libsmartcols/src/init.c

/*
 * Copyright (C) 2014 Karel Zak <kzak@redhat.com>
 *
 * This file may be redistributed under the terms of the
 * GNU Lesser General Public License.
 */

/**
 * SECTION: init
 * @title: Library initialization
 * @short_description: initialize debugging
 *
 * The library debug stuff.
 */

#include <stdarg.h>

#include "smartcolsP.h"

UL_DEBUG_DEFINE_MASK(libsmartcols);
UL_DEBUG_DEFINE_MASKNAMES(libsmartcols) =
{
	{ "all", SCOLS_DEBUG_ALL,	"info about all subsystems" },
	{ "buff", SCOLS_DEBUG_BUFF,	"output buffer utils" },
	{ "cell", SCOLS_DEBUG_CELL,	"table cell utils" },
	{ "col", SCOLS_DEBUG_COL,	"cols utils" },
	{ "help", SCOLS_DEBUG_HELP,	"this help" },
	{ "line", SCOLS_DEBUG_LINE,	"table line utils" },
	{ "tab", SCOLS_DEBUG_TAB,	"table utils" },
	{ NULL, 0, NULL }
};

/**
 * scols_init_debug:
 * @mask: debug mask (0xffff to enable full debugging)
 *
 * If the @mask is not specified, then this function reads
 * the LIBSMARTCOLS_DEBUG environment variable to get the mask.
 *
 * Already initialized debugging stuff cannot be changed. Calling
 * this function twice has no effect.
 */
void scols_init_debug(int mask)
{
	if (libsmartcols_debug_mask)
		return;

	__UL_INIT_DEBUG_FROM_ENV(libsmartcols, SCOLS_DEBUG_, mask, LIBSMARTCOLS_DEBUG);

	if (libsmartcols_debug_mask != SCOLS_DEBUG_INIT
	    && libsmartcols_debug_mask != (SCOLS_DEBUG_HELP|SCOLS_DEBUG_INIT)) {
		const char *ver = NULL;

		scols_get_library_version(&ver);

		DBG(INIT, ul_debug("library debug mask: 0x%04x", libsmartcols_debug_mask));
		DBG(INIT, ul_debug("library version: %s", ver));
	}
	ON_DBG(HELP, ul_debug_print_masks("LIBSMARTCOLS_DEBUG",
				UL_DEBUG_MASKNAMES(libsmartcols)));
}