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/* $Id: memmem.c,v 1.1.2.1 2008/03/20 21:42:38 joerg_wunsch Exp $ */
#ifndef __AVR__
# define _GNU_SOURCE /* to include memmem() */
# 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 void *s1, size_t n1, const char *s2, size_t n2, int expect)
{
char t1[300];
char t2[100];
char *p;
if (n1 > sizeof(t1) || n2 > sizeof(t2))
exit (1);
memcpy_P (t1, s1, n1);
memcpy_P (t2, s2, n2);
p = memmem (t1, n1, t2, n2);
if (expect < 0) {
if (p) {
PRINTFLN (line, "return nonzero");
EXIT (line);
}
} else {
if (p != t1 + expect) {
PRINTFLN (line, "expect= %d result= %d", expect, p - t1);
EXIT (1000 + line);
}
}
if (memcmp_P (t1, s1, n1) || memcmp_P (t2, s2, n2)) {
PRINTFLN (line, "string(s) is changed");
EXIT (2000 + line);
}
}
#define CHECK(s1, n1, s2, n2, expect) do { \
Check (__LINE__, PSTR(s1), n1, PSTR(s2), n2, expect); \
} while (0)
/* Very long s2[]. Separate function: we are restricted in stack usage. */
void Check_2 (void)
{
char s1[8];
char s2[260];
memset (s1, '.', sizeof(s1));
memset (s2, '.', sizeof(s2));
if (memmem (s1, sizeof(s1), s2, sizeof(s2)))
EXIT (__LINE__);
}
int main ()
{
/* Empty 'needle'. */
CHECK ("", 0, "", 0, 0);
CHECK ("12345", 5, "1", 0, 0);
/* 'needle' of 1 byte long */
CHECK ("", 0, "a", 1, -1);
CHECK ("b", 1, "a", 1, -1);
CHECK ("a", 1, "a", 1, 0);
CHECK ("abcbef", 6, "a", 1, 0);
CHECK (".a", 2, "a", 1, 1);
CHECK (".a.", 3, "a", 1, 1);
CHECK ("ABCDEFGH", 8, "H", 1, 7);
CHECK ("", 0, "\000", 1, -1);
CHECK ("", 1, "\000", 1, 0);
CHECK (".", 2, "\000", 1, 1);
CHECK ("\000\001", 2, "\001", 1, 1);
/* 'needle' of 2 bytes long */
CHECK ("", 0, "12", 2, -1);
CHECK ("1", 1, "12", 2, -1);
CHECK ("13", 2, "12", 2, -1);
CHECK ("32", 2, "12", 2, -1);
CHECK ("12", 2, "12", 2, 0);
CHECK ("123", 3, "12", 2, 0);
CHECK ("012", 3, "12", 2, 1);
CHECK ("01200", 5, "12", 2, 1);
CHECK ("\000", 1, "\000\000", 2, -1);
CHECK ("\000\000", 2, "\000\000", 2, 0);
/* partially mathing */
CHECK ("a_ab_abc_abcd_abcde", 19, "abcdef", 6, -1);
CHECK ("a_ab_abc_abcd_abcde_abcdef", 26, "abcdef", 6, 20);
CHECK ("aababcabcdabcde", 15, "abcdef", 6, -1);
CHECK ("aababcabcdabcdeabcdef", 21, "abcdef", 6, 15);
/* repeated chars */
CHECK ("abaabaaabaaaab", 14, "aaaaab", 6, -1);
CHECK ("abaabaaabaaaabaaaaab", 20, "aaaaab", 6, 14);
/* A first match is returned. */
CHECK ("_foo_foo", 8, "foo", 3, 1);
/* Case is not ignored. */
CHECK ("A", 1, "a", 1, -1);
CHECK (".z", 2, ".Z", 2, -1);
/* Very long s1 */
CHECK ("................................................................"
"................................................................"
"................................................................"
"...............................................................*",
256, "*", 1, 255);
CHECK ("................................................................"
"................................................................"
"................................................................"
"................................................................"
"*", 257, "*", 1, 256);
CHECK ("................................................................"
"................................................................"
"................................................................"
"................................................................"
".*.", 258, "*", 1, 257);
CHECK ("................................................................"
"................................................................"
"................................................................"
"................................................................"
"...*..", 260, ".*", 2, 258);
Check_2 ();
return 0;
}
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