fef
460ff1a37b
Internal headers, i.e. those prefixed with an underscore, aren't supposed to be included in external projects anyways and libneo itself is obviously C only.
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/** See the end of this file for copyright and license terms. */
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#pragma once
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#include "neo/_types.h"
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#ifdef __cplusplus
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# define nil nullptr
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#else
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# define nil ((void *)0)
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#endif
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#if !defined(__cplusplus) && !defined(true)
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# define true ((bool)1)
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#endif
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#if !defined(__cplusplus) && !defined(false)
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# define false ((bool)0)
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#endif
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#ifndef offsetof
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# define offsetof(type, member) __builtin_offsetof(type, member)
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#endif
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#ifndef typeof
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# define typeof(expr) __typeof(expr)
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#endif
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/** Get the absolute (non negative) value of an integer */
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#define nabs(n) ({ \
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/* n is an expression, not a variable, evaluate it only once */ \
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typeof(n) __neo_local_n = (n); \
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__neo_local_n < 0 ? -__neo_local_n : __neo_local_n; \
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})
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/**
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* Declare a length field in a structure.
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* This makes it compatible with the `nlen` macro.
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*
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* @param name: field name, will be of type `usize`
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*/
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#define NLEN_FIELD(name) \
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union { \
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usize name; \
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const usize __neo_nlen; \
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}
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/**
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* Quickly get the length (as a `const usize`) of any libneo data structure
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* that supports it. This includes strings, buffers, lists, and more.
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*/
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#define nlen(thing) ((thing)->__neo_nlen)
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/*
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* This file is part of libneo.
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* Copyright (c) 2021 Fefie <owo@fef.moe>.
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*
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* libneo is non-violent software: you may only use, redistribute,
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* and/or modify it under the terms of the CNPLv6+ as found in
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* the LICENSE file in the source code root directory or at
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* <https://git.pixie.town/thufie/CNPL>.
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*
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* libneo comes with ABSOLUTELY NO WARRANTY, to the extent
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* permitted by applicable law. See the CNPLv6+ for details.
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*/
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