xbps/lib/log.c

/*-
 * Copyright (c) 2011-2015 Juan Romero Pardines.
 * Copyright (c) 2014 Enno Boland.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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

#include "xbps_api_impl.h"

#ifdef __clang__
#pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif

int xbps_debug_level = 0;

/**
 * @file lib/log.c
 * @brief Logging functions
 * @defgroup log Logging functions
 *
 * Use these functions to log errors, warnings and debug messages.
 */

static void
common_printf(FILE *f, const char *msg, const char *fmt, va_list ap)
{
	if (msg != NULL)
		fprintf(f, "%s", msg);

	vfprintf(f, fmt, ap);
}

void
xbps_dbg_printf_append(const char *fmt, ...)
{
	va_list ap;

	if (xbps_debug_level == 0)
		return;

	va_start(ap, fmt);
	common_printf(stderr, NULL, fmt, ap);
	va_end(ap);
}

void
xbps_dbg_printf(const char *fmt, ...)
{
	va_list ap;

	if (xbps_debug_level == 0)
		return;

	va_start(ap, fmt);
	common_printf(stderr, "[DEBUG] ", fmt, ap);
	va_end(ap);
}

void
xbps_error_printf(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	common_printf(stderr, "ERROR: ", fmt, ap);
	va_end(ap);
}

void
xbps_warn_printf(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	common_printf(stderr, "WARNING: ", fmt, ap);
	va_end(ap);
}