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/*-
* Copyright (c) 1999 Global Technology Associates, Inc.
* 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 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/boot/i386/kgzldr/lib.c 119482 2003-08-25 23:28:32Z obrien $");
#include <sys/types.h>
#include <stddef.h>
#include "kgzldr.h"
#define MEMSIZ 0x8000 /* Memory pool size */
int kgz_con; /* Console control */
static size_t memtot; /* Memory allocated: bytes */
static u_int memcnt; /* Memory allocated: blocks */
/*
* Library functions required by inflate().
*/
/*
* Allocate memory block.
*/
unsigned char *
kzipmalloc(int size)
{
static u_char mem[MEMSIZ];
void *ptr;
if (memtot + size > MEMSIZ)
return NULL;
ptr = mem + memtot;
memtot += size;
memcnt++;
return ptr;
}
/*
* Free allocated memory block.
*/
void
kzipfree(void *ptr)
{
memcnt--;
if (!memcnt)
memtot = 0;
}
/*
* Write a string to the console.
*/
void
putstr(const char *str)
{
int c;
while ((c = *str++)) {
if (kgz_con & KGZ_CRT)
crt_putchr(c);
if (kgz_con & KGZ_SIO)
sio_putchr(c);
}
}