initial commit

oscar64/autotest/strcmptest2.c

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+#include <string.h>
+#include <assert.h>
+
+char	aa[2000], ba[2000];
+
+int main(void)
+{
+	assert(strcmp("abcdefgh", "abcdefgh") == 0);
+	assert(strcmp("abcdefgh", "abcdemgh") < 0);
+	assert(strcmp("abcdefgh", "abcdefghi") < 0);
+	assert(strcmp("abcdefghi", "abcdefgh") > 0);
+	assert(strcmp("abcdemgh", "abcdefgh") > 0);
+
+	for(int i=0; i<1900; i++)
+	{
+		aa[i] = 'a' + (i & 7);
+	}
+	aa[1900] = 0;
+	
+	strcpy(ba, aa);
+	
+	assert(strcmp(aa, ba) == 0);
+	ba[1000] = 'z';
+	assert(strcmp(aa, ba) < 0);
+	assert(strcmp(ba, aa) > 0);
+	
+	// Test strncmp with basic comparisons
+	assert(strncmp("abcdefgh", "abcdefgh", 8) == 0);
+	assert(strncmp("abcdefgh", "abcdemgh", 8) < 0);
+	assert(strncmp("abcdefgh", "abcdefghi", 8) == 0);  // only compare first 8 chars
+	assert(strncmp("abcdefghi", "abcdefgh", 9) > 0);
+	assert(strncmp("abcdemgh", "abcdefgh", 8) > 0);
+	
+	// Test strncmp with partial comparisons
+	assert(strncmp("abcdefgh", "abcdemgh", 4) == 0);  // first 4 chars are same
+	assert(strncmp("abcdefgh", "abcdemgh", 6) < 0);   // difference at 5th char
+	assert(strncmp("hello", "help", 3) == 0);         // "hel" vs "hel"
+	assert(strncmp("hello", "help", 4) < 0);          // "hell" vs "help"
+	
+	// Test strncmp with zero length
+	assert(strncmp("different", "strings", 0) == 0);  // zero length always equal
+	assert(strncmp("", "", 0) == 0);
+	assert(strncmp("a", "b", 0) == 0);
+	
+	// Test strncmp with empty strings
+	assert(strncmp("", "", 5) == 0);
+	assert(strncmp("hello", "", 5) > 0);
+	assert(strncmp("", "hello", 5) < 0);
+	assert(strncmp("hello", "", 1) > 0);
+	assert(strncmp("", "hello", 1) < 0);
+	
+	// Test strncmp with single characters
+	assert(strncmp("a", "a", 1) == 0);
+	assert(strncmp("a", "b", 1) < 0);
+	assert(strncmp("b", "a", 1) > 0);
+	
+	// Test strncmp where one string is shorter
+	assert(strncmp("abc", "abcdef", 3) == 0);
+	assert(strncmp("abc", "abcdef", 6) < 0);  // null vs 'd'
+	assert(strncmp("abcdef", "abc", 6) > 0);  // 'd' vs null
+	
+	// Test strncmp with long strings
+	strcpy(ba, aa);  // restore ba to match aa
+	assert(strncmp(aa, ba, 1900) == 0);
+	ba[1000] = 'z';
+	assert(strncmp(aa, ba, 1000) == 0);   // equal up to position 1000
+	assert(strncmp(aa, ba, 1001) < 0);    // difference at position 1000
+	assert(strncmp(ba, aa, 1001) > 0);    // difference at position 1000
+	assert(strncmp(aa, ba, 999) == 0);    // equal before the difference
+	
+	// Test strncmp with length larger than string length
+	strcpy(ba, "short");
+	assert(strncmp("short", ba, 100) == 0);  // equal even with large n
+	assert(strncmp("short", "shorx", 100) < 0);  // difference within string
+	
+	return 0;
+}