patch-2.4.20 linux-2.4.20/fs/befs/endian.h

• Lines: 127
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/fs/befs/endian.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/fs/befs/endian.h linux-2.4.20/fs/befs/endian.h
@@ -0,0 +1,126 @@
+/*
+ * linux/fs/befs/endian.h
+ *
+ * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
+ *
+ * Partially based on similar funtions in the sysv driver.
+ */
+
+#ifndef LINUX_BEFS_ENDIAN
+#define LINUX_BEFS_ENDIAN
+
+#include <linux/byteorder/generic.h>
+#include "befs_fs.h"
+
+static inline u64
+fs64_to_cpu(const struct super_block *sb, u64 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return le64_to_cpu(n);
+	else
+		return be64_to_cpu(n);
+}
+
+static inline u64
+cpu_to_fs64(const struct super_block *sb, u64 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return cpu_to_le64(n);
+	else
+		return cpu_to_be64(n);
+}
+
+static inline u32
+fs32_to_cpu(const struct super_block *sb, u32 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return le32_to_cpu(n);
+	else
+		return be32_to_cpu(n);
+}
+
+static inline u32
+cpu_to_fs32(const struct super_block *sb, u32 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return cpu_to_le32(n);
+	else
+		return cpu_to_be32(n);
+}
+
+static inline u16
+fs16_to_cpu(const struct super_block *sb, u16 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return le16_to_cpu(n);
+	else
+		return be16_to_cpu(n);
+}
+
+static inline u16
+cpu_to_fs16(const struct super_block *sb, u16 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return cpu_to_le16(n);
+	else
+		return cpu_to_be16(n);
+}
+
+/* Composite types below here */
+
+static inline befs_block_run
+fsrun_to_cpu(const struct super_block *sb, befs_block_run n)
+{
+	befs_block_run run;
+
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) {
+		run.allocation_group = le32_to_cpu(n.allocation_group);
+		run.start = le16_to_cpu(n.start);
+		run.len = le16_to_cpu(n.len);
+	} else {
+		run.allocation_group = be32_to_cpu(n.allocation_group);
+		run.start = be16_to_cpu(n.start);
+		run.len = be16_to_cpu(n.len);
+	}
+	return run;
+}
+
+static inline befs_block_run
+cpu_to_fsrun(const struct super_block *sb, befs_block_run n)
+{
+	befs_block_run run;
+
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) {
+		run.allocation_group = cpu_to_le32(n.allocation_group);
+		run.start = cpu_to_le16(n.start);
+		run.len = cpu_to_le16(n.len);
+	} else {
+		run.allocation_group = cpu_to_be32(n.allocation_group);
+		run.start = cpu_to_be16(n.start);
+		run.len = cpu_to_be16(n.len);
+	}
+	return run;
+}
+
+static inline befs_data_stream
+fsds_to_cpu(const struct super_block *sb, befs_data_stream n)
+{
+	befs_data_stream data;
+	int i;
+
+	for (i = 0; i < BEFS_NUM_DIRECT_BLOCKS; ++i)
+		data.direct[i] = fsrun_to_cpu(sb, n.direct[i]);
+
+	data.max_direct_range = fs64_to_cpu(sb, n.max_direct_range);
+	data.indirect = fsrun_to_cpu(sb, n.indirect);
+	data.max_indirect_range = fs64_to_cpu(sb, n.max_indirect_range);
+	data.double_indirect = fsrun_to_cpu(sb, n.double_indirect);
+	data.max_double_indirect_range = fs64_to_cpu(sb,
+						     n.
+						     max_double_indirect_range);
+	data.size = fs64_to_cpu(sb, n.size);
+
+	return data;
+}
+
+#endif				//LINUX_BEFS_ENDIAN