108 lines
1.9 KiB
C
Executable File
108 lines
1.9 KiB
C
Executable File
/*
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* Greate deal of the code was taken from the kernel UBIFS implementation, and
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* this file contains some "glue" definitions.
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*/
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#ifndef __UBIFS_DEFS_H__
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#define __UBIFS_DEFS_H__
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#define t16(x) ({ \
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uint16_t __b = (x); \
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(__LITTLE_ENDIAN==__BYTE_ORDER) ? __b : bswap_16(__b); \
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})
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#define t32(x) ({ \
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uint32_t __b = (x); \
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(__LITTLE_ENDIAN==__BYTE_ORDER) ? __b : bswap_32(__b); \
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})
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#define t64(x) ({ \
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uint64_t __b = (x); \
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(__LITTLE_ENDIAN==__BYTE_ORDER) ? __b : bswap_64(__b); \
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})
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#define cpu_to_le16(x) ((__le16){t16(x)})
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#define cpu_to_le32(x) ((__le32){t32(x)})
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#define cpu_to_le64(x) ((__le64){t64(x)})
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#define le16_to_cpu(x) (t16((x)))
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#define le32_to_cpu(x) (t32((x)))
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#define le64_to_cpu(x) (t64((x)))
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#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
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#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
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#define min_t(t,x,y) ({ \
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typeof((x)) _x = (x); \
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typeof((y)) _y = (y); \
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(_x < _y) ? _x : _y; \
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})
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#define max_t(t,x,y) ({ \
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typeof((x)) _x = (x); \
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typeof((y)) _y = (y); \
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(_x > _y) ? _x : _y; \
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})
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#define unlikely(x) (x)
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#define ubifs_assert(x) ({})
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struct qstr
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{
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char *name;
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size_t len;
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};
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/**
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* fls - find last (most-significant) bit set
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* @x: the word to search
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*
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* This is defined the same way as ffs.
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* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
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*/
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static inline int fls(int x)
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{
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int r = 32;
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if (!x)
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return 0;
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if (!(x & 0xffff0000u)) {
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x <<= 16;
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r -= 16;
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}
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if (!(x & 0xff000000u)) {
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x <<= 8;
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r -= 8;
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}
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if (!(x & 0xf0000000u)) {
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x <<= 4;
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r -= 4;
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}
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if (!(x & 0xc0000000u)) {
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x <<= 2;
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r -= 2;
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}
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if (!(x & 0x80000000u)) {
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x <<= 1;
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r -= 1;
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}
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return r;
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}
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#define do_div(n,base) ({ \
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int __res; \
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__res = ((unsigned long) n) % (unsigned) base; \
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n = ((unsigned long) n) / (unsigned) base; \
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__res; })
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#if INT_MAX != 0x7fffffff
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#error : sizeof(int) must be 4 for this program
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#endif
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#if (~0ULL) != 0xffffffffffffffffULL
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#error : sizeof(long long) must be 8 for this program
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#endif
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#endif
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