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/* $Id: strcasestr.c,v 1.1.2.1 2008/03/20 21:42:39 joerg_wunsch Exp $ */
#ifndef __AVR__
# define _GNU_SOURCE /* to include strcasestr() */
# define PRINTFLN(line, fmt, ...) \
printf("\nLine %d: " fmt "\n", line, ##__VA_ARGS__)
# define EXIT(code) exit ((code) < 255 ? (code) : 255)
#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 <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "progmem.h"
void Check (int line, const char *s1, const char *s2, int expect)
{
char t1[300];
char t2[100];
char *p;
if ((strlen_P(s1) > sizeof(t1) - 1) || (strlen_P(s2) > sizeof(t2) - 1))
exit (1);
strcpy_P (t1, s1);
strcpy_P (t2, s2);
p = strcasestr (t1, t2);
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 (strcmp_P (t1, s1) || strcmp_P (t2, s2)) {
PRINTFLN (line, "string(s) is changed");
EXIT (2000 + line);
}
}
#define CHECK(s1, s2, expect) do { \
Check (__LINE__, PSTR(s1), PSTR(s2), expect); \
} while (0)
int main ()
{
int c1, c2;
char s1[4];
char s2[4];
/* Empty 'needle'. */
CHECK ("", "", 0);
CHECK ("12345", "", 0);
/* bug #19135 */
CHECK ("ababac", "abac", 2);
/* 'needle' of 1 byte long */
CHECK ("", "a", -1);
CHECK ("b", "a", -1);
CHECK ("a", "a", 0);
CHECK ("abcbef", "a", 0);
CHECK (".a", "a", 1);
CHECK (".a.", "a", 1);
CHECK ("ABCDEFGH", "H", 7);
/* 'needle' of 2 bytes long */
CHECK ("", "12", -1);
CHECK ("13", "12", -1);
CHECK ("32", "12", -1);
CHECK ("12", "12", 0);
CHECK ("123", "12", 0);
CHECK ("012", "12", 1);
CHECK ("01200", "12", 1);
/* partially mathing */
CHECK ("a_ab_abc_abcd_abcde", "abcdef", -1);
CHECK ("a_ab_abc_abcd_abcde_abcdef", "abcdef", 20);
CHECK ("aababcabcdabcde", "abcdef", -1);
CHECK ("aababcabcdabcdeabcdef", "abcdef", 15);
/* repeated chars */
CHECK ("abaabaaabaaaab", "aaaaab", -1);
CHECK ("abaabaaabaaaabaaaaab", "aaaaab", 14);
/* A first match is returned. */
CHECK ("_foo_foo", "foo", 1);
/* Case is ignored. */
CHECK ("A", "a", 0);
CHECK ("qwertyuiopasdfghjklzxcvbnm",
"QWERTYUIOPASDFGHJKLZXCVBNM",
0);
CHECK (" QWERTYUIOPASDFGHJKLZXCVBNM",
"qwertyuiopasdfghjklzxcvbnm",
1);
CHECK (" The Quick Brown Fox ", "thE quicK browN foX", 2);
/* Case is ignored for alphas only. */
CHECK ("", "\040", -1);
CHECK ("\100", "\140", -1); /* first */
CHECK ("\140", "\100", -1);
CHECK ("\133", "\173", -1);
CHECK ("\173", "\133", -1);
CHECK (".\100", ".\140", -1); /* second */
CHECK (".\140", ".\100", -1);
CHECK (".\133", ".\173", -1);
CHECK (".\173", ".\133", -1);
CHECK ("\100\140", "\140", 1); /* second match */
/* Very long s1 */
CHECK ("................................................................"
"................................................................"
"................................................................"
"...............................................................A",
"a", 255);
CHECK ("................................................................"
"................................................................"
"................................................................"
"................................................................"
"a", "A", 256);
CHECK ("................................................................"
"................................................................"
"................................................................"
"................................................................"
".a", "A", 257);
CHECK ("................................................................"
"................................................................"
"................................................................"
"................................................................"
".a", "..A", 255);
/* Let us check a set of possible combinations of 2 symbols. */
for (c1 = 1; c1 < 256; c1++) {
for (c2 = 1; c2 < 256; c2++) {
if (c1 == c2
|| (isalpha(c1) && isalpha(c2) && ((c1 ^ c2) == ('A' ^ 'a'))))
{
/* first char: ("c","c") */
s1[0] = c1; s1[1] = 0;
s2[0] = c2; s2[1] = 0;
if (strcasestr (s1, s2) != s1)
EXIT (__LINE__);
/* second char: (".c", ".c") */
s1[0] = '.'; s1[1] = c1; s1[2] = 0;
s2[0] = '.'; s2[1] = c2; s2[2] = 0;
if (strcasestr (s1, s2) != s1)
EXIT (__LINE__);
/* substring is shifted: ("..c", ".c") */
s1[0] = '.'; s1[1] = '.'; s1[2] = c1; s1[3] = 0;
s2[0] = '.'; s2[1] = c2; s2[2] = 0;
if (strcasestr (s1, s2) != s1 + (c2 != '.'))
EXIT (__LINE__);
} else {
/* first char: ("c","c") */
s1[0] = c1; s1[1] = 0;
s2[0] = c2; s2[1] = 0;
if (strcasestr (s1, s2) != 0)
#ifdef DEBUG
EXIT (c1 | c2<<8);
#else
EXIT (__LINE__);
#endif
/* second char: (".c", ".c") */
s1[0] = '.'; s1[1] = c1; s1[2] = 0;
s2[0] = '.'; s2[1] = c2; s2[2] = 0;
if (strcasestr (s1, s2) != 0)
EXIT (__LINE__);
}
}
}
return 0;
}
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