89 lines
1.7 KiB
C
89 lines
1.7 KiB
C
#include "dat.h"
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#include "fn.h"
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#include <stdlib.h>
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#include <string.h>
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static Object*
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newobj(GC *gc, enum OType type, int sz)
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{
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Object *obj = gcalloc(gc, sizeof(Object) + sz);
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obj->type = type;
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return obj;
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}
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Object*
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newint(GC *gc, long val)
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{
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Object *obj = newobj(gc, OINT, 0);
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obj->num = val;
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return obj;
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}
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Object*
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newcons(GC *gc, Object *car, Object *cdr)
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{
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Object *obj = newobj(gc, OCELL, 0);
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obj->car = car;
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obj->cdr = cdr;
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return obj;
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}
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Object*
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newenv(GC *gc, Object* name, Object *vars, Object *up)
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{
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Object *obj = newobj(gc, OENV, 0);
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obj->name = name;
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obj->up = up;
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obj->vars = vars;
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return obj;
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}
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Object*
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newacons(GC *gc, Object *x, Object *y, Object *z)
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{
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Object *cons = newcons(gc, x, y);
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return newcons(gc, cons ,z);
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}
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Object*
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newfn(GC *gc, Object *env, Object *params, Object *body, enum OType type)
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{
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Object *fn = newobj(gc, type, 0);
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fn->type = type;
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fn->params = params;
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fn->body = body;
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fn->env = env;
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return fn;
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}
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Object*
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newsymbol(GC *gc, char *str, int len)
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{
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static Object *syms[] = {
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&Nil, &Minus, &Plus, &Mul, &Mod, &Div, &Ge, &Le,
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&Lt, &Gt, &Ne, &Lambda, &Car, &Cdr, &Quote, &Cons,
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&Define, &Setq, &Eq, &If, &Macro, &Progn, &Bquote,
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&Comma,
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};
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for(int i = 0; i < sizeof(syms)/sizeof(syms[0]); ++i){
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Object *c = syms[i];
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if(strlen(c->beg)==len && memcmp(c->beg, str, len) == 0)
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return c;
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}
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Object *obj = newobj(gc, OIDENT, len + 1);
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obj->ptr = obj->beg = (char*)&obj[1];
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obj->end = obj->beg + len;
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memcpy(obj->beg, str, len + 1);
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obj->ptr += len;
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return obj;
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}
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Object*
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newstr(GC *gc, int len)
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{
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Object *obj = newobj(gc, OSTRING, len + 1);
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obj->ptr = obj->beg = (char*)&obj[1];
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obj->end = obj->beg + len;
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return obj;
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}
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