libpkg/common/pkgerr.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */


/*
 * Module:  pkgerr.c
 * Description:
 *  Module for handling error messages that come from libpkg libraries.
 */

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <locale.h>
#include <libintl.h>
#include <stdlib.h>
#include <sys/varargs.h>
#include "pkgerr.h"

/* max length of any formatted error message */
#define MAX_ERRMSGLEN   1024

/* private structures (not visible outside this file) */
struct _pkg_err_struct {
    int         nerrs;
    char        **msgs;
    PKG_ERR_CODE    *errs;
};

/* ---------------------- public functions ----------------------- */

PKG_ERR
*pkgerr_new()
{
    PKG_ERR *newerr;

    newerr = (PKG_ERR *)malloc(sizeof (PKG_ERR));
    newerr->nerrs = 0;
    newerr->msgs = NULL;
    newerr->errs = NULL;
    return (newerr);
}

/*PRINTFLIKE3*/
void
pkgerr_add(PKG_ERR *err, PKG_ERR_CODE code, char *fmt, ...)
{
    char        errmsgbuf[1024];
    va_list     ap;

    va_start(ap, fmt);
    (void) vsnprintf(errmsgbuf, MAX_ERRMSGLEN, fmt, ap);
    va_end(ap);

    err->nerrs++;

    err->msgs = (char **)realloc(err->msgs,
        err->nerrs * sizeof (char *));
    err->errs = (PKG_ERR_CODE *)realloc(err->errs,
        err->nerrs * sizeof (PKG_ERR_CODE));
    err->msgs[err->nerrs - 1] = strdup(errmsgbuf);
    err->errs[err->nerrs - 1] = code;
}

void
pkgerr_clear(PKG_ERR *err)
{
    int i;

    for (i = 0; i < err->nerrs; i++) {
        free(err->msgs[i]);
    }

    free(err->msgs);
    free(err->errs);
    err->msgs = NULL;
    err->errs = NULL;
    err->nerrs = 0;
}

int
pkgerr_num(PKG_ERR *err)
{
    return (err->nerrs);
}

char
*pkgerr_get(PKG_ERR *err, int pos)
{
    if (pos < 0 || pos > (err->nerrs - 1)) {
        return (NULL);
    }

    return (err->msgs[pos]);
}

void
pkgerr_free(PKG_ERR *err)
{
    pkgerr_clear(err);
    free(err);
}