82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/*
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* integers.h:
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* This header file ensures that we have u_int<n>_t types of the proper width,
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* using a rather convoluted set of conditionals generated by configure. This
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* is an almighty pain in the arse, and is completely irrelevant on most
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* systems which already define this stuff.
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*
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* $Id$
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*
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*/
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#ifndef __INTEGERS_H_ /* include guard */
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#define __INTEGERS_H_
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#include <sys/types.h>
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#include "config.h"
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#if SIZEOF_U_INT8_T != 1 || SIZEOF_U_INT16_T != 2 || SIZEOF_U_INT32_T != 4
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# if defined(HAVE_C99_INTS)
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/*
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* Use the C99 standard-width integers, defined in some appropriate
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* header file.
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*/
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# if defined(HAVE_STDINT_H)
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# include <stdint.h>
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# elif defined(HAVE_SYS_INTTYPES_H)
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# include <sys/inttypes.h>
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# endif
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/* Don't replace existing u_int<n>_t types. */
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# if SIZEOF_U_INT8_T != 1
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typedef uint8_t u_int8_t;
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# endif
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# if SIZEOF_U_INT16_T != 2
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typedef uint16_t u_int16_t;
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# endif
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# if SIZEOF_U_INT32_T != 4
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typedef uint32_t u_int32_t;
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# endif
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# elif (SIZEOF_UNSIGNED_SHORT_INT == 2 || SIZEOF_UNSIGNED_INT == 2) \
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&& (SIZEOF_UNSIGNED_INT == 4 || SIZEOF_UNSIGNED_LONG_INT == 4)
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/*
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* Use an appropriately-sized basic type.
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*/
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# if SIZEOF_U_INT8_T != 1
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typedef unsigned char u_int8_t; /* By definition. */
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# endif
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# if SIZEOF_U_INT16_T != 2
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# if SIZEOF_UNSIGNED_SHORT_INT == 2
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typedef unsigned short int u_int16_t;
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# elif SIZEOF_UNSIGNED_INT == 2
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typedef unsigned int u_int16_t; /* Not likely. */
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# endif
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# endif
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# if SIZEOF_U_INT32_T != 4
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# if SIZEOF_UNSIGNED_INT == 4
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typedef unsigned int u_int32_t;
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# elif SIZEOF_UNSIGNED_LONG_INT == 4
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typedef unsigned long int u_int32_t;
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# endif
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# endif
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/* Whew. */
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# else
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# error "Your C compiler seems to lack 16 and 32 bit unsigned integer types"
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# endif
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#endif /* No existing u_int<n>_t types. */
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#endif /* __INTEGERS_H_ */
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