ENUM string

#include <stdio.h>
#include <assert.h>

char *enum_string_(int in, int enum_string_length, char *enum_string) {
    // strip whitespace and replace ',' with '\0' terminator.
    for(int i = 0, j = 0; i < enum_string_length; ++i, ++j)
    {
        while(enum_string[i] == ' ') ++i;
        enum_string[j] = enum_string[i];
        if(enum_string[j] == ',') enum_string[j] = 0;
    }
    // Find the correct string.
    for(int i = 0, count = 0; i < enum_string_length; ++i)
    {
        if(count == in)
        {
            return &enum_string[i];
        }
        if(enum_string[i] == 0) count++;
    }
    //assert(0);
    return "ENUM_STRING_ERROR";
}

#define ENUM(type, ...)                         \
enum struct type{__VA_ARGS__};                  \
static char type##_RAW_STRING[] = #__VA_ARGS__; \
char *enum_string(type in)                      \
{return enum_string_((int)in, sizeof(type##_RAW_STRING), type##_RAW_STRING);}

ENUM(eple ,a ,b ,c)
ENUM(pera ,a , b ,  dets)

int main(void)
{
    
    printf("%s\n", enum_string(pera::dets));
    printf("%s\n", enum_string((eple) 32));
    
    return 0;
}