Clean up the <libgen.h> implementation a little, bring in tests.
Most of these tests were in system/extras, but I've added more to cover other
cases explicitly mentioned by POSIX.
Change-Id: I5e8d77e4179028d77306935cceadbb505515dcde
diff --git a/tests/libgen_test.cpp b/tests/libgen_test.cpp
new file mode 100644
index 0000000..c2c01f6
--- /dev/null
+++ b/tests/libgen_test.cpp
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include <libgen.h>
+
+#include <errno.h>
+
+static void TestBasename(const char* in, const char* expected_out) {
+ char* writable_in = (in != NULL) ? strdup(in) : NULL;
+ errno = 0;
+ const char* out = basename(&writable_in[0]);
+ ASSERT_STREQ(expected_out, out) << in;
+ ASSERT_EQ(0, errno) << in;
+ free(writable_in);
+}
+
+static void TestDirname(const char* in, const char* expected_out) {
+ char* writable_in = (in != NULL) ? strdup(in) : NULL;
+ errno = 0;
+ const char* out = dirname(&writable_in[0]);
+ ASSERT_STREQ(expected_out, out) << in;
+ ASSERT_EQ(0, errno) << in;
+ free(writable_in);
+}
+
+TEST(libgen, basename) {
+ TestBasename(NULL, ".");
+ TestBasename("", ".");
+ TestBasename("/usr/lib", "lib");
+ TestBasename("/usr/", "usr");
+ TestBasename("usr", "usr");
+ TestBasename("/", "/");
+ TestBasename(".", ".");
+ TestBasename("..", "..");
+ TestBasename("///", "/");
+ TestBasename("//usr//lib//", "lib");
+}
+
+TEST(libgen, dirname) {
+ TestDirname(NULL, ".");
+ TestDirname("", ".");
+ TestDirname("/usr/lib", "/usr");
+ TestDirname("/usr/", "/");
+ TestDirname("usr", ".");
+ TestDirname(".", ".");
+ TestDirname("..", ".");
+ TestDirname("/", "/");
+}
+
+#if __BIONIC__
+
+static void TestBasename(const char* in, const char* expected_out, int expected_rc,
+ char* buf, size_t buf_size, int expected_errno) {
+ errno = 0;
+ int rc = basename_r(in, buf, buf_size);
+ ASSERT_EQ(expected_rc, rc) << in;
+ if (rc != -1 && buf != NULL) {
+ ASSERT_STREQ(expected_out, buf) << in;
+ }
+ ASSERT_EQ(expected_errno, errno) << in;
+}
+
+static void TestDirname(const char* in, const char* expected_out, int expected_rc,
+ char* buf, size_t buf_size, int expected_errno) {
+ errno = 0;
+ int rc = dirname_r(in, buf, buf_size);
+ ASSERT_EQ(expected_rc, rc) << in;
+ if (rc != -1 && buf != NULL) {
+ ASSERT_STREQ(expected_out, buf) << in;
+ }
+ ASSERT_EQ(expected_errno, errno) << in;
+}
+
+TEST(libgen, basename_r) {
+ char buf[256];
+ TestBasename("", ".", 1, NULL, 0, 0);
+ TestBasename("", ".", -1, buf, 0, ERANGE);
+ TestBasename("", ".", -1, buf, 1, ERANGE);
+ TestBasename("", ".", 1, buf, 2, 0);
+ TestBasename("", ".", 1, buf, sizeof(buf), 0);
+ TestBasename("/usr/lib", "lib", 3, buf, sizeof(buf), 0);
+ TestBasename("/usr/", "usr", 3, buf, sizeof(buf), 0);
+ TestBasename("usr", "usr", 3, buf, sizeof(buf), 0);
+ TestBasename("/", "/", 1, buf, sizeof(buf), 0);
+ TestBasename(".", ".", 1, buf, sizeof(buf), 0);
+ TestBasename("..", "..", 2, buf, sizeof(buf), 0);
+}
+
+TEST(libgen, dirname_r) {
+ char buf[256];
+ TestDirname("", ".", 1, NULL, 0, 0);
+ TestDirname("", ".", -1, buf, 0, ERANGE);
+ TestDirname("", ".", -1, buf, 1, ERANGE);
+ TestDirname("", ".", 1, buf, 2, 0);
+ TestDirname("/usr/lib", "/usr", 4, buf, sizeof(buf), 0);
+ TestDirname("/usr/", "/", 1, buf, sizeof(buf), 0);
+ TestDirname("usr", ".", 1, buf, sizeof(buf), 0);
+ TestDirname(".", ".", 1, buf, sizeof(buf), 0);
+ TestDirname("..", ".", 1, buf, sizeof(buf), 0);
+}
+
+#endif