mirror of
https://github.com/AppleWin/AppleWin.git
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189 lines
4.3 KiB
C++
189 lines
4.3 KiB
C++
/*
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* This file is a consolidation of functions required for tfe
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* emulation taken from the following files
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*
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* lib.c - Library functions.
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* util.c - Miscellaneous utility functions.
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* crc32.c
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*
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* Written by
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* Andreas Boose <viceteam@t-online.de>
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* Ettore Perazzoli <ettore@comm2000.it>
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* Andreas Matthies <andreas.matthies@gmx.net>
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* Tibor Biczo <crown@mail.matav.hu>
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* Spiro Trikaliotis <Spiro.Trikaliotis@gmx.de>*
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*
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* This file is part of VICE, the Versatile Commodore Emulator.
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* See README for copyright notice.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA.
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*
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <windows.h>
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#include <windowsx.h>
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#include <tchar.h>
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#include <commctrl.h>
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#include <commdlg.h>
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#include "tfesupp.h"
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// Lib Stuff
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/* #define LIB_DEBUG*/
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#ifdef LIB_DEBUG
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#define LIB_DEBUG_SIZE 0x10000
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#define LIB_DEBUG_GUARD 0x1000
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#endif
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#define CRC32_POLY 0xedb88320
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static unsigned long crc32_table[256];
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static int crc32_is_initialized = 0;
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void lib_free(void *ptr)
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{
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#ifdef LIB_DEBUG
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lib_debug_free(ptr, 1, 1);
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#endif
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#ifdef LIB_DEBUG
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lib_debug_libc_free(ptr);
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#else
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free(ptr);
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#endif
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}
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void *lib_malloc(size_t size)
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{
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#ifdef LIB_DEBUG
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void *ptr = lib_debug_libc_malloc(size);
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#else
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void *ptr = malloc(size);
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#endif
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#ifndef __OS2__
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if (ptr == NULL && size > 0)
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exit(-1);
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#endif
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#ifdef LIB_DEBUG
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lib_debug_alloc(ptr, size, 3);
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#endif
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return ptr;
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}
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/*-----------------------------------------------------------------------*/
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/* Malloc enough space for `str', copy `str' into it and return its
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address. */
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char *lib_stralloc(const char *str)
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{
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size_t size;
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char *ptr;
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if (str == NULL)
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exit(-1);
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size = strlen(str) + 1;
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ptr = (char *)lib_malloc(size);
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memcpy(ptr, str, size);
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return ptr;
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}
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/* Like realloc, but abort if not enough memory is available. */
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void *lib_realloc(void *ptr, size_t size)
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{
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#ifdef LIB_DEBUG
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void *new_ptr = lib_debug_libc_realloc(ptr, size);
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#else
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void *new_ptr = realloc(ptr, size);
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#endif
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#ifndef __OS2__
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if (new_ptr == NULL)
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exit(-1);
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#endif
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#ifdef LIB_DEBUG
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lib_debug_free(ptr, 1, 0);
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lib_debug_alloc(new_ptr, size, 1);
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#endif
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return new_ptr;
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}
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// Util Stuff
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/* Set a new value to the dynamically allocated string *str.
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Returns `-1' if nothing has to be done. */
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int util_string_set(char **str, const char *new_value)
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{
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if (*str == NULL) {
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if (new_value != NULL)
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*str = lib_stralloc(new_value);
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} else {
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if (new_value == NULL) {
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lib_free(*str);
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*str = NULL;
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} else {
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/* Skip copy if src and dest are already the same. */
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if (strcmp(*str, new_value) == 0)
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return -1;
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*str = (char *)lib_realloc(*str, strlen(new_value) + 1);
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strcpy(*str, new_value);
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}
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}
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return 0;
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}
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// crc32 Stuff
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unsigned long crc32_buf(const char *buffer, unsigned int len)
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{
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int i, j;
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unsigned long crc, c;
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const char *p;
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if (!crc32_is_initialized) {
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for (i = 0; i < 256; i++) {
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c = (unsigned long) i;
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for (j = 0; j < 8; j++)
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c = c & 1 ? CRC32_POLY ^ (c >> 1) : c >> 1;
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crc32_table[i] = c;
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}
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crc32_is_initialized = 1;
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}
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crc = 0xffffffff;
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for (p = buffer; len > 0; ++p, --len)
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crc = (crc >> 8) ^ crc32_table[(crc ^ *p) & 0xff];
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return ~crc;
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}
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