summaryrefslogtreecommitdiffstats
path: root/exfat/libexfat/byteorder.h
diff options
context:
space:
mode:
Diffstat (limited to 'exfat/libexfat/byteorder.h')
-rw-r--r--exfat/libexfat/byteorder.h68
1 files changed, 68 insertions, 0 deletions
diff --git a/exfat/libexfat/byteorder.h b/exfat/libexfat/byteorder.h
new file mode 100644
index 000000000..472cb487c
--- /dev/null
+++ b/exfat/libexfat/byteorder.h
@@ -0,0 +1,68 @@
+/*
+ byteorder.h (12.01.10)
+ Endianness stuff. exFAT uses little-endian byte order.
+
+ Free exFAT implementation.
+ Copyright (C) 2010-2015 Andrew Nayenko
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef BYTEORDER_H_INCLUDED
+#define BYTEORDER_H_INCLUDED
+
+#include "platform.h"
+#include <stdint.h>
+#include <stddef.h>
+
+typedef struct { uint16_t __u16; } le16_t;
+typedef struct { uint32_t __u32; } le32_t;
+typedef struct { uint64_t __u64; } le64_t;
+
+#if EXFAT_BYTE_ORDER == EXFAT_LITTLE_ENDIAN
+
+static inline uint16_t le16_to_cpu(le16_t v) { return v.__u16; }
+static inline uint32_t le32_to_cpu(le32_t v) { return v.__u32; }
+static inline uint64_t le64_to_cpu(le64_t v) { return v.__u64; }
+
+static inline le16_t cpu_to_le16(uint16_t v) { le16_t t = {v}; return t; }
+static inline le32_t cpu_to_le32(uint32_t v) { le32_t t = {v}; return t; }
+static inline le64_t cpu_to_le64(uint64_t v) { le64_t t = {v}; return t; }
+
+typedef size_t bitmap_t;
+
+#elif EXFAT_BYTE_ORDER == EXFAT_BIG_ENDIAN
+
+static inline uint16_t le16_to_cpu(le16_t v)
+ { return exfat_bswap16(v.__u16); }
+static inline uint32_t le32_to_cpu(le32_t v)
+ { return exfat_bswap32(v.__u32); }
+static inline uint64_t le64_to_cpu(le64_t v)
+ { return exfat_bswap64(v.__u64); }
+
+static inline le16_t cpu_to_le16(uint16_t v)
+ { le16_t t = {exfat_bswap16(v)}; return t; }
+static inline le32_t cpu_to_le32(uint32_t v)
+ { le32_t t = {exfat_bswap32(v)}; return t; }
+static inline le64_t cpu_to_le64(uint64_t v)
+ { le64_t t = {exfat_bswap64(v)}; return t; }
+
+typedef unsigned char bitmap_t;
+
+#else
+#error Wow! You have a PDP machine?!
+#endif
+
+#endif /* ifndef BYTEORDER_H_INCLUDED */