About
A few macros that prints and returns the value of a given expression for quick and dirty debugging, inspired by Rusts dbg!(…) macro and its C++ variant.
dbg(expr) for primitive data types (int, float, etc.), strings and
pointers.
dbgb(expr) to force boolean true/false output.
dbga(expr, length) for array of primitive data types.
dbgh(expr, size) for hexdump output.
dbge(expr) for negative error codes.
dbgbt() for a backtrace.
Just include dbg.h in your project to use it.
Example
See examples for the files used in this example.
#include "dbg.h"
static int factorial(int n)
{
if (dbgb(n <= 1)) {
return dbg(1);
} else {
return dbg(n * factorial(n - 1));
}
}
int main()
{
char message[] = "hello";
dbg(message); // main.c:15: message = "hello"
dbgh(message, sizeof(message));
const int a = 2;
const int b = dbg(3 * a) + 1; // main.c:19: 3 * a = 6 (0x6)
int numbers[2] = { b, 13 };
dbga(numbers, 2); // main.c:22: numbers = [7, 13] (length: 2)
dbg(factorial(4));
dbge(-EINVAL);
dbgbt();
return (0);
}Build and run:
Compile time configuration
Define NDBG to make the macros a no-op.
Define DBG_NCOLOR for colorless output.
Define DBG_OSTREAM=<my-ostream> for custom output stream (stderr
by default).