Apple-2-Tools
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a2tools
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a2tools/a2tools.c

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/*
a2tools - utilities for transferring data between Unix and Apple II
DOS 3.3 disk images.
Copyright (C) 1998, 2001 Terry Kyriacopoulos
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., 675 Mass Ave, Cambridge, MA 02139, USA.
Author's e-mail address: terryk@echo-on.net
-------------------------------------------------------------------
Modified to be more portable: Unix specifics are marked as such.
ANSI-C is assumed, code is now acceptable to C++ as well,
type definitions are straighetend up, unused variables are removed,
casts are added when required by C++.
Paul Schlyter, 2001-03-20, pausch@saaf.se
-------------------------------------------------------------------
Improvements to accomodate MS-DOS have been made:
- code fixed to work properly on a 16-bit platform
- conditional compilation used to select OS-specific code
automatically
- user interface is now more OS-specific:
- argv[0] command selection for UNIX, argv[1] for DOS
- stdin/stdout forbidden on binary data in DOS
- optional source/destination pathnames for in/out commands
- improved documentation
Terry Kyriacopoulos, April 8, 2001 terryk@echo-on.net
*/
#ifndef UNIX
#ifdef __unix__
#define UNIX
#endif
#endif
#ifndef DOS
#ifdef __MSDOS__
#define DOS
#endif
#endif
#ifndef UNIX
#ifndef DOS
#error Please define macro UNIX or DOS.
#endif
#else
#ifdef DOS
#error Both macros UNIX and DOS are defined!
#endif
#endif
#ifdef DOS
const char *const DOS_HelpText =
"\n"
"a2tools - utility for transferring files from/to Apple II .dsk images\n"
" Copyright (C) 1998, 2001 Terry Kyriacopoulos\n"
"\n"
" Usage:\n"
"\n"
" a2 dir <dsk_image>\n"
" a2 out [-r] <dsk_image> <a2_name> [<dest_file>]\n"
" a2 in [-r] <type>[.<hex_addr>] <dsk_image> <a2_name> [<source>]\n"
" a2 del <dsk_image> <a2_name>\n"
"\n"
" -r (raw mode): Suppress all filetype-dependent processing\n"
" and copy everything as-is.\n"
"\n"
" <type>: one of t,i,a,b,s,r,x,y (do not use -)\n"
" <hex_addr>: base address in hex, for type B (binary)\n"
"\n"
" Quotes may be used around names with spaces, use \\\"\n"
" to include a quote in the name.\n"
;
#endif
/* Apple Integer and AppleSoft BASIC tokens. */
const char *const Integer_tokens[] = {
" HIMEM:", "", " _ ", ":",
" LOAD ", " SAVE ", " CON ", " RUN ",
" RUN ", " DEL ", ",", " NEW ",
" CLR ", " AUTO ", ",", " MAN ",
" HIMEM:", " LOMEM:", "+", "-",
"*", "/", "=", "#",
">=", ">", "<=", "<>",
"<", " AND ", " OR ", " MOD ",
" ^ ", "+", "(", ",",
" THEN ", " THEN ", ",", ",",
"\"", "\"", "(", "!",
"!", "(", " PEEK ", " RND ",
" SGN ", " ABS ", " PDL ", " RNDX ",
"(", "+", "-", " NOT ",
"(", "=", "#", " LEN(",
" ASC(", " SCRN(", ",", "(",
"$", "$", "(", ",",
",", ";", ";", ";",
",", ",", ",", " TEXT ",
" GR ", " CALL ", " DIM ", " DIM ",
" TAB ", " END ", " INPUT ", " INPUT ",
" INPUT ", " FOR ", "=", " TO ",
" STEP ", " NEXT ", ",", " RETURN ",
" GOSUB ", " REM ", " LET ", " GOTO ",
" IF ", " PRINT ", " PRINT ", " PRINT ",
" POKE ", ",", " COLOR=", " PLOT ",
",", " HLIN ", ",", " AT ",
" VLIN ", ",", " AT ", " VTAB ",
"=", "=", ")", ")",
" LIST ", ",", " LIST ", " POP ",
" NODSP ", " NODSP ", " NOTRACE ", " DSP ",
" DSP ", " TRACE ", " PR#", " IN#"
};
const char *const Applesoft_tokens[] = {
" END ", " FOR ", " NEXT ", " DATA ",
" INPUT ", " DEL ", " DIM ", " READ ",
" GR ", " TEXT ", " PR#", " IN#",
" CALL ", " PLOT ", " HLIN ", " VLIN ",
" HGR2 ", " HGR ", " HCOLOR=", " HPLOT ",
" DRAW ", " XDRAW ", " HTAB ", " HOME ",
" ROT=", " SCALE=", " SHLOAD ", " TRACE ",
" NOTRACE ", " NORMAL ", " INVERSE ", " FLASH ",
" COLOR=", " POP ", " VTAB ", " HIMEM:",
" LOMEM:", " ONERR ", " RESUME ", " RECALL ",
" STORE ", " SPEED=", " LET ", " GOTO ",
" RUN ", " IF ", " RESTORE ", " & ",
" GOSUB ", " RETURN ", " REM ", " STOP ",
" ON ", " WAIT ", " LOAD ", " SAVE ",
" DEF ", " POKE ", " PRINT ", " CONT ",
" LIST ", " CLEAR ", " GET ", " NEW ",
" TAB(", " TO ", " FN ", " SPC(",
" THEN ", " AT ", " NOT ", " STEP ",
" + ", " - ", " * ", " / ",
" ^ ", " AND ", " OR ", " > ",
" = ", " < ", " SGN ", " INT ",
" ABS ", " USR ", " FRE ", " SCRN(",
" PDL ", " POS ", " SQR ", " RND ",
" LOG ", " EXP ", " COS ", " SIN ",
" TAN ", " ATN ", " PEEK ", " LEN ",
" STR$ ", " VAL ", " ASC ", " CHR$ ",
" LEFT$ ", " RIGHT$ ", " MID$ ", " ",
" SYNTAX ", " RETURN WITHOUT GOSUB ",
" OUT OF DATA ", " ILLEGAL QUANTITY ",
" OVERFLOW ", " OUT OF MEMORY ",
" UNDEF'D STATEMENT ", " BAD SUBSCRIPT ",
" REDIM'D ARRAY ", " DIVISION BY ZERO ",
" ILLEGAL DIRECT ", " TYPE MISMATCH ",
" STRING TOO LONG ", " FORMULA TOO COMPLEX ",
" CAN'T CONTINUE ", " UNDEF'D FUNCTION ",
" ERROR \a", "", "", ""
};
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#define FILETYPE_T 0x00
#define FILETYPE_I 0x01
#define FILETYPE_A 0x02
#define FILETYPE_B 0x04
#define FILETYPE_S 0x08
#define FILETYPE_R 0x10
#define FILETYPE_X 0x20
#define FILETYPE_Y 0x40
/* X - "new A", Y - "new B" */
#define MAX_HOPS 560
#define VTOC_CHK_NO 6
const unsigned char vtoc_chk_offset[VTOC_CHK_NO] =
{ 0x03, 0x27, 0x34, 0x35, 0x36, 0x37};
const unsigned char vtoc_chk_value[VTOC_CHK_NO] =
{ 0x03, 0x7a, 0x23, 0x10, 0x00, 0x01};
FILE *from_file=NULL, *to_file=NULL, *image_fp=NULL;
char *extfilename, *extfilemode;
unsigned char padded_name[30], dir_entry_data[35];
unsigned char vtocbuffer[256];
unsigned int begun, baseaddress, rawmode, filetype, new_sectors;
unsigned long dir_entry_pos;
void quit(int exitcode, char *exitmsg) {
fprintf(stderr,"%s",exitmsg);
if (image_fp) fclose(image_fp);
if (from_file) fclose(from_file);
if (to_file) fclose(to_file);
exit(exitcode);
}
int seek_sect (unsigned int track, unsigned int sector) {
if (track >= 35 || sector >= 16)
quit(1,"seek on .dsk out of range.\n");
return fseek(image_fp, (track*16uL+sector)*256, SEEK_SET);
}
void read_sect (int track, int sector, unsigned char buffer[256]) {
int i;
seek_sect(track, sector);
for (i=0; i<256; i++) buffer[i]=fgetc(image_fp);
}
void write_sect (int track, int sector, unsigned char buffer[256]) {
int i;
seek_sect(track, sector);
for (i=0; i<256; i++) fputc(buffer[i],image_fp);
}
int dir_do (int (*what_to_do)(unsigned char *) ) {
unsigned char buffer[256];
unsigned int cur_trk, cur_sec, i, found, hop;
hop=found=0;
buffer[1]=vtocbuffer[1];
buffer[2]=vtocbuffer[2];
while(++hop < MAX_HOPS && !found && (buffer[1] || buffer[2])) {
cur_trk=buffer[1];
cur_sec=buffer[2];
read_sect (buffer[1],buffer[2],buffer);
i=0x0b;
while(i<=0xdd && !(found=(*what_to_do)(&buffer[i]))) i+=35;
if (found) dir_entry_pos=(cur_trk*16uL+cur_sec)*256+i;
}
if (hop >= MAX_HOPS) quit(2,"\n***Corrupted directory\n\n");
return found;
}
int dir_find_name(unsigned char *buffer) {
int j;
j=0;
if (buffer[0] == 0xff || buffer[3] == 0) return 0;
while(j<30 && padded_name[j]==(buffer[j+3] & 0x7f)) j++;
if (j != 30) return 0;
for (j=0; j<35; j++) dir_entry_data[j]=buffer[j];
return 1;
}
int dir_find_space(unsigned char *buffer) {
return (buffer[0] == 0xff || buffer[3] ==0);
}
int dir_print_entry(unsigned char *buffer) {
int j;
if (buffer[0]!=0xff && buffer[3]!=0) {
/* entry is present */
printf(" ");
if (buffer[2] & 0x80) printf("*"); else printf(" ");
switch(buffer[2] & 0x7f) {
case FILETYPE_T : printf("T"); break;
case FILETYPE_I : printf("I"); break;
case FILETYPE_A : printf("A"); break;
case FILETYPE_B : printf("B"); break;
case FILETYPE_S : printf("S"); break;
case FILETYPE_R : printf("R"); break;
case FILETYPE_X : printf("X"); break;
case FILETYPE_Y : printf("Y"); break;
default : printf("?");
}
printf(" %03u ",buffer[33]+buffer[34]*256u);
for (j=3; j<33; j++)
printf("%c",(buffer[j] & 0x7f));
printf("\n");
}
return 0;
}
int preproc (int procmode) {
/* procmode: 0 - raw, 1 - text, 2 -binary */
static unsigned long bytepos, lengthspec_pos;
static int c;
unsigned int sect_pos;
sect_pos=0;
if (!begun) {
begun = 1;
bytepos = 0;
c=fgetc(from_file);
if (procmode == 2) {
fputc((baseaddress & 0xff),image_fp);
fputc((baseaddress >> 8),image_fp);
/* we don't know the length now, so save the spot in the image */
lengthspec_pos=ftell(image_fp);
fputc(0xff,image_fp);
fputc(0xff,image_fp);
sect_pos = 4;
}
}
while (c != EOF && sect_pos < 256) {
if (procmode == 1) {
if ((c & 0x7f) == '\n') c = '\r';
c |= 0x80;
}
fputc(c,image_fp);
c=fgetc(from_file);
sect_pos++;
bytepos++;
}
while (sect_pos++ < 256) fputc(0,image_fp);
if (c == EOF && procmode == 2) {
/* now we know the length */
fseek(image_fp, lengthspec_pos, SEEK_SET);
fputc((bytepos & 0xff),image_fp);
fputc((bytepos >> 8),image_fp);
}
return (c == EOF);
}
void new_sector(unsigned int *track, unsigned int *sector) {
/* find a free sector, quit if no more */
unsigned int byteoffset, bitmask;
int lasttrack, cur_track, cur_sector, direction;
/* force sane values, in case vtoc contains garbage */
if (vtocbuffer[0x31]==1) direction=1; else direction=-1;
cur_track=lasttrack=vtocbuffer[0x30] % 35u;
cur_sector=15;
for (;;) {
byteoffset=0x39+(cur_track<<2)-(cur_sector>>3&1);
bitmask=(1 <<(cur_sector & 0x07));
if (vtocbuffer[byteoffset] & bitmask) {
vtocbuffer[byteoffset]&=0xff^bitmask;
break;
}
else if (!cur_sector--) {
cur_sector=15;
cur_track+=direction;
if (cur_track >= 35) {
cur_track=17;
direction=-1;
}
else if (cur_track < 0) {
cur_track=18;
direction=1;
}
if (cur_track==lasttrack) quit(3,"Disk Full.\n");
}
}
*track=vtocbuffer[0x30]=cur_track;
*sector=cur_sector;
vtocbuffer[0x31]=direction % 256u;
new_sectors++;
}
void free_sector(int track, int sector) {
vtocbuffer[0x39+(track<<2)-(sector>>3&1)]|=1<<(sector&0x07);
}
void postproc_B (void) {
static unsigned int filelength, bytepos;
unsigned int sect_pos;
sect_pos=0;
if (!begun) {
begun = 1;
bytepos = 0;
fgetc(image_fp); /* Ignore 2 byte base address */
fgetc(image_fp);
filelength= fgetc(image_fp) + (fgetc(image_fp) * 256u);
sect_pos = 4;
}
while (bytepos < filelength && sect_pos < 256) {
fputc(fgetc(image_fp),to_file);
sect_pos++;
bytepos++;
}
}
void postproc_A (void) {
static unsigned int bufstat, tokens_left, lastspot;
static unsigned char lineheader[4];
unsigned int sect_pos, c;
sect_pos=0;
if (!begun) { /* first sector, initialize */
begun = 1;
fgetc(image_fp); /* ignore the length data, we use */
fgetc(image_fp); /* null line pointer as EOF */
sect_pos = 2;
lastspot = 0x0801; /* normal absolute beginning address */
tokens_left = bufstat = 0;
}
while(lastspot && sect_pos < 256) {
if (!tokens_left && !bufstat) bufstat = 4;
while (bufstat > 0 && sect_pos < 256) {
lineheader[4-bufstat]=fgetc(image_fp);
sect_pos++;
bufstat--;
}
if (!tokens_left && !bufstat &&
(lastspot=lineheader[0]+lineheader[1]*256u)) {
tokens_left = 1;
fprintf(to_file,"\n");
fprintf(to_file," %u ",lineheader[2]+lineheader[3]*256u);
}
while (tokens_left && lastspot && sect_pos < 256) {
if ((tokens_left=c=fgetc(image_fp)) & 0x80)
fprintf(to_file,"%s",Applesoft_tokens[(c & 0x7f)]);
else if (c) fprintf(to_file,"%c",c);
sect_pos++;
}
}
if (!lastspot) fprintf(to_file,"\n\n");
}
void postproc_I (void) {
static unsigned int filelength, bytepos;
static unsigned int bufstat, inputmode, quotemode, varmode;
static unsigned char numbuf[3];
unsigned int sect_pos, c;
sect_pos=0;
if (!begun) { /* first sector, initialize */
begun = 1;
filelength = fgetc(image_fp) + (fgetc(image_fp) * 256u);
sect_pos = 2;
bytepos = inputmode = bufstat = quotemode = varmode = 0;
}
/* inputmode: 0 - header, 1 - integer, 2 - tokens */
/* varmode: 1 means we are in the middle of an identifier */
while(bytepos < filelength && sect_pos < 256) {
if (inputmode < 2 && !bufstat) bufstat = 3 - inputmode;
while (bufstat > 0 && bytepos < filelength && sect_pos < 256) {
numbuf[3-bufstat]=fgetc(image_fp);
sect_pos++;
bytepos++;
bufstat--;
}
if (!bufstat && inputmode == 0) {
fprintf(to_file,"\n");
fprintf(to_file,"%5u ",numbuf[1]+(numbuf[2]*256u));
inputmode = 2;
}
if (!bufstat && inputmode == 1) {
fprintf(to_file,"%u",numbuf[1]+(numbuf[2]*256u));
inputmode = 2;
}
while (inputmode == 2 && bytepos < filelength && sect_pos < 256) {
c=fgetc(image_fp);
sect_pos++;
bytepos++;
/* 0x28: open quote, 0x29: close quote, 0x5d: REM token */
if (c == 0x28 || c == 0x5d) quotemode = 1;
if (c == 0x29) quotemode = 0;
/* Look for integer, unless in comment, string, or identifier */
if (!quotemode && !varmode && c >= 0xb0 && c <= 0xb9)
inputmode = 1;
else {
/* Identifiers begin with letter, may contain digit */
varmode = (c >= 0xc1 && c <= 0xda) ||
((c >= 0xb0 && c <= 0xb9) && varmode);
if (c == 0x01) inputmode = quotemode = 0;
else if (c & 0x80) fprintf(to_file,"%c",(c & 0x7f));
else fprintf(to_file,"%s",Integer_tokens[c]);
}
}
}
if (bytepos >= filelength) fprintf(to_file,"\n\n");
}
void postproc_T (void) {
static unsigned int not_eof;
unsigned int sect_pos, c;
sect_pos=0;
if (!begun) begun = not_eof = 1;
while (not_eof && sect_pos < 256 &&
(not_eof=c=fgetc(image_fp))) {
c &= 0x7f;
if (c == '\r') c='\n';
fputc(c,to_file);
sect_pos++;
}
}
void postproc_raw (void) {
unsigned int sect_pos;
for (sect_pos=0; sect_pos < 256; sect_pos++)
fputc(fgetc(image_fp),to_file);
}
void a2ls (void) {
unsigned int trkmap, free_sect, i, j;
free_sect = 0;
/* count the free sectors */
for (i=0x38; i<=0xc0; i+=4) {
trkmap=vtocbuffer[i]*256u + vtocbuffer[i+1];
for (j=0; j<16; j++) free_sect += ((trkmap & (1<<j))!=0);
}
printf("\nDisk Volume %u, Free Blocks: %u\n\n",
vtocbuffer[0x06],free_sect);
dir_do(dir_print_entry);
printf("\n");
}
void a2rm (void) {
unsigned char listbuffer[256];
unsigned int hop, next_trk, next_sec, i;
if (!dir_do(dir_find_name)) quit(4,"File not found.\n");
hop = begun = 0;
next_trk=dir_entry_data[0];
next_sec=dir_entry_data[1];
fseek(image_fp, dir_entry_pos, SEEK_SET);
fputc(0xff,image_fp); /* mark as deleted */
while(++hop < MAX_HOPS && (next_trk || next_sec)) {
read_sect(next_trk, next_sec, listbuffer);
free_sector(next_trk, next_sec);
next_trk=listbuffer[1];
next_sec=listbuffer[2];
for (i=0x0c; i <=0xfe; i+=2)
if (listbuffer[i] || listbuffer[i+1])
free_sector(listbuffer[i],listbuffer[i+1]);
}
if (hop >= MAX_HOPS) quit(5,"Corrupted sector list\n\n");
write_sect(0x11, 0, vtocbuffer);
}
void a2out (void) {
unsigned char listbuffer[256];
unsigned int hop, next_trk, next_sec, i, j;
void (*postproc_function)(void);
if (!dir_do(dir_find_name)) quit(6,"File not found.\n");
hop = begun = 0;
next_trk=dir_entry_data[0];
next_sec=dir_entry_data[1];
filetype=(dir_entry_data[2] & 0x7f);
if (filetype == FILETYPE_T) postproc_function= postproc_T;
else if (filetype == FILETYPE_B) postproc_function= postproc_B;
else if (filetype == FILETYPE_A) postproc_function= postproc_A;
else if (filetype == FILETYPE_I) postproc_function= postproc_I;
else if (!rawmode)
quit(7,"File type supported in raw mode only.\n");
if (rawmode) postproc_function= postproc_raw;
#ifdef DOS
extfilemode="w";
if (rawmode || filetype == FILETYPE_B) {
extfilemode="wb";
if (to_file)
quit(8,"stdout not allowed for binary output.\n");
}
#else
extfilemode="w";
#endif
if (!to_file && !(to_file=fopen(extfilename,extfilemode))) {
perror(extfilename);
quit(9,"");
}
while(++hop < MAX_HOPS && (next_trk || next_sec)) {
read_sect(next_trk, next_sec, listbuffer);
next_trk=listbuffer[1];
next_sec=listbuffer[2];
for (i=0x0c; i <= 0xfe; i+=2)
if (!listbuffer[i] && !listbuffer[i+1]) {
if (filetype != FILETYPE_T || !rawmode) {
next_trk=next_sec=0;
break;
}
else for (j=0; j<256; j++) fputc(0,to_file);
}
else {
++hop;
seek_sect(listbuffer[i],listbuffer[i+1]);
(*postproc_function) ();
}
}
if (hop >= MAX_HOPS) quit(10,"Corrupted sector list\n\n");
fclose(to_file);
}
void a2in (void) {
unsigned char listbuffer[256], databuffer[256];
unsigned int i, curlist_trk, curlist_sec, listentry_pos, list_no;
unsigned int curdata_trk, curdata_sec, procmode;
unsigned int newlist_trk, newlist_sec;
int c;
new_sectors=list_no=procmode=0;
if (!rawmode) {
if (filetype==FILETYPE_T) procmode=1;
else if (filetype==FILETYPE_B) procmode=2;
else quit(11,"This type is supported only in raw mode.\n");
}
#ifdef DOS
extfilemode="r";
if (procmode !=1) {
extfilemode="rb";
if (from_file)
quit(12,"stdin not allowed for binary input.\n");
}
#else
extfilemode="r";
#endif
if (!from_file && !(from_file=fopen(extfilename,extfilemode))) {
perror(extfilename);
quit(13,"");
}
if (dir_do(dir_find_name)) quit(14,"File exists.\n");
if (!dir_do(dir_find_space)) quit(15,"No space in directory.\n");
if (padded_name[0] < 'A')
quit(16,"Bad first filename character, must be >= 'A'.\n");
for (i=0;i<30;i++)
if (padded_name[i]==',')
quit(17,"Filename must not contain a comma.\n");
for (i=0;i<30;i++) dir_entry_data[i+3]=padded_name[i]|0x80;
dir_entry_data[2]=filetype;
new_sector(&curlist_trk,&curlist_sec);
dir_entry_data[0]=curlist_trk;
dir_entry_data[1]=curlist_sec;
for (i=0;i<256;i++) listbuffer[i]=0;
listentry_pos=0;
for (;;) {
if (!rawmode || filetype!=FILETYPE_T) {
new_sector(&curdata_trk,&curdata_sec);
listbuffer[0x0c+(listentry_pos<<1)]=curdata_trk;
listbuffer[0x0d+(listentry_pos<<1)]=curdata_sec;
seek_sect(curdata_trk,curdata_sec);
if (preproc(procmode)) break;
}
else {
/* Check for all-zero sectors for sparse T file */
for (i=0;i<256;i++) databuffer[i]=0;
i=0;
while((c=fgetc(from_file))!=EOF && i<256) databuffer[i++]=c;
while(i && !databuffer[i-1]) i--;
if (!i) {
listbuffer[0x0c+(listentry_pos<<1)]=0;
listbuffer[0x0d+(listentry_pos<<1)]=0;
}
else {
new_sector(&curdata_trk,&curdata_sec);
listbuffer[0x0c+(listentry_pos<<1)]=curdata_trk;
listbuffer[0x0d+(listentry_pos<<1)]=curdata_sec;
write_sect(curdata_trk,curdata_sec,databuffer);
}
if (c == EOF) break;
ungetc(c,from_file);
}
if (++listentry_pos >= 0x7a) {
new_sector(&newlist_trk,&newlist_sec);
listbuffer[1]=newlist_trk;
listbuffer[2]=newlist_sec;
write_sect(curlist_trk,curlist_sec,listbuffer);
curlist_trk=newlist_trk;
curlist_sec=newlist_sec;
for (i=0;i<256;i++) listbuffer[i]=0;
listentry_pos=0;
listbuffer[5]=(++list_no*0x7a) & 0xff;
listbuffer[6]=(list_no*0x7a) >> 8;
}
}
listbuffer[1]=listbuffer[2]=0;
write_sect(curlist_trk,curlist_sec,listbuffer);
write_sect(0x11, 0, vtocbuffer);
dir_entry_data[33]=new_sectors & 0xff;
dir_entry_data[34]=new_sectors >> 8;
fseek(image_fp,dir_entry_pos,SEEK_SET);
/* writing ff first ensures directory is always in a safe state */
fputc(0xff,image_fp);
for (i=1;i<35;i++) fputc(dir_entry_data[i],image_fp);
fseek(image_fp,dir_entry_pos,SEEK_SET);
fputc(dir_entry_data[0],image_fp);
fclose(from_file);
}
int main (int argc, char *argv[]) {
char *image_name, *image_mode, *a2_name, *basename, *typestr;
unsigned int i, bad_vtoc;
char *ls_cmd, *in_cmd, *out_cmd, *rm_cmd;
char *ls_hlp, *in_hlp, *out_hlp, *rm_hlp, *general_hlp;
int dos, x, image_rw=0;
void (*command)(void) = NULL;
#ifdef DOS
dos=1;
ls_cmd="dir";
in_cmd="in";
out_cmd="out";
rm_cmd="del";
ls_hlp=in_hlp=out_hlp=rm_hlp=general_hlp=(char *) DOS_HelpText;
#else
dos=0;
general_hlp="Invoke as a2ls, a2in, a2out, or a2rm.\n";
ls_cmd="a2ls";
ls_hlp="Usage: a2ls <disk_image>\n";
in_cmd="a2in";
in_hlp=
"Usage: a2in [-r] <type>[.<hex_addr>] <disk_image> <a2file> [<source>]\n";
out_cmd="a2out";
out_hlp="Usage: a2out [-r] <disk_image> <a2file> [<destination>]\n";
rm_cmd="a2rm";
rm_hlp="Usage: a2rm <disk_image> <a2file>\n";
#endif
baseaddress=0x2000; /* default, hi-res page 1 */
rawmode = begun = 0;
extfilename = a2_name = image_name = "";
#ifdef DOS
basename="";
if (argc >=2) basename=argv[1];
#else
basename=argv[0];
/* strip off any leading directories */
basename+=(i=strlen(basename));
while(i-->0 && *--basename!='/');
if (*basename=='/') basename++;
#endif
if (!strcmp(basename,ls_cmd)) {
if (argc !=2+dos) quit(18,ls_hlp);
else {
image_name=argv[1+dos];
image_rw=0;
command= a2ls;
}
}
else if (!strcmp(basename,out_cmd)) {
if (argc > 1+dos && !strcmp(argv[1+dos],"-r")) rawmode=1;
x=3+dos+rawmode;
if (argc != x && argc != x+1) quit(19,out_hlp);
else {
image_name=argv[x-2];
image_rw=0;
a2_name=argv[x-1];
if (argc-x)
extfilename=argv[x];
else
to_file=stdout;
command= a2out;
}
}
else if (!strcmp(basename,in_cmd)) {
if (argc > 1+dos && !strcmp(argv[1+dos],"-r")) rawmode=1;
x=4+dos+rawmode;
if (argc != x && argc != x+1) quit(20,in_hlp);
else {
typestr=argv[x-3];
image_name=argv[x-2];
image_rw=1;
a2_name=argv[x-1];
if (argc-x)
extfilename=argv[x];
else
from_file=stdin;
switch(typestr[0]|0x20) {
case 't': filetype=FILETYPE_T; break;
case 'i': filetype=FILETYPE_I; break;
case 'a': filetype=FILETYPE_A; break;
case 'b': filetype=FILETYPE_B; break;
case 's': filetype=FILETYPE_S; break;
case 'r': filetype=FILETYPE_R; break;
case 'x': filetype=FILETYPE_X; break;
case 'y': filetype=FILETYPE_Y; break;
default: quit(21,"<type>: one of t,i,a,b,s,r,x,y without -\n");
}
if (typestr[1]=='.') {
if (filetype==FILETYPE_B)
sscanf(&typestr[2],"%x",&baseaddress);
else quit(22,"Base address applicable to type B only.\n");
}
else if (typestr[1]!=0)
quit(23,"The only modifier for <type> is .<hex_addr>\n");
command= a2in;
}
}
else if (!strcmp(basename,rm_cmd)) {
if (argc != 3+dos) quit(24,rm_hlp);
else {
image_name=argv[1+dos];
image_rw=1;
a2_name=argv[2+dos];
command= a2rm;
}
}
else
quit(25,general_hlp);
if (image_rw==1) image_mode="rb+"; else image_mode="rb";
if (!(image_fp=fopen(image_name, image_mode)) || seek_sect(0, 0)) {
perror(image_name);
quit(26,"");
}
/* prepare source filename by padding blanks */
i=0;
while(i<30 && a2_name[i]) {
padded_name[i]=a2_name[i] & 0x7f;
i++;
}
while(i<30) padded_name[i++]=' ';
/* get VTOC and check validity */
read_sect(0x11, 0, vtocbuffer);
bad_vtoc=0;
for (i=0; i<VTOC_CHK_NO; i++)
bad_vtoc |= (vtocbuffer[vtoc_chk_offset[i]]!=vtoc_chk_value[i]);
if (bad_vtoc)
quit(27,"Not an Apple DOS 3.3 .dsk image.\n");
(*command)();
fclose(image_fp);
return 0;
}
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