Libraries: Move to Userland/Libraries/

Userland/Libraries/LibC/endian.h

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. 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 HOLDER 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>
+
+__BEGIN_DECLS
+
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#define __PDP_ENDIAN 3412
+
+#if defined(__GNUC__) && defined(__BYTE_ORDER__)
+#    define __BYTE_ORDER __BYTE_ORDER__
+#else
+#    include <bits/endian.h>
+#endif
+
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+
+#    include <stdint.h>
+
+static __inline uint16_t __bswap16(uint16_t x)
+{
+    return __builtin_bswap16(x);
+}
+
+static __inline uint32_t __bswap32(uint32_t x)
+{
+    return __builtin_bswap32(x);
+}
+
+static __inline uint64_t __bswap64(uint64_t x)
+{
+    return __builtin_bswap64(x);
+}
+
+#    define LITTLE_ENDIAN __LITTLE_ENDIAN
+#    define BIG_ENDIAN __BIG_ENDIAN
+#    define PDP_ENDIAN __PDP_ENDIAN
+#    define BYTE_ORDER __BYTE_ORDER
+
+#    if __BYTE_ORDER == __LITTLE_ENDIAN
+#        define htole16(x) ((uint16_t)(x))
+#        define le16toh(x) ((uint16_t)(x))
+#        define letoh16(x) ((uint16_t)(x))
+#        define htole32(x) ((uint32_t)(x))
+#        define le32toh(x) ((uint32_t)(x))
+#        define letoh32(x) ((uint32_t)(x))
+#        define htole64(x) ((uint64_t)(x))
+#        define le64toh(x) ((uint64_t)(x))
+#        define letoh64(x) ((uint64_t)(x))
+#        define htobe16(x) (__builtin_bswap16(x))
+#        define be16toh(x) (__builtin_bswap16(x))
+#        define betoh16(x) (__builtin_bswap16(x))
+#        define htobe32(x) (__builtin_bswap32(x))
+#        define be32toh(x) (__builtin_bswap32(x))
+#        define betoh32(x) (__builtin_bswap32(x))
+#        define htobe64(x) (__builtin_bswap64(x))
+#        define be64toh(x) (__builtin_bswap64(x))
+#        define betoh64(x) (__builtin_bswap64(x))
+#    else
+#        define htole16(x) (__builtin_bswap16(x))
+#        define le16toh(x) (__builtin_bswap16(x))
+#        define letoh16(x) (__builtin_bswap16(x))
+#        define htole32(x) (__builtin_bswap32(x))
+#        define le32toh(x) (__builtin_bswap32(x))
+#        define letoh32(x) (__builtin_bswap32(x))
+#        define htole64(x) (__builtin_bswap64(x))
+#        define le64toh(x) (__builtin_bswap64(x))
+#        define letoh64(x) (__builtin_bswap64(x))
+#        define htobe16(x) ((uint16_t)(x))
+#        define be16toh(x) ((uint16_t)(x))
+#        define betoh16(x) ((uint16_t)(x))
+#        define htobe32(x) ((uint32_t)(x))
+#        define be32toh(x) ((uint32_t)(x))
+#        define betoh32(x) ((uint32_t)(x))
+#        define htobe64(x) ((uint64_t)(x))
+#        define be64toh(x) ((uint64_t)(x))
+#        define betoh64(x) ((uint64_t)(x))
+#    endif
+
+#endif
+
+__END_DECLS