src/lib/u/debug.c

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*    software without specific prior written permission.
*
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/**
 * @author Anas Nashif
 */
#ifdef HAVE_CONFIG_H
#include <wsman_config.h>
#endif

#include <stdarg.h>
#include <stdio.h>

#include "u/libu.h"


static list_t *handlers = NULL;

unsigned int
debug_add_handler(debug_fn fn, debug_level_e level, void *user_data)
{
	lnode_t *new_node;
	debug_handler_t *handler =
	    (debug_handler_t *) u_malloc(sizeof(debug_handler_t));
	if (!handlers) {
		handlers = list_create(LISTCOUNT_T_MAX);
	}
	handler->fn = fn;
	handler->level = level;
	handler->user_data = user_data;

	if (list_count(handlers) > 0) {
		lnode_t *n = list_last(handlers);
		handler->id = ((debug_handler_t *) n->list_data)->id + 1;
	} else
		handler->id = 1;

	new_node = lnode_create(handler);
	list_append(handlers, new_node);

	return handler->id;
}

void debug_remove_handler(unsigned int id)
{
	lnode_t *iter = list_first(handlers);
	while (iter) {
		debug_handler_t *handler =
		    (debug_handler_t *) iter->list_data;

		if (handler->id == id) {
			list_delete(handlers, iter);
			lnode_destroy(iter);
			return;
		}
		iter = list_next(handlers, iter);
	}
}


void debug_destroy_handlers(void)
{
	list_destroy_nodes(handlers);
	list_destroy(handlers);
}

static void call_handlers(debug_level_e level, char *str)
{
	lnode_t *iter;
	debug_handler_t *handler;
	iter = list_first(handlers);
	while (iter) {
		handler = (debug_handler_t *) iter->list_data;
		if ((handler->level == DEBUG_LEVEL_ALWAYS) ||
		    (level <= handler->level))
			handler->fn(str, level, handler->user_data);
		iter = list_next(handlers, iter);
	}
}


void debug_full(debug_level_e level, const char *format, ...)
{
	va_list args;
	char *str;

	if (handlers == NULL) {
		return;
	}

	va_start(args, format);
	str = u_strdup_vprintf(format, args);
	va_end(args);

	call_handlers(level, str);

	u_free(str);
}



void
debug_full_verbose(debug_level_e level,
		   char *file,
		   int line, const char *proc, const char *format, ...)
{
	va_list args;
	char *str;
	char *body;

	if (handlers == NULL) {
		return;
	}

	va_start(args, format);
	body = u_strdup_vprintf(format, args);
	va_end(args);
	str = u_strdup_printf("[%d] %s:%d(%s) %s",
			      level, file, line, proc, body);
	u_free(body);

	call_handlers(level, str);

	u_free(str);
}