/*      $NetBSD: efun.c,v 1.12 2019/10/03 20:29:19 tnn Exp $    */

/*-
* Copyright (c) 2006 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#ifdef __RCSID
__RCSID("$NetBSD: efun.c,v 1.12 2019/10/03 20:29:19 tnn Exp $");
#endif

#include <err.h>
#include <errno.h>
#include <inttypes.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <util.h>

static void (*efunc)(int, const char *, ...) = err;

static void __dead
eexit(int e, const char *fmt __unused, ...)
{
       exit(e);
}

void (*
esetfunc(void (*ef)(int, const char *, ...)))(int, const char *, ...)
{
       void (*of)(int, const char *, ...) = efunc;
       efunc = ef == NULL ? eexit : ef;
       return of;
}

size_t
estrlcpy(char *dst, const char *src, size_t len)
{
       size_t rv;
       if ((rv = strlcpy(dst, src, len)) >= len) {
               errno = ENAMETOOLONG;
               (*efunc)(1,
                   "Cannot copy string; %zu chars needed %zu provided",
                   rv, len);
       }
       return rv;
}

size_t
estrlcat(char *dst, const char *src, size_t len)
{
       size_t rv;
       if ((rv = strlcat(dst, src, len)) >= len) {
               errno = ENAMETOOLONG;
               (*efunc)(1,
                   "Cannot append to string; %zu chars needed %zu provided",
                   rv, len);
       }
       return rv;
}

char *
estrdup(const char *s)
{
       char *d = strdup(s);
       if (d == NULL)
               (*efunc)(1, "Cannot copy string");
       return d;
}

char *
estrndup(const char *s, size_t len)
{
       char *d = strndup(s, len);
       if (d == NULL)
               (*efunc)(1, "Cannot copy string");
       return d;
}

void *
emalloc(size_t n)
{
       void *p = malloc(n);
       if (p == NULL && n != 0)
               (*efunc)(1, "Cannot allocate %zu bytes", n);
       return p;
}

void *
ecalloc(size_t n, size_t s)
{
       void *p = calloc(n, s);
       if (p == NULL && n != 0 && s != 0)
               (*efunc)(1, "Cannot allocate %zu blocks of size %zu", n, s);
       return p;
}

void *
erealloc(void *p, size_t n)
{
       void *q = realloc(p, n);
       if (q == NULL && n != 0)
               (*efunc)(1, "Cannot re-allocate %zu bytes", n);
       return q;
}

void
ereallocarr(void *p, size_t n, size_t s)
{
       int rv = reallocarr(p, n, s);
       if (rv != 0) {
               errno = rv;
               (*efunc)(1, "Cannot re-allocate %zu * %zu bytes", n, s);
       }
}

FILE *
efopen(const char *p, const char *m)
{
       FILE *fp = fopen(p, m);
       if (fp == NULL)
               (*efunc)(1, "Cannot open `%s'", p);
       return fp;
}

int
easprintf(char ** __restrict ret, const char * __restrict format, ...)
{
       int rv;
       va_list ap;
       va_start(ap, format);
       if ((rv = vasprintf(ret, format, ap)) == -1)
               (*efunc)(1, "Cannot format string");
       va_end(ap);
       return rv;
}

int
evasprintf(char ** __restrict ret, const char * __restrict format, va_list ap)
{
       int rv;
       if ((rv = vasprintf(ret, format, ap)) == -1)
               (*efunc)(1, "Cannot format string");
       return rv;
}

intmax_t
estrtoi(const char * nptr, int base, intmax_t lo, intmax_t hi)
{
       int e;
       intmax_t rv = strtoi(nptr, NULL, base, lo, hi, &e);
       if (e != 0) {
               errno = e;
               (*efunc)(1,
                   "Cannot convert string value '%s' with base %d to a number in range [%jd .. %jd]",
                   nptr, base, lo, hi);
       }
       return rv;
}

uintmax_t
estrtou(const char * nptr, int base, uintmax_t lo, uintmax_t hi)
{
       int e;
       uintmax_t rv = strtou(nptr, NULL, base, lo, hi, &e);
       if (e != 0) {
               errno = e;
               (*efunc)(1,
                   "Cannot convert string value '%s' with base %d to a number in range [%ju .. %ju]",
                   nptr, base, lo, hi);
       }
       return rv;
}