Conditional debugging for C libraries and applications. Based off of visionmedia/debug and tj/go-debug.
#include "debug.h"
debug_t debugger;
int
main() {
// init debugger
debug_init(&debugger, "myapp");
// log a message
debug(&debugger, "doing stuff");
return 0;
}Set DEBUG to see output from your application. When set to app (DEBUG=app), you'll see messages from the debugger named app. When set to app* (DEBUG=app*), you'll see debug messages from all debuggers whose name begins with app.
You may also set DEBUG=* to see all debugging messages.
Set DEBUG_COLORS to 0, no, disabled or false to not use ANSI-escape sequences when printing debug messages.
If DEBUG_COLORS is not set, and debugger.stream is a TTY, colors will be used.
By default, debug prints to stderr. If you don't like this behavior, you may set the stream to any arbitrary FILE *:
FILE *fp = fopen("debugs.txt", "w");
debug_t debugger;
debug_init(&debugger, "whatever");
debugger.stream = fp;
debug(&debugger, "hi");MIT