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/* Test of strtod() function. big/small values.
$Id: strtod-3.c,v 1.1.2.1 2008/02/23 10:21:11 dmix Exp $
*/
#include <errno.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "progmem.h"
union lofl_u {
long lo;
float fl;
};
volatile union lofl_u v = { .lo = 1 };
PROGMEM const struct { /* Table of test cases. */
char s[20];
unsigned char len;
union lofl_u val;
int eno;
} t[] = {
{ "1.4012985e-45", 13, { 0x00000001 }, 0 },
{ "1.401298e-45", 12, { 0x00000001 }, 0 },
{ "1.40130e-45", 11, { 0x00000001 }, 0 },
{ "1.4013e-45", 10, { 0x00000001 }, 0 },
{ "1.401e-45", 9, { 0x00000001 }, 0 },
{ "1.40e-45", 8, { 0x00000001 }, 0 },
{ "1.4e-45", 7, { 0x00000001 }, 0 },
{ "1e-45", 5, { 0x00000001 }, 0 },
{ "3e-45", 5, { 0x00000002 }, 0 },
#ifndef __AVR__ /* strtod() is't absolutely accurate today */
{ "3.4028235e+38", 13, { 0x7f7fffff }, 0 },
#endif
{ "3.4028229e+38", 13, { 0x7f7ffffc }, 0 },
/* Near acc overflow. */
{ "4294967200", 10, { .fl = 4294967200 }, 0 },
{ "4294967270", 10, { .fl = 4294967300 }, 0 },
{ "4294967279", 10, { .fl = 4294967300 }, 0 },
{ "4294967280", 10, { .fl = 4294967300 }, 0 },
{ "4294967289", 10, { .fl = 4294967300 }, 0 },
{ "4294967290", 10, { .fl = 4294967300 }, 0 },
{ "4294967295", 10, { .fl = 4294967300 }, 0 }, /* 0xffffffff */
{ "4294967296", 10, { .fl = 4294967300 }, 0 },
{ "4294967400", 10, { .fl = 4294967400 }, 0 },
};
void x_exit (int index)
{
#ifndef __AVR__
fprintf (stderr, "t[%d]: %#lx\n", index - 1, v.lo);
#endif
exit (index ? index : -1);
}
int main ()
{
char s [sizeof(t[0].s)];
char *p;
union lofl_u mst;
unsigned char len;
int eno;
int i;
for (i = 0; i < (int) (sizeof(t) / sizeof(t[0])); i++) {
strcpy_P (s, t[i].s);
len = pgm_read_byte (& t[i].len);
mst.lo = pgm_read_dword (& t[i].val);
eno = pgm_read_word (& t[i].eno);
errno = 0;
p = 0;
v.fl = strtod (s, &p);
if (!p || (p - s) != len || errno != eno)
x_exit (i+1);
if (isnan(mst.fl) && isnan(v.fl))
continue;
if (v.lo != mst.lo)
x_exit (i+1);
}
return 0;
}
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