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| -rw-r--r-- | usr/sdk/inc/sdk/param.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/usr/sdk/inc/sdk/param.h b/usr/sdk/inc/sdk/param.h new file mode 100644 index 0000000..8c9633c --- /dev/null +++ b/usr/sdk/inc/sdk/param.h @@ -0,0 +1,31 @@ +/* + * Copyright (c) 2025, Ian Moffett. + * Provided under the BSD-3 clause. + */ + +#ifndef _SDK_PARAM_H_ +#define _SDK_PARAM_H_ 1 + +#include <sdk/types.h> + +/* Offset a pointer +/- 'n' */ +#define PTR_OFFSET(P, OFF) (void *)((UQUAD)(P) + (OFF)) +#define PTR_NOFFSET(P, OFF) (void *)((UQUAD)(P) - (OFF)) + +/* Bit related macros */ +#define ISSET(v, f) ((v) & (f)) +#define BIT(n) (1ULL << (n)) +#define MASK(n) ((1ULL << n) - 1) + +/* Align up/down a value */ +#define ALIGN_DOWN(value, align) ((value) & ~((align)-1)) +#define ALIGN_UP(value, align) (((value) + (align)-1) & ~((align)-1)) + +/* Bitmap helper macros */ +#define SETBIT(a, b) ((a)[(b) >> 3] |= BIT(b % 8)) +#define CLRBIT(a, b) ((a)[(b) >> 3] &= ~BIT(b % 8)) +#define TESTBIT(a, b) (ISSET((a)[(b) >> 3], BIT(b % 8))) + +#define NELEM(a) (sizeof(a) / sizeof(a[0])) + +#endif /* !_SDK_PARAM_H_ */ |