lib.c revision 267654
1/*- 2 * Copyright (c) 1999 Global Technology Associates, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 19 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 20 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 21 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 23 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 24 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: releng/9.3/sys/boot/i386/kgzldr/lib.c 119482 2003-08-25 23:28:32Z obrien $"); 29 30#include <sys/types.h> 31#include <stddef.h> 32 33#include "kgzldr.h" 34 35#define MEMSIZ 0x8000 /* Memory pool size */ 36 37int kgz_con; /* Console control */ 38 39static size_t memtot; /* Memory allocated: bytes */ 40static u_int memcnt; /* Memory allocated: blocks */ 41 42/* 43 * Library functions required by inflate(). 44 */ 45 46/* 47 * Allocate memory block. 48 */ 49unsigned char * 50kzipmalloc(int size) 51{ 52 static u_char mem[MEMSIZ]; 53 void *ptr; 54 55 if (memtot + size > MEMSIZ) 56 return NULL; 57 ptr = mem + memtot; 58 memtot += size; 59 memcnt++; 60 return ptr; 61} 62 63/* 64 * Free allocated memory block. 65 */ 66void 67kzipfree(void *ptr) 68{ 69 memcnt--; 70 if (!memcnt) 71 memtot = 0; 72} 73 74/* 75 * Write a string to the console. 76 */ 77void 78putstr(const char *str) 79{ 80 int c; 81 82 while ((c = *str++)) { 83 if (kgz_con & KGZ_CRT) 84 crt_putchr(c); 85 if (kgz_con & KGZ_SIO) 86 sio_putchr(c); 87 } 88} 89