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/* dla2csv.c - convert dla.xex save files to CSV.
Rather bloated and slow by Atari standards. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <sys/types.h>
#include <dirent.h>
#ifdef __CC65__
#ifndef __ATARI__
#error Unsupported cc65 machine type: only "-t atari" is supported.
#endif
#endif
#include "dlaver.h"
#define HEIGHT 170
#define WIDTH 256
/* cc65 doesn't fold constants, it won't let us do this:
#define INBUF_SIZE (WIDTH * HEIGHT)
...it has to be a *constant*. */
#define INBUF_SIZE 5440
#define STRINGBUF_SIZE 256
#define PRINT_ID printf("DLA to CSV converter v" VERSION ".\n")
#ifdef __ATARI__
#include <atari.h>
/* cc65 doesn't "localize" \b to the Atari backspace character, so: */
#define BS CH_DEL
/* On the Atari, we should show Atari-style error messages, including
the familiar error number.
Another reason to do this: on the Atari, perror() says "Bad file number"
instead of "No space left on device", if the disk fills up due
to fprintf().
On modern platforms, just use perror(). */
#define PERROR(x) atari_perror(x)
void atari_perror(char *msg) {
printf("%s: Error %d: %s\n", msg, _oserror, _stroserror(_oserror));
}
/* cc65 doesn't play nice with the Break key on the Atari. It
works as expected during disk I/O, but if you press it while
printing to stdout or reading from stdin, the program freezes.
so call disable_break() at startup, then wrap disk I/O in
enable_break() and disable_break(). */
void enable_break() {
OS.pokmsk = POKEY_WRITE.irqen = POKEY_READ.irqst | 0x80;
}
void disable_break() {
OS.pokmsk = POKEY_WRITE.irqen = POKEY_READ.irqst & 0x7f;
}
void init_console(void) {
/* cc65's startup code turns off caps lock. turn it back on,
since we're typing DOS filenames. in BASIC this would be:
POKE 702,64 */
OS.shflok = 0x40;
/* also, cc65 sets APPMHI to $bc1f (last byte before the GR.0
display list). which causes the atari to lock up when Reset
is pressed. I can't believe this is useful behaviour... */
OS.appmhi = 0;
/* clear the screen */
putchar(CH_CLR);
}
void print_banner(void) {
int i;
PRINT_ID;
printf("\n"
"At any filename prompt, you may:\n" );
printf(
"- Press Return, to exit this program.\n");
printf(
"- Enter a number, to get a directory of\n"
" that drive.");
/* be nice to emulator users. */
for(i = 0; i < 12; i++) {
if(OS.hatabs[i].id == 'H') {
printf(" Use 0 for \"H:\".");
break;
}
}
printf("\n");
}
/* Show disk directory, in a 3-column layout.
drive is an ASCII digit, e.g. 0x31 is drive 1. */
void show_dir(char drive) {
static char dirspec[16];
char device = 'D';
DIR *dir;
struct dirent *ent;
int column = 0;
if(drive == '0') {
drive++;
device = 'H';
}
sprintf(dirspec, "%c%c:*.*", device, drive);
if(!(dir = opendir(dirspec))) {
dirspec[2] = '\0';
PERROR(dirspec);
return;
}
while((ent = readdir(dir))) {
printf("%-13s", ent->d_name);
if(++column == 3) {
column = 0;
putchar('\n');
}
}
closedir(dir);
if(column) putchar('\n');
}
#else
/* non-Atari is assumed to be POSIX (and not something like
Commodore or Apple II). */
#define BS '\b'
#define PERROR(x) perror(x)
#define enable_break() noop()
#define disable_break() noop()
#define init_console() noop()
void noop(void) { }
void print_banner(void) {
PRINT_ID;
}
#endif
char inbuf[INBUF_SIZE];
char stringbuf[STRINGBUF_SIZE];
FILE *inf, *outf;
/* We can't use string literal syntax, cc65 "helpfully" turns "\x0a"
into an Atari 0x9b EOL character. Numeric constants are left alone. */
char a8eol[] = { 0x9b, 0x00, 0x00 };
char uxeol[] = { 0x0a, 0x00, 0x00 };
char mseol[] = { 0x0d, 0x0a, 0x00 };
char *eoltypes[][2] = {
{ "Atari ($9B)", a8eol },
{ "Unix (\\n)", uxeol },
{ "MS (\\r\\n)", mseol },
{ NULL, NULL }
};
/* Read a string from stdin (E: on the Atari).
Exit on EOF (or Break key on the Atari, except we disable it).
On Linux, EOF is the ^D character, and this works.
On the Atari, EOF is ^3... On DOS 2.0S, we end up back at the DUP
menu... but SpartaDOS 3.2d locks up with a black screen. So don't
document ctrl-3 as a way to exit the program (too bad), and just
hope the user never presses it.
*/
void readstring(void) {
char *result;
memset(stringbuf, 0, STRINGBUF_SIZE);
result = fgets(stringbuf, STRINGBUF_SIZE - 1, stdin);
if(result == NULL) {
enable_break();
exit(1);
}
}
int prompt_yn(char *prompt, int default_y) {
char *yn = "y/N";
if(default_y) yn = "Y/n";
printf("%s[%s]? ", prompt, yn);
fflush(stdout);
readstring();
switch(stringbuf[0]) {
case 'y':
case 'Y':
return 1;
break;
case 'n':
case 'N':
return 0;
break;
default:
break;
}
return default_y;
}
/* Prompt for a filename, try to open it. If there's an error,
show error message and retry. Will not return until it
opens the file. */
FILE *prompt_filename(const char *name, const char *mode) {
FILE *f = NULL;
putchar('\n');
while(f == NULL) {
printf("%s file: ", name);
fflush(stdout);
readstring();
stringbuf[strlen(stringbuf) - 1] = '\0'; /* kill trailing \n */
if(strlen(stringbuf) == 0) {
if(prompt_yn("Exit program", 0)) {
enable_break();
exit(0);
}
continue;
}
#ifdef __ATARI__
/* if the user enters a single digit, show directory of that drive. */
if(isdigit(stringbuf[0])) {
show_dir(stringbuf[0]);
continue;
}
/* if there's no device spec (D: or D1: etc), prepend D: */
if(!strchr(stringbuf, ':')) {
memmove(stringbuf+2, stringbuf, strlen(stringbuf) + 1);
stringbuf[0] = 'D';
stringbuf[1] = ':';
}
#endif
enable_break();
f = fopen(stringbuf, mode);
disable_break();
if(!f) PERROR(stringbuf);
}
return f;
}
/* Prompt for and read EOL type, retry if needed. Will not return
until a valid number was entered. */
char *prompt_eol(void) {
int i;
putchar('\n');
for(i = 0; eoltypes[i][0] != NULL; i++) {
printf("%d:%s ", i + 1, eoltypes[i][0]);
}
putchar('\n');
i = -1;
while(i == -1) {
printf("Line ending type[1]? ");
fflush(stdout);
readstring();
if(stringbuf[0] == '\n') {
i = 0;
} else {
i = stringbuf[0] - 49; /* ASCII 1-3 => 0-2 */
if(i < 0 || i > 2)
i = -1;
}
}
return eoltypes[i][1];
}
void backspace3(void) {
putchar(BS);
putchar(BS);
putchar(BS);
}
/* check_dla() returns 1 if all is well, 0 if there's a problem. */
int check_dla(int bytes) {
int i, ok = 1;
/* warn if the file size is wrong... */
if(bytes < INBUF_SIZE) {
printf("Warning: File too short!\n");
ok = 0;
} else if(fgetc(inf) != EOF) {
printf("Warning: File too long!\n");
ok = 0;
} else {
printf("File size is OK.\n");
}
fclose(inf);
/* a DLA file never has non-zero bytes at the beginning. */
for(i = 0; i < 32; i++) {
if(inbuf[i]) {
printf("Warning: File doesn't look like a DLA!\n");
ok = 0;
break;
}
}
return ok;
}
int read_file(void) {
int bytes;
/* in case of short read on 2nd or later conversion: */
memset(inbuf, 0, INBUF_SIZE);
/* read whole input file into memory */
inf = prompt_filename("Input DLA", "rb");
printf("Reading...");
fflush(stdout);
enable_break();
bytes = fread(inbuf, 1, INBUF_SIZE, inf);
disable_break();
if(bytes <= 0) {
PERROR(stringbuf);
}
return bytes;
}
/* convert() returns the number of particles on success, 0 on failure. */
int convert(char *eol) {
char *inp;
int x, y, xmask, particles;
outf = prompt_filename("Output CSV", "wb");
#ifdef __ATARI__
printf("Press Ctrl-C to abort conversion.\n");
#endif
printf("\nConverting... ");
fflush(stdout);
/* CSV file header row (column names) */
fprintf(outf, "x,y%s", eol);
inp = inbuf;
xmask = 0x80;
particles = 0;
/* write output file one line at a time */
/* loop over all the pixels, by row, then column. this
loop is rather slow. */
for(y = 0; y < HEIGHT; y++) {
#ifdef __ATARI__
/* check for ^C */
if(OS.ch == KEY_C | KEY_CTRL) {
printf("\nUser abort!\n");
fclose(outf);
remove(stringbuf);
OS.ch = KEY_NONE;
return 0;
}
#endif
backspace3();
printf("%02d%%", y * 100 / HEIGHT); /* percentage */
fflush(stdout);
for(x = 0; x < WIDTH; x++) {
if(*inp & xmask) {
if(fprintf(outf, "%d,%d%s", x, y, eol) < 0) {
putchar('\n');
PERROR(stringbuf);
fclose(outf);
remove(stringbuf);
return 0;
}
particles++;
}
xmask >>= 1;
if(!xmask) {
xmask = 0x80;
inp++;
}
}
}
fclose(outf);
return particles;
}
int main(int argc, char **argv) {
char *eol;
int done, result = 0;
init_console();
print_banner();
while(1) {
disable_break();
result = read_file();
if(result <= 0) continue;
printf("Read %d bytes.\n", result);
/* if anything looks wrong, we shouldn't proceed... but the user
is boss, so give him the choice to shoot himself in the foot. */
if(!check_dla(result)) {
if(!prompt_yn("Try to convert anyway", 0))
continue;
}
eol = prompt_eol();
/* convert in a loop. in case of write error, this allows retry
without re-reading the input file. */
done = 0;
while(!done) {
result = convert(eol);
if(result) {
done = 1;
backspace3();
printf("100%%\n%d particles.\n", result);
} else {
if(!prompt_yn("Conversion failed, try again", 1))
done = 1;
}
}
if(!prompt_yn("\nConvert another file", 1))
break;
}
enable_break();
exit(0);
}
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