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Text File  |  1994-12-16  |  35.4 KB  |  559 lines
  1. # Bestimmung einiger Maschinen-Parameter und -AbhΣngigkeiten
  2. # und Ausgabe in ein Include-File
  3. # Bruno Haible 10.9.1991, 12.10.1992, 6.12.1992, 24.10.1993
  4.  
  5. #define _POSIX_SOURCE
  6. #include <stdio.h>
  7.  
  8. #define loop  while(1)
  9.  
  10. typedef int boolean;
  11. #define TRUE  1
  12. #define FALSE 0
  13.  
  14. #ifdef __CHAR_UNSIGNED__
  15. typedef signed char  schar;
  16. #else
  17. typedef char  schar;
  18. #endif
  19. typedef unsigned char  uchar;
  20. typedef unsigned short  ushort;
  21. typedef unsigned /* int */  uint;
  22. typedef unsigned long  ulong;
  23. #ifdef HAVE_LONGLONG
  24. typedef long long  longlong;
  25. typedef unsigned long long  ulonglong;
  26. #endif
  27. typedef int (function)();
  28.  
  29. static int random_table[256] = # 2048 zufΣllige Bits, hier von pi
  30.   { 0xC9,0x0F,0xDA,0xA2,0x21,0x68,0xC2,0x34,0xC4,0xC6,0x62,0x8B,
  31.     0x80,0xDC,0x1C,0xD1,0x29,0x02,0x4E,0x08,0x8A,0x67,0xCC,0x74,
  32.     0x02,0x0B,0xBE,0xA6,0x3B,0x13,0x9B,0x22,0x51,0x4A,0x08,0x79,
  33.     0x8E,0x34,0x04,0xDD,0xEF,0x95,0x19,0xB3,0xCD,0x3A,0x43,0x1B,
  34.     0x30,0x2B,0x0A,0x6D,0xF2,0x5F,0x14,0x37,0x4F,0xE1,0x35,0x6D,
  35.     0x6D,0x51,0xC2,0x45,0xE4,0x85,0xB5,0x76,0x62,0x5E,0x7E,0xC6,
  36.     0xF4,0x4C,0x42,0xE9,0xA6,0x37,0xED,0x6B,0x0B,0xFF,0x5C,0xB6,
  37.     0xF4,0x06,0xB7,0xED,0xEE,0x38,0x6B,0xFB,0x5A,0x89,0x9F,0xA5,
  38.     0xAE,0x9F,0x24,0x11,0x7C,0x4B,0x1F,0xE6,0x49,0x28,0x66,0x51,
  39.     0xEC,0xE4,0x5B,0x3D,0xC2,0x00,0x7C,0xB8,0xA1,0x63,0xBF,0x05,
  40.     0x98,0xDA,0x48,0x36,0x1C,0x55,0xD3,0x9A,0x69,0x16,0x3F,0xA8,
  41.     0xFD,0x24,0xCF,0x5F,0x83,0x65,0x5D,0x23,0xDC,0xA3,0xAD,0x96,
  42.     0x1C,0x62,0xF3,0x56,0x20,0x85,0x52,0xBB,0x9E,0xD5,0x29,0x07,
  43.     0x70,0x96,0x96,0x6D,0x67,0x0C,0x35,0x4E,0x4A,0xBC,0x98,0x04,
  44.     0xF1,0x74,0x6C,0x08,0xCA,0x18,0x21,0x7C,0x32,0x90,0x5E,0x46,
  45.     0x2E,0x36,0xCE,0x3B,0xE3,0x9E,0x77,0x2C,0x18,0x0E,0x86,0x03,
  46.     0x9B,0x27,0x83,0xA2,0xEC,0x07,0xA2,0x8F,0xB5,0xC5,0x5D,0xF0,
  47.     0x6F,0x4C,0x52,0xC9,0xDE,0x2B,0xCB,0xF6,0x95,0x58,0x17,0x18,
  48.     0x39,0x95,0x49,0x7C,0xEA,0x95,0x6A,0xE5,0x15,0xD2,0x26,0x18,
  49.     0x98,0xFA,0x05,0x10,0x15,0x72,0x8E,0x5A,0x8A,0xAA,0xC4,0x2D,
  50.     0xAD,0x33,0x17,0x0D,0x04,0x50,0x7A,0x33,0xA8,0x55,0x21,0xAB,
  51.     0xDF,0x1C,0xBA,0x65,
  52.   };
  53. #define random_table_length  (8*256)
  54. static int random_position = -1;
  55. int next_random_bit()
  56.   { random_position++;
  57.     if (random_position==random_table_length) random_position = 0;
  58.     return (random_table[random_position/8] >> (random_position % 8)) & 1;
  59.   }
  60.  
  61. #ifdef __STDC__
  62. printf_underscored (char* string)
  63. #else
  64. printf_underscored(string)
  65.   char* string;
  66. #endif
  67.   { char c;
  68.     while (!((c = *string++) == '\0')) { printf("%c",(c==' ' ? '_' : c)); }
  69.   }
  70.  
  71. # string_length(string) is the same as strlen(string).
  72. # Better avoid to depend on <string.h>.
  73. #ifdef __STDC__
  74. int string_length (char* string)
  75. #else
  76. int string_length(string)
  77.   char* string;
  78. #endif
  79.   { int count = 0;
  80.     while (!(*string++ == '\0')) { count++; }
  81.     return count;
  82.   }
  83.  
  84. static int char_bitsize, short_bitsize, int_bitsize, long_bitsize;
  85. static int uchar_bitsize, ushort_bitsize, uint_bitsize, ulong_bitsize;
  86. static boolean char_uchar_same, short_ushort_same, int_uint_same, long_ulong_same;
  87. static int pointer_bitsize;
  88. #ifdef HAVE_LONGLONG
  89. static int longlong_bitsize, ulonglong_bitsize;
  90. static boolean longlong_ulonglong_same;
  91. #endif
  92.  
  93. main1() {
  94. #define get_integer_bitsize(type,where)  \
  95.   { type x = 1;                                 \
  96.     int bits = 0;                               \
  97.     loop                                        \
  98.       { if (x==0) break;                        \
  99.         x = x+x;                                \
  100.         bits++;                                 \
  101.         if (bits==1000) { bits = -1; break; }   \
  102.       }                                         \
  103.     where = bits;                               \
  104.   }
  105. #define print_integer_bitsize(type,typestr,where)  \
  106.   { if (where >= 0)                                                  \
  107.       { printf("/* Integers of t%spe %s have %ld bits. */\n","y",typestr,(long)where); \
  108.         if (!(typestr[0] == 'u'))                                    \
  109.           { printf("#define "); printf_underscored(typestr); printf("_bitsize %ld\n",(long)where); } \
  110.         printf("\n");                                                \
  111.       }                                                              \
  112.       else                                                           \
  113.       { printf("#error \"Integers of t%spe %s have no binary representation!!\"\n","y",typestr); } \
  114.     if (!(where == char_bitsize * sizeof(type)))                     \
  115.       { printf("#error \"Formula BITSIZE(T) = SIZEOF(T) * BITSPERBYTE does not hold for t%spe %s!!\"\n","y",typestr); } \
  116.   }
  117.   get_integer_bitsize(schar,char_bitsize);
  118.   get_integer_bitsize(short,short_bitsize);
  119.   get_integer_bitsize(int,int_bitsize);
  120.   get_integer_bitsize(long,long_bitsize);
  121.   print_integer_bitsize(schar,"char",char_bitsize);
  122.   print_integer_bitsize(short,"short",short_bitsize);
  123.   print_integer_bitsize(int,"int",int_bitsize);
  124.   print_integer_bitsize(long,"long",long_bitsize);
  125. #ifdef HAVE_LONGLONG
  126.   get_integer_bitsize(longlong,longlong_bitsize);
  127.   print_integer_bitsize(longlong,"long long",longlong_bitsize);
  128. #endif
  129.   get_integer_bitsize(uchar,uchar_bitsize);
  130.   get_integer_bitsize(ushort,ushort_bitsize);
  131.   get_integer_bitsize(uint,uint_bitsize);
  132.   get_integer_bitsize(ulong,ulong_bitsize);
  133.   print_integer_bitsize(uchar,"unsigned char",uchar_bitsize);
  134.   print_integer_bitsize(ushort,"unsigned short",ushort_bitsize);
  135.   print_integer_bitsize(uint,"unsigned int",uint_bitsize);
  136.   print_integer_bitsize(ulong,"unsigned long",ulong_bitsize);
  137. #ifdef HAVE_LONGLONG
  138.   get_integer_bitsize(ulonglong,ulonglong_bitsize);
  139.   print_integer_bitsize(ulonglong,"unsigned long long",ulonglong_bitsize);
  140. #endif
  141. }
  142.  
  143. main2() {
  144. #define compare_integer_bitsizes(typestr1,typestr2,type1_bitsize,type2_bitsize)  \
  145.   { if (!(type1_bitsize==type2_bitsize))                                                       \
  146.       printf("#error \"Integer types %s and %s have different sizes!!\"\n",typestr1,typestr2); \
  147.   }
  148.   compare_integer_bitsizes("char","unsigned char",char_bitsize,uchar_bitsize);
  149.   compare_integer_bitsizes("short","unsigned short",short_bitsize,ushort_bitsize);
  150.   compare_integer_bitsizes("int","unsigned int",int_bitsize,uint_bitsize);
  151.   compare_integer_bitsizes("long","unsigned long",long_bitsize,ulong_bitsize);
  152. #ifdef HAVE_LONGLONG
  153.   compare_integer_bitsizes("long long","unsigned long long",longlong_bitsize,ulonglong_bitsize);
  154. #endif
  155. }
  156.  
  157. #define get_a_random(type,bitsize,where)  \
  158.   { type x = 0;                                          \
  159.     int i = bitsize;                                     \
  160.     while (i>0) { x = (x<<1) + next_random_bit(); i--; } \
  161.     where = x;                                           \
  162.   }
  163. #define get_a_random_twice(type1,type2,bitsize,where1,where2)  \
  164.   { type1 x1 = 0; type2 x2 = 0;                 \
  165.     int i = bitsize;                            \
  166.     while (i>0)                                 \
  167.       { type1 b = next_random_bit();            \
  168.         x1 = ((x1<<1) + b); x2 = ((x2<<1) + b); \
  169.         i--;                                    \
  170.       }                                         \
  171.     where1 = x1; where2 = x2;                   \
  172.   }
  173.  
  174. main3() {
  175. #define compare_integer_representation(type1,type2,typestr1,typestr2,type1_bitsize,type2_bitsize,where)  \
  176.   { if ((type1_bitsize>=0) && (type2_bitsize>=0) && (type1_bitsize==type2_bitsize))           \
  177.       { int i,j;                                                                              \
  178.         type1 sample1; type2 sample2;                                                         \
  179.         where = TRUE;                                                                         \
  180.         for (i = 0; i<100; i++)                                                               \
  181.           { get_a_random_twice(type1,type2,type1_bitsize,sample1,sample2);                    \
  182.             if (!(sample1 == (type1)(sample2))) { where = FALSE; }                            \
  183.             if (!(sample2 == (type2)(sample1))) { where = FALSE; }                            \
  184.           }                                                                                   \
  185.         for (i = 0; i<100; i++)                                                               \
  186.           { get_a_random(type1,type1_bitsize,sample1);                                        \
  187.             sample2 = (type2)(sample1);                                                       \
  188.             for (j = 0; j < type1_bitsize; j++)                                               \
  189.               if (!( ((sample1 & ((type1)1<<j)) == 0)                                         \
  190.                      == ((sample2 & ((type2)1<<j)) == 0)                                      \
  191.                  ) )                                                                          \
  192.                 { where = FALSE; }                                                            \
  193.           }                                                                                   \
  194.         if (where)                                                                            \
  195.           { printf("/* Integer types %s and %s have the same binary representation. */\n",typestr1,typestr2); } \
  196.           else                                                                                \
  197.           { printf("#error \"Integer types %s and %s have different binary representations!!\"\n",typestr1,typestr2); } \
  198.       }                                                                                       \
  199.       else                                                                                    \
  200.       { where = FALSE; }                                                                      \
  201.   }
  202.   compare_integer_representation(schar,uchar,"char","unsigned char",char_bitsize,uchar_bitsize,char_uchar_same);
  203.   compare_integer_representation(short,ushort,"short","unsigned short",short_bitsize,ushort_bitsize,short_ushort_same);
  204.   compare_integer_representation(int,uint,"int","unsigned int",int_bitsize,uint_bitsize,int_uint_same);
  205.   compare_integer_representation(long,ulong,"long","unsigned long",long_bitsize,ulong_bitsize,long_ulong_same);
  206. #ifdef HAVE_LONGLONG
  207.   compare_integer_representation(longlong,ulonglong,"long long","unsigned long long",longlong_bitsize,ulonglong_bitsize,longlong_ulonglong_same);
  208. #endif
  209.   printf("\n");
  210. }
  211.  
  212. main4() {
  213. #define test_integer_ushift(type,typestr,type_bitsize)  \
  214.   if (type_bitsize >= 0)                                                                        \
  215.     { int i,j,shc;                                                                              \
  216.       type sample1,sample2;                                                                     \
  217.       boolean left_works = TRUE, right_works = TRUE;                                            \
  218.       for (i = 0; i<100; i++)                                                                   \
  219.         { get_a_random(type,type_bitsize,sample1);                                              \
  220.           for (shc = 0; shc < type_bitsize; shc++)                                              \
  221.             { sample2 = sample1 << shc;                                                         \
  222.               for (j=0; j < type_bitsize; j++)                                                  \
  223.                 { if (!( ((sample2 & ((type)1<<j)) == 0)                                        \
  224.                          ==                                                                     \
  225.                          (j < shc ? TRUE : ((sample1 & ((type)1<<(j-shc))) == 0))               \
  226.                      ) )                                                                        \
  227.                     { left_works = FALSE; }                                                     \
  228.         }   }   }                                                                               \
  229.       for (i = 0; i<100; i++)                                                                   \
  230.         { get_a_random(type,type_bitsize,sample1);                                              \
  231.           for (shc = 0; shc < type_bitsize; shc++)                                              \
  232.             { sample2 = sample1 >> shc;                                                         \
  233.               for (j=0; j < type_bitsize; j++)                                                  \
  234.                 { if (!( ((sample2 & ((type)1<<j)) == 0)                                        \
  235.                          ==                                                                     \
  236.                          (j >= type_bitsize-shc ? TRUE : ((sample1 & ((type)1<<(j+shc))) == 0)) \
  237.                      ) )                                                                        \
  238.                     { right_works = FALSE; }                                                    \
  239.         }   }   }                                                                               \
  240.       if (!left_works)                                                                          \
  241.         { printf("#error \"Left shift of integers of t%spe %s does not work!!\"\n","y",typestr); } \
  242.       if (!right_works)                                                                         \
  243.         { printf("#error \"Right shift of integers of t%spe %s does not work!!\"\n","y",typestr); } \
  244.     }
  245. #define test_integer_sshift(type,typestr,type_bitsize)  \
  246.   if (type_bitsize >= 0)                                                                       \
  247.     { int i,j,shc;                                                                             \
  248.       type sample1,sample2;                                                                    \
  249.       boolean left_works = TRUE, right_works = TRUE;                                           \
  250.       for (i = 0; i<100; i++)                                                                  \
  251.         { get_a_random(type,type_bitsize,sample1);                                             \
  252.           for (shc = 0; shc < type_bitsize; shc++)                                             \
  253.             { sample2 = sample1 << shc;                                                        \
  254.               for (j=0; j < type_bitsize; j++)                                                 \
  255.                 { if (!( ((sample2 & ((type)1<<j)) == 0)                                       \
  256.                          ==                                                                    \
  257.                          (j < shc ? TRUE : ((sample1 & ((type)1<<(j-shc))) == 0))              \
  258.                      ) )                                                                       \
  259.                     { left_works = FALSE; }                                                    \
  260.         }   }   }                                                                              \
  261.       for (i = 0; i<100; i++)                                                                  \
  262.         { get_a_random(type,type_bitsize,sample1);                                             \
  263.           for (shc = 0; shc < type_bitsize; shc++)                                             \
  264.             { sample2 = sample1 >> shc;                                                        \
  265.               for (j=0; j < type_bitsize; j++)                                                 \
  266.                 { if (!( ((sample2 & ((type)1<<j)) == 0)                                       \
  267.                          ==                                                                    \
  268.                          ((sample1 & ((type)1<< (j+shc>=type_bitsize ? type_bitsize-1 : j+shc))) == 0) \
  269.                      ) )                                                                       \
  270.                     { right_works = FALSE; }                                                   \
  271.         }   }   }                                                                              \
  272.       if (!left_works)                                                                         \
  273.         { printf("#error \"Left shift of integers of t%spe %s does not work!!\"\n","y",typestr); } \
  274.       if (!right_works)                                                                        \
  275.         { printf("#error \"Right shift of integers of t%spe %s does not work!!\"\n","y",typestr); } \
  276.     }
  277.   test_integer_ushift(uchar,"unsigned char",uchar_bitsize);
  278.   test_integer_ushift(ushort,"unsigned short",ushort_bitsize);
  279.   test_integer_ushift(uint,"unsigned int",uint_bitsize);
  280.   test_integer_ushift(ulong,"unsigned long",ulong_bitsize);
  281. #ifdef HAVE_LONGLONG
  282.   test_integer_ushift(ulonglong,"unsigned long long",ulonglong_bitsize);
  283. #endif
  284.   test_integer_sshift(schar,"char",char_bitsize);
  285.   test_integer_sshift(short,"short",short_bitsize);
  286.   test_integer_sshift(int,"int",int_bitsize);
  287.   test_integer_sshift(long,"long",long_bitsize);
  288. #ifdef HAVE_LONGLONG
  289.   test_integer_sshift(longlong,"long long",longlong_bitsize);
  290. #endif
  291. }
  292.  
  293. main5() {
  294. #define test_integer_casts(type1,type2,typestr1,typestr2,type1_bitsize,type2_bitsize,want)  \
  295.   if (type1_bitsize <= type2_bitsize)                                                                      \
  296.     { int i,j;                                                                                             \
  297.       boolean modifies = FALSE;                                                                            \
  298.       boolean zero_extends = TRUE;                                                                         \
  299.       boolean sign_extends = TRUE;                                                                         \
  300.       for (i = 0; i<100; i++)                                                                              \
  301.         { type1 sample1;                                                                                   \
  302.           type2 sample2;                                                                                   \
  303.           get_a_random(type1,type1_bitsize,sample1);                                                       \
  304.           sample2 = (type2)sample1;                                                                        \
  305.           if (!(sample1 == (type1)sample2)) { modifies = TRUE; }                                           \
  306.           for (j = 0; j<type1_bitsize; j++)                                                                \
  307.             if (!( ((sample1 & ((type1)1<<j)) == 0) == ((sample2 & ((type2)1<<j)) == 0) ))                 \
  308.               { zero_extends = FALSE; sign_extends = FALSE; }                                              \
  309.           for (j = type1_bitsize; j<type2_bitsize; j++)                                                    \
  310.             if (!((sample2 & ((type2)1<<j)) == 0))                                                         \
  311.               { zero_extends = FALSE; }                                                                    \
  312.           for (j = type1_bitsize; j<type2_bitsize; j++)                                                    \
  313.             if (!( ((sample1 & ((type1)1<<(type1_bitsize-1))) == 0) == ((sample2 & ((type2)1<<j)) == 0) )) \
  314.               { sign_extends = FALSE; }                                                                    \
  315.         }                                                                                                  \
  316.       if (modifies)                                                                                        \
  317.         printf("#error \"Casts: (%s)(%s)(x) == x does not hold for every %s x !!\"\n",typestr1,typestr2,typestr1); \
  318.       if (zero_extends && sign_extends)                                                                    \
  319.         { if (!(type1_bitsize == type2_bitsize))                                                           \
  320.             printf("#error \"Casts from %s to %s works by identity!!\"\n",typestr1,typestr2);              \
  321.         }                                                                                                  \
  322.       if (zero_extends && !sign_extends)                                                                   \
  323.         { if ((type1_bitsize == type2_bitsize) || !(typestr1[0] == 'u') || !(want==1))                     \
  324.             printf("#error \"Casts from %s to %s works by zero-extend!!\"\n",typestr1,typestr2);           \
  325.         }                                                                                                  \
  326.       if (sign_extends && !zero_extends)                                                                   \
  327.         { if ((type1_bitsize == type2_bitsize) || (typestr1[0] == 'u') || !(want==2))                      \
  328.             printf("#error \"Casts from %s to %s works by sign-extend!!\"\n",typestr1,typestr2);           \
  329.         }                                                                                                  \
  330.       if (!sign_extends && !zero_extends)                                                                  \
  331.         printf("#error \"Casts from %s to %s works in an unknown manner!!\"\n",typestr1,typestr2);         \
  332.     }
  333.   # erst Casts zwischen Integers vermutlich gleicher Gr÷▀e:
  334.   test_integer_casts(schar,uchar,"char","unsigned char",char_bitsize,uchar_bitsize,0);
  335.   test_integer_casts(short,ushort,"short","unsigned short",short_bitsize,ushort_bitsize,0);
  336.   test_integer_casts(int,uint,"int","unsigned int",int_bitsize,uint_bitsize,0);
  337.   test_integer_casts(long,ulong,"long","unsigned long",long_bitsize,ulong_bitsize,0);
  338.   test_integer_casts(uchar,schar,"unsigned char","char",uchar_bitsize,char_bitsize,0);
  339.   test_integer_casts(ushort,short,"unsigned short","short",ushort_bitsize,short_bitsize,0);
  340.   test_integer_casts(uint,int,"unsigned int","int",uint_bitsize,int_bitsize,0);
  341.   test_integer_casts(ulong,long,"unsigned long","long",ulong_bitsize,long_bitsize,0);
  342. #ifdef HAVE_LONGLONG
  343.   test_integer_casts(longlong,ulonglong,"long long","unsigned long long",longlong_bitsize,ulonglong_bitsize,0);
  344.   test_integer_casts(ulonglong,longlong,"unsigned long long","long long",ulonglong_bitsize,longlong_bitsize,0);
  345. #endif
  346.   # dann Casts zwischen Integers unterschiedlicher Gr÷▀e, aber gleichen Vorzeichens:
  347.   test_integer_casts(uchar,ushort,"unsigned char","unsigned short",uchar_bitsize,ushort_bitsize,1);
  348.   test_integer_casts(uchar,uint,"unsigned char","unsigned int",uchar_bitsize,uint_bitsize,1);
  349.   test_integer_casts(uchar,ulong,"unsigned char","unsigned long",uchar_bitsize,ulong_bitsize,1);
  350.   test_integer_casts(ushort,uint,"unsigned short","unsigned int",ushort_bitsize,uint_bitsize,1);
  351.   test_integer_casts(ushort,ulong,"unsigned short","unsigned long",ushort_bitsize,ulong_bitsize,1);
  352.   test_integer_casts(uint,ulong,"unsigned int","unsigned long",uint_bitsize,ulong_bitsize,1);
  353. #ifdef HAVE_LONGLONG
  354.   test_integer_casts(uchar,ulonglong,"unsigned char","unsigned long long",uchar_bitsize,ulonglong_bitsize,1);
  355.   test_integer_casts(ushort,ulonglong,"unsigned short","unsigned long long",ushort_bitsize,ulonglong_bitsize,1);
  356.   test_integer_casts(uint,ulonglong,"unsigned int","unsigned long long",uint_bitsize,ulonglong_bitsize,1);
  357.   test_integer_casts(ulong,ulonglong,"unsigned long","unsigned long long",ulong_bitsize,ulonglong_bitsize,1);
  358. #endif
  359.   test_integer_casts(schar,short,"char","short",char_bitsize,short_bitsize,2);
  360.   test_integer_casts(schar,int,"char","int",char_bitsize,int_bitsize,2);
  361.   test_integer_casts(schar,long,"char","long",char_bitsize,long_bitsize,2);
  362.   test_integer_casts(short,int,"short","int",short_bitsize,int_bitsize,2);
  363.   test_integer_casts(short,long,"short","long",short_bitsize,long_bitsize,2);
  364.   test_integer_casts(int,long,"int","long",int_bitsize,long_bitsize,2);
  365. #ifdef HAVE_LONGLONG
  366.   test_integer_casts(schar,longlong,"char","long long",char_bitsize,longlong_bitsize,2);
  367.   test_integer_casts(short,longlong,"short","long long",short_bitsize,longlong_bitsize,2);
  368.   test_integer_casts(int,longlong,"int","long long",int_bitsize,longlong_bitsize,2);
  369.   test_integer_casts(long,longlong,"long","long long",long_bitsize,longlong_bitsize,2);
  370. #endif
  371.   # dann Casts zwischen Integers unterschiedlicher Gr÷▀e und unterschiedlichen Vorzeichens:
  372.   test_integer_casts(uchar,short,"unsigned char","short",uchar_bitsize,short_bitsize,1);
  373.   test_integer_casts(uchar,int,"unsigned char","int",uchar_bitsize,int_bitsize,1);
  374.   test_integer_casts(uchar,long,"unsigned char","long",uchar_bitsize,long_bitsize,1);
  375.   test_integer_casts(ushort,int,"unsigned short","int",ushort_bitsize,int_bitsize,1);
  376.   test_integer_casts(ushort,long,"unsigned short","long",ushort_bitsize,long_bitsize,1);
  377.   test_integer_casts(uint,long,"unsigned int","long",uint_bitsize,long_bitsize,1);
  378. #ifdef HAVE_LONGLONG
  379.   test_integer_casts(uchar,longlong,"unsigned char","long long",uchar_bitsize,longlong_bitsize,1);
  380.   test_integer_casts(ushort,longlong,"unsigned short","long long",ushort_bitsize,longlong_bitsize,1);
  381.   test_integer_casts(uint,longlong,"unsigned int","long long",uint_bitsize,longlong_bitsize,1);
  382.   test_integer_casts(ulong,longlong,"unsigned long","long long",ulong_bitsize,longlong_bitsize,1);
  383. #endif
  384.   test_integer_casts(schar,ushort,"char","unsigned short",char_bitsize,ushort_bitsize,2);
  385.   test_integer_casts(schar,uint,"char","unsigned int",char_bitsize,uint_bitsize,2);
  386.   test_integer_casts(schar,ulong,"char","unsigned long",char_bitsize,ulong_bitsize,2);
  387.   test_integer_casts(short,uint,"short","unsigned int",short_bitsize,uint_bitsize,2);
  388.   test_integer_casts(short,ulong,"short","unsigned long",short_bitsize,ulong_bitsize,2);
  389.   test_integer_casts(int,ulong,"int","unsigned long",int_bitsize,ulong_bitsize,2);
  390. #ifdef HAVE_LONGLONG
  391.   test_integer_casts(schar,ulonglong,"char","unsigned long long",char_bitsize,ulonglong_bitsize,2);
  392.   test_integer_casts(short,ulonglong,"short","unsigned long long",short_bitsize,ulonglong_bitsize,2);
  393.   test_integer_casts(int,ulonglong,"int","unsigned long long",int_bitsize,ulonglong_bitsize,2);
  394.   test_integer_casts(long,ulonglong,"long","unsigned long long",long_bitsize,ulonglong_bitsize,2);
  395. #endif
  396. }
  397.  
  398. main6() {
  399. #define check_sizeof_pointer(type,typestr)  \
  400.   { if (!(sizeof(type) <= sizeof(long)))                                 \
  401.       printf("#error \"Type %s does not fit into a long!!\"\n",typestr); \
  402.   }
  403.   check_sizeof_pointer(char*,"char *");
  404.   check_sizeof_pointer(long*,"long *");
  405.   check_sizeof_pointer(function*,"function *");
  406.   pointer_bitsize = char_bitsize * sizeof(char*);
  407.   printf("/* Pointers of t%spe %s have %ld bits. */\n","y","char *",(long)pointer_bitsize);
  408.   printf("#define pointer_bitsize %ld\n",(long)pointer_bitsize);
  409.   printf("\n");
  410. }
  411.  
  412. main7() {
  413. #define test_pointer_casts(type1,type2,typestr1,typestr2)  \
  414.   if (!(sizeof(type1) == sizeof(type2)))                                                               \
  415.     { printf("#error \"Pointer types %s and %s have different sizes!!\"\n",typestr1,typestr2); }       \
  416.     else                                                                                               \
  417.     { int i;                                                                                           \
  418.       ulong differences1 = 0, differences2 = 0;                                                        \
  419.       for (i = 0; i<100; i++)                                                                          \
  420.         { ulong sample;                                                                                \
  421.           type1 sample1;                                                                               \
  422.           type2 sample2;                                                                               \
  423.           get_a_random(ulong,ulong_bitsize,sample);                                                    \
  424.           sample1 = (type1)sample;                                                                     \
  425.           sample2 = (type2)sample;                                                                     \
  426.           differences1 |= ((ulong)sample1 ^ (ulong)(type1)(sample2));                                  \
  427.           differences2 |= ((ulong)sample2 ^ (ulong)(type2)(sample1));                                  \
  428.         }                                                                                              \
  429.       if (differences1==0)                                                                             \
  430.         printf("/* Casts from %s to %s is OK (does nothing). */\n",typestr2,typestr1);                 \
  431.       else                                                                                             \
  432.       if (differences1 == ~(ulong)0)                                                                   \
  433.         printf("#error \"Casts from %s to %s work in an unknown way!!\"\n",typestr2,typestr1);         \
  434.       else                                                                                             \
  435.         printf("#error \"Casts from %s to %s modify part 0x%8X of pointer!!\"\n",typestr2,typestr1,differences1); \
  436.       if (differences2==0)                                                                             \
  437.         printf("/* Casts from %s to %s is OK (does nothing). */\n",typestr1,typestr2);                 \
  438.       else                                                                                             \
  439.       if (differences2 == ~(ulong)0)                                                                   \
  440.         printf("#error \"Casts from %s to %s work in an unknown way!!\"\n",typestr1,typestr2);         \
  441.       else                                                                                             \
  442.         printf("#error \"Casts from %s to %s modify part 0x%8X of pointer!!\"\n",typestr1,typestr2,differences2); \
  443.     }
  444.   test_pointer_casts(char*,long*,"char *","long *");
  445.   test_pointer_casts(char*,function*,"char *","function *");
  446.   printf("\n");
  447. }
  448.  
  449. main8() {
  450. #define alignmentof(type)  \
  451.   (int)(&((struct { char dummy1; type dummy2; } *)0)->dummy2)
  452. #define get_alignment(type,typestr)  \
  453.   { printf("/* Type %s has sizeof = %ld and alignment = %ld. */\n",typestr,(long)sizeof(type),(long)alignmentof(type)); \
  454.     if (!(typestr[0] == 'u') && !(typestr[string_length(typestr)-1] == '*'))                                            \
  455.       { printf("#define sizeof_"); printf_underscored(typestr); printf(" %ld\n",(long)sizeof(type));                    \
  456.         printf("#define alignment_"); printf_underscored(typestr); printf(" %ld\n",(long)alignmentof(type));            \
  457.       }                                                                                                                 \
  458.    {int align = alignmentof(type);                                                                                      \
  459.     if (!((align & (align-1)) == 0))                                                                                    \
  460.       printf("#error \"The alignment %ld of t%spe %s is not a power of two!!\"\n",(long)align,"y",typestr);             \
  461.    }                                                                                                                    \
  462.     printf("\n");                                                                                                       \
  463.   }
  464.   get_alignment(char,"char"); get_alignment(uchar,"unsigned char");
  465.   get_alignment(short,"short"); get_alignment(ushort,"unsigned short");
  466.   get_alignment(int,"int"); get_alignment(uint,"unsigned int");
  467.   get_alignment(long,"long"); get_alignment(ulong,"unsigned long");
  468. #ifdef HAVE_LONGLONG
  469.   get_alignment(longlong,"long long"); get_alignment(ulonglong,"unsigned long long");
  470. #endif
  471.   get_alignment(float,"float");
  472.   get_alignment(double,"double");
  473.   get_alignment(char*,"char *");
  474.   get_alignment(long*,"long *");
  475.   get_alignment(function*,"function *");
  476. }
  477.  
  478. main9() {
  479. #define get_endian(type,typestr,type_bitsize)  \
  480.   { if (type_bitsize == uchar_bitsize * sizeof(type))                                            \
  481.       { auto union { uchar einzeln[sizeof(type)]; type gesamt; } x;                              \
  482.         int i,j;                                                                                 \
  483.         boolean big_endian = TRUE;                                                               \
  484.         boolean little_endian = TRUE;                                                            \
  485.         for (i = 0; i<100; i++)                                                                  \
  486.           { type sample;                                                                         \
  487.             get_a_random(type,type_bitsize,sample);                                              \
  488.             x.gesamt = sample;                                                                   \
  489.             for (j = 0; j<sizeof(type); j++, sample >>= uchar_bitsize)                           \
  490.               { if (!( (sample & (((type)1<<uchar_bitsize)-1)) == x.einzeln[j] ))                \
  491.                   { little_endian = FALSE; }                                                     \
  492.                 if (!( (sample & (((type)1<<uchar_bitsize)-1)) == x.einzeln[sizeof(type)-1-j] )) \
  493.                   { big_endian = FALSE; }                                                        \
  494.           }   }                                                                                  \
  495.         if (big_endian && little_endian)                                                         \
  496.           { if (!(sizeof(type) == 1))                                                            \
  497.               printf("#error \"Endianness of t%spe %s in memory doesn't matter.\"\n","y",typestr); } \
  498.         if (big_endian && !little_endian)                                                        \
  499.           { printf("/* Type %s is stored BIG-ENDIAN in memory (i.e. like mc68000 or sparc). */\n",typestr); \
  500.             printf("#define "); printf_underscored(&typestr[9]); printf("_big_endian\n");        \
  501.           }                                                                                      \
  502.         if (little_endian && !big_endian)                                                        \
  503.           { printf("/* Type %s is stored LITTLE-ENDIAN in memory (i.e. like Z80 or VAX). */\n",typestr); \
  504.             printf("#define "); printf_underscored(&typestr[9]); printf("_little_endian\n");     \
  505.           }                                                                                      \
  506.         if (!big_endian && !little_endian)                                                       \
  507.           { printf("#error \"Type %s is stored in memory in an obscure manner!!\"\n",typestr); } \
  508.       }                                                                                          \
  509.       else                                                                                       \
  510.       { printf("#error \"Endianness makes no sense for t%spe %s !!\"\n","y",typestr); }          \
  511.   }
  512.   get_endian(uchar,"unsigned char",uchar_bitsize);
  513.   get_endian(ushort,"unsigned short",ushort_bitsize);
  514.   get_endian(uint,"unsigned int",uint_bitsize);
  515.   get_endian(ulong,"unsigned long",ulong_bitsize);
  516. #ifdef HAVE_LONGLONG
  517.   get_endian(ulonglong,"unsigned long long",ulonglong_bitsize);
  518. #endif
  519.   printf("\n");
  520. }
  521.  
  522. long get_stack_direction()
  523.   { auto char dummy;
  524.     static char* dummyaddr = (char*)0;
  525.     if (!(dummyaddr == (char*)0))
  526.       { return (&dummy) - dummyaddr; }
  527.     else
  528.       { dummyaddr = &dummy; return get_stack_direction(); }
  529.   }
  530.  
  531. main10()
  532.   { long stack_direction = get_stack_direction();
  533.     if (stack_direction > 0)
  534.       { printf("/* Stack grows up, ca. %ld bytes per function call. */\n",(long)stack_direction);
  535.         printf("#define stack_grows_up\n");
  536.       }
  537.     else if (stack_direction < 0)
  538.       { printf("/* Stack grows down, ca. %ld bytes per function call. */\n",-(long)stack_direction);
  539.         printf("#define stack_grows_down\n");
  540.       }
  541.     else
  542.       printf("#error \"Unknown stack model -- incorrect C semantics!!\"\n");
  543.   }
  544.  
  545. main()
  546. { main1();
  547.   main2();
  548.   main3();
  549.   main4();
  550.   main5();
  551.   main6();
  552.   main7();
  553.   main8();
  554.   main9();
  555.   main10();
  556.   if (ferror(stdout)) { exit(1); }
  557.   exit(0);
  558. }
  559.