home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Almathera Ten Pack 3: CDPD 3
/
Almathera Ten on Ten - Disc 3: CDPD3.iso
/
fish
/
751-760
/
753
/
zoo
/
zoosrc.zoo
/
amiga.c
< prev
next >
Wrap
C/C++ Source or Header
|
1992-05-02
|
16KB
|
732 lines
#ifndef LINT
static char amigaid[] = "@(#) amiga.c 1.1 91/08/03 23:21:00";
#endif /* LINT */
/*
* machine.c for Amiga.
*
* This file is (C) Copyright 1991 by Olaf Seibert. All rights reserved. May
* be used and distributed under the same conditions as the other
* non-public-domain files that are part of Zoo.
*/
#undef TEXT /* typedef in exec/types.h */
#include <assert.h>
#include <exec/types.h>
#include <libraries/dos.h>
#include <signal.h>
#ifdef __STDC__
#define __args
#include <functions.h>
#else
BPTR Lock(), CreateDir(), ParentDir();
long Examine(), ExNext();
void *AllocMem();
struct MsgPort *DeviceProc();
long SetSignal();
#endif
int iswild PARMS((char *));
void endfile PARMS((int));
void fcbpath PARMS((char *, char *));
void ToDateStamp PARMS((struct DateStamp * datestamp, unsigned date, unsigned time));
void ToMSDate PARMS((unsigned *date, unsigned *time, struct DateStamp * datestamp));
void _abort PARMS((void));
long Chk_Abort PARMS((void));
/*
* WARNING: This file assumes that ZOOFILE is a standard buffered file.
* It will have to be modified if ZOOFILE is changed to be an unbuffered
* file descriptor or to any other kind of file.
*/
#ifdef UNBUF_IO
/*
* Function tell() returns the current seek position for a file
* descriptor. 4.3BSD on VAX-11/785 has an undocumented tell() function
* but it may not exist on all implementations, so we code one here to be
* on the safe side. It is needed for unbuffered I/O only.
*/
long lseek PARMS((int, long, int));
long
tell(fd)
int fd;
{
return lseek(fd, 0L, 1);
}
#endif
/*
* Function zootrunc() truncates a file.
*/
int
zootrunc(f)
ZOOFILE f;
{
fflush(f); /* just in case it matters */
/* Cannot truncate on AmigaOS < 2.0 */
}
/*
* Function fixfname() converts the supplied filename to a syntax legal
* for the host system. It is used during extraction.
*/
char *
fixfname(fname)
char *fname;
{
return fname; /* default is no-op */
}
/*
* Function isuadir() returns 1 if the supplied name is a directory, else
* it returns 0.
*/
int
isuadir(path)
char *path;
{
struct FileInfoBlock *fib;
int its_a_dir;
its_a_dir = 0;
if (fib = malloc(sizeof (*fib))) {
BPTR lock;
if (lock = Lock(path, ACCESS_READ)) {
Examine(lock, fib);
its_a_dir = (fib->fib_DirEntryType > 0);
UnLock(lock);
}
free(fib);
}
return its_a_dir;
}
/* No standard UNIX-compatible time routines */
/*
* Function getutime() gets the date and time of the file name supplied.
* Date and time is in MSDOS format.
*/
int
getutime(path, date, time)
char *path;
unsigned *date,
*time;
{
struct FileInfoBlock *fib;
*date = 0;
*time = 0;
if (fib = malloc(sizeof (*fib))) {
BPTR lock;
if (lock = Lock(path, ACCESS_READ)) {
Examine(lock, fib);
ToMSDate(date, time, &fib->fib_Date);
UnLock(lock);
}
free(fib);
}
return 0;
}
/*
* Function setutime() sets the date and time of the filename supplied.
* Date and time is in MSDOS format.
*/
int
setutime(path, date, time)
char *path;
unsigned int date,
time;
{
struct DateStamp DateStamp;
extern int SetFileDate PARMS((char *file, struct DateStamp * date));
ToDateStamp(&DateStamp, date, time);
return !SetFileDate(path, &DateStamp);
}
#ifdef AZTEC_C
# ifndef EXEC_MEMORY_H
# include <exec/memory.h>
# endif
# ifndef ACTION_SET_DATE
# define ACTION_SET_DATE 34L
# endif
int
SetFileDate(path, date)
char *path;
struct DateStamp *date;
{
struct MsgPort *task;
BPTR lock,
plock;
UBYTE *bcplstring;
int result;
if (!(bcplstring = (UBYTE *) AllocMem(64L, (long) MEMF_PUBLIC)))
return 0;
result = 0;
if (!(task = DeviceProc(path))) {
goto abort;
}
if (!(lock = Lock(path, SHARED_LOCK))) {
goto abort;
}
plock = ParentDir(lock);
UnLock(lock);
/* Strip pathnames first */
strcpy((char *) (bcplstring + 1), nameptr(path));
*bcplstring = strlen((char *) (bcplstring + 1));
result = dos_packet(task, ACTION_SET_DATE, NULL, plock,
(ULONG) bcplstring >> 2, (ULONG) date, 0L, 0L, 0L);
UnLock(plock);
abort:
FreeMem((void *) bcplstring, 64L);
return result;
}
#endif
/* No standard UNIX-specific file attribute routines */
/*
* Get file attributes. Currently only the lowest nine of the *IX mode
* bits are used. Also we return bit 23=0 and bit 22=1, which means use
* portable attribute format, and use attribute value instead of using
* default at extraction time.
*/
unsigned long
getfattr(f)
ZOOFILE f;
{
return NO_FATTR; /* inaccessible -- no attributes */
}
/*
* Set file attributes. Only the lowest nine bits are used.
*/
int
setfattr(f, a)
char *f; /* filename */
unsigned long a; /* atributes to set */
{
return 0; /* cannot do */
}
int
iswild(name)
char *name;
{
return (strchr(name, '*') != NULL) || (strchr(name, '?') != NULL);
}
#define FMAX 3 /* Number of different filename patterns */
/* #include "various.h" */
/* #include "zoo.h" *//* solely to define PATHSIZE */
#ifdef SPECNEXT
/*-
nextfile() returns the name of the next source file matching a filespec.
INPUT
what: A flag specifying what to do. If "what" is 0, nextfile()
initializes itself. If "what" is 1, nextfile() returns the next
matching filename.
filespec: The filespec, usually containing wildcard characters, that
specifies which files are needed. If "what" is 0, filespec must be
the filespec for which matching filenames are needed. If "what" is 1,
nextfile() does not use "filespec" and "filespec" should be NULL to
avoid an assertion error during debugging.
fileset: nextfile() can keep track of more than one set of filespecs.
The fileset specifies which filespec is being matched and therefore
which set of files is being considered. "fileset" can be in the
range 0:FMAX. Initialization of one fileset does not affect the
other filesets.
OUTPUT
IF what == 0 THEN
return value is NULL
ELSE IF what == 1 THEN
IF a matching filename is found THEN
return value is pointer to matching filename including supplied path
ELSE
IF at least one file matched previously but no more match THEN
return value is NULL
ELSE IF supplied filespec never matched any filename THEN
IF this is the first call with what == 1 THEN
return value is pointer to original filespec
ELSE
return value is NULL
END IF
END IF
END IF
END IF
NOTE
Initialization done when "what"=0 is not dependent on the correctness
of the supplied filespec but simply initializes internal variables
and makes a local copy of the supplied filespec. If the supplied
filespec was illegal, the only effect is that the first time that
nextfile() is called with "what"=1, it will return the original
filespec instead of a matching filename. That the filespec was
illegal will become obvious when the caller attempts to open the
returned filename for input/output and the open attempt fails.
USAGE HINTS
nextfile() can be used in the following manner:
char *filespec; -- will point to filespec
char *this_file; -- will point to matching filename
filespec = parse_command_line(); -- may contain wildcards
FILE *stream;
nextfile (0, filespec, 0); -- initialize fileset 0
while ((this_file = nextfile(1, (char *) NULL, 0)) != NULL) {
stream = fopen (this_file, "whatever");
if (stream == NULL)
printf ("could not open %s\n", this_file);
else
perform_operations (stream);
}
*/
static int first_time[FMAX + 1];
static BPTR filelock[FMAX + 1];
static struct FileInfoBlock *fib[FMAX + 1];
char *
nextfile(what, filespec, fileset)
int what; /* whether to initialize or match */
register char *filespec; /* filespec to match if initializing */
register int fileset; /* which set of files */
{
static char pathholder[FMAX + 1][PATHSIZE]; /* holds a pathname to
* return */
static char saved_fspec[FMAX + 1][PATHSIZE]; /* our own copy of
* filespec */
long success;
char *ph_fs;
BPTR fl_fs;
struct FileInfoBlock *fib_fs;
assert(fileset >= 0 && fileset <= FMAX);
ph_fs = pathholder[fileset];
fl_fs = filelock[fileset];
fib_fs = fib[fileset];
if (what == 0) {
assert(filespec != NULL);
strcpy(saved_fspec[fileset], nameptr(filespec)); /* save the filespec */
strcpy(ph_fs, filespec);/* save the path */
first_time[fileset] = 1;
return NULL;
}
assert(what == 1);
assert(filespec == NULL);
assert(first_time[fileset] == 0 || first_time[fileset] == 1);
success = DOSFALSE;
if (first_time[fileset]) { /* first time -- initialize etc. */
filelock[fileset] = fl_fs = 0;
if (!iswild(saved_fspec[fileset])) {
goto notwild;
}
if (fib[fileset] = fib_fs = malloc(sizeof (struct FileInfoBlock))) {
char *np,
n;
np = nameptr(ph_fs);
n = *np;
*np = '\0';
if (filelock[fileset] = fl_fs = Lock(ph_fs, ACCESS_READ)) {
Examine(fl_fs, fib_fs);
assert(fib->fib_DirEntryType > 0);
}
*np = n;
}
}
/* find first or next matching file; skip directories (type > 0) */
if (fib_fs) {
for (;;) {
success = ExNext(fl_fs, fib_fs);
if (success == DOSFALSE)
break;
if (fib_fs->fib_DirEntryType > 0)
continue;
if (match_half(fib_fs->fib_FileName, saved_fspec[fileset]))
break;
}
}
if (success == DOSFALSE) { /* if error status */
notwild:
if (first_time[fileset]) { /* if file never matched then */
first_time[fileset] = 0;
return ph_fs; /* return original filespec */
} else { /* else */
endfile(fileset);
return NULL; /* return NULL for no more */
}
} else { /* a file matched */
first_time[fileset] = 0;
/* add path info */
strcpy(nameptr(ph_fs), fib_fs->fib_FileName);
return ph_fs; /* matching path */
}
/* NOTREACHED */
} /* nextfile */
void
endfile(fileset)
int fileset;
{
assert(fileset >= 0 && fileset <= FMAX);
first_time[fileset] = 0;
if (fib[fileset]) {
free(fib[fileset]);
fib[fileset] = NULL;
}
if (filelock[fileset]) {
UnLock(filelock[fileset]);
filelock[fileset] = 0;
}
}
#endif
char *
mktemp(name)
char *name;
{
char *x;
if (x = strchr(name, 'X')) {
struct DateStamp ds;
long rnd;
BPTR lock;
DateStamp(&ds);
rnd = (ds.ds_Days << 17) + (ds.ds_Minute << 6) + ds.ds_Tick;
retry:
rnd += (rnd >> 24);
sprintf(x, "%06lx", rnd & 0x00ffffff);
if (lock = Lock(name, ACCESS_READ)) {
UnLock(lock);
rnd--;
goto retry;
}
}
return name;
}
#ifdef AZTEC_C
# ifndef __STDC__
/*
* A bit of a rough (and rude) implementation of realloc
*/
void *
realloc(oldptr, size)
char *oldptr;
unsigned int size;
{
char *newptr;
newptr = malloc(size);
if (newptr) {
CopyMem(oldptr, newptr, (long) size);
free(oldptr);
}
return newptr;
}
# endif
#endif
void
makedir(name)
char *name;
{
BPTR lock;
if (lock = CreateDir(name)) {
UnLock(lock);
}
}
#define BASEYEAR 1978
#define DAYS_PER_YEAR 365
#define HOURS_PER_DAY 24
#define MINUTES_PER_HOUR 60
#define SECONDS_PER_MINUTE 60
#define DAYS_PER_WEEK 7
#define MONTHS_PER_YEAR 12
#define MINUTES_PER_DAY (MINUTES_PER_HOUR * HOURS_PER_DAY)
#define SECONDS_PER_DAY ((long) SECONDS_PER_MINUTE * \
MINUTES_PER_HOUR * HOURS_PER_DAY)
#define DATE_MIN 0x21 /* 1-jan-80 */
#define LeapYear(year) ((year & 3) == 0) /* From 1-Mar-1901 to
* 28-Feb-2100 */
int daycount[MONTHS_PER_YEAR] = {
31, 28, 31, 30, 31, 30,
31, 31, 30, 31, 30, 31
};
void
ToDateStamp(datestamp, date, time)
struct DateStamp *datestamp;
unsigned date;
unsigned time;
{
{
int hours,
minutes,
seconds;
seconds = (time & 31) * 2;
time >>= 5;
minutes = time & 63;
time >>= 6;
hours = time;
datestamp->ds_Minute = MINUTES_PER_HOUR * hours + minutes;
datestamp->ds_Tick = TICKS_PER_SECOND * seconds;
}
{
unsigned i,
j,
t;
int year,
month,
day;
if (date < DATE_MIN)
date = DATE_MIN;
day = date & 31;
date >>= 5;
month = (date & 15) - 1;
date >>= 4;
year = date + 1980;
if ((unsigned) month > 11 ||
(unsigned) day > (unsigned) daycount[month]) {
day = 31;
month = 11;
year = 1979;
}
j = year - BASEYEAR;
/*
* Get the next lower full leap period (4 years and a day) since
* ...
*/
t = (year - BASEYEAR) & ~3;
i = t;
t = (t / 4) * (4 * DAYS_PER_YEAR + 1);
/* t now is the number of days in 4 whole years since ... */
while (i < j) {
t += DAYS_PER_YEAR;
if (LeapYear(i + BASEYEAR)) {
t++;
}
i++;
}
/* t now is the number of days in whole years since ... */
for (i = 0; i < month; i++) {
t += daycount[i];
if (i == 1 && LeapYear(year)) {
t++;
}
}
/* t now is the number of days in whole months since ... */
t += day - 1;
/* t now is the number of days in whole days since ... */
datestamp->ds_Days = t;
}
}
void
ToMSDate(date, time, datestamp)
unsigned *date;
unsigned *time;
register struct DateStamp *datestamp;
{
{
unsigned short hours,
minutes,
seconds;
hours = datestamp->ds_Minute / MINUTES_PER_HOUR;
minutes = datestamp->ds_Minute % MINUTES_PER_HOUR;
seconds = datestamp->ds_Tick / TICKS_PER_SECOND;
*time = (hours << 11) | (minutes << 5) | (seconds / 2);
}
{
register long days,
i,
t;
int year,
month,
day;
days = datestamp->ds_Days;
year = BASEYEAR + (days / (4 * DAYS_PER_YEAR + 1)) * 4;
days %= 4 * DAYS_PER_YEAR + 1;
while (days) {
t = DAYS_PER_YEAR;
if (LeapYear(year))
t++;
if (days < t)
break;
days -= t;
year++;
}
days++;
for (i = 0; i < MONTHS_PER_YEAR; i++) {
t = daycount[i];
if (i == 1 && LeapYear(year))
t++;
if (days <= t)
break;
days -= t;
}
month = i + 1;
day = days;
*date = ((year - 1980) << 9) | (month << 5) | day;
}
}
void spec_init PARMS((void));
void
spec_init()
{
#ifndef NOSIGNAL
signal(SIGINT, _abort);
#endif
}
void
zooexit(code)
int code;
{
int i;
#ifdef SPECNEXT
for (i = 0; i <= FMAX; i++)
endfile(i);
#endif
exit(code);
}
/*
* called by DB debugger and on CTRL-C.
*/
void
_abort()
{
zooexit(20);
}
#ifdef NEED_SIGNAL
/*
* A minimalistic signal implementation, that ignores the signal number,
* which is assumed to be SIGINT.
*/
static void (*Handler) PARMS((int));
void
(*signal(sig, handler)) PARMS((int))
int sig;
void (*handler) PARMS((int));
{
void (*oldhandler) PARMS((int));
assert(sig == SIGINT);
oldhandler = Handler;
Handler = handler;
Chk_Abort();
return oldhandler;
}
/*
* This function should have the name that is used by your C library to
* poll CTRL-C.
*/
long
Chk_Abort PARMS((void))
{
if (Handler == SIG_IGN) {
/*
* Don't clear the signal; if the user wants to abort we'll do
* that when it is allowed again.
*/
return 0;
}
if ((SetSignal(0L, SIGBREAKF_CTRL_C) & SIGBREAKF_CTRL_C)) {
void (*oldhandler) PARMS((int));
oldhandler = Handler;
Handler = SIG_DFL;
if (oldhandler == SIG_DFL) {
_abort(); /* must call zooexit() */
zooexit(20); /* just in case */
}
(*oldhandler) (SIGINT);
return 1;
}
return 0;
}
#endif