home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Epic Collection 3
/
Epic Collection 3, The (1997)(Epic Marketing)[!].iso
/
useful_tools
/
amicdfs
/
src
/
generic.c
< prev
next >
Wrap
C/C++ Source or Header
|
1994-10-04
|
8KB
|
382 lines
/* generic.c:
*
* Generic interface to the protocol handlers.
*
* Modified by Nicola Salmoria.
*
* ----------------------------------------------------------------------
* This code is (C) Copyright 1993,1994 by Frank Munkert.
* All rights reserved.
* This software may be freely distributed and redistributed for
* non-commercial purposes, provided this notice is included.
* ----------------------------------------------------------------------
* [History removed]
*/
#include <stdlib.h>
#include <string.h>
#include <dos/dos.h>
#include <exec/types.h>
#include <exec/memory.h>
#include <proto/exec.h>
#include <proto/dos.h>
#include <proto/intuition.h>
#include <proto/utility.h>
#include <proto/input.h>
#include "cdrom.h"
#include "generic.h"
#include "iso9660.h"
#include "rock.h"
#include "hfs.h"
/* note that vol may be either a VOLUME * or a CDROM_OBJ * */
#define HAN(vol,func) (*(vol)->handler->func)
#define HANX(vol,func) ((vol)->handler->func)
/* WhichProtocol - examines which protocol is used.
*
* Input Variables:
* p_cdrom - CDROM descriptor
*
* Output Variables:
* p_skip - skip length for RockRidge disks
* p_offset - block offset of last session for multisession disks (ISO only)
*
* Result:
* PRO_ISO, PRO_HIGH_SIERRA, PRO_RR, PRO_HFS or PRO_UNKNOWN.
*/
t_protocol Which_Protocol (CDROM *p_cdrom,int *p_skip,t_ulong *p_offset)
{
BOOL hfs;
if (p_cdrom->model == MODEL_TOSHIBA_3401)
{
if (Is_XA_Mode_Disk(p_cdrom))
Mode_Select(p_cdrom, 0x81, 2048);
else
Mode_Select(p_cdrom, 0x00, 2048);
}
/* check for HFS first to speed up floppy access */
if (hfs = Uses_HFS_Protocol(p_cdrom, p_skip))
{
/* if a shift key is pressed, open this partition */
if (PeekQualifier() & (IEQUALIFIER_LSHIFT | IEQUALIFIER_RSHIFT))
return(PRO_HFS);
}
/* don't waste time trying the other file systems if it failed because of an error */
else if (IoErr() != ERROR_NOT_A_DOS_DISK) return(PRO_UNKNOWN);
if (Uses_Iso_Protocol(p_cdrom, p_offset))
{
VOLUME tmp_vol; /* temporary volume descriptor */
t_bool rr;
tmp_vol.cd = p_cdrom;
tmp_vol.protocol = PRO_ISO;
Iso_Init_Vol_Info(&tmp_vol, 0, *p_offset,0);
rr = Uses_Rock_Ridge_Protocol(&tmp_vol, p_skip);
HAN(&tmp_vol, close_vol_info)(&tmp_vol);
return(rr ? PRO_ROCK : PRO_ISO);
}
else if (hfs)
/* no ISO partition, so open the HFS partition */
return(PRO_HFS);
else if (Uses_High_Sierra_Protocol(p_cdrom))
return(PRO_HIGH_SIERRA);
else return(PRO_UNKNOWN);
}
VOLUME *Open_Volume(CDROM *p_cdrom,t_bool lowercase)
{
VOLUME *res;
int skip;
t_ulong offset;
res = AllocMem (sizeof (VOLUME), MEMF_PUBLIC);
if (!res) {
SetIoErr(ERROR_NO_FREE_STORE);
return NULL;
}
res->cd = p_cdrom;
res->protocol = Which_Protocol (p_cdrom,&skip,&offset);
switch (res->protocol) {
case PRO_ISO:
if (!Iso_Init_Vol_Info (res, skip, offset, lowercase)) {
FreeMem (res, sizeof (VOLUME));
return NULL;
}
break;
case PRO_ROCK:
if (!Iso_Init_Vol_Info (res, skip, offset, 0)) {
FreeMem (res, sizeof (VOLUME));
return NULL;
}
break;
case PRO_HFS:
if (!HFS_Init_Vol_Info (res, skip)) {
FreeMem (res, sizeof (VOLUME));
return NULL;
}
break;
default:
FreeMem (res, sizeof (VOLUME));
return NULL;
}
return res;
}
void Close_Volume (VOLUME *p_volume)
{
HAN(p_volume, close_vol_info)(p_volume);
FreeMem (p_volume, sizeof (VOLUME));
}
CDROM_OBJ *Open_Top_Level_Directory (VOLUME *p_volume)
{
return(HAN(p_volume, open_top_level_directory)(p_volume));
}
CDROM_OBJ *Open_Object(VOLUME *p_volume,CDROM_OBJ *p_current_dir, char *p_path_name)
{
char *cp = p_path_name;
CDROM_OBJ *obj, *new;
char *np;
char name[100];
if (*cp == ':') {
obj = HAN(p_volume, open_top_level_directory)(p_volume);
cp++;
} else {
obj = Clone_Object (p_current_dir);
if (!obj) {
SetIoErr(ERROR_NO_FREE_STORE);
return NULL;
}
while (*cp == '/') {
new = HAN(p_volume, find_parent)(p_volume,obj);
if (!new)
return NULL;
Close_Object(obj);
obj = new;
cp++;
}
}
while (*cp) {
for (np = name; *cp && *cp != '/'; )
*np++ = *cp++;
*np = 0;
if (*cp)
cp++;
if (new = HAN(p_volume, open_obj_in_directory)(p_volume,obj, name)) {
Close_Object(obj);
if (*cp && new->symlink_f) {
Close_Object(new);
SetIoErr(ISOERR_IS_SYMLINK);
return NULL;
}
if (*cp && !new->directory_f) {
Close_Object(new);
SetIoErr(ISOERR_NOT_FOUND);
return NULL;
}
obj = new;
} else {
Close_Object(obj);
return NULL;
}
}
return(obj);
}
void Close_Object(CDROM_OBJ *p_object)
{
HAN(p_object,close_obj)(p_object);
}
int Read_From_File (VOLUME *p_volume,CDROM_OBJ *p_file, char *p_buffer, int p_buffer_length)
{
return HAN(p_volume, read_from_file)(p_volume,p_file, p_buffer, p_buffer_length);
}
LONG CDROM_Info (VOLUME *p_volume,CDROM_OBJ *p_obj, CDROM_INFO *p_info)
{
return HAN(p_volume, cdrom_info)(p_volume,p_obj, p_info);
}
LONG Examine_Next (VOLUME *p_volume,CDROM_OBJ *p_dir, CDROM_INFO *p_info, unsigned long *p_offset)
{
return HAN(p_volume, examine_next)(p_volume,p_dir, p_info, p_offset);
}
CDROM_OBJ *Clone_Object (CDROM_OBJ *p_object)
{
CDROM_OBJ *new;
if (!(new = AllocMem(sizeof(CDROM_OBJ),MEMF_PUBLIC)))
return NULL;
memcpy(new,p_object,sizeof(CDROM_OBJ));
if (!(new->obj_info = HAN(p_object,clone_obj_info)(p_object->obj_info)))
{
FreeMem(new,sizeof(CDROM_OBJ));
return(NULL);
}
return(new);
}
CDROM_OBJ *Find_Parent (VOLUME *p_volume,CDROM_OBJ *p_object)
{
return(HAN(p_volume, find_parent)(p_volume,p_object));
}
t_bool Is_Top_Level_Object (VOLUME *p_volume,CDROM_OBJ *p_object)
{
return HAN(p_volume, is_top_level_obj)(p_volume,p_object);
}
t_bool Same_Objects (CDROM_OBJ *p_object1, CDROM_OBJ *p_object2)
{
if (p_object1->handler != p_object2->handler) return(FALSE);
else return(HAN(p_object1,same_objects)(p_object1,p_object2));
}
t_ulong Volume_Creation_Date (VOLUME *p_volume)
{
if (!HANX(p_volume, creation_date))
return 0;
return HAN(p_volume, creation_date)(p_volume);
}
t_ulong Volume_Size (VOLUME *p_volume)
{
return HAN(p_volume, volume_size)(p_volume);
}
t_ulong Volume_Free (VOLUME *p_volume)
{
return HAN(p_volume, volume_free)(p_volume);
}
t_ulong Block_Size (VOLUME *p_volume)
{
return HAN(p_volume, block_size)(p_volume);
}
void Volume_ID (VOLUME *p_volume, char *p_buffer, int p_buf_length)
{
HAN(p_volume, volume_id)(p_volume, p_buffer, p_buf_length);
}
t_ulong Location (VOLUME *p_volume,CDROM_OBJ *p_object)
{
return HAN(p_volume, location)(p_volume,p_object);
}
/* Find a position in a file.
*/
LONG Seek_Position (CDROM_OBJ *p_object, long p_offset, int p_mode)
{
t_ulong new_pos;
t_ulong max_len;
max_len = HAN(p_object,file_length)(p_object);
if (p_object->directory_f) return(ERROR_OBJECT_WRONG_TYPE);
switch (p_mode)
{
case OFFSET_BEGINNING:
if (p_offset < 0 || p_offset > max_len) return(ERROR_SEEK_ERROR);
new_pos = p_offset;
break;
case OFFSET_CURRENT:
if ((p_offset < 0 && -p_offset > p_object->pos) ||
(p_offset > 0 && p_object->pos + p_offset > max_len))
return(ERROR_SEEK_ERROR);
new_pos = p_object->pos + p_offset;
break;
case OFFSET_END:
if (p_offset > 0 || -p_offset > max_len) return(ERROR_SEEK_ERROR);
new_pos = max_len + p_offset;
break;
default:
return(ERROR_SEEK_ERROR);
break;
}
p_object->pos = new_pos;
return(0);
}
/* Find path name of an object:
*
*/
int Full_Path_Name (VOLUME *p_volume,CDROM_OBJ *p_obj, char *p_buf, int p_buf_length)
{
int len = 0;
int free_chars = p_buf_length - 1;
CDROM_OBJ *obj = p_obj;
CDROM_OBJ *new;
CDROM_INFO info;
while (!Is_Top_Level_Object (p_volume,obj)) {
if (!CDROM_Info (p_volume,obj, &info))
return 0;
if (info.name_length+1 > free_chars)
return 0;
memmove (p_buf+1+info.name_length, p_buf, len);
memcpy (p_buf+1, info.name, info.name_length);
p_buf[0] = '/';
free_chars -= info.name_length + 1;
len += info.name_length + 1;
new = Find_Parent (p_volume,obj);
if (!new)
return 0;
if (obj != p_obj)
Close_Object(obj);
obj = new;
}
p_buf[0] = ':';
p_buf[len ? len : 1] = 0;
if (obj != p_obj)
Close_Object(obj);
return 1;
}