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Annotation of embedaddon/iftop/integers.h, revision 1.1

1.1     ! misho       1: /*
        !             2:  * integers.h:
        !             3:  * This header file ensures that we have u_int<n>_t types of the proper width,
        !             4:  * using a rather convoluted set of conditionals generated by configure. This
        !             5:  * is an almighty pain in the arse, and is completely irrelevant on most
        !             6:  * systems which already define this stuff.
        !             7:  *
        !             8:  * $Id: integers.h,v 1.1 2002/11/04 12:28:43 chris Exp $
        !             9:  *
        !            10:  */
        !            11: 
        !            12: #ifndef __INTEGERS_H_ /* include guard */
        !            13: #define __INTEGERS_H_
        !            14: 
        !            15: #include <sys/types.h>
        !            16: #include "config.h"
        !            17: 
        !            18: #if SIZEOF_U_INT8_T != 1 || SIZEOF_U_INT16_T != 2 || SIZEOF_U_INT32_T != 4
        !            19: 
        !            20: #   if defined(HAVE_C99_INTS)
        !            21:         
        !            22:         /* 
        !            23:          * Use the C99 standard-width integers, defined in some appropriate
        !            24:          * header file.
        !            25:          */
        !            26: 
        !            27: #       if defined(HAVE_STDINT_H)
        !            28: #           include <stdint.h>
        !            29: #       elif defined(HAVE_SYS_INTTYPES_H)
        !            30: #           include <sys/inttypes.h>
        !            31: #       endif
        !            32: 
        !            33:         /* Don't replace existing u_int<n>_t types. */
        !            34: #       if SIZEOF_U_INT8_T != 1
        !            35:             typedef uint8_t u_int8_t;
        !            36: #       endif
        !            37: 
        !            38: #       if SIZEOF_U_INT16_T != 2
        !            39:             typedef uint16_t u_int16_t;
        !            40: #       endif
        !            41: 
        !            42: #       if SIZEOF_U_INT32_T != 4
        !            43:             typedef uint32_t u_int32_t;
        !            44: #       endif
        !            45: 
        !            46: #   elif (SIZEOF_UNSIGNED_SHORT_INT == 2 || SIZEOF_UNSIGNED_INT == 2)    \
        !            47:           && (SIZEOF_UNSIGNED_INT == 4 || SIZEOF_UNSIGNED_LONG_INT == 4)
        !            48:     
        !            49:         /*
        !            50:          * Use an appropriately-sized basic type.
        !            51:          */
        !            52:     
        !            53: #       if SIZEOF_U_INT8_T != 1
        !            54:             typedef unsigned char u_int8_t;         /* By definition. */
        !            55: #       endif
        !            56: 
        !            57: #       if SIZEOF_U_INT16_T != 2
        !            58: #           if SIZEOF_UNSIGNED_SHORT_INT == 2
        !            59:                 typedef unsigned short int u_int16_t;
        !            60: #           elif SIZEOF_UNSIGNED_INT == 2
        !            61:                 typedef unsigned int u_int16_t;     /* Not likely. */
        !            62: #           endif
        !            63: #       endif
        !            64: 
        !            65: #       if SIZEOF_U_INT32_T != 4
        !            66: #           if SIZEOF_UNSIGNED_INT == 4
        !            67:                 typedef unsigned int u_int32_t;
        !            68: #           elif SIZEOF_UNSIGNED_LONG_INT == 4
        !            69:                 typedef unsigned long int u_int32_t;
        !            70: #           endif
        !            71: #       endif
        !            72: 
        !            73:         /* Whew. */
        !            74: 
        !            75: #   else
        !            76: #       error "Your C compiler seems to lack 16 and 32 bit unsigned integer types"
        !            77: #   endif
        !            78: 
        !            79: #endif /* No existing u_int<n>_t types. */
        !            80: 
        !            81: #endif /* __INTEGERS_H_ */