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/* Test of scanf(): float conversion.
$Id: sscanf_flt-fnn.c,v 1.2.2.3 2008/03/20 21:42:36 joerg_wunsch Exp $ */
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "progmem.h"
#ifdef __AVR__
# define ASSERT(expr) \
do { \
if (!(expr)) exit(__LINE__); \
} while (0)
# define EXIT(v) exit (v)
# if defined(__AVR_ATmega128__)
/* ATmega128 has enough RAM for sprintf(), print to 0x2000 in XRAM. */
# define PRINTF(f...) sprintf((char *)0x2000, f)
# else
/* small AVR */
# define PRINTF(f...)
# endif
#else
# include <assert.h>
# define ASSERT(expr) assert (expr)
# define EXIT(v) exit ((v) < 256 ? (v) : 255)
# define PRINTF(f...) printf (f)
# define sscanf_P sscanf
# define memcmp_P memcmp
#endif
/* Next variables are useful to debug the AVR. */
int vrslt = 1;
struct {
float x[7];
char c[7];
} v = { {1.0}, {1} };
void Check (int line, int expval, int rslt)
{
vrslt = rslt;
if (rslt != expval) {
PRINTF ("\nLine %d: expect= %d, rslt= %d\n", line, expval, rslt);
EXIT (line);
}
}
/* The sscanf() is called 4 times: SRAM and FLASH format, 2 values
to fill before run. */
#define CHECK(expval, ass_expr, str, fmt, ...) \
do { \
PROGMEM static char fmt_p[] = fmt; \
char str_s[220]; \
char fmt_s[40]; \
char FILL; \
int i; \
int (* volatile vp)(const char *, const char *, ...); \
\
strcpy_P (str_s, PSTR(str)); \
strcpy_P (fmt_s, fmt_p); \
\
for (FILL = 0; FILL < 4; FILL++) { \
memset (&v, FILL, sizeof(v)); \
vp = (FILL & 1) ? sscanf_P : sscanf; \
i = vp (str_s, (FILL & 1) ? fmt_p : fmt_s, ##__VA_ARGS__); \
Check (__LINE__, expval, i); \
ASSERT (ass_expr); \
} \
} while (0)
int all_nans (const float v[], int n)
{
int i;
for (i = 0; i < n; i++) {
if (!isnan (v[i]))
return 0;
}
return 1;
}
int main ()
{
/* No valid digits. */
CHECK (0, 1, ". ", "%e", & v.x[0]);
CHECK (0, 1, "+ ", "%e", & v.x[0]);
CHECK (0, 1, "- ", "%e", & v.x[0]);
CHECK (0, 1, "E ", "%e", & v.x[0]);
CHECK (0, 1, "+-123", "%e", & v.x[0]);
CHECK (0, 1, "-+123", "%e", & v.x[0]);
CHECK (0, 1, ".-123", "%e", & v.x[0]);
CHECK (0, 1, ".+123", "%e", & v.x[0]);
CHECK (0, 1, "e12", "%e", & v.x[0]);
CHECK (0, 1, "- 1", "%e", & v.x[0]);
CHECK (0, 1, "IN ", "%e", & v.x[0]);
CHECK (0, 1, "NA ", "%e", & v.x[0]);
CHECK (0, 1, "infinit ", "%e", & v.x[0]);
/* NaN */
CHECK (
6,
all_nans (v.x, 6),
"nan NAN NaN -nan +NAN -nAn",
"%E %e %F %f %G %g",
& v.x[0], & v.x[1], & v.x[2], & v.x[3], & v.x[4], & v.x[5]);
/* Character after NaN. */
CHECK (
10,
all_nans (v.x, 6) && !memcmp_P (v.c, PSTR (".+eQ"), 4),
"nan. nan+ nane NANQ nannan",
"%e%c %e%c %e%c %e%c %e %e",
& v.x[0], & v.c[0], & v.x[1], & v.c[1], & v.x[2], & v.c[2],
& v.x[3], & v.c[3], & v.x[4], & v.x[5]);
/* Inf */
CHECK (
6,
!memcmp_P (
v.x,
({ static float __x[] PROGMEM = {
INFINITY, INFINITY, INFINITY,
INFINITY, -INFINITY, -INFINITY
};
__x;
}),
6 * sizeof(float)),
"INF inf +Inf INFINITY -infinity -InFiNiTy",
"%e %E %f %F %g %G",
& v.x[0], & v.x[1], & v.x[2], & v.x[3], & v.x[4], & v.x[5]);
/* Character after Inf. */
CHECK (
9,
!memcmp_P (
v.x,
({ static float __x[] PROGMEM = {
INFINITY, INFINITY, INFINITY,
INFINITY, INFINITY, -INFINITY
};
__x;
}),
6 * sizeof(float))
&& !memcmp_P (v.c, PSTR (" s\b"), 3),
"inf infinityinfinitys INF\b inf-inf",
"%e%c %e%e%c %e%c %e%e",
& v.x[0], & v.c[0],
& v.x[1],
& v.x[2], & v.c[1],
& v.x[3], & v.c[2],
& v.x[4],
& v.x[5]);
return 0;
}
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