util/types.c

   1 /* types.c -- find out size of data types */
   2
   3 /*
   4
   5 output on Mac OS X PPC
   6
   7 type      bytes
   8 ---------------
   9 char      1
  10 char *    4
  11 void *    4
  12 short int 2
  13 int       4
  14 long      4
  15 long int  4
  16 long long 8
  17 float     4
  18 double    8
  19 wchar_t   4
  20
  21 output on AMD64
  22
  23 type      bytes
  24 ---------------
  25 char        1
  26 char *      8
  27 void *      8
  28 short int   2
  29 int         4
  30 long        8
  31 long int    8
  32 long long   8
  33 float       4
  34 double      8
  35 long double 16
  36 wchar_t     4
  37
  38 */
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <wchar.h>
  43
  44 int main(int argc, char * argv[])
  45 {
  46 printf("\n");
  47 printf("type      bytes\n");
  48 printf("---------------\n");
  49 printf("char        %d\n", sizeof(char));
  50 printf("char *      %d\n", sizeof(char *));
  51 printf("void *      %d\n", sizeof(void *));
  52 printf("short int   %d\n", sizeof(short int));
  53 printf("int         %d\n", sizeof(int));
  54 printf("long        %d\n", sizeof(long));
  55 printf("long int    %d\n", sizeof(long int));
  56 printf("long long   %d\n", sizeof(long long));
  57 printf("size_t      %d\n", sizeof(size_t));
  58 printf("float       %d\n", sizeof(float));
  59 printf("double      %d\n", sizeof(double));
  60 printf("long double %d\n", sizeof(long double));
  61 printf("wchar_t     %d\n", sizeof(wchar_t));
  62
  63 printf("\n");
  64 printf("format input              output\n");
  65 printf("------------------------------------------------\n");
  66 printf("%%d     0xffffffff           %d\n", 0xffffffff);
  67 printf("%%u     0xffffffff           %u\n", 0xffffffff);
  68 printf("%%d     0x7fffffff           %d\n", 0x7fffffff);
  69 printf("%%u     0x7fffffff           %u\n", 0x7fffffff);
  70 printf("%%d     0x80000000           %d\n", 0x80000000);
  71 printf("%%u     0x80000000           %u\n", 0x80000000);
  72 printf("%%d     0x7fffffffffffffffLL %d\n", 0x7fffffffffffffffLL);
  73 printf("%%u     0x7fffffffffffffffLL %u\n", 0x7fffffffffffffffLL);
  74 printf("%%x     0xffffffffffffffffLL %x\n", 0xffffffffffffffffLL);
  75 printf("%%X     0x7fffffffffffffffLL %x\n", 0x7fffffffffffffffLL);
  76 printf("%%X     0x8000000000000000LL %x\n", 0x8000000000000000LL);
  77 printf("%%llX   0xFFFFFFFFFFFFFFFFLL %x\n", 0xFFFFFFFFFFFFFFFFLL);
  78 printf("%%llX   0x7FFFFFFFFFFFFFFFLL %x\n", 0x7FFFFFFFFFFFFFFFLL);
  79 printf("%%llX   0x8000000000000000LL %x\n", 0x8000000000000000LL);
  80 #ifndef TRU64
  81 printf("%%lld   0xffffffffffffffffLL %lld\n", 0xFFFFFFFFFFFFFFFFLL);
  82 printf("%%llu   0xffffffffffffffffLL %llu\n", 0xFFFFFFFFFFFFFFFFLL);
  83 printf("%%lld   0x7fffffffffffffffLL %lld\n", 0x7fffffffffffffffLL);
  84 printf("%%llu   0x7fffffffffffffffLL %lld\n", 0x7fffffffffffffffLL);
  85 printf("%%lld   0x8000000000000000LL %lld\n", 0x8000000000000000LL);
  86 printf("%%llu   0x8000000000000000LL %llu\n", 0x8000000000000000LL);
  87 #else
  88 printf("%%ld   0xffffffffffffffffLL %ld\n", 0xFFFFFFFFFFFFFFFFLL);
  89 printf("%%lu   0xffffffffffffffffLL %ld\n", 0xFFFFFFFFFFFFFFFFLL);
  90 printf("%%ld   0x7fffffffffffffffLL %ld\n", 0x7FFFFFFFFFFFFFFFLL);
  91 printf("%%lu   0x7fffffffffffffffLL %lu\n", 0x7FFFFFFFFFFFFFFFLL);
  92 printf("%%ld   0x8000000000000000LL %ld\n", 0x8000000000000000LL);
  93 printf("%%lu   0x8000000000000000LL %lu\n", 0x8000000000000000LL);
  94 #endif
  95
  96 exit(0);
  97 }
  98
  99