/* Test concat to 0-sized buffer. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcat(buf, "abc", 0) == 3);
+	assert(strcmp(buf, "") == 0);
+
+	/* Test concat to full buffer. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcat(buf, "abcde", 6) == 5);
+	assert(strcmp(buf, "abcde") == 0);
+	assert(strlcat(buf, "xyz", 5) == 8);
+	assert(strcmp(buf, "abcde") == 0);
+
+	/* Test normal concat. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcat(buf, "abc", sizeof(buf)) == 3);
+	assert(strcmp(buf, "abc") == 0);
+	assert(strlcat(buf, "xyz", sizeof(buf)) == 6);
+	assert(strcmp(buf, "abcxyz") == 0);
+
+	/* Test truncated concat. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcat(buf, "abcabc", 10) == 6);
+	assert(strcmp(buf, "abcabc") == 0);
+	assert(strlcat(buf, "xyzxyz", 10) == 12);
+	assert(strcmp(buf, "abcabcxyz") == 0);
+
+	/* Test truncated concat w/ truncated dst. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcat(buf, "abcabc", 10) == 6);
+	assert(strcmp(buf, "abcabc") == 0);
+	assert(strlcat(buf, "xyz", 4) == 7);
+	assert(strcmp(buf, "abcabc") == 0);
+
+	return 0;
+}