ex20.c

#include <stdio.h>
#include <stdlib.h>
#include "dbg.h"

void test_debug() {
    debug("I have black hair.");
    debug("I am %d years old.", 37);
}

void test_log_err() {
    log_err("I believe everything is broken.");
    log_err("There are %d problems in %s.", 0, "space");
}

void test_log_warn() {
    log_warn("You can safely ignore this.");
    log_warn("Maybe cosider looking at: %s.", "/etc/passwd");
}

void test_log_info() {
    log_info("Well I did something mundane.");
    log_info("It happened %f times today.", 1.3f);
}

int test_check(char *file_name) {
    FILE *input = NULL;
    char *block = NULL;

    block = malloc(100);
    check_mem(block);

    input = fopen(file_name, "r");
    check(input, "Failed to open %s.", file_name);

    free(block);
    fclose(input);
    
    return 0;


error:
    if (block)  free(block);
    if (input)  free(input);
    return -1;    
}


int test_sentinel(int code) {
    char *temp = malloc(100);
    check_mem(temp);

    switch (code) {
        case 1:
            log_info("It worked!");
            break;
        default:
            sentinel("I shouldn't run.");
    }

    free(temp);
    return 0;

error:
    if (temp)  free(temp);
    return -1;
}

int test_check_mem() {
    char *test = NULL;
    check_mem(test);

    free(test);
    return 1;

error:
    return -1;
}

int test_check_debug() {
    int i = 0;
    check_debug(i != 0, "Oops, i was 0.");

    return 0;

error:
    return -1;
}


int main(int argc, char *argv[]) {
    check(argc == 2, "Need an argument.");

    test_debug();
    test_log_err();
    test_log_warn();
    test_log_info();

    check(test_check("ex20.c") == 0, "failed with ex20.c");
    check(test_check(argv[1]) == -1, "failed with argv");
    check(test_sentinel(1) == 0, "test_sentinel failed.");
    check(test_sentinel(100) == -1, "test_sentinel failed.");
    check(test_check_mem() == -1, "test_check_mem failed.");
    check(test_check_debug() == -1, "test_check_debug failed.");

    return 0;

error:
    return 1;
}