/***********************************************************
Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
Amsterdam, The Netherlands.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the names of Stichting Mathematisch
Centrum or CWI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior permission.

STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

******************************************************************/

/* Mac module implementation */
/* Richard J. Walker April 7, 1994 Island Graphics Corp. */
/* Thanks to Guido's unix emulation routines */

#include "allobjects.h"
#include "modsupport.h"
#include "ceval.h"

#include <stdio.h>
#include <string.h>
#include <errno.h>

#include <fcntl.h>

#include "macdefs.h"
#include "dir.h"
#include "stat.h"

#ifndef MAXPATHLEN
#define MAXPATHLEN 1024
#endif

/* Prototypes for Unix simulation on Mac */

int access PROTO((char *path, int mode));
int chdir PROTO((char *path));
char *getbootvol PROTO((void));
char *getwd PROTO((char *));
int mkdir  PROTO((char *path, int mode));
DIR * opendir  PROTO((char *));
void closedir PROTO((DIR *));
struct direct * readdir PROTO((DIR *));
int rmdir  PROTO((char *path));
int stat  PROTO((char *path, struct stat *buf));
int sync PROTO((void));



static object *MacError; /* Exception mac.error */

/* Set a MAC-specific error from errno, and return NULL */

static object * 
mac_error() 
{
 	return err_errno(MacError);
}

/* MAC generic methods */

static object *
mac_1str(args, func)
	object *args;
	int (*func) FPROTO((const char *));
{
	char *path1;
	int res;
	if (!getargs(args, "s", &path1))
		return NULL;
	BGN_SAVE
	res = (*func)(path1);
	END_SAVE
	if (res < 0)
		return mac_error();
	INCREF(None);
	return None;
}

static object *
mac_2str(args, func)
	object *args;
	int (*func) FPROTO((const char *, const char *));
{
	char *path1, *path2;
	int res;
	if (!getargs(args, "(ss)", &path1, &path2))
		return NULL;
	BGN_SAVE
	res = (*func)(path1, path2);
	END_SAVE
	if (res < 0)
		return mac_error();
	INCREF(None);
	return None;
}

static object *
mac_strint(args, func)
	object *args;
	int (*func) FPROTO((const char *, int));
{
	char *path;
	int i;
	int res;
	if (!getargs(args, "(si)", &path, &i))
		return NULL;
	BGN_SAVE
	res = (*func)(path, i);
	END_SAVE
	if (res < 0)
		return mac_error();
	INCREF(None);
	return None;
}

static object *
mac_access(self, args)
	object *self;
	object *args;
{
	return mac_strint(args, access);
}

static object *
mac_chdir(self, args)
	object *self;
	object *args;
{
	return mac_1str(args, chdir);
}

static object *
mac_close(self, args)
	object *self;
	object *args;
{
	int fd, res;
	if (!getargs(args, "i", &fd))
		return NULL;
	BGN_SAVE
	res = close(fd);
	END_SAVE
	if (res < 0)
		return mac_error();
	INCREF(None);
	return None;
}

static object *
mac_dup(self, args)
	object *self;
	object *args;
{
	int fd;
	if (!getargs(args, "i", &fd))
		return NULL;
	BGN_SAVE
	fd = dup(fd);
	END_SAVE
	if (fd < 0)
		return mac_error();
	return newintobject((long)fd);
}

static object *
mac_fdopen(self, args)
	object *self;
	object *args;
{
	extern int fclose PROTO((FILE *));
	int fd;
	char *mode;
	FILE *fp;
	if (!getargs(args, "(is)", &fd, &mode))
		return NULL;
	BGN_SAVE
	fp = fdopen(fd, mode);
	END_SAVE
	if (fp == NULL)
		return mac_error();
	return newopenfileobject(fp, "(fdopen)", mode, fclose);
}

static object *
mac_getbootvol(self, args)
	object *self;
	object *args;
{
	char *res;
	if (!getnoarg(args))
		return NULL;
	BGN_SAVE
	res = getbootvol();
	END_SAVE
	if (res == NULL)
		return mac_error();
	return newstringobject(res);
}

static object *
mac_getcwd(self, args)
	object *self;
	object *args;
{
	char path[MAXPATHLEN];
	char *res;
	if (!getnoarg(args))
		return NULL;
	BGN_SAVE
	res = getwd(path);
	END_SAVE
	if (res == NULL) {
		err_setstr(MacError, path);
		return NULL;
	}
	return newstringobject(res);
}

static object *
mac_listdir(self, args)
	object *self;
	object *args;
{
	char *name;
	object *d, *v;
	DIR *dirp;
	struct direct *ep;
	if (!getargs(args, "s", &name))
		return NULL;
	BGN_SAVE
	if ((dirp = opendir(name)) == NULL) {
		RET_SAVE
		return mac_error();
	}
	if ((d = newlistobject(0)) == NULL) {
		closedir(dirp);
		RET_SAVE
		return NULL;
	}
	while ((ep = readdir(dirp)) != NULL) {
		v = newstringobject(ep->d_name);
		if (v == NULL) {
			DECREF(d);
			d = NULL;
			break;
		}
		if (addlistitem(d, v) != 0) {
			DECREF(v);
			DECREF(d);
			d = NULL;
			break;
		}
		DECREF(v);
	}
	closedir(dirp);
	END_SAVE

	return d;
}

static object *
mac_lseek(self, args)
	object *self;
	object *args;
{
	int fd;
	int where;
	int how;
	long res;
	if (!getargs(args, "(iii)", &fd, &where, &how))
		return NULL;
	BGN_SAVE
	res = lseek(fd, (long)where, how);
	END_SAVE
	if (res < 0)
		return mac_error();
	return newintobject(res);
}

static object *
mac_mkdir(self, args)
	object *self;
	object *args;
{
	return mac_strint(args, mkdir);
}

static object *
mac_open(self, args)
	object *self;
	object *args;
{
	char *path;
	int mode;
	int fd;
	if (!getargs(args, "(si)", &path, &mode))
		return NULL;
	BGN_SAVE
	fd = open(path, mode);
	END_SAVE
	if (fd < 0)
		return mac_error();
	return newintobject((long)fd);
}

static object *
mac_read(self, args)
	object *self;
	object *args;
{
	int fd, size;
	object *buffer;
	if (!getargs(args, "(ii)", &fd, &size))
		return NULL;
	buffer = newsizedstringobject((char *)NULL, size);
	if (buffer == NULL)
		return NULL;
	BGN_SAVE
	size = read(fd, getstringvalue(buffer), size);
	END_SAVE
	if (size < 0) {
		DECREF(buffer);
		return mac_error();
	}
	resizestring(&buffer, size);
	return buffer;
}

static object *
mac_rename(self, args)
	object *self;
	object *args;
{
	return mac_2str(args, rename);
}

static object *
mac_rmdir(self, args)
	object *self;
	object *args;
{
	return mac_1str(args, rmdir);
}

static object *
mac_stat(self, args)
	object *self;
	object *args;
{
	struct stat st;
	char *path;
	int res;
	if (!getargs(args, "s", &path))
		return NULL;
	BGN_SAVE
	res = stat(path, &st);
	END_SAVE
	if (res != 0)
		return mac_error();
	return mkvalue("(llll)",
		    (long)st.st_mode,
		    (long)st.st_size,
		    (long)st.st_rsize,
		    (long)st.st_mtime);
}

static object *
mac_sync(self, args)
	object *self;
	object *args;
{
	int res;
	if (!getnoarg(args))
		return NULL;
	BGN_SAVE
	res = sync();
	END_SAVE
	if (res != 0)
		return mac_error();
	INCREF(None);
	return None;
}

static object *
mac_unlink(self, args)
	object *self;
	object *args;
{
	return mac_1str(args, unlink);
}

static object *
mac_write(self, args)
	object *self;
	object *args;
{
	int fd, size;
	char *buffer;
	if (!getargs(args, "(is#)", &fd, &buffer, &size))
		return NULL;
	BGN_SAVE
	size = write(fd, buffer, size);
	END_SAVE
	if (size < 0)
		return mac_error();
	return newintobject((long)size);
}

static struct methodlist mac_methods[] = {
	{"access",	mac_access},
	{"chdir",	mac_chdir},
	{"close",	mac_close},
	{"dup",		mac_dup},
	{"fdopen",	mac_fdopen},
	{"getbootvol",	mac_getbootvol}, /* non-standard */
	{"getcwd",	mac_getcwd},
	{"listdir",	mac_listdir},
	{"lseek",	mac_lseek},
	{"mkdir",	mac_mkdir},
	{"open",	mac_open},
	{"read",	mac_read},
	{"rename",	mac_rename},
	{"rmdir",	mac_rmdir},
	{"stat",	mac_stat},
	{"sync",	mac_sync},
	{"unlink",	mac_unlink},
	{"write",	mac_write},

	{NULL,		NULL}		 /* Sentinel */
};


void
initmac()
{
	object *m, *d, *v;
	
	m = initmodule("mac", mac_methods);
	d = getmoduledict(m);
	
	/* Initialize mac.error exception */
	MacError = newstringobject("mac.error");
	if (MacError == NULL || dictinsert(d, "error", MacError) != 0)
		fatal("can't define mac.error");
}