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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [fs/] [ufs/] [swab.h] - Rev 1765
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/* * linux/fs/ufs/swab.h * * Copyright (C) 1997, 1998 Francois-Rene Rideau <fare@tunes.org> * Copyright (C) 1998 Jakub Jelinek <jj@ultra.linux.cz> * Copyright (C) 2001 Christoph Hellwig <hch@infradead.org> */ #ifndef _UFS_SWAB_H #define _UFS_SWAB_H /* * Notes: * HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes * in case there are ufs implementations that have strange bytesexes, * you'll need to modify code here as well as in ufs_super.c and ufs_fs.h * to support them. */ enum { BYTESEX_LE, BYTESEX_BE }; static __inline u64 fs64_to_cpu(struct super_block *sbp, u64 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return le64_to_cpu(n); else return be64_to_cpu(n); } static __inline u64 cpu_to_fs64(struct super_block *sbp, u64 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return cpu_to_le64(n); else return cpu_to_be64(n); } static __inline u32 fs64_add(struct super_block *sbp, u32 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le64(le64_to_cpu(*n)+d); else return *n = cpu_to_be64(be64_to_cpu(*n)+d); } static __inline u32 fs64_sub(struct super_block *sbp, u32 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le64(le64_to_cpu(*n)-d); else return *n = cpu_to_be64(be64_to_cpu(*n)-d); } static __inline u32 fs32_to_cpu(struct super_block *sbp, u32 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return le32_to_cpu(n); else return be32_to_cpu(n); } static __inline u32 cpu_to_fs32(struct super_block *sbp, u32 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return cpu_to_le32(n); else return cpu_to_be32(n); } static __inline u32 fs32_add(struct super_block *sbp, u32 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le32(le32_to_cpu(*n)+d); else return *n = cpu_to_be32(be32_to_cpu(*n)+d); } static __inline u32 fs32_sub(struct super_block *sbp, u32 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le32(le32_to_cpu(*n)-d); else return *n = cpu_to_be32(be32_to_cpu(*n)-d); } static __inline u16 fs16_to_cpu(struct super_block *sbp, u16 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return le16_to_cpu(n); else return be16_to_cpu(n); } static __inline u16 cpu_to_fs16(struct super_block *sbp, u16 n) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return cpu_to_le16(n); else return cpu_to_be16(n); } static __inline u16 fs16_add(struct super_block *sbp, u16 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le16(le16_to_cpu(*n)+d); else return *n = cpu_to_be16(be16_to_cpu(*n)+d); } static __inline u16 fs16_sub(struct super_block *sbp, u16 *n, int d) { if (sbp->u.ufs_sb.s_bytesex == BYTESEX_LE) return *n = cpu_to_le16(le16_to_cpu(*n)-d); else return *n = cpu_to_be16(be16_to_cpu(*n)-d); } #endif /* _UFS_SWAB_H */