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hdf5/config/cmake/ConversionTests.c

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#ifdef H5_FP_TO_INTEGER_OVERFLOW_WORKS_TEST
int main(void)
{
float f = 2147483648.0f;
int i;
i = (int)f;
done:
exit(0);
}
#endif
#ifdef H5_FP_TO_ULLONG_ACCURATE_TEST
int main(void)
{
float f = 111.60f;
double d = 222.55L;
unsigned long long l1 = (unsigned long long)f;
unsigned long long l2 = (unsigned long long)d;
int ret = 0;
if(l1 == 112)
ret = 1;
if(l2 == 223)
ret = 1;
done:
exit(ret);
}
#endif
#ifdef H5_FP_TO_ULLONG_RIGHT_MAXIMUM_TEST
int main(void)
{
float f = 9701917572145405952.00f;
double d1 = 9701917572145405952.00L;
long double d2 = 9701917572145405952.00L;
double d3 = 2e40L;
unsigned long long l1 = (unsigned long long)f;
unsigned long long l2 = (unsigned long long)d1;
unsigned long long l3 = (unsigned long long)d2;
unsigned long long l4;
unsigned long long l5 = 0x7fffffffffffffffULL;
int ret = 0;
if(l1 <= l5 || l2 <= l5 || l3 <= l5)
ret = 1;
l4 = (unsigned long long)d3;
if(l4 <= l5)
ret = 1;
done:
exit(ret);
}
#endif
#ifdef H5_LDOUBLE_TO_INTEGER_WORKS_TEST
#include <stdlib.h>
#include <string.h>
int main(void)
{
void *align;
long double ld= 9701917572145405952.00L;
unsigned char v1;
short v2;
unsigned int v3;
int ret = 0;
align = (void*)malloc(sizeof(long double));
memcpy(align, &ld, sizeof(long double));
/*For HU-UX11.00, there's floating exception(core dump) when doing some of casting
*from 'long double' to integers*/
v1=(unsigned char)(*((long double*)align));
v2=(short)(*((long double*)align));
v3=(unsigned int)(*((long double*)align));
done:
exit(ret);
}
#endif
#ifdef H5_LDOUBLE_TO_LLONG_ACCURATE_TEST
int main(void)
{
long double ld = 20041683600089727.779961L;
long long ll;
unsigned long long ull;
unsigned char s[16];
int ret = 0;
if(sizeof(long double) == 16) {
/*make sure the long double type is the same as the failing type
*which has 16 bytes in size and 11 bits of exponent. If it is,
*the bit sequence should be like below. It's not
*a decent way to check but this info isn't available. */
memcpy(s, &ld, 16);
if(s[0]==0x43 && s[1]==0x51 && s[2]==0xcc && s[3]==0xf3 &&
s[4]==0x85 && s[5]==0xeb && s[6]==0xc8 && s[7]==0xa0 &&
s[8]==0xbf && s[9]==0xcc && s[10]==0x2a && s[11]==0x3c) {
/*slightly adjust the bit sequence (s[8]=0xdf). The converted
*values will go wild on Mac OS 10.4 and IRIX64 6.5.*/
s[0]=0x43; s[1]=0x51; s[2]=0xcc; s[3]=0xf3;
s[4]=0x85; s[5]=0xeb; s[6]=0xc8; s[7]=0xa0;
s[8]=0xdf; s[9]=0xcc; s[10]=0x2a; s[11]=0x3c;
s[12]=0x3d; s[13]=0x85; s[14]=0x56; s[15]=0x20;
memcpy(&ld, s, 16);
ll = (long long)ld;
ull = (unsigned long long)ld;
if(ll != 20041683600089728 || ull != 20041683600089728)
ret = 1;
}
}
done:
exit(ret);
}
#endif
#ifdef H5_LDOUBLE_TO_UINT_ACCURATE_TEST
int main(void)
{
long double ld = 2733248032.9183987530L;
unsigned int i;
int ret = 0;
i = (unsigned int)ld;
if(i!=2733248032 && i!=2733248031 && i!=2733248033)
ret = 1;
done:
exit(ret);
}
#endif
#ifdef H5_LLONG_TO_LDOUBLE_CORRECT_TEST
int main(void)
{
long double ld;
long long ll;
unsigned long long ull;
unsigned char s[16];
int flag=0, ret=0;
/*Determine if long double has 16 byte in size, 11 bit exponent, and
*the bias is 0x3ff */
if(sizeof(long double) == 16) {
ld = 1.0L;
memcpy(s, &ld, 16);
if(s[0]==0x3f && s[1]==0xf0 && s[2]==0x00 && s[3]==0x00 &&
s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00)
flag = 1;
}
if(flag==1 && sizeof(long long)==8) {
ll = 0x01ffffffffffffffLL;
ld = (long double)ll;
memcpy(s, &ld, 16);
/*Check if the bit sequence is as supposed to be*/
if(s[0]!=0x43 || s[1]!=0x7f || s[2]!=0xff || s[3]!=0xff ||
s[4]!=0xff || s[5]!=0xff || s[6]!=0xff || s[7]!=0xff ||
s[8]!=0xf0 || s[9]!=0x00 || s[10]!=0x00 || s[11]!=0x00)
ret = 1;
}
if(flag==1 && sizeof(unsigned long long)==8) {
ull = 0x01ffffffffffffffULL;
ld = (long double)ull;
memcpy(s, &ld, 16);
if(s[0]!=0x43 || s[1]!=0x7f || s[2]!=0xff || s[3]!=0xff ||
s[4]!=0xff || s[5]!=0xff || s[6]!=0xff || s[7]!=0xff ||
s[8]!=0xf0 || s[9]!=0x00 || s[10]!=0x00 || s[11]!=0x00)
ret = 1;
}
done:
exit(ret);
}
#endif
#ifdef H5_NO_ALIGNMENT_RESTRICTIONS_TEST
#include <stdlib.h>
#include <string.h>
typedef struct {
size_t len;
void *p;
} hvl_t;
#ifdef FC_DUMMY_MAIN
#ifndef FC_DUMMY_MAIN_EQ_F77
# ifdef __cplusplus
extern "C"
# endif
int FC_DUMMY_MAIN()
{ return 1;}
#endif
#endif
int
main ()
{
char *chp = "beefs";
char **chpp = malloc (2 * sizeof (char *));
char **chpp2;
hvl_t vl = { 12345, (void *) chp };
hvl_t *vlp;
hvl_t *vlp2;
memcpy ((void *) ((char *) chpp + 1), &chp, sizeof (char *));
chpp2 = (char **) ((char *) chpp + 1);
if (strcmp (*chpp2, chp)) {
free (chpp);
return 1;
}
free (chpp);
vlp = malloc (2 * sizeof (hvl_t));
memcpy ((void *) ((char *) vlp + 1), &vl, sizeof (hvl_t));
vlp2 = (hvl_t *) ((char *) vlp + 1);
if (vlp2->len != vl.len || vlp2->p != vl.p) {
free (vlp);
return 1;
}
free (vlp);
;
return 0;
}
#endif
#ifdef H5_ULLONG_TO_LDOUBLE_PRECISION_TEST
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
int main(void)
{
/* General variables */
int endian;
int tst_value = 1;
int ret = 0;
/* For FreeBSD */
unsigned long long l = 0xa601e80bda85fcefULL;
long double ld;
unsigned char *c1, *c2;
size_t size;
/* For Cygwin */
unsigned long long l_cyg = 0xfffffffffffffff0ULL;
long double ld_cyg;
unsigned char *c2_cyg;
size_t size_cyg;
/* Determine this system's endianess */
c1 = (unsigned char*)calloc(1, sizeof(int));
memcpy((void*)c1, &tst_value, sizeof(int));
if(c1[0]==1)
endian = 0; /* little endian */
else
endian = 1; /* big endian */
/* For FreeBSD */
size = sizeof(long double);
memset(&ld, 0, size);
ld = (long double)l;
c2 = (unsigned char*)calloc(1, size);
memcpy((void*)c2, &ld, size);
/* Test if the last 2 bytes of mantissa are lost. Mainly for FreeBSD on Intel
* architecture(sleipnir) where it happens. */
/*if(endian==0 && c2[0]==0 && c2[1]==0)*/ /*little endian*/
if(endian==0 && c2[0]==0) { /*little endian*/
ret = 1;
goto done;
}
/* For Cygwin */
size_cyg = sizeof(long double);
memset(&ld_cyg, 0, size);
ld_cyg = (long double)l_cyg;
c2_cyg = (unsigned char*)calloc(1, size_cyg);
memcpy((void*)c2_cyg, &ld_cyg, size_cyg);
/* Test if the last 4 bytes(roughly) of mantissa are rounded up. Mainly for Cygwin
* where the values like 0xffffffffffffffff, 0xfffffffffffffffe, ...,
* 0xfffffffffffff000 ... are rounded up as 0x0000403f8000000000000000
* instead of 0x0000403effffffffffffffff, 0x0000403efffffffffffffffe, ...,
* 0x0000403efffffffffffff000 ...
*/
if(endian==0 && c2_cyg[0]==0 && c2_cyg[1]==0 && c2_cyg[2]==0 && c2_cyg[3]==0)
ret = 1;
done:
if(c1)
free(c1);
if(c2)
free(c2);
if(c2_cyg)
free(c2_cyg);
exit(ret);
}
#endif
#ifdef H5_ULONG_TO_FLOAT_ACCURATE_TEST
int main(void)
{
int ret = 0;
unsigned long l1;
unsigned long l2;
unsigned long l3;
float f1;
float f2;
float f3;
if(sizeof(unsigned long)==8) {
l1 = 0xffffffffffffffffUL;
l2 = 0xffffffffffff0000UL;
l3 = 0xf000000000000000UL;
f1 = (float)l1;
f2 = (float)l2;
f3 = (float)l3;
if((f1 < 0) || (f2 < 0) || (f3 < 0))
ret = 1;
}
done:
exit(ret);
}
#endif
#ifdef H5_ULONG_TO_FP_BOTTOM_BIT_ACCURATE_TEST
#include <string.h>
int main(void)
{
unsigned long l1;
unsigned long l2;
unsigned long l3;
unsigned long l4;
unsigned long long ld1;
unsigned long long ld2;
unsigned long long ld3;
unsigned long long ld4;
double d1, d2, d3, d4;
unsigned char s[8];
int ret = 0;
if(sizeof(unsigned long)==8) {
l1 = 0xf000000000000b00UL; /*Round-down case*/
l2 = 0xf000000000000401UL; /*Round-up case*/
l3 = 0xf000000000000400UL; /*Round-down case*/
l4 = 0xf000000000000c00UL; /*Round-up case*/
d1 = (double)l1;
d2 = (double)l2;
d3 = (double)l3;
d4 = (double)l4;
} else if(sizeof(unsigned long long)==8) {
ld1 = 0xf000000000000b00ULL; /*Round-down case*/
ld2 = 0xf000000000000401ULL; /*Round-up case*/
ld3 = 0xf000000000000400ULL; /*Round-down case*/
ld4 = 0xf000000000000c00ULL; /*Round-up case*/
d1 = (double)ld1;
d2 = (double)ld2;
d3 = (double)ld3;
d4 = (double)ld4;
} else {
ret = 1;
goto done;
}
memcpy(s, &d1, 8);
if(s[7]!=1)
ret = 1;
memcpy(s, &d2, 8);
if(s[7]!=1)
ret = 1;
memcpy(s, &d3, 8);
if(s[7]!=0)
ret = 1;
memcpy(s, &d4, 8);
if(s[7]!=2)
ret = 1;
done:
exit(ret);
}
}
#endif
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