memcmp1.c

ecos实时嵌入式操作系统

//=================================================================
//
//        memcmp1.c
//
//        Testcase for C library memcmp()
//
//=================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
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// or inline functions from this file, or you compile this file and link it
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//####ECOSGPLCOPYRIGHTEND####
//=================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     ctarpy, jlarmour
// Contributors:  
// Date:          2000-04-30
// Description:   Contains testcode for C library memcmp() 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 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];

    CYG_TEST_INIT();

    CYG_TEST_INFO("Starting tests from testcase " __FILE__ " for C library "
                  "memcmp() function");
    CYG_TEST_INFO("This testcase provides simple basic tests");

    // Check 1
    my_strcpy(x, "I have become, comfortably numb");
    my_strcpy(y, "I have become, comfortably numb");
    CYG_TEST_PASS_FAIL( (memcmp(x, y, my_strlen(x)) == 0), "Simple compare");


    // Check 2
    my_strcpy(x, "");
    my_strcpy(y, "");
    CYG_TEST_PASS_FAIL( (memcmp(x, y, 0) == 0), "Simple empty string compare");


    // Check 3
    my_strcpy(x, "..shall snuff it. And the Lord did grin");
    my_strcpy(y, "..shall snuff it. And the Lord did grio");
    CYG_TEST_PASS_FAIL( (memcmp(x, y, my_strlen(x)) < 0),
                        "Memory less than #1" );


    // Check 4
    my_strcpy(x, "A reading from the Book of Armaments, Chapter 4, "
                  "Verses 16 to 20:");
    my_strcpy(y, "Bless this, O Lord, that with it thou mayst blow thine "
                 "enemies to tiny bits, in thy mercy.");
    CYG_TEST_PASS_FAIL( (memcmp(x, y, my_strlen(x)) < 0),
                        "Memory less than #2");

    // Check 5
    my_strcpy(x, "Lobeth this thy holy hand grenade at thy foe");
    my_strcpy(y, "Lobeth this thy holy hand grenade at thy fod");
    CYG_TEST_PASS_FAIL( (memcmp(x, y, my_strlen(x)) > 0),
                        "Memory greater than #1" );


    // Check 6
    my_strcpy(y, "Three shall be the number of the counting and the");
    my_strcpy(x, "number of the counting shall be three");
    CYG_TEST_PASS_FAIL( (memcmp(x, y, my_strlen(x)) > 0),
                        "Memory greater than #2" );

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

    CYG_TEST_FINISH("Finished tests from testcase " __FILE__ " for C library "
                    "memcmp() function");
} // main()



// EOF memcmp1.c