mirror of
https://github.com/cc65/cc65.git
synced 2024-12-23 04:30:10 +00:00
147 lines
4.7 KiB
C
147 lines
4.7 KiB
C
/* This is very simplified version of POSIX opendir(), readdir() and closedir() */
|
|
/* for Commodore computers. */
|
|
/* Created by Josef Soucek, 2003 E-mail:josef.soucek@ct.cz */
|
|
|
|
/* Version 0.1 - 21.1.2003 */
|
|
/* Tested with floppy drive and IDE64 devices */
|
|
/* Not tested with messed (buggy) directory listing */
|
|
/* Limits filenames to 16 chars (VICE supports more in directory listing) */
|
|
|
|
|
|
|
|
#include <cbm.h>
|
|
|
|
|
|
|
|
unsigned char __fastcall__ cbm_opendir (unsigned char lfn, unsigned char device)
|
|
{
|
|
unsigned char status;
|
|
if ((status = cbm_open (lfn, device, CBM_READ, "$")) == 0) {
|
|
if (cbm_k_chkin (lfn) == 0) {
|
|
if (cbm_k_basin () == 0x01) { /* Start address */
|
|
if (cbm_k_basin () == 0x04) {
|
|
cbm_k_clrch ();
|
|
return 0;
|
|
}
|
|
} else {
|
|
cbm_close (lfn);
|
|
cbm_k_clrch ();
|
|
return 2;
|
|
}
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
|
|
|
|
|
|
unsigned char __fastcall__ cbm_readdir (unsigned char lfn, register struct cbm_dirent* l_dirent)
|
|
{
|
|
unsigned char byte, i;
|
|
|
|
if (cbm_k_chkin (lfn) == 0) {
|
|
if (cbm_k_readst () == 0) {
|
|
cbm_k_basin (); /* 0x01, 0x01, next basic line */
|
|
cbm_k_basin ();
|
|
|
|
byte = cbm_k_basin(); /* File-size */
|
|
l_dirent->size = byte | ((cbm_k_basin()) << 8);
|
|
|
|
byte = cbm_k_basin();
|
|
|
|
if (byte == 'b') { /* "B" BLOCKS FREE. */
|
|
while (cbm_k_readst () == 0) { /* Read until end */
|
|
cbm_k_basin ();
|
|
}
|
|
cbm_k_clrch ();
|
|
return 2; /* END */
|
|
}
|
|
|
|
if (byte != '\"') {
|
|
while (cbm_k_basin() != '\"') {
|
|
if (cbm_k_readst () != 0) { /* ### Included to prevent */
|
|
cbm_k_clrch (); /* ### Endless loop */
|
|
return 3; /* ### Should be probably removed */
|
|
} /* ### */
|
|
}
|
|
}
|
|
|
|
i = 0;
|
|
while ((byte = cbm_k_basin ()) != '\"') {
|
|
if (cbm_k_readst () != 0) { /* ### Included to prevent */
|
|
cbm_k_clrch (); /* ### Endless loop */
|
|
return 4; /* ### Should be probably removed */
|
|
} /* ### */
|
|
|
|
if (i < sizeof (l_dirent->name) - 1) {
|
|
l_dirent->name[i] = byte;
|
|
++i;
|
|
}
|
|
}
|
|
l_dirent->name[i] = '\0';
|
|
|
|
while ((byte=cbm_k_basin ()) == ' ') {
|
|
if (cbm_k_readst ()) { /* ### Included to prevent */
|
|
cbm_k_clrch (); /* ### Endless loop */
|
|
return 5; /* ### Should be probably removed */
|
|
} /* ### */
|
|
}
|
|
|
|
switch (byte) {
|
|
case 's':
|
|
l_dirent->type = CBM_T_SEQ;
|
|
break;
|
|
case 'p':
|
|
l_dirent->type = CBM_T_PRG;
|
|
break;
|
|
case 'u':
|
|
l_dirent->type = CBM_T_USR;
|
|
break;
|
|
case 'r':
|
|
l_dirent->type = CBM_T_REL;
|
|
break;
|
|
case 'c':
|
|
l_dirent->type = CBM_T_CBM;
|
|
break;
|
|
case 'd':
|
|
l_dirent->type = CBM_T_DIR;
|
|
break;
|
|
case 'v':
|
|
l_dirent->type = CBM_T_VRP;
|
|
break;
|
|
default:
|
|
l_dirent->type = CBM_T_OTHER;
|
|
}
|
|
|
|
cbm_k_basin ();
|
|
cbm_k_basin ();
|
|
|
|
byte = cbm_k_basin ();
|
|
|
|
l_dirent->access = (byte == 0x3C)? CBM_A_RO : CBM_A_RW;
|
|
|
|
if (byte != 0) {
|
|
while (cbm_k_basin() != 0) {
|
|
if (cbm_k_readst () != 0) { /* ### Included to prevent */
|
|
cbm_k_clrch (); /* ### Endless loop */
|
|
return 6; /* ### Should be probably removed */
|
|
} /* ### */
|
|
}
|
|
}
|
|
|
|
cbm_k_clrch ();
|
|
return 0; /* Line read successfuly */
|
|
}
|
|
}
|
|
cbm_k_clrch ();
|
|
return 1;
|
|
}
|
|
|
|
|
|
void __fastcall__ cbm_closedir( unsigned char lfn)
|
|
{
|
|
cbm_close(lfn);
|
|
}
|
|
|
|
|