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/*****************************************************************************/
/* */
/* diodemo.c */
/* */
/* Direct Disk I/O Demo Program */
/* */
/* */
/* */
/* (C) Copyright 2005, Oliver Schmidt, <ol.sc@web.de> */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#include <stddef.h>
#include <stdlib.h>
#include <limits.h>
#include <conio.h>
#include <ctype.h>
#include <errno.h>
#include <cc65.h>
#include <dio.h>
#define MAX_CHUNKS 10 /* Maximum acceptable number of chunks */
static unsigned char ScreenX;
static unsigned char ScreenY;
static void ClearLine (void)
/* Clear the screen line the cursor is on */
{
cputc ('\r');
cclear (ScreenX);
}
static unsigned char AskForDrive (const char* Name)
/* Ask for a drive id and return it */
{
unsigned char Drive = 0;
char Char;
cprintf ("\r\n%s Drive ID ? ", Name);
cursor (1);
do {
Char = cgetc ();
if (isdigit (Char)) {
cputc (Char);
Drive = Drive * 10 + Char - '0';
}
} while (Char != CH_ENTER);
cursor (0);
return Drive;
}
static void AskForDisk (const char* Name, unsigned char Drive)
/* Ask the user to insert a specific disk */
{
ClearLine ();
cprintf ("\rInsert %s Disk into Drive %d !", Name, Drive);
cgetc ();
}
static char* AllocBuffer (unsigned int SectSize, unsigned int SectCount, unsigned int* ChunkCount)
/* Allocate a copy buffer on the heap and return a pointer to it */
{
char* Buffer = NULL;
unsigned long BufferSize;
unsigned int Chunks = 1;
/* Increase number of chunks resp. decrease size */
/* of one chunk until buffer allocation succeeds */
do {
*ChunkCount = (unsigned int) ((SectCount + Chunks - 1) / Chunks);
BufferSize = *ChunkCount * (unsigned long) SectSize;
if (BufferSize < UINT_MAX) {
Buffer = malloc ((size_t) BufferSize);
}
} while (Buffer == NULL && ++Chunks <= MAX_CHUNKS);
return Buffer;
}
int main (int argc, const char* argv[])
{
unsigned char SourceId;
unsigned char TargetId;
dhandle_t Source = NULL;
dhandle_t Target = NULL;
unsigned int SectSize;
unsigned int SectCount;
char* Buffer;
unsigned int Sector;
unsigned int ChunkCount;
unsigned int ChunkOffset = 0;
clrscr ();
screensize (&ScreenX, &ScreenY);
/* Allow user to read exit messages */
if (doesclrscrafterexit ()) {
atexit ((void (*)) cgetc);
}
cputs ("Floppy Disk Copy\r\n");
chline (16);
cputs ("\r\n");
/* Get source and target drive id (which may very well be identical) */
switch (argc) {
case 1:
SourceId = AskForDrive ("Source");
TargetId = AskForDrive ("Target");
cputs ("\r\n");
break;
case 2:
SourceId = TargetId = atoi (argv[1]);
break;
case 3:
SourceId = atoi (argv[1]);
TargetId = atoi (argv[2]);
break;
default:
cprintf ("\r\nToo many arguments\r\n");
return EXIT_FAILURE;
}
cputs ("\r\n");
do {
/* Check for single drive copy or inital iteration */
if (SourceId == TargetId || Source == NULL) {
AskForDisk ("Source", SourceId);
}
/* Check for initial iteration */
if (Source == NULL) {
/* Open source drive */
Source = dio_open (SourceId);
if (Source == NULL) {
cprintf ("\r\n\nError %d on opening Drive %d\r\n", (int) _oserror, SourceId);
return EXIT_FAILURE;
}
SectSize = dio_query_sectsize (Source);
SectCount = dio_query_sectcount (Source);
/* Allocate buffer */
Buffer = AllocBuffer (SectSize, SectCount, &ChunkCount);
if (Buffer == NULL) {
cputs ("\r\n\nError on allocating Buffer\r\n");
return EXIT_FAILURE;
}
}
ClearLine ();
/* Read one chunk of sectors into buffer */
for (Sector = ChunkOffset; Sector < SectCount && (Sector - ChunkOffset) < ChunkCount; ++Sector) {
cprintf ("\rReading Sector %d of %d", Sector + 1, SectCount);
/* Read one sector */
if (dio_read (Source, Sector, Buffer + (Sector - ChunkOffset) * SectSize) != 0) {
cprintf ("\r\n\nError %d on reading from Drive %d\r\n", (int) _oserror, SourceId);
return EXIT_FAILURE;
}
}
/* Check for single drive copy or inital iteration */
if (TargetId == SourceId || Target == NULL) {
AskForDisk ("Target", TargetId);
}
/* Open target drive on initial iteration */
if (Target == NULL) {
Target = dio_open (TargetId);
if (Target == NULL) {
cprintf ("\r\n\nError %d on opening Drive %d\r\n", (int) _oserror, TargetId);
return EXIT_FAILURE;
}
/* Check for compatible drives */
if (dio_query_sectsize (Target) != SectSize ||
dio_query_sectcount (Target) != SectCount) {
cputs ("\r\n\nFormat mismatch between Drives\r\n");
return EXIT_FAILURE;
}
}
ClearLine ();
/* Write one chunk of sectors from buffer */
for (Sector = ChunkOffset; Sector < SectCount && (Sector - ChunkOffset) < ChunkCount; ++Sector) {
cprintf ("\rWriting Sector %d of %d", Sector + 1, SectCount);
/* Write one sector */
if (dio_write (Target, Sector, Buffer + (Sector - ChunkOffset) * SectSize) != 0) {
cprintf ("\r\n\nError %d on writing to Drive %d\r\n", (int) _oserror, TargetId);
return EXIT_FAILURE;
}
}
/* Advance to next chunk */
ChunkOffset += ChunkCount;
} while (Sector < SectCount);
ClearLine ();
cprintf ("\rSuccessfully copied %d Sectors\r\n", SectCount);
free (Buffer);
dio_close (Source);
dio_close (Target);
return EXIT_SUCCESS;
}
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