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/*
int2tap - Convert an Intel segment file to a loadable Spectrum tape file
Copyright (C) 2004 Ian Cowburn (ianc@noddybox.demon.co.uk)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-------------------------------------------------------------------------
*/
static const char id[]="$Id$";
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "tap.h"
static const char header_id[]=I2T_TAP_H;
/* ---------------------------------------- CONSTANTS
*/
#undef TRUE
#undef FALSE
#define TRUE 1
#define FALSE 0
/* ---------------------------------------- TYPES
*/
/* ---------------------------------------- GLOBALS
*/
extern const char *progname;
static FILE *fp;
static int file_no;
/* ---------------------------------------- PRIVATE FUNCTIONS
*/
unsigned char TapWord(unsigned w, unsigned char chk)
{
putc(w&0xff,fp);
chk^=w&0xff;
putc(w>>8,fp);
chk^=w>>8;
return chk;
}
unsigned char TapByte(unsigned char c, unsigned char chk)
{
putc(c,fp);
chk^=c;
return chk;
}
unsigned char TapString(char *p, int len, unsigned char chk)
{
while(len--)
{
chk=TapByte(*p++,chk);
}
return chk;
}
unsigned char TapStream(const unsigned char p[0x10000],
unsigned addr, unsigned len, unsigned char chk)
{
while(len--)
{
chk=TapByte(p[addr],chk);
addr=(addr+1)&0xffff;
}
return chk;
}
/* ---------------------------------------- INTERFACES
*/
int TapOpen(const char *filename)
{
file_no=0;
if (!(fp=fopen(filename,"wb")))
{
fprintf(stderr,"%s: Failed to create %s\n",progname,filename);
}
return fp!=NULL;
}
void TapWrite(const unsigned char mem[0x1000],
unsigned addr, unsigned len, int is_code)
{
char name[11]={0};
unsigned char chk;
sprintf(name,"%10.10d",file_no);
file_no=(file_no+1)%10000;
/* Output file header
*/
chk=TapWord(19,chk);
chk=TapByte(0,chk);
if (is_code)
{
chk=TapByte(3,chk);
}
else
{
chk=TapByte(3,chk);
}
chk=TapString(name,10,chk);
chk=TapWord(len,chk);
if (is_code)
{
chk=TapWord(addr,chk);
chk=TapWord(32768,chk);
}
else
{
chk=TapWord(0,chk);
chk=TapWord(0,chk);
}
TapByte(chk,0);
/* Output file data
*/
chk=0;
chk=TapWord(len+2,chk);
chk=TapStream(mem,addr,len,chk);
TapByte(chk,0);
}
void TapClose(void)
{
if (fp)
{
fclose(fp);
fp=NULL;
}
}
/* END OF FILE */
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