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Annotation of embedaddon/iftop/integers.h, revision 1.1.1.1

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_ */