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-rw-r--r--config/cmake/ConversionTests.c422
1 files changed, 422 insertions, 0 deletions
diff --git a/config/cmake/ConversionTests.c b/config/cmake/ConversionTests.c
new file mode 100644
index 0000000..0e24954
--- /dev/null
+++ b/config/cmake/ConversionTests.c
@@ -0,0 +1,422 @@
+#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
+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>
+
+
+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
generated by cgit v0.12 at 2024-11-06 17:21:49 (GMT)