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/* Test of scanf(): NUL symbol (input file).
$Id: scanf-nul.c,v 1.1.2.3 2008/03/20 21:42:32 joerg_wunsch Exp $ */
#define _GNU_SOURCE
#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
# define ssize_t int
#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
# define _FDEV_EOF (-1)
#endif
/* Next variables are useful to debug the AVR. */
int vrslt = 1;
struct {
int i;
int j;
char s[8];
char t[8];
} v = { 1, 1, {1}, {1} };
const char *getpnt, *getend;
int ugetc (FILE *fp)
{
(void)fp;
if (getpnt == getend)
return _FDEV_EOF;
return pgm_read_byte (getpnt++);
}
ssize_t uread (void *cookie, char *buf, size_t size)
{
size_t n;
for (n = 0; n < size; n++) {
int i = ugetc (cookie);
if (i < 0) break;
*buf++ = i;
}
return n;
}
int uclose (void *cookie)
{
(void)cookie;
return 0;
}
static FILE * uopen (const char *buf, int size)
{
static FILE *fp;
if (fp) fclose (fp);
#ifdef __AVR__
fp = fdevopen (0, ugetc);
#else
{
cookie_io_functions_t iofuns;
memset (& iofuns, 0, sizeof(iofuns));
iofuns.read = uread;
iofuns.close = uclose;
fp = fopencookie (NULL, "rb", iofuns);
}
#endif
ASSERT (fp);
getpnt = buf;
getend = buf + size;
return fp;
}
int main ()
{
FILE *fp;
int i;
/* %c */
memset (&v, ~0, sizeof(v));
fp = uopen (PSTR ("A\000B"), 3);
vrslt = fscanf (fp, "%c%c%c", v.s, v.s + 1, v.s + 2);
ASSERT (vrslt == 3);
ASSERT (!memcmp_P (v.s, PSTR("A\000B"), 3));
/* '\0' is not a space. */
memset (&v, ~0, sizeof(v));
fp = uopen (PSTR ("\t \000"), 3);
i = fscanf (fp, " %c", v.s);
ASSERT (i == 1);
ASSERT (!v.s[0]);
/* %d */
memset (&v, ~0, sizeof(v));
fp = uopen (PSTR ("123\000456"), 7);
i = fscanf (fp, "%d%c%d", & v.i, v.s, & v.j);
ASSERT (i == 3);
ASSERT (v.i == 123 && !v.s[0] && v.j == 456);
/* %s */
memset (&v, ~0, sizeof(v));
fp = uopen (PSTR ("A\000BC"), 4);
i = fscanf (fp, "%s%s", v.s, v.t);
ASSERT (i == 1);
ASSERT (!memcmp_P (v.s, PSTR("A\000BC"), 4));
return 0;
}
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