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/****************************************************************/
/* predicates.c
/* 1986-Jul 6, Copyright(C), T.Matsui
*****************************************************************/
static char *rcsid="@(#)$Id$";
#include "eus.h"
extern pointer call1(context *, pointer, pointer);
extern pointer call2(context *, pointer, pointer, pointer);
pointer ATOM(ctx,n,argv)
register context *ctx;
int n;
register pointer *argv;
{ ckarg(1);
return(islist(argv[0])?NIL:T);}
pointer EQ(ctx,n,argv)
register context *ctx;
register int n;
register pointer *argv;
{ ckarg(2);
return(argv[0]==argv[1]?T:NIL);}
pointer NILP(ctx,n,argv)
register context *ctx;
register int n;
register pointer *argv;
{ ckarg(1);
return(argv[0]==NIL?T:NIL);}
pointer SYMBOLP(ctx,n,argv)
register context *ctx;
int n;
register pointer *argv;
{ ckarg(1);
return(issymbol(*argv)?T:NIL);}
pointer STRINGP(ctx,n,argv)
register context *ctx;
int n;
pointer *argv;
{ ckarg(1);
return(isstring(*argv)?T:NIL);}
pointer LISTP(ctx,n,argv)
register context *ctx;
int n;
pointer *argv;
{ register pointer a=argv[0];
ckarg(1);
if (islist(a)) return(T);
else if (a==NIL) return(T);
else return(NIL);}
pointer CONSP(ctx,n,argv)
register context *ctx;
int n;
register pointer *argv;
{ ckarg(1);
return(islist(argv[0])?T:NIL);}
pointer ENDP(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ ckarg(1);
if (argv[0]==NIL) return(T);
else if (islist(argv[0])) return(NIL);
else error(E_NOLIST);}
pointer NUMBERP(ctx,n,argv)
register context *ctx;
int n;
register pointer *argv;
{ ckarg(1);
if (isnum(argv[0]) || pisextnum(argv[0])) return(T);
else return(NIL);}
pointer INTEGERP(ctx,n,argv)
register context *ctx;
int n;
register pointer *argv;
{ ckarg(1);
return(isint(argv[0])?T:NIL);}
pointer FLOATP(ctx,n,argv)
register context *ctx;
int n;
register pointer *argv;
{ ckarg(1);
return(isflt(argv[0])?T:NIL);}
pointer BOUNDP(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ register pointer a=argv[0], vtp;
ckarg(1);
if (!issymbol(a)) error(E_NOSYMBOL);
vtp=a->c.sym.vtype;
if (SPEVALOF(a)==UNBOUND) return(NIL);
else return(T);}
pointer FBOUNDP(ctx,n,argv)
register context *ctx;
int n;
register pointer *argv;
{ register pointer a=argv[0];
ckarg(1);
if (!issymbol(a)) error(E_NOSYMBOL);
if (a->c.sym.spefunc==UNBOUND) return(NIL); else return(T);}
pointer STREAMP(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ register pointer s=argv[0];
ckarg(1);
if (isstream(s) || isiostream(s)) return(T);
else return(NIL);}
pointer superequal(x,y) /* mutex_lock before call */
register pointer x,y;
{ register int i,n,xe;
register eusinteger_t *cx,*cy;
bpointer bx,by;
pointer result;
if (x==y) return(T);
if (isnum(x) || isnum(y)) return(NIL);
if (x->cix != y->cix) return(NIL); /*different class*/
if (pissymbol(x)) return(NIL);
bx=bpointerof(x);
by=bpointerof(y);
if (bx->h.mark || by->h.mark) return(UNBOUND); /*circular list*/
xe=bx->h.elmtype;
if (xe!=by->h.elmtype) return(NIL); /*element type mismatch*/
if (xe==ELM_FIXED || xe==ELM_POINTER) {
bx->h.mark=by->h.mark=1;
if (xe==ELM_POINTER) n=vecsize(x)+1;
else n=objsize(x);
for (i=0; i<n; i++) {
result=superequal(x->c.obj.iv[i],y->c.obj.iv[i]);
if (result!=T) {
bx->h.mark=by->h.mark=0;
return(result);} }
/*all elements matched*/
bx->h.mark=by->h.mark=0;
return(T);}
else {
n=vecsize(x);
if (n!=vecsize(y)) return(NIL); /*length mismatch*/
cx=x->c.ivec.iv; cy=y->c.ivec.iv;
switch(xe) {
case ELM_BIT: n=(n+WORD_SIZE-1)/WORD_SIZE; break;
case ELM_CHAR: case ELM_BYTE: n=(n+sizeof(eusinteger_t)-1)/sizeof(eusinteger_t); break;
case ELM_FOREIGN: cx=(eusinteger_t *)(cx[0]); cy=(eusinteger_t *)(cy[0]); break;}
for (i=0; i<n; i++) if (cx[i]!=cy[i]) return(NIL);
return(T);} }
pointer equal(x,y)
register pointer x,y;
{ register int i,n,xe;
register eusinteger_t *cx,*cy;
if (x==y) return(T);
if (isnum(x) || isnum(y)) return(NIL);
if (x->cix != y->cix) return(NIL); /*different class*/
if (pissymbol(x)) return(NIL);
xe=elmtypeof(x);
if (xe!=elmtypeof(y)) return(NIL); /*element type mismatch*/
/* foreign string is always not equal to normal string */
if (xe==ELM_FIXED || xe==ELM_POINTER) {
if (xe==ELM_POINTER) n=vecsize(x)+1;
else n=objsize(x);
for (i=0; i<n; i++)
if (equal(x->c.obj.iv[i],y->c.obj.iv[i])!=T) return(NIL);
return(T);}
else {
n=vecsize(x);
if (n!=vecsize(y)) return(NIL); /*length mismatch*/
cx=x->c.ivec.iv; cy=y->c.ivec.iv;
switch(xe) {
case ELM_BIT: n=(n+WORD_SIZE-1)/WORD_SIZE; break;
case ELM_CHAR: case ELM_BYTE: n=(n+sizeof(eusinteger_t)-1)/sizeof(eusinteger_t); break;
case ELM_FOREIGN: cx=(eusinteger_t *)(cx[0]); cy=(eusinteger_t *)(cy[0]); break;}
for (i=0; i<n; i++) if (cx[i]!=cy[i]) return(NIL);
return(T);} }
pointer EQUAL(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ ckarg(2);
return(equal(argv[0],argv[1]));}
pointer SUPEREQUAL(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ register pointer result;
ckarg(2);
#if THREADED
mutex_lock(&mark_lock);
mark_locking="SUPEREQUAL";
result=superequal(argv[0],argv[1]);
mutex_unlock(&mark_lock);
#else
result=superequal(argv[0],argv[1]);
#endif
if (result==UNBOUND) error(E_CIRCULAR);
else return(result);}
void predicates(ctx,mod)
register context *ctx;
register pointer mod;
{ /* preds*/
defun(ctx,"ATOM",mod,ATOM,NULL);
QEQ=defun(ctx,"EQ",mod,EQ,NULL);
QEQ=QEQ->c.sym.spefunc;
defun(ctx,"EQL",mod,EQ,NULL);
defun(ctx,"NULL",mod,NILP,NULL);
QNOT=defun(ctx,"NOT",mod,NILP,NULL);
QEQUAL=defun(ctx,"EQUAL",mod,EQUAL,NULL);
defun(ctx,"SUPEREQUAL",mod,SUPEREQUAL,NULL);
defun(ctx,"SYMBOLP",mod,SYMBOLP,NULL);
defun(ctx,"STRINGP",mod,STRINGP,NULL);
defun(ctx,"LISTP",mod,LISTP,NULL);
defun(ctx,"CONSP",mod,CONSP,NULL);
defun(ctx,"ENDP",mod,ENDP,NULL);
defun(ctx,"NUMBERP",mod,NUMBERP,NULL);
defun(ctx,"INTEGERP",mod,INTEGERP,NULL);
defun(ctx,"FLOATP",mod,FLOATP,NULL);
defun(ctx,"BOUNDP",mod,BOUNDP,NULL);
defun(ctx,"FBOUNDP",mod,FBOUNDP,NULL);
defun(ctx,"STREAMP",mod,STREAMP,NULL); }
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