FILE * general = fopen( "testing/scanf_testdata_general", "wb+" );
    TESTCASE( general != NULL );
    TESTCASE( fwrite( "12345678901\0003-5+7\0009\3772 4 6 8 0\3771 \011 5%%  0", 1, 40, general ) == 40 );
    rewind( general );

    FILE * decimal = fopen( "testing/scanf_testdata_decimal", "wb+" );
    TESTCASE( decimal != NULL );
    TESTCASE( fwrite( "-0 +0 -128 +127 +255 -32768 +32767 +65535\n"
                      "-2147483648 +2147483647 +4294967295\n"
                      "-9223372036854775808 +9223372036854775807\n"
                      "+18446744073709551615\n", 1, 142, decimal ) == 142 );
    rewind( decimal );

    FILE * hexadecimal = fopen( "testing/scanf_testdata_hexadecimal", "wb+" );
    TESTCASE( hexadecimal != NULL );
    TESTCASE( fwrite( "-0x0 -0x000 -0x7f -0x80 0xff -0x7fff -0x8000\n"
                      "0xffff -0x7fffffff -0x80000000 0xffffffff\n"
                      "-0x7fffffffffffffff -0x8000000000000000\n"
                      "0xffffffffffffffff\n", 1, 146, hexadecimal ) == 146 );
    rewind( hexadecimal );

    FILE * octal = fopen( "testing/scanf_testdata_octal", "wb+" );
    TESTCASE( octal != NULL );
    TESTCASE( fwrite( "+0000 -0000 +0177 +0377 -0377 +077777 +0177777\n"
                      "-0177777 +017777777777 +037777777777\n"
                      "-037777777777 +0777777777777777777777\n"
                      "+01777777777777777777777\n"
                      "-01777777777777777777777\n", 1, 172, octal ) == 172 );
    rewind( octal );

    FILE * alpha = fopen( "testing/scanf_testdata_alpha", "wb+" );
    TESTCASE( alpha != NULL );
    TESTCASE( fwrite( "abcdefgh-ijklmnop[qrs%uvw]xyz", 1, 29, alpha ) == 29 );
    rewind( alpha );

#ifndef REGTEST
    FILE * special = fopen( "testing/scanf_testdata_special", "wb+" );
    TESTCASE( special != NULL );
    TESTCASE( fwrite( "-0xz\n", 1, 5, special ) == 5 );
    rewind( special );
#endif


/* fscan */
#define TESTSCAN( result, count, source, offset, ... ) \
    do \
    { \
        int n = -1; \
        TESTCASE( fseek( source, offset, SEEK_SET ) == 0 ); \
        int res = SCANFUNC( source, __VA_ARGS__ ); \
        if ( res != result ) \
        { \
            rc += 1; \
            printf( "FAILED: " __FILE__ ", line %d - expected result %d, got %d\n", __LINE__, result, res ); \
        } \
        if ( n != count ) \
        { \
            rc += 1; \
            printf( "FAILED: " __FILE__ ", line %d - expected count %d, got %d\n", __LINE__, count, n ); \
        } \
    } while ( 0 )

#define SCAN( format )           format "%n",              &n
#define SCANPARMS( format, ... ) format "%n", __VA_ARGS__, &n

#define _PDCLIB_FSCAN