/* xlpeek - peek at a character from a file or stream */
int xlpeek(LVAL fptr)
{
LVAL lptr, cptr=NULL;
int ch;
/* check for input from nil */
if (fptr == NIL)
ch = EOF;
/* otherwise, check for input from a stream */
else if (ustreamp(fptr)) {
if ((lptr = gethead(fptr)) == NIL)
ch = EOF;
else {
if (!consp(lptr) || (cptr = car(lptr)) == NIL || !charp(cptr))
xlfail("bad stream");
ch = getchcode(cptr);
}
}
/* otherwise, get the next file character and save it */
else {
ch = xlgetc(fptr);
setsavech(fptr,ch);
}
/* return the character */
return (ch);
}
/* xcharp - is this a character? */
LVAL xcharp(void)
{
LVAL arg;
arg = xlgetarg();
xllastarg();
return (charp(arg) ? s_true : NIL);
}
int atomp(int x){
if(numberp(x) || symbolp(x) || charp(x) || stringp(x) || booleanp(x) || identifierp(x)
|| IS_SYNCLO(x))
return(1);
else
return(0);
}
/* check an item instance variable */
static LVAL check_item_ivar P2C(int, which, LVAL, value)
{
int good=0;
switch (which) {
case 'T': good = (stringp(value) && strlen(getstring(value)) != 0); break;
case 'K': good = (charp(value) || value == NIL); break;
case 'M': good = (charp(value) || value == NIL || value == s_true); break;
case 'S': good = (symbolp(value) || listp(value)); break;
case 'A': good = (value == NIL || symbolp(value) || closurep(value) || subrp(value) || (bcclosurep(value))); break;
case 'E': good = TRUE; value = (value != NIL) ? s_true : NIL; break;
default: xlfail("unknown item instance variable");
}
if (! good) xlerror("bad instance variable value", value);
return(value);
}
/* xlgetc - get a character from a file or stream */
int xlgetc P1C(LVAL, fptr)
{
LVAL lptr,cptr=NULL;
FILEP fp;
int ch;
/* check for input from nil */
if (fptr == NIL)
ch = EOF;
/* otherwise, check for input from a stream */
else if (ustreamp(fptr)) {
if ((lptr = gethead(fptr)) == NIL)
ch = EOF;
else {
if (!consp(lptr) || (cptr = car(lptr)) == NIL || !charp(cptr))
xlfail("bad stream");
sethead(fptr,lptr = cdr(lptr));
if (lptr == NIL)
settail(fptr,NIL);
ch = getchcode(cptr);
}
}
/* otherwise, check for a buffered character */
else if ((ch = getsavech(fptr)) != 0)
setsavech(fptr,'\0');
/* otherwise, check for terminal input or file input */
else {
fp = getfile(fptr);
if (fp == CLOSED) /* TAA MOD -- give error */
xlfail("can't read closed stream");
else if (fp == CONSOLE)
/* TAA MOD -- revamped for redirecting */
ch = ostgetc();
else {
if ((fptr->n_sflags & S_FORREADING) == 0)
xlerror("can't read write-only file stream", fptr);
if ((fptr->n_sflags & S_READING) == 0) {
/* possible direction change*/
if (fptr->n_sflags & S_WRITING) {
OSSEEKCUR(fp,0L);
}
fptr->n_sflags |= S_READING;
fptr->n_sflags &= ~S_WRITING;
}
#ifdef OSAGETC
ch = (fptr->n_sflags & S_BINARY) ? OSGETC(fp) : OSAGETC(fp);
#else
ch = OSGETC(fp);
#endif
}
}
/* return the character */
return (ch);
}
void main()
{
FCPartitionDesc dbl("dbl","dbl");
FCPartitionDesc lng("lng","lng");
FCPartitionDesc charp("charp","charp");
FCPartitionDesc date("date","date");
FCPartitionDesc dblx("dblx","dblx");
FCPartitionDesc lngx("lngx","lngx");
FCPartitionDesc charpx("charpx","charpx");
FCPartitionDesc datex("datex","datex");
PDFriend::MakeADouble(dbl);
PDFriend::MakeACharPtr(charp);
PDFriend::MakeALong(lng);
PDFriend::MakeAColDate(date);
// test copy constructor..
FCPartitionDesc dbl2(dbl);
FCPartitionDesc lng2(lng);
FCPartitionDesc charp2(charp);
FCPartitionDesc date2(date);
dblx = dbl;
lngx = lng;
charpx = charp;
datex = date;
cout << "dbl----" << endl << dbl ;
cout << "lng----" << endl << lng ;
cout << "charp--" << endl << charp ;
cout << "date---" << endl << date << endl;
cout << "dbl2----" << endl << dbl2 ;
cout << "lng2----" << endl << lng2 ;
cout << "charp2--" << endl << charp2 ;
cout << "date2---" << endl << date2 << endl;
cout << "dblx----" << endl << dblx ;
cout << "lngx----" << endl << lngx ;
cout << "charpx--" << endl << charpx ;
cout << "date2x--" << endl << datex << endl;
cout << dbl.GetDouble() << endl;
cout << charp.GetCharPtr() << endl;
cout << lng.GetLong() << endl;
cout << date.GetColDate().nMonth << "/"
<< date.GetColDate().nDay << "/"
<< date.GetColDate().nYear << endl;
}
/* xlgetc - get a character from a file or stream */
int xlgetc(LVAL fptr)
{
LVAL lptr, cptr=NULL;
FILE *fp;
int ch;
/* check for input from nil */
if (fptr == NIL)
ch = EOF;
/* otherwise, check for input from a stream */
else if (ustreamp(fptr)) {
if ((lptr = gethead(fptr)) == NIL)
ch = EOF;
else {
if (!consp(lptr) || (cptr = car(lptr)) == NIL || !charp(cptr))
xlfail("bad stream");
sethead(fptr,lptr = cdr(lptr));
if (lptr == NIL)
settail(fptr,NIL);
ch = getchcode(cptr);
}
}
/* otherwise, check for a buffered character */
else if ((ch = getsavech(fptr)))
setsavech(fptr,'\0');
/* otherwise, check for terminal input or file input */
else {
fp = getfile(fptr);
if (fp == stdin || fp == STDERR)
ch = ostgetc();
else
ch = osagetc(fp);
#ifdef DEBUG_INPUT
if (read_by_xlisp && ch != -1) {
putc(ch, read_by_xlisp);
}
#endif
}
/* return the character */
return (ch);
}
