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24 lines
598 B
C
24 lines
598 B
C
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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sign.h
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Abstract:
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Sign
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Author:
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Nikolaj Bjorner
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--*/
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#pragma once
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typedef enum { sign_neg = -1, sign_zero = 0, sign_pos = 1} sign;
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static inline sign operator-(sign s) { switch (s) { case sign_neg: return sign_pos; case sign_pos: return sign_neg; default: return sign_zero; } };
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static inline sign to_sign(int s) { return s == 0 ? sign_zero : (s > 0 ? sign_pos : sign_neg); }
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static inline sign operator*(sign a, sign b) { return to_sign((int)a * (int)b); }
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static inline bool is_zero(sign s) { return s == sign_zero; }
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