Make swab(3) inline prior to API 28.
Test: make checkbuild
Bug: https://stackoverflow.com/q/54392471/632035
Change-Id: Iaeb55231ea2395d7e1e31be63034f5db19025060
diff --git a/libc/include/android/legacy_unistd_inlines.h b/libc/include/android/legacy_unistd_inlines.h
new file mode 100644
index 0000000..4a5206b
--- /dev/null
+++ b/libc/include/android/legacy_unistd_inlines.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <sys/cdefs.h>
+
+#if __ANDROID_API__ < 28
+
+#define __BIONIC_SWAB_INLINE static __inline
+#include <bits/swab.h>
+
+#endif
diff --git a/libc/include/bits/swab.h b/libc/include/bits/swab.h
new file mode 100644
index 0000000..63281b6
--- /dev/null
+++ b/libc/include/bits/swab.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#if !defined(__BIONIC_SWAB_INLINE)
+#define __BIONIC_SWAB_INLINE static __inline
+#endif
+
+__BEGIN_DECLS
+
+__BIONIC_SWAB_INLINE void swab(const void* __void_src, void* __void_dst, ssize_t __byte_count) {
+ const uint8_t* __src = __BIONIC_CAST(static_cast, const uint8_t*, __void_src);
+ uint8_t* __dst = __BIONIC_CAST(static_cast, uint8_t*, __void_dst);
+ while (__byte_count > 1) {
+ uint8_t x = *__src++;
+ uint8_t y = *__src++;
+ *__dst++ = y;
+ *__dst++ = x;
+ __byte_count -= 2;
+ }
+}
+
+__END_DECLS
diff --git a/libc/include/unistd.h b/libc/include/unistd.h
index aaa8f22..e360421 100644
--- a/libc/include/unistd.h
+++ b/libc/include/unistd.h
@@ -313,7 +313,9 @@
int getdomainname(char* __buf, size_t __buf_size) __INTRODUCED_IN(26);
int setdomainname(const char* __name, size_t __n) __INTRODUCED_IN(26);
+#if __ANDROID_API__ >= 28
void swab(const void* __src, void* __dst, ssize_t __byte_count) __INTRODUCED_IN(28);
+#endif
#if defined(__BIONIC_INCLUDE_FORTIFY_HEADERS)
#define _UNISTD_H_
@@ -322,3 +324,5 @@
#endif
__END_DECLS
+
+#include <android/legacy_unistd_inlines.h>