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//=================================================================

//

//        strncpy1.c

//

//        Testcase for C library strncpy()

//

//=================================================================

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//=================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     ctarpy, jlarmour

// Contributors:  

// Date:          2000-04-30

// Description:   Contains testcode for C library strncpy() function

//

//

//####DESCRIPTIONEND####

// INCLUDES

#include <string.h>

#include <cyg/infra/testcase.h>

// FUNCTIONS

// Functions to avoid having to use libc strings

static int my_strlen(const char *s)

{

    const char *ptr;

    ptr = s;

    for ( ptr=s ; *ptr != '\0' ; ptr++ )

        ;

    return (int)(ptr-s);

} // my_strlen()

static int my_strncmp(const char *s1, const char *s2, size_t n)

{

    if (n==0)

        return 0;

    while (n-- != 0 && *s1 == *s2)

    {

        if (n == 0 || *s1 == '\0' || *s2 == '\0')

            break;

        s1++;

        s2++;

    }

    return (*s1 - *s2);

} // my_strncmp()

static int my_strcmp(const char *s1, const char *s2)

{

    for ( ; *s1 == *s2 ; s1++,s2++ )

    {

        if ( *s1 == '\0' )

            break;

    } // for

    return (*s1 - *s2);

} // my_strcmp()

static char *my_strcpy(char *s1, const char *s2)

{

    while (*s2 != '\0') {

        *(s1++) = *(s2++);

    }

    *s1 = '\0';

    return s1;

} // my_strcpy()

int

main( int argc, char *argv[] )

{

    char x[300];

    char y[300];

    char *ret;

    CYG_TEST_INIT();

    CYG_TEST_INFO("Starting tests from testcase " __FILE__ " for C library "

                  "strncpy() function");

    CYG_TEST_INFO("This testcase provides simple basic tests");

    // Check 1

    my_strcpy(x, "Nine rings for men doomed to die");

    ret = strncpy(y, "Nine rings for men doomed to die", my_strlen(x));

    CYG_TEST_PASS_FAIL( (my_strncmp(x, y, my_strlen(x)) == 0),

                        "Simple copy" );

    // Check return value

    CYG_TEST_PASS_FAIL( (y == ret), "Simple copy return value" );

    // Check 2

    my_strcpy(x, "");

    my_strcpy(y, "Seven rings for the dwarves in their halls of stone");

    ret = strncpy(y, x, 1);

    CYG_TEST_PASS_FAIL( (my_strcmp(y, "") == 0), "Copy empty string" );

    // Check return value

    CYG_TEST_PASS_FAIL( (y == ret), "Copy empty string return value" );

    // Check 3

    my_strcpy(x, "");

    my_strcpy(y, "Seven rings for the dwarves in their halls of stone");

    ret = strncpy(y, x, 0);

    if (my_strcmp(y, "Seven rings for the dwarves "

                     "in their halls of stone") == 0)

        CYG_TEST_PASS("Copy 0 characters");

    else

        CYG_TEST_FAIL("Copy 0 characters");

    // Check return value

    CYG_TEST_PASS_FAIL( (y == ret), "Copy empty string return value" );

//    CYG_TEST_NA("Testing is not applicable to this configuration");

    CYG_TEST_FINISH("Finished tests from testcase " __FILE__ " for C library "

                    "strncpy() function");

} // main()

// EOF strncpy1.c