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/* Test of scanf(): 'hh' type modifier
$Id: sscanf-hh.c,v 1.2.2.3 2008/03/20 21:42:34 joerg_wunsch Exp $ */
#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 {
signed char i[10];
} v = { {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)
#define PVEC(args...) ({ static char __x[] PROGMEM = {args}; __x; })
int main ()
{
/* Empty input. */
CHECK (-1, (*(char *)v.i == FILL), "", "%hhd", v.i);
CHECK (-1, (*(char *)v.i == FILL), "", " %hhd", v.i);
CHECK (-1, (*(char *)v.i == FILL), " ", " %hhd", v.i);
CHECK (-1, (*(char *)v.i == FILL), " ", " %hhd", v.i);
CHECK (-1, (*(char *)v.i == FILL), "\t\n\v\f\r", " %hhd", v.i);
/* Normal conversion. */
CHECK (1, (v.i[0] == 0 && v.i[1] == FILL), "0", "%hhd", v.i);
CHECK (
6,
!memcmp_P (v.i, PVEC (1, 127, -128, -2, -1, -1), 6),
"1 127 128 255 32767 -2",
"%hhd %hhd %hhd %hhd %hhd %hhd",
v.i + 0, v.i + 1, v.i + 2,
v.i + 5, v.i + 4, v.i + 3);
/* All possible conversion types. */
CHECK (
8,
!memcmp_P (v.i, PVEC (1, 2, 3, 4, 5, 6, 7, 14, 8), 9),
"1 2 3 4 5 6 7 8",
"%hhd %hhu %hhi %hho %hhx %hhX %hhp %hhn %hhd",
v.i + 0, v.i + 1, v.i + 2, v.i + 3,
v.i + 4, v.i + 5, v.i + 6, v.i + 7,
v.i + 8);
/* Width field. */
CHECK (1, v.i[0] == 12 && v.i[1] == FILL, "123", "%2hhd", v.i);
CHECK (1, v.i[0] == 98 && v.i[1] == FILL, "00000000009876", "%12hhd", v.i);
/* A few conversions. */
CHECK (2, !memcmp_P (v.i, PVEC (1,2), 2) && (v.i[2] == FILL),
"1 2", "%hhd%hhd", v.i, v.i + 1);
CHECK (2, !memcmp_P (v.i, PVEC (1,3), 2) && (v.i[2] == FILL),
"1+3", "%hhd%hhd", v.i, v.i + 1);
CHECK (2, !memcmp_P (v.i, PVEC (1,-1), 2) && (v.i[2] == FILL),
"1-1", "%hhd%hhd", v.i, v.i + 1);
/* Suppress a writing. */
CHECK (0, (*(char *)v.i == FILL), "123", "%*hhd", v.i);
CHECK (2, !memcmp_P (v.i, PVEC (1,3), 2) && (v.i[2] == FILL),
"1 2 3", "%hhd%*hhd%hhd", v.i, v.i + 1);
return 0;
}
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