133 lines
4.0 KiB
C
133 lines
4.0 KiB
C
/*
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* Copyright 2007, Haiku, Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _BYTEORDER_H
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#define _BYTEORDER_H
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#include <BeBuild.h>
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#include <endian.h>
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#include <SupportDefs.h>
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#include <TypeConstants.h>
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/* for convenience */
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/* swap directions */
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typedef enum {
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B_SWAP_HOST_TO_LENDIAN,
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B_SWAP_HOST_TO_BENDIAN,
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B_SWAP_LENDIAN_TO_HOST,
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B_SWAP_BENDIAN_TO_HOST,
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B_SWAP_ALWAYS
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} swap_action;
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/* BSD/networking macros */
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#ifndef htonl
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# define htonl(x) B_HOST_TO_BENDIAN_INT32(x)
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# define ntohl(x) B_BENDIAN_TO_HOST_INT32(x)
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# define htons(x) B_HOST_TO_BENDIAN_INT16(x)
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# define ntohs(x) B_BENDIAN_TO_HOST_INT16(x)
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#endif
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/* always swap macros */
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#define B_SWAP_DOUBLE(arg) __swap_double(arg)
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#define B_SWAP_FLOAT(arg) __swap_float(arg)
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#define B_SWAP_INT64(arg) __swap_int64(arg)
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#define B_SWAP_INT32(arg) __swap_int32(arg)
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#define B_SWAP_INT16(arg) __swap_int16(arg)
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#if BYTE_ORDER == __LITTLE_ENDIAN
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/* Host is little endian */
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#define B_HOST_IS_LENDIAN 1
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#define B_HOST_IS_BENDIAN 0
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/* Host native to little endian */
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#define B_HOST_TO_LENDIAN_DOUBLE(arg) (double)(arg)
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#define B_HOST_TO_LENDIAN_FLOAT(arg) (float)(arg)
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#define B_HOST_TO_LENDIAN_INT64(arg) (uint64)(arg)
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#define B_HOST_TO_LENDIAN_INT32(arg) (uint32)(arg)
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#define B_HOST_TO_LENDIAN_INT16(arg) (uint16)(arg)
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/* Little endian to host native */
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#define B_LENDIAN_TO_HOST_DOUBLE(arg) (double)(arg)
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#define B_LENDIAN_TO_HOST_FLOAT(arg) (float)(arg)
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#define B_LENDIAN_TO_HOST_INT64(arg) (uint64)(arg)
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#define B_LENDIAN_TO_HOST_INT32(arg) (uint32)(arg)
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#define B_LENDIAN_TO_HOST_INT16(arg) (uint16)(arg)
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/* Host native to big endian */
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#define B_HOST_TO_BENDIAN_DOUBLE(arg) __swap_double(arg)
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#define B_HOST_TO_BENDIAN_FLOAT(arg) __swap_float(arg)
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#define B_HOST_TO_BENDIAN_INT64(arg) __swap_int64(arg)
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#define B_HOST_TO_BENDIAN_INT32(arg) __swap_int32(arg)
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#define B_HOST_TO_BENDIAN_INT16(arg) __swap_int16(arg)
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/* Big endian to host native */
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#define B_BENDIAN_TO_HOST_DOUBLE(arg) __swap_double(arg)
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#define B_BENDIAN_TO_HOST_FLOAT(arg) __swap_float(arg)
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#define B_BENDIAN_TO_HOST_INT64(arg) __swap_int64(arg)
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#define B_BENDIAN_TO_HOST_INT32(arg) __swap_int32(arg)
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#define B_BENDIAN_TO_HOST_INT16(arg) __swap_int16(arg)
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#else /* BYTE_ORDER */
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/* Host is big endian */
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#define B_HOST_IS_LENDIAN 0
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#define B_HOST_IS_BENDIAN 1
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/* Host native to little endian */
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#define B_HOST_TO_LENDIAN_DOUBLE(arg) __swap_double(arg)
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#define B_HOST_TO_LENDIAN_FLOAT(arg) __swap_float(arg)
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#define B_HOST_TO_LENDIAN_INT64(arg) __swap_int64(arg)
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#define B_HOST_TO_LENDIAN_INT32(arg) __swap_int32(arg)
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#define B_HOST_TO_LENDIAN_INT16(arg) __swap_int16(arg)
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/* Little endian to host native */
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#define B_LENDIAN_TO_HOST_DOUBLE(arg) __swap_double(arg)
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#define B_LENDIAN_TO_HOST_FLOAT(arg) __swap_float(arg)
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#define B_LENDIAN_TO_HOST_INT64(arg) __swap_int64(arg)
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#define B_LENDIAN_TO_HOST_INT32(arg) __swap_int32(arg)
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#define B_LENDIAN_TO_HOST_INT16(arg) __swap_int16(arg)
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/* Host native to big endian */
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#define B_HOST_TO_BENDIAN_DOUBLE(arg) (double)(arg)
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#define B_HOST_TO_BENDIAN_FLOAT(arg) (float)(arg)
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#define B_HOST_TO_BENDIAN_INT64(arg) (uint64)(arg)
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#define B_HOST_TO_BENDIAN_INT32(arg) (uint32)(arg)
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#define B_HOST_TO_BENDIAN_INT16(arg) (uint16)(arg)
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/* Big endian to host native */
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#define B_BENDIAN_TO_HOST_DOUBLE(arg) (double)(arg)
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#define B_BENDIAN_TO_HOST_FLOAT(arg) (float)(arg)
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#define B_BENDIAN_TO_HOST_INT64(arg) (uint64)(arg)
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#define B_BENDIAN_TO_HOST_INT32(arg) (uint32)(arg)
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#define B_BENDIAN_TO_HOST_INT16(arg) (uint16)(arg)
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#endif /* BYTE_ORDER */
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern status_t swap_data(type_code type, void *data, size_t length,
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swap_action action);
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extern bool is_type_swapped(type_code type);
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/* Private implementations */
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extern double __swap_double(double arg);
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extern float __swap_float(float arg);
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extern uint64 __swap_int64(uint64 arg);
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extern uint32 __swap_int32(uint32 arg);
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extern uint16 __swap_int16(uint16 arg);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _BYTEORDER_H */
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