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/* $Id: strcmp.c,v 1.1 2007/02/24 14:20:17 dmix Exp $ */
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void Check (int line, const char *s1, const char *s2, int expect)
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if ( strlen_P(s1) > sizeof(t1) - 1
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|| strlen_P(s2) > sizeof(t2) - 1)
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printf ("\nLine %d: expect: %d, result: %d\n",
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if (line > 255) line = 255;
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#define CHECK(s1, s2, expect) do { \
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Check (__LINE__, PSTR(s1), PSTR(s2), expect); \
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/* One or both strings are empty. */
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CHECK ("", "\001", -1);
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CHECK ("", "\377", -255);
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CHECK ("\001", "", 1);
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CHECK ("\377", "", 255);
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CHECK ("\001", "\001", 0);
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CHECK ("1234\377", "1234\377", 0);
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CHECK ("ABC", "ABC", 0);
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CHECK ("foo", "foo", 0);
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/* Args are not equal. */
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CHECK ("ABCDEF", "ABCDE", 'F');
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CHECK ("abcde", "abcdef", -'f');
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CHECK ("12345", "12245", 1);
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/* Case is important. */
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CHECK ("xyz", "xYz", 'y'-'Y');
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CHECK ("QUICK", "qUICK", 'Q'-'q');
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/* Chars are unsigned */
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CHECK ("\200", "\177", 1);
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CHECK ("\177", "\200", -1);
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CHECK ("\001", "\377", -254);
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CHECK ("\377", "\001", 254);