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/* Test of scanf(): float conversion, width field.
$Id: sscanf_flt-fw.c,v 1.1.2.3 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[8];
char s[8];
} 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[50]; \
char FILL; \
int i; \
int (* volatile vp)(const char *, const char *, ...); \
\
ASSERT (sizeof(str_s) >= sizeof(str)); \
ASSERT (sizeof(fmt_s) >= sizeof(fmt_p)); \
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 main ()
{
/* 1 character. */
#ifdef __AVR__
/* ???: Glibc gets 2 characters and places 1.0 into v.x */
CHECK (1, v.x[0] == 0, "01", "%1e", v.x);
#endif
CHECK (1, v.x[0] == 1, "1", "%1e", v.x);
CHECK (
2,
v.x[0] == 2 && v.x[1] == 9,
"298", "%1f%1g", v.x, v.x + 1);
/* Space before number. */
CHECK (1, v.x[0] == 12, " 1234.5", "%2e", v.x);
/* All possible symbols of float number. */
CHECK (
16,
!memcmp_P (
v.x,
({ static float __x[8] PROGMEM = {
12, -45, 0.5, 10, .25, 1e1, 2e2, .125
}; __x; }),
8 * sizeof(float))
&& !memcmp_P (v.s, PSTR("36759093"), 8),
"+123 -456 0.57 10.5 .259 1e10 2e+29 125.e-33",
"%3e%c %3e%c %3e%c %3e%c %3e%c %3e%c %4e%c %7e%c",
v.x + 0, v.s + 0, v.x + 1, v.s + 1,
v.x + 2, v.s + 2, v.x + 3, v.s + 3,
v.x + 4, v.s + 4, v.x + 5, v.s + 5,
v.x + 6, v.s + 6, v.x + 7, v.s + 7);
/* Suppress and width. */
CHECK (0, (*(char *)v.x == FILL), "9", "%*1e", v.x);
CHECK (1, v.x[0] == 76, "9876", "%*2e%2e", v.x);
return 0;
}
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