aapt: move qsort_r_compat here as it is sole client
This code is only used on the host for MacOS X compatibility.
Apparently, glibc and Apple's libc disagree on the parameter
ordering.
Change-Id: I214edcf2870b6ac88316306ac5af43f1dadf9b2e
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/tools/aapt/qsort_r_compat.c b/tools/aapt/qsort_r_compat.c
new file mode 100644
index 0000000..2a8dbe8
--- /dev/null
+++ b/tools/aapt/qsort_r_compat.c
@@ -0,0 +1,90 @@
+/*
+ * 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 <stdlib.h>
+#include "qsort_r_compat.h"
+
+/*
+ * Note: This code is only used on the host, and is primarily here for
+ * Mac OS compatibility. Apparently, glibc and Apple's libc disagree on
+ * the parameter order for qsort_r.
+ */
+
+#if HAVE_BSD_QSORT_R
+
+/*
+ * BSD qsort_r parameter order is as we have defined here.
+ */
+
+void qsort_r_compat(void* base, size_t nel, size_t width, void* thunk,
+ int (*compar)(void*, const void* , const void*)) {
+ qsort_r(base, nel, width, thunk, compar);
+}
+
+#elif HAVE_GNU_QSORT_R
+
+/*
+ * GNU qsort_r parameter order places the thunk parameter last.
+ */
+
+struct compar_data {
+ void* thunk;
+ int (*compar)(void*, const void* , const void*);
+};
+
+static int compar_wrapper(const void* a, const void* b, void* data) {
+ struct compar_data* compar_data = (struct compar_data*)data;
+ return compar_data->compar(compar_data->thunk, a, b);
+}
+
+void qsort_r_compat(void* base, size_t nel, size_t width, void* thunk,
+ int (*compar)(void*, const void* , const void*)) {
+ struct compar_data compar_data;
+ compar_data.thunk = thunk;
+ compar_data.compar = compar;
+ qsort_r(base, nel, width, compar_wrapper, &compar_data);
+}
+
+#else
+
+/*
+ * Emulate qsort_r using thread local storage to access the thunk data.
+ */
+
+#include <cutils/threads.h>
+
+static thread_store_t compar_data_key = THREAD_STORE_INITIALIZER;
+
+struct compar_data {
+ void* thunk;
+ int (*compar)(void*, const void* , const void*);
+};
+
+static int compar_wrapper(const void* a, const void* b) {
+ struct compar_data* compar_data = (struct compar_data*)thread_store_get(&compar_data_key);
+ return compar_data->compar(compar_data->thunk, a, b);
+}
+
+void qsort_r_compat(void* base, size_t nel, size_t width, void* thunk,
+ int (*compar)(void*, const void* , const void*)) {
+ struct compar_data compar_data;
+ compar_data.thunk = thunk;
+ compar_data.compar = compar;
+ thread_store_set(&compar_data_key, &compar_data, NULL);
+ qsort(base, nel, width, compar_wrapper);
+}
+
+#endif