C Switch/case macros, multiple cases

Question

(I know most people are going to say it's horrible).

I have written the following macros to easily write switchs using strings instead of if/else if/else :

#define str_switch( value )                                    \
do {                                                           \
    const char * __strswitchptr__ = (value);                   \
    if( 0 )                                                    \

#define str_case( test )                                       \
    } if( strcmp( __strswitchptr__, (test) ) == 0 ) {          \

#define str_default                                            \
    } else {                                                   \

#define str_switchend                                          \
} while( 0 );                                                  \

Which i am using this way :

char * sVal =  "D";

str_switch( sVal )
{
str_case( "A" )
    printf( "Case A" );
    break;
str_case( "B" )
    printf( "Case B" );
    break;
str_case( "C" )
    printf( "Case C" );
    break;
str_default
    printf( "Error" );
}
str_switchend

But i can't figure out how i could modify it so i could use multiple cases :

char * sVal =  "D";

str_switch( sVal )
{
str_case( "A" )
    printf( "Case A" );
    break;
str_case( "B" )
    printf( "Case B" );
    break;
str_case( "C" )
str_case( "D" )
str_case( "E" )
    printf( "Case C" );
    break;
str_default
    printf( "Error" );
}
str_switchend

Any idea ? Thanks :-)

Answer 1

How about this? When one case evaluates to true it will continue through all if's until a break is encountered:

#define str_switch( value )                                    \
do {                                                           \
    const char * __strswitchptr__ = (value);                   \
    int __previous_case_true = 0;                              \
    if( 0 )                                                    \

#define str_case( test )                                       \
    } if(  __previous_case_true                                \
        || strcmp( __strswitchptr__, (test) ) == 0 ) {         \
        __previous_case_true = 1;                              \

#define str_default                                            \
    } {                                                        \

#define str_switchend                                          \
} while( 0 );