Module Config

A small configuration value can be centralized so functions agree on limits.

module_config.c

#include <stdio.h>

enum {
    MAX_ITEMS = 4
};

static int capped_count(int requested) {
    if (requested > MAX_ITEMS) {
        return MAX_ITEMS;
    }
    return requested;
}

int main(void) {
    int requested = ;
    int count = capped_count(requested);

    printf("count=%d\n", count);
    return 0;
}

#include <stdio.h>

enum {
    MAX_ITEMS = 4
};

static int capped_count(int requested) {
    if (requested > MAX_ITEMS) {
        return MAX_ITEMS;
    }
    return requested;
}

int main(void) {
    int requested = ;
    int count = capped_count(requested);

    printf("count=%d\n", count);
    return 0;
}

#include <stdio.h>

enum {
    MAX_ITEMS = 4
};

static int capped_count(int requested) {
    if (requested > MAX_ITEMS) {
        return MAX_ITEMS;
    }
    return requested;
}

int main(void) {
    int requested = ;
    int count = capped_count(requested);

    printf("count=%d\n", count);
    return 0;
}

shared limit Centralizing a limit avoids repeating unexplained numbers in each function.

enum constant An `enum` constant gives the compiler a named integer without preprocessor substitution.