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37 lines
710 B
C
37 lines
710 B
C
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#ifndef _TURBOPFOR_COMMON_H
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#define _TURBOPFOR_COMMON_H 1
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// Common definitions and utilities between turbopfor.h (decode)
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// and turbopfor-encode.h (encode).
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#include <limits.h>
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enum BlockType {
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FOR = 0,
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PFOR_VB = 1,
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PFOR_BITMAP = 2,
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CONSTANT = 3
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};
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// Does not properly account for overflow.
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inline unsigned div_round_up(unsigned val, unsigned div)
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{
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return (val + div - 1) / div;
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}
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inline unsigned bytes_for_packed_bits(unsigned num, unsigned bit_width)
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{
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return div_round_up(num * bit_width, CHAR_BIT);
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}
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constexpr uint32_t mask_for_bits(unsigned bit_width)
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{
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if (bit_width == 32) {
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return 0xFFFFFFFF;
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} else {
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return (1U << bit_width) - 1;
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}
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}
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#endif // !defined(_TURBOPFOR_COMMON_H)
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