Hello,
When I try to run: make ex19 or cc -Wall -g -DNDEBUG ex19.c -o ex19 I get a MASSIVE list of compile warnings and errors. Terrifying. I have read and reread my code (forwards and backwards) to scour for errors but I think I’ve copied the code correctly. I think the issue may be some problem with what version of C++ compiler I have? Hopefully it’s something much simpler/dumber than that!
Here is my code for dbg.h: (ignore the strange formatting of the first two lines!)
#ifndef __dbg_h__
#define __dbg_h__
#include <stdio.h>
#include <errno.h>
#include <string.h>
#ifdef NDEBUG
#define debug(M, ...)
#else
#define debug(M, ...) fprintf(stderr, "DEBUG %s:%d " M "\n", __FILE__, __LINE__, ##__VA_ARGS__)
#endif
#define clean_errno() (errno == 0 ? "None" : strerror(errno))
#define log_err(M, ...) fprintf(stderr, "[ERROR] (%s:%d: errno: ∞s) " M "\n", __FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)
#define log_warn(M, ...) fprintf(stderr, "[WARN] (%s:%d: errno: %s) " M "\n", __FILE__, __LINE__, clean_errno(), ##__VA_ARGS__)
#define log_info(M, ...) fprintf(stderr, "[INFO] (%s:%d) " M "\n", __FILE__, __LINE__, ##__VA_ARGS__)
#define check(A, M, ...) if(!(A)) { log_err(M, ##__VA_ARGS__); errno=0; goto error; }
#define sentinel(M, ...) { log_err(M, ##__VA_ARGS__); errno=0; goto error; }
#define check_mem(A) check((A) "Out of memory.")
#define check_debug(A, M, ...) if(!(A)) { debug(M, ##__VA_ARGS__); errno=0; goto error; }
#endifHere is my code for ex19.c:
#include "dbg.h"
#include <stdlib.h>
#include <stdio.h>
void test_debug()
{
//notice you don't need the \n
debug("I have Brown Hair.");
// passing in arguments like printf
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 consider 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) fclose(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("ex19.c") == 0, "failed with ex19.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;
}And here are the kinds of errors my terminal reports when i try to compile:
… there’s more…
Can anyone suss where I’m going wrong? Many thanks.
thank you Zed!