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

//

//        snprintf.c

//

//        Testcase for C library snprintf() implementation

//

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

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

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

//

// Author(s):       Uwe Kindler

// Contributors:

// Date:            2009-08-05

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

//

//

//####DESCRIPTIONEND####

// CONFIGURATION

#include <pkgconf/libc_stdio.h>   // Configuration header

// INCLUDES

#include <stdio.h>

#include <cyg/infra/testcase.h>

static int my_strnlen(const char *s, size_t maxlen)

{

    const char *ptr;

    const char *endptr;

    ptr = s;

    endptr = s + maxlen;

    while ((*ptr != '\0') && (ptr != endptr))

    {

        ptr++;

    }

    return (int)(ptr-s);

} // my_strlen()

static void

test( CYG_ADDRWORD data )

{

    static char x[32];

    static char y[4];

    int xret;

    int yret;

    int xstrlen;

    int ystrlen;

    // fill buffer to ensure that there are no zeros in the buffers

    memset(x, 0xFF, sizeof(x));

    memset(y, 0xFF, sizeof(y));

    // print into a buffer with sufficient size 

    xret = snprintf(x, sizeof(x), "%d:%d:%d:%d", 1, 2, 3, 4);

    xstrlen = my_strnlen(x, sizeof(x));

    // print into a buffer that is too small

    yret = snprintf(y, sizeof(y), "%d:%d:%d:%d", 1, 2, 3, 4);

    ystrlen = my_strnlen(y, sizeof(y));

    CYG_TEST_PASS_FAIL(xret == xstrlen, "[buffer > strlen] return code");

#ifdef CYGIMP_LIBC_STDIO_C99_SNPRINTF

    // C99 compliant implementation returns the number of characters that 

    // would have been written had size been sufficiently large, 

    // not counting the terminating nul character

    CYG_TEST_PASS_FAIL(xret == yret, "[buffer < strlen] return code");

    CYG_TEST_INFO("C99 compliant implementation of snprintf()");

#else

    // default eCos implementation returns number of bytes written into

    // the buffer without terminating nul character

    CYG_TEST_PASS_FAIL(yret == ystrlen, "[buffer < strlen] return code");

    CYG_TEST_INFO("Default implementation of snprintf() (no C99 compliance)");

#endif

    CYG_TEST_FINISH("Finished tests from testcase " __FILE__

                    " for C library snprintf() function return values");

} // test()

int

main(int argc, char *argv[])

{

    CYG_TEST_INIT();

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

                  "library snprintf() function return values");

    CYG_TEST_INFO("These test return values of snprinf() family of functions");

    test(0);

    return 0;

} // main()

// EOF snprintf.c