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/* $Id: snprintf_all.c,v 1.1.2.1 2008/03/20 21:42:31 joerg_wunsch Exp $ */
#ifndef __AVR__
# define PRINTFLN(line, fmt, ...) \
printf("\nLine %2d: " fmt "\n", line, ##__VA_ARGS__)
# define EXIT(code) exit ((code) < 255 ? (code) : 255)
# define sprintf_P sprintf
#else
# if defined(__AVR_ATmega128__)
/* ATmega128 has enough RAM for sprintf(), print to 0x2000 in XRAM. */
# define PRINTFLN(line, fmt, ...) \
sprintf ((char *)0x2000, "\nLine %d: " fmt "\n", line, ##__VA_ARGS__)
# else
/* small AVR */
# define PRINTFLN(args...)
# endif
# define EXIT exit
#endif
#define L_PRINTFLN(args...) PRINTFLN (__LINE__, args)
#define L_EXIT() EXIT (__LINE__)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "progmem.h"
#ifdef L_progmem
# define snprintf snprintf_P
# define PFMT(s) PSTR(s)
#else
# define PFMT(s) s
#endif
void Check (int line,
int expval, const char *expstr,
int retval, const char *retstr)
{
int code;
if (retval != expval)
code = line;
else if (strcmp_P (retstr, expstr))
code = 1000 + line;
else
return;
PRINTFLN (line, "expect: %3d, \"%s\",\n%8s output: %3d, \"%s\"\n",
strlen(expstr), expstr, " ", retval, retval > 0 ? retstr : "");
#ifdef DEBUG
code = (int)retstr;
#endif
EXIT (code);
}
#define FILLBUF 0x55 /* Before call of function to test
buf[] is filled with nonzero value. */
/* 'vp' is used to avoid gcc warnings about format string. */
#define CHECK(expval, expstr, buf, size, fmt, ...) do { \
int (* volatile vp)(char *, size_t, const char *, ...); \
vp = snprintf; \
memset (buf, FILLBUF, sizeof(buf)); \
Check (__LINE__, \
expval, PSTR(expstr), \
vp (buf, size, PFMT(fmt), ##__VA_ARGS__), \
buf); \
} while (0)
int main ()
{
int (* volatile vp)(char *, size_t, const char *, ...);
char s[260];
int i;
/* size == 0 */
vp = snprintf; /* to avoid compiler warning */
i = vp (s+10, 0, PFMT(""));
if (i) L_EXIT ();
/* bug #19280: snprintf(s,0,...) write to s[-1] */
memset (s, FILLBUF, sizeof(s));
i = snprintf (s+10, 0, PFMT("foo"));
if (i != 3) L_EXIT ();
for (i = 0; i != (int)sizeof(s); i++) {
if ((unsigned char)s[i] != FILLBUF)
L_EXIT ();
}
/* size == 1 */
s[0] = 1;
CHECK (0, "", s, 1, "");
CHECK (3, "", s, 1, "foo");
/* size == 2 */
CHECK (0, "", s, 2, "");
CHECK (1, ".", s, 2, ".");
CHECK (2, "a", s, 2, "aa");
CHECK (5, "1", s, 2, "%d", 12345);
/* big size */
CHECK (6, "-12345", s, sizeof(s), "%d", -12345);
CHECK (5, "54321", s, ~0u >> 1, "%u", 54321); /* 32767 */
CHECK (4, "abcd", s, ~(~0u >> 1), "%x", 0xabcd); /* 32768 */
CHECK (3, "123", s, ~0u, "%o", 0123); /* 65535 */
return 0;
}
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