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/* Bestimmung einiger Maschinen-Parameter und -Abhängigkeiten *//* und Ausgabe in ein Include-File *//* Bruno Haible 10.9.1991, 12.10.1992, 6.12.1992, 24.10.1993 */
/* Auf einigen Systemen werden in <sys/types.h> die Typen uchar, ushort, uint, *//* ulong definiert. Normalerweise reicht _POSIX_SOURCE aus, dies zu verhindern, *//* bei AIX 3.2.5 (rs6000-ibm-aix3.2.5) jedoch nicht. Wir müssen Gewalt anwenden. */#define _POSIX_SOURCE
#define uchar os_uchar
#define ushort os_ushort
#define uint os_uint
#define ulong os_ulong
#include <stdio.h>
#undef ulong
#undef uint
#undef ushort
#undef uchar
#define loop while(1)
typedef int boolean;#define TRUE 1
#define FALSE 0
#ifdef __CHAR_UNSIGNED__
typedef signed char schar;#else
typedef char schar;#endif
typedef unsigned char uchar;typedef unsigned short ushort;typedef unsigned /* int */ uint;typedef unsigned long ulong;#ifdef HAVE_LONGLONG
typedef long long longlong;typedef unsigned long long ulonglong;#endif
typedef int (function)();
static int random_table[256] = /* 2048 zufällige Bits, hier von pi */ { 0xC9,0x0F,0xDA,0xA2,0x21,0x68,0xC2,0x34,0xC4,0xC6,0x62,0x8B, 0x80,0xDC,0x1C,0xD1,0x29,0x02,0x4E,0x08,0x8A,0x67,0xCC,0x74, 0x02,0x0B,0xBE,0xA6,0x3B,0x13,0x9B,0x22,0x51,0x4A,0x08,0x79, 0x8E,0x34,0x04,0xDD,0xEF,0x95,0x19,0xB3,0xCD,0x3A,0x43,0x1B, 0x30,0x2B,0x0A,0x6D,0xF2,0x5F,0x14,0x37,0x4F,0xE1,0x35,0x6D, 0x6D,0x51,0xC2,0x45,0xE4,0x85,0xB5,0x76,0x62,0x5E,0x7E,0xC6, 0xF4,0x4C,0x42,0xE9,0xA6,0x37,0xED,0x6B,0x0B,0xFF,0x5C,0xB6, 0xF4,0x06,0xB7,0xED,0xEE,0x38,0x6B,0xFB,0x5A,0x89,0x9F,0xA5, 0xAE,0x9F,0x24,0x11,0x7C,0x4B,0x1F,0xE6,0x49,0x28,0x66,0x51, 0xEC,0xE4,0x5B,0x3D,0xC2,0x00,0x7C,0xB8,0xA1,0x63,0xBF,0x05, 0x98,0xDA,0x48,0x36,0x1C,0x55,0xD3,0x9A,0x69,0x16,0x3F,0xA8, 0xFD,0x24,0xCF,0x5F,0x83,0x65,0x5D,0x23,0xDC,0xA3,0xAD,0x96, 0x1C,0x62,0xF3,0x56,0x20,0x85,0x52,0xBB,0x9E,0xD5,0x29,0x07, 0x70,0x96,0x96,0x6D,0x67,0x0C,0x35,0x4E,0x4A,0xBC,0x98,0x04, 0xF1,0x74,0x6C,0x08,0xCA,0x18,0x21,0x7C,0x32,0x90,0x5E,0x46, 0x2E,0x36,0xCE,0x3B,0xE3,0x9E,0x77,0x2C,0x18,0x0E,0x86,0x03, 0x9B,0x27,0x83,0xA2,0xEC,0x07,0xA2,0x8F,0xB5,0xC5,0x5D,0xF0, 0x6F,0x4C,0x52,0xC9,0xDE,0x2B,0xCB,0xF6,0x95,0x58,0x17,0x18, 0x39,0x95,0x49,0x7C,0xEA,0x95,0x6A,0xE5,0x15,0xD2,0x26,0x18, 0x98,0xFA,0x05,0x10,0x15,0x72,0x8E,0x5A,0x8A,0xAA,0xC4,0x2D, 0xAD,0x33,0x17,0x0D,0x04,0x50,0x7A,0x33,0xA8,0x55,0x21,0xAB, 0xDF,0x1C,0xBA,0x65, };#define random_table_length (8*256)
static int random_position = -1;int next_random_bit(void) { random_position++; if (random_position==random_table_length) random_position = 0; return (random_table[random_position/8] >> (random_position % 8)) & 1; }
void printf_underscored (const char* string) { char c; while (!((c = *string++) == '\0')) { printf("%c",(c==' ' ? '_' : c)); } }
/* string_length(string) is the same as strlen(string). *//* Better avoid to depend on <string.h>. */int string_length (char* string) { int count = 0; while (!(*string++ == '\0')) { count++; } return count; }
static int char_bitsize, short_bitsize, int_bitsize, long_bitsize;static int uchar_bitsize, ushort_bitsize, uint_bitsize, ulong_bitsize;static boolean char_uchar_same, short_ushort_same, int_uint_same, long_ulong_same;static int pointer_bitsize;#ifdef HAVE_LONGLONG
static int longlong_bitsize, ulonglong_bitsize;static boolean longlong_ulonglong_same;#endif
void main1(void) {#define get_unsigned_integer_bitsize(type,where) \
{ type x = 1; \ int bits = 0; \ loop { \ if (x==0) break; \ x = x+x; \ bits++; \ if (bits==1000) { bits = -1; break; } \ } \ where = bits; \ }#define get_signed_integer_bitsize(type,unsigned_type,where) \
{ /* Signed integer overflow is "undefined behaviour" in C99, and gcc-4.3 \
(without -fwrapv option) actually does weird things when signed integer \ overflow occurs. Therefore perform the addition on the unsigned type. \ Drawback: This will not detect cases where the signed type has more bits\ than the unsigned type but the same size according to sizeof. Blech. */ \ type x = 1; \ int bits = 0; \ loop { \ if (x==0) break; \ x = (unsigned_type)x + (unsigned_type)x;\ bits++; \ if (bits==1000) { bits = -1; break; } \ } \ where = bits; \ }#define print_integer_bitsize(type,typestr,where) \
{ if (where >= 0) \ { printf("/* Integers of type %s have %ld bits. */\n",typestr,(long)where); \ if (!(typestr[0] == 'u')) \ { printf("#define "); printf_underscored(typestr); printf("_bitsize %ld\n",(long)where); } \ printf("\n"); \ } \ else \ { printf("#error \"Integers of type %s have no binary representation!!\"\n",typestr); } \ if (!(where == char_bitsize * sizeof(type))) \ { printf("#error \"Formula BITSIZE(T) = SIZEOF(T) * BITSPERBYTE does not hold for type %s!!\"\n",typestr); } \ } get_signed_integer_bitsize(schar,uchar,char_bitsize); get_signed_integer_bitsize(short,ushort,short_bitsize); get_signed_integer_bitsize(int,uint,int_bitsize); get_signed_integer_bitsize(long,ulong,long_bitsize); print_integer_bitsize(schar,"char",char_bitsize); print_integer_bitsize(short,"short",short_bitsize); print_integer_bitsize(int,"int",int_bitsize); print_integer_bitsize(long,"long",long_bitsize);#ifdef HAVE_LONGLONG
get_signed_integer_bitsize(longlong,ulonglong,longlong_bitsize); print_integer_bitsize(longlong,"long long",longlong_bitsize);#endif
get_unsigned_integer_bitsize(uchar,uchar_bitsize); get_unsigned_integer_bitsize(ushort,ushort_bitsize); get_unsigned_integer_bitsize(uint,uint_bitsize); get_unsigned_integer_bitsize(ulong,ulong_bitsize); print_integer_bitsize(uchar,"unsigned char",uchar_bitsize); print_integer_bitsize(ushort,"unsigned short",ushort_bitsize); print_integer_bitsize(uint,"unsigned int",uint_bitsize); print_integer_bitsize(ulong,"unsigned long",ulong_bitsize);#ifdef HAVE_LONGLONG
get_unsigned_integer_bitsize(ulonglong,ulonglong_bitsize); print_integer_bitsize(ulonglong,"unsigned long long",ulonglong_bitsize);#endif
}
void main2(void) {#define compare_integer_bitsizes(typestr1,typestr2,type1_bitsize,type2_bitsize) \
{ if (!(type1_bitsize==type2_bitsize)) \ printf("#error \"Integer types %s and %s have different sizes!!\"\n",typestr1,typestr2); \ } compare_integer_bitsizes("char","unsigned char",char_bitsize,uchar_bitsize); compare_integer_bitsizes("short","unsigned short",short_bitsize,ushort_bitsize); compare_integer_bitsizes("int","unsigned int",int_bitsize,uint_bitsize); compare_integer_bitsizes("long","unsigned long",long_bitsize,ulong_bitsize);#ifdef HAVE_LONGLONG
compare_integer_bitsizes("long long","unsigned long long",longlong_bitsize,ulonglong_bitsize);#endif
}
#define get_a_random(type,bitsize,where) \
{ type x = 0; \ int i = bitsize; \ while (i>0) { x = (x<<1) + next_random_bit(); i--; } \ where = x; \ }#define get_a_random_twice(type1,type2,bitsize,where1,where2) \
{ type1 x1 = 0; type2 x2 = 0; \ int i = bitsize; \ while (i>0) \ { type1 b = next_random_bit(); \ x1 = ((x1<<1) + b); x2 = ((x2<<1) + b); \ i--; \ } \ where1 = x1; where2 = x2; \ }
void main3(void) {#define compare_integer_representation(type1,type2,typestr1,typestr2,type1_bitsize,type2_bitsize,where) \
{ if ((type1_bitsize>=0) && (type2_bitsize>=0) && (type1_bitsize==type2_bitsize)) \ { int i,j; \ type1 sample1; type2 sample2; \ where = TRUE; \ for (i = 0; i<100; i++) \ { get_a_random_twice(type1,type2,type1_bitsize,sample1,sample2); \ if (!(sample1 == (type1)(sample2))) { where = FALSE; } \ if (!(sample2 == (type2)(sample1))) { where = FALSE; } \ } \ for (i = 0; i<100; i++) \ { get_a_random(type1,type1_bitsize,sample1); \ sample2 = (type2)(sample1); \ for (j = 0; j < type1_bitsize; j++) \ if (!( ((sample1 & ((type1)1<<j)) == 0) \ == ((sample2 & ((type2)1<<j)) == 0) \ ) ) \ { where = FALSE; } \ } \ if (where) \ { printf("/* Integer types %s and %s have the same binary representation. */\n",typestr1,typestr2); } \ else \ { printf("#error \"Integer types %s and %s have different binary representations!!\"\n",typestr1,typestr2); } \ } \ else \ { where = FALSE; } \ } compare_integer_representation(schar,uchar,"char","unsigned char",char_bitsize,uchar_bitsize,char_uchar_same); compare_integer_representation(short,ushort,"short","unsigned short",short_bitsize,ushort_bitsize,short_ushort_same); compare_integer_representation(int,uint,"int","unsigned int",int_bitsize,uint_bitsize,int_uint_same); compare_integer_representation(long,ulong,"long","unsigned long",long_bitsize,ulong_bitsize,long_ulong_same);#ifdef HAVE_LONGLONG
compare_integer_representation(longlong,ulonglong,"long long","unsigned long long",longlong_bitsize,ulonglong_bitsize,longlong_ulonglong_same);#endif
printf("\n");}
void main4(void) {#define test_integer_ushift(type,typestr,type_bitsize) \
if (type_bitsize >= 0) \ { int i,j,shc; \ type sample1,sample2; \ boolean left_works = TRUE, right_works = TRUE; \ for (i = 0; i<100; i++) \ { get_a_random(type,type_bitsize,sample1); \ for (shc = 0; shc < type_bitsize; shc++) \ { sample2 = sample1 << shc; \ for (j=0; j < type_bitsize; j++) \ { if (!( ((sample2 & ((type)1<<j)) == 0) \ == \ (j < shc ? TRUE : ((sample1 & ((type)1<<(j-shc))) == 0)) \ ) ) \ { left_works = FALSE; } \ } } } \ for (i = 0; i<100; i++) \ { get_a_random(type,type_bitsize,sample1); \ for (shc = 0; shc < type_bitsize; shc++) \ { sample2 = sample1 >> shc; \ for (j=0; j < type_bitsize; j++) \ { if (!( ((sample2 & ((type)1<<j)) == 0) \ == \ (j >= type_bitsize-shc ? TRUE : ((sample1 & ((type)1<<(j+shc))) == 0)) \ ) ) \ { right_works = FALSE; } \ } } } \ if (!left_works) \ { printf("#error \"Left shift of integers of type %s does not work!!\"\n",typestr); } \ if (!right_works) \ { printf("#error \"Right shift of integers of type %s does not work!!\"\n",typestr); } \ }#define test_integer_sshift(type,typestr,type_bitsize) \
if (type_bitsize >= 0) \ { int i,j,shc; \ type sample1,sample2; \ boolean left_works = TRUE, right_works = TRUE; \ for (i = 0; i<100; i++) \ { get_a_random(type,type_bitsize,sample1); \ for (shc = 0; shc < type_bitsize; shc++) \ { sample2 = sample1 << shc; \ for (j=0; j < type_bitsize; j++) \ { if (!( ((sample2 & ((type)1<<j)) == 0) \ == \ (j < shc ? TRUE : ((sample1 & ((type)1<<(j-shc))) == 0)) \ ) ) \ { left_works = FALSE; } \ } } } \ for (i = 0; i<100; i++) \ { get_a_random(type,type_bitsize,sample1); \ for (shc = 0; shc < type_bitsize; shc++) \ { sample2 = sample1 >> shc; \ for (j=0; j < type_bitsize; j++) \ { if (!( ((sample2 & ((type)1<<j)) == 0) \ == \ ((sample1 & ((type)1<< (j+shc>=type_bitsize ? type_bitsize-1 : j+shc))) == 0) \ ) ) \ { right_works = FALSE; } \ } } } \ if (!left_works) \ { printf("#error \"Left shift of integers of type %s does not work!!\"\n",typestr); } \ if (!right_works) \ { printf("#error \"Right shift of integers of type %s does not work!!\"\n",typestr); } \ } test_integer_ushift(uchar,"unsigned char",uchar_bitsize); test_integer_ushift(ushort,"unsigned short",ushort_bitsize); test_integer_ushift(uint,"unsigned int",uint_bitsize); test_integer_ushift(ulong,"unsigned long",ulong_bitsize);#ifdef HAVE_LONGLONG
test_integer_ushift(ulonglong,"unsigned long long",ulonglong_bitsize);#endif
test_integer_sshift(schar,"char",char_bitsize); test_integer_sshift(short,"short",short_bitsize); test_integer_sshift(int,"int",int_bitsize); test_integer_sshift(long,"long",long_bitsize);#ifdef HAVE_LONGLONG
test_integer_sshift(longlong,"long long",longlong_bitsize);#endif
}
void main5(void) {#define test_integer_casts(type1,type2,typestr1,typestr2,type1_bitsize,type2_bitsize,want) \
if (type1_bitsize <= type2_bitsize) \ { int i,j; \ boolean modifies = FALSE; \ boolean zero_extends = TRUE; \ boolean sign_extends = TRUE; \ for (i = 0; i<100; i++) \ { type1 sample1; \ type2 sample2; \ get_a_random(type1,type1_bitsize,sample1); \ sample2 = (type2)sample1; \ if (!(sample1 == (type1)sample2)) { modifies = TRUE; } \ for (j = 0; j<type1_bitsize; j++) \ if (!( ((sample1 & ((type1)1<<j)) == 0) == ((sample2 & ((type2)1<<j)) == 0) )) \ { zero_extends = FALSE; sign_extends = FALSE; } \ for (j = type1_bitsize; j<type2_bitsize; j++) \ if (!((sample2 & ((type2)1<<j)) == 0)) \ { zero_extends = FALSE; } \ for (j = type1_bitsize; j<type2_bitsize; j++) \ if (!( ((sample1 & ((type1)1<<(type1_bitsize-1))) == 0) == ((sample2 & ((type2)1<<j)) == 0) )) \ { sign_extends = FALSE; } \ } \ if (modifies) \ printf("#error \"Casts: (%s)(%s)(x) == x does not hold for every %s x !!\"\n",typestr1,typestr2,typestr1); \ if (zero_extends && sign_extends) \ { if (!(type1_bitsize == type2_bitsize)) \ printf("#error \"Casts from %s to %s works by identity!!\"\n",typestr1,typestr2); \ } \ if (zero_extends && !sign_extends) \ { if ((type1_bitsize == type2_bitsize) || !(typestr1[0] == 'u') || !(want==1)) \ printf("#error \"Casts from %s to %s works by zero-extend!!\"\n",typestr1,typestr2); \ } \ if (sign_extends && !zero_extends) \ { if ((type1_bitsize == type2_bitsize) || (typestr1[0] == 'u') || !(want==2)) \ printf("#error \"Casts from %s to %s works by sign-extend!!\"\n",typestr1,typestr2); \ } \ if (!sign_extends && !zero_extends) \ printf("#error \"Casts from %s to %s works in an unknown manner!!\"\n",typestr1,typestr2); \ } /* erst Casts zwischen Integers vermutlich gleicher Größe: */ test_integer_casts(schar,uchar,"char","unsigned char",char_bitsize,uchar_bitsize,0); test_integer_casts(short,ushort,"short","unsigned short",short_bitsize,ushort_bitsize,0); test_integer_casts(int,uint,"int","unsigned int",int_bitsize,uint_bitsize,0); test_integer_casts(long,ulong,"long","unsigned long",long_bitsize,ulong_bitsize,0); test_integer_casts(uchar,schar,"unsigned char","char",uchar_bitsize,char_bitsize,0); test_integer_casts(ushort,short,"unsigned short","short",ushort_bitsize,short_bitsize,0); test_integer_casts(uint,int,"unsigned int","int",uint_bitsize,int_bitsize,0); test_integer_casts(ulong,long,"unsigned long","long",ulong_bitsize,long_bitsize,0);#ifdef HAVE_LONGLONG
test_integer_casts(longlong,ulonglong,"long long","unsigned long long",longlong_bitsize,ulonglong_bitsize,0); test_integer_casts(ulonglong,longlong,"unsigned long long","long long",ulonglong_bitsize,longlong_bitsize,0);#endif
/* dann Casts zwischen Integers unterschiedlicher Größe, aber gleichen Vorzeichens: */ test_integer_casts(uchar,ushort,"unsigned char","unsigned short",uchar_bitsize,ushort_bitsize,1); test_integer_casts(uchar,uint,"unsigned char","unsigned int",uchar_bitsize,uint_bitsize,1); test_integer_casts(uchar,ulong,"unsigned char","unsigned long",uchar_bitsize,ulong_bitsize,1); test_integer_casts(ushort,uint,"unsigned short","unsigned int",ushort_bitsize,uint_bitsize,1); test_integer_casts(ushort,ulong,"unsigned short","unsigned long",ushort_bitsize,ulong_bitsize,1); test_integer_casts(uint,ulong,"unsigned int","unsigned long",uint_bitsize,ulong_bitsize,1);#ifdef HAVE_LONGLONG
test_integer_casts(uchar,ulonglong,"unsigned char","unsigned long long",uchar_bitsize,ulonglong_bitsize,1); test_integer_casts(ushort,ulonglong,"unsigned short","unsigned long long",ushort_bitsize,ulonglong_bitsize,1); test_integer_casts(uint,ulonglong,"unsigned int","unsigned long long",uint_bitsize,ulonglong_bitsize,1); test_integer_casts(ulong,ulonglong,"unsigned long","unsigned long long",ulong_bitsize,ulonglong_bitsize,1);#endif
test_integer_casts(schar,short,"char","short",char_bitsize,short_bitsize,2); test_integer_casts(schar,int,"char","int",char_bitsize,int_bitsize,2); test_integer_casts(schar,long,"char","long",char_bitsize,long_bitsize,2); test_integer_casts(short,int,"short","int",short_bitsize,int_bitsize,2); test_integer_casts(short,long,"short","long",short_bitsize,long_bitsize,2); test_integer_casts(int,long,"int","long",int_bitsize,long_bitsize,2);#ifdef HAVE_LONGLONG
test_integer_casts(schar,longlong,"char","long long",char_bitsize,longlong_bitsize,2); test_integer_casts(short,longlong,"short","long long",short_bitsize,longlong_bitsize,2); test_integer_casts(int,longlong,"int","long long",int_bitsize,longlong_bitsize,2); test_integer_casts(long,longlong,"long","long long",long_bitsize,longlong_bitsize,2);#endif
/* dann Casts zwischen Integers unterschiedlicher Größe und unterschiedlichen Vorzeichens: */ test_integer_casts(uchar,short,"unsigned char","short",uchar_bitsize,short_bitsize,1); test_integer_casts(uchar,int,"unsigned char","int",uchar_bitsize,int_bitsize,1); test_integer_casts(uchar,long,"unsigned char","long",uchar_bitsize,long_bitsize,1); test_integer_casts(ushort,int,"unsigned short","int",ushort_bitsize,int_bitsize,1); test_integer_casts(ushort,long,"unsigned short","long",ushort_bitsize,long_bitsize,1); test_integer_casts(uint,long,"unsigned int","long",uint_bitsize,long_bitsize,1);#ifdef HAVE_LONGLONG
test_integer_casts(uchar,longlong,"unsigned char","long long",uchar_bitsize,longlong_bitsize,1); test_integer_casts(ushort,longlong,"unsigned short","long long",ushort_bitsize,longlong_bitsize,1); test_integer_casts(uint,longlong,"unsigned int","long long",uint_bitsize,longlong_bitsize,1); test_integer_casts(ulong,longlong,"unsigned long","long long",ulong_bitsize,longlong_bitsize,1);#endif
test_integer_casts(schar,ushort,"char","unsigned short",char_bitsize,ushort_bitsize,2); test_integer_casts(schar,uint,"char","unsigned int",char_bitsize,uint_bitsize,2); test_integer_casts(schar,ulong,"char","unsigned long",char_bitsize,ulong_bitsize,2); test_integer_casts(short,uint,"short","unsigned int",short_bitsize,uint_bitsize,2); test_integer_casts(short,ulong,"short","unsigned long",short_bitsize,ulong_bitsize,2); test_integer_casts(int,ulong,"int","unsigned long",int_bitsize,ulong_bitsize,2);#ifdef HAVE_LONGLONG
test_integer_casts(schar,ulonglong,"char","unsigned long long",char_bitsize,ulonglong_bitsize,2); test_integer_casts(short,ulonglong,"short","unsigned long long",short_bitsize,ulonglong_bitsize,2); test_integer_casts(int,ulonglong,"int","unsigned long long",int_bitsize,ulonglong_bitsize,2); test_integer_casts(long,ulonglong,"long","unsigned long long",long_bitsize,ulonglong_bitsize,2);#endif
}
void main6(void) {#define check_sizeof_pointer(type,typestr) \
{ if (!(sizeof(type) <= sizeof(long))) \ printf("#error \"Type %s does not fit into a long!!\"\n",typestr); \ } check_sizeof_pointer(char*,"char *"); check_sizeof_pointer(long*,"long *"); check_sizeof_pointer(function*,"function *"); pointer_bitsize = char_bitsize * sizeof(char*); printf("/* Pointers of type %s have %ld bits. */\n","char *",(long)pointer_bitsize); printf("#define pointer_bitsize %ld\n",(long)pointer_bitsize); printf("\n");}
void main7(void) {#define test_pointer_casts(type1,type2,typestr1,typestr2) \
if (!(sizeof(type1) == sizeof(type2))) \ { printf("#error \"Pointer types %s and %s have different sizes!!\"\n",typestr1,typestr2); } \ else \ { int i; \ ulong differences1 = 0, differences2 = 0; \ for (i = 0; i<100; i++) \ { ulong sample; \ type1 sample1; \ type2 sample2; \ get_a_random(ulong,ulong_bitsize,sample); \ sample1 = (type1)sample; \ sample2 = (type2)sample; \ differences1 |= ((ulong)sample1 ^ (ulong)(type1)(sample2)); \ differences2 |= ((ulong)sample2 ^ (ulong)(type2)(sample1)); \ } \ if (differences1==0) \ printf("/* Casts from %s to %s is OK (does nothing). */\n",typestr2,typestr1); \ else \ if (differences1 == ~(ulong)0) \ printf("#error \"Casts from %s to %s work in an unknown way!!\"\n",typestr2,typestr1); \ else \ printf("#error \"Casts from %s to %s modify part 0x%8lX of pointer!!\"\n",typestr2,typestr1,differences1); \ if (differences2==0) \ printf("/* Casts from %s to %s is OK (does nothing). */\n",typestr1,typestr2); \ else \ if (differences2 == ~(ulong)0) \ printf("#error \"Casts from %s to %s work in an unknown way!!\"\n",typestr1,typestr2); \ else \ printf("#error \"Casts from %s to %s modify part 0x%8lX of pointer!!\"\n",typestr1,typestr2,differences2); \ } test_pointer_casts(char*,long*,"char *","long *"); test_pointer_casts(char*,function*,"char *","function *"); printf("\n");}
void main8(void) {/* The following macro works only in C, not in C++, because C++ restricts the
use of NULL pointers and also because C++ forbids defining types within a cast. */#define alignmentof(type) \
(int)(&((struct { char dummy1; type dummy2; } *)0)->dummy2)#define get_alignment(type,typestr) \
{ struct { char dummy1; type dummy2; } dummy; \ long alignment = (char*)&dummy.dummy2 - (char*)&dummy; \ printf("/* Type %s has sizeof = %ld and alignment = %ld. */\n",typestr,(long)sizeof(type),alignment); \ if (!(typestr[0] == 'u') && !(typestr[string_length(typestr)-1] == '*')) \ { printf("#define sizeof_"); printf_underscored(typestr); printf(" %ld\n",(long)sizeof(type)); \ printf("#define alignment_"); printf_underscored(typestr); printf(" %ld\n",alignment); \ } \ if (!((alignment & (alignment-1)) == 0)) \ printf("#error \"The alignment %ld of type %s is not a power of two!!\"\n",alignment,typestr); \ printf("\n"); \ } get_alignment(char,"char"); get_alignment(uchar,"unsigned char"); get_alignment(short,"short"); get_alignment(ushort,"unsigned short"); get_alignment(int,"int"); get_alignment(uint,"unsigned int"); get_alignment(long,"long"); get_alignment(ulong,"unsigned long");#ifdef HAVE_LONGLONG
get_alignment(longlong,"long long"); get_alignment(ulonglong,"unsigned long long");#endif
get_alignment(float,"float"); get_alignment(double,"double"); get_alignment(char*,"char *"); get_alignment(long*,"long *"); get_alignment(function*,"function *");}
void main9(void) {#define get_endian(type,typestr,type_bitsize) \
{ if (type_bitsize == uchar_bitsize * sizeof(type)) \ { auto union { uchar einzeln[sizeof(type)]; type gesamt; } x; \ int i,j; \ boolean big_endian = TRUE; \ boolean little_endian = TRUE; \ for (i = 0; i<100; i++) \ { type sample; \ get_a_random(type,type_bitsize,sample); \ x.gesamt = sample; \ for (j = 0; j<sizeof(type); j++, sample >>= uchar_bitsize) \ { if (!( (sample & (((type)1<<uchar_bitsize)-1)) == x.einzeln[j] )) \ { little_endian = FALSE; } \ if (!( (sample & (((type)1<<uchar_bitsize)-1)) == x.einzeln[sizeof(type)-1-j] )) \ { big_endian = FALSE; } \ } } \ if (big_endian && little_endian) \ { if (!(sizeof(type) == 1)) \ printf("#error \"Endianness of type %s in memory doesn't matter.\"\n",typestr); } \ if (big_endian && !little_endian) \ { printf("/* Type %s is stored BIG-ENDIAN in memory (i.e. like mc68000 or sparc). */\n",typestr); \ printf("#define "); printf_underscored(&typestr[9]); printf("_big_endian\n"); \ } \ if (little_endian && !big_endian) \ { printf("/* Type %s is stored LITTLE-ENDIAN in memory (i.e. like Z80 or VAX). */\n",typestr); \ printf("#define "); printf_underscored(&typestr[9]); printf("_little_endian\n"); \ } \ if (!big_endian && !little_endian) \ { printf("#error \"Type %s is stored in memory in an obscure manner!!\"\n",typestr); } \ } \ else \ { printf("#error \"Endianness makes no sense for type %s !!\"\n",typestr); } \ } get_endian(uchar,"unsigned char",uchar_bitsize); get_endian(ushort,"unsigned short",ushort_bitsize); get_endian(uint,"unsigned int",uint_bitsize); get_endian(ulong,"unsigned long",ulong_bitsize);#ifdef HAVE_LONGLONG
get_endian(ulonglong,"unsigned long long",ulonglong_bitsize);#endif
printf("\n");}
long get_stack_direction(void) { auto char dummy; static char* dummyaddr = (char*)0; if (!(dummyaddr == (char*)0)) { return (&dummy) - dummyaddr; } else { dummyaddr = &dummy; { long result = get_stack_direction(); /* The next assignment avoids tail recursion elimination (IRIX 6.4 CC). */ dummyaddr = (char*)0; return result; } } }
void main10(void) { long stack_direction = get_stack_direction(); if (stack_direction > 0) { printf("/* Stack grows up, ca. %ld bytes per function call. */\n",(long)stack_direction); printf("#define stack_grows_up\n"); } else if (stack_direction < 0) { printf("/* Stack grows down, ca. %ld bytes per function call. */\n",-(long)stack_direction); printf("#define stack_grows_down\n"); } else printf("#error \"Unknown stack model -- incorrect C semantics!!\"\n"); }
int main(){ main1(); main2(); main3(); main4(); main5(); main6(); main7(); main8(); main9(); main10(); if (ferror(stdout) || fclose(stdout)) return 1; return 0;}
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