зеркало из https://github.com/mozilla/gecko-dev.git
Bug 1065055: also define IS_{LITTLE,BIG}_ENDIAN according to BYTE_ORDER, r=njn
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a93950cbe3
Коммит
6b00feef66
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@ -39,16 +39,36 @@
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#elif defined(JS_HAVE_ENDIAN_H)
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# include <endian.h>
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# if defined(__BYTE_ORDER)
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# if __BYTE_ORDER == __LITTLE_ENDIAN
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# define IS_LITTLE_ENDIAN 1
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# undef IS_BIG_ENDIAN
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# elif __BYTE_ORDER == __BIG_ENDIAN
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# undef IS_LITTLE_ENDIAN
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# define IS_BIG_ENDIAN 1
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/*
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* Historically, OSes providing <endian.h> only defined
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* __BYTE_ORDER to either __LITTLE_ENDIAN or __BIG_ENDIAN.
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* The Austin group decided to standardise <endian.h> in
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* POSIX around 2011, expecting it to provide a BYTE_ORDER
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* #define set to either LITTLE_ENDIAN or BIG_ENDIAN. We
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* should try to cope with both possibilities here.
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*/
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# if defined(__BYTE_ORDER) || defined(BYTE_ORDER)
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# if defined(__BYTE_ORDER)
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# if __BYTE_ORDER == __LITTLE_ENDIAN
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# define IS_LITTLE_ENDIAN 1
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# undef IS_BIG_ENDIAN
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# elif __BYTE_ORDER == __BIG_ENDIAN
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# undef IS_LITTLE_ENDIAN
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# define IS_BIG_ENDIAN 1
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# endif
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# endif
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# if defined(BYTE_ORDER)
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# if BYTE_ORDER == LITTLE_ENDIAN
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# define IS_LITTLE_ENDIAN 1
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# undef IS_BIG_ENDIAN
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# elif BYTE_ORDER == BIG_ENDIAN
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# undef IS_LITTLE_ENDIAN
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# define IS_BIG_ENDIAN 1
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# endif
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# endif
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# else /* !defined(__BYTE_ORDER) */
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# error "endian.h does not define __BYTE_ORDER. Cannot determine endianness."
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# error "endian.h does not define __BYTE_ORDER nor BYTE_ORDER. Cannot determine endianness."
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# endif
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/* BSDs */
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