| 1 |
/*
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| 2 |
* 1541fs.cpp - 1541 emulation in host file system
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| 3 |
*
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| 4 |
* Frodo (C) 1994-1997,2002-2003 Christian Bauer
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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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| 8 |
* 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 02111-1307 USA
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*/
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/*
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* Notes:
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* ------
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*
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* - If the directory is opened (file name "$"), a temporary file
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* with the structure of a 1541 directory file is created and
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* opened. It can then be accessed in the same way as all other
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* files.
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*
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* Incompatibilities:
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* ------------------
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*
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* - No "raw" directory reading
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* - No relative/sequential/user files
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* - Only "I" and "UJ" commands implemented
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*/
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#include "sysdeps.h"
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#include "1541fs.h"
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#include "IEC.h"
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#include "main.h"
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#include "Prefs.h"
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#ifdef __riscos__
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#include "ROlib.h"
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#endif
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// Access modes
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enum {
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FMODE_READ, FMODE_WRITE, FMODE_APPEND
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};
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// File types
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enum {
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FTYPE_PRG, FTYPE_SEQ
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};
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// Prototypes
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static bool match(char *p, char *n);
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/*
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* Constructor: Prepare emulation
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*/
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FSDrive::FSDrive(IEC *iec, char *path) : Drive(iec)
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{
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strcpy(orig_dir_path, path);
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dir_path[0] = 0;
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if (change_dir(orig_dir_path)) {
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for (int i=0; i<16; i++)
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file[i] = NULL;
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Reset();
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Ready = true;
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}
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}
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/*
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* Destructor
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*/
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FSDrive::~FSDrive()
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{
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if (Ready) {
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close_all_channels();
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Ready = false;
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}
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}
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/*
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* Change emulation directory
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*/
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bool FSDrive::change_dir(char *dirpath)
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{
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#ifndef __riscos__
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DIR *dir;
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if ((dir = opendir(dirpath)) != NULL) {
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closedir(dir);
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strcpy(dir_path, dirpath);
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strncpy(dir_title, dir_path, 16);
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return true;
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} else
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return false;
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#else
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int Info[4];
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if ((ReadCatalogueInfo(dirpath,Info) & 2) != 0) { // Directory or image file
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strcpy(dir_path, dirpath);
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strncpy(dir_title, dir_path, 16);
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return true;
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} else
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return false;
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#endif
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}
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/*
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* Open channel
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*/
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uint8 FSDrive::Open(int channel, char *filename)
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{
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set_error(ERR_OK);
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// Channel 15: Execute file name as command
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if (channel == 15) {
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execute_command(filename);
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return ST_OK;
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}
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// Close previous file if still open
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if (file[channel]) {
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fclose(file[channel]);
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file[channel] = NULL;
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}
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if (filename[0] == '$')
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return open_directory(channel, filename+1);
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if (filename[0] == '#') {
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set_error(ERR_NOCHANNEL);
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return ST_OK;
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}
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return open_file(channel, filename);
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}
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/*
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* Open file
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*/
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uint8 FSDrive::open_file(int channel, char *filename)
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{
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char plainname[NAMEBUF_LENGTH];
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int filemode = FMODE_READ;
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int filetype = FTYPE_PRG;
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bool wildflag = false;
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char *mode = "rb";
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convert_filename(filename, plainname, &filemode, &filetype, &wildflag);
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// Channel 0 is READ PRG, channel 1 is WRITE PRG
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if (!channel) {
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filemode = FMODE_READ;
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filetype = FTYPE_PRG;
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}
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if (channel == 1) {
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filemode = FMODE_WRITE;
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filetype = FTYPE_PRG;
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}
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// Wildcards are only allowed on reading
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if (wildflag) {
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if (filemode != FMODE_READ) {
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set_error(ERR_SYNTAX33);
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return ST_OK;
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}
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find_first_file(plainname);
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}
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// Select fopen() mode according to file mode
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switch (filemode) {
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case FMODE_READ:
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mode = "rb";
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break;
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case FMODE_WRITE:
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mode = "wb";
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break;
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case FMODE_APPEND:
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mode = "ab";
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break;
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}
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// Open file
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#ifndef __riscos__
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if (chdir(dir_path))
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set_error(ERR_NOTREADY);
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else if ((file[channel] = fopen(plainname, mode)) != NULL) {
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if (filemode == FMODE_READ) // Read and buffer first byte
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read_char[channel] = fgetc(file[channel]);
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} else
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set_error(ERR_FILENOTFOUND);
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chdir(AppDirPath);
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#else
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{
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char fullname[NAMEBUF_LENGTH];
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// On RISC OS make a full filename
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sprintf(fullname,"%s.%s",dir_path,plainname);
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if ((file[channel] = fopen(fullname, mode)) != NULL)
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{
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if (filemode == FMODE_READ)
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{
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read_char[channel] = fgetc(file[channel]);
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}
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}
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else
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{
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set_error(ERR_FILENOTFOUND);
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}
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}
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#endif
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return ST_OK;
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}
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/*
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* Analyze file name, get access mode and type
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*/
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void FSDrive::convert_filename(char *srcname, char *destname, int *filemode, int *filetype, bool *wildflag)
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{
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char *p, *q;
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int i;
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// Search for ':', p points to first character after ':'
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if ((p = strchr(srcname, ':')) != NULL)
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p++;
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else
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p = srcname;
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// Convert char set of the remaining string -> destname
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q = destname;
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for (i=0; i<NAMEBUF_LENGTH && (*q++ = conv_from_64(*p++, true)); i++) ;
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// Look for mode parameters seperated by ','
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p = destname;
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while ((p = strchr(p, ',')) != NULL) {
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// Cut string after the first ','
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*p++ = 0;
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switch (*p) {
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case 'p':
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*filetype = FTYPE_PRG;
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break;
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case 's':
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*filetype = FTYPE_SEQ;
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break;
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case 'r':
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*filemode = FMODE_READ;
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break;
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case 'w':
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*filemode = FMODE_WRITE;
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break;
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case 'a':
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*filemode = FMODE_APPEND;
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break;
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}
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}
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// Search for wildcards
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*wildflag = (strchr(destname, '?') != NULL) || (strchr(destname, '*') != NULL);
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}
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/*
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* Find first file matching wildcard pattern and get its real name
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*/
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// Return true if name 'n' matches pattern 'p'
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static bool match(char *p, char *n)
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{
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if (!*p) // Null pattern matches everything
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return true;
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do {
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if (*p == '*') // Wildcard '*' matches all following characters
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return true;
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if ((*p != *n) && (*p != '?')) // Wildcard '?' matches single character
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return false;
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p++; n++;
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} while (*p);
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return !*n;
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| 307 |
}
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void FSDrive::find_first_file(char *name)
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{
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| 311 |
#ifndef __riscos__
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DIR *dir;
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struct dirent *de;
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| 314 |
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// Open directory for reading and skip '.' and '..'
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if ((dir = opendir(dir_path)) == NULL)
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return;
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de = readdir(dir);
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while (de && (0 == strcmp(".", de->d_name) || 0 == strcmp("..", de->d_name)))
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de = readdir(dir);
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while (de) {
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// Match found? Then copy real file name
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if (match(name, de->d_name)) {
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strncpy(name, de->d_name, NAMEBUF_LENGTH);
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closedir(dir);
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return;
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}
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// Get next directory entry
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| 332 |
de = readdir(dir);
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}
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| 334 |
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closedir(dir);
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| 336 |
#else
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| 337 |
dir_env de;
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char Buffer[NAMEBUF_LENGTH];
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| 340 |
de.offset = 0; de.buffsize = NAMEBUF_LENGTH; de.match = name;
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do {
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de.readno = 1;
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| 343 |
if (ReadDirName(dir_path,Buffer,&de) != NULL)
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de.offset = -1;
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| 345 |
else if (de.offset != -1 && match(name,Buffer)) {
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strncpy(name, Buffer, NAMEBUF_LENGTH);
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return;
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| 348 |
}
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| 349 |
} while (de.readno > 0);
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| 350 |
#endif
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}
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| 353 |
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/*
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* Open directory, create temporary file
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*/
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uint8 FSDrive::open_directory(int channel, char *filename)
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| 359 |
{
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| 360 |
char buf[] = "\001\004\001\001\0\0\022\042 \042 00 2A";
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| 361 |
char str[NAMEBUF_LENGTH];
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char pattern[NAMEBUF_LENGTH];
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| 363 |
char *p, *q;
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| 364 |
int i;
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| 365 |
int filemode;
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| 366 |
int filetype;
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| 367 |
bool wildflag;
|
| 368 |
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| 369 |
#ifndef __riscos__
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| 370 |
DIR *dir;
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| 371 |
struct dirent *de;
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| 372 |
struct stat statbuf;
|
| 373 |
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| 374 |
// Special treatment for "$0"
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| 375 |
if (filename[0] == '0' && filename[1] == 0)
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| 376 |
filename += 1;
|
| 377 |
|
| 378 |
// Convert filename ('$' already stripped), filemode/type are ignored
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| 379 |
convert_filename(filename, pattern, &filemode, &filetype, &wildflag);
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| 380 |
|
| 381 |
// Open directory for reading and skip '.' and '..'
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| 382 |
if ((dir = opendir(dir_path)) == NULL) {
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| 383 |
set_error(ERR_NOTREADY);
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| 384 |
return ST_OK;
|
| 385 |
}
|
| 386 |
de = readdir(dir);
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| 387 |
while (de && (0 == strcmp(".", de->d_name) || 0 == strcmp("..", de->d_name)))
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| 388 |
de = readdir(dir);
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| 389 |
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| 390 |
// Create temporary file
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| 391 |
if ((file[channel] = tmpfile()) == NULL) {
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| 392 |
closedir(dir);
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| 393 |
return ST_OK;
|
| 394 |
}
|
| 395 |
|
| 396 |
// Create directory title
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| 397 |
p = &buf[8];
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| 398 |
for (i=0; i<16 && dir_title[i]; i++)
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| 399 |
*p++ = conv_to_64(dir_title[i], false);
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| 400 |
fwrite(buf, 1, 32, file[channel]);
|
| 401 |
|
| 402 |
// Create and write one line for every directory entry
|
| 403 |
while (de) {
|
| 404 |
|
| 405 |
// Include only files matching the pattern
|
| 406 |
if (match(pattern, de->d_name)) {
|
| 407 |
|
| 408 |
// Get file statistics
|
| 409 |
chdir(dir_path);
|
| 410 |
stat(de->d_name, &statbuf);
|
| 411 |
chdir(AppDirPath);
|
| 412 |
|
| 413 |
// Clear line with spaces and terminate with null byte
|
| 414 |
memset(buf, ' ', 31);
|
| 415 |
buf[31] = 0;
|
| 416 |
|
| 417 |
p = buf;
|
| 418 |
*p++ = 0x01; // Dummy line link
|
| 419 |
*p++ = 0x01;
|
| 420 |
|
| 421 |
// Calculate size in blocks (254 bytes each)
|
| 422 |
i = (statbuf.st_size + 254) / 254;
|
| 423 |
*p++ = i & 0xff;
|
| 424 |
*p++ = (i >> 8) & 0xff;
|
| 425 |
|
| 426 |
p++;
|
| 427 |
if (i < 10) p++; // Less than 10: add one space
|
| 428 |
if (i < 100) p++; // Less than 100: add another space
|
| 429 |
|
| 430 |
// Convert and insert file name
|
| 431 |
strcpy(str, de->d_name);
|
| 432 |
*p++ = '\"';
|
| 433 |
q = p;
|
| 434 |
for (i=0; i<16 && str[i]; i++)
|
| 435 |
*q++ = conv_to_64(str[i], true);
|
| 436 |
*q++ = '\"';
|
| 437 |
p += 18;
|
| 438 |
|
| 439 |
// File type
|
| 440 |
if (S_ISDIR(statbuf.st_mode)) {
|
| 441 |
*p++ = 'D';
|
| 442 |
*p++ = 'I';
|
| 443 |
*p++ = 'R';
|
| 444 |
} else {
|
| 445 |
*p++ = 'P';
|
| 446 |
*p++ = 'R';
|
| 447 |
*p++ = 'G';
|
| 448 |
}
|
| 449 |
|
| 450 |
// Write line
|
| 451 |
fwrite(buf, 1, 32, file[channel]);
|
| 452 |
}
|
| 453 |
|
| 454 |
// Get next directory entry
|
| 455 |
de = readdir(dir);
|
| 456 |
}
|
| 457 |
#else
|
| 458 |
dir_full_info di;
|
| 459 |
dir_env de;
|
| 460 |
unsigned char c;
|
| 461 |
|
| 462 |
// Much of this is very similar to the original
|
| 463 |
if ((filename[0] == '0') && (filename[1] == 0)) {filename++;}
|
| 464 |
|
| 465 |
// Concatenate dir_path and pattern in buffer pattern ==> read subdirs!
|
| 466 |
strcpy(pattern,dir_path); i = strlen(pattern); pattern[i++] = '.'; pattern[i] = 0;
|
| 467 |
convert_filename(filename, pattern + i, &filemode, &filetype, &wildflag);
|
| 468 |
p = pattern + i; q = p;
|
| 469 |
do {c = *q++; if (c == '.') p = q;} while (c >= 32);
|
| 470 |
*(p-1) = 0; // separate directory-path and pattern
|
| 471 |
if ((uint8)(*p) < 32) {*p = '*'; *(p+1) = 0;}
|
| 472 |
|
| 473 |
// We don't use tmpfile() -- problems involved!
|
| 474 |
DeleteFile(RO_TEMPFILE); // first delete it, if it exists
|
| 475 |
if ((file[channel] = fopen(RO_TEMPFILE,"wb+")) == NULL)
|
| 476 |
return(ST_OK);
|
| 477 |
de.offset = 0; de.buffsize = NAMEBUF_LENGTH; de.match = p;
|
| 478 |
|
| 479 |
// Create directory title - copied from above
|
| 480 |
p = &buf[8];
|
| 481 |
for (i=0; i<16 && dir_title[i]; i++)
|
| 482 |
*p++ = conv_to_64(dir_title[i], false);
|
| 483 |
fwrite(buf, 1, 32, file[channel]);
|
| 484 |
|
| 485 |
do {
|
| 486 |
de.readno = 1;
|
| 487 |
if (ReadDirNameInfo(pattern,&di,&de) != NULL)
|
| 488 |
de.offset = -1;
|
| 489 |
else if (de.readno > 0) { // don't have to check for match here
|
| 490 |
memset(buf,' ',31); buf[31] = 0; // most of this: see above
|
| 491 |
p = buf; *p++ = 0x01; *p++ = 0x01;
|
| 492 |
i = (di.length + 254) / 254; *p++ = i & 0xff; *p++ = (i>>8) & 0xff;
|
| 493 |
p++;
|
| 494 |
if (i < 10)
|
| 495 |
*p++ = ' ';
|
| 496 |
if (i < 100)
|
| 497 |
*p++ = ' ';
|
| 498 |
strcpy(str, di.name);
|
| 499 |
*p++ = '\"'; q = p;
|
| 500 |
for (i=0; (i<16 && str[i]); i++)
|
| 501 |
*q++ = conv_to_64(str[i], true);
|
| 502 |
*q++ = '\"'; p += 18;
|
| 503 |
if ((di.otype & 2) == 0) {
|
| 504 |
*p++ = 'P'; *p++ = 'R'; *p++ = 'G';
|
| 505 |
} else {
|
| 506 |
*p++ = 'D'; *p++ = 'I'; *p++ = 'R';
|
| 507 |
}
|
| 508 |
fwrite(buf, 1, 32, file[channel]);
|
| 509 |
}
|
| 510 |
} while (de.offset != -1);
|
| 511 |
#endif
|
| 512 |
|
| 513 |
// Final line
|
| 514 |
fwrite("\001\001\0\0BLOCKS FREE. \0\0", 1, 32, file[channel]);
|
| 515 |
|
| 516 |
// Rewind file for reading and read first byte
|
| 517 |
rewind(file[channel]);
|
| 518 |
read_char[channel] = fgetc(file[channel]);
|
| 519 |
|
| 520 |
#ifndef __riscos
|
| 521 |
// Close directory
|
| 522 |
closedir(dir);
|
| 523 |
#endif
|
| 524 |
|
| 525 |
return ST_OK;
|
| 526 |
}
|
| 527 |
|
| 528 |
|
| 529 |
/*
|
| 530 |
* Close channel
|
| 531 |
*/
|
| 532 |
|
| 533 |
uint8 FSDrive::Close(int channel)
|
| 534 |
{
|
| 535 |
if (channel == 15) {
|
| 536 |
close_all_channels();
|
| 537 |
return ST_OK;
|
| 538 |
}
|
| 539 |
|
| 540 |
if (file[channel]) {
|
| 541 |
fclose(file[channel]);
|
| 542 |
file[channel] = NULL;
|
| 543 |
}
|
| 544 |
|
| 545 |
return ST_OK;
|
| 546 |
}
|
| 547 |
|
| 548 |
|
| 549 |
/*
|
| 550 |
* Close all channels
|
| 551 |
*/
|
| 552 |
|
| 553 |
void FSDrive::close_all_channels(void)
|
| 554 |
{
|
| 555 |
for (int i=0; i<15; i++)
|
| 556 |
Close(i);
|
| 557 |
|
| 558 |
cmd_len = 0;
|
| 559 |
}
|
| 560 |
|
| 561 |
|
| 562 |
/*
|
| 563 |
* Read from channel
|
| 564 |
*/
|
| 565 |
|
| 566 |
uint8 FSDrive::Read(int channel, uint8 *byte)
|
| 567 |
{
|
| 568 |
int c;
|
| 569 |
|
| 570 |
// Channel 15: Error channel
|
| 571 |
if (channel == 15) {
|
| 572 |
*byte = *error_ptr++;
|
| 573 |
|
| 574 |
if (*byte != '\r')
|
| 575 |
return ST_OK;
|
| 576 |
else { // End of message
|
| 577 |
set_error(ERR_OK);
|
| 578 |
return ST_EOF;
|
| 579 |
}
|
| 580 |
}
|
| 581 |
|
| 582 |
if (!file[channel]) return ST_READ_TIMEOUT;
|
| 583 |
|
| 584 |
// Read one byte
|
| 585 |
*byte = read_char[channel];
|
| 586 |
c = fgetc(file[channel]);
|
| 587 |
if (c == EOF)
|
| 588 |
return ST_EOF;
|
| 589 |
else {
|
| 590 |
read_char[channel] = c;
|
| 591 |
return ST_OK;
|
| 592 |
}
|
| 593 |
}
|
| 594 |
|
| 595 |
|
| 596 |
/*
|
| 597 |
* Write to channel
|
| 598 |
*/
|
| 599 |
|
| 600 |
uint8 FSDrive::Write(int channel, uint8 byte, bool eoi)
|
| 601 |
{
|
| 602 |
// Channel 15: Collect chars and execute command on EOI
|
| 603 |
if (channel == 15) {
|
| 604 |
if (cmd_len >= 40)
|
| 605 |
return ST_TIMEOUT;
|
| 606 |
|
| 607 |
cmd_buffer[cmd_len++] = byte;
|
| 608 |
|
| 609 |
if (eoi) {
|
| 610 |
cmd_buffer[cmd_len] = 0;
|
| 611 |
cmd_len = 0;
|
| 612 |
execute_command(cmd_buffer);
|
| 613 |
}
|
| 614 |
return ST_OK;
|
| 615 |
}
|
| 616 |
|
| 617 |
if (!file[channel]) {
|
| 618 |
set_error(ERR_FILENOTOPEN);
|
| 619 |
return ST_TIMEOUT;
|
| 620 |
}
|
| 621 |
|
| 622 |
if (fputc(byte, file[channel]) == EOF) {
|
| 623 |
set_error(ERR_WRITEERROR);
|
| 624 |
return ST_TIMEOUT;
|
| 625 |
}
|
| 626 |
|
| 627 |
return ST_OK;
|
| 628 |
}
|
| 629 |
|
| 630 |
|
| 631 |
/*
|
| 632 |
* Execute command string
|
| 633 |
*/
|
| 634 |
|
| 635 |
void FSDrive::execute_command(char *command)
|
| 636 |
{
|
| 637 |
switch (command[0]) {
|
| 638 |
case 'I':
|
| 639 |
close_all_channels();
|
| 640 |
set_error(ERR_OK);
|
| 641 |
break;
|
| 642 |
|
| 643 |
case 'U':
|
| 644 |
if ((command[1] & 0x0f) == 0x0a) {
|
| 645 |
Reset();
|
| 646 |
} else
|
| 647 |
set_error(ERR_SYNTAX30);
|
| 648 |
break;
|
| 649 |
|
| 650 |
case 'G':
|
| 651 |
if (command[1] != ':')
|
| 652 |
set_error(ERR_SYNTAX30);
|
| 653 |
else
|
| 654 |
chdir_cmd(&command[2]);
|
| 655 |
break;
|
| 656 |
|
| 657 |
default:
|
| 658 |
set_error(ERR_SYNTAX30);
|
| 659 |
}
|
| 660 |
}
|
| 661 |
|
| 662 |
|
| 663 |
/*
|
| 664 |
* Execute 'G' command
|
| 665 |
*/
|
| 666 |
|
| 667 |
void FSDrive::chdir_cmd(char *dirpath)
|
| 668 |
{
|
| 669 |
char str[NAMEBUF_LENGTH];
|
| 670 |
char *p = str;
|
| 671 |
|
| 672 |
close_all_channels();
|
| 673 |
|
| 674 |
// G:. resets the directory path to its original setting
|
| 675 |
if (dirpath[0] == '.' && dirpath[1] == 0) {
|
| 676 |
change_dir(orig_dir_path);
|
| 677 |
} else {
|
| 678 |
|
| 679 |
// Convert directory name
|
| 680 |
for (int i=0; i<NAMEBUF_LENGTH && (*p++ = conv_from_64(*dirpath++, false)); i++) ;
|
| 681 |
|
| 682 |
if (!change_dir(str))
|
| 683 |
set_error(ERR_NOTREADY);
|
| 684 |
}
|
| 685 |
}
|
| 686 |
|
| 687 |
|
| 688 |
/*
|
| 689 |
* Reset drive
|
| 690 |
*/
|
| 691 |
|
| 692 |
void FSDrive::Reset(void)
|
| 693 |
{
|
| 694 |
close_all_channels();
|
| 695 |
cmd_len = 0;
|
| 696 |
set_error(ERR_STARTUP);
|
| 697 |
}
|
| 698 |
|
| 699 |
|
| 700 |
/*
|
| 701 |
* Conversion PETSCII->ASCII
|
| 702 |
*/
|
| 703 |
|
| 704 |
uint8 FSDrive::conv_from_64(uint8 c, bool map_slash)
|
| 705 |
{
|
| 706 |
if ((c >= 'A') && (c <= 'Z') || (c >= 'a') && (c <= 'z'))
|
| 707 |
return c ^ 0x20;
|
| 708 |
if ((c >= 0xc1) && (c <= 0xda))
|
| 709 |
return c ^ 0x80;
|
| 710 |
if ((c == '/') && map_slash && ThePrefs.MapSlash)
|
| 711 |
#ifdef __riscos__
|
| 712 |
return '.'; // directory separator is '.' in RO
|
| 713 |
if (c == '.') {return('_');} // convert dot to underscore
|
| 714 |
if (c == ' ') {return(0xa0);} // space --> hard space
|
| 715 |
#else
|
| 716 |
return '\\';
|
| 717 |
#endif
|
| 718 |
return c;
|
| 719 |
}
|
| 720 |
|
| 721 |
|
| 722 |
/*
|
| 723 |
* Conversion ASCII->PETSCII
|
| 724 |
*/
|
| 725 |
|
| 726 |
uint8 FSDrive::conv_to_64(uint8 c, bool map_slash)
|
| 727 |
{
|
| 728 |
if ((c >= 'A') && (c <= 'Z') || (c >= 'a') && (c <= 'z'))
|
| 729 |
return c ^ 0x20;
|
| 730 |
#ifdef __riscos__
|
| 731 |
if ((c == '.') && map_slash && ThePrefs.MapSlash)
|
| 732 |
#else
|
| 733 |
if ((c == '\\') && map_slash && ThePrefs.MapSlash)
|
| 734 |
#endif
|
| 735 |
return '/';
|
| 736 |
#ifdef __riscos__
|
| 737 |
if (c == '_') {return('.');} // convert underscore to dot
|
| 738 |
if (c == 0xa0) {return(' ');} // hard space -> space
|
| 739 |
#endif
|
| 740 |
return c;
|
| 741 |
}
|
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