mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
Yukihiro "Matz" Matsumoto
45 lines
913 B
C
45 lines
913 B
C
/**
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** @file mruby/endian.h - detect endian-ness
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**
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** See Copyright Notice in mruby.h
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*/
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#ifndef MRUBY_ENDIAN_H
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#define MRUBY_ENDIAN_H
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#include <limits.h>
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MRB_BEGIN_DECL
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#if !defined(BYTE_ORDER) && defined(__BYTE_ORDER__)
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# define BYTE_ORDER __BYTE_ORDER__
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#endif
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#if !defined(BIG_ENDIAN) && defined(__ORDER_BIG_ENDIAN__)
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# define BIG_ENDIAN __ORDER_BIG_ENDIAN__
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#endif
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#if !defined(LITTLE_ENDIAN) && defined(__ORDER_LITTLE_ENDIAN__)
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# define LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
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#endif
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#ifdef BYTE_ORDER
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# if BYTE_ORDER == BIG_ENDIAN
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# define littleendian 0
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# elif BYTE_ORDER == LITTLE_ENDIAN
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# define littleendian 1
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# endif
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#endif
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#ifndef littleendian
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/* can't distinguish endian in compile time */
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static inline int
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check_little_endian(void)
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{
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unsigned int n = 1;
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return (*(unsigned char*)&n == 1);
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}
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# define littleendian check_little_endian()
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#endif
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MRB_END_DECL
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#endif /* MRUBY_ENDIAN_H */
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