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/* $Id: memrchr.c,v 1.1.2.1 2008/03/20 21:42:39 joerg_wunsch Exp $ */
#ifndef __AVR__
# define _GNU_SOURCE /* to include memrchr() */
# define PRINTFLN(line, fmt, ...) \
printf("\nLine %d: " fmt "\n", line, ##__VA_ARGS__)
# define EXIT(code) exit ((code) < 255 ? (code) : 255)
# define memcmp_P memcmp
#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
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "progmem.h"
void Check (int line, const char *s, int c, size_t len, int expect)
{
char t[320];
char *p;
if (len > sizeof(t))
exit (1);
memcpy_P (t, s, len);
p = memrchr (t, c, len);
if (expect < 0) {
if (p) {
PRINTFLN (line, "non zero pointer is returned");
EXIT (line);
}
} else {
if (p != t + expect) {
PRINTFLN (line, "expect= %d result= %d", expect, p - t);
EXIT (line + 1000);
}
}
if (memcmp_P (t, s, len)) {
PRINTFLN (line, "string is changed");
EXIT (line + 2000);
}
}
#define CHECK(s, c, len, expect) do { \
Check (__LINE__, PSTR(s), c, len, expect); \
} while (0)
int main ()
{
/* Not found */
CHECK ("", 0, 0, -1);
CHECK ("", 255, 0, -1);
CHECK ("ABCDEF", 'a', 6, -1);
/* Found */
CHECK ("\000", 0, 1, 0);
CHECK ("\001", 1, 1, 0);
CHECK ("\377", 255, 1, 0);
CHECK ("987654321", '7', 9, 2);
/* '\0' has't a special sense */
CHECK ("12345", 0, 6, 5);
CHECK (".\000.", 0, 3, 1);
CHECK ("\000a\000b", 'b', 4, 3);
/* Last occurance */
CHECK ("abcdabcd", 'b', 8, 5);
CHECK ("........", '.', 8, 7);
/* 'c' converted to a char */
CHECK ("ABCDEF", 'A'+0x100, 6, 0);
CHECK ("ABCDE\377", ~0, 6, 5);
/* Very long string */
CHECK ("................................................................"
"................................................................"
"................................................................"
"...............................................................*"
"................................................................",
'*', 320, 255);
CHECK ("................................................................"
"................................................................"
"................................................................"
"................................................................"
"*...............................................................",
'*', 320, 256);
CHECK ("................................................................"
"................................................................"
"................................................................"
"................................................................"
".*..............................................................",
'*', 320, 257);
return 0;
}
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