43 lines
854 B
C
Executable File
43 lines
854 B
C
Executable File
#ifndef BIT_H
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#define BIT_H
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/*
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Most of these functions are courtesy of
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Hacker's Delight, 2nd edition (Henry S. Warren, Jr.)
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*/
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#include <stdio.h>
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#include "types/types.h"
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// rounds down (floors) to the nearest power of 2
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u64 flp2(u64 x);
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// rounds down (floors) to the nearest power of 2 in 32 bits
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u32 flp2_32(u32 x);
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// rounds up (ceils) to the nearest power of 2
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u64 clp2(u64 x);
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// rounds up (ceils) to the nearest power of 2 in 32 bits
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u32 clp2_32(u32 x);
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// prints the bits of the data pointed to by ptr of size size to fp
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void _bitstofile(void const * const ptr, size_t const size, FILE *fp);
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#define fprintb(n, f) ({ \
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typeof(n) _n = (n); \
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_bitstofile(&(_n), sizeof(_n), f); \
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})
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#define printb(n) fprintb(n, stdout)
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#define fputb(n, f) ({ \
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fprintb(n, f); \
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fputc('\n', f); \
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})
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#define putb(n) fputb(n, stdout)
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#endif
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