1 files changed, 107 insertions, 0 deletions
diff --git a/mkfs.ubifs/defs.h b/mkfs.ubifs/defs.h
new file mode 100644
index 0000000..06cf9e5
--- /dev/null
+++ b/mkfs.ubifs/defs.h
@@ -0,0 +1,107 @@
+/*
+ * Greate deal of the code was taken from the kernel UBIFS implementation, and
+ * this file contains some "glue" definitions.
+ */
+
+#ifndef __UBIFS_DEFS_H__
+#define __UBIFS_DEFS_H__
+
+#define t16(x) ({ \
+	uint16_t __b = (x); \
+	(__LITTLE_ENDIAN==__BYTE_ORDER) ? __b : bswap_16(__b); \
+})
+
+#define t32(x) ({ \
+	uint32_t __b = (x); \
+	(__LITTLE_ENDIAN==__BYTE_ORDER) ? __b : bswap_32(__b); \
+})
+
+#define t64(x) ({ \
+	uint64_t __b = (x); \
+	(__LITTLE_ENDIAN==__BYTE_ORDER) ? __b : bswap_64(__b); \
+})
+
+#define cpu_to_le16(x) ((__le16){t16(x)})
+#define cpu_to_le32(x) ((__le32){t32(x)})
+#define cpu_to_le64(x) ((__le64){t64(x)})
+
+#define le16_to_cpu(x) (t16((x)))
+#define le32_to_cpu(x) (t32((x)))
+#define le64_to_cpu(x) (t64((x)))
+
+#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
+#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
+
+#define min_t(t,x,y) ({ \
+	typeof((x)) _x = (x); \
+	typeof((y)) _y = (y); \
+	(_x < _y) ? _x : _y; \
+})
+
+#define max_t(t,x,y) ({ \
+	typeof((x)) _x = (x); \
+	typeof((y)) _y = (y); \
+	(_x > _y) ? _x : _y; \
+})
+
+#define unlikely(x) (x)
+
+#define ubifs_assert(x) ({})
+
+struct qstr
+{
+	char *name;
+	size_t len;
+};
+
+/**
+ * fls - find last (most-significant) bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs.
+ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+ */
+static inline int fls(int x)
+{
+	int r = 32;
+
+	if (!x)
+		return 0;
+	if (!(x & 0xffff0000u)) {
+		x <<= 16;
+		r -= 16;
+	}
+	if (!(x & 0xff000000u)) {
+		x <<= 8;
+		r -= 8;
+	}
+	if (!(x & 0xf0000000u)) {
+		x <<= 4;
+		r -= 4;
+	}
+	if (!(x & 0xc0000000u)) {
+		x <<= 2;
+		r -= 2;
+	}
+	if (!(x & 0x80000000u)) {
+		x <<= 1;
+		r -= 1;
+	}
+	return r;
+}
+
+#define do_div(n,base) ({ \
+int __res; \
+__res = ((unsigned long) n) % (unsigned) base; \
+n = ((unsigned long) n) / (unsigned) base; \
+__res; })
+
+#if INT_MAX != 0x7fffffff
+#error : sizeof(int) must be 4 for this program
+#endif
+
+#if (~0ULL) != 0xffffffffffffffffULL
+#error : sizeof(long long) must be 8 for this program
+#endif
+
+#endif