strlcat/main.c

#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include "strlcat.h"

int main () {
    // Test argument checking
    assert(0 == strlcpy(NULL, "", 10));
    assert(0 == strlcpy("", NULL, 10));
    assert(0 == strlcpy(NULL, NULL, 10));
    
    assert(0 == strlncpy(NULL, "", 10, 10));
    assert(0 == strlncpy("", NULL, 10, 10));
    assert(0 == strlncpy(NULL, NULL, 10, 10));
    
    assert(0 == strlcat(NULL, "", 10));
    assert(0 == strlcat("", NULL, 10));
    assert(0 == strlcat(NULL, NULL, 10));
    
    assert(0 == strlncat(NULL, "", 10, 10));
    assert(0 == strlncat("", NULL, 10, 10));
    assert(0 == strlncat(NULL, NULL, 10, 10));

    
    // strlcpy
    {
        char buf[5] = {0,1,2,3,4};    
        assert(9 == strlcpy(buf, "abcdefgh", 4));
        assert(buf[0] == 'a');
        assert(buf[1] == 'b');
        assert(buf[2] == 'c');
        assert(buf[3] == 0);
        assert(buf[4] == 4);
    }
    {
        char buf[5] = {0,1,2,3,4};    
        assert(3 == strlcpy(buf, "ab", 5));
        assert(buf[0] == 'a');
        assert(buf[1] == 'b');
        assert(buf[2] == 0);
        assert(buf[3] == 3);
    }
    {
        char buf[5] = {5,4,3,2,1};    
        assert(7 == strlcpy(buf, "abcdef", 1));
        assert(buf[0] == 0); // it puts the zero there
        assert(buf[1] == 4);
    }
    
    // strlncpy
    {
        char buf[5] = {0,1,2,3,4};    
        assert(3 == strlncpy(buf, "abcdefgh", 4, 2));
        assert(buf[0] == 'a');
        assert(buf[1] == 'b');
        assert(buf[2] == 0);
        assert(buf[3] == 3);
    }
    {
        char buf[5] = {0,1,2,3,4};    
        assert(5 == strlncpy(buf, "abcdefgh", 5, 4));
        assert(buf[0] == 'a');
        assert(buf[1] == 'b');
        assert(buf[2] == 'c');
        assert(buf[3] == 'd');
        assert(buf[4] == 0);
    }
    {
        char buf[5] = {5,4,3,2,1};    
        assert(2 == strlncpy(buf, "abcdef", 1, 1));
        assert(buf[0] == 0); // it puts the zero there
        assert(buf[1] == 4);
    }
    
    // strlcat
    {
        char buf[8] = {0,1,2,3,4,5,6,7};
        assert(2 == strlcat(buf, "a", 8));
        assert(buf[0] == 'a');
        assert(buf[1] == 0);
        assert(buf[2] == 2);
    }
    {
        char buf[8] = {0,1,2,3,4,5,6,7};
        assert(3 == strlcat(buf, "ab", 8));
        assert(buf[0] == 'a');
        assert(buf[1] == 'b');
        assert(buf[2] == 0);
        assert(buf[3] == 3);
        
        assert(5 == strlcat(buf, "xx", 8));
        assert(0==strcmp(buf,"abxx"));
        
        assert(5 == strlcat(buf, "", 8)); // this just sets the terminator
        assert(0==strcmp(buf,"abxx"));
        
        assert(8 == strlcat(buf, "dog", 8));
        assert(0==strcmp(buf,"abxxdog"));
        
        assert(10 == strlcat(buf, "ff", 8));
        assert(0==strcmp(buf,"abxxdog"));
    }
    {
        char buf[5] = {5,4,3,2,1};
        assert(7 == strlcat(buf, "abcdef", 1));
        assert(buf[0] == 0); // it puts the zero there
        assert(buf[1] == 4);
    }


    // strlncat
    {
        char buf[8] = {0,1,2,3,4,5,6,7};
        assert(2 == strlncat(buf, "a", 8, 1));
        assert(buf[0] == 'a');
        assert(buf[1] == 0);
        assert(buf[2] == 2);
    }
    {
        char buf[8] = {0,1,2,3,4,5,6,7};
        assert(2 == strlncat(buf, "a", 8, 50)); // larger n than string size
        assert(buf[0] == 'a');
        assert(buf[1] == 0);
        assert(buf[2] == 2);
    }
    {
        char buf[8] = {0,1,2,3,4,5,6,7};
        assert(26 == strlncat(buf, "abcdefghijklmnopqrstuvwyx", 8, 50)); // larger n than string size & larger than capacity
        assert(0==strcmp(buf, "abcdefg"));
    }
    {
        char buf[8] = {0,1,2,3,4,5,6,7};
        assert(5 == strlncat(buf, "abcd", 8, 50)); // larger n than string size & larger than capacity
        assert(0==strcmp(buf, "abcd"));
        assert(buf[4] == 0);
        assert(buf[5] == 5);
    }
    {
        char buf[8] = {0,1,2,3,4,5,6,7};
        assert(3 == strlncat(buf, "abcdef", 8, 2));
        assert(buf[0] == 'a');
        assert(buf[1] == 'b');
        assert(buf[2] == 0);
        assert(buf[3] == 3);

        assert(5 == strlncat(buf, "xxyyyyy", 8, 2));
        assert(0==strcmp(buf,"abxx"));

        assert(5 == strlncat(buf, "", 8, 100)); // this just sets the terminator
        assert(0==strcmp(buf,"abxx"));

        assert(5 == strlncat(buf, "", 8, 0));
        assert(0==strcmp(buf,"abxx"));

        assert(8 == strlncat(buf, "doggg", 8, 3));
        assert(0==strcmp(buf,"abxxdog"));

        assert(10 == strlncat(buf, "ffxxx", 8, 2));
        assert(0==strcmp(buf,"abxxdog"));
    }
    {
        char buf[5] = {5,4,3,2,1};
        assert(2 == strlncat(buf, "abcdef", 1, 1));
        assert(buf[0] == 0); // it puts the zero there
        assert(buf[1] == 4);
    }
    
    // this is a test that asserts are evaluated
    assert((printf("all ok\n"), 1));
        
    return 0;
}