/*
 * $Header: /mit/krb5/.cvsroot/src/util/et/error_message.c,v 5.0 1993/04/13 19:56:17 tytso Exp $
 * $Source: /mit/krb5/.cvsroot/src/util/et/error_message.c,v $
 * $Locker:  $
 *
 * Copyright 1987 by the Student Information Processing Board
 * of the Massachusetts Institute of Technology
 *
 * For copyright info, see "mit-sipb-copyright.h".
 */

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "com_err.h"
#include "error_table.h"
#include "mit-sipb-copyright.h"
#include "internal.h"

static char buffer[25];

struct et_list *_et_list = (struct et_list *) NULL;


#ifdef __STDC__
const char *
 error_message(errcode_t code)
#else
const char *
 error_message(code)
errcode_t code;
#endif
{
	int offset;
	struct et_list *et;
	int table_num;
	int started = 0;
	char *cp;

	offset = code & ((1 << ERRCODE_RANGE) - 1);
	table_num = code - offset;
	if (!table_num) {
#ifdef HAS_SYS_ERRLIST
		if (offset < sys_nerr)
			return (sys_errlist[offset]);
		else
			goto oops;
#else
		cp = strerror(offset);
		if (cp)
			return (cp);
		else
			goto oops;
#endif
	}
	for (et = _et_list; et; et = et->next) {
		if (et->table->base == table_num) {
			/* This is the right table */
			if (et->table->n_msgs <= offset)
				goto oops;
			return (et->table->msgs[offset]);
		}
	}
      oops:
	strcpy(buffer, "Unknown code ");
	if (table_num) {
		strcat(buffer, error_table_name(table_num));
		strcat(buffer, " ");
	}
	for (cp = buffer; *cp; cp++);
	if (offset >= 100) {
		*cp++ = '0' + offset / 100;
		offset %= 100;
		started++;
	}
	if (started || offset >= 10) {
		*cp++ = '0' + offset / 10;
		offset %= 10;
	}
	*cp++ = '0' + offset;
	*cp = '\0';
	return (buffer);
}